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Merge tag 'signed-for-3.13' of git://github.com/agraf/linux-2.6 into kvm-master
[deliverable/linux.git] / drivers / gpu / drm / i915 / intel_pm.c
1 /*
2 * Copyright © 2012 Intel Corporation
3 *
4 * Permission is hereby granted, free of charge, to any person obtaining a
5 * copy of this software and associated documentation files (the "Software"),
6 * to deal in the Software without restriction, including without limitation
7 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
8 * and/or sell copies of the Software, and to permit persons to whom the
9 * Software is furnished to do so, subject to the following conditions:
10 *
11 * The above copyright notice and this permission notice (including the next
12 * paragraph) shall be included in all copies or substantial portions of the
13 * Software.
14 *
15 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
19 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
20 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
21 * IN THE SOFTWARE.
22 *
23 * Authors:
24 * Eugeni Dodonov <eugeni.dodonov@intel.com>
25 *
26 */
27
28 #include <linux/cpufreq.h>
29 #include "i915_drv.h"
30 #include "intel_drv.h"
31 #include "../../../platform/x86/intel_ips.h"
32 #include <linux/module.h>
33 #include <drm/i915_powerwell.h>
34
35 /**
36 * RC6 is a special power stage which allows the GPU to enter an very
37 * low-voltage mode when idle, using down to 0V while at this stage. This
38 * stage is entered automatically when the GPU is idle when RC6 support is
39 * enabled, and as soon as new workload arises GPU wakes up automatically as well.
40 *
41 * There are different RC6 modes available in Intel GPU, which differentiate
42 * among each other with the latency required to enter and leave RC6 and
43 * voltage consumed by the GPU in different states.
44 *
45 * The combination of the following flags define which states GPU is allowed
46 * to enter, while RC6 is the normal RC6 state, RC6p is the deep RC6, and
47 * RC6pp is deepest RC6. Their support by hardware varies according to the
48 * GPU, BIOS, chipset and platform. RC6 is usually the safest one and the one
49 * which brings the most power savings; deeper states save more power, but
50 * require higher latency to switch to and wake up.
51 */
52 #define INTEL_RC6_ENABLE (1<<0)
53 #define INTEL_RC6p_ENABLE (1<<1)
54 #define INTEL_RC6pp_ENABLE (1<<2)
55
56 /* FBC, or Frame Buffer Compression, is a technique employed to compress the
57 * framebuffer contents in-memory, aiming at reducing the required bandwidth
58 * during in-memory transfers and, therefore, reduce the power packet.
59 *
60 * The benefits of FBC are mostly visible with solid backgrounds and
61 * variation-less patterns.
62 *
63 * FBC-related functionality can be enabled by the means of the
64 * i915.i915_enable_fbc parameter
65 */
66
67 static void i8xx_disable_fbc(struct drm_device *dev)
68 {
69 struct drm_i915_private *dev_priv = dev->dev_private;
70 u32 fbc_ctl;
71
72 /* Disable compression */
73 fbc_ctl = I915_READ(FBC_CONTROL);
74 if ((fbc_ctl & FBC_CTL_EN) == 0)
75 return;
76
77 fbc_ctl &= ~FBC_CTL_EN;
78 I915_WRITE(FBC_CONTROL, fbc_ctl);
79
80 /* Wait for compressing bit to clear */
81 if (wait_for((I915_READ(FBC_STATUS) & FBC_STAT_COMPRESSING) == 0, 10)) {
82 DRM_DEBUG_KMS("FBC idle timed out\n");
83 return;
84 }
85
86 DRM_DEBUG_KMS("disabled FBC\n");
87 }
88
89 static void i8xx_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
90 {
91 struct drm_device *dev = crtc->dev;
92 struct drm_i915_private *dev_priv = dev->dev_private;
93 struct drm_framebuffer *fb = crtc->fb;
94 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
95 struct drm_i915_gem_object *obj = intel_fb->obj;
96 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
97 int cfb_pitch;
98 int plane, i;
99 u32 fbc_ctl, fbc_ctl2;
100
101 cfb_pitch = dev_priv->fbc.size / FBC_LL_SIZE;
102 if (fb->pitches[0] < cfb_pitch)
103 cfb_pitch = fb->pitches[0];
104
105 /* FBC_CTL wants 64B units */
106 cfb_pitch = (cfb_pitch / 64) - 1;
107 plane = intel_crtc->plane == 0 ? FBC_CTL_PLANEA : FBC_CTL_PLANEB;
108
109 /* Clear old tags */
110 for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++)
111 I915_WRITE(FBC_TAG + (i * 4), 0);
112
113 /* Set it up... */
114 fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE;
115 fbc_ctl2 |= plane;
116 I915_WRITE(FBC_CONTROL2, fbc_ctl2);
117 I915_WRITE(FBC_FENCE_OFF, crtc->y);
118
119 /* enable it... */
120 fbc_ctl = FBC_CTL_EN | FBC_CTL_PERIODIC;
121 if (IS_I945GM(dev))
122 fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */
123 fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT;
124 fbc_ctl |= (interval & 0x2fff) << FBC_CTL_INTERVAL_SHIFT;
125 fbc_ctl |= obj->fence_reg;
126 I915_WRITE(FBC_CONTROL, fbc_ctl);
127
128 DRM_DEBUG_KMS("enabled FBC, pitch %d, yoff %d, plane %c, ",
129 cfb_pitch, crtc->y, plane_name(intel_crtc->plane));
130 }
131
132 static bool i8xx_fbc_enabled(struct drm_device *dev)
133 {
134 struct drm_i915_private *dev_priv = dev->dev_private;
135
136 return I915_READ(FBC_CONTROL) & FBC_CTL_EN;
137 }
138
139 static void g4x_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
140 {
141 struct drm_device *dev = crtc->dev;
142 struct drm_i915_private *dev_priv = dev->dev_private;
143 struct drm_framebuffer *fb = crtc->fb;
144 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
145 struct drm_i915_gem_object *obj = intel_fb->obj;
146 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
147 int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB;
148 unsigned long stall_watermark = 200;
149 u32 dpfc_ctl;
150
151 dpfc_ctl = plane | DPFC_SR_EN | DPFC_CTL_LIMIT_1X;
152 dpfc_ctl |= DPFC_CTL_FENCE_EN | obj->fence_reg;
153 I915_WRITE(DPFC_CHICKEN, DPFC_HT_MODIFY);
154
155 I915_WRITE(DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN |
156 (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
157 (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
158 I915_WRITE(DPFC_FENCE_YOFF, crtc->y);
159
160 /* enable it... */
161 I915_WRITE(DPFC_CONTROL, I915_READ(DPFC_CONTROL) | DPFC_CTL_EN);
162
163 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane));
164 }
165
166 static void g4x_disable_fbc(struct drm_device *dev)
167 {
168 struct drm_i915_private *dev_priv = dev->dev_private;
169 u32 dpfc_ctl;
170
171 /* Disable compression */
172 dpfc_ctl = I915_READ(DPFC_CONTROL);
173 if (dpfc_ctl & DPFC_CTL_EN) {
174 dpfc_ctl &= ~DPFC_CTL_EN;
175 I915_WRITE(DPFC_CONTROL, dpfc_ctl);
176
177 DRM_DEBUG_KMS("disabled FBC\n");
178 }
179 }
180
181 static bool g4x_fbc_enabled(struct drm_device *dev)
182 {
183 struct drm_i915_private *dev_priv = dev->dev_private;
184
185 return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN;
186 }
187
188 static void sandybridge_blit_fbc_update(struct drm_device *dev)
189 {
190 struct drm_i915_private *dev_priv = dev->dev_private;
191 u32 blt_ecoskpd;
192
193 /* Make sure blitter notifies FBC of writes */
194 gen6_gt_force_wake_get(dev_priv);
195 blt_ecoskpd = I915_READ(GEN6_BLITTER_ECOSKPD);
196 blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY <<
197 GEN6_BLITTER_LOCK_SHIFT;
198 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
199 blt_ecoskpd |= GEN6_BLITTER_FBC_NOTIFY;
200 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
201 blt_ecoskpd &= ~(GEN6_BLITTER_FBC_NOTIFY <<
202 GEN6_BLITTER_LOCK_SHIFT);
203 I915_WRITE(GEN6_BLITTER_ECOSKPD, blt_ecoskpd);
204 POSTING_READ(GEN6_BLITTER_ECOSKPD);
205 gen6_gt_force_wake_put(dev_priv);
206 }
207
208 static void ironlake_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
209 {
210 struct drm_device *dev = crtc->dev;
211 struct drm_i915_private *dev_priv = dev->dev_private;
212 struct drm_framebuffer *fb = crtc->fb;
213 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
214 struct drm_i915_gem_object *obj = intel_fb->obj;
215 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
216 int plane = intel_crtc->plane == 0 ? DPFC_CTL_PLANEA : DPFC_CTL_PLANEB;
217 unsigned long stall_watermark = 200;
218 u32 dpfc_ctl;
219
220 dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
221 dpfc_ctl &= DPFC_RESERVED;
222 dpfc_ctl |= (plane | DPFC_CTL_LIMIT_1X);
223 /* Set persistent mode for front-buffer rendering, ala X. */
224 dpfc_ctl |= DPFC_CTL_PERSISTENT_MODE;
225 dpfc_ctl |= (DPFC_CTL_FENCE_EN | obj->fence_reg);
226 I915_WRITE(ILK_DPFC_CHICKEN, DPFC_HT_MODIFY);
227
228 I915_WRITE(ILK_DPFC_RECOMP_CTL, DPFC_RECOMP_STALL_EN |
229 (stall_watermark << DPFC_RECOMP_STALL_WM_SHIFT) |
230 (interval << DPFC_RECOMP_TIMER_COUNT_SHIFT));
231 I915_WRITE(ILK_DPFC_FENCE_YOFF, crtc->y);
232 I915_WRITE(ILK_FBC_RT_BASE, i915_gem_obj_ggtt_offset(obj) | ILK_FBC_RT_VALID);
233 /* enable it... */
234 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN);
235
236 if (IS_GEN6(dev)) {
237 I915_WRITE(SNB_DPFC_CTL_SA,
238 SNB_CPU_FENCE_ENABLE | obj->fence_reg);
239 I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y);
240 sandybridge_blit_fbc_update(dev);
241 }
242
243 DRM_DEBUG_KMS("enabled fbc on plane %c\n", plane_name(intel_crtc->plane));
244 }
245
246 static void ironlake_disable_fbc(struct drm_device *dev)
247 {
248 struct drm_i915_private *dev_priv = dev->dev_private;
249 u32 dpfc_ctl;
250
251 /* Disable compression */
252 dpfc_ctl = I915_READ(ILK_DPFC_CONTROL);
253 if (dpfc_ctl & DPFC_CTL_EN) {
254 dpfc_ctl &= ~DPFC_CTL_EN;
255 I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl);
256
257 DRM_DEBUG_KMS("disabled FBC\n");
258 }
259 }
260
261 static bool ironlake_fbc_enabled(struct drm_device *dev)
262 {
263 struct drm_i915_private *dev_priv = dev->dev_private;
264
265 return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN;
266 }
267
268 static void gen7_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
269 {
270 struct drm_device *dev = crtc->dev;
271 struct drm_i915_private *dev_priv = dev->dev_private;
272 struct drm_framebuffer *fb = crtc->fb;
273 struct intel_framebuffer *intel_fb = to_intel_framebuffer(fb);
274 struct drm_i915_gem_object *obj = intel_fb->obj;
275 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
276
277 I915_WRITE(IVB_FBC_RT_BASE, i915_gem_obj_ggtt_offset(obj));
278
279 I915_WRITE(ILK_DPFC_CONTROL, DPFC_CTL_EN | DPFC_CTL_LIMIT_1X |
280 IVB_DPFC_CTL_FENCE_EN |
281 intel_crtc->plane << IVB_DPFC_CTL_PLANE_SHIFT);
282
283 if (IS_IVYBRIDGE(dev)) {
284 /* WaFbcAsynchFlipDisableFbcQueue:ivb */
285 I915_WRITE(ILK_DISPLAY_CHICKEN1, ILK_FBCQ_DIS);
286 } else {
287 /* WaFbcAsynchFlipDisableFbcQueue:hsw */
288 I915_WRITE(HSW_PIPE_SLICE_CHICKEN_1(intel_crtc->pipe),
289 HSW_BYPASS_FBC_QUEUE);
290 }
291
292 I915_WRITE(SNB_DPFC_CTL_SA,
293 SNB_CPU_FENCE_ENABLE | obj->fence_reg);
294 I915_WRITE(DPFC_CPU_FENCE_OFFSET, crtc->y);
295
296 sandybridge_blit_fbc_update(dev);
297
298 DRM_DEBUG_KMS("enabled fbc on plane %d\n", intel_crtc->plane);
299 }
300
301 bool intel_fbc_enabled(struct drm_device *dev)
302 {
303 struct drm_i915_private *dev_priv = dev->dev_private;
304
305 if (!dev_priv->display.fbc_enabled)
306 return false;
307
308 return dev_priv->display.fbc_enabled(dev);
309 }
310
311 static void intel_fbc_work_fn(struct work_struct *__work)
312 {
313 struct intel_fbc_work *work =
314 container_of(to_delayed_work(__work),
315 struct intel_fbc_work, work);
316 struct drm_device *dev = work->crtc->dev;
317 struct drm_i915_private *dev_priv = dev->dev_private;
318
319 mutex_lock(&dev->struct_mutex);
320 if (work == dev_priv->fbc.fbc_work) {
321 /* Double check that we haven't switched fb without cancelling
322 * the prior work.
323 */
324 if (work->crtc->fb == work->fb) {
325 dev_priv->display.enable_fbc(work->crtc,
326 work->interval);
327
328 dev_priv->fbc.plane = to_intel_crtc(work->crtc)->plane;
329 dev_priv->fbc.fb_id = work->crtc->fb->base.id;
330 dev_priv->fbc.y = work->crtc->y;
331 }
332
333 dev_priv->fbc.fbc_work = NULL;
334 }
335 mutex_unlock(&dev->struct_mutex);
336
337 kfree(work);
338 }
339
340 static void intel_cancel_fbc_work(struct drm_i915_private *dev_priv)
341 {
342 if (dev_priv->fbc.fbc_work == NULL)
343 return;
344
345 DRM_DEBUG_KMS("cancelling pending FBC enable\n");
346
347 /* Synchronisation is provided by struct_mutex and checking of
348 * dev_priv->fbc.fbc_work, so we can perform the cancellation
349 * entirely asynchronously.
350 */
351 if (cancel_delayed_work(&dev_priv->fbc.fbc_work->work))
352 /* tasklet was killed before being run, clean up */
353 kfree(dev_priv->fbc.fbc_work);
354
355 /* Mark the work as no longer wanted so that if it does
356 * wake-up (because the work was already running and waiting
357 * for our mutex), it will discover that is no longer
358 * necessary to run.
359 */
360 dev_priv->fbc.fbc_work = NULL;
361 }
362
363 static void intel_enable_fbc(struct drm_crtc *crtc, unsigned long interval)
364 {
365 struct intel_fbc_work *work;
366 struct drm_device *dev = crtc->dev;
367 struct drm_i915_private *dev_priv = dev->dev_private;
368
369 if (!dev_priv->display.enable_fbc)
370 return;
371
372 intel_cancel_fbc_work(dev_priv);
373
374 work = kzalloc(sizeof(*work), GFP_KERNEL);
375 if (work == NULL) {
376 DRM_ERROR("Failed to allocate FBC work structure\n");
377 dev_priv->display.enable_fbc(crtc, interval);
378 return;
379 }
380
381 work->crtc = crtc;
382 work->fb = crtc->fb;
383 work->interval = interval;
384 INIT_DELAYED_WORK(&work->work, intel_fbc_work_fn);
385
386 dev_priv->fbc.fbc_work = work;
387
388 /* Delay the actual enabling to let pageflipping cease and the
389 * display to settle before starting the compression. Note that
390 * this delay also serves a second purpose: it allows for a
391 * vblank to pass after disabling the FBC before we attempt
392 * to modify the control registers.
393 *
394 * A more complicated solution would involve tracking vblanks
395 * following the termination of the page-flipping sequence
396 * and indeed performing the enable as a co-routine and not
397 * waiting synchronously upon the vblank.
398 *
399 * WaFbcWaitForVBlankBeforeEnable:ilk,snb
400 */
401 schedule_delayed_work(&work->work, msecs_to_jiffies(50));
402 }
403
404 void intel_disable_fbc(struct drm_device *dev)
405 {
406 struct drm_i915_private *dev_priv = dev->dev_private;
407
408 intel_cancel_fbc_work(dev_priv);
409
410 if (!dev_priv->display.disable_fbc)
411 return;
412
413 dev_priv->display.disable_fbc(dev);
414 dev_priv->fbc.plane = -1;
415 }
416
417 static bool set_no_fbc_reason(struct drm_i915_private *dev_priv,
418 enum no_fbc_reason reason)
419 {
420 if (dev_priv->fbc.no_fbc_reason == reason)
421 return false;
422
423 dev_priv->fbc.no_fbc_reason = reason;
424 return true;
425 }
426
427 /**
428 * intel_update_fbc - enable/disable FBC as needed
429 * @dev: the drm_device
430 *
431 * Set up the framebuffer compression hardware at mode set time. We
432 * enable it if possible:
433 * - plane A only (on pre-965)
434 * - no pixel mulitply/line duplication
435 * - no alpha buffer discard
436 * - no dual wide
437 * - framebuffer <= max_hdisplay in width, max_vdisplay in height
438 *
439 * We can't assume that any compression will take place (worst case),
440 * so the compressed buffer has to be the same size as the uncompressed
441 * one. It also must reside (along with the line length buffer) in
442 * stolen memory.
443 *
444 * We need to enable/disable FBC on a global basis.
445 */
446 void intel_update_fbc(struct drm_device *dev)
447 {
448 struct drm_i915_private *dev_priv = dev->dev_private;
449 struct drm_crtc *crtc = NULL, *tmp_crtc;
450 struct intel_crtc *intel_crtc;
451 struct drm_framebuffer *fb;
452 struct intel_framebuffer *intel_fb;
453 struct drm_i915_gem_object *obj;
454 const struct drm_display_mode *adjusted_mode;
455 unsigned int max_width, max_height;
456
457 if (!I915_HAS_FBC(dev)) {
458 set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED);
459 return;
460 }
461
462 if (!i915_powersave) {
463 if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM))
464 DRM_DEBUG_KMS("fbc disabled per module param\n");
465 return;
466 }
467
468 /*
469 * If FBC is already on, we just have to verify that we can
470 * keep it that way...
471 * Need to disable if:
472 * - more than one pipe is active
473 * - changing FBC params (stride, fence, mode)
474 * - new fb is too large to fit in compressed buffer
475 * - going to an unsupported config (interlace, pixel multiply, etc.)
476 */
477 list_for_each_entry(tmp_crtc, &dev->mode_config.crtc_list, head) {
478 if (intel_crtc_active(tmp_crtc) &&
479 to_intel_crtc(tmp_crtc)->primary_enabled) {
480 if (crtc) {
481 if (set_no_fbc_reason(dev_priv, FBC_MULTIPLE_PIPES))
482 DRM_DEBUG_KMS("more than one pipe active, disabling compression\n");
483 goto out_disable;
484 }
485 crtc = tmp_crtc;
486 }
487 }
488
489 if (!crtc || crtc->fb == NULL) {
490 if (set_no_fbc_reason(dev_priv, FBC_NO_OUTPUT))
491 DRM_DEBUG_KMS("no output, disabling\n");
492 goto out_disable;
493 }
494
495 intel_crtc = to_intel_crtc(crtc);
496 fb = crtc->fb;
497 intel_fb = to_intel_framebuffer(fb);
498 obj = intel_fb->obj;
499 adjusted_mode = &intel_crtc->config.adjusted_mode;
500
501 if (i915_enable_fbc < 0 &&
502 INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev)) {
503 if (set_no_fbc_reason(dev_priv, FBC_CHIP_DEFAULT))
504 DRM_DEBUG_KMS("disabled per chip default\n");
505 goto out_disable;
506 }
507 if (!i915_enable_fbc) {
508 if (set_no_fbc_reason(dev_priv, FBC_MODULE_PARAM))
509 DRM_DEBUG_KMS("fbc disabled per module param\n");
510 goto out_disable;
511 }
512 if ((adjusted_mode->flags & DRM_MODE_FLAG_INTERLACE) ||
513 (adjusted_mode->flags & DRM_MODE_FLAG_DBLSCAN)) {
514 if (set_no_fbc_reason(dev_priv, FBC_UNSUPPORTED_MODE))
515 DRM_DEBUG_KMS("mode incompatible with compression, "
516 "disabling\n");
517 goto out_disable;
518 }
519
520 if (IS_G4X(dev) || INTEL_INFO(dev)->gen >= 5) {
521 max_width = 4096;
522 max_height = 2048;
523 } else {
524 max_width = 2048;
525 max_height = 1536;
526 }
527 if (intel_crtc->config.pipe_src_w > max_width ||
528 intel_crtc->config.pipe_src_h > max_height) {
529 if (set_no_fbc_reason(dev_priv, FBC_MODE_TOO_LARGE))
530 DRM_DEBUG_KMS("mode too large for compression, disabling\n");
531 goto out_disable;
532 }
533 if ((IS_I915GM(dev) || IS_I945GM(dev) || IS_HASWELL(dev)) &&
534 intel_crtc->plane != 0) {
535 if (set_no_fbc_reason(dev_priv, FBC_BAD_PLANE))
536 DRM_DEBUG_KMS("plane not 0, disabling compression\n");
537 goto out_disable;
538 }
539
540 /* The use of a CPU fence is mandatory in order to detect writes
541 * by the CPU to the scanout and trigger updates to the FBC.
542 */
543 if (obj->tiling_mode != I915_TILING_X ||
544 obj->fence_reg == I915_FENCE_REG_NONE) {
545 if (set_no_fbc_reason(dev_priv, FBC_NOT_TILED))
546 DRM_DEBUG_KMS("framebuffer not tiled or fenced, disabling compression\n");
547 goto out_disable;
548 }
549
550 /* If the kernel debugger is active, always disable compression */
551 if (in_dbg_master())
552 goto out_disable;
553
554 if (i915_gem_stolen_setup_compression(dev, intel_fb->obj->base.size)) {
555 if (set_no_fbc_reason(dev_priv, FBC_STOLEN_TOO_SMALL))
556 DRM_DEBUG_KMS("framebuffer too large, disabling compression\n");
557 goto out_disable;
558 }
559
560 /* If the scanout has not changed, don't modify the FBC settings.
561 * Note that we make the fundamental assumption that the fb->obj
562 * cannot be unpinned (and have its GTT offset and fence revoked)
563 * without first being decoupled from the scanout and FBC disabled.
564 */
565 if (dev_priv->fbc.plane == intel_crtc->plane &&
566 dev_priv->fbc.fb_id == fb->base.id &&
567 dev_priv->fbc.y == crtc->y)
568 return;
569
570 if (intel_fbc_enabled(dev)) {
571 /* We update FBC along two paths, after changing fb/crtc
572 * configuration (modeswitching) and after page-flipping
573 * finishes. For the latter, we know that not only did
574 * we disable the FBC at the start of the page-flip
575 * sequence, but also more than one vblank has passed.
576 *
577 * For the former case of modeswitching, it is possible
578 * to switch between two FBC valid configurations
579 * instantaneously so we do need to disable the FBC
580 * before we can modify its control registers. We also
581 * have to wait for the next vblank for that to take
582 * effect. However, since we delay enabling FBC we can
583 * assume that a vblank has passed since disabling and
584 * that we can safely alter the registers in the deferred
585 * callback.
586 *
587 * In the scenario that we go from a valid to invalid
588 * and then back to valid FBC configuration we have
589 * no strict enforcement that a vblank occurred since
590 * disabling the FBC. However, along all current pipe
591 * disabling paths we do need to wait for a vblank at
592 * some point. And we wait before enabling FBC anyway.
593 */
594 DRM_DEBUG_KMS("disabling active FBC for update\n");
595 intel_disable_fbc(dev);
596 }
597
598 intel_enable_fbc(crtc, 500);
599 dev_priv->fbc.no_fbc_reason = FBC_OK;
600 return;
601
602 out_disable:
603 /* Multiple disables should be harmless */
604 if (intel_fbc_enabled(dev)) {
605 DRM_DEBUG_KMS("unsupported config, disabling FBC\n");
606 intel_disable_fbc(dev);
607 }
608 i915_gem_stolen_cleanup_compression(dev);
609 }
610
611 static void i915_pineview_get_mem_freq(struct drm_device *dev)
612 {
613 drm_i915_private_t *dev_priv = dev->dev_private;
614 u32 tmp;
615
616 tmp = I915_READ(CLKCFG);
617
618 switch (tmp & CLKCFG_FSB_MASK) {
619 case CLKCFG_FSB_533:
620 dev_priv->fsb_freq = 533; /* 133*4 */
621 break;
622 case CLKCFG_FSB_800:
623 dev_priv->fsb_freq = 800; /* 200*4 */
624 break;
625 case CLKCFG_FSB_667:
626 dev_priv->fsb_freq = 667; /* 167*4 */
627 break;
628 case CLKCFG_FSB_400:
629 dev_priv->fsb_freq = 400; /* 100*4 */
630 break;
631 }
632
633 switch (tmp & CLKCFG_MEM_MASK) {
634 case CLKCFG_MEM_533:
635 dev_priv->mem_freq = 533;
636 break;
637 case CLKCFG_MEM_667:
638 dev_priv->mem_freq = 667;
639 break;
640 case CLKCFG_MEM_800:
641 dev_priv->mem_freq = 800;
642 break;
643 }
644
645 /* detect pineview DDR3 setting */
646 tmp = I915_READ(CSHRDDR3CTL);
647 dev_priv->is_ddr3 = (tmp & CSHRDDR3CTL_DDR3) ? 1 : 0;
648 }
649
650 static void i915_ironlake_get_mem_freq(struct drm_device *dev)
651 {
652 drm_i915_private_t *dev_priv = dev->dev_private;
653 u16 ddrpll, csipll;
654
655 ddrpll = I915_READ16(DDRMPLL1);
656 csipll = I915_READ16(CSIPLL0);
657
658 switch (ddrpll & 0xff) {
659 case 0xc:
660 dev_priv->mem_freq = 800;
661 break;
662 case 0x10:
663 dev_priv->mem_freq = 1066;
664 break;
665 case 0x14:
666 dev_priv->mem_freq = 1333;
667 break;
668 case 0x18:
669 dev_priv->mem_freq = 1600;
670 break;
671 default:
672 DRM_DEBUG_DRIVER("unknown memory frequency 0x%02x\n",
673 ddrpll & 0xff);
674 dev_priv->mem_freq = 0;
675 break;
676 }
677
678 dev_priv->ips.r_t = dev_priv->mem_freq;
679
680 switch (csipll & 0x3ff) {
681 case 0x00c:
682 dev_priv->fsb_freq = 3200;
683 break;
684 case 0x00e:
685 dev_priv->fsb_freq = 3733;
686 break;
687 case 0x010:
688 dev_priv->fsb_freq = 4266;
689 break;
690 case 0x012:
691 dev_priv->fsb_freq = 4800;
692 break;
693 case 0x014:
694 dev_priv->fsb_freq = 5333;
695 break;
696 case 0x016:
697 dev_priv->fsb_freq = 5866;
698 break;
699 case 0x018:
700 dev_priv->fsb_freq = 6400;
701 break;
702 default:
703 DRM_DEBUG_DRIVER("unknown fsb frequency 0x%04x\n",
704 csipll & 0x3ff);
705 dev_priv->fsb_freq = 0;
706 break;
707 }
708
709 if (dev_priv->fsb_freq == 3200) {
710 dev_priv->ips.c_m = 0;
711 } else if (dev_priv->fsb_freq > 3200 && dev_priv->fsb_freq <= 4800) {
712 dev_priv->ips.c_m = 1;
713 } else {
714 dev_priv->ips.c_m = 2;
715 }
716 }
717
718 static const struct cxsr_latency cxsr_latency_table[] = {
719 {1, 0, 800, 400, 3382, 33382, 3983, 33983}, /* DDR2-400 SC */
720 {1, 0, 800, 667, 3354, 33354, 3807, 33807}, /* DDR2-667 SC */
721 {1, 0, 800, 800, 3347, 33347, 3763, 33763}, /* DDR2-800 SC */
722 {1, 1, 800, 667, 6420, 36420, 6873, 36873}, /* DDR3-667 SC */
723 {1, 1, 800, 800, 5902, 35902, 6318, 36318}, /* DDR3-800 SC */
724
725 {1, 0, 667, 400, 3400, 33400, 4021, 34021}, /* DDR2-400 SC */
726 {1, 0, 667, 667, 3372, 33372, 3845, 33845}, /* DDR2-667 SC */
727 {1, 0, 667, 800, 3386, 33386, 3822, 33822}, /* DDR2-800 SC */
728 {1, 1, 667, 667, 6438, 36438, 6911, 36911}, /* DDR3-667 SC */
729 {1, 1, 667, 800, 5941, 35941, 6377, 36377}, /* DDR3-800 SC */
730
731 {1, 0, 400, 400, 3472, 33472, 4173, 34173}, /* DDR2-400 SC */
732 {1, 0, 400, 667, 3443, 33443, 3996, 33996}, /* DDR2-667 SC */
733 {1, 0, 400, 800, 3430, 33430, 3946, 33946}, /* DDR2-800 SC */
734 {1, 1, 400, 667, 6509, 36509, 7062, 37062}, /* DDR3-667 SC */
735 {1, 1, 400, 800, 5985, 35985, 6501, 36501}, /* DDR3-800 SC */
736
737 {0, 0, 800, 400, 3438, 33438, 4065, 34065}, /* DDR2-400 SC */
738 {0, 0, 800, 667, 3410, 33410, 3889, 33889}, /* DDR2-667 SC */
739 {0, 0, 800, 800, 3403, 33403, 3845, 33845}, /* DDR2-800 SC */
740 {0, 1, 800, 667, 6476, 36476, 6955, 36955}, /* DDR3-667 SC */
741 {0, 1, 800, 800, 5958, 35958, 6400, 36400}, /* DDR3-800 SC */
742
743 {0, 0, 667, 400, 3456, 33456, 4103, 34106}, /* DDR2-400 SC */
744 {0, 0, 667, 667, 3428, 33428, 3927, 33927}, /* DDR2-667 SC */
745 {0, 0, 667, 800, 3443, 33443, 3905, 33905}, /* DDR2-800 SC */
746 {0, 1, 667, 667, 6494, 36494, 6993, 36993}, /* DDR3-667 SC */
747 {0, 1, 667, 800, 5998, 35998, 6460, 36460}, /* DDR3-800 SC */
748
749 {0, 0, 400, 400, 3528, 33528, 4255, 34255}, /* DDR2-400 SC */
750 {0, 0, 400, 667, 3500, 33500, 4079, 34079}, /* DDR2-667 SC */
751 {0, 0, 400, 800, 3487, 33487, 4029, 34029}, /* DDR2-800 SC */
752 {0, 1, 400, 667, 6566, 36566, 7145, 37145}, /* DDR3-667 SC */
753 {0, 1, 400, 800, 6042, 36042, 6584, 36584}, /* DDR3-800 SC */
754 };
755
756 static const struct cxsr_latency *intel_get_cxsr_latency(int is_desktop,
757 int is_ddr3,
758 int fsb,
759 int mem)
760 {
761 const struct cxsr_latency *latency;
762 int i;
763
764 if (fsb == 0 || mem == 0)
765 return NULL;
766
767 for (i = 0; i < ARRAY_SIZE(cxsr_latency_table); i++) {
768 latency = &cxsr_latency_table[i];
769 if (is_desktop == latency->is_desktop &&
770 is_ddr3 == latency->is_ddr3 &&
771 fsb == latency->fsb_freq && mem == latency->mem_freq)
772 return latency;
773 }
774
775 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
776
777 return NULL;
778 }
779
780 static void pineview_disable_cxsr(struct drm_device *dev)
781 {
782 struct drm_i915_private *dev_priv = dev->dev_private;
783
784 /* deactivate cxsr */
785 I915_WRITE(DSPFW3, I915_READ(DSPFW3) & ~PINEVIEW_SELF_REFRESH_EN);
786 }
787
788 /*
789 * Latency for FIFO fetches is dependent on several factors:
790 * - memory configuration (speed, channels)
791 * - chipset
792 * - current MCH state
793 * It can be fairly high in some situations, so here we assume a fairly
794 * pessimal value. It's a tradeoff between extra memory fetches (if we
795 * set this value too high, the FIFO will fetch frequently to stay full)
796 * and power consumption (set it too low to save power and we might see
797 * FIFO underruns and display "flicker").
798 *
799 * A value of 5us seems to be a good balance; safe for very low end
800 * platforms but not overly aggressive on lower latency configs.
801 */
802 static const int latency_ns = 5000;
803
804 static int i9xx_get_fifo_size(struct drm_device *dev, int plane)
805 {
806 struct drm_i915_private *dev_priv = dev->dev_private;
807 uint32_t dsparb = I915_READ(DSPARB);
808 int size;
809
810 size = dsparb & 0x7f;
811 if (plane)
812 size = ((dsparb >> DSPARB_CSTART_SHIFT) & 0x7f) - size;
813
814 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
815 plane ? "B" : "A", size);
816
817 return size;
818 }
819
820 static int i85x_get_fifo_size(struct drm_device *dev, int plane)
821 {
822 struct drm_i915_private *dev_priv = dev->dev_private;
823 uint32_t dsparb = I915_READ(DSPARB);
824 int size;
825
826 size = dsparb & 0x1ff;
827 if (plane)
828 size = ((dsparb >> DSPARB_BEND_SHIFT) & 0x1ff) - size;
829 size >>= 1; /* Convert to cachelines */
830
831 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
832 plane ? "B" : "A", size);
833
834 return size;
835 }
836
837 static int i845_get_fifo_size(struct drm_device *dev, int plane)
838 {
839 struct drm_i915_private *dev_priv = dev->dev_private;
840 uint32_t dsparb = I915_READ(DSPARB);
841 int size;
842
843 size = dsparb & 0x7f;
844 size >>= 2; /* Convert to cachelines */
845
846 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
847 plane ? "B" : "A",
848 size);
849
850 return size;
851 }
852
853 static int i830_get_fifo_size(struct drm_device *dev, int plane)
854 {
855 struct drm_i915_private *dev_priv = dev->dev_private;
856 uint32_t dsparb = I915_READ(DSPARB);
857 int size;
858
859 size = dsparb & 0x7f;
860 size >>= 1; /* Convert to cachelines */
861
862 DRM_DEBUG_KMS("FIFO size - (0x%08x) %s: %d\n", dsparb,
863 plane ? "B" : "A", size);
864
865 return size;
866 }
867
868 /* Pineview has different values for various configs */
869 static const struct intel_watermark_params pineview_display_wm = {
870 PINEVIEW_DISPLAY_FIFO,
871 PINEVIEW_MAX_WM,
872 PINEVIEW_DFT_WM,
873 PINEVIEW_GUARD_WM,
874 PINEVIEW_FIFO_LINE_SIZE
875 };
876 static const struct intel_watermark_params pineview_display_hplloff_wm = {
877 PINEVIEW_DISPLAY_FIFO,
878 PINEVIEW_MAX_WM,
879 PINEVIEW_DFT_HPLLOFF_WM,
880 PINEVIEW_GUARD_WM,
881 PINEVIEW_FIFO_LINE_SIZE
882 };
883 static const struct intel_watermark_params pineview_cursor_wm = {
884 PINEVIEW_CURSOR_FIFO,
885 PINEVIEW_CURSOR_MAX_WM,
886 PINEVIEW_CURSOR_DFT_WM,
887 PINEVIEW_CURSOR_GUARD_WM,
888 PINEVIEW_FIFO_LINE_SIZE,
889 };
890 static const struct intel_watermark_params pineview_cursor_hplloff_wm = {
891 PINEVIEW_CURSOR_FIFO,
892 PINEVIEW_CURSOR_MAX_WM,
893 PINEVIEW_CURSOR_DFT_WM,
894 PINEVIEW_CURSOR_GUARD_WM,
895 PINEVIEW_FIFO_LINE_SIZE
896 };
897 static const struct intel_watermark_params g4x_wm_info = {
898 G4X_FIFO_SIZE,
899 G4X_MAX_WM,
900 G4X_MAX_WM,
901 2,
902 G4X_FIFO_LINE_SIZE,
903 };
904 static const struct intel_watermark_params g4x_cursor_wm_info = {
905 I965_CURSOR_FIFO,
906 I965_CURSOR_MAX_WM,
907 I965_CURSOR_DFT_WM,
908 2,
909 G4X_FIFO_LINE_SIZE,
910 };
911 static const struct intel_watermark_params valleyview_wm_info = {
912 VALLEYVIEW_FIFO_SIZE,
913 VALLEYVIEW_MAX_WM,
914 VALLEYVIEW_MAX_WM,
915 2,
916 G4X_FIFO_LINE_SIZE,
917 };
918 static const struct intel_watermark_params valleyview_cursor_wm_info = {
919 I965_CURSOR_FIFO,
920 VALLEYVIEW_CURSOR_MAX_WM,
921 I965_CURSOR_DFT_WM,
922 2,
923 G4X_FIFO_LINE_SIZE,
924 };
925 static const struct intel_watermark_params i965_cursor_wm_info = {
926 I965_CURSOR_FIFO,
927 I965_CURSOR_MAX_WM,
928 I965_CURSOR_DFT_WM,
929 2,
930 I915_FIFO_LINE_SIZE,
931 };
932 static const struct intel_watermark_params i945_wm_info = {
933 I945_FIFO_SIZE,
934 I915_MAX_WM,
935 1,
936 2,
937 I915_FIFO_LINE_SIZE
938 };
939 static const struct intel_watermark_params i915_wm_info = {
940 I915_FIFO_SIZE,
941 I915_MAX_WM,
942 1,
943 2,
944 I915_FIFO_LINE_SIZE
945 };
946 static const struct intel_watermark_params i855_wm_info = {
947 I855GM_FIFO_SIZE,
948 I915_MAX_WM,
949 1,
950 2,
951 I830_FIFO_LINE_SIZE
952 };
953 static const struct intel_watermark_params i830_wm_info = {
954 I830_FIFO_SIZE,
955 I915_MAX_WM,
956 1,
957 2,
958 I830_FIFO_LINE_SIZE
959 };
960
961 static const struct intel_watermark_params ironlake_display_wm_info = {
962 ILK_DISPLAY_FIFO,
963 ILK_DISPLAY_MAXWM,
964 ILK_DISPLAY_DFTWM,
965 2,
966 ILK_FIFO_LINE_SIZE
967 };
968 static const struct intel_watermark_params ironlake_cursor_wm_info = {
969 ILK_CURSOR_FIFO,
970 ILK_CURSOR_MAXWM,
971 ILK_CURSOR_DFTWM,
972 2,
973 ILK_FIFO_LINE_SIZE
974 };
975 static const struct intel_watermark_params ironlake_display_srwm_info = {
976 ILK_DISPLAY_SR_FIFO,
977 ILK_DISPLAY_MAX_SRWM,
978 ILK_DISPLAY_DFT_SRWM,
979 2,
980 ILK_FIFO_LINE_SIZE
981 };
982 static const struct intel_watermark_params ironlake_cursor_srwm_info = {
983 ILK_CURSOR_SR_FIFO,
984 ILK_CURSOR_MAX_SRWM,
985 ILK_CURSOR_DFT_SRWM,
986 2,
987 ILK_FIFO_LINE_SIZE
988 };
989
990 static const struct intel_watermark_params sandybridge_display_wm_info = {
991 SNB_DISPLAY_FIFO,
992 SNB_DISPLAY_MAXWM,
993 SNB_DISPLAY_DFTWM,
994 2,
995 SNB_FIFO_LINE_SIZE
996 };
997 static const struct intel_watermark_params sandybridge_cursor_wm_info = {
998 SNB_CURSOR_FIFO,
999 SNB_CURSOR_MAXWM,
1000 SNB_CURSOR_DFTWM,
1001 2,
1002 SNB_FIFO_LINE_SIZE
1003 };
1004 static const struct intel_watermark_params sandybridge_display_srwm_info = {
1005 SNB_DISPLAY_SR_FIFO,
1006 SNB_DISPLAY_MAX_SRWM,
1007 SNB_DISPLAY_DFT_SRWM,
1008 2,
1009 SNB_FIFO_LINE_SIZE
1010 };
1011 static const struct intel_watermark_params sandybridge_cursor_srwm_info = {
1012 SNB_CURSOR_SR_FIFO,
1013 SNB_CURSOR_MAX_SRWM,
1014 SNB_CURSOR_DFT_SRWM,
1015 2,
1016 SNB_FIFO_LINE_SIZE
1017 };
1018
1019
1020 /**
1021 * intel_calculate_wm - calculate watermark level
1022 * @clock_in_khz: pixel clock
1023 * @wm: chip FIFO params
1024 * @pixel_size: display pixel size
1025 * @latency_ns: memory latency for the platform
1026 *
1027 * Calculate the watermark level (the level at which the display plane will
1028 * start fetching from memory again). Each chip has a different display
1029 * FIFO size and allocation, so the caller needs to figure that out and pass
1030 * in the correct intel_watermark_params structure.
1031 *
1032 * As the pixel clock runs, the FIFO will be drained at a rate that depends
1033 * on the pixel size. When it reaches the watermark level, it'll start
1034 * fetching FIFO line sized based chunks from memory until the FIFO fills
1035 * past the watermark point. If the FIFO drains completely, a FIFO underrun
1036 * will occur, and a display engine hang could result.
1037 */
1038 static unsigned long intel_calculate_wm(unsigned long clock_in_khz,
1039 const struct intel_watermark_params *wm,
1040 int fifo_size,
1041 int pixel_size,
1042 unsigned long latency_ns)
1043 {
1044 long entries_required, wm_size;
1045
1046 /*
1047 * Note: we need to make sure we don't overflow for various clock &
1048 * latency values.
1049 * clocks go from a few thousand to several hundred thousand.
1050 * latency is usually a few thousand
1051 */
1052 entries_required = ((clock_in_khz / 1000) * pixel_size * latency_ns) /
1053 1000;
1054 entries_required = DIV_ROUND_UP(entries_required, wm->cacheline_size);
1055
1056 DRM_DEBUG_KMS("FIFO entries required for mode: %ld\n", entries_required);
1057
1058 wm_size = fifo_size - (entries_required + wm->guard_size);
1059
1060 DRM_DEBUG_KMS("FIFO watermark level: %ld\n", wm_size);
1061
1062 /* Don't promote wm_size to unsigned... */
1063 if (wm_size > (long)wm->max_wm)
1064 wm_size = wm->max_wm;
1065 if (wm_size <= 0)
1066 wm_size = wm->default_wm;
1067 return wm_size;
1068 }
1069
1070 static struct drm_crtc *single_enabled_crtc(struct drm_device *dev)
1071 {
1072 struct drm_crtc *crtc, *enabled = NULL;
1073
1074 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
1075 if (intel_crtc_active(crtc)) {
1076 if (enabled)
1077 return NULL;
1078 enabled = crtc;
1079 }
1080 }
1081
1082 return enabled;
1083 }
1084
1085 static void pineview_update_wm(struct drm_crtc *unused_crtc)
1086 {
1087 struct drm_device *dev = unused_crtc->dev;
1088 struct drm_i915_private *dev_priv = dev->dev_private;
1089 struct drm_crtc *crtc;
1090 const struct cxsr_latency *latency;
1091 u32 reg;
1092 unsigned long wm;
1093
1094 latency = intel_get_cxsr_latency(IS_PINEVIEW_G(dev), dev_priv->is_ddr3,
1095 dev_priv->fsb_freq, dev_priv->mem_freq);
1096 if (!latency) {
1097 DRM_DEBUG_KMS("Unknown FSB/MEM found, disable CxSR\n");
1098 pineview_disable_cxsr(dev);
1099 return;
1100 }
1101
1102 crtc = single_enabled_crtc(dev);
1103 if (crtc) {
1104 const struct drm_display_mode *adjusted_mode;
1105 int pixel_size = crtc->fb->bits_per_pixel / 8;
1106 int clock;
1107
1108 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1109 clock = adjusted_mode->crtc_clock;
1110
1111 /* Display SR */
1112 wm = intel_calculate_wm(clock, &pineview_display_wm,
1113 pineview_display_wm.fifo_size,
1114 pixel_size, latency->display_sr);
1115 reg = I915_READ(DSPFW1);
1116 reg &= ~DSPFW_SR_MASK;
1117 reg |= wm << DSPFW_SR_SHIFT;
1118 I915_WRITE(DSPFW1, reg);
1119 DRM_DEBUG_KMS("DSPFW1 register is %x\n", reg);
1120
1121 /* cursor SR */
1122 wm = intel_calculate_wm(clock, &pineview_cursor_wm,
1123 pineview_display_wm.fifo_size,
1124 pixel_size, latency->cursor_sr);
1125 reg = I915_READ(DSPFW3);
1126 reg &= ~DSPFW_CURSOR_SR_MASK;
1127 reg |= (wm & 0x3f) << DSPFW_CURSOR_SR_SHIFT;
1128 I915_WRITE(DSPFW3, reg);
1129
1130 /* Display HPLL off SR */
1131 wm = intel_calculate_wm(clock, &pineview_display_hplloff_wm,
1132 pineview_display_hplloff_wm.fifo_size,
1133 pixel_size, latency->display_hpll_disable);
1134 reg = I915_READ(DSPFW3);
1135 reg &= ~DSPFW_HPLL_SR_MASK;
1136 reg |= wm & DSPFW_HPLL_SR_MASK;
1137 I915_WRITE(DSPFW3, reg);
1138
1139 /* cursor HPLL off SR */
1140 wm = intel_calculate_wm(clock, &pineview_cursor_hplloff_wm,
1141 pineview_display_hplloff_wm.fifo_size,
1142 pixel_size, latency->cursor_hpll_disable);
1143 reg = I915_READ(DSPFW3);
1144 reg &= ~DSPFW_HPLL_CURSOR_MASK;
1145 reg |= (wm & 0x3f) << DSPFW_HPLL_CURSOR_SHIFT;
1146 I915_WRITE(DSPFW3, reg);
1147 DRM_DEBUG_KMS("DSPFW3 register is %x\n", reg);
1148
1149 /* activate cxsr */
1150 I915_WRITE(DSPFW3,
1151 I915_READ(DSPFW3) | PINEVIEW_SELF_REFRESH_EN);
1152 DRM_DEBUG_KMS("Self-refresh is enabled\n");
1153 } else {
1154 pineview_disable_cxsr(dev);
1155 DRM_DEBUG_KMS("Self-refresh is disabled\n");
1156 }
1157 }
1158
1159 static bool g4x_compute_wm0(struct drm_device *dev,
1160 int plane,
1161 const struct intel_watermark_params *display,
1162 int display_latency_ns,
1163 const struct intel_watermark_params *cursor,
1164 int cursor_latency_ns,
1165 int *plane_wm,
1166 int *cursor_wm)
1167 {
1168 struct drm_crtc *crtc;
1169 const struct drm_display_mode *adjusted_mode;
1170 int htotal, hdisplay, clock, pixel_size;
1171 int line_time_us, line_count;
1172 int entries, tlb_miss;
1173
1174 crtc = intel_get_crtc_for_plane(dev, plane);
1175 if (!intel_crtc_active(crtc)) {
1176 *cursor_wm = cursor->guard_size;
1177 *plane_wm = display->guard_size;
1178 return false;
1179 }
1180
1181 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1182 clock = adjusted_mode->crtc_clock;
1183 htotal = adjusted_mode->crtc_htotal;
1184 hdisplay = to_intel_crtc(crtc)->config.pipe_src_w;
1185 pixel_size = crtc->fb->bits_per_pixel / 8;
1186
1187 /* Use the small buffer method to calculate plane watermark */
1188 entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000;
1189 tlb_miss = display->fifo_size*display->cacheline_size - hdisplay * 8;
1190 if (tlb_miss > 0)
1191 entries += tlb_miss;
1192 entries = DIV_ROUND_UP(entries, display->cacheline_size);
1193 *plane_wm = entries + display->guard_size;
1194 if (*plane_wm > (int)display->max_wm)
1195 *plane_wm = display->max_wm;
1196
1197 /* Use the large buffer method to calculate cursor watermark */
1198 line_time_us = ((htotal * 1000) / clock);
1199 line_count = (cursor_latency_ns / line_time_us + 1000) / 1000;
1200 entries = line_count * 64 * pixel_size;
1201 tlb_miss = cursor->fifo_size*cursor->cacheline_size - hdisplay * 8;
1202 if (tlb_miss > 0)
1203 entries += tlb_miss;
1204 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
1205 *cursor_wm = entries + cursor->guard_size;
1206 if (*cursor_wm > (int)cursor->max_wm)
1207 *cursor_wm = (int)cursor->max_wm;
1208
1209 return true;
1210 }
1211
1212 /*
1213 * Check the wm result.
1214 *
1215 * If any calculated watermark values is larger than the maximum value that
1216 * can be programmed into the associated watermark register, that watermark
1217 * must be disabled.
1218 */
1219 static bool g4x_check_srwm(struct drm_device *dev,
1220 int display_wm, int cursor_wm,
1221 const struct intel_watermark_params *display,
1222 const struct intel_watermark_params *cursor)
1223 {
1224 DRM_DEBUG_KMS("SR watermark: display plane %d, cursor %d\n",
1225 display_wm, cursor_wm);
1226
1227 if (display_wm > display->max_wm) {
1228 DRM_DEBUG_KMS("display watermark is too large(%d/%ld), disabling\n",
1229 display_wm, display->max_wm);
1230 return false;
1231 }
1232
1233 if (cursor_wm > cursor->max_wm) {
1234 DRM_DEBUG_KMS("cursor watermark is too large(%d/%ld), disabling\n",
1235 cursor_wm, cursor->max_wm);
1236 return false;
1237 }
1238
1239 if (!(display_wm || cursor_wm)) {
1240 DRM_DEBUG_KMS("SR latency is 0, disabling\n");
1241 return false;
1242 }
1243
1244 return true;
1245 }
1246
1247 static bool g4x_compute_srwm(struct drm_device *dev,
1248 int plane,
1249 int latency_ns,
1250 const struct intel_watermark_params *display,
1251 const struct intel_watermark_params *cursor,
1252 int *display_wm, int *cursor_wm)
1253 {
1254 struct drm_crtc *crtc;
1255 const struct drm_display_mode *adjusted_mode;
1256 int hdisplay, htotal, pixel_size, clock;
1257 unsigned long line_time_us;
1258 int line_count, line_size;
1259 int small, large;
1260 int entries;
1261
1262 if (!latency_ns) {
1263 *display_wm = *cursor_wm = 0;
1264 return false;
1265 }
1266
1267 crtc = intel_get_crtc_for_plane(dev, plane);
1268 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1269 clock = adjusted_mode->crtc_clock;
1270 htotal = adjusted_mode->crtc_htotal;
1271 hdisplay = to_intel_crtc(crtc)->config.pipe_src_w;
1272 pixel_size = crtc->fb->bits_per_pixel / 8;
1273
1274 line_time_us = (htotal * 1000) / clock;
1275 line_count = (latency_ns / line_time_us + 1000) / 1000;
1276 line_size = hdisplay * pixel_size;
1277
1278 /* Use the minimum of the small and large buffer method for primary */
1279 small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
1280 large = line_count * line_size;
1281
1282 entries = DIV_ROUND_UP(min(small, large), display->cacheline_size);
1283 *display_wm = entries + display->guard_size;
1284
1285 /* calculate the self-refresh watermark for display cursor */
1286 entries = line_count * pixel_size * 64;
1287 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
1288 *cursor_wm = entries + cursor->guard_size;
1289
1290 return g4x_check_srwm(dev,
1291 *display_wm, *cursor_wm,
1292 display, cursor);
1293 }
1294
1295 static bool vlv_compute_drain_latency(struct drm_device *dev,
1296 int plane,
1297 int *plane_prec_mult,
1298 int *plane_dl,
1299 int *cursor_prec_mult,
1300 int *cursor_dl)
1301 {
1302 struct drm_crtc *crtc;
1303 int clock, pixel_size;
1304 int entries;
1305
1306 crtc = intel_get_crtc_for_plane(dev, plane);
1307 if (!intel_crtc_active(crtc))
1308 return false;
1309
1310 clock = to_intel_crtc(crtc)->config.adjusted_mode.crtc_clock;
1311 pixel_size = crtc->fb->bits_per_pixel / 8; /* BPP */
1312
1313 entries = (clock / 1000) * pixel_size;
1314 *plane_prec_mult = (entries > 256) ?
1315 DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16;
1316 *plane_dl = (64 * (*plane_prec_mult) * 4) / ((clock / 1000) *
1317 pixel_size);
1318
1319 entries = (clock / 1000) * 4; /* BPP is always 4 for cursor */
1320 *cursor_prec_mult = (entries > 256) ?
1321 DRAIN_LATENCY_PRECISION_32 : DRAIN_LATENCY_PRECISION_16;
1322 *cursor_dl = (64 * (*cursor_prec_mult) * 4) / ((clock / 1000) * 4);
1323
1324 return true;
1325 }
1326
1327 /*
1328 * Update drain latency registers of memory arbiter
1329 *
1330 * Valleyview SoC has a new memory arbiter and needs drain latency registers
1331 * to be programmed. Each plane has a drain latency multiplier and a drain
1332 * latency value.
1333 */
1334
1335 static void vlv_update_drain_latency(struct drm_device *dev)
1336 {
1337 struct drm_i915_private *dev_priv = dev->dev_private;
1338 int planea_prec, planea_dl, planeb_prec, planeb_dl;
1339 int cursora_prec, cursora_dl, cursorb_prec, cursorb_dl;
1340 int plane_prec_mult, cursor_prec_mult; /* Precision multiplier is
1341 either 16 or 32 */
1342
1343 /* For plane A, Cursor A */
1344 if (vlv_compute_drain_latency(dev, 0, &plane_prec_mult, &planea_dl,
1345 &cursor_prec_mult, &cursora_dl)) {
1346 cursora_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1347 DDL_CURSORA_PRECISION_32 : DDL_CURSORA_PRECISION_16;
1348 planea_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1349 DDL_PLANEA_PRECISION_32 : DDL_PLANEA_PRECISION_16;
1350
1351 I915_WRITE(VLV_DDL1, cursora_prec |
1352 (cursora_dl << DDL_CURSORA_SHIFT) |
1353 planea_prec | planea_dl);
1354 }
1355
1356 /* For plane B, Cursor B */
1357 if (vlv_compute_drain_latency(dev, 1, &plane_prec_mult, &planeb_dl,
1358 &cursor_prec_mult, &cursorb_dl)) {
1359 cursorb_prec = (cursor_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1360 DDL_CURSORB_PRECISION_32 : DDL_CURSORB_PRECISION_16;
1361 planeb_prec = (plane_prec_mult == DRAIN_LATENCY_PRECISION_32) ?
1362 DDL_PLANEB_PRECISION_32 : DDL_PLANEB_PRECISION_16;
1363
1364 I915_WRITE(VLV_DDL2, cursorb_prec |
1365 (cursorb_dl << DDL_CURSORB_SHIFT) |
1366 planeb_prec | planeb_dl);
1367 }
1368 }
1369
1370 #define single_plane_enabled(mask) is_power_of_2(mask)
1371
1372 static void valleyview_update_wm(struct drm_crtc *crtc)
1373 {
1374 struct drm_device *dev = crtc->dev;
1375 static const int sr_latency_ns = 12000;
1376 struct drm_i915_private *dev_priv = dev->dev_private;
1377 int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
1378 int plane_sr, cursor_sr;
1379 int ignore_plane_sr, ignore_cursor_sr;
1380 unsigned int enabled = 0;
1381
1382 vlv_update_drain_latency(dev);
1383
1384 if (g4x_compute_wm0(dev, PIPE_A,
1385 &valleyview_wm_info, latency_ns,
1386 &valleyview_cursor_wm_info, latency_ns,
1387 &planea_wm, &cursora_wm))
1388 enabled |= 1 << PIPE_A;
1389
1390 if (g4x_compute_wm0(dev, PIPE_B,
1391 &valleyview_wm_info, latency_ns,
1392 &valleyview_cursor_wm_info, latency_ns,
1393 &planeb_wm, &cursorb_wm))
1394 enabled |= 1 << PIPE_B;
1395
1396 if (single_plane_enabled(enabled) &&
1397 g4x_compute_srwm(dev, ffs(enabled) - 1,
1398 sr_latency_ns,
1399 &valleyview_wm_info,
1400 &valleyview_cursor_wm_info,
1401 &plane_sr, &ignore_cursor_sr) &&
1402 g4x_compute_srwm(dev, ffs(enabled) - 1,
1403 2*sr_latency_ns,
1404 &valleyview_wm_info,
1405 &valleyview_cursor_wm_info,
1406 &ignore_plane_sr, &cursor_sr)) {
1407 I915_WRITE(FW_BLC_SELF_VLV, FW_CSPWRDWNEN);
1408 } else {
1409 I915_WRITE(FW_BLC_SELF_VLV,
1410 I915_READ(FW_BLC_SELF_VLV) & ~FW_CSPWRDWNEN);
1411 plane_sr = cursor_sr = 0;
1412 }
1413
1414 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1415 planea_wm, cursora_wm,
1416 planeb_wm, cursorb_wm,
1417 plane_sr, cursor_sr);
1418
1419 I915_WRITE(DSPFW1,
1420 (plane_sr << DSPFW_SR_SHIFT) |
1421 (cursorb_wm << DSPFW_CURSORB_SHIFT) |
1422 (planeb_wm << DSPFW_PLANEB_SHIFT) |
1423 planea_wm);
1424 I915_WRITE(DSPFW2,
1425 (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) |
1426 (cursora_wm << DSPFW_CURSORA_SHIFT));
1427 I915_WRITE(DSPFW3,
1428 (I915_READ(DSPFW3) & ~DSPFW_CURSOR_SR_MASK) |
1429 (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1430 }
1431
1432 static void g4x_update_wm(struct drm_crtc *crtc)
1433 {
1434 struct drm_device *dev = crtc->dev;
1435 static const int sr_latency_ns = 12000;
1436 struct drm_i915_private *dev_priv = dev->dev_private;
1437 int planea_wm, planeb_wm, cursora_wm, cursorb_wm;
1438 int plane_sr, cursor_sr;
1439 unsigned int enabled = 0;
1440
1441 if (g4x_compute_wm0(dev, PIPE_A,
1442 &g4x_wm_info, latency_ns,
1443 &g4x_cursor_wm_info, latency_ns,
1444 &planea_wm, &cursora_wm))
1445 enabled |= 1 << PIPE_A;
1446
1447 if (g4x_compute_wm0(dev, PIPE_B,
1448 &g4x_wm_info, latency_ns,
1449 &g4x_cursor_wm_info, latency_ns,
1450 &planeb_wm, &cursorb_wm))
1451 enabled |= 1 << PIPE_B;
1452
1453 if (single_plane_enabled(enabled) &&
1454 g4x_compute_srwm(dev, ffs(enabled) - 1,
1455 sr_latency_ns,
1456 &g4x_wm_info,
1457 &g4x_cursor_wm_info,
1458 &plane_sr, &cursor_sr)) {
1459 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
1460 } else {
1461 I915_WRITE(FW_BLC_SELF,
1462 I915_READ(FW_BLC_SELF) & ~FW_BLC_SELF_EN);
1463 plane_sr = cursor_sr = 0;
1464 }
1465
1466 DRM_DEBUG_KMS("Setting FIFO watermarks - A: plane=%d, cursor=%d, B: plane=%d, cursor=%d, SR: plane=%d, cursor=%d\n",
1467 planea_wm, cursora_wm,
1468 planeb_wm, cursorb_wm,
1469 plane_sr, cursor_sr);
1470
1471 I915_WRITE(DSPFW1,
1472 (plane_sr << DSPFW_SR_SHIFT) |
1473 (cursorb_wm << DSPFW_CURSORB_SHIFT) |
1474 (planeb_wm << DSPFW_PLANEB_SHIFT) |
1475 planea_wm);
1476 I915_WRITE(DSPFW2,
1477 (I915_READ(DSPFW2) & ~DSPFW_CURSORA_MASK) |
1478 (cursora_wm << DSPFW_CURSORA_SHIFT));
1479 /* HPLL off in SR has some issues on G4x... disable it */
1480 I915_WRITE(DSPFW3,
1481 (I915_READ(DSPFW3) & ~(DSPFW_HPLL_SR_EN | DSPFW_CURSOR_SR_MASK)) |
1482 (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1483 }
1484
1485 static void i965_update_wm(struct drm_crtc *unused_crtc)
1486 {
1487 struct drm_device *dev = unused_crtc->dev;
1488 struct drm_i915_private *dev_priv = dev->dev_private;
1489 struct drm_crtc *crtc;
1490 int srwm = 1;
1491 int cursor_sr = 16;
1492
1493 /* Calc sr entries for one plane configs */
1494 crtc = single_enabled_crtc(dev);
1495 if (crtc) {
1496 /* self-refresh has much higher latency */
1497 static const int sr_latency_ns = 12000;
1498 const struct drm_display_mode *adjusted_mode =
1499 &to_intel_crtc(crtc)->config.adjusted_mode;
1500 int clock = adjusted_mode->crtc_clock;
1501 int htotal = adjusted_mode->crtc_htotal;
1502 int hdisplay = to_intel_crtc(crtc)->config.pipe_src_w;
1503 int pixel_size = crtc->fb->bits_per_pixel / 8;
1504 unsigned long line_time_us;
1505 int entries;
1506
1507 line_time_us = ((htotal * 1000) / clock);
1508
1509 /* Use ns/us then divide to preserve precision */
1510 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1511 pixel_size * hdisplay;
1512 entries = DIV_ROUND_UP(entries, I915_FIFO_LINE_SIZE);
1513 srwm = I965_FIFO_SIZE - entries;
1514 if (srwm < 0)
1515 srwm = 1;
1516 srwm &= 0x1ff;
1517 DRM_DEBUG_KMS("self-refresh entries: %d, wm: %d\n",
1518 entries, srwm);
1519
1520 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1521 pixel_size * 64;
1522 entries = DIV_ROUND_UP(entries,
1523 i965_cursor_wm_info.cacheline_size);
1524 cursor_sr = i965_cursor_wm_info.fifo_size -
1525 (entries + i965_cursor_wm_info.guard_size);
1526
1527 if (cursor_sr > i965_cursor_wm_info.max_wm)
1528 cursor_sr = i965_cursor_wm_info.max_wm;
1529
1530 DRM_DEBUG_KMS("self-refresh watermark: display plane %d "
1531 "cursor %d\n", srwm, cursor_sr);
1532
1533 if (IS_CRESTLINE(dev))
1534 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN);
1535 } else {
1536 /* Turn off self refresh if both pipes are enabled */
1537 if (IS_CRESTLINE(dev))
1538 I915_WRITE(FW_BLC_SELF, I915_READ(FW_BLC_SELF)
1539 & ~FW_BLC_SELF_EN);
1540 }
1541
1542 DRM_DEBUG_KMS("Setting FIFO watermarks - A: 8, B: 8, C: 8, SR %d\n",
1543 srwm);
1544
1545 /* 965 has limitations... */
1546 I915_WRITE(DSPFW1, (srwm << DSPFW_SR_SHIFT) |
1547 (8 << 16) | (8 << 8) | (8 << 0));
1548 I915_WRITE(DSPFW2, (8 << 8) | (8 << 0));
1549 /* update cursor SR watermark */
1550 I915_WRITE(DSPFW3, (cursor_sr << DSPFW_CURSOR_SR_SHIFT));
1551 }
1552
1553 static void i9xx_update_wm(struct drm_crtc *unused_crtc)
1554 {
1555 struct drm_device *dev = unused_crtc->dev;
1556 struct drm_i915_private *dev_priv = dev->dev_private;
1557 const struct intel_watermark_params *wm_info;
1558 uint32_t fwater_lo;
1559 uint32_t fwater_hi;
1560 int cwm, srwm = 1;
1561 int fifo_size;
1562 int planea_wm, planeb_wm;
1563 struct drm_crtc *crtc, *enabled = NULL;
1564
1565 if (IS_I945GM(dev))
1566 wm_info = &i945_wm_info;
1567 else if (!IS_GEN2(dev))
1568 wm_info = &i915_wm_info;
1569 else
1570 wm_info = &i855_wm_info;
1571
1572 fifo_size = dev_priv->display.get_fifo_size(dev, 0);
1573 crtc = intel_get_crtc_for_plane(dev, 0);
1574 if (intel_crtc_active(crtc)) {
1575 const struct drm_display_mode *adjusted_mode;
1576 int cpp = crtc->fb->bits_per_pixel / 8;
1577 if (IS_GEN2(dev))
1578 cpp = 4;
1579
1580 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1581 planea_wm = intel_calculate_wm(adjusted_mode->crtc_clock,
1582 wm_info, fifo_size, cpp,
1583 latency_ns);
1584 enabled = crtc;
1585 } else
1586 planea_wm = fifo_size - wm_info->guard_size;
1587
1588 fifo_size = dev_priv->display.get_fifo_size(dev, 1);
1589 crtc = intel_get_crtc_for_plane(dev, 1);
1590 if (intel_crtc_active(crtc)) {
1591 const struct drm_display_mode *adjusted_mode;
1592 int cpp = crtc->fb->bits_per_pixel / 8;
1593 if (IS_GEN2(dev))
1594 cpp = 4;
1595
1596 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1597 planeb_wm = intel_calculate_wm(adjusted_mode->crtc_clock,
1598 wm_info, fifo_size, cpp,
1599 latency_ns);
1600 if (enabled == NULL)
1601 enabled = crtc;
1602 else
1603 enabled = NULL;
1604 } else
1605 planeb_wm = fifo_size - wm_info->guard_size;
1606
1607 DRM_DEBUG_KMS("FIFO watermarks - A: %d, B: %d\n", planea_wm, planeb_wm);
1608
1609 /*
1610 * Overlay gets an aggressive default since video jitter is bad.
1611 */
1612 cwm = 2;
1613
1614 /* Play safe and disable self-refresh before adjusting watermarks. */
1615 if (IS_I945G(dev) || IS_I945GM(dev))
1616 I915_WRITE(FW_BLC_SELF, FW_BLC_SELF_EN_MASK | 0);
1617 else if (IS_I915GM(dev))
1618 I915_WRITE(INSTPM, I915_READ(INSTPM) & ~INSTPM_SELF_EN);
1619
1620 /* Calc sr entries for one plane configs */
1621 if (HAS_FW_BLC(dev) && enabled) {
1622 /* self-refresh has much higher latency */
1623 static const int sr_latency_ns = 6000;
1624 const struct drm_display_mode *adjusted_mode =
1625 &to_intel_crtc(enabled)->config.adjusted_mode;
1626 int clock = adjusted_mode->crtc_clock;
1627 int htotal = adjusted_mode->crtc_htotal;
1628 int hdisplay = to_intel_crtc(enabled)->config.pipe_src_w;
1629 int pixel_size = enabled->fb->bits_per_pixel / 8;
1630 unsigned long line_time_us;
1631 int entries;
1632
1633 line_time_us = (htotal * 1000) / clock;
1634
1635 /* Use ns/us then divide to preserve precision */
1636 entries = (((sr_latency_ns / line_time_us) + 1000) / 1000) *
1637 pixel_size * hdisplay;
1638 entries = DIV_ROUND_UP(entries, wm_info->cacheline_size);
1639 DRM_DEBUG_KMS("self-refresh entries: %d\n", entries);
1640 srwm = wm_info->fifo_size - entries;
1641 if (srwm < 0)
1642 srwm = 1;
1643
1644 if (IS_I945G(dev) || IS_I945GM(dev))
1645 I915_WRITE(FW_BLC_SELF,
1646 FW_BLC_SELF_FIFO_MASK | (srwm & 0xff));
1647 else if (IS_I915GM(dev))
1648 I915_WRITE(FW_BLC_SELF, srwm & 0x3f);
1649 }
1650
1651 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d, B: %d, C: %d, SR %d\n",
1652 planea_wm, planeb_wm, cwm, srwm);
1653
1654 fwater_lo = ((planeb_wm & 0x3f) << 16) | (planea_wm & 0x3f);
1655 fwater_hi = (cwm & 0x1f);
1656
1657 /* Set request length to 8 cachelines per fetch */
1658 fwater_lo = fwater_lo | (1 << 24) | (1 << 8);
1659 fwater_hi = fwater_hi | (1 << 8);
1660
1661 I915_WRITE(FW_BLC, fwater_lo);
1662 I915_WRITE(FW_BLC2, fwater_hi);
1663
1664 if (HAS_FW_BLC(dev)) {
1665 if (enabled) {
1666 if (IS_I945G(dev) || IS_I945GM(dev))
1667 I915_WRITE(FW_BLC_SELF,
1668 FW_BLC_SELF_EN_MASK | FW_BLC_SELF_EN);
1669 else if (IS_I915GM(dev))
1670 I915_WRITE(INSTPM, I915_READ(INSTPM) | INSTPM_SELF_EN);
1671 DRM_DEBUG_KMS("memory self refresh enabled\n");
1672 } else
1673 DRM_DEBUG_KMS("memory self refresh disabled\n");
1674 }
1675 }
1676
1677 static void i830_update_wm(struct drm_crtc *unused_crtc)
1678 {
1679 struct drm_device *dev = unused_crtc->dev;
1680 struct drm_i915_private *dev_priv = dev->dev_private;
1681 struct drm_crtc *crtc;
1682 const struct drm_display_mode *adjusted_mode;
1683 uint32_t fwater_lo;
1684 int planea_wm;
1685
1686 crtc = single_enabled_crtc(dev);
1687 if (crtc == NULL)
1688 return;
1689
1690 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1691 planea_wm = intel_calculate_wm(adjusted_mode->crtc_clock,
1692 &i830_wm_info,
1693 dev_priv->display.get_fifo_size(dev, 0),
1694 4, latency_ns);
1695 fwater_lo = I915_READ(FW_BLC) & ~0xfff;
1696 fwater_lo |= (3<<8) | planea_wm;
1697
1698 DRM_DEBUG_KMS("Setting FIFO watermarks - A: %d\n", planea_wm);
1699
1700 I915_WRITE(FW_BLC, fwater_lo);
1701 }
1702
1703 /*
1704 * Check the wm result.
1705 *
1706 * If any calculated watermark values is larger than the maximum value that
1707 * can be programmed into the associated watermark register, that watermark
1708 * must be disabled.
1709 */
1710 static bool ironlake_check_srwm(struct drm_device *dev, int level,
1711 int fbc_wm, int display_wm, int cursor_wm,
1712 const struct intel_watermark_params *display,
1713 const struct intel_watermark_params *cursor)
1714 {
1715 struct drm_i915_private *dev_priv = dev->dev_private;
1716
1717 DRM_DEBUG_KMS("watermark %d: display plane %d, fbc lines %d,"
1718 " cursor %d\n", level, display_wm, fbc_wm, cursor_wm);
1719
1720 if (fbc_wm > SNB_FBC_MAX_SRWM) {
1721 DRM_DEBUG_KMS("fbc watermark(%d) is too large(%d), disabling wm%d+\n",
1722 fbc_wm, SNB_FBC_MAX_SRWM, level);
1723
1724 /* fbc has it's own way to disable FBC WM */
1725 I915_WRITE(DISP_ARB_CTL,
1726 I915_READ(DISP_ARB_CTL) | DISP_FBC_WM_DIS);
1727 return false;
1728 } else if (INTEL_INFO(dev)->gen >= 6) {
1729 /* enable FBC WM (except on ILK, where it must remain off) */
1730 I915_WRITE(DISP_ARB_CTL,
1731 I915_READ(DISP_ARB_CTL) & ~DISP_FBC_WM_DIS);
1732 }
1733
1734 if (display_wm > display->max_wm) {
1735 DRM_DEBUG_KMS("display watermark(%d) is too large(%d), disabling wm%d+\n",
1736 display_wm, SNB_DISPLAY_MAX_SRWM, level);
1737 return false;
1738 }
1739
1740 if (cursor_wm > cursor->max_wm) {
1741 DRM_DEBUG_KMS("cursor watermark(%d) is too large(%d), disabling wm%d+\n",
1742 cursor_wm, SNB_CURSOR_MAX_SRWM, level);
1743 return false;
1744 }
1745
1746 if (!(fbc_wm || display_wm || cursor_wm)) {
1747 DRM_DEBUG_KMS("latency %d is 0, disabling wm%d+\n", level, level);
1748 return false;
1749 }
1750
1751 return true;
1752 }
1753
1754 /*
1755 * Compute watermark values of WM[1-3],
1756 */
1757 static bool ironlake_compute_srwm(struct drm_device *dev, int level, int plane,
1758 int latency_ns,
1759 const struct intel_watermark_params *display,
1760 const struct intel_watermark_params *cursor,
1761 int *fbc_wm, int *display_wm, int *cursor_wm)
1762 {
1763 struct drm_crtc *crtc;
1764 const struct drm_display_mode *adjusted_mode;
1765 unsigned long line_time_us;
1766 int hdisplay, htotal, pixel_size, clock;
1767 int line_count, line_size;
1768 int small, large;
1769 int entries;
1770
1771 if (!latency_ns) {
1772 *fbc_wm = *display_wm = *cursor_wm = 0;
1773 return false;
1774 }
1775
1776 crtc = intel_get_crtc_for_plane(dev, plane);
1777 adjusted_mode = &to_intel_crtc(crtc)->config.adjusted_mode;
1778 clock = adjusted_mode->crtc_clock;
1779 htotal = adjusted_mode->crtc_htotal;
1780 hdisplay = to_intel_crtc(crtc)->config.pipe_src_w;
1781 pixel_size = crtc->fb->bits_per_pixel / 8;
1782
1783 line_time_us = (htotal * 1000) / clock;
1784 line_count = (latency_ns / line_time_us + 1000) / 1000;
1785 line_size = hdisplay * pixel_size;
1786
1787 /* Use the minimum of the small and large buffer method for primary */
1788 small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
1789 large = line_count * line_size;
1790
1791 entries = DIV_ROUND_UP(min(small, large), display->cacheline_size);
1792 *display_wm = entries + display->guard_size;
1793
1794 /*
1795 * Spec says:
1796 * FBC WM = ((Final Primary WM * 64) / number of bytes per line) + 2
1797 */
1798 *fbc_wm = DIV_ROUND_UP(*display_wm * 64, line_size) + 2;
1799
1800 /* calculate the self-refresh watermark for display cursor */
1801 entries = line_count * pixel_size * 64;
1802 entries = DIV_ROUND_UP(entries, cursor->cacheline_size);
1803 *cursor_wm = entries + cursor->guard_size;
1804
1805 return ironlake_check_srwm(dev, level,
1806 *fbc_wm, *display_wm, *cursor_wm,
1807 display, cursor);
1808 }
1809
1810 static void ironlake_update_wm(struct drm_crtc *crtc)
1811 {
1812 struct drm_device *dev = crtc->dev;
1813 struct drm_i915_private *dev_priv = dev->dev_private;
1814 int fbc_wm, plane_wm, cursor_wm;
1815 unsigned int enabled;
1816
1817 enabled = 0;
1818 if (g4x_compute_wm0(dev, PIPE_A,
1819 &ironlake_display_wm_info,
1820 dev_priv->wm.pri_latency[0] * 100,
1821 &ironlake_cursor_wm_info,
1822 dev_priv->wm.cur_latency[0] * 100,
1823 &plane_wm, &cursor_wm)) {
1824 I915_WRITE(WM0_PIPEA_ILK,
1825 (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
1826 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
1827 " plane %d, " "cursor: %d\n",
1828 plane_wm, cursor_wm);
1829 enabled |= 1 << PIPE_A;
1830 }
1831
1832 if (g4x_compute_wm0(dev, PIPE_B,
1833 &ironlake_display_wm_info,
1834 dev_priv->wm.pri_latency[0] * 100,
1835 &ironlake_cursor_wm_info,
1836 dev_priv->wm.cur_latency[0] * 100,
1837 &plane_wm, &cursor_wm)) {
1838 I915_WRITE(WM0_PIPEB_ILK,
1839 (plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm);
1840 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
1841 " plane %d, cursor: %d\n",
1842 plane_wm, cursor_wm);
1843 enabled |= 1 << PIPE_B;
1844 }
1845
1846 /*
1847 * Calculate and update the self-refresh watermark only when one
1848 * display plane is used.
1849 */
1850 I915_WRITE(WM3_LP_ILK, 0);
1851 I915_WRITE(WM2_LP_ILK, 0);
1852 I915_WRITE(WM1_LP_ILK, 0);
1853
1854 if (!single_plane_enabled(enabled))
1855 return;
1856 enabled = ffs(enabled) - 1;
1857
1858 /* WM1 */
1859 if (!ironlake_compute_srwm(dev, 1, enabled,
1860 dev_priv->wm.pri_latency[1] * 500,
1861 &ironlake_display_srwm_info,
1862 &ironlake_cursor_srwm_info,
1863 &fbc_wm, &plane_wm, &cursor_wm))
1864 return;
1865
1866 I915_WRITE(WM1_LP_ILK,
1867 WM1_LP_SR_EN |
1868 (dev_priv->wm.pri_latency[1] << WM1_LP_LATENCY_SHIFT) |
1869 (fbc_wm << WM1_LP_FBC_SHIFT) |
1870 (plane_wm << WM1_LP_SR_SHIFT) |
1871 cursor_wm);
1872
1873 /* WM2 */
1874 if (!ironlake_compute_srwm(dev, 2, enabled,
1875 dev_priv->wm.pri_latency[2] * 500,
1876 &ironlake_display_srwm_info,
1877 &ironlake_cursor_srwm_info,
1878 &fbc_wm, &plane_wm, &cursor_wm))
1879 return;
1880
1881 I915_WRITE(WM2_LP_ILK,
1882 WM2_LP_EN |
1883 (dev_priv->wm.pri_latency[2] << WM1_LP_LATENCY_SHIFT) |
1884 (fbc_wm << WM1_LP_FBC_SHIFT) |
1885 (plane_wm << WM1_LP_SR_SHIFT) |
1886 cursor_wm);
1887
1888 /*
1889 * WM3 is unsupported on ILK, probably because we don't have latency
1890 * data for that power state
1891 */
1892 }
1893
1894 static void sandybridge_update_wm(struct drm_crtc *crtc)
1895 {
1896 struct drm_device *dev = crtc->dev;
1897 struct drm_i915_private *dev_priv = dev->dev_private;
1898 int latency = dev_priv->wm.pri_latency[0] * 100; /* In unit 0.1us */
1899 u32 val;
1900 int fbc_wm, plane_wm, cursor_wm;
1901 unsigned int enabled;
1902
1903 enabled = 0;
1904 if (g4x_compute_wm0(dev, PIPE_A,
1905 &sandybridge_display_wm_info, latency,
1906 &sandybridge_cursor_wm_info, latency,
1907 &plane_wm, &cursor_wm)) {
1908 val = I915_READ(WM0_PIPEA_ILK);
1909 val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
1910 I915_WRITE(WM0_PIPEA_ILK, val |
1911 ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm));
1912 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
1913 " plane %d, " "cursor: %d\n",
1914 plane_wm, cursor_wm);
1915 enabled |= 1 << PIPE_A;
1916 }
1917
1918 if (g4x_compute_wm0(dev, PIPE_B,
1919 &sandybridge_display_wm_info, latency,
1920 &sandybridge_cursor_wm_info, latency,
1921 &plane_wm, &cursor_wm)) {
1922 val = I915_READ(WM0_PIPEB_ILK);
1923 val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
1924 I915_WRITE(WM0_PIPEB_ILK, val |
1925 ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm));
1926 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
1927 " plane %d, cursor: %d\n",
1928 plane_wm, cursor_wm);
1929 enabled |= 1 << PIPE_B;
1930 }
1931
1932 /*
1933 * Calculate and update the self-refresh watermark only when one
1934 * display plane is used.
1935 *
1936 * SNB support 3 levels of watermark.
1937 *
1938 * WM1/WM2/WM2 watermarks have to be enabled in the ascending order,
1939 * and disabled in the descending order
1940 *
1941 */
1942 I915_WRITE(WM3_LP_ILK, 0);
1943 I915_WRITE(WM2_LP_ILK, 0);
1944 I915_WRITE(WM1_LP_ILK, 0);
1945
1946 if (!single_plane_enabled(enabled) ||
1947 dev_priv->sprite_scaling_enabled)
1948 return;
1949 enabled = ffs(enabled) - 1;
1950
1951 /* WM1 */
1952 if (!ironlake_compute_srwm(dev, 1, enabled,
1953 dev_priv->wm.pri_latency[1] * 500,
1954 &sandybridge_display_srwm_info,
1955 &sandybridge_cursor_srwm_info,
1956 &fbc_wm, &plane_wm, &cursor_wm))
1957 return;
1958
1959 I915_WRITE(WM1_LP_ILK,
1960 WM1_LP_SR_EN |
1961 (dev_priv->wm.pri_latency[1] << WM1_LP_LATENCY_SHIFT) |
1962 (fbc_wm << WM1_LP_FBC_SHIFT) |
1963 (plane_wm << WM1_LP_SR_SHIFT) |
1964 cursor_wm);
1965
1966 /* WM2 */
1967 if (!ironlake_compute_srwm(dev, 2, enabled,
1968 dev_priv->wm.pri_latency[2] * 500,
1969 &sandybridge_display_srwm_info,
1970 &sandybridge_cursor_srwm_info,
1971 &fbc_wm, &plane_wm, &cursor_wm))
1972 return;
1973
1974 I915_WRITE(WM2_LP_ILK,
1975 WM2_LP_EN |
1976 (dev_priv->wm.pri_latency[2] << WM1_LP_LATENCY_SHIFT) |
1977 (fbc_wm << WM1_LP_FBC_SHIFT) |
1978 (plane_wm << WM1_LP_SR_SHIFT) |
1979 cursor_wm);
1980
1981 /* WM3 */
1982 if (!ironlake_compute_srwm(dev, 3, enabled,
1983 dev_priv->wm.pri_latency[3] * 500,
1984 &sandybridge_display_srwm_info,
1985 &sandybridge_cursor_srwm_info,
1986 &fbc_wm, &plane_wm, &cursor_wm))
1987 return;
1988
1989 I915_WRITE(WM3_LP_ILK,
1990 WM3_LP_EN |
1991 (dev_priv->wm.pri_latency[3] << WM1_LP_LATENCY_SHIFT) |
1992 (fbc_wm << WM1_LP_FBC_SHIFT) |
1993 (plane_wm << WM1_LP_SR_SHIFT) |
1994 cursor_wm);
1995 }
1996
1997 static void ivybridge_update_wm(struct drm_crtc *crtc)
1998 {
1999 struct drm_device *dev = crtc->dev;
2000 struct drm_i915_private *dev_priv = dev->dev_private;
2001 int latency = dev_priv->wm.pri_latency[0] * 100; /* In unit 0.1us */
2002 u32 val;
2003 int fbc_wm, plane_wm, cursor_wm;
2004 int ignore_fbc_wm, ignore_plane_wm, ignore_cursor_wm;
2005 unsigned int enabled;
2006
2007 enabled = 0;
2008 if (g4x_compute_wm0(dev, PIPE_A,
2009 &sandybridge_display_wm_info, latency,
2010 &sandybridge_cursor_wm_info, latency,
2011 &plane_wm, &cursor_wm)) {
2012 val = I915_READ(WM0_PIPEA_ILK);
2013 val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
2014 I915_WRITE(WM0_PIPEA_ILK, val |
2015 ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm));
2016 DRM_DEBUG_KMS("FIFO watermarks For pipe A -"
2017 " plane %d, " "cursor: %d\n",
2018 plane_wm, cursor_wm);
2019 enabled |= 1 << PIPE_A;
2020 }
2021
2022 if (g4x_compute_wm0(dev, PIPE_B,
2023 &sandybridge_display_wm_info, latency,
2024 &sandybridge_cursor_wm_info, latency,
2025 &plane_wm, &cursor_wm)) {
2026 val = I915_READ(WM0_PIPEB_ILK);
2027 val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
2028 I915_WRITE(WM0_PIPEB_ILK, val |
2029 ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm));
2030 DRM_DEBUG_KMS("FIFO watermarks For pipe B -"
2031 " plane %d, cursor: %d\n",
2032 plane_wm, cursor_wm);
2033 enabled |= 1 << PIPE_B;
2034 }
2035
2036 if (g4x_compute_wm0(dev, PIPE_C,
2037 &sandybridge_display_wm_info, latency,
2038 &sandybridge_cursor_wm_info, latency,
2039 &plane_wm, &cursor_wm)) {
2040 val = I915_READ(WM0_PIPEC_IVB);
2041 val &= ~(WM0_PIPE_PLANE_MASK | WM0_PIPE_CURSOR_MASK);
2042 I915_WRITE(WM0_PIPEC_IVB, val |
2043 ((plane_wm << WM0_PIPE_PLANE_SHIFT) | cursor_wm));
2044 DRM_DEBUG_KMS("FIFO watermarks For pipe C -"
2045 " plane %d, cursor: %d\n",
2046 plane_wm, cursor_wm);
2047 enabled |= 1 << PIPE_C;
2048 }
2049
2050 /*
2051 * Calculate and update the self-refresh watermark only when one
2052 * display plane is used.
2053 *
2054 * SNB support 3 levels of watermark.
2055 *
2056 * WM1/WM2/WM2 watermarks have to be enabled in the ascending order,
2057 * and disabled in the descending order
2058 *
2059 */
2060 I915_WRITE(WM3_LP_ILK, 0);
2061 I915_WRITE(WM2_LP_ILK, 0);
2062 I915_WRITE(WM1_LP_ILK, 0);
2063
2064 if (!single_plane_enabled(enabled) ||
2065 dev_priv->sprite_scaling_enabled)
2066 return;
2067 enabled = ffs(enabled) - 1;
2068
2069 /* WM1 */
2070 if (!ironlake_compute_srwm(dev, 1, enabled,
2071 dev_priv->wm.pri_latency[1] * 500,
2072 &sandybridge_display_srwm_info,
2073 &sandybridge_cursor_srwm_info,
2074 &fbc_wm, &plane_wm, &cursor_wm))
2075 return;
2076
2077 I915_WRITE(WM1_LP_ILK,
2078 WM1_LP_SR_EN |
2079 (dev_priv->wm.pri_latency[1] << WM1_LP_LATENCY_SHIFT) |
2080 (fbc_wm << WM1_LP_FBC_SHIFT) |
2081 (plane_wm << WM1_LP_SR_SHIFT) |
2082 cursor_wm);
2083
2084 /* WM2 */
2085 if (!ironlake_compute_srwm(dev, 2, enabled,
2086 dev_priv->wm.pri_latency[2] * 500,
2087 &sandybridge_display_srwm_info,
2088 &sandybridge_cursor_srwm_info,
2089 &fbc_wm, &plane_wm, &cursor_wm))
2090 return;
2091
2092 I915_WRITE(WM2_LP_ILK,
2093 WM2_LP_EN |
2094 (dev_priv->wm.pri_latency[2] << WM1_LP_LATENCY_SHIFT) |
2095 (fbc_wm << WM1_LP_FBC_SHIFT) |
2096 (plane_wm << WM1_LP_SR_SHIFT) |
2097 cursor_wm);
2098
2099 /* WM3, note we have to correct the cursor latency */
2100 if (!ironlake_compute_srwm(dev, 3, enabled,
2101 dev_priv->wm.pri_latency[3] * 500,
2102 &sandybridge_display_srwm_info,
2103 &sandybridge_cursor_srwm_info,
2104 &fbc_wm, &plane_wm, &ignore_cursor_wm) ||
2105 !ironlake_compute_srwm(dev, 3, enabled,
2106 dev_priv->wm.cur_latency[3] * 500,
2107 &sandybridge_display_srwm_info,
2108 &sandybridge_cursor_srwm_info,
2109 &ignore_fbc_wm, &ignore_plane_wm, &cursor_wm))
2110 return;
2111
2112 I915_WRITE(WM3_LP_ILK,
2113 WM3_LP_EN |
2114 (dev_priv->wm.pri_latency[3] << WM1_LP_LATENCY_SHIFT) |
2115 (fbc_wm << WM1_LP_FBC_SHIFT) |
2116 (plane_wm << WM1_LP_SR_SHIFT) |
2117 cursor_wm);
2118 }
2119
2120 static uint32_t ilk_pipe_pixel_rate(struct drm_device *dev,
2121 struct drm_crtc *crtc)
2122 {
2123 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2124 uint32_t pixel_rate;
2125
2126 pixel_rate = intel_crtc->config.adjusted_mode.crtc_clock;
2127
2128 /* We only use IF-ID interlacing. If we ever use PF-ID we'll need to
2129 * adjust the pixel_rate here. */
2130
2131 if (intel_crtc->config.pch_pfit.enabled) {
2132 uint64_t pipe_w, pipe_h, pfit_w, pfit_h;
2133 uint32_t pfit_size = intel_crtc->config.pch_pfit.size;
2134
2135 pipe_w = intel_crtc->config.pipe_src_w;
2136 pipe_h = intel_crtc->config.pipe_src_h;
2137 pfit_w = (pfit_size >> 16) & 0xFFFF;
2138 pfit_h = pfit_size & 0xFFFF;
2139 if (pipe_w < pfit_w)
2140 pipe_w = pfit_w;
2141 if (pipe_h < pfit_h)
2142 pipe_h = pfit_h;
2143
2144 pixel_rate = div_u64((uint64_t) pixel_rate * pipe_w * pipe_h,
2145 pfit_w * pfit_h);
2146 }
2147
2148 return pixel_rate;
2149 }
2150
2151 /* latency must be in 0.1us units. */
2152 static uint32_t ilk_wm_method1(uint32_t pixel_rate, uint8_t bytes_per_pixel,
2153 uint32_t latency)
2154 {
2155 uint64_t ret;
2156
2157 if (WARN(latency == 0, "Latency value missing\n"))
2158 return UINT_MAX;
2159
2160 ret = (uint64_t) pixel_rate * bytes_per_pixel * latency;
2161 ret = DIV_ROUND_UP_ULL(ret, 64 * 10000) + 2;
2162
2163 return ret;
2164 }
2165
2166 /* latency must be in 0.1us units. */
2167 static uint32_t ilk_wm_method2(uint32_t pixel_rate, uint32_t pipe_htotal,
2168 uint32_t horiz_pixels, uint8_t bytes_per_pixel,
2169 uint32_t latency)
2170 {
2171 uint32_t ret;
2172
2173 if (WARN(latency == 0, "Latency value missing\n"))
2174 return UINT_MAX;
2175
2176 ret = (latency * pixel_rate) / (pipe_htotal * 10000);
2177 ret = (ret + 1) * horiz_pixels * bytes_per_pixel;
2178 ret = DIV_ROUND_UP(ret, 64) + 2;
2179 return ret;
2180 }
2181
2182 static uint32_t ilk_wm_fbc(uint32_t pri_val, uint32_t horiz_pixels,
2183 uint8_t bytes_per_pixel)
2184 {
2185 return DIV_ROUND_UP(pri_val * 64, horiz_pixels * bytes_per_pixel) + 2;
2186 }
2187
2188 struct hsw_pipe_wm_parameters {
2189 bool active;
2190 uint32_t pipe_htotal;
2191 uint32_t pixel_rate;
2192 struct intel_plane_wm_parameters pri;
2193 struct intel_plane_wm_parameters spr;
2194 struct intel_plane_wm_parameters cur;
2195 };
2196
2197 struct hsw_wm_maximums {
2198 uint16_t pri;
2199 uint16_t spr;
2200 uint16_t cur;
2201 uint16_t fbc;
2202 };
2203
2204 /* used in computing the new watermarks state */
2205 struct intel_wm_config {
2206 unsigned int num_pipes_active;
2207 bool sprites_enabled;
2208 bool sprites_scaled;
2209 };
2210
2211 /*
2212 * For both WM_PIPE and WM_LP.
2213 * mem_value must be in 0.1us units.
2214 */
2215 static uint32_t ilk_compute_pri_wm(const struct hsw_pipe_wm_parameters *params,
2216 uint32_t mem_value,
2217 bool is_lp)
2218 {
2219 uint32_t method1, method2;
2220
2221 if (!params->active || !params->pri.enabled)
2222 return 0;
2223
2224 method1 = ilk_wm_method1(params->pixel_rate,
2225 params->pri.bytes_per_pixel,
2226 mem_value);
2227
2228 if (!is_lp)
2229 return method1;
2230
2231 method2 = ilk_wm_method2(params->pixel_rate,
2232 params->pipe_htotal,
2233 params->pri.horiz_pixels,
2234 params->pri.bytes_per_pixel,
2235 mem_value);
2236
2237 return min(method1, method2);
2238 }
2239
2240 /*
2241 * For both WM_PIPE and WM_LP.
2242 * mem_value must be in 0.1us units.
2243 */
2244 static uint32_t ilk_compute_spr_wm(const struct hsw_pipe_wm_parameters *params,
2245 uint32_t mem_value)
2246 {
2247 uint32_t method1, method2;
2248
2249 if (!params->active || !params->spr.enabled)
2250 return 0;
2251
2252 method1 = ilk_wm_method1(params->pixel_rate,
2253 params->spr.bytes_per_pixel,
2254 mem_value);
2255 method2 = ilk_wm_method2(params->pixel_rate,
2256 params->pipe_htotal,
2257 params->spr.horiz_pixels,
2258 params->spr.bytes_per_pixel,
2259 mem_value);
2260 return min(method1, method2);
2261 }
2262
2263 /*
2264 * For both WM_PIPE and WM_LP.
2265 * mem_value must be in 0.1us units.
2266 */
2267 static uint32_t ilk_compute_cur_wm(const struct hsw_pipe_wm_parameters *params,
2268 uint32_t mem_value)
2269 {
2270 if (!params->active || !params->cur.enabled)
2271 return 0;
2272
2273 return ilk_wm_method2(params->pixel_rate,
2274 params->pipe_htotal,
2275 params->cur.horiz_pixels,
2276 params->cur.bytes_per_pixel,
2277 mem_value);
2278 }
2279
2280 /* Only for WM_LP. */
2281 static uint32_t ilk_compute_fbc_wm(const struct hsw_pipe_wm_parameters *params,
2282 uint32_t pri_val)
2283 {
2284 if (!params->active || !params->pri.enabled)
2285 return 0;
2286
2287 return ilk_wm_fbc(pri_val,
2288 params->pri.horiz_pixels,
2289 params->pri.bytes_per_pixel);
2290 }
2291
2292 static unsigned int ilk_display_fifo_size(const struct drm_device *dev)
2293 {
2294 if (INTEL_INFO(dev)->gen >= 8)
2295 return 3072;
2296 else if (INTEL_INFO(dev)->gen >= 7)
2297 return 768;
2298 else
2299 return 512;
2300 }
2301
2302 /* Calculate the maximum primary/sprite plane watermark */
2303 static unsigned int ilk_plane_wm_max(const struct drm_device *dev,
2304 int level,
2305 const struct intel_wm_config *config,
2306 enum intel_ddb_partitioning ddb_partitioning,
2307 bool is_sprite)
2308 {
2309 unsigned int fifo_size = ilk_display_fifo_size(dev);
2310 unsigned int max;
2311
2312 /* if sprites aren't enabled, sprites get nothing */
2313 if (is_sprite && !config->sprites_enabled)
2314 return 0;
2315
2316 /* HSW allows LP1+ watermarks even with multiple pipes */
2317 if (level == 0 || config->num_pipes_active > 1) {
2318 fifo_size /= INTEL_INFO(dev)->num_pipes;
2319
2320 /*
2321 * For some reason the non self refresh
2322 * FIFO size is only half of the self
2323 * refresh FIFO size on ILK/SNB.
2324 */
2325 if (INTEL_INFO(dev)->gen <= 6)
2326 fifo_size /= 2;
2327 }
2328
2329 if (config->sprites_enabled) {
2330 /* level 0 is always calculated with 1:1 split */
2331 if (level > 0 && ddb_partitioning == INTEL_DDB_PART_5_6) {
2332 if (is_sprite)
2333 fifo_size *= 5;
2334 fifo_size /= 6;
2335 } else {
2336 fifo_size /= 2;
2337 }
2338 }
2339
2340 /* clamp to max that the registers can hold */
2341 if (INTEL_INFO(dev)->gen >= 8)
2342 max = level == 0 ? 255 : 2047;
2343 else if (INTEL_INFO(dev)->gen >= 7)
2344 /* IVB/HSW primary/sprite plane watermarks */
2345 max = level == 0 ? 127 : 1023;
2346 else if (!is_sprite)
2347 /* ILK/SNB primary plane watermarks */
2348 max = level == 0 ? 127 : 511;
2349 else
2350 /* ILK/SNB sprite plane watermarks */
2351 max = level == 0 ? 63 : 255;
2352
2353 return min(fifo_size, max);
2354 }
2355
2356 /* Calculate the maximum cursor plane watermark */
2357 static unsigned int ilk_cursor_wm_max(const struct drm_device *dev,
2358 int level,
2359 const struct intel_wm_config *config)
2360 {
2361 /* HSW LP1+ watermarks w/ multiple pipes */
2362 if (level > 0 && config->num_pipes_active > 1)
2363 return 64;
2364
2365 /* otherwise just report max that registers can hold */
2366 if (INTEL_INFO(dev)->gen >= 7)
2367 return level == 0 ? 63 : 255;
2368 else
2369 return level == 0 ? 31 : 63;
2370 }
2371
2372 /* Calculate the maximum FBC watermark */
2373 static unsigned int ilk_fbc_wm_max(struct drm_device *dev)
2374 {
2375 /* max that registers can hold */
2376 if (INTEL_INFO(dev)->gen >= 8)
2377 return 31;
2378 else
2379 return 15;
2380 }
2381
2382 static void ilk_compute_wm_maximums(struct drm_device *dev,
2383 int level,
2384 const struct intel_wm_config *config,
2385 enum intel_ddb_partitioning ddb_partitioning,
2386 struct hsw_wm_maximums *max)
2387 {
2388 max->pri = ilk_plane_wm_max(dev, level, config, ddb_partitioning, false);
2389 max->spr = ilk_plane_wm_max(dev, level, config, ddb_partitioning, true);
2390 max->cur = ilk_cursor_wm_max(dev, level, config);
2391 max->fbc = ilk_fbc_wm_max(dev);
2392 }
2393
2394 static bool ilk_validate_wm_level(int level,
2395 const struct hsw_wm_maximums *max,
2396 struct intel_wm_level *result)
2397 {
2398 bool ret;
2399
2400 /* already determined to be invalid? */
2401 if (!result->enable)
2402 return false;
2403
2404 result->enable = result->pri_val <= max->pri &&
2405 result->spr_val <= max->spr &&
2406 result->cur_val <= max->cur;
2407
2408 ret = result->enable;
2409
2410 /*
2411 * HACK until we can pre-compute everything,
2412 * and thus fail gracefully if LP0 watermarks
2413 * are exceeded...
2414 */
2415 if (level == 0 && !result->enable) {
2416 if (result->pri_val > max->pri)
2417 DRM_DEBUG_KMS("Primary WM%d too large %u (max %u)\n",
2418 level, result->pri_val, max->pri);
2419 if (result->spr_val > max->spr)
2420 DRM_DEBUG_KMS("Sprite WM%d too large %u (max %u)\n",
2421 level, result->spr_val, max->spr);
2422 if (result->cur_val > max->cur)
2423 DRM_DEBUG_KMS("Cursor WM%d too large %u (max %u)\n",
2424 level, result->cur_val, max->cur);
2425
2426 result->pri_val = min_t(uint32_t, result->pri_val, max->pri);
2427 result->spr_val = min_t(uint32_t, result->spr_val, max->spr);
2428 result->cur_val = min_t(uint32_t, result->cur_val, max->cur);
2429 result->enable = true;
2430 }
2431
2432 return ret;
2433 }
2434
2435 static void ilk_compute_wm_level(struct drm_i915_private *dev_priv,
2436 int level,
2437 const struct hsw_pipe_wm_parameters *p,
2438 struct intel_wm_level *result)
2439 {
2440 uint16_t pri_latency = dev_priv->wm.pri_latency[level];
2441 uint16_t spr_latency = dev_priv->wm.spr_latency[level];
2442 uint16_t cur_latency = dev_priv->wm.cur_latency[level];
2443
2444 /* WM1+ latency values stored in 0.5us units */
2445 if (level > 0) {
2446 pri_latency *= 5;
2447 spr_latency *= 5;
2448 cur_latency *= 5;
2449 }
2450
2451 result->pri_val = ilk_compute_pri_wm(p, pri_latency, level);
2452 result->spr_val = ilk_compute_spr_wm(p, spr_latency);
2453 result->cur_val = ilk_compute_cur_wm(p, cur_latency);
2454 result->fbc_val = ilk_compute_fbc_wm(p, result->pri_val);
2455 result->enable = true;
2456 }
2457
2458 static uint32_t
2459 hsw_compute_linetime_wm(struct drm_device *dev, struct drm_crtc *crtc)
2460 {
2461 struct drm_i915_private *dev_priv = dev->dev_private;
2462 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2463 struct drm_display_mode *mode = &intel_crtc->config.adjusted_mode;
2464 u32 linetime, ips_linetime;
2465
2466 if (!intel_crtc_active(crtc))
2467 return 0;
2468
2469 /* The WM are computed with base on how long it takes to fill a single
2470 * row at the given clock rate, multiplied by 8.
2471 * */
2472 linetime = DIV_ROUND_CLOSEST(mode->crtc_htotal * 1000 * 8,
2473 mode->crtc_clock);
2474 ips_linetime = DIV_ROUND_CLOSEST(mode->crtc_htotal * 1000 * 8,
2475 intel_ddi_get_cdclk_freq(dev_priv));
2476
2477 return PIPE_WM_LINETIME_IPS_LINETIME(ips_linetime) |
2478 PIPE_WM_LINETIME_TIME(linetime);
2479 }
2480
2481 static void intel_read_wm_latency(struct drm_device *dev, uint16_t wm[5])
2482 {
2483 struct drm_i915_private *dev_priv = dev->dev_private;
2484
2485 if (IS_HASWELL(dev)) {
2486 uint64_t sskpd = I915_READ64(MCH_SSKPD);
2487
2488 wm[0] = (sskpd >> 56) & 0xFF;
2489 if (wm[0] == 0)
2490 wm[0] = sskpd & 0xF;
2491 wm[1] = (sskpd >> 4) & 0xFF;
2492 wm[2] = (sskpd >> 12) & 0xFF;
2493 wm[3] = (sskpd >> 20) & 0x1FF;
2494 wm[4] = (sskpd >> 32) & 0x1FF;
2495 } else if (INTEL_INFO(dev)->gen >= 6) {
2496 uint32_t sskpd = I915_READ(MCH_SSKPD);
2497
2498 wm[0] = (sskpd >> SSKPD_WM0_SHIFT) & SSKPD_WM_MASK;
2499 wm[1] = (sskpd >> SSKPD_WM1_SHIFT) & SSKPD_WM_MASK;
2500 wm[2] = (sskpd >> SSKPD_WM2_SHIFT) & SSKPD_WM_MASK;
2501 wm[3] = (sskpd >> SSKPD_WM3_SHIFT) & SSKPD_WM_MASK;
2502 } else if (INTEL_INFO(dev)->gen >= 5) {
2503 uint32_t mltr = I915_READ(MLTR_ILK);
2504
2505 /* ILK primary LP0 latency is 700 ns */
2506 wm[0] = 7;
2507 wm[1] = (mltr >> MLTR_WM1_SHIFT) & ILK_SRLT_MASK;
2508 wm[2] = (mltr >> MLTR_WM2_SHIFT) & ILK_SRLT_MASK;
2509 }
2510 }
2511
2512 static void intel_fixup_spr_wm_latency(struct drm_device *dev, uint16_t wm[5])
2513 {
2514 /* ILK sprite LP0 latency is 1300 ns */
2515 if (INTEL_INFO(dev)->gen == 5)
2516 wm[0] = 13;
2517 }
2518
2519 static void intel_fixup_cur_wm_latency(struct drm_device *dev, uint16_t wm[5])
2520 {
2521 /* ILK cursor LP0 latency is 1300 ns */
2522 if (INTEL_INFO(dev)->gen == 5)
2523 wm[0] = 13;
2524
2525 /* WaDoubleCursorLP3Latency:ivb */
2526 if (IS_IVYBRIDGE(dev))
2527 wm[3] *= 2;
2528 }
2529
2530 static int ilk_wm_max_level(const struct drm_device *dev)
2531 {
2532 /* how many WM levels are we expecting */
2533 if (IS_HASWELL(dev))
2534 return 4;
2535 else if (INTEL_INFO(dev)->gen >= 6)
2536 return 3;
2537 else
2538 return 2;
2539 }
2540
2541 static void intel_print_wm_latency(struct drm_device *dev,
2542 const char *name,
2543 const uint16_t wm[5])
2544 {
2545 int level, max_level = ilk_wm_max_level(dev);
2546
2547 for (level = 0; level <= max_level; level++) {
2548 unsigned int latency = wm[level];
2549
2550 if (latency == 0) {
2551 DRM_ERROR("%s WM%d latency not provided\n",
2552 name, level);
2553 continue;
2554 }
2555
2556 /* WM1+ latency values in 0.5us units */
2557 if (level > 0)
2558 latency *= 5;
2559
2560 DRM_DEBUG_KMS("%s WM%d latency %u (%u.%u usec)\n",
2561 name, level, wm[level],
2562 latency / 10, latency % 10);
2563 }
2564 }
2565
2566 static void intel_setup_wm_latency(struct drm_device *dev)
2567 {
2568 struct drm_i915_private *dev_priv = dev->dev_private;
2569
2570 intel_read_wm_latency(dev, dev_priv->wm.pri_latency);
2571
2572 memcpy(dev_priv->wm.spr_latency, dev_priv->wm.pri_latency,
2573 sizeof(dev_priv->wm.pri_latency));
2574 memcpy(dev_priv->wm.cur_latency, dev_priv->wm.pri_latency,
2575 sizeof(dev_priv->wm.pri_latency));
2576
2577 intel_fixup_spr_wm_latency(dev, dev_priv->wm.spr_latency);
2578 intel_fixup_cur_wm_latency(dev, dev_priv->wm.cur_latency);
2579
2580 intel_print_wm_latency(dev, "Primary", dev_priv->wm.pri_latency);
2581 intel_print_wm_latency(dev, "Sprite", dev_priv->wm.spr_latency);
2582 intel_print_wm_latency(dev, "Cursor", dev_priv->wm.cur_latency);
2583 }
2584
2585 static void hsw_compute_wm_parameters(struct drm_crtc *crtc,
2586 struct hsw_pipe_wm_parameters *p,
2587 struct intel_wm_config *config)
2588 {
2589 struct drm_device *dev = crtc->dev;
2590 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2591 enum pipe pipe = intel_crtc->pipe;
2592 struct drm_plane *plane;
2593
2594 p->active = intel_crtc_active(crtc);
2595 if (p->active) {
2596 p->pipe_htotal = intel_crtc->config.adjusted_mode.htotal;
2597 p->pixel_rate = ilk_pipe_pixel_rate(dev, crtc);
2598 p->pri.bytes_per_pixel = crtc->fb->bits_per_pixel / 8;
2599 p->cur.bytes_per_pixel = 4;
2600 p->pri.horiz_pixels = intel_crtc->config.pipe_src_w;
2601 p->cur.horiz_pixels = 64;
2602 /* TODO: for now, assume primary and cursor planes are always enabled. */
2603 p->pri.enabled = true;
2604 p->cur.enabled = true;
2605 }
2606
2607 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
2608 config->num_pipes_active += intel_crtc_active(crtc);
2609
2610 list_for_each_entry(plane, &dev->mode_config.plane_list, head) {
2611 struct intel_plane *intel_plane = to_intel_plane(plane);
2612
2613 if (intel_plane->pipe == pipe)
2614 p->spr = intel_plane->wm;
2615
2616 config->sprites_enabled |= intel_plane->wm.enabled;
2617 config->sprites_scaled |= intel_plane->wm.scaled;
2618 }
2619 }
2620
2621 /* Compute new watermarks for the pipe */
2622 static bool intel_compute_pipe_wm(struct drm_crtc *crtc,
2623 const struct hsw_pipe_wm_parameters *params,
2624 struct intel_pipe_wm *pipe_wm)
2625 {
2626 struct drm_device *dev = crtc->dev;
2627 struct drm_i915_private *dev_priv = dev->dev_private;
2628 int level, max_level = ilk_wm_max_level(dev);
2629 /* LP0 watermark maximums depend on this pipe alone */
2630 struct intel_wm_config config = {
2631 .num_pipes_active = 1,
2632 .sprites_enabled = params->spr.enabled,
2633 .sprites_scaled = params->spr.scaled,
2634 };
2635 struct hsw_wm_maximums max;
2636
2637 /* LP0 watermarks always use 1/2 DDB partitioning */
2638 ilk_compute_wm_maximums(dev, 0, &config, INTEL_DDB_PART_1_2, &max);
2639
2640 for (level = 0; level <= max_level; level++)
2641 ilk_compute_wm_level(dev_priv, level, params,
2642 &pipe_wm->wm[level]);
2643
2644 pipe_wm->linetime = hsw_compute_linetime_wm(dev, crtc);
2645
2646 /* At least LP0 must be valid */
2647 return ilk_validate_wm_level(0, &max, &pipe_wm->wm[0]);
2648 }
2649
2650 /*
2651 * Merge the watermarks from all active pipes for a specific level.
2652 */
2653 static void ilk_merge_wm_level(struct drm_device *dev,
2654 int level,
2655 struct intel_wm_level *ret_wm)
2656 {
2657 const struct intel_crtc *intel_crtc;
2658
2659 list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list, base.head) {
2660 const struct intel_wm_level *wm =
2661 &intel_crtc->wm.active.wm[level];
2662
2663 if (!wm->enable)
2664 return;
2665
2666 ret_wm->pri_val = max(ret_wm->pri_val, wm->pri_val);
2667 ret_wm->spr_val = max(ret_wm->spr_val, wm->spr_val);
2668 ret_wm->cur_val = max(ret_wm->cur_val, wm->cur_val);
2669 ret_wm->fbc_val = max(ret_wm->fbc_val, wm->fbc_val);
2670 }
2671
2672 ret_wm->enable = true;
2673 }
2674
2675 /*
2676 * Merge all low power watermarks for all active pipes.
2677 */
2678 static void ilk_wm_merge(struct drm_device *dev,
2679 const struct hsw_wm_maximums *max,
2680 struct intel_pipe_wm *merged)
2681 {
2682 int level, max_level = ilk_wm_max_level(dev);
2683
2684 merged->fbc_wm_enabled = true;
2685
2686 /* merge each WM1+ level */
2687 for (level = 1; level <= max_level; level++) {
2688 struct intel_wm_level *wm = &merged->wm[level];
2689
2690 ilk_merge_wm_level(dev, level, wm);
2691
2692 if (!ilk_validate_wm_level(level, max, wm))
2693 break;
2694
2695 /*
2696 * The spec says it is preferred to disable
2697 * FBC WMs instead of disabling a WM level.
2698 */
2699 if (wm->fbc_val > max->fbc) {
2700 merged->fbc_wm_enabled = false;
2701 wm->fbc_val = 0;
2702 }
2703 }
2704 }
2705
2706 static int ilk_wm_lp_to_level(int wm_lp, const struct intel_pipe_wm *pipe_wm)
2707 {
2708 /* LP1,LP2,LP3 levels are either 1,2,3 or 1,3,4 */
2709 return wm_lp + (wm_lp >= 2 && pipe_wm->wm[4].enable);
2710 }
2711
2712 static void hsw_compute_wm_results(struct drm_device *dev,
2713 const struct intel_pipe_wm *merged,
2714 enum intel_ddb_partitioning partitioning,
2715 struct hsw_wm_values *results)
2716 {
2717 struct intel_crtc *intel_crtc;
2718 int level, wm_lp;
2719
2720 results->enable_fbc_wm = merged->fbc_wm_enabled;
2721 results->partitioning = partitioning;
2722
2723 /* LP1+ register values */
2724 for (wm_lp = 1; wm_lp <= 3; wm_lp++) {
2725 const struct intel_wm_level *r;
2726
2727 level = ilk_wm_lp_to_level(wm_lp, merged);
2728
2729 r = &merged->wm[level];
2730 if (!r->enable)
2731 break;
2732
2733 results->wm_lp[wm_lp - 1] = WM3_LP_EN |
2734 ((level * 2) << WM1_LP_LATENCY_SHIFT) |
2735 (r->pri_val << WM1_LP_SR_SHIFT) |
2736 r->cur_val;
2737
2738 if (INTEL_INFO(dev)->gen >= 8)
2739 results->wm_lp[wm_lp - 1] |=
2740 r->fbc_val << WM1_LP_FBC_SHIFT_BDW;
2741 else
2742 results->wm_lp[wm_lp - 1] |=
2743 r->fbc_val << WM1_LP_FBC_SHIFT;
2744
2745 results->wm_lp_spr[wm_lp - 1] = r->spr_val;
2746 }
2747
2748 /* LP0 register values */
2749 list_for_each_entry(intel_crtc, &dev->mode_config.crtc_list, base.head) {
2750 enum pipe pipe = intel_crtc->pipe;
2751 const struct intel_wm_level *r =
2752 &intel_crtc->wm.active.wm[0];
2753
2754 if (WARN_ON(!r->enable))
2755 continue;
2756
2757 results->wm_linetime[pipe] = intel_crtc->wm.active.linetime;
2758
2759 results->wm_pipe[pipe] =
2760 (r->pri_val << WM0_PIPE_PLANE_SHIFT) |
2761 (r->spr_val << WM0_PIPE_SPRITE_SHIFT) |
2762 r->cur_val;
2763 }
2764 }
2765
2766 /* Find the result with the highest level enabled. Check for enable_fbc_wm in
2767 * case both are at the same level. Prefer r1 in case they're the same. */
2768 static struct intel_pipe_wm *hsw_find_best_result(struct drm_device *dev,
2769 struct intel_pipe_wm *r1,
2770 struct intel_pipe_wm *r2)
2771 {
2772 int level, max_level = ilk_wm_max_level(dev);
2773 int level1 = 0, level2 = 0;
2774
2775 for (level = 1; level <= max_level; level++) {
2776 if (r1->wm[level].enable)
2777 level1 = level;
2778 if (r2->wm[level].enable)
2779 level2 = level;
2780 }
2781
2782 if (level1 == level2) {
2783 if (r2->fbc_wm_enabled && !r1->fbc_wm_enabled)
2784 return r2;
2785 else
2786 return r1;
2787 } else if (level1 > level2) {
2788 return r1;
2789 } else {
2790 return r2;
2791 }
2792 }
2793
2794 /* dirty bits used to track which watermarks need changes */
2795 #define WM_DIRTY_PIPE(pipe) (1 << (pipe))
2796 #define WM_DIRTY_LINETIME(pipe) (1 << (8 + (pipe)))
2797 #define WM_DIRTY_LP(wm_lp) (1 << (15 + (wm_lp)))
2798 #define WM_DIRTY_LP_ALL (WM_DIRTY_LP(1) | WM_DIRTY_LP(2) | WM_DIRTY_LP(3))
2799 #define WM_DIRTY_FBC (1 << 24)
2800 #define WM_DIRTY_DDB (1 << 25)
2801
2802 static unsigned int ilk_compute_wm_dirty(struct drm_device *dev,
2803 const struct hsw_wm_values *old,
2804 const struct hsw_wm_values *new)
2805 {
2806 unsigned int dirty = 0;
2807 enum pipe pipe;
2808 int wm_lp;
2809
2810 for_each_pipe(pipe) {
2811 if (old->wm_linetime[pipe] != new->wm_linetime[pipe]) {
2812 dirty |= WM_DIRTY_LINETIME(pipe);
2813 /* Must disable LP1+ watermarks too */
2814 dirty |= WM_DIRTY_LP_ALL;
2815 }
2816
2817 if (old->wm_pipe[pipe] != new->wm_pipe[pipe]) {
2818 dirty |= WM_DIRTY_PIPE(pipe);
2819 /* Must disable LP1+ watermarks too */
2820 dirty |= WM_DIRTY_LP_ALL;
2821 }
2822 }
2823
2824 if (old->enable_fbc_wm != new->enable_fbc_wm) {
2825 dirty |= WM_DIRTY_FBC;
2826 /* Must disable LP1+ watermarks too */
2827 dirty |= WM_DIRTY_LP_ALL;
2828 }
2829
2830 if (old->partitioning != new->partitioning) {
2831 dirty |= WM_DIRTY_DDB;
2832 /* Must disable LP1+ watermarks too */
2833 dirty |= WM_DIRTY_LP_ALL;
2834 }
2835
2836 /* LP1+ watermarks already deemed dirty, no need to continue */
2837 if (dirty & WM_DIRTY_LP_ALL)
2838 return dirty;
2839
2840 /* Find the lowest numbered LP1+ watermark in need of an update... */
2841 for (wm_lp = 1; wm_lp <= 3; wm_lp++) {
2842 if (old->wm_lp[wm_lp - 1] != new->wm_lp[wm_lp - 1] ||
2843 old->wm_lp_spr[wm_lp - 1] != new->wm_lp_spr[wm_lp - 1])
2844 break;
2845 }
2846
2847 /* ...and mark it and all higher numbered LP1+ watermarks as dirty */
2848 for (; wm_lp <= 3; wm_lp++)
2849 dirty |= WM_DIRTY_LP(wm_lp);
2850
2851 return dirty;
2852 }
2853
2854 /*
2855 * The spec says we shouldn't write when we don't need, because every write
2856 * causes WMs to be re-evaluated, expending some power.
2857 */
2858 static void hsw_write_wm_values(struct drm_i915_private *dev_priv,
2859 struct hsw_wm_values *results)
2860 {
2861 struct hsw_wm_values *previous = &dev_priv->wm.hw;
2862 unsigned int dirty;
2863 uint32_t val;
2864
2865 dirty = ilk_compute_wm_dirty(dev_priv->dev, previous, results);
2866 if (!dirty)
2867 return;
2868
2869 if (dirty & WM_DIRTY_LP(3) && previous->wm_lp[2] != 0)
2870 I915_WRITE(WM3_LP_ILK, 0);
2871 if (dirty & WM_DIRTY_LP(2) && previous->wm_lp[1] != 0)
2872 I915_WRITE(WM2_LP_ILK, 0);
2873 if (dirty & WM_DIRTY_LP(1) && previous->wm_lp[0] != 0)
2874 I915_WRITE(WM1_LP_ILK, 0);
2875
2876 if (dirty & WM_DIRTY_PIPE(PIPE_A))
2877 I915_WRITE(WM0_PIPEA_ILK, results->wm_pipe[0]);
2878 if (dirty & WM_DIRTY_PIPE(PIPE_B))
2879 I915_WRITE(WM0_PIPEB_ILK, results->wm_pipe[1]);
2880 if (dirty & WM_DIRTY_PIPE(PIPE_C))
2881 I915_WRITE(WM0_PIPEC_IVB, results->wm_pipe[2]);
2882
2883 if (dirty & WM_DIRTY_LINETIME(PIPE_A))
2884 I915_WRITE(PIPE_WM_LINETIME(PIPE_A), results->wm_linetime[0]);
2885 if (dirty & WM_DIRTY_LINETIME(PIPE_B))
2886 I915_WRITE(PIPE_WM_LINETIME(PIPE_B), results->wm_linetime[1]);
2887 if (dirty & WM_DIRTY_LINETIME(PIPE_C))
2888 I915_WRITE(PIPE_WM_LINETIME(PIPE_C), results->wm_linetime[2]);
2889
2890 if (dirty & WM_DIRTY_DDB) {
2891 val = I915_READ(WM_MISC);
2892 if (results->partitioning == INTEL_DDB_PART_1_2)
2893 val &= ~WM_MISC_DATA_PARTITION_5_6;
2894 else
2895 val |= WM_MISC_DATA_PARTITION_5_6;
2896 I915_WRITE(WM_MISC, val);
2897 }
2898
2899 if (dirty & WM_DIRTY_FBC) {
2900 val = I915_READ(DISP_ARB_CTL);
2901 if (results->enable_fbc_wm)
2902 val &= ~DISP_FBC_WM_DIS;
2903 else
2904 val |= DISP_FBC_WM_DIS;
2905 I915_WRITE(DISP_ARB_CTL, val);
2906 }
2907
2908 if (dirty & WM_DIRTY_LP(1) && previous->wm_lp_spr[0] != results->wm_lp_spr[0])
2909 I915_WRITE(WM1S_LP_ILK, results->wm_lp_spr[0]);
2910 if (dirty & WM_DIRTY_LP(2) && previous->wm_lp_spr[1] != results->wm_lp_spr[1])
2911 I915_WRITE(WM2S_LP_IVB, results->wm_lp_spr[1]);
2912 if (dirty & WM_DIRTY_LP(3) && previous->wm_lp_spr[2] != results->wm_lp_spr[2])
2913 I915_WRITE(WM3S_LP_IVB, results->wm_lp_spr[2]);
2914
2915 if (dirty & WM_DIRTY_LP(1) && results->wm_lp[0] != 0)
2916 I915_WRITE(WM1_LP_ILK, results->wm_lp[0]);
2917 if (dirty & WM_DIRTY_LP(2) && results->wm_lp[1] != 0)
2918 I915_WRITE(WM2_LP_ILK, results->wm_lp[1]);
2919 if (dirty & WM_DIRTY_LP(3) && results->wm_lp[2] != 0)
2920 I915_WRITE(WM3_LP_ILK, results->wm_lp[2]);
2921
2922 dev_priv->wm.hw = *results;
2923 }
2924
2925 static void haswell_update_wm(struct drm_crtc *crtc)
2926 {
2927 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
2928 struct drm_device *dev = crtc->dev;
2929 struct drm_i915_private *dev_priv = dev->dev_private;
2930 struct hsw_wm_maximums max;
2931 struct hsw_pipe_wm_parameters params = {};
2932 struct hsw_wm_values results = {};
2933 enum intel_ddb_partitioning partitioning;
2934 struct intel_pipe_wm pipe_wm = {};
2935 struct intel_pipe_wm lp_wm_1_2 = {}, lp_wm_5_6 = {}, *best_lp_wm;
2936 struct intel_wm_config config = {};
2937
2938 hsw_compute_wm_parameters(crtc, &params, &config);
2939
2940 intel_compute_pipe_wm(crtc, &params, &pipe_wm);
2941
2942 if (!memcmp(&intel_crtc->wm.active, &pipe_wm, sizeof(pipe_wm)))
2943 return;
2944
2945 intel_crtc->wm.active = pipe_wm;
2946
2947 ilk_compute_wm_maximums(dev, 1, &config, INTEL_DDB_PART_1_2, &max);
2948 ilk_wm_merge(dev, &max, &lp_wm_1_2);
2949
2950 /* 5/6 split only in single pipe config on IVB+ */
2951 if (INTEL_INFO(dev)->gen >= 7 &&
2952 config.num_pipes_active == 1 && config.sprites_enabled) {
2953 ilk_compute_wm_maximums(dev, 1, &config, INTEL_DDB_PART_5_6, &max);
2954 ilk_wm_merge(dev, &max, &lp_wm_5_6);
2955
2956 best_lp_wm = hsw_find_best_result(dev, &lp_wm_1_2, &lp_wm_5_6);
2957 } else {
2958 best_lp_wm = &lp_wm_1_2;
2959 }
2960
2961 partitioning = (best_lp_wm == &lp_wm_1_2) ?
2962 INTEL_DDB_PART_1_2 : INTEL_DDB_PART_5_6;
2963
2964 hsw_compute_wm_results(dev, best_lp_wm, partitioning, &results);
2965
2966 hsw_write_wm_values(dev_priv, &results);
2967 }
2968
2969 static void haswell_update_sprite_wm(struct drm_plane *plane,
2970 struct drm_crtc *crtc,
2971 uint32_t sprite_width, int pixel_size,
2972 bool enabled, bool scaled)
2973 {
2974 struct intel_plane *intel_plane = to_intel_plane(plane);
2975
2976 intel_plane->wm.enabled = enabled;
2977 intel_plane->wm.scaled = scaled;
2978 intel_plane->wm.horiz_pixels = sprite_width;
2979 intel_plane->wm.bytes_per_pixel = pixel_size;
2980
2981 haswell_update_wm(crtc);
2982 }
2983
2984 static bool
2985 sandybridge_compute_sprite_wm(struct drm_device *dev, int plane,
2986 uint32_t sprite_width, int pixel_size,
2987 const struct intel_watermark_params *display,
2988 int display_latency_ns, int *sprite_wm)
2989 {
2990 struct drm_crtc *crtc;
2991 int clock;
2992 int entries, tlb_miss;
2993
2994 crtc = intel_get_crtc_for_plane(dev, plane);
2995 if (!intel_crtc_active(crtc)) {
2996 *sprite_wm = display->guard_size;
2997 return false;
2998 }
2999
3000 clock = to_intel_crtc(crtc)->config.adjusted_mode.crtc_clock;
3001
3002 /* Use the small buffer method to calculate the sprite watermark */
3003 entries = ((clock * pixel_size / 1000) * display_latency_ns) / 1000;
3004 tlb_miss = display->fifo_size*display->cacheline_size -
3005 sprite_width * 8;
3006 if (tlb_miss > 0)
3007 entries += tlb_miss;
3008 entries = DIV_ROUND_UP(entries, display->cacheline_size);
3009 *sprite_wm = entries + display->guard_size;
3010 if (*sprite_wm > (int)display->max_wm)
3011 *sprite_wm = display->max_wm;
3012
3013 return true;
3014 }
3015
3016 static bool
3017 sandybridge_compute_sprite_srwm(struct drm_device *dev, int plane,
3018 uint32_t sprite_width, int pixel_size,
3019 const struct intel_watermark_params *display,
3020 int latency_ns, int *sprite_wm)
3021 {
3022 struct drm_crtc *crtc;
3023 unsigned long line_time_us;
3024 int clock;
3025 int line_count, line_size;
3026 int small, large;
3027 int entries;
3028
3029 if (!latency_ns) {
3030 *sprite_wm = 0;
3031 return false;
3032 }
3033
3034 crtc = intel_get_crtc_for_plane(dev, plane);
3035 clock = to_intel_crtc(crtc)->config.adjusted_mode.crtc_clock;
3036 if (!clock) {
3037 *sprite_wm = 0;
3038 return false;
3039 }
3040
3041 line_time_us = (sprite_width * 1000) / clock;
3042 if (!line_time_us) {
3043 *sprite_wm = 0;
3044 return false;
3045 }
3046
3047 line_count = (latency_ns / line_time_us + 1000) / 1000;
3048 line_size = sprite_width * pixel_size;
3049
3050 /* Use the minimum of the small and large buffer method for primary */
3051 small = ((clock * pixel_size / 1000) * latency_ns) / 1000;
3052 large = line_count * line_size;
3053
3054 entries = DIV_ROUND_UP(min(small, large), display->cacheline_size);
3055 *sprite_wm = entries + display->guard_size;
3056
3057 return *sprite_wm > 0x3ff ? false : true;
3058 }
3059
3060 static void sandybridge_update_sprite_wm(struct drm_plane *plane,
3061 struct drm_crtc *crtc,
3062 uint32_t sprite_width, int pixel_size,
3063 bool enabled, bool scaled)
3064 {
3065 struct drm_device *dev = plane->dev;
3066 struct drm_i915_private *dev_priv = dev->dev_private;
3067 int pipe = to_intel_plane(plane)->pipe;
3068 int latency = dev_priv->wm.spr_latency[0] * 100; /* In unit 0.1us */
3069 u32 val;
3070 int sprite_wm, reg;
3071 int ret;
3072
3073 if (!enabled)
3074 return;
3075
3076 switch (pipe) {
3077 case 0:
3078 reg = WM0_PIPEA_ILK;
3079 break;
3080 case 1:
3081 reg = WM0_PIPEB_ILK;
3082 break;
3083 case 2:
3084 reg = WM0_PIPEC_IVB;
3085 break;
3086 default:
3087 return; /* bad pipe */
3088 }
3089
3090 ret = sandybridge_compute_sprite_wm(dev, pipe, sprite_width, pixel_size,
3091 &sandybridge_display_wm_info,
3092 latency, &sprite_wm);
3093 if (!ret) {
3094 DRM_DEBUG_KMS("failed to compute sprite wm for pipe %c\n",
3095 pipe_name(pipe));
3096 return;
3097 }
3098
3099 val = I915_READ(reg);
3100 val &= ~WM0_PIPE_SPRITE_MASK;
3101 I915_WRITE(reg, val | (sprite_wm << WM0_PIPE_SPRITE_SHIFT));
3102 DRM_DEBUG_KMS("sprite watermarks For pipe %c - %d\n", pipe_name(pipe), sprite_wm);
3103
3104
3105 ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width,
3106 pixel_size,
3107 &sandybridge_display_srwm_info,
3108 dev_priv->wm.spr_latency[1] * 500,
3109 &sprite_wm);
3110 if (!ret) {
3111 DRM_DEBUG_KMS("failed to compute sprite lp1 wm on pipe %c\n",
3112 pipe_name(pipe));
3113 return;
3114 }
3115 I915_WRITE(WM1S_LP_ILK, sprite_wm);
3116
3117 /* Only IVB has two more LP watermarks for sprite */
3118 if (!IS_IVYBRIDGE(dev))
3119 return;
3120
3121 ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width,
3122 pixel_size,
3123 &sandybridge_display_srwm_info,
3124 dev_priv->wm.spr_latency[2] * 500,
3125 &sprite_wm);
3126 if (!ret) {
3127 DRM_DEBUG_KMS("failed to compute sprite lp2 wm on pipe %c\n",
3128 pipe_name(pipe));
3129 return;
3130 }
3131 I915_WRITE(WM2S_LP_IVB, sprite_wm);
3132
3133 ret = sandybridge_compute_sprite_srwm(dev, pipe, sprite_width,
3134 pixel_size,
3135 &sandybridge_display_srwm_info,
3136 dev_priv->wm.spr_latency[3] * 500,
3137 &sprite_wm);
3138 if (!ret) {
3139 DRM_DEBUG_KMS("failed to compute sprite lp3 wm on pipe %c\n",
3140 pipe_name(pipe));
3141 return;
3142 }
3143 I915_WRITE(WM3S_LP_IVB, sprite_wm);
3144 }
3145
3146 static void ilk_pipe_wm_get_hw_state(struct drm_crtc *crtc)
3147 {
3148 struct drm_device *dev = crtc->dev;
3149 struct drm_i915_private *dev_priv = dev->dev_private;
3150 struct hsw_wm_values *hw = &dev_priv->wm.hw;
3151 struct intel_crtc *intel_crtc = to_intel_crtc(crtc);
3152 struct intel_pipe_wm *active = &intel_crtc->wm.active;
3153 enum pipe pipe = intel_crtc->pipe;
3154 static const unsigned int wm0_pipe_reg[] = {
3155 [PIPE_A] = WM0_PIPEA_ILK,
3156 [PIPE_B] = WM0_PIPEB_ILK,
3157 [PIPE_C] = WM0_PIPEC_IVB,
3158 };
3159
3160 hw->wm_pipe[pipe] = I915_READ(wm0_pipe_reg[pipe]);
3161 hw->wm_linetime[pipe] = I915_READ(PIPE_WM_LINETIME(pipe));
3162
3163 if (intel_crtc_active(crtc)) {
3164 u32 tmp = hw->wm_pipe[pipe];
3165
3166 /*
3167 * For active pipes LP0 watermark is marked as
3168 * enabled, and LP1+ watermaks as disabled since
3169 * we can't really reverse compute them in case
3170 * multiple pipes are active.
3171 */
3172 active->wm[0].enable = true;
3173 active->wm[0].pri_val = (tmp & WM0_PIPE_PLANE_MASK) >> WM0_PIPE_PLANE_SHIFT;
3174 active->wm[0].spr_val = (tmp & WM0_PIPE_SPRITE_MASK) >> WM0_PIPE_SPRITE_SHIFT;
3175 active->wm[0].cur_val = tmp & WM0_PIPE_CURSOR_MASK;
3176 active->linetime = hw->wm_linetime[pipe];
3177 } else {
3178 int level, max_level = ilk_wm_max_level(dev);
3179
3180 /*
3181 * For inactive pipes, all watermark levels
3182 * should be marked as enabled but zeroed,
3183 * which is what we'd compute them to.
3184 */
3185 for (level = 0; level <= max_level; level++)
3186 active->wm[level].enable = true;
3187 }
3188 }
3189
3190 void ilk_wm_get_hw_state(struct drm_device *dev)
3191 {
3192 struct drm_i915_private *dev_priv = dev->dev_private;
3193 struct hsw_wm_values *hw = &dev_priv->wm.hw;
3194 struct drm_crtc *crtc;
3195
3196 list_for_each_entry(crtc, &dev->mode_config.crtc_list, head)
3197 ilk_pipe_wm_get_hw_state(crtc);
3198
3199 hw->wm_lp[0] = I915_READ(WM1_LP_ILK);
3200 hw->wm_lp[1] = I915_READ(WM2_LP_ILK);
3201 hw->wm_lp[2] = I915_READ(WM3_LP_ILK);
3202
3203 hw->wm_lp_spr[0] = I915_READ(WM1S_LP_ILK);
3204 hw->wm_lp_spr[1] = I915_READ(WM2S_LP_IVB);
3205 hw->wm_lp_spr[2] = I915_READ(WM3S_LP_IVB);
3206
3207 hw->partitioning = (I915_READ(WM_MISC) & WM_MISC_DATA_PARTITION_5_6) ?
3208 INTEL_DDB_PART_5_6 : INTEL_DDB_PART_1_2;
3209
3210 hw->enable_fbc_wm =
3211 !(I915_READ(DISP_ARB_CTL) & DISP_FBC_WM_DIS);
3212 }
3213
3214 /**
3215 * intel_update_watermarks - update FIFO watermark values based on current modes
3216 *
3217 * Calculate watermark values for the various WM regs based on current mode
3218 * and plane configuration.
3219 *
3220 * There are several cases to deal with here:
3221 * - normal (i.e. non-self-refresh)
3222 * - self-refresh (SR) mode
3223 * - lines are large relative to FIFO size (buffer can hold up to 2)
3224 * - lines are small relative to FIFO size (buffer can hold more than 2
3225 * lines), so need to account for TLB latency
3226 *
3227 * The normal calculation is:
3228 * watermark = dotclock * bytes per pixel * latency
3229 * where latency is platform & configuration dependent (we assume pessimal
3230 * values here).
3231 *
3232 * The SR calculation is:
3233 * watermark = (trunc(latency/line time)+1) * surface width *
3234 * bytes per pixel
3235 * where
3236 * line time = htotal / dotclock
3237 * surface width = hdisplay for normal plane and 64 for cursor
3238 * and latency is assumed to be high, as above.
3239 *
3240 * The final value programmed to the register should always be rounded up,
3241 * and include an extra 2 entries to account for clock crossings.
3242 *
3243 * We don't use the sprite, so we can ignore that. And on Crestline we have
3244 * to set the non-SR watermarks to 8.
3245 */
3246 void intel_update_watermarks(struct drm_crtc *crtc)
3247 {
3248 struct drm_i915_private *dev_priv = crtc->dev->dev_private;
3249
3250 if (dev_priv->display.update_wm)
3251 dev_priv->display.update_wm(crtc);
3252 }
3253
3254 void intel_update_sprite_watermarks(struct drm_plane *plane,
3255 struct drm_crtc *crtc,
3256 uint32_t sprite_width, int pixel_size,
3257 bool enabled, bool scaled)
3258 {
3259 struct drm_i915_private *dev_priv = plane->dev->dev_private;
3260
3261 if (dev_priv->display.update_sprite_wm)
3262 dev_priv->display.update_sprite_wm(plane, crtc, sprite_width,
3263 pixel_size, enabled, scaled);
3264 }
3265
3266 static struct drm_i915_gem_object *
3267 intel_alloc_context_page(struct drm_device *dev)
3268 {
3269 struct drm_i915_gem_object *ctx;
3270 int ret;
3271
3272 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
3273
3274 ctx = i915_gem_alloc_object(dev, 4096);
3275 if (!ctx) {
3276 DRM_DEBUG("failed to alloc power context, RC6 disabled\n");
3277 return NULL;
3278 }
3279
3280 ret = i915_gem_obj_ggtt_pin(ctx, 4096, true, false);
3281 if (ret) {
3282 DRM_ERROR("failed to pin power context: %d\n", ret);
3283 goto err_unref;
3284 }
3285
3286 ret = i915_gem_object_set_to_gtt_domain(ctx, 1);
3287 if (ret) {
3288 DRM_ERROR("failed to set-domain on power context: %d\n", ret);
3289 goto err_unpin;
3290 }
3291
3292 return ctx;
3293
3294 err_unpin:
3295 i915_gem_object_unpin(ctx);
3296 err_unref:
3297 drm_gem_object_unreference(&ctx->base);
3298 return NULL;
3299 }
3300
3301 /**
3302 * Lock protecting IPS related data structures
3303 */
3304 DEFINE_SPINLOCK(mchdev_lock);
3305
3306 /* Global for IPS driver to get at the current i915 device. Protected by
3307 * mchdev_lock. */
3308 static struct drm_i915_private *i915_mch_dev;
3309
3310 bool ironlake_set_drps(struct drm_device *dev, u8 val)
3311 {
3312 struct drm_i915_private *dev_priv = dev->dev_private;
3313 u16 rgvswctl;
3314
3315 assert_spin_locked(&mchdev_lock);
3316
3317 rgvswctl = I915_READ16(MEMSWCTL);
3318 if (rgvswctl & MEMCTL_CMD_STS) {
3319 DRM_DEBUG("gpu busy, RCS change rejected\n");
3320 return false; /* still busy with another command */
3321 }
3322
3323 rgvswctl = (MEMCTL_CMD_CHFREQ << MEMCTL_CMD_SHIFT) |
3324 (val << MEMCTL_FREQ_SHIFT) | MEMCTL_SFCAVM;
3325 I915_WRITE16(MEMSWCTL, rgvswctl);
3326 POSTING_READ16(MEMSWCTL);
3327
3328 rgvswctl |= MEMCTL_CMD_STS;
3329 I915_WRITE16(MEMSWCTL, rgvswctl);
3330
3331 return true;
3332 }
3333
3334 static void ironlake_enable_drps(struct drm_device *dev)
3335 {
3336 struct drm_i915_private *dev_priv = dev->dev_private;
3337 u32 rgvmodectl = I915_READ(MEMMODECTL);
3338 u8 fmax, fmin, fstart, vstart;
3339
3340 spin_lock_irq(&mchdev_lock);
3341
3342 /* Enable temp reporting */
3343 I915_WRITE16(PMMISC, I915_READ(PMMISC) | MCPPCE_EN);
3344 I915_WRITE16(TSC1, I915_READ(TSC1) | TSE);
3345
3346 /* 100ms RC evaluation intervals */
3347 I915_WRITE(RCUPEI, 100000);
3348 I915_WRITE(RCDNEI, 100000);
3349
3350 /* Set max/min thresholds to 90ms and 80ms respectively */
3351 I915_WRITE(RCBMAXAVG, 90000);
3352 I915_WRITE(RCBMINAVG, 80000);
3353
3354 I915_WRITE(MEMIHYST, 1);
3355
3356 /* Set up min, max, and cur for interrupt handling */
3357 fmax = (rgvmodectl & MEMMODE_FMAX_MASK) >> MEMMODE_FMAX_SHIFT;
3358 fmin = (rgvmodectl & MEMMODE_FMIN_MASK);
3359 fstart = (rgvmodectl & MEMMODE_FSTART_MASK) >>
3360 MEMMODE_FSTART_SHIFT;
3361
3362 vstart = (I915_READ(PXVFREQ_BASE + (fstart * 4)) & PXVFREQ_PX_MASK) >>
3363 PXVFREQ_PX_SHIFT;
3364
3365 dev_priv->ips.fmax = fmax; /* IPS callback will increase this */
3366 dev_priv->ips.fstart = fstart;
3367
3368 dev_priv->ips.max_delay = fstart;
3369 dev_priv->ips.min_delay = fmin;
3370 dev_priv->ips.cur_delay = fstart;
3371
3372 DRM_DEBUG_DRIVER("fmax: %d, fmin: %d, fstart: %d\n",
3373 fmax, fmin, fstart);
3374
3375 I915_WRITE(MEMINTREN, MEMINT_CX_SUPR_EN | MEMINT_EVAL_CHG_EN);
3376
3377 /*
3378 * Interrupts will be enabled in ironlake_irq_postinstall
3379 */
3380
3381 I915_WRITE(VIDSTART, vstart);
3382 POSTING_READ(VIDSTART);
3383
3384 rgvmodectl |= MEMMODE_SWMODE_EN;
3385 I915_WRITE(MEMMODECTL, rgvmodectl);
3386
3387 if (wait_for_atomic((I915_READ(MEMSWCTL) & MEMCTL_CMD_STS) == 0, 10))
3388 DRM_ERROR("stuck trying to change perf mode\n");
3389 mdelay(1);
3390
3391 ironlake_set_drps(dev, fstart);
3392
3393 dev_priv->ips.last_count1 = I915_READ(0x112e4) + I915_READ(0x112e8) +
3394 I915_READ(0x112e0);
3395 dev_priv->ips.last_time1 = jiffies_to_msecs(jiffies);
3396 dev_priv->ips.last_count2 = I915_READ(0x112f4);
3397 getrawmonotonic(&dev_priv->ips.last_time2);
3398
3399 spin_unlock_irq(&mchdev_lock);
3400 }
3401
3402 static void ironlake_disable_drps(struct drm_device *dev)
3403 {
3404 struct drm_i915_private *dev_priv = dev->dev_private;
3405 u16 rgvswctl;
3406
3407 spin_lock_irq(&mchdev_lock);
3408
3409 rgvswctl = I915_READ16(MEMSWCTL);
3410
3411 /* Ack interrupts, disable EFC interrupt */
3412 I915_WRITE(MEMINTREN, I915_READ(MEMINTREN) & ~MEMINT_EVAL_CHG_EN);
3413 I915_WRITE(MEMINTRSTS, MEMINT_EVAL_CHG);
3414 I915_WRITE(DEIER, I915_READ(DEIER) & ~DE_PCU_EVENT);
3415 I915_WRITE(DEIIR, DE_PCU_EVENT);
3416 I915_WRITE(DEIMR, I915_READ(DEIMR) | DE_PCU_EVENT);
3417
3418 /* Go back to the starting frequency */
3419 ironlake_set_drps(dev, dev_priv->ips.fstart);
3420 mdelay(1);
3421 rgvswctl |= MEMCTL_CMD_STS;
3422 I915_WRITE(MEMSWCTL, rgvswctl);
3423 mdelay(1);
3424
3425 spin_unlock_irq(&mchdev_lock);
3426 }
3427
3428 /* There's a funny hw issue where the hw returns all 0 when reading from
3429 * GEN6_RP_INTERRUPT_LIMITS. Hence we always need to compute the desired value
3430 * ourselves, instead of doing a rmw cycle (which might result in us clearing
3431 * all limits and the gpu stuck at whatever frequency it is at atm).
3432 */
3433 static u32 gen6_rps_limits(struct drm_i915_private *dev_priv, u8 *val)
3434 {
3435 u32 limits;
3436
3437 limits = 0;
3438
3439 if (*val >= dev_priv->rps.max_delay)
3440 *val = dev_priv->rps.max_delay;
3441 limits |= dev_priv->rps.max_delay << 24;
3442
3443 /* Only set the down limit when we've reached the lowest level to avoid
3444 * getting more interrupts, otherwise leave this clear. This prevents a
3445 * race in the hw when coming out of rc6: There's a tiny window where
3446 * the hw runs at the minimal clock before selecting the desired
3447 * frequency, if the down threshold expires in that window we will not
3448 * receive a down interrupt. */
3449 if (*val <= dev_priv->rps.min_delay) {
3450 *val = dev_priv->rps.min_delay;
3451 limits |= dev_priv->rps.min_delay << 16;
3452 }
3453
3454 return limits;
3455 }
3456
3457 static void gen6_set_rps_thresholds(struct drm_i915_private *dev_priv, u8 val)
3458 {
3459 int new_power;
3460
3461 new_power = dev_priv->rps.power;
3462 switch (dev_priv->rps.power) {
3463 case LOW_POWER:
3464 if (val > dev_priv->rps.rpe_delay + 1 && val > dev_priv->rps.cur_delay)
3465 new_power = BETWEEN;
3466 break;
3467
3468 case BETWEEN:
3469 if (val <= dev_priv->rps.rpe_delay && val < dev_priv->rps.cur_delay)
3470 new_power = LOW_POWER;
3471 else if (val >= dev_priv->rps.rp0_delay && val > dev_priv->rps.cur_delay)
3472 new_power = HIGH_POWER;
3473 break;
3474
3475 case HIGH_POWER:
3476 if (val < (dev_priv->rps.rp1_delay + dev_priv->rps.rp0_delay) >> 1 && val < dev_priv->rps.cur_delay)
3477 new_power = BETWEEN;
3478 break;
3479 }
3480 /* Max/min bins are special */
3481 if (val == dev_priv->rps.min_delay)
3482 new_power = LOW_POWER;
3483 if (val == dev_priv->rps.max_delay)
3484 new_power = HIGH_POWER;
3485 if (new_power == dev_priv->rps.power)
3486 return;
3487
3488 /* Note the units here are not exactly 1us, but 1280ns. */
3489 switch (new_power) {
3490 case LOW_POWER:
3491 /* Upclock if more than 95% busy over 16ms */
3492 I915_WRITE(GEN6_RP_UP_EI, 12500);
3493 I915_WRITE(GEN6_RP_UP_THRESHOLD, 11800);
3494
3495 /* Downclock if less than 85% busy over 32ms */
3496 I915_WRITE(GEN6_RP_DOWN_EI, 25000);
3497 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 21250);
3498
3499 I915_WRITE(GEN6_RP_CONTROL,
3500 GEN6_RP_MEDIA_TURBO |
3501 GEN6_RP_MEDIA_HW_NORMAL_MODE |
3502 GEN6_RP_MEDIA_IS_GFX |
3503 GEN6_RP_ENABLE |
3504 GEN6_RP_UP_BUSY_AVG |
3505 GEN6_RP_DOWN_IDLE_AVG);
3506 break;
3507
3508 case BETWEEN:
3509 /* Upclock if more than 90% busy over 13ms */
3510 I915_WRITE(GEN6_RP_UP_EI, 10250);
3511 I915_WRITE(GEN6_RP_UP_THRESHOLD, 9225);
3512
3513 /* Downclock if less than 75% busy over 32ms */
3514 I915_WRITE(GEN6_RP_DOWN_EI, 25000);
3515 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 18750);
3516
3517 I915_WRITE(GEN6_RP_CONTROL,
3518 GEN6_RP_MEDIA_TURBO |
3519 GEN6_RP_MEDIA_HW_NORMAL_MODE |
3520 GEN6_RP_MEDIA_IS_GFX |
3521 GEN6_RP_ENABLE |
3522 GEN6_RP_UP_BUSY_AVG |
3523 GEN6_RP_DOWN_IDLE_AVG);
3524 break;
3525
3526 case HIGH_POWER:
3527 /* Upclock if more than 85% busy over 10ms */
3528 I915_WRITE(GEN6_RP_UP_EI, 8000);
3529 I915_WRITE(GEN6_RP_UP_THRESHOLD, 6800);
3530
3531 /* Downclock if less than 60% busy over 32ms */
3532 I915_WRITE(GEN6_RP_DOWN_EI, 25000);
3533 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 15000);
3534
3535 I915_WRITE(GEN6_RP_CONTROL,
3536 GEN6_RP_MEDIA_TURBO |
3537 GEN6_RP_MEDIA_HW_NORMAL_MODE |
3538 GEN6_RP_MEDIA_IS_GFX |
3539 GEN6_RP_ENABLE |
3540 GEN6_RP_UP_BUSY_AVG |
3541 GEN6_RP_DOWN_IDLE_AVG);
3542 break;
3543 }
3544
3545 dev_priv->rps.power = new_power;
3546 dev_priv->rps.last_adj = 0;
3547 }
3548
3549 void gen6_set_rps(struct drm_device *dev, u8 val)
3550 {
3551 struct drm_i915_private *dev_priv = dev->dev_private;
3552 u32 limits = gen6_rps_limits(dev_priv, &val);
3553
3554 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3555 WARN_ON(val > dev_priv->rps.max_delay);
3556 WARN_ON(val < dev_priv->rps.min_delay);
3557
3558 if (val == dev_priv->rps.cur_delay)
3559 return;
3560
3561 gen6_set_rps_thresholds(dev_priv, val);
3562
3563 if (IS_HASWELL(dev))
3564 I915_WRITE(GEN6_RPNSWREQ,
3565 HSW_FREQUENCY(val));
3566 else
3567 I915_WRITE(GEN6_RPNSWREQ,
3568 GEN6_FREQUENCY(val) |
3569 GEN6_OFFSET(0) |
3570 GEN6_AGGRESSIVE_TURBO);
3571
3572 /* Make sure we continue to get interrupts
3573 * until we hit the minimum or maximum frequencies.
3574 */
3575 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS, limits);
3576
3577 POSTING_READ(GEN6_RPNSWREQ);
3578
3579 dev_priv->rps.cur_delay = val;
3580
3581 trace_intel_gpu_freq_change(val * 50);
3582 }
3583
3584 void gen6_rps_idle(struct drm_i915_private *dev_priv)
3585 {
3586 mutex_lock(&dev_priv->rps.hw_lock);
3587 if (dev_priv->rps.enabled) {
3588 if (dev_priv->info->is_valleyview)
3589 valleyview_set_rps(dev_priv->dev, dev_priv->rps.min_delay);
3590 else
3591 gen6_set_rps(dev_priv->dev, dev_priv->rps.min_delay);
3592 dev_priv->rps.last_adj = 0;
3593 }
3594 mutex_unlock(&dev_priv->rps.hw_lock);
3595 }
3596
3597 void gen6_rps_boost(struct drm_i915_private *dev_priv)
3598 {
3599 mutex_lock(&dev_priv->rps.hw_lock);
3600 if (dev_priv->rps.enabled) {
3601 if (dev_priv->info->is_valleyview)
3602 valleyview_set_rps(dev_priv->dev, dev_priv->rps.max_delay);
3603 else
3604 gen6_set_rps(dev_priv->dev, dev_priv->rps.max_delay);
3605 dev_priv->rps.last_adj = 0;
3606 }
3607 mutex_unlock(&dev_priv->rps.hw_lock);
3608 }
3609
3610 /*
3611 * Wait until the previous freq change has completed,
3612 * or the timeout elapsed, and then update our notion
3613 * of the current GPU frequency.
3614 */
3615 static void vlv_update_rps_cur_delay(struct drm_i915_private *dev_priv)
3616 {
3617 u32 pval;
3618
3619 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3620
3621 if (wait_for(((pval = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS)) & GENFREQSTATUS) == 0, 10))
3622 DRM_DEBUG_DRIVER("timed out waiting for Punit\n");
3623
3624 pval >>= 8;
3625
3626 if (pval != dev_priv->rps.cur_delay)
3627 DRM_DEBUG_DRIVER("Punit overrode GPU freq: %d MHz (%u) requested, but got %d Mhz (%u)\n",
3628 vlv_gpu_freq(dev_priv->mem_freq, dev_priv->rps.cur_delay),
3629 dev_priv->rps.cur_delay,
3630 vlv_gpu_freq(dev_priv->mem_freq, pval), pval);
3631
3632 dev_priv->rps.cur_delay = pval;
3633 }
3634
3635 void valleyview_set_rps(struct drm_device *dev, u8 val)
3636 {
3637 struct drm_i915_private *dev_priv = dev->dev_private;
3638
3639 gen6_rps_limits(dev_priv, &val);
3640
3641 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3642 WARN_ON(val > dev_priv->rps.max_delay);
3643 WARN_ON(val < dev_priv->rps.min_delay);
3644
3645 vlv_update_rps_cur_delay(dev_priv);
3646
3647 DRM_DEBUG_DRIVER("GPU freq request from %d MHz (%u) to %d MHz (%u)\n",
3648 vlv_gpu_freq(dev_priv->mem_freq,
3649 dev_priv->rps.cur_delay),
3650 dev_priv->rps.cur_delay,
3651 vlv_gpu_freq(dev_priv->mem_freq, val), val);
3652
3653 if (val == dev_priv->rps.cur_delay)
3654 return;
3655
3656 vlv_punit_write(dev_priv, PUNIT_REG_GPU_FREQ_REQ, val);
3657
3658 dev_priv->rps.cur_delay = val;
3659
3660 trace_intel_gpu_freq_change(vlv_gpu_freq(dev_priv->mem_freq, val));
3661 }
3662
3663 static void gen6_disable_rps_interrupts(struct drm_device *dev)
3664 {
3665 struct drm_i915_private *dev_priv = dev->dev_private;
3666
3667 I915_WRITE(GEN6_PMINTRMSK, 0xffffffff);
3668 I915_WRITE(GEN6_PMIER, I915_READ(GEN6_PMIER) & ~GEN6_PM_RPS_EVENTS);
3669 /* Complete PM interrupt masking here doesn't race with the rps work
3670 * item again unmasking PM interrupts because that is using a different
3671 * register (PMIMR) to mask PM interrupts. The only risk is in leaving
3672 * stale bits in PMIIR and PMIMR which gen6_enable_rps will clean up. */
3673
3674 spin_lock_irq(&dev_priv->irq_lock);
3675 dev_priv->rps.pm_iir = 0;
3676 spin_unlock_irq(&dev_priv->irq_lock);
3677
3678 I915_WRITE(GEN6_PMIIR, GEN6_PM_RPS_EVENTS);
3679 }
3680
3681 static void gen6_disable_rps(struct drm_device *dev)
3682 {
3683 struct drm_i915_private *dev_priv = dev->dev_private;
3684
3685 I915_WRITE(GEN6_RC_CONTROL, 0);
3686 I915_WRITE(GEN6_RPNSWREQ, 1 << 31);
3687
3688 gen6_disable_rps_interrupts(dev);
3689 }
3690
3691 static void valleyview_disable_rps(struct drm_device *dev)
3692 {
3693 struct drm_i915_private *dev_priv = dev->dev_private;
3694
3695 I915_WRITE(GEN6_RC_CONTROL, 0);
3696
3697 gen6_disable_rps_interrupts(dev);
3698
3699 if (dev_priv->vlv_pctx) {
3700 drm_gem_object_unreference(&dev_priv->vlv_pctx->base);
3701 dev_priv->vlv_pctx = NULL;
3702 }
3703 }
3704
3705 static void intel_print_rc6_info(struct drm_device *dev, u32 mode)
3706 {
3707 if (IS_GEN6(dev))
3708 DRM_DEBUG_DRIVER("Sandybridge: deep RC6 disabled\n");
3709
3710 if (IS_HASWELL(dev))
3711 DRM_DEBUG_DRIVER("Haswell: only RC6 available\n");
3712
3713 DRM_INFO("Enabling RC6 states: RC6 %s, RC6p %s, RC6pp %s\n",
3714 (mode & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off",
3715 (mode & GEN6_RC_CTL_RC6p_ENABLE) ? "on" : "off",
3716 (mode & GEN6_RC_CTL_RC6pp_ENABLE) ? "on" : "off");
3717 }
3718
3719 int intel_enable_rc6(const struct drm_device *dev)
3720 {
3721 /* No RC6 before Ironlake */
3722 if (INTEL_INFO(dev)->gen < 5)
3723 return 0;
3724
3725 /* Respect the kernel parameter if it is set */
3726 if (i915_enable_rc6 >= 0)
3727 return i915_enable_rc6;
3728
3729 /* Disable RC6 on Ironlake */
3730 if (INTEL_INFO(dev)->gen == 5)
3731 return 0;
3732
3733 if (IS_HASWELL(dev))
3734 return INTEL_RC6_ENABLE;
3735
3736 /* snb/ivb have more than one rc6 state. */
3737 if (INTEL_INFO(dev)->gen == 6)
3738 return INTEL_RC6_ENABLE;
3739
3740 return (INTEL_RC6_ENABLE | INTEL_RC6p_ENABLE);
3741 }
3742
3743 static void gen6_enable_rps_interrupts(struct drm_device *dev)
3744 {
3745 struct drm_i915_private *dev_priv = dev->dev_private;
3746 u32 enabled_intrs;
3747
3748 spin_lock_irq(&dev_priv->irq_lock);
3749 WARN_ON(dev_priv->rps.pm_iir);
3750 snb_enable_pm_irq(dev_priv, GEN6_PM_RPS_EVENTS);
3751 I915_WRITE(GEN6_PMIIR, GEN6_PM_RPS_EVENTS);
3752 spin_unlock_irq(&dev_priv->irq_lock);
3753
3754 /* only unmask PM interrupts we need. Mask all others. */
3755 enabled_intrs = GEN6_PM_RPS_EVENTS;
3756
3757 /* IVB and SNB hard hangs on looping batchbuffer
3758 * if GEN6_PM_UP_EI_EXPIRED is masked.
3759 */
3760 if (INTEL_INFO(dev)->gen <= 7 && !IS_HASWELL(dev))
3761 enabled_intrs |= GEN6_PM_RP_UP_EI_EXPIRED;
3762
3763 I915_WRITE(GEN6_PMINTRMSK, ~enabled_intrs);
3764 }
3765
3766 static void gen8_enable_rps(struct drm_device *dev)
3767 {
3768 struct drm_i915_private *dev_priv = dev->dev_private;
3769 struct intel_ring_buffer *ring;
3770 uint32_t rc6_mask = 0, rp_state_cap;
3771 int unused;
3772
3773 /* 1a: Software RC state - RC0 */
3774 I915_WRITE(GEN6_RC_STATE, 0);
3775
3776 /* 1c & 1d: Get forcewake during program sequence. Although the driver
3777 * hasn't enabled a state yet where we need forcewake, BIOS may have.*/
3778 gen6_gt_force_wake_get(dev_priv);
3779
3780 /* 2a: Disable RC states. */
3781 I915_WRITE(GEN6_RC_CONTROL, 0);
3782
3783 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
3784
3785 /* 2b: Program RC6 thresholds.*/
3786 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16);
3787 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000); /* 12500 * 1280ns */
3788 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25); /* 25 * 1280ns */
3789 for_each_ring(ring, dev_priv, unused)
3790 I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
3791 I915_WRITE(GEN6_RC_SLEEP, 0);
3792 I915_WRITE(GEN6_RC6_THRESHOLD, 50000); /* 50/125ms per EI */
3793
3794 /* 3: Enable RC6 */
3795 if (intel_enable_rc6(dev) & INTEL_RC6_ENABLE)
3796 rc6_mask = GEN6_RC_CTL_RC6_ENABLE;
3797 DRM_INFO("RC6 %s\n", (rc6_mask & GEN6_RC_CTL_RC6_ENABLE) ? "on" : "off");
3798 I915_WRITE(GEN6_RC_CONTROL, GEN6_RC_CTL_HW_ENABLE |
3799 GEN6_RC_CTL_EI_MODE(1) |
3800 rc6_mask);
3801
3802 /* 4 Program defaults and thresholds for RPS*/
3803 I915_WRITE(GEN6_RPNSWREQ, HSW_FREQUENCY(10)); /* Request 500 MHz */
3804 I915_WRITE(GEN6_RC_VIDEO_FREQ, HSW_FREQUENCY(12)); /* Request 600 MHz */
3805 /* NB: Docs say 1s, and 1000000 - which aren't equivalent */
3806 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 100000000 / 128); /* 1 second timeout */
3807
3808 /* Docs recommend 900MHz, and 300 MHz respectively */
3809 I915_WRITE(GEN6_RP_INTERRUPT_LIMITS,
3810 dev_priv->rps.max_delay << 24 |
3811 dev_priv->rps.min_delay << 16);
3812
3813 I915_WRITE(GEN6_RP_UP_THRESHOLD, 7600000 / 128); /* 76ms busyness per EI, 90% */
3814 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 31300000 / 128); /* 313ms busyness per EI, 70%*/
3815 I915_WRITE(GEN6_RP_UP_EI, 66000); /* 84.48ms, XXX: random? */
3816 I915_WRITE(GEN6_RP_DOWN_EI, 350000); /* 448ms, XXX: random? */
3817
3818 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
3819
3820 /* 5: Enable RPS */
3821 I915_WRITE(GEN6_RP_CONTROL,
3822 GEN6_RP_MEDIA_TURBO |
3823 GEN6_RP_MEDIA_HW_NORMAL_MODE |
3824 GEN6_RP_MEDIA_IS_GFX |
3825 GEN6_RP_ENABLE |
3826 GEN6_RP_UP_BUSY_AVG |
3827 GEN6_RP_DOWN_IDLE_AVG);
3828
3829 /* 6: Ring frequency + overclocking (our driver does this later */
3830
3831 gen6_set_rps(dev, (I915_READ(GEN6_GT_PERF_STATUS) & 0xff00) >> 8);
3832
3833 gen6_enable_rps_interrupts(dev);
3834
3835 gen6_gt_force_wake_put(dev_priv);
3836 }
3837
3838 static void gen6_enable_rps(struct drm_device *dev)
3839 {
3840 struct drm_i915_private *dev_priv = dev->dev_private;
3841 struct intel_ring_buffer *ring;
3842 u32 rp_state_cap;
3843 u32 gt_perf_status;
3844 u32 rc6vids, pcu_mbox, rc6_mask = 0;
3845 u32 gtfifodbg;
3846 int rc6_mode;
3847 int i, ret;
3848
3849 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3850
3851 /* Here begins a magic sequence of register writes to enable
3852 * auto-downclocking.
3853 *
3854 * Perhaps there might be some value in exposing these to
3855 * userspace...
3856 */
3857 I915_WRITE(GEN6_RC_STATE, 0);
3858
3859 /* Clear the DBG now so we don't confuse earlier errors */
3860 if ((gtfifodbg = I915_READ(GTFIFODBG))) {
3861 DRM_ERROR("GT fifo had a previous error %x\n", gtfifodbg);
3862 I915_WRITE(GTFIFODBG, gtfifodbg);
3863 }
3864
3865 gen6_gt_force_wake_get(dev_priv);
3866
3867 rp_state_cap = I915_READ(GEN6_RP_STATE_CAP);
3868 gt_perf_status = I915_READ(GEN6_GT_PERF_STATUS);
3869
3870 /* In units of 50MHz */
3871 dev_priv->rps.hw_max = dev_priv->rps.max_delay = rp_state_cap & 0xff;
3872 dev_priv->rps.min_delay = (rp_state_cap >> 16) & 0xff;
3873 dev_priv->rps.rp1_delay = (rp_state_cap >> 8) & 0xff;
3874 dev_priv->rps.rp0_delay = (rp_state_cap >> 0) & 0xff;
3875 dev_priv->rps.rpe_delay = dev_priv->rps.rp1_delay;
3876 dev_priv->rps.cur_delay = 0;
3877
3878 /* disable the counters and set deterministic thresholds */
3879 I915_WRITE(GEN6_RC_CONTROL, 0);
3880
3881 I915_WRITE(GEN6_RC1_WAKE_RATE_LIMIT, 1000 << 16);
3882 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 40 << 16 | 30);
3883 I915_WRITE(GEN6_RC6pp_WAKE_RATE_LIMIT, 30);
3884 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
3885 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
3886
3887 for_each_ring(ring, dev_priv, i)
3888 I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
3889
3890 I915_WRITE(GEN6_RC_SLEEP, 0);
3891 I915_WRITE(GEN6_RC1e_THRESHOLD, 1000);
3892 if (IS_IVYBRIDGE(dev))
3893 I915_WRITE(GEN6_RC6_THRESHOLD, 125000);
3894 else
3895 I915_WRITE(GEN6_RC6_THRESHOLD, 50000);
3896 I915_WRITE(GEN6_RC6p_THRESHOLD, 150000);
3897 I915_WRITE(GEN6_RC6pp_THRESHOLD, 64000); /* unused */
3898
3899 /* Check if we are enabling RC6 */
3900 rc6_mode = intel_enable_rc6(dev_priv->dev);
3901 if (rc6_mode & INTEL_RC6_ENABLE)
3902 rc6_mask |= GEN6_RC_CTL_RC6_ENABLE;
3903
3904 /* We don't use those on Haswell */
3905 if (!IS_HASWELL(dev)) {
3906 if (rc6_mode & INTEL_RC6p_ENABLE)
3907 rc6_mask |= GEN6_RC_CTL_RC6p_ENABLE;
3908
3909 if (rc6_mode & INTEL_RC6pp_ENABLE)
3910 rc6_mask |= GEN6_RC_CTL_RC6pp_ENABLE;
3911 }
3912
3913 intel_print_rc6_info(dev, rc6_mask);
3914
3915 I915_WRITE(GEN6_RC_CONTROL,
3916 rc6_mask |
3917 GEN6_RC_CTL_EI_MODE(1) |
3918 GEN6_RC_CTL_HW_ENABLE);
3919
3920 /* Power down if completely idle for over 50ms */
3921 I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 50000);
3922 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
3923
3924 ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_MIN_FREQ_TABLE, 0);
3925 if (!ret) {
3926 pcu_mbox = 0;
3927 ret = sandybridge_pcode_read(dev_priv, GEN6_READ_OC_PARAMS, &pcu_mbox);
3928 if (!ret && (pcu_mbox & (1<<31))) { /* OC supported */
3929 DRM_DEBUG_DRIVER("Overclocking supported. Max: %dMHz, Overclock max: %dMHz\n",
3930 (dev_priv->rps.max_delay & 0xff) * 50,
3931 (pcu_mbox & 0xff) * 50);
3932 dev_priv->rps.hw_max = pcu_mbox & 0xff;
3933 }
3934 } else {
3935 DRM_DEBUG_DRIVER("Failed to set the min frequency\n");
3936 }
3937
3938 dev_priv->rps.power = HIGH_POWER; /* force a reset */
3939 gen6_set_rps(dev_priv->dev, dev_priv->rps.min_delay);
3940
3941 gen6_enable_rps_interrupts(dev);
3942
3943 rc6vids = 0;
3944 ret = sandybridge_pcode_read(dev_priv, GEN6_PCODE_READ_RC6VIDS, &rc6vids);
3945 if (IS_GEN6(dev) && ret) {
3946 DRM_DEBUG_DRIVER("Couldn't check for BIOS workaround\n");
3947 } else if (IS_GEN6(dev) && (GEN6_DECODE_RC6_VID(rc6vids & 0xff) < 450)) {
3948 DRM_DEBUG_DRIVER("You should update your BIOS. Correcting minimum rc6 voltage (%dmV->%dmV)\n",
3949 GEN6_DECODE_RC6_VID(rc6vids & 0xff), 450);
3950 rc6vids &= 0xffff00;
3951 rc6vids |= GEN6_ENCODE_RC6_VID(450);
3952 ret = sandybridge_pcode_write(dev_priv, GEN6_PCODE_WRITE_RC6VIDS, rc6vids);
3953 if (ret)
3954 DRM_ERROR("Couldn't fix incorrect rc6 voltage\n");
3955 }
3956
3957 gen6_gt_force_wake_put(dev_priv);
3958 }
3959
3960 void gen6_update_ring_freq(struct drm_device *dev)
3961 {
3962 struct drm_i915_private *dev_priv = dev->dev_private;
3963 int min_freq = 15;
3964 unsigned int gpu_freq;
3965 unsigned int max_ia_freq, min_ring_freq;
3966 int scaling_factor = 180;
3967 struct cpufreq_policy *policy;
3968
3969 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
3970
3971 policy = cpufreq_cpu_get(0);
3972 if (policy) {
3973 max_ia_freq = policy->cpuinfo.max_freq;
3974 cpufreq_cpu_put(policy);
3975 } else {
3976 /*
3977 * Default to measured freq if none found, PCU will ensure we
3978 * don't go over
3979 */
3980 max_ia_freq = tsc_khz;
3981 }
3982
3983 /* Convert from kHz to MHz */
3984 max_ia_freq /= 1000;
3985
3986 min_ring_freq = I915_READ(DCLK) & 0xf;
3987 /* convert DDR frequency from units of 266.6MHz to bandwidth */
3988 min_ring_freq = mult_frac(min_ring_freq, 8, 3);
3989
3990 /*
3991 * For each potential GPU frequency, load a ring frequency we'd like
3992 * to use for memory access. We do this by specifying the IA frequency
3993 * the PCU should use as a reference to determine the ring frequency.
3994 */
3995 for (gpu_freq = dev_priv->rps.max_delay; gpu_freq >= dev_priv->rps.min_delay;
3996 gpu_freq--) {
3997 int diff = dev_priv->rps.max_delay - gpu_freq;
3998 unsigned int ia_freq = 0, ring_freq = 0;
3999
4000 if (INTEL_INFO(dev)->gen >= 8) {
4001 /* max(2 * GT, DDR). NB: GT is 50MHz units */
4002 ring_freq = max(min_ring_freq, gpu_freq);
4003 } else if (IS_HASWELL(dev)) {
4004 ring_freq = mult_frac(gpu_freq, 5, 4);
4005 ring_freq = max(min_ring_freq, ring_freq);
4006 /* leave ia_freq as the default, chosen by cpufreq */
4007 } else {
4008 /* On older processors, there is no separate ring
4009 * clock domain, so in order to boost the bandwidth
4010 * of the ring, we need to upclock the CPU (ia_freq).
4011 *
4012 * For GPU frequencies less than 750MHz,
4013 * just use the lowest ring freq.
4014 */
4015 if (gpu_freq < min_freq)
4016 ia_freq = 800;
4017 else
4018 ia_freq = max_ia_freq - ((diff * scaling_factor) / 2);
4019 ia_freq = DIV_ROUND_CLOSEST(ia_freq, 100);
4020 }
4021
4022 sandybridge_pcode_write(dev_priv,
4023 GEN6_PCODE_WRITE_MIN_FREQ_TABLE,
4024 ia_freq << GEN6_PCODE_FREQ_IA_RATIO_SHIFT |
4025 ring_freq << GEN6_PCODE_FREQ_RING_RATIO_SHIFT |
4026 gpu_freq);
4027 }
4028 }
4029
4030 int valleyview_rps_max_freq(struct drm_i915_private *dev_priv)
4031 {
4032 u32 val, rp0;
4033
4034 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FREQ_FUSE);
4035
4036 rp0 = (val & FB_GFX_MAX_FREQ_FUSE_MASK) >> FB_GFX_MAX_FREQ_FUSE_SHIFT;
4037 /* Clamp to max */
4038 rp0 = min_t(u32, rp0, 0xea);
4039
4040 return rp0;
4041 }
4042
4043 static int valleyview_rps_rpe_freq(struct drm_i915_private *dev_priv)
4044 {
4045 u32 val, rpe;
4046
4047 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_LO);
4048 rpe = (val & FB_FMAX_VMIN_FREQ_LO_MASK) >> FB_FMAX_VMIN_FREQ_LO_SHIFT;
4049 val = vlv_nc_read(dev_priv, IOSF_NC_FB_GFX_FMAX_FUSE_HI);
4050 rpe |= (val & FB_FMAX_VMIN_FREQ_HI_MASK) << 5;
4051
4052 return rpe;
4053 }
4054
4055 int valleyview_rps_min_freq(struct drm_i915_private *dev_priv)
4056 {
4057 return vlv_punit_read(dev_priv, PUNIT_REG_GPU_LFM) & 0xff;
4058 }
4059
4060 static void valleyview_setup_pctx(struct drm_device *dev)
4061 {
4062 struct drm_i915_private *dev_priv = dev->dev_private;
4063 struct drm_i915_gem_object *pctx;
4064 unsigned long pctx_paddr;
4065 u32 pcbr;
4066 int pctx_size = 24*1024;
4067
4068 pcbr = I915_READ(VLV_PCBR);
4069 if (pcbr) {
4070 /* BIOS set it up already, grab the pre-alloc'd space */
4071 int pcbr_offset;
4072
4073 pcbr_offset = (pcbr & (~4095)) - dev_priv->mm.stolen_base;
4074 pctx = i915_gem_object_create_stolen_for_preallocated(dev_priv->dev,
4075 pcbr_offset,
4076 I915_GTT_OFFSET_NONE,
4077 pctx_size);
4078 goto out;
4079 }
4080
4081 /*
4082 * From the Gunit register HAS:
4083 * The Gfx driver is expected to program this register and ensure
4084 * proper allocation within Gfx stolen memory. For example, this
4085 * register should be programmed such than the PCBR range does not
4086 * overlap with other ranges, such as the frame buffer, protected
4087 * memory, or any other relevant ranges.
4088 */
4089 pctx = i915_gem_object_create_stolen(dev, pctx_size);
4090 if (!pctx) {
4091 DRM_DEBUG("not enough stolen space for PCTX, disabling\n");
4092 return;
4093 }
4094
4095 pctx_paddr = dev_priv->mm.stolen_base + pctx->stolen->start;
4096 I915_WRITE(VLV_PCBR, pctx_paddr);
4097
4098 out:
4099 dev_priv->vlv_pctx = pctx;
4100 }
4101
4102 static void valleyview_enable_rps(struct drm_device *dev)
4103 {
4104 struct drm_i915_private *dev_priv = dev->dev_private;
4105 struct intel_ring_buffer *ring;
4106 u32 gtfifodbg, val, rc6_mode = 0;
4107 int i;
4108
4109 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
4110
4111 if ((gtfifodbg = I915_READ(GTFIFODBG))) {
4112 DRM_DEBUG_DRIVER("GT fifo had a previous error %x\n",
4113 gtfifodbg);
4114 I915_WRITE(GTFIFODBG, gtfifodbg);
4115 }
4116
4117 valleyview_setup_pctx(dev);
4118
4119 gen6_gt_force_wake_get(dev_priv);
4120
4121 I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
4122 I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
4123 I915_WRITE(GEN6_RP_UP_EI, 66000);
4124 I915_WRITE(GEN6_RP_DOWN_EI, 350000);
4125
4126 I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
4127
4128 I915_WRITE(GEN6_RP_CONTROL,
4129 GEN6_RP_MEDIA_TURBO |
4130 GEN6_RP_MEDIA_HW_NORMAL_MODE |
4131 GEN6_RP_MEDIA_IS_GFX |
4132 GEN6_RP_ENABLE |
4133 GEN6_RP_UP_BUSY_AVG |
4134 GEN6_RP_DOWN_IDLE_CONT);
4135
4136 I915_WRITE(GEN6_RC6_WAKE_RATE_LIMIT, 0x00280000);
4137 I915_WRITE(GEN6_RC_EVALUATION_INTERVAL, 125000);
4138 I915_WRITE(GEN6_RC_IDLE_HYSTERSIS, 25);
4139
4140 for_each_ring(ring, dev_priv, i)
4141 I915_WRITE(RING_MAX_IDLE(ring->mmio_base), 10);
4142
4143 I915_WRITE(GEN6_RC6_THRESHOLD, 0xc350);
4144
4145 /* allows RC6 residency counter to work */
4146 I915_WRITE(VLV_COUNTER_CONTROL,
4147 _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH |
4148 VLV_MEDIA_RC6_COUNT_EN |
4149 VLV_RENDER_RC6_COUNT_EN));
4150 if (intel_enable_rc6(dev) & INTEL_RC6_ENABLE)
4151 rc6_mode = GEN7_RC_CTL_TO_MODE;
4152
4153 intel_print_rc6_info(dev, rc6_mode);
4154
4155 I915_WRITE(GEN6_RC_CONTROL, rc6_mode);
4156
4157 val = vlv_punit_read(dev_priv, PUNIT_REG_GPU_FREQ_STS);
4158 switch ((val >> 6) & 3) {
4159 case 0:
4160 case 1:
4161 dev_priv->mem_freq = 800;
4162 break;
4163 case 2:
4164 dev_priv->mem_freq = 1066;
4165 break;
4166 case 3:
4167 dev_priv->mem_freq = 1333;
4168 break;
4169 }
4170 DRM_DEBUG_DRIVER("DDR speed: %d MHz", dev_priv->mem_freq);
4171
4172 DRM_DEBUG_DRIVER("GPLL enabled? %s\n", val & 0x10 ? "yes" : "no");
4173 DRM_DEBUG_DRIVER("GPU status: 0x%08x\n", val);
4174
4175 dev_priv->rps.cur_delay = (val >> 8) & 0xff;
4176 DRM_DEBUG_DRIVER("current GPU freq: %d MHz (%u)\n",
4177 vlv_gpu_freq(dev_priv->mem_freq,
4178 dev_priv->rps.cur_delay),
4179 dev_priv->rps.cur_delay);
4180
4181 dev_priv->rps.max_delay = valleyview_rps_max_freq(dev_priv);
4182 dev_priv->rps.hw_max = dev_priv->rps.max_delay;
4183 DRM_DEBUG_DRIVER("max GPU freq: %d MHz (%u)\n",
4184 vlv_gpu_freq(dev_priv->mem_freq,
4185 dev_priv->rps.max_delay),
4186 dev_priv->rps.max_delay);
4187
4188 dev_priv->rps.rpe_delay = valleyview_rps_rpe_freq(dev_priv);
4189 DRM_DEBUG_DRIVER("RPe GPU freq: %d MHz (%u)\n",
4190 vlv_gpu_freq(dev_priv->mem_freq,
4191 dev_priv->rps.rpe_delay),
4192 dev_priv->rps.rpe_delay);
4193
4194 dev_priv->rps.min_delay = valleyview_rps_min_freq(dev_priv);
4195 DRM_DEBUG_DRIVER("min GPU freq: %d MHz (%u)\n",
4196 vlv_gpu_freq(dev_priv->mem_freq,
4197 dev_priv->rps.min_delay),
4198 dev_priv->rps.min_delay);
4199
4200 DRM_DEBUG_DRIVER("setting GPU freq to %d MHz (%u)\n",
4201 vlv_gpu_freq(dev_priv->mem_freq,
4202 dev_priv->rps.rpe_delay),
4203 dev_priv->rps.rpe_delay);
4204
4205 valleyview_set_rps(dev_priv->dev, dev_priv->rps.rpe_delay);
4206
4207 gen6_enable_rps_interrupts(dev);
4208
4209 gen6_gt_force_wake_put(dev_priv);
4210 }
4211
4212 void ironlake_teardown_rc6(struct drm_device *dev)
4213 {
4214 struct drm_i915_private *dev_priv = dev->dev_private;
4215
4216 if (dev_priv->ips.renderctx) {
4217 i915_gem_object_unpin(dev_priv->ips.renderctx);
4218 drm_gem_object_unreference(&dev_priv->ips.renderctx->base);
4219 dev_priv->ips.renderctx = NULL;
4220 }
4221
4222 if (dev_priv->ips.pwrctx) {
4223 i915_gem_object_unpin(dev_priv->ips.pwrctx);
4224 drm_gem_object_unreference(&dev_priv->ips.pwrctx->base);
4225 dev_priv->ips.pwrctx = NULL;
4226 }
4227 }
4228
4229 static void ironlake_disable_rc6(struct drm_device *dev)
4230 {
4231 struct drm_i915_private *dev_priv = dev->dev_private;
4232
4233 if (I915_READ(PWRCTXA)) {
4234 /* Wake the GPU, prevent RC6, then restore RSTDBYCTL */
4235 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) | RCX_SW_EXIT);
4236 wait_for(((I915_READ(RSTDBYCTL) & RSX_STATUS_MASK) == RSX_STATUS_ON),
4237 50);
4238
4239 I915_WRITE(PWRCTXA, 0);
4240 POSTING_READ(PWRCTXA);
4241
4242 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
4243 POSTING_READ(RSTDBYCTL);
4244 }
4245 }
4246
4247 static int ironlake_setup_rc6(struct drm_device *dev)
4248 {
4249 struct drm_i915_private *dev_priv = dev->dev_private;
4250
4251 if (dev_priv->ips.renderctx == NULL)
4252 dev_priv->ips.renderctx = intel_alloc_context_page(dev);
4253 if (!dev_priv->ips.renderctx)
4254 return -ENOMEM;
4255
4256 if (dev_priv->ips.pwrctx == NULL)
4257 dev_priv->ips.pwrctx = intel_alloc_context_page(dev);
4258 if (!dev_priv->ips.pwrctx) {
4259 ironlake_teardown_rc6(dev);
4260 return -ENOMEM;
4261 }
4262
4263 return 0;
4264 }
4265
4266 static void ironlake_enable_rc6(struct drm_device *dev)
4267 {
4268 struct drm_i915_private *dev_priv = dev->dev_private;
4269 struct intel_ring_buffer *ring = &dev_priv->ring[RCS];
4270 bool was_interruptible;
4271 int ret;
4272
4273 /* rc6 disabled by default due to repeated reports of hanging during
4274 * boot and resume.
4275 */
4276 if (!intel_enable_rc6(dev))
4277 return;
4278
4279 WARN_ON(!mutex_is_locked(&dev->struct_mutex));
4280
4281 ret = ironlake_setup_rc6(dev);
4282 if (ret)
4283 return;
4284
4285 was_interruptible = dev_priv->mm.interruptible;
4286 dev_priv->mm.interruptible = false;
4287
4288 /*
4289 * GPU can automatically power down the render unit if given a page
4290 * to save state.
4291 */
4292 ret = intel_ring_begin(ring, 6);
4293 if (ret) {
4294 ironlake_teardown_rc6(dev);
4295 dev_priv->mm.interruptible = was_interruptible;
4296 return;
4297 }
4298
4299 intel_ring_emit(ring, MI_SUSPEND_FLUSH | MI_SUSPEND_FLUSH_EN);
4300 intel_ring_emit(ring, MI_SET_CONTEXT);
4301 intel_ring_emit(ring, i915_gem_obj_ggtt_offset(dev_priv->ips.renderctx) |
4302 MI_MM_SPACE_GTT |
4303 MI_SAVE_EXT_STATE_EN |
4304 MI_RESTORE_EXT_STATE_EN |
4305 MI_RESTORE_INHIBIT);
4306 intel_ring_emit(ring, MI_SUSPEND_FLUSH);
4307 intel_ring_emit(ring, MI_NOOP);
4308 intel_ring_emit(ring, MI_FLUSH);
4309 intel_ring_advance(ring);
4310
4311 /*
4312 * Wait for the command parser to advance past MI_SET_CONTEXT. The HW
4313 * does an implicit flush, combined with MI_FLUSH above, it should be
4314 * safe to assume that renderctx is valid
4315 */
4316 ret = intel_ring_idle(ring);
4317 dev_priv->mm.interruptible = was_interruptible;
4318 if (ret) {
4319 DRM_ERROR("failed to enable ironlake power savings\n");
4320 ironlake_teardown_rc6(dev);
4321 return;
4322 }
4323
4324 I915_WRITE(PWRCTXA, i915_gem_obj_ggtt_offset(dev_priv->ips.pwrctx) | PWRCTX_EN);
4325 I915_WRITE(RSTDBYCTL, I915_READ(RSTDBYCTL) & ~RCX_SW_EXIT);
4326
4327 intel_print_rc6_info(dev, INTEL_RC6_ENABLE);
4328 }
4329
4330 static unsigned long intel_pxfreq(u32 vidfreq)
4331 {
4332 unsigned long freq;
4333 int div = (vidfreq & 0x3f0000) >> 16;
4334 int post = (vidfreq & 0x3000) >> 12;
4335 int pre = (vidfreq & 0x7);
4336
4337 if (!pre)
4338 return 0;
4339
4340 freq = ((div * 133333) / ((1<<post) * pre));
4341
4342 return freq;
4343 }
4344
4345 static const struct cparams {
4346 u16 i;
4347 u16 t;
4348 u16 m;
4349 u16 c;
4350 } cparams[] = {
4351 { 1, 1333, 301, 28664 },
4352 { 1, 1066, 294, 24460 },
4353 { 1, 800, 294, 25192 },
4354 { 0, 1333, 276, 27605 },
4355 { 0, 1066, 276, 27605 },
4356 { 0, 800, 231, 23784 },
4357 };
4358
4359 static unsigned long __i915_chipset_val(struct drm_i915_private *dev_priv)
4360 {
4361 u64 total_count, diff, ret;
4362 u32 count1, count2, count3, m = 0, c = 0;
4363 unsigned long now = jiffies_to_msecs(jiffies), diff1;
4364 int i;
4365
4366 assert_spin_locked(&mchdev_lock);
4367
4368 diff1 = now - dev_priv->ips.last_time1;
4369
4370 /* Prevent division-by-zero if we are asking too fast.
4371 * Also, we don't get interesting results if we are polling
4372 * faster than once in 10ms, so just return the saved value
4373 * in such cases.
4374 */
4375 if (diff1 <= 10)
4376 return dev_priv->ips.chipset_power;
4377
4378 count1 = I915_READ(DMIEC);
4379 count2 = I915_READ(DDREC);
4380 count3 = I915_READ(CSIEC);
4381
4382 total_count = count1 + count2 + count3;
4383
4384 /* FIXME: handle per-counter overflow */
4385 if (total_count < dev_priv->ips.last_count1) {
4386 diff = ~0UL - dev_priv->ips.last_count1;
4387 diff += total_count;
4388 } else {
4389 diff = total_count - dev_priv->ips.last_count1;
4390 }
4391
4392 for (i = 0; i < ARRAY_SIZE(cparams); i++) {
4393 if (cparams[i].i == dev_priv->ips.c_m &&
4394 cparams[i].t == dev_priv->ips.r_t) {
4395 m = cparams[i].m;
4396 c = cparams[i].c;
4397 break;
4398 }
4399 }
4400
4401 diff = div_u64(diff, diff1);
4402 ret = ((m * diff) + c);
4403 ret = div_u64(ret, 10);
4404
4405 dev_priv->ips.last_count1 = total_count;
4406 dev_priv->ips.last_time1 = now;
4407
4408 dev_priv->ips.chipset_power = ret;
4409
4410 return ret;
4411 }
4412
4413 unsigned long i915_chipset_val(struct drm_i915_private *dev_priv)
4414 {
4415 unsigned long val;
4416
4417 if (dev_priv->info->gen != 5)
4418 return 0;
4419
4420 spin_lock_irq(&mchdev_lock);
4421
4422 val = __i915_chipset_val(dev_priv);
4423
4424 spin_unlock_irq(&mchdev_lock);
4425
4426 return val;
4427 }
4428
4429 unsigned long i915_mch_val(struct drm_i915_private *dev_priv)
4430 {
4431 unsigned long m, x, b;
4432 u32 tsfs;
4433
4434 tsfs = I915_READ(TSFS);
4435
4436 m = ((tsfs & TSFS_SLOPE_MASK) >> TSFS_SLOPE_SHIFT);
4437 x = I915_READ8(TR1);
4438
4439 b = tsfs & TSFS_INTR_MASK;
4440
4441 return ((m * x) / 127) - b;
4442 }
4443
4444 static u16 pvid_to_extvid(struct drm_i915_private *dev_priv, u8 pxvid)
4445 {
4446 static const struct v_table {
4447 u16 vd; /* in .1 mil */
4448 u16 vm; /* in .1 mil */
4449 } v_table[] = {
4450 { 0, 0, },
4451 { 375, 0, },
4452 { 500, 0, },
4453 { 625, 0, },
4454 { 750, 0, },
4455 { 875, 0, },
4456 { 1000, 0, },
4457 { 1125, 0, },
4458 { 4125, 3000, },
4459 { 4125, 3000, },
4460 { 4125, 3000, },
4461 { 4125, 3000, },
4462 { 4125, 3000, },
4463 { 4125, 3000, },
4464 { 4125, 3000, },
4465 { 4125, 3000, },
4466 { 4125, 3000, },
4467 { 4125, 3000, },
4468 { 4125, 3000, },
4469 { 4125, 3000, },
4470 { 4125, 3000, },
4471 { 4125, 3000, },
4472 { 4125, 3000, },
4473 { 4125, 3000, },
4474 { 4125, 3000, },
4475 { 4125, 3000, },
4476 { 4125, 3000, },
4477 { 4125, 3000, },
4478 { 4125, 3000, },
4479 { 4125, 3000, },
4480 { 4125, 3000, },
4481 { 4125, 3000, },
4482 { 4250, 3125, },
4483 { 4375, 3250, },
4484 { 4500, 3375, },
4485 { 4625, 3500, },
4486 { 4750, 3625, },
4487 { 4875, 3750, },
4488 { 5000, 3875, },
4489 { 5125, 4000, },
4490 { 5250, 4125, },
4491 { 5375, 4250, },
4492 { 5500, 4375, },
4493 { 5625, 4500, },
4494 { 5750, 4625, },
4495 { 5875, 4750, },
4496 { 6000, 4875, },
4497 { 6125, 5000, },
4498 { 6250, 5125, },
4499 { 6375, 5250, },
4500 { 6500, 5375, },
4501 { 6625, 5500, },
4502 { 6750, 5625, },
4503 { 6875, 5750, },
4504 { 7000, 5875, },
4505 { 7125, 6000, },
4506 { 7250, 6125, },
4507 { 7375, 6250, },
4508 { 7500, 6375, },
4509 { 7625, 6500, },
4510 { 7750, 6625, },
4511 { 7875, 6750, },
4512 { 8000, 6875, },
4513 { 8125, 7000, },
4514 { 8250, 7125, },
4515 { 8375, 7250, },
4516 { 8500, 7375, },
4517 { 8625, 7500, },
4518 { 8750, 7625, },
4519 { 8875, 7750, },
4520 { 9000, 7875, },
4521 { 9125, 8000, },
4522 { 9250, 8125, },
4523 { 9375, 8250, },
4524 { 9500, 8375, },
4525 { 9625, 8500, },
4526 { 9750, 8625, },
4527 { 9875, 8750, },
4528 { 10000, 8875, },
4529 { 10125, 9000, },
4530 { 10250, 9125, },
4531 { 10375, 9250, },
4532 { 10500, 9375, },
4533 { 10625, 9500, },
4534 { 10750, 9625, },
4535 { 10875, 9750, },
4536 { 11000, 9875, },
4537 { 11125, 10000, },
4538 { 11250, 10125, },
4539 { 11375, 10250, },
4540 { 11500, 10375, },
4541 { 11625, 10500, },
4542 { 11750, 10625, },
4543 { 11875, 10750, },
4544 { 12000, 10875, },
4545 { 12125, 11000, },
4546 { 12250, 11125, },
4547 { 12375, 11250, },
4548 { 12500, 11375, },
4549 { 12625, 11500, },
4550 { 12750, 11625, },
4551 { 12875, 11750, },
4552 { 13000, 11875, },
4553 { 13125, 12000, },
4554 { 13250, 12125, },
4555 { 13375, 12250, },
4556 { 13500, 12375, },
4557 { 13625, 12500, },
4558 { 13750, 12625, },
4559 { 13875, 12750, },
4560 { 14000, 12875, },
4561 { 14125, 13000, },
4562 { 14250, 13125, },
4563 { 14375, 13250, },
4564 { 14500, 13375, },
4565 { 14625, 13500, },
4566 { 14750, 13625, },
4567 { 14875, 13750, },
4568 { 15000, 13875, },
4569 { 15125, 14000, },
4570 { 15250, 14125, },
4571 { 15375, 14250, },
4572 { 15500, 14375, },
4573 { 15625, 14500, },
4574 { 15750, 14625, },
4575 { 15875, 14750, },
4576 { 16000, 14875, },
4577 { 16125, 15000, },
4578 };
4579 if (dev_priv->info->is_mobile)
4580 return v_table[pxvid].vm;
4581 else
4582 return v_table[pxvid].vd;
4583 }
4584
4585 static void __i915_update_gfx_val(struct drm_i915_private *dev_priv)
4586 {
4587 struct timespec now, diff1;
4588 u64 diff;
4589 unsigned long diffms;
4590 u32 count;
4591
4592 assert_spin_locked(&mchdev_lock);
4593
4594 getrawmonotonic(&now);
4595 diff1 = timespec_sub(now, dev_priv->ips.last_time2);
4596
4597 /* Don't divide by 0 */
4598 diffms = diff1.tv_sec * 1000 + diff1.tv_nsec / 1000000;
4599 if (!diffms)
4600 return;
4601
4602 count = I915_READ(GFXEC);
4603
4604 if (count < dev_priv->ips.last_count2) {
4605 diff = ~0UL - dev_priv->ips.last_count2;
4606 diff += count;
4607 } else {
4608 diff = count - dev_priv->ips.last_count2;
4609 }
4610
4611 dev_priv->ips.last_count2 = count;
4612 dev_priv->ips.last_time2 = now;
4613
4614 /* More magic constants... */
4615 diff = diff * 1181;
4616 diff = div_u64(diff, diffms * 10);
4617 dev_priv->ips.gfx_power = diff;
4618 }
4619
4620 void i915_update_gfx_val(struct drm_i915_private *dev_priv)
4621 {
4622 if (dev_priv->info->gen != 5)
4623 return;
4624
4625 spin_lock_irq(&mchdev_lock);
4626
4627 __i915_update_gfx_val(dev_priv);
4628
4629 spin_unlock_irq(&mchdev_lock);
4630 }
4631
4632 static unsigned long __i915_gfx_val(struct drm_i915_private *dev_priv)
4633 {
4634 unsigned long t, corr, state1, corr2, state2;
4635 u32 pxvid, ext_v;
4636
4637 assert_spin_locked(&mchdev_lock);
4638
4639 pxvid = I915_READ(PXVFREQ_BASE + (dev_priv->rps.cur_delay * 4));
4640 pxvid = (pxvid >> 24) & 0x7f;
4641 ext_v = pvid_to_extvid(dev_priv, pxvid);
4642
4643 state1 = ext_v;
4644
4645 t = i915_mch_val(dev_priv);
4646
4647 /* Revel in the empirically derived constants */
4648
4649 /* Correction factor in 1/100000 units */
4650 if (t > 80)
4651 corr = ((t * 2349) + 135940);
4652 else if (t >= 50)
4653 corr = ((t * 964) + 29317);
4654 else /* < 50 */
4655 corr = ((t * 301) + 1004);
4656
4657 corr = corr * ((150142 * state1) / 10000 - 78642);
4658 corr /= 100000;
4659 corr2 = (corr * dev_priv->ips.corr);
4660
4661 state2 = (corr2 * state1) / 10000;
4662 state2 /= 100; /* convert to mW */
4663
4664 __i915_update_gfx_val(dev_priv);
4665
4666 return dev_priv->ips.gfx_power + state2;
4667 }
4668
4669 unsigned long i915_gfx_val(struct drm_i915_private *dev_priv)
4670 {
4671 unsigned long val;
4672
4673 if (dev_priv->info->gen != 5)
4674 return 0;
4675
4676 spin_lock_irq(&mchdev_lock);
4677
4678 val = __i915_gfx_val(dev_priv);
4679
4680 spin_unlock_irq(&mchdev_lock);
4681
4682 return val;
4683 }
4684
4685 /**
4686 * i915_read_mch_val - return value for IPS use
4687 *
4688 * Calculate and return a value for the IPS driver to use when deciding whether
4689 * we have thermal and power headroom to increase CPU or GPU power budget.
4690 */
4691 unsigned long i915_read_mch_val(void)
4692 {
4693 struct drm_i915_private *dev_priv;
4694 unsigned long chipset_val, graphics_val, ret = 0;
4695
4696 spin_lock_irq(&mchdev_lock);
4697 if (!i915_mch_dev)
4698 goto out_unlock;
4699 dev_priv = i915_mch_dev;
4700
4701 chipset_val = __i915_chipset_val(dev_priv);
4702 graphics_val = __i915_gfx_val(dev_priv);
4703
4704 ret = chipset_val + graphics_val;
4705
4706 out_unlock:
4707 spin_unlock_irq(&mchdev_lock);
4708
4709 return ret;
4710 }
4711 EXPORT_SYMBOL_GPL(i915_read_mch_val);
4712
4713 /**
4714 * i915_gpu_raise - raise GPU frequency limit
4715 *
4716 * Raise the limit; IPS indicates we have thermal headroom.
4717 */
4718 bool i915_gpu_raise(void)
4719 {
4720 struct drm_i915_private *dev_priv;
4721 bool ret = true;
4722
4723 spin_lock_irq(&mchdev_lock);
4724 if (!i915_mch_dev) {
4725 ret = false;
4726 goto out_unlock;
4727 }
4728 dev_priv = i915_mch_dev;
4729
4730 if (dev_priv->ips.max_delay > dev_priv->ips.fmax)
4731 dev_priv->ips.max_delay--;
4732
4733 out_unlock:
4734 spin_unlock_irq(&mchdev_lock);
4735
4736 return ret;
4737 }
4738 EXPORT_SYMBOL_GPL(i915_gpu_raise);
4739
4740 /**
4741 * i915_gpu_lower - lower GPU frequency limit
4742 *
4743 * IPS indicates we're close to a thermal limit, so throttle back the GPU
4744 * frequency maximum.
4745 */
4746 bool i915_gpu_lower(void)
4747 {
4748 struct drm_i915_private *dev_priv;
4749 bool ret = true;
4750
4751 spin_lock_irq(&mchdev_lock);
4752 if (!i915_mch_dev) {
4753 ret = false;
4754 goto out_unlock;
4755 }
4756 dev_priv = i915_mch_dev;
4757
4758 if (dev_priv->ips.max_delay < dev_priv->ips.min_delay)
4759 dev_priv->ips.max_delay++;
4760
4761 out_unlock:
4762 spin_unlock_irq(&mchdev_lock);
4763
4764 return ret;
4765 }
4766 EXPORT_SYMBOL_GPL(i915_gpu_lower);
4767
4768 /**
4769 * i915_gpu_busy - indicate GPU business to IPS
4770 *
4771 * Tell the IPS driver whether or not the GPU is busy.
4772 */
4773 bool i915_gpu_busy(void)
4774 {
4775 struct drm_i915_private *dev_priv;
4776 struct intel_ring_buffer *ring;
4777 bool ret = false;
4778 int i;
4779
4780 spin_lock_irq(&mchdev_lock);
4781 if (!i915_mch_dev)
4782 goto out_unlock;
4783 dev_priv = i915_mch_dev;
4784
4785 for_each_ring(ring, dev_priv, i)
4786 ret |= !list_empty(&ring->request_list);
4787
4788 out_unlock:
4789 spin_unlock_irq(&mchdev_lock);
4790
4791 return ret;
4792 }
4793 EXPORT_SYMBOL_GPL(i915_gpu_busy);
4794
4795 /**
4796 * i915_gpu_turbo_disable - disable graphics turbo
4797 *
4798 * Disable graphics turbo by resetting the max frequency and setting the
4799 * current frequency to the default.
4800 */
4801 bool i915_gpu_turbo_disable(void)
4802 {
4803 struct drm_i915_private *dev_priv;
4804 bool ret = true;
4805
4806 spin_lock_irq(&mchdev_lock);
4807 if (!i915_mch_dev) {
4808 ret = false;
4809 goto out_unlock;
4810 }
4811 dev_priv = i915_mch_dev;
4812
4813 dev_priv->ips.max_delay = dev_priv->ips.fstart;
4814
4815 if (!ironlake_set_drps(dev_priv->dev, dev_priv->ips.fstart))
4816 ret = false;
4817
4818 out_unlock:
4819 spin_unlock_irq(&mchdev_lock);
4820
4821 return ret;
4822 }
4823 EXPORT_SYMBOL_GPL(i915_gpu_turbo_disable);
4824
4825 /**
4826 * Tells the intel_ips driver that the i915 driver is now loaded, if
4827 * IPS got loaded first.
4828 *
4829 * This awkward dance is so that neither module has to depend on the
4830 * other in order for IPS to do the appropriate communication of
4831 * GPU turbo limits to i915.
4832 */
4833 static void
4834 ips_ping_for_i915_load(void)
4835 {
4836 void (*link)(void);
4837
4838 link = symbol_get(ips_link_to_i915_driver);
4839 if (link) {
4840 link();
4841 symbol_put(ips_link_to_i915_driver);
4842 }
4843 }
4844
4845 void intel_gpu_ips_init(struct drm_i915_private *dev_priv)
4846 {
4847 /* We only register the i915 ips part with intel-ips once everything is
4848 * set up, to avoid intel-ips sneaking in and reading bogus values. */
4849 spin_lock_irq(&mchdev_lock);
4850 i915_mch_dev = dev_priv;
4851 spin_unlock_irq(&mchdev_lock);
4852
4853 ips_ping_for_i915_load();
4854 }
4855
4856 void intel_gpu_ips_teardown(void)
4857 {
4858 spin_lock_irq(&mchdev_lock);
4859 i915_mch_dev = NULL;
4860 spin_unlock_irq(&mchdev_lock);
4861 }
4862 static void intel_init_emon(struct drm_device *dev)
4863 {
4864 struct drm_i915_private *dev_priv = dev->dev_private;
4865 u32 lcfuse;
4866 u8 pxw[16];
4867 int i;
4868
4869 /* Disable to program */
4870 I915_WRITE(ECR, 0);
4871 POSTING_READ(ECR);
4872
4873 /* Program energy weights for various events */
4874 I915_WRITE(SDEW, 0x15040d00);
4875 I915_WRITE(CSIEW0, 0x007f0000);
4876 I915_WRITE(CSIEW1, 0x1e220004);
4877 I915_WRITE(CSIEW2, 0x04000004);
4878
4879 for (i = 0; i < 5; i++)
4880 I915_WRITE(PEW + (i * 4), 0);
4881 for (i = 0; i < 3; i++)
4882 I915_WRITE(DEW + (i * 4), 0);
4883
4884 /* Program P-state weights to account for frequency power adjustment */
4885 for (i = 0; i < 16; i++) {
4886 u32 pxvidfreq = I915_READ(PXVFREQ_BASE + (i * 4));
4887 unsigned long freq = intel_pxfreq(pxvidfreq);
4888 unsigned long vid = (pxvidfreq & PXVFREQ_PX_MASK) >>
4889 PXVFREQ_PX_SHIFT;
4890 unsigned long val;
4891
4892 val = vid * vid;
4893 val *= (freq / 1000);
4894 val *= 255;
4895 val /= (127*127*900);
4896 if (val > 0xff)
4897 DRM_ERROR("bad pxval: %ld\n", val);
4898 pxw[i] = val;
4899 }
4900 /* Render standby states get 0 weight */
4901 pxw[14] = 0;
4902 pxw[15] = 0;
4903
4904 for (i = 0; i < 4; i++) {
4905 u32 val = (pxw[i*4] << 24) | (pxw[(i*4)+1] << 16) |
4906 (pxw[(i*4)+2] << 8) | (pxw[(i*4)+3]);
4907 I915_WRITE(PXW + (i * 4), val);
4908 }
4909
4910 /* Adjust magic regs to magic values (more experimental results) */
4911 I915_WRITE(OGW0, 0);
4912 I915_WRITE(OGW1, 0);
4913 I915_WRITE(EG0, 0x00007f00);
4914 I915_WRITE(EG1, 0x0000000e);
4915 I915_WRITE(EG2, 0x000e0000);
4916 I915_WRITE(EG3, 0x68000300);
4917 I915_WRITE(EG4, 0x42000000);
4918 I915_WRITE(EG5, 0x00140031);
4919 I915_WRITE(EG6, 0);
4920 I915_WRITE(EG7, 0);
4921
4922 for (i = 0; i < 8; i++)
4923 I915_WRITE(PXWL + (i * 4), 0);
4924
4925 /* Enable PMON + select events */
4926 I915_WRITE(ECR, 0x80000019);
4927
4928 lcfuse = I915_READ(LCFUSE02);
4929
4930 dev_priv->ips.corr = (lcfuse & LCFUSE_HIV_MASK);
4931 }
4932
4933 void intel_disable_gt_powersave(struct drm_device *dev)
4934 {
4935 struct drm_i915_private *dev_priv = dev->dev_private;
4936
4937 /* Interrupts should be disabled already to avoid re-arming. */
4938 WARN_ON(dev->irq_enabled);
4939
4940 if (IS_IRONLAKE_M(dev)) {
4941 ironlake_disable_drps(dev);
4942 ironlake_disable_rc6(dev);
4943 } else if (INTEL_INFO(dev)->gen >= 6) {
4944 cancel_delayed_work_sync(&dev_priv->rps.delayed_resume_work);
4945 cancel_work_sync(&dev_priv->rps.work);
4946 mutex_lock(&dev_priv->rps.hw_lock);
4947 if (IS_VALLEYVIEW(dev))
4948 valleyview_disable_rps(dev);
4949 else
4950 gen6_disable_rps(dev);
4951 dev_priv->rps.enabled = false;
4952 mutex_unlock(&dev_priv->rps.hw_lock);
4953 }
4954 }
4955
4956 static void intel_gen6_powersave_work(struct work_struct *work)
4957 {
4958 struct drm_i915_private *dev_priv =
4959 container_of(work, struct drm_i915_private,
4960 rps.delayed_resume_work.work);
4961 struct drm_device *dev = dev_priv->dev;
4962
4963 mutex_lock(&dev_priv->rps.hw_lock);
4964
4965 if (IS_VALLEYVIEW(dev)) {
4966 valleyview_enable_rps(dev);
4967 } else if (IS_BROADWELL(dev)) {
4968 gen8_enable_rps(dev);
4969 gen6_update_ring_freq(dev);
4970 } else {
4971 gen6_enable_rps(dev);
4972 gen6_update_ring_freq(dev);
4973 }
4974 dev_priv->rps.enabled = true;
4975 mutex_unlock(&dev_priv->rps.hw_lock);
4976 }
4977
4978 void intel_enable_gt_powersave(struct drm_device *dev)
4979 {
4980 struct drm_i915_private *dev_priv = dev->dev_private;
4981
4982 if (IS_IRONLAKE_M(dev)) {
4983 ironlake_enable_drps(dev);
4984 ironlake_enable_rc6(dev);
4985 intel_init_emon(dev);
4986 } else if (IS_GEN6(dev) || IS_GEN7(dev)) {
4987 /*
4988 * PCU communication is slow and this doesn't need to be
4989 * done at any specific time, so do this out of our fast path
4990 * to make resume and init faster.
4991 */
4992 schedule_delayed_work(&dev_priv->rps.delayed_resume_work,
4993 round_jiffies_up_relative(HZ));
4994 }
4995 }
4996
4997 static void ibx_init_clock_gating(struct drm_device *dev)
4998 {
4999 struct drm_i915_private *dev_priv = dev->dev_private;
5000
5001 /*
5002 * On Ibex Peak and Cougar Point, we need to disable clock
5003 * gating for the panel power sequencer or it will fail to
5004 * start up when no ports are active.
5005 */
5006 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE);
5007 }
5008
5009 static void g4x_disable_trickle_feed(struct drm_device *dev)
5010 {
5011 struct drm_i915_private *dev_priv = dev->dev_private;
5012 int pipe;
5013
5014 for_each_pipe(pipe) {
5015 I915_WRITE(DSPCNTR(pipe),
5016 I915_READ(DSPCNTR(pipe)) |
5017 DISPPLANE_TRICKLE_FEED_DISABLE);
5018 intel_flush_primary_plane(dev_priv, pipe);
5019 }
5020 }
5021
5022 static void ironlake_init_clock_gating(struct drm_device *dev)
5023 {
5024 struct drm_i915_private *dev_priv = dev->dev_private;
5025 uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
5026
5027 /*
5028 * Required for FBC
5029 * WaFbcDisableDpfcClockGating:ilk
5030 */
5031 dspclk_gate |= ILK_DPFCRUNIT_CLOCK_GATE_DISABLE |
5032 ILK_DPFCUNIT_CLOCK_GATE_DISABLE |
5033 ILK_DPFDUNIT_CLOCK_GATE_ENABLE;
5034
5035 I915_WRITE(PCH_3DCGDIS0,
5036 MARIUNIT_CLOCK_GATE_DISABLE |
5037 SVSMUNIT_CLOCK_GATE_DISABLE);
5038 I915_WRITE(PCH_3DCGDIS1,
5039 VFMUNIT_CLOCK_GATE_DISABLE);
5040
5041 /*
5042 * According to the spec the following bits should be set in
5043 * order to enable memory self-refresh
5044 * The bit 22/21 of 0x42004
5045 * The bit 5 of 0x42020
5046 * The bit 15 of 0x45000
5047 */
5048 I915_WRITE(ILK_DISPLAY_CHICKEN2,
5049 (I915_READ(ILK_DISPLAY_CHICKEN2) |
5050 ILK_DPARB_GATE | ILK_VSDPFD_FULL));
5051 dspclk_gate |= ILK_DPARBUNIT_CLOCK_GATE_ENABLE;
5052 I915_WRITE(DISP_ARB_CTL,
5053 (I915_READ(DISP_ARB_CTL) |
5054 DISP_FBC_WM_DIS));
5055 I915_WRITE(WM3_LP_ILK, 0);
5056 I915_WRITE(WM2_LP_ILK, 0);
5057 I915_WRITE(WM1_LP_ILK, 0);
5058
5059 /*
5060 * Based on the document from hardware guys the following bits
5061 * should be set unconditionally in order to enable FBC.
5062 * The bit 22 of 0x42000
5063 * The bit 22 of 0x42004
5064 * The bit 7,8,9 of 0x42020.
5065 */
5066 if (IS_IRONLAKE_M(dev)) {
5067 /* WaFbcAsynchFlipDisableFbcQueue:ilk */
5068 I915_WRITE(ILK_DISPLAY_CHICKEN1,
5069 I915_READ(ILK_DISPLAY_CHICKEN1) |
5070 ILK_FBCQ_DIS);
5071 I915_WRITE(ILK_DISPLAY_CHICKEN2,
5072 I915_READ(ILK_DISPLAY_CHICKEN2) |
5073 ILK_DPARB_GATE);
5074 }
5075
5076 I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
5077
5078 I915_WRITE(ILK_DISPLAY_CHICKEN2,
5079 I915_READ(ILK_DISPLAY_CHICKEN2) |
5080 ILK_ELPIN_409_SELECT);
5081 I915_WRITE(_3D_CHICKEN2,
5082 _3D_CHICKEN2_WM_READ_PIPELINED << 16 |
5083 _3D_CHICKEN2_WM_READ_PIPELINED);
5084
5085 /* WaDisableRenderCachePipelinedFlush:ilk */
5086 I915_WRITE(CACHE_MODE_0,
5087 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
5088
5089 g4x_disable_trickle_feed(dev);
5090
5091 ibx_init_clock_gating(dev);
5092 }
5093
5094 static void cpt_init_clock_gating(struct drm_device *dev)
5095 {
5096 struct drm_i915_private *dev_priv = dev->dev_private;
5097 int pipe;
5098 uint32_t val;
5099
5100 /*
5101 * On Ibex Peak and Cougar Point, we need to disable clock
5102 * gating for the panel power sequencer or it will fail to
5103 * start up when no ports are active.
5104 */
5105 I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE |
5106 PCH_DPLUNIT_CLOCK_GATE_DISABLE |
5107 PCH_CPUNIT_CLOCK_GATE_DISABLE);
5108 I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) |
5109 DPLS_EDP_PPS_FIX_DIS);
5110 /* The below fixes the weird display corruption, a few pixels shifted
5111 * downward, on (only) LVDS of some HP laptops with IVY.
5112 */
5113 for_each_pipe(pipe) {
5114 val = I915_READ(TRANS_CHICKEN2(pipe));
5115 val |= TRANS_CHICKEN2_TIMING_OVERRIDE;
5116 val &= ~TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
5117 if (dev_priv->vbt.fdi_rx_polarity_inverted)
5118 val |= TRANS_CHICKEN2_FDI_POLARITY_REVERSED;
5119 val &= ~TRANS_CHICKEN2_FRAME_START_DELAY_MASK;
5120 val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_COUNTER;
5121 val &= ~TRANS_CHICKEN2_DISABLE_DEEP_COLOR_MODESWITCH;
5122 I915_WRITE(TRANS_CHICKEN2(pipe), val);
5123 }
5124 /* WADP0ClockGatingDisable */
5125 for_each_pipe(pipe) {
5126 I915_WRITE(TRANS_CHICKEN1(pipe),
5127 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
5128 }
5129 }
5130
5131 static void gen6_check_mch_setup(struct drm_device *dev)
5132 {
5133 struct drm_i915_private *dev_priv = dev->dev_private;
5134 uint32_t tmp;
5135
5136 tmp = I915_READ(MCH_SSKPD);
5137 if ((tmp & MCH_SSKPD_WM0_MASK) != MCH_SSKPD_WM0_VAL) {
5138 DRM_INFO("Wrong MCH_SSKPD value: 0x%08x\n", tmp);
5139 DRM_INFO("This can cause pipe underruns and display issues.\n");
5140 DRM_INFO("Please upgrade your BIOS to fix this.\n");
5141 }
5142 }
5143
5144 static void gen6_init_clock_gating(struct drm_device *dev)
5145 {
5146 struct drm_i915_private *dev_priv = dev->dev_private;
5147 uint32_t dspclk_gate = ILK_VRHUNIT_CLOCK_GATE_DISABLE;
5148
5149 I915_WRITE(ILK_DSPCLK_GATE_D, dspclk_gate);
5150
5151 I915_WRITE(ILK_DISPLAY_CHICKEN2,
5152 I915_READ(ILK_DISPLAY_CHICKEN2) |
5153 ILK_ELPIN_409_SELECT);
5154
5155 /* WaDisableHiZPlanesWhenMSAAEnabled:snb */
5156 I915_WRITE(_3D_CHICKEN,
5157 _MASKED_BIT_ENABLE(_3D_CHICKEN_HIZ_PLANE_DISABLE_MSAA_4X_SNB));
5158
5159 /* WaSetupGtModeTdRowDispatch:snb */
5160 if (IS_SNB_GT1(dev))
5161 I915_WRITE(GEN6_GT_MODE,
5162 _MASKED_BIT_ENABLE(GEN6_TD_FOUR_ROW_DISPATCH_DISABLE));
5163
5164 I915_WRITE(WM3_LP_ILK, 0);
5165 I915_WRITE(WM2_LP_ILK, 0);
5166 I915_WRITE(WM1_LP_ILK, 0);
5167
5168 I915_WRITE(CACHE_MODE_0,
5169 _MASKED_BIT_DISABLE(CM0_STC_EVICT_DISABLE_LRA_SNB));
5170
5171 I915_WRITE(GEN6_UCGCTL1,
5172 I915_READ(GEN6_UCGCTL1) |
5173 GEN6_BLBUNIT_CLOCK_GATE_DISABLE |
5174 GEN6_CSUNIT_CLOCK_GATE_DISABLE);
5175
5176 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
5177 * gating disable must be set. Failure to set it results in
5178 * flickering pixels due to Z write ordering failures after
5179 * some amount of runtime in the Mesa "fire" demo, and Unigine
5180 * Sanctuary and Tropics, and apparently anything else with
5181 * alpha test or pixel discard.
5182 *
5183 * According to the spec, bit 11 (RCCUNIT) must also be set,
5184 * but we didn't debug actual testcases to find it out.
5185 *
5186 * Also apply WaDisableVDSUnitClockGating:snb and
5187 * WaDisableRCPBUnitClockGating:snb.
5188 */
5189 I915_WRITE(GEN6_UCGCTL2,
5190 GEN7_VDSUNIT_CLOCK_GATE_DISABLE |
5191 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE |
5192 GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
5193
5194 /* Bspec says we need to always set all mask bits. */
5195 I915_WRITE(_3D_CHICKEN3, (0xFFFF << 16) |
5196 _3D_CHICKEN3_SF_DISABLE_FASTCLIP_CULL);
5197
5198 /*
5199 * According to the spec the following bits should be
5200 * set in order to enable memory self-refresh and fbc:
5201 * The bit21 and bit22 of 0x42000
5202 * The bit21 and bit22 of 0x42004
5203 * The bit5 and bit7 of 0x42020
5204 * The bit14 of 0x70180
5205 * The bit14 of 0x71180
5206 *
5207 * WaFbcAsynchFlipDisableFbcQueue:snb
5208 */
5209 I915_WRITE(ILK_DISPLAY_CHICKEN1,
5210 I915_READ(ILK_DISPLAY_CHICKEN1) |
5211 ILK_FBCQ_DIS | ILK_PABSTRETCH_DIS);
5212 I915_WRITE(ILK_DISPLAY_CHICKEN2,
5213 I915_READ(ILK_DISPLAY_CHICKEN2) |
5214 ILK_DPARB_GATE | ILK_VSDPFD_FULL);
5215 I915_WRITE(ILK_DSPCLK_GATE_D,
5216 I915_READ(ILK_DSPCLK_GATE_D) |
5217 ILK_DPARBUNIT_CLOCK_GATE_ENABLE |
5218 ILK_DPFDUNIT_CLOCK_GATE_ENABLE);
5219
5220 g4x_disable_trickle_feed(dev);
5221
5222 /* The default value should be 0x200 according to docs, but the two
5223 * platforms I checked have a 0 for this. (Maybe BIOS overrides?) */
5224 I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_DISABLE(0xffff));
5225 I915_WRITE(GEN6_GT_MODE, _MASKED_BIT_ENABLE(GEN6_GT_MODE_HI));
5226
5227 cpt_init_clock_gating(dev);
5228
5229 gen6_check_mch_setup(dev);
5230 }
5231
5232 static void gen7_setup_fixed_func_scheduler(struct drm_i915_private *dev_priv)
5233 {
5234 uint32_t reg = I915_READ(GEN7_FF_THREAD_MODE);
5235
5236 reg &= ~GEN7_FF_SCHED_MASK;
5237 reg |= GEN7_FF_TS_SCHED_HW;
5238 reg |= GEN7_FF_VS_SCHED_HW;
5239 reg |= GEN7_FF_DS_SCHED_HW;
5240
5241 if (IS_HASWELL(dev_priv->dev))
5242 reg &= ~GEN7_FF_VS_REF_CNT_FFME;
5243
5244 I915_WRITE(GEN7_FF_THREAD_MODE, reg);
5245 }
5246
5247 static void lpt_init_clock_gating(struct drm_device *dev)
5248 {
5249 struct drm_i915_private *dev_priv = dev->dev_private;
5250
5251 /*
5252 * TODO: this bit should only be enabled when really needed, then
5253 * disabled when not needed anymore in order to save power.
5254 */
5255 if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE)
5256 I915_WRITE(SOUTH_DSPCLK_GATE_D,
5257 I915_READ(SOUTH_DSPCLK_GATE_D) |
5258 PCH_LP_PARTITION_LEVEL_DISABLE);
5259
5260 /* WADPOClockGatingDisable:hsw */
5261 I915_WRITE(_TRANSA_CHICKEN1,
5262 I915_READ(_TRANSA_CHICKEN1) |
5263 TRANS_CHICKEN1_DP0UNIT_GC_DISABLE);
5264 }
5265
5266 static void lpt_suspend_hw(struct drm_device *dev)
5267 {
5268 struct drm_i915_private *dev_priv = dev->dev_private;
5269
5270 if (dev_priv->pch_id == INTEL_PCH_LPT_LP_DEVICE_ID_TYPE) {
5271 uint32_t val = I915_READ(SOUTH_DSPCLK_GATE_D);
5272
5273 val &= ~PCH_LP_PARTITION_LEVEL_DISABLE;
5274 I915_WRITE(SOUTH_DSPCLK_GATE_D, val);
5275 }
5276 }
5277
5278 static void gen8_init_clock_gating(struct drm_device *dev)
5279 {
5280 struct drm_i915_private *dev_priv = dev->dev_private;
5281 enum pipe i;
5282
5283 I915_WRITE(WM3_LP_ILK, 0);
5284 I915_WRITE(WM2_LP_ILK, 0);
5285 I915_WRITE(WM1_LP_ILK, 0);
5286
5287 /* FIXME(BDW): Check all the w/a, some might only apply to
5288 * pre-production hw. */
5289
5290 WARN(!i915_preliminary_hw_support,
5291 "GEN8_CENTROID_PIXEL_OPT_DIS not be needed for production\n");
5292 I915_WRITE(HALF_SLICE_CHICKEN3,
5293 _MASKED_BIT_ENABLE(GEN8_CENTROID_PIXEL_OPT_DIS));
5294 I915_WRITE(HALF_SLICE_CHICKEN3,
5295 _MASKED_BIT_ENABLE(GEN8_SAMPLER_POWER_BYPASS_DIS));
5296 I915_WRITE(GAMTARBMODE, _MASKED_BIT_ENABLE(ARB_MODE_BWGTLB_DISABLE));
5297
5298 I915_WRITE(_3D_CHICKEN3,
5299 _3D_CHICKEN_SDE_LIMIT_FIFO_POLY_DEPTH(2));
5300
5301 I915_WRITE(COMMON_SLICE_CHICKEN2,
5302 _MASKED_BIT_ENABLE(GEN8_CSC2_SBE_VUE_CACHE_CONSERVATIVE));
5303
5304 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
5305 _MASKED_BIT_ENABLE(GEN7_SINGLE_SUBSCAN_DISPATCH_ENABLE));
5306
5307 /* WaSwitchSolVfFArbitrationPriority */
5308 I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL);
5309
5310 /* WaPsrDPAMaskVBlankInSRD */
5311 I915_WRITE(CHICKEN_PAR1_1,
5312 I915_READ(CHICKEN_PAR1_1) | DPA_MASK_VBLANK_SRD);
5313
5314 /* WaPsrDPRSUnmaskVBlankInSRD */
5315 for_each_pipe(i) {
5316 I915_WRITE(CHICKEN_PIPESL_1(i),
5317 I915_READ(CHICKEN_PIPESL_1(i) |
5318 DPRS_MASK_VBLANK_SRD));
5319 }
5320 }
5321
5322 static void haswell_init_clock_gating(struct drm_device *dev)
5323 {
5324 struct drm_i915_private *dev_priv = dev->dev_private;
5325
5326 I915_WRITE(WM3_LP_ILK, 0);
5327 I915_WRITE(WM2_LP_ILK, 0);
5328 I915_WRITE(WM1_LP_ILK, 0);
5329
5330 /* According to the spec, bit 13 (RCZUNIT) must be set on IVB.
5331 * This implements the WaDisableRCZUnitClockGating:hsw workaround.
5332 */
5333 I915_WRITE(GEN6_UCGCTL2, GEN6_RCZUNIT_CLOCK_GATE_DISABLE);
5334
5335 /* Apply the WaDisableRHWOOptimizationForRenderHang:hsw workaround. */
5336 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
5337 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
5338
5339 /* WaApplyL3ControlAndL3ChickenMode:hsw */
5340 I915_WRITE(GEN7_L3CNTLREG1,
5341 GEN7_WA_FOR_GEN7_L3_CONTROL);
5342 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
5343 GEN7_WA_L3_CHICKEN_MODE);
5344
5345 /* L3 caching of data atomics doesn't work -- disable it. */
5346 I915_WRITE(HSW_SCRATCH1, HSW_SCRATCH1_L3_DATA_ATOMICS_DISABLE);
5347 I915_WRITE(HSW_ROW_CHICKEN3,
5348 _MASKED_BIT_ENABLE(HSW_ROW_CHICKEN3_L3_GLOBAL_ATOMICS_DISABLE));
5349
5350 /* This is required by WaCatErrorRejectionIssue:hsw */
5351 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
5352 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
5353 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
5354
5355 /* WaVSRefCountFullforceMissDisable:hsw */
5356 gen7_setup_fixed_func_scheduler(dev_priv);
5357
5358 /* WaDisable4x2SubspanOptimization:hsw */
5359 I915_WRITE(CACHE_MODE_1,
5360 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
5361
5362 /* WaSwitchSolVfFArbitrationPriority:hsw */
5363 I915_WRITE(GAM_ECOCHK, I915_READ(GAM_ECOCHK) | HSW_ECOCHK_ARB_PRIO_SOL);
5364
5365 /* WaRsPkgCStateDisplayPMReq:hsw */
5366 I915_WRITE(CHICKEN_PAR1_1,
5367 I915_READ(CHICKEN_PAR1_1) | FORCE_ARB_IDLE_PLANES);
5368
5369 lpt_init_clock_gating(dev);
5370 }
5371
5372 static void ivybridge_init_clock_gating(struct drm_device *dev)
5373 {
5374 struct drm_i915_private *dev_priv = dev->dev_private;
5375 uint32_t snpcr;
5376
5377 I915_WRITE(WM3_LP_ILK, 0);
5378 I915_WRITE(WM2_LP_ILK, 0);
5379 I915_WRITE(WM1_LP_ILK, 0);
5380
5381 I915_WRITE(ILK_DSPCLK_GATE_D, ILK_VRHUNIT_CLOCK_GATE_DISABLE);
5382
5383 /* WaDisableEarlyCull:ivb */
5384 I915_WRITE(_3D_CHICKEN3,
5385 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL));
5386
5387 /* WaDisableBackToBackFlipFix:ivb */
5388 I915_WRITE(IVB_CHICKEN3,
5389 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
5390 CHICKEN3_DGMG_DONE_FIX_DISABLE);
5391
5392 /* WaDisablePSDDualDispatchEnable:ivb */
5393 if (IS_IVB_GT1(dev))
5394 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
5395 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
5396 else
5397 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1_GT2,
5398 _MASKED_BIT_ENABLE(GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
5399
5400 /* Apply the WaDisableRHWOOptimizationForRenderHang:ivb workaround. */
5401 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
5402 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
5403
5404 /* WaApplyL3ControlAndL3ChickenMode:ivb */
5405 I915_WRITE(GEN7_L3CNTLREG1,
5406 GEN7_WA_FOR_GEN7_L3_CONTROL);
5407 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER,
5408 GEN7_WA_L3_CHICKEN_MODE);
5409 if (IS_IVB_GT1(dev))
5410 I915_WRITE(GEN7_ROW_CHICKEN2,
5411 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
5412 else
5413 I915_WRITE(GEN7_ROW_CHICKEN2_GT2,
5414 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
5415
5416
5417 /* WaForceL3Serialization:ivb */
5418 I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
5419 ~L3SQ_URB_READ_CAM_MATCH_DISABLE);
5420
5421 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
5422 * gating disable must be set. Failure to set it results in
5423 * flickering pixels due to Z write ordering failures after
5424 * some amount of runtime in the Mesa "fire" demo, and Unigine
5425 * Sanctuary and Tropics, and apparently anything else with
5426 * alpha test or pixel discard.
5427 *
5428 * According to the spec, bit 11 (RCCUNIT) must also be set,
5429 * but we didn't debug actual testcases to find it out.
5430 *
5431 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
5432 * This implements the WaDisableRCZUnitClockGating:ivb workaround.
5433 */
5434 I915_WRITE(GEN6_UCGCTL2,
5435 GEN6_RCZUNIT_CLOCK_GATE_DISABLE |
5436 GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
5437
5438 /* This is required by WaCatErrorRejectionIssue:ivb */
5439 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
5440 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
5441 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
5442
5443 g4x_disable_trickle_feed(dev);
5444
5445 /* WaVSRefCountFullforceMissDisable:ivb */
5446 gen7_setup_fixed_func_scheduler(dev_priv);
5447
5448 /* WaDisable4x2SubspanOptimization:ivb */
5449 I915_WRITE(CACHE_MODE_1,
5450 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
5451
5452 snpcr = I915_READ(GEN6_MBCUNIT_SNPCR);
5453 snpcr &= ~GEN6_MBC_SNPCR_MASK;
5454 snpcr |= GEN6_MBC_SNPCR_MED;
5455 I915_WRITE(GEN6_MBCUNIT_SNPCR, snpcr);
5456
5457 if (!HAS_PCH_NOP(dev))
5458 cpt_init_clock_gating(dev);
5459
5460 gen6_check_mch_setup(dev);
5461 }
5462
5463 static void valleyview_init_clock_gating(struct drm_device *dev)
5464 {
5465 struct drm_i915_private *dev_priv = dev->dev_private;
5466
5467 I915_WRITE(DSPCLK_GATE_D, VRHUNIT_CLOCK_GATE_DISABLE);
5468
5469 /* WaDisableEarlyCull:vlv */
5470 I915_WRITE(_3D_CHICKEN3,
5471 _MASKED_BIT_ENABLE(_3D_CHICKEN_SF_DISABLE_OBJEND_CULL));
5472
5473 /* WaDisableBackToBackFlipFix:vlv */
5474 I915_WRITE(IVB_CHICKEN3,
5475 CHICKEN3_DGMG_REQ_OUT_FIX_DISABLE |
5476 CHICKEN3_DGMG_DONE_FIX_DISABLE);
5477
5478 /* WaDisablePSDDualDispatchEnable:vlv */
5479 I915_WRITE(GEN7_HALF_SLICE_CHICKEN1,
5480 _MASKED_BIT_ENABLE(GEN7_MAX_PS_THREAD_DEP |
5481 GEN7_PSD_SINGLE_PORT_DISPATCH_ENABLE));
5482
5483 /* Apply the WaDisableRHWOOptimizationForRenderHang:vlv workaround. */
5484 I915_WRITE(GEN7_COMMON_SLICE_CHICKEN1,
5485 GEN7_CSC1_RHWO_OPT_DISABLE_IN_RCC);
5486
5487 /* WaApplyL3ControlAndL3ChickenMode:vlv */
5488 I915_WRITE(GEN7_L3CNTLREG1, I915_READ(GEN7_L3CNTLREG1) | GEN7_L3AGDIS);
5489 I915_WRITE(GEN7_L3_CHICKEN_MODE_REGISTER, GEN7_WA_L3_CHICKEN_MODE);
5490
5491 /* WaForceL3Serialization:vlv */
5492 I915_WRITE(GEN7_L3SQCREG4, I915_READ(GEN7_L3SQCREG4) &
5493 ~L3SQ_URB_READ_CAM_MATCH_DISABLE);
5494
5495 /* WaDisableDopClockGating:vlv */
5496 I915_WRITE(GEN7_ROW_CHICKEN2,
5497 _MASKED_BIT_ENABLE(DOP_CLOCK_GATING_DISABLE));
5498
5499 /* This is required by WaCatErrorRejectionIssue:vlv */
5500 I915_WRITE(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG,
5501 I915_READ(GEN7_SQ_CHICKEN_MBCUNIT_CONFIG) |
5502 GEN7_SQ_CHICKEN_MBCUNIT_SQINTMOB);
5503
5504 /* According to the BSpec vol1g, bit 12 (RCPBUNIT) clock
5505 * gating disable must be set. Failure to set it results in
5506 * flickering pixels due to Z write ordering failures after
5507 * some amount of runtime in the Mesa "fire" demo, and Unigine
5508 * Sanctuary and Tropics, and apparently anything else with
5509 * alpha test or pixel discard.
5510 *
5511 * According to the spec, bit 11 (RCCUNIT) must also be set,
5512 * but we didn't debug actual testcases to find it out.
5513 *
5514 * According to the spec, bit 13 (RCZUNIT) must be set on IVB.
5515 * This implements the WaDisableRCZUnitClockGating:vlv workaround.
5516 *
5517 * Also apply WaDisableVDSUnitClockGating:vlv and
5518 * WaDisableRCPBUnitClockGating:vlv.
5519 */
5520 I915_WRITE(GEN6_UCGCTL2,
5521 GEN7_VDSUNIT_CLOCK_GATE_DISABLE |
5522 GEN7_TDLUNIT_CLOCK_GATE_DISABLE |
5523 GEN6_RCZUNIT_CLOCK_GATE_DISABLE |
5524 GEN6_RCPBUNIT_CLOCK_GATE_DISABLE |
5525 GEN6_RCCUNIT_CLOCK_GATE_DISABLE);
5526
5527 I915_WRITE(GEN7_UCGCTL4, GEN7_L3BANK2X_CLOCK_GATE_DISABLE);
5528
5529 I915_WRITE(MI_ARB_VLV, MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE);
5530
5531 I915_WRITE(CACHE_MODE_1,
5532 _MASKED_BIT_ENABLE(PIXEL_SUBSPAN_COLLECT_OPT_DISABLE));
5533
5534 /*
5535 * WaDisableVLVClockGating_VBIIssue:vlv
5536 * Disable clock gating on th GCFG unit to prevent a delay
5537 * in the reporting of vblank events.
5538 */
5539 I915_WRITE(VLV_GUNIT_CLOCK_GATE, 0xffffffff);
5540
5541 /* Conservative clock gating settings for now */
5542 I915_WRITE(0x9400, 0xffffffff);
5543 I915_WRITE(0x9404, 0xffffffff);
5544 I915_WRITE(0x9408, 0xffffffff);
5545 I915_WRITE(0x940c, 0xffffffff);
5546 I915_WRITE(0x9410, 0xffffffff);
5547 I915_WRITE(0x9414, 0xffffffff);
5548 I915_WRITE(0x9418, 0xffffffff);
5549 }
5550
5551 static void g4x_init_clock_gating(struct drm_device *dev)
5552 {
5553 struct drm_i915_private *dev_priv = dev->dev_private;
5554 uint32_t dspclk_gate;
5555
5556 I915_WRITE(RENCLK_GATE_D1, 0);
5557 I915_WRITE(RENCLK_GATE_D2, VF_UNIT_CLOCK_GATE_DISABLE |
5558 GS_UNIT_CLOCK_GATE_DISABLE |
5559 CL_UNIT_CLOCK_GATE_DISABLE);
5560 I915_WRITE(RAMCLK_GATE_D, 0);
5561 dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE |
5562 OVRUNIT_CLOCK_GATE_DISABLE |
5563 OVCUNIT_CLOCK_GATE_DISABLE;
5564 if (IS_GM45(dev))
5565 dspclk_gate |= DSSUNIT_CLOCK_GATE_DISABLE;
5566 I915_WRITE(DSPCLK_GATE_D, dspclk_gate);
5567
5568 /* WaDisableRenderCachePipelinedFlush */
5569 I915_WRITE(CACHE_MODE_0,
5570 _MASKED_BIT_ENABLE(CM0_PIPELINED_RENDER_FLUSH_DISABLE));
5571
5572 g4x_disable_trickle_feed(dev);
5573 }
5574
5575 static void crestline_init_clock_gating(struct drm_device *dev)
5576 {
5577 struct drm_i915_private *dev_priv = dev->dev_private;
5578
5579 I915_WRITE(RENCLK_GATE_D1, I965_RCC_CLOCK_GATE_DISABLE);
5580 I915_WRITE(RENCLK_GATE_D2, 0);
5581 I915_WRITE(DSPCLK_GATE_D, 0);
5582 I915_WRITE(RAMCLK_GATE_D, 0);
5583 I915_WRITE16(DEUC, 0);
5584 I915_WRITE(MI_ARB_STATE,
5585 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
5586 }
5587
5588 static void broadwater_init_clock_gating(struct drm_device *dev)
5589 {
5590 struct drm_i915_private *dev_priv = dev->dev_private;
5591
5592 I915_WRITE(RENCLK_GATE_D1, I965_RCZ_CLOCK_GATE_DISABLE |
5593 I965_RCC_CLOCK_GATE_DISABLE |
5594 I965_RCPB_CLOCK_GATE_DISABLE |
5595 I965_ISC_CLOCK_GATE_DISABLE |
5596 I965_FBC_CLOCK_GATE_DISABLE);
5597 I915_WRITE(RENCLK_GATE_D2, 0);
5598 I915_WRITE(MI_ARB_STATE,
5599 _MASKED_BIT_ENABLE(MI_ARB_DISPLAY_TRICKLE_FEED_DISABLE));
5600 }
5601
5602 static void gen3_init_clock_gating(struct drm_device *dev)
5603 {
5604 struct drm_i915_private *dev_priv = dev->dev_private;
5605 u32 dstate = I915_READ(D_STATE);
5606
5607 dstate |= DSTATE_PLL_D3_OFF | DSTATE_GFX_CLOCK_GATING |
5608 DSTATE_DOT_CLOCK_GATING;
5609 I915_WRITE(D_STATE, dstate);
5610
5611 if (IS_PINEVIEW(dev))
5612 I915_WRITE(ECOSKPD, _MASKED_BIT_ENABLE(ECO_GATING_CX_ONLY));
5613
5614 /* IIR "flip pending" means done if this bit is set */
5615 I915_WRITE(ECOSKPD, _MASKED_BIT_DISABLE(ECO_FLIP_DONE));
5616 }
5617
5618 static void i85x_init_clock_gating(struct drm_device *dev)
5619 {
5620 struct drm_i915_private *dev_priv = dev->dev_private;
5621
5622 I915_WRITE(RENCLK_GATE_D1, SV_CLOCK_GATE_DISABLE);
5623 }
5624
5625 static void i830_init_clock_gating(struct drm_device *dev)
5626 {
5627 struct drm_i915_private *dev_priv = dev->dev_private;
5628
5629 I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE);
5630 }
5631
5632 void intel_init_clock_gating(struct drm_device *dev)
5633 {
5634 struct drm_i915_private *dev_priv = dev->dev_private;
5635
5636 dev_priv->display.init_clock_gating(dev);
5637 }
5638
5639 void intel_suspend_hw(struct drm_device *dev)
5640 {
5641 if (HAS_PCH_LPT(dev))
5642 lpt_suspend_hw(dev);
5643 }
5644
5645 static bool is_always_on_power_domain(struct drm_device *dev,
5646 enum intel_display_power_domain domain)
5647 {
5648 unsigned long always_on_domains;
5649
5650 BUG_ON(BIT(domain) & ~POWER_DOMAIN_MASK);
5651
5652 if (IS_BROADWELL(dev)) {
5653 always_on_domains = BDW_ALWAYS_ON_POWER_DOMAINS;
5654 } else if (IS_HASWELL(dev)) {
5655 always_on_domains = HSW_ALWAYS_ON_POWER_DOMAINS;
5656 } else {
5657 WARN_ON(1);
5658 return true;
5659 }
5660
5661 return BIT(domain) & always_on_domains;
5662 }
5663
5664 /**
5665 * We should only use the power well if we explicitly asked the hardware to
5666 * enable it, so check if it's enabled and also check if we've requested it to
5667 * be enabled.
5668 */
5669 bool intel_display_power_enabled(struct drm_device *dev,
5670 enum intel_display_power_domain domain)
5671 {
5672 struct drm_i915_private *dev_priv = dev->dev_private;
5673
5674 if (!HAS_POWER_WELL(dev))
5675 return true;
5676
5677 if (is_always_on_power_domain(dev, domain))
5678 return true;
5679
5680 return I915_READ(HSW_PWR_WELL_DRIVER) ==
5681 (HSW_PWR_WELL_ENABLE_REQUEST | HSW_PWR_WELL_STATE_ENABLED);
5682 }
5683
5684 static void __intel_set_power_well(struct drm_device *dev, bool enable)
5685 {
5686 struct drm_i915_private *dev_priv = dev->dev_private;
5687 bool is_enabled, enable_requested;
5688 uint32_t tmp;
5689
5690 tmp = I915_READ(HSW_PWR_WELL_DRIVER);
5691 is_enabled = tmp & HSW_PWR_WELL_STATE_ENABLED;
5692 enable_requested = tmp & HSW_PWR_WELL_ENABLE_REQUEST;
5693
5694 if (enable) {
5695 if (!enable_requested)
5696 I915_WRITE(HSW_PWR_WELL_DRIVER,
5697 HSW_PWR_WELL_ENABLE_REQUEST);
5698
5699 if (!is_enabled) {
5700 DRM_DEBUG_KMS("Enabling power well\n");
5701 if (wait_for((I915_READ(HSW_PWR_WELL_DRIVER) &
5702 HSW_PWR_WELL_STATE_ENABLED), 20))
5703 DRM_ERROR("Timeout enabling power well\n");
5704 }
5705 } else {
5706 if (enable_requested) {
5707 unsigned long irqflags;
5708 enum pipe p;
5709
5710 I915_WRITE(HSW_PWR_WELL_DRIVER, 0);
5711 POSTING_READ(HSW_PWR_WELL_DRIVER);
5712 DRM_DEBUG_KMS("Requesting to disable the power well\n");
5713
5714 /*
5715 * After this, the registers on the pipes that are part
5716 * of the power well will become zero, so we have to
5717 * adjust our counters according to that.
5718 *
5719 * FIXME: Should we do this in general in
5720 * drm_vblank_post_modeset?
5721 */
5722 spin_lock_irqsave(&dev->vbl_lock, irqflags);
5723 for_each_pipe(p)
5724 if (p != PIPE_A)
5725 dev->vblank[p].last = 0;
5726 spin_unlock_irqrestore(&dev->vbl_lock, irqflags);
5727 }
5728 }
5729 }
5730
5731 static void __intel_power_well_get(struct drm_device *dev,
5732 struct i915_power_well *power_well)
5733 {
5734 if (!power_well->count++)
5735 __intel_set_power_well(dev, true);
5736 }
5737
5738 static void __intel_power_well_put(struct drm_device *dev,
5739 struct i915_power_well *power_well)
5740 {
5741 WARN_ON(!power_well->count);
5742 if (!--power_well->count && i915_disable_power_well)
5743 __intel_set_power_well(dev, false);
5744 }
5745
5746 void intel_display_power_get(struct drm_device *dev,
5747 enum intel_display_power_domain domain)
5748 {
5749 struct drm_i915_private *dev_priv = dev->dev_private;
5750 struct i915_power_domains *power_domains;
5751
5752 if (!HAS_POWER_WELL(dev))
5753 return;
5754
5755 if (is_always_on_power_domain(dev, domain))
5756 return;
5757
5758 power_domains = &dev_priv->power_domains;
5759
5760 mutex_lock(&power_domains->lock);
5761 __intel_power_well_get(dev, &power_domains->power_wells[0]);
5762 mutex_unlock(&power_domains->lock);
5763 }
5764
5765 void intel_display_power_put(struct drm_device *dev,
5766 enum intel_display_power_domain domain)
5767 {
5768 struct drm_i915_private *dev_priv = dev->dev_private;
5769 struct i915_power_domains *power_domains;
5770
5771 if (!HAS_POWER_WELL(dev))
5772 return;
5773
5774 if (is_always_on_power_domain(dev, domain))
5775 return;
5776
5777 power_domains = &dev_priv->power_domains;
5778
5779 mutex_lock(&power_domains->lock);
5780 __intel_power_well_put(dev, &power_domains->power_wells[0]);
5781 mutex_unlock(&power_domains->lock);
5782 }
5783
5784 static struct i915_power_domains *hsw_pwr;
5785
5786 /* Display audio driver power well request */
5787 void i915_request_power_well(void)
5788 {
5789 struct drm_i915_private *dev_priv;
5790
5791 if (WARN_ON(!hsw_pwr))
5792 return;
5793
5794 dev_priv = container_of(hsw_pwr, struct drm_i915_private,
5795 power_domains);
5796
5797 mutex_lock(&hsw_pwr->lock);
5798 __intel_power_well_get(dev_priv->dev, &hsw_pwr->power_wells[0]);
5799 mutex_unlock(&hsw_pwr->lock);
5800 }
5801 EXPORT_SYMBOL_GPL(i915_request_power_well);
5802
5803 /* Display audio driver power well release */
5804 void i915_release_power_well(void)
5805 {
5806 struct drm_i915_private *dev_priv;
5807
5808 if (WARN_ON(!hsw_pwr))
5809 return;
5810
5811 dev_priv = container_of(hsw_pwr, struct drm_i915_private,
5812 power_domains);
5813
5814 mutex_lock(&hsw_pwr->lock);
5815 __intel_power_well_put(dev_priv->dev, &hsw_pwr->power_wells[0]);
5816 mutex_unlock(&hsw_pwr->lock);
5817 }
5818 EXPORT_SYMBOL_GPL(i915_release_power_well);
5819
5820 int intel_power_domains_init(struct drm_device *dev)
5821 {
5822 struct drm_i915_private *dev_priv = dev->dev_private;
5823 struct i915_power_domains *power_domains = &dev_priv->power_domains;
5824 struct i915_power_well *power_well;
5825
5826 mutex_init(&power_domains->lock);
5827 hsw_pwr = power_domains;
5828
5829 power_well = &power_domains->power_wells[0];
5830 power_well->count = 0;
5831
5832 return 0;
5833 }
5834
5835 void intel_power_domains_remove(struct drm_device *dev)
5836 {
5837 hsw_pwr = NULL;
5838 }
5839
5840 static void intel_power_domains_resume(struct drm_device *dev)
5841 {
5842 struct drm_i915_private *dev_priv = dev->dev_private;
5843 struct i915_power_domains *power_domains = &dev_priv->power_domains;
5844 struct i915_power_well *power_well;
5845
5846 if (!HAS_POWER_WELL(dev))
5847 return;
5848
5849 mutex_lock(&power_domains->lock);
5850
5851 power_well = &power_domains->power_wells[0];
5852 __intel_set_power_well(dev, power_well->count > 0);
5853
5854 mutex_unlock(&power_domains->lock);
5855 }
5856
5857 /*
5858 * Starting with Haswell, we have a "Power Down Well" that can be turned off
5859 * when not needed anymore. We have 4 registers that can request the power well
5860 * to be enabled, and it will only be disabled if none of the registers is
5861 * requesting it to be enabled.
5862 */
5863 void intel_power_domains_init_hw(struct drm_device *dev)
5864 {
5865 struct drm_i915_private *dev_priv = dev->dev_private;
5866
5867 if (!HAS_POWER_WELL(dev))
5868 return;
5869
5870 /* For now, we need the power well to be always enabled. */
5871 intel_display_set_init_power(dev, true);
5872 intel_power_domains_resume(dev);
5873
5874 /* We're taking over the BIOS, so clear any requests made by it since
5875 * the driver is in charge now. */
5876 if (I915_READ(HSW_PWR_WELL_BIOS) & HSW_PWR_WELL_ENABLE_REQUEST)
5877 I915_WRITE(HSW_PWR_WELL_BIOS, 0);
5878 }
5879
5880 /* Disables PC8 so we can use the GMBUS and DP AUX interrupts. */
5881 void intel_aux_display_runtime_get(struct drm_i915_private *dev_priv)
5882 {
5883 hsw_disable_package_c8(dev_priv);
5884 }
5885
5886 void intel_aux_display_runtime_put(struct drm_i915_private *dev_priv)
5887 {
5888 hsw_enable_package_c8(dev_priv);
5889 }
5890
5891 /* Set up chip specific power management-related functions */
5892 void intel_init_pm(struct drm_device *dev)
5893 {
5894 struct drm_i915_private *dev_priv = dev->dev_private;
5895
5896 if (I915_HAS_FBC(dev)) {
5897 if (HAS_PCH_SPLIT(dev)) {
5898 dev_priv->display.fbc_enabled = ironlake_fbc_enabled;
5899 if (IS_IVYBRIDGE(dev) || IS_HASWELL(dev))
5900 dev_priv->display.enable_fbc =
5901 gen7_enable_fbc;
5902 else
5903 dev_priv->display.enable_fbc =
5904 ironlake_enable_fbc;
5905 dev_priv->display.disable_fbc = ironlake_disable_fbc;
5906 } else if (IS_GM45(dev)) {
5907 dev_priv->display.fbc_enabled = g4x_fbc_enabled;
5908 dev_priv->display.enable_fbc = g4x_enable_fbc;
5909 dev_priv->display.disable_fbc = g4x_disable_fbc;
5910 } else if (IS_CRESTLINE(dev)) {
5911 dev_priv->display.fbc_enabled = i8xx_fbc_enabled;
5912 dev_priv->display.enable_fbc = i8xx_enable_fbc;
5913 dev_priv->display.disable_fbc = i8xx_disable_fbc;
5914 }
5915 /* 855GM needs testing */
5916 }
5917
5918 /* For cxsr */
5919 if (IS_PINEVIEW(dev))
5920 i915_pineview_get_mem_freq(dev);
5921 else if (IS_GEN5(dev))
5922 i915_ironlake_get_mem_freq(dev);
5923
5924 /* For FIFO watermark updates */
5925 if (HAS_PCH_SPLIT(dev)) {
5926 intel_setup_wm_latency(dev);
5927
5928 if (IS_GEN5(dev)) {
5929 if (dev_priv->wm.pri_latency[1] &&
5930 dev_priv->wm.spr_latency[1] &&
5931 dev_priv->wm.cur_latency[1])
5932 dev_priv->display.update_wm = ironlake_update_wm;
5933 else {
5934 DRM_DEBUG_KMS("Failed to get proper latency. "
5935 "Disable CxSR\n");
5936 dev_priv->display.update_wm = NULL;
5937 }
5938 dev_priv->display.init_clock_gating = ironlake_init_clock_gating;
5939 } else if (IS_GEN6(dev)) {
5940 if (dev_priv->wm.pri_latency[0] &&
5941 dev_priv->wm.spr_latency[0] &&
5942 dev_priv->wm.cur_latency[0]) {
5943 dev_priv->display.update_wm = sandybridge_update_wm;
5944 dev_priv->display.update_sprite_wm = sandybridge_update_sprite_wm;
5945 } else {
5946 DRM_DEBUG_KMS("Failed to read display plane latency. "
5947 "Disable CxSR\n");
5948 dev_priv->display.update_wm = NULL;
5949 }
5950 dev_priv->display.init_clock_gating = gen6_init_clock_gating;
5951 } else if (IS_IVYBRIDGE(dev)) {
5952 if (dev_priv->wm.pri_latency[0] &&
5953 dev_priv->wm.spr_latency[0] &&
5954 dev_priv->wm.cur_latency[0]) {
5955 dev_priv->display.update_wm = ivybridge_update_wm;
5956 dev_priv->display.update_sprite_wm = sandybridge_update_sprite_wm;
5957 } else {
5958 DRM_DEBUG_KMS("Failed to read display plane latency. "
5959 "Disable CxSR\n");
5960 dev_priv->display.update_wm = NULL;
5961 }
5962 dev_priv->display.init_clock_gating = ivybridge_init_clock_gating;
5963 } else if (IS_HASWELL(dev)) {
5964 if (dev_priv->wm.pri_latency[0] &&
5965 dev_priv->wm.spr_latency[0] &&
5966 dev_priv->wm.cur_latency[0]) {
5967 dev_priv->display.update_wm = haswell_update_wm;
5968 dev_priv->display.update_sprite_wm =
5969 haswell_update_sprite_wm;
5970 } else {
5971 DRM_DEBUG_KMS("Failed to read display plane latency. "
5972 "Disable CxSR\n");
5973 dev_priv->display.update_wm = NULL;
5974 }
5975 dev_priv->display.init_clock_gating = haswell_init_clock_gating;
5976 } else if (INTEL_INFO(dev)->gen == 8) {
5977 dev_priv->display.init_clock_gating = gen8_init_clock_gating;
5978 } else
5979 dev_priv->display.update_wm = NULL;
5980 } else if (IS_VALLEYVIEW(dev)) {
5981 dev_priv->display.update_wm = valleyview_update_wm;
5982 dev_priv->display.init_clock_gating =
5983 valleyview_init_clock_gating;
5984 } else if (IS_PINEVIEW(dev)) {
5985 if (!intel_get_cxsr_latency(IS_PINEVIEW_G(dev),
5986 dev_priv->is_ddr3,
5987 dev_priv->fsb_freq,
5988 dev_priv->mem_freq)) {
5989 DRM_INFO("failed to find known CxSR latency "
5990 "(found ddr%s fsb freq %d, mem freq %d), "
5991 "disabling CxSR\n",
5992 (dev_priv->is_ddr3 == 1) ? "3" : "2",
5993 dev_priv->fsb_freq, dev_priv->mem_freq);
5994 /* Disable CxSR and never update its watermark again */
5995 pineview_disable_cxsr(dev);
5996 dev_priv->display.update_wm = NULL;
5997 } else
5998 dev_priv->display.update_wm = pineview_update_wm;
5999 dev_priv->display.init_clock_gating = gen3_init_clock_gating;
6000 } else if (IS_G4X(dev)) {
6001 dev_priv->display.update_wm = g4x_update_wm;
6002 dev_priv->display.init_clock_gating = g4x_init_clock_gating;
6003 } else if (IS_GEN4(dev)) {
6004 dev_priv->display.update_wm = i965_update_wm;
6005 if (IS_CRESTLINE(dev))
6006 dev_priv->display.init_clock_gating = crestline_init_clock_gating;
6007 else if (IS_BROADWATER(dev))
6008 dev_priv->display.init_clock_gating = broadwater_init_clock_gating;
6009 } else if (IS_GEN3(dev)) {
6010 dev_priv->display.update_wm = i9xx_update_wm;
6011 dev_priv->display.get_fifo_size = i9xx_get_fifo_size;
6012 dev_priv->display.init_clock_gating = gen3_init_clock_gating;
6013 } else if (IS_I865G(dev)) {
6014 dev_priv->display.update_wm = i830_update_wm;
6015 dev_priv->display.init_clock_gating = i85x_init_clock_gating;
6016 dev_priv->display.get_fifo_size = i830_get_fifo_size;
6017 } else if (IS_I85X(dev)) {
6018 dev_priv->display.update_wm = i9xx_update_wm;
6019 dev_priv->display.get_fifo_size = i85x_get_fifo_size;
6020 dev_priv->display.init_clock_gating = i85x_init_clock_gating;
6021 } else {
6022 dev_priv->display.update_wm = i830_update_wm;
6023 dev_priv->display.init_clock_gating = i830_init_clock_gating;
6024 if (IS_845G(dev))
6025 dev_priv->display.get_fifo_size = i845_get_fifo_size;
6026 else
6027 dev_priv->display.get_fifo_size = i830_get_fifo_size;
6028 }
6029 }
6030
6031 int sandybridge_pcode_read(struct drm_i915_private *dev_priv, u8 mbox, u32 *val)
6032 {
6033 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
6034
6035 if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) {
6036 DRM_DEBUG_DRIVER("warning: pcode (read) mailbox access failed\n");
6037 return -EAGAIN;
6038 }
6039
6040 I915_WRITE(GEN6_PCODE_DATA, *val);
6041 I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);
6042
6043 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
6044 500)) {
6045 DRM_ERROR("timeout waiting for pcode read (%d) to finish\n", mbox);
6046 return -ETIMEDOUT;
6047 }
6048
6049 *val = I915_READ(GEN6_PCODE_DATA);
6050 I915_WRITE(GEN6_PCODE_DATA, 0);
6051
6052 return 0;
6053 }
6054
6055 int sandybridge_pcode_write(struct drm_i915_private *dev_priv, u8 mbox, u32 val)
6056 {
6057 WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
6058
6059 if (I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) {
6060 DRM_DEBUG_DRIVER("warning: pcode (write) mailbox access failed\n");
6061 return -EAGAIN;
6062 }
6063
6064 I915_WRITE(GEN6_PCODE_DATA, val);
6065 I915_WRITE(GEN6_PCODE_MAILBOX, GEN6_PCODE_READY | mbox);
6066
6067 if (wait_for((I915_READ(GEN6_PCODE_MAILBOX) & GEN6_PCODE_READY) == 0,
6068 500)) {
6069 DRM_ERROR("timeout waiting for pcode write (%d) to finish\n", mbox);
6070 return -ETIMEDOUT;
6071 }
6072
6073 I915_WRITE(GEN6_PCODE_DATA, 0);
6074
6075 return 0;
6076 }
6077
6078 int vlv_gpu_freq(int ddr_freq, int val)
6079 {
6080 int mult, base;
6081
6082 switch (ddr_freq) {
6083 case 800:
6084 mult = 20;
6085 base = 120;
6086 break;
6087 case 1066:
6088 mult = 22;
6089 base = 133;
6090 break;
6091 case 1333:
6092 mult = 21;
6093 base = 125;
6094 break;
6095 default:
6096 return -1;
6097 }
6098
6099 return ((val - 0xbd) * mult) + base;
6100 }
6101
6102 int vlv_freq_opcode(int ddr_freq, int val)
6103 {
6104 int mult, base;
6105
6106 switch (ddr_freq) {
6107 case 800:
6108 mult = 20;
6109 base = 120;
6110 break;
6111 case 1066:
6112 mult = 22;
6113 base = 133;
6114 break;
6115 case 1333:
6116 mult = 21;
6117 base = 125;
6118 break;
6119 default:
6120 return -1;
6121 }
6122
6123 val /= mult;
6124 val -= base / mult;
6125 val += 0xbd;
6126
6127 if (val > 0xea)
6128 val = 0xea;
6129
6130 return val;
6131 }
6132
6133 void intel_pm_init(struct drm_device *dev)
6134 {
6135 struct drm_i915_private *dev_priv = dev->dev_private;
6136
6137 INIT_DELAYED_WORK(&dev_priv->rps.delayed_resume_work,
6138 intel_gen6_powersave_work);
6139 }
Linux kernel - Deliverables
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