Commit | Line | Data |
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7ff0ebcc RV |
1 | /* |
2 | * Copyright © 2014 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 | |
21 | * DEALINGS IN THE SOFTWARE. | |
22 | */ | |
23 | ||
94b83957 RV |
24 | /** |
25 | * DOC: Frame Buffer Compression (FBC) | |
26 | * | |
27 | * FBC tries to save memory bandwidth (and so power consumption) by | |
28 | * compressing the amount of memory used by the display. It is total | |
29 | * transparent to user space and completely handled in the kernel. | |
7ff0ebcc RV |
30 | * |
31 | * The benefits of FBC are mostly visible with solid backgrounds and | |
94b83957 RV |
32 | * variation-less patterns. It comes from keeping the memory footprint small |
33 | * and having fewer memory pages opened and accessed for refreshing the display. | |
7ff0ebcc | 34 | * |
94b83957 RV |
35 | * i915 is responsible to reserve stolen memory for FBC and configure its |
36 | * offset on proper registers. The hardware takes care of all | |
37 | * compress/decompress. However there are many known cases where we have to | |
38 | * forcibly disable it to allow proper screen updates. | |
7ff0ebcc RV |
39 | */ |
40 | ||
94b83957 RV |
41 | #include "intel_drv.h" |
42 | #include "i915_drv.h" | |
43 | ||
9f218336 PZ |
44 | static inline bool fbc_supported(struct drm_i915_private *dev_priv) |
45 | { | |
8c40074c | 46 | return HAS_FBC(dev_priv); |
9f218336 PZ |
47 | } |
48 | ||
57105022 PZ |
49 | static inline bool fbc_on_pipe_a_only(struct drm_i915_private *dev_priv) |
50 | { | |
51 | return IS_HASWELL(dev_priv) || INTEL_INFO(dev_priv)->gen >= 8; | |
52 | } | |
53 | ||
e6cd6dc1 PZ |
54 | static inline bool fbc_on_plane_a_only(struct drm_i915_private *dev_priv) |
55 | { | |
56 | return INTEL_INFO(dev_priv)->gen < 4; | |
57 | } | |
58 | ||
010cf73d PZ |
59 | static inline bool no_fbc_on_multiple_pipes(struct drm_i915_private *dev_priv) |
60 | { | |
61 | return INTEL_INFO(dev_priv)->gen <= 3; | |
62 | } | |
63 | ||
2db3366b PZ |
64 | /* |
65 | * In some platforms where the CRTC's x:0/y:0 coordinates doesn't match the | |
66 | * frontbuffer's x:0/y:0 coordinates we lie to the hardware about the plane's | |
67 | * origin so the x and y offsets can actually fit the registers. As a | |
68 | * consequence, the fence doesn't really start exactly at the display plane | |
69 | * address we program because it starts at the real start of the buffer, so we | |
70 | * have to take this into consideration here. | |
71 | */ | |
72 | static unsigned int get_crtc_fence_y_offset(struct intel_crtc *crtc) | |
73 | { | |
74 | return crtc->base.y - crtc->adjusted_y; | |
75 | } | |
76 | ||
c5ecd469 PZ |
77 | /* |
78 | * For SKL+, the plane source size used by the hardware is based on the value we | |
79 | * write to the PLANE_SIZE register. For BDW-, the hardware looks at the value | |
80 | * we wrote to PIPESRC. | |
81 | */ | |
aaf78d27 | 82 | static void intel_fbc_get_plane_source_size(struct intel_fbc_state_cache *cache, |
c5ecd469 PZ |
83 | int *width, int *height) |
84 | { | |
c5ecd469 PZ |
85 | int w, h; |
86 | ||
aaf78d27 PZ |
87 | if (intel_rotation_90_or_270(cache->plane.rotation)) { |
88 | w = cache->plane.src_h; | |
89 | h = cache->plane.src_w; | |
c5ecd469 | 90 | } else { |
aaf78d27 PZ |
91 | w = cache->plane.src_w; |
92 | h = cache->plane.src_h; | |
c5ecd469 PZ |
93 | } |
94 | ||
95 | if (width) | |
96 | *width = w; | |
97 | if (height) | |
98 | *height = h; | |
99 | } | |
100 | ||
aaf78d27 PZ |
101 | static int intel_fbc_calculate_cfb_size(struct drm_i915_private *dev_priv, |
102 | struct intel_fbc_state_cache *cache) | |
c5ecd469 | 103 | { |
c5ecd469 PZ |
104 | int lines; |
105 | ||
aaf78d27 | 106 | intel_fbc_get_plane_source_size(cache, NULL, &lines); |
c5ecd469 PZ |
107 | if (INTEL_INFO(dev_priv)->gen >= 7) |
108 | lines = min(lines, 2048); | |
109 | ||
110 | /* Hardware needs the full buffer stride, not just the active area. */ | |
aaf78d27 | 111 | return lines * cache->fb.stride; |
c5ecd469 PZ |
112 | } |
113 | ||
0e631adc | 114 | static void i8xx_fbc_deactivate(struct drm_i915_private *dev_priv) |
7ff0ebcc | 115 | { |
7ff0ebcc RV |
116 | u32 fbc_ctl; |
117 | ||
7ff0ebcc RV |
118 | /* Disable compression */ |
119 | fbc_ctl = I915_READ(FBC_CONTROL); | |
120 | if ((fbc_ctl & FBC_CTL_EN) == 0) | |
121 | return; | |
122 | ||
123 | fbc_ctl &= ~FBC_CTL_EN; | |
124 | I915_WRITE(FBC_CONTROL, fbc_ctl); | |
125 | ||
126 | /* Wait for compressing bit to clear */ | |
8d90dfd5 CW |
127 | if (intel_wait_for_register(dev_priv, |
128 | FBC_STATUS, FBC_STAT_COMPRESSING, 0, | |
129 | 10)) { | |
7ff0ebcc RV |
130 | DRM_DEBUG_KMS("FBC idle timed out\n"); |
131 | return; | |
132 | } | |
7ff0ebcc RV |
133 | } |
134 | ||
b183b3f1 | 135 | static void i8xx_fbc_activate(struct drm_i915_private *dev_priv) |
7ff0ebcc | 136 | { |
b183b3f1 | 137 | struct intel_fbc_reg_params *params = &dev_priv->fbc.params; |
7ff0ebcc RV |
138 | int cfb_pitch; |
139 | int i; | |
140 | u32 fbc_ctl; | |
141 | ||
60ee5cd2 | 142 | /* Note: fbc.threshold == 1 for i8xx */ |
b183b3f1 PZ |
143 | cfb_pitch = params->cfb_size / FBC_LL_SIZE; |
144 | if (params->fb.stride < cfb_pitch) | |
145 | cfb_pitch = params->fb.stride; | |
7ff0ebcc RV |
146 | |
147 | /* FBC_CTL wants 32B or 64B units */ | |
7733b49b | 148 | if (IS_GEN2(dev_priv)) |
7ff0ebcc RV |
149 | cfb_pitch = (cfb_pitch / 32) - 1; |
150 | else | |
151 | cfb_pitch = (cfb_pitch / 64) - 1; | |
152 | ||
153 | /* Clear old tags */ | |
154 | for (i = 0; i < (FBC_LL_SIZE / 32) + 1; i++) | |
4d110c71 | 155 | I915_WRITE(FBC_TAG(i), 0); |
7ff0ebcc | 156 | |
7733b49b | 157 | if (IS_GEN4(dev_priv)) { |
7ff0ebcc RV |
158 | u32 fbc_ctl2; |
159 | ||
160 | /* Set it up... */ | |
161 | fbc_ctl2 = FBC_CTL_FENCE_DBL | FBC_CTL_IDLE_IMM | FBC_CTL_CPU_FENCE; | |
b183b3f1 | 162 | fbc_ctl2 |= FBC_CTL_PLANE(params->crtc.plane); |
7ff0ebcc | 163 | I915_WRITE(FBC_CONTROL2, fbc_ctl2); |
b183b3f1 | 164 | I915_WRITE(FBC_FENCE_OFF, params->crtc.fence_y_offset); |
7ff0ebcc RV |
165 | } |
166 | ||
167 | /* enable it... */ | |
168 | fbc_ctl = I915_READ(FBC_CONTROL); | |
169 | fbc_ctl &= 0x3fff << FBC_CTL_INTERVAL_SHIFT; | |
170 | fbc_ctl |= FBC_CTL_EN | FBC_CTL_PERIODIC; | |
7733b49b | 171 | if (IS_I945GM(dev_priv)) |
7ff0ebcc RV |
172 | fbc_ctl |= FBC_CTL_C3_IDLE; /* 945 needs special SR handling */ |
173 | fbc_ctl |= (cfb_pitch & 0xff) << FBC_CTL_STRIDE_SHIFT; | |
b183b3f1 | 174 | fbc_ctl |= params->fb.fence_reg; |
7ff0ebcc | 175 | I915_WRITE(FBC_CONTROL, fbc_ctl); |
7ff0ebcc RV |
176 | } |
177 | ||
0e631adc | 178 | static bool i8xx_fbc_is_active(struct drm_i915_private *dev_priv) |
7ff0ebcc | 179 | { |
7ff0ebcc RV |
180 | return I915_READ(FBC_CONTROL) & FBC_CTL_EN; |
181 | } | |
182 | ||
b183b3f1 | 183 | static void g4x_fbc_activate(struct drm_i915_private *dev_priv) |
7ff0ebcc | 184 | { |
b183b3f1 | 185 | struct intel_fbc_reg_params *params = &dev_priv->fbc.params; |
7ff0ebcc RV |
186 | u32 dpfc_ctl; |
187 | ||
b183b3f1 PZ |
188 | dpfc_ctl = DPFC_CTL_PLANE(params->crtc.plane) | DPFC_SR_EN; |
189 | if (drm_format_plane_cpp(params->fb.pixel_format, 0) == 2) | |
7ff0ebcc RV |
190 | dpfc_ctl |= DPFC_CTL_LIMIT_2X; |
191 | else | |
192 | dpfc_ctl |= DPFC_CTL_LIMIT_1X; | |
7ff0ebcc | 193 | |
12ecf4b9 CW |
194 | if (params->fb.fence_reg != I915_FENCE_REG_NONE) { |
195 | dpfc_ctl |= DPFC_CTL_FENCE_EN | params->fb.fence_reg; | |
196 | I915_WRITE(DPFC_FENCE_YOFF, params->crtc.fence_y_offset); | |
197 | } else { | |
198 | I915_WRITE(DPFC_FENCE_YOFF, 0); | |
199 | } | |
7ff0ebcc RV |
200 | |
201 | /* enable it... */ | |
202 | I915_WRITE(DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN); | |
7ff0ebcc RV |
203 | } |
204 | ||
0e631adc | 205 | static void g4x_fbc_deactivate(struct drm_i915_private *dev_priv) |
7ff0ebcc | 206 | { |
7ff0ebcc RV |
207 | u32 dpfc_ctl; |
208 | ||
7ff0ebcc RV |
209 | /* Disable compression */ |
210 | dpfc_ctl = I915_READ(DPFC_CONTROL); | |
211 | if (dpfc_ctl & DPFC_CTL_EN) { | |
212 | dpfc_ctl &= ~DPFC_CTL_EN; | |
213 | I915_WRITE(DPFC_CONTROL, dpfc_ctl); | |
7ff0ebcc RV |
214 | } |
215 | } | |
216 | ||
0e631adc | 217 | static bool g4x_fbc_is_active(struct drm_i915_private *dev_priv) |
7ff0ebcc | 218 | { |
7ff0ebcc RV |
219 | return I915_READ(DPFC_CONTROL) & DPFC_CTL_EN; |
220 | } | |
221 | ||
d5ce4164 PZ |
222 | /* This function forces a CFB recompression through the nuke operation. */ |
223 | static void intel_fbc_recompress(struct drm_i915_private *dev_priv) | |
7ff0ebcc | 224 | { |
dbef0f15 PZ |
225 | I915_WRITE(MSG_FBC_REND_STATE, FBC_REND_NUKE); |
226 | POSTING_READ(MSG_FBC_REND_STATE); | |
7ff0ebcc RV |
227 | } |
228 | ||
b183b3f1 | 229 | static void ilk_fbc_activate(struct drm_i915_private *dev_priv) |
7ff0ebcc | 230 | { |
b183b3f1 | 231 | struct intel_fbc_reg_params *params = &dev_priv->fbc.params; |
7ff0ebcc | 232 | u32 dpfc_ctl; |
ce65e47b | 233 | int threshold = dev_priv->fbc.threshold; |
7ff0ebcc | 234 | |
b183b3f1 PZ |
235 | dpfc_ctl = DPFC_CTL_PLANE(params->crtc.plane); |
236 | if (drm_format_plane_cpp(params->fb.pixel_format, 0) == 2) | |
ce65e47b | 237 | threshold++; |
7ff0ebcc | 238 | |
ce65e47b | 239 | switch (threshold) { |
7ff0ebcc RV |
240 | case 4: |
241 | case 3: | |
242 | dpfc_ctl |= DPFC_CTL_LIMIT_4X; | |
243 | break; | |
244 | case 2: | |
245 | dpfc_ctl |= DPFC_CTL_LIMIT_2X; | |
246 | break; | |
247 | case 1: | |
248 | dpfc_ctl |= DPFC_CTL_LIMIT_1X; | |
249 | break; | |
250 | } | |
12ecf4b9 CW |
251 | |
252 | if (params->fb.fence_reg != I915_FENCE_REG_NONE) { | |
253 | dpfc_ctl |= DPFC_CTL_FENCE_EN; | |
254 | if (IS_GEN5(dev_priv)) | |
255 | dpfc_ctl |= params->fb.fence_reg; | |
256 | if (IS_GEN6(dev_priv)) { | |
257 | I915_WRITE(SNB_DPFC_CTL_SA, | |
258 | SNB_CPU_FENCE_ENABLE | params->fb.fence_reg); | |
259 | I915_WRITE(DPFC_CPU_FENCE_OFFSET, | |
260 | params->crtc.fence_y_offset); | |
261 | } | |
262 | } else { | |
263 | if (IS_GEN6(dev_priv)) { | |
264 | I915_WRITE(SNB_DPFC_CTL_SA, 0); | |
265 | I915_WRITE(DPFC_CPU_FENCE_OFFSET, 0); | |
266 | } | |
267 | } | |
7ff0ebcc | 268 | |
b183b3f1 PZ |
269 | I915_WRITE(ILK_DPFC_FENCE_YOFF, params->crtc.fence_y_offset); |
270 | I915_WRITE(ILK_FBC_RT_BASE, params->fb.ggtt_offset | ILK_FBC_RT_VALID); | |
7ff0ebcc RV |
271 | /* enable it... */ |
272 | I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN); | |
273 | ||
d5ce4164 | 274 | intel_fbc_recompress(dev_priv); |
7ff0ebcc RV |
275 | } |
276 | ||
0e631adc | 277 | static void ilk_fbc_deactivate(struct drm_i915_private *dev_priv) |
7ff0ebcc | 278 | { |
7ff0ebcc RV |
279 | u32 dpfc_ctl; |
280 | ||
7ff0ebcc RV |
281 | /* Disable compression */ |
282 | dpfc_ctl = I915_READ(ILK_DPFC_CONTROL); | |
283 | if (dpfc_ctl & DPFC_CTL_EN) { | |
284 | dpfc_ctl &= ~DPFC_CTL_EN; | |
285 | I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl); | |
7ff0ebcc RV |
286 | } |
287 | } | |
288 | ||
0e631adc | 289 | static bool ilk_fbc_is_active(struct drm_i915_private *dev_priv) |
7ff0ebcc | 290 | { |
7ff0ebcc RV |
291 | return I915_READ(ILK_DPFC_CONTROL) & DPFC_CTL_EN; |
292 | } | |
293 | ||
b183b3f1 | 294 | static void gen7_fbc_activate(struct drm_i915_private *dev_priv) |
7ff0ebcc | 295 | { |
b183b3f1 | 296 | struct intel_fbc_reg_params *params = &dev_priv->fbc.params; |
7ff0ebcc | 297 | u32 dpfc_ctl; |
ce65e47b | 298 | int threshold = dev_priv->fbc.threshold; |
7ff0ebcc | 299 | |
d8514d63 | 300 | dpfc_ctl = 0; |
7733b49b | 301 | if (IS_IVYBRIDGE(dev_priv)) |
b183b3f1 | 302 | dpfc_ctl |= IVB_DPFC_CTL_PLANE(params->crtc.plane); |
d8514d63 | 303 | |
b183b3f1 | 304 | if (drm_format_plane_cpp(params->fb.pixel_format, 0) == 2) |
ce65e47b | 305 | threshold++; |
7ff0ebcc | 306 | |
ce65e47b | 307 | switch (threshold) { |
7ff0ebcc RV |
308 | case 4: |
309 | case 3: | |
310 | dpfc_ctl |= DPFC_CTL_LIMIT_4X; | |
311 | break; | |
312 | case 2: | |
313 | dpfc_ctl |= DPFC_CTL_LIMIT_2X; | |
314 | break; | |
315 | case 1: | |
316 | dpfc_ctl |= DPFC_CTL_LIMIT_1X; | |
317 | break; | |
318 | } | |
319 | ||
12ecf4b9 CW |
320 | if (params->fb.fence_reg != I915_FENCE_REG_NONE) { |
321 | dpfc_ctl |= IVB_DPFC_CTL_FENCE_EN; | |
322 | I915_WRITE(SNB_DPFC_CTL_SA, | |
323 | SNB_CPU_FENCE_ENABLE | params->fb.fence_reg); | |
324 | I915_WRITE(DPFC_CPU_FENCE_OFFSET, params->crtc.fence_y_offset); | |
325 | } else { | |
326 | I915_WRITE(SNB_DPFC_CTL_SA,0); | |
327 | I915_WRITE(DPFC_CPU_FENCE_OFFSET, 0); | |
328 | } | |
7ff0ebcc RV |
329 | |
330 | if (dev_priv->fbc.false_color) | |
331 | dpfc_ctl |= FBC_CTL_FALSE_COLOR; | |
332 | ||
7733b49b | 333 | if (IS_IVYBRIDGE(dev_priv)) { |
7ff0ebcc RV |
334 | /* WaFbcAsynchFlipDisableFbcQueue:ivb */ |
335 | I915_WRITE(ILK_DISPLAY_CHICKEN1, | |
336 | I915_READ(ILK_DISPLAY_CHICKEN1) | | |
337 | ILK_FBCQ_DIS); | |
40f4022e | 338 | } else if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) { |
7ff0ebcc | 339 | /* WaFbcAsynchFlipDisableFbcQueue:hsw,bdw */ |
b183b3f1 PZ |
340 | I915_WRITE(CHICKEN_PIPESL_1(params->crtc.pipe), |
341 | I915_READ(CHICKEN_PIPESL_1(params->crtc.pipe)) | | |
7ff0ebcc RV |
342 | HSW_FBCQ_DIS); |
343 | } | |
344 | ||
57012be9 PZ |
345 | I915_WRITE(ILK_DPFC_CONTROL, dpfc_ctl | DPFC_CTL_EN); |
346 | ||
d5ce4164 | 347 | intel_fbc_recompress(dev_priv); |
7ff0ebcc RV |
348 | } |
349 | ||
8c40074c PZ |
350 | static bool intel_fbc_hw_is_active(struct drm_i915_private *dev_priv) |
351 | { | |
352 | if (INTEL_INFO(dev_priv)->gen >= 5) | |
353 | return ilk_fbc_is_active(dev_priv); | |
354 | else if (IS_GM45(dev_priv)) | |
355 | return g4x_fbc_is_active(dev_priv); | |
356 | else | |
357 | return i8xx_fbc_is_active(dev_priv); | |
358 | } | |
359 | ||
360 | static void intel_fbc_hw_activate(struct drm_i915_private *dev_priv) | |
361 | { | |
5375ce9f PZ |
362 | struct intel_fbc *fbc = &dev_priv->fbc; |
363 | ||
364 | fbc->active = true; | |
365 | ||
8c40074c PZ |
366 | if (INTEL_INFO(dev_priv)->gen >= 7) |
367 | gen7_fbc_activate(dev_priv); | |
368 | else if (INTEL_INFO(dev_priv)->gen >= 5) | |
369 | ilk_fbc_activate(dev_priv); | |
370 | else if (IS_GM45(dev_priv)) | |
371 | g4x_fbc_activate(dev_priv); | |
372 | else | |
373 | i8xx_fbc_activate(dev_priv); | |
374 | } | |
375 | ||
376 | static void intel_fbc_hw_deactivate(struct drm_i915_private *dev_priv) | |
377 | { | |
5375ce9f PZ |
378 | struct intel_fbc *fbc = &dev_priv->fbc; |
379 | ||
380 | fbc->active = false; | |
381 | ||
8c40074c PZ |
382 | if (INTEL_INFO(dev_priv)->gen >= 5) |
383 | ilk_fbc_deactivate(dev_priv); | |
384 | else if (IS_GM45(dev_priv)) | |
385 | g4x_fbc_deactivate(dev_priv); | |
386 | else | |
387 | i8xx_fbc_deactivate(dev_priv); | |
388 | } | |
389 | ||
94b83957 | 390 | /** |
0e631adc | 391 | * intel_fbc_is_active - Is FBC active? |
7733b49b | 392 | * @dev_priv: i915 device instance |
94b83957 RV |
393 | * |
394 | * This function is used to verify the current state of FBC. | |
2e7a5701 | 395 | * |
94b83957 | 396 | * FIXME: This should be tracked in the plane config eventually |
2e7a5701 | 397 | * instead of queried at runtime for most callers. |
94b83957 | 398 | */ |
0e631adc | 399 | bool intel_fbc_is_active(struct drm_i915_private *dev_priv) |
7ff0ebcc | 400 | { |
0e631adc | 401 | return dev_priv->fbc.active; |
7ff0ebcc RV |
402 | } |
403 | ||
7ff0ebcc RV |
404 | static void intel_fbc_work_fn(struct work_struct *__work) |
405 | { | |
128d7356 PZ |
406 | struct drm_i915_private *dev_priv = |
407 | container_of(__work, struct drm_i915_private, fbc.work.work); | |
ab34a7e8 PZ |
408 | struct intel_fbc *fbc = &dev_priv->fbc; |
409 | struct intel_fbc_work *work = &fbc->work; | |
410 | struct intel_crtc *crtc = fbc->crtc; | |
91c8a326 | 411 | struct drm_vblank_crtc *vblank = &dev_priv->drm.vblank[crtc->pipe]; |
ca18d51d PZ |
412 | |
413 | if (drm_crtc_vblank_get(&crtc->base)) { | |
414 | DRM_ERROR("vblank not available for FBC on pipe %c\n", | |
415 | pipe_name(crtc->pipe)); | |
416 | ||
ab34a7e8 | 417 | mutex_lock(&fbc->lock); |
ca18d51d | 418 | work->scheduled = false; |
ab34a7e8 | 419 | mutex_unlock(&fbc->lock); |
ca18d51d PZ |
420 | return; |
421 | } | |
128d7356 PZ |
422 | |
423 | retry: | |
424 | /* Delay the actual enabling to let pageflipping cease and the | |
425 | * display to settle before starting the compression. Note that | |
426 | * this delay also serves a second purpose: it allows for a | |
427 | * vblank to pass after disabling the FBC before we attempt | |
428 | * to modify the control registers. | |
429 | * | |
128d7356 | 430 | * WaFbcWaitForVBlankBeforeEnable:ilk,snb |
ca18d51d PZ |
431 | * |
432 | * It is also worth mentioning that since work->scheduled_vblank can be | |
433 | * updated multiple times by the other threads, hitting the timeout is | |
434 | * not an error condition. We'll just end up hitting the "goto retry" | |
435 | * case below. | |
128d7356 | 436 | */ |
ca18d51d PZ |
437 | wait_event_timeout(vblank->queue, |
438 | drm_crtc_vblank_count(&crtc->base) != work->scheduled_vblank, | |
439 | msecs_to_jiffies(50)); | |
7ff0ebcc | 440 | |
ab34a7e8 | 441 | mutex_lock(&fbc->lock); |
7ff0ebcc | 442 | |
128d7356 PZ |
443 | /* Were we cancelled? */ |
444 | if (!work->scheduled) | |
445 | goto out; | |
446 | ||
447 | /* Were we delayed again while this function was sleeping? */ | |
ca18d51d | 448 | if (drm_crtc_vblank_count(&crtc->base) == work->scheduled_vblank) { |
ab34a7e8 | 449 | mutex_unlock(&fbc->lock); |
128d7356 | 450 | goto retry; |
7ff0ebcc | 451 | } |
7ff0ebcc | 452 | |
8c40074c | 453 | intel_fbc_hw_activate(dev_priv); |
128d7356 PZ |
454 | |
455 | work->scheduled = false; | |
456 | ||
457 | out: | |
ab34a7e8 | 458 | mutex_unlock(&fbc->lock); |
ca18d51d | 459 | drm_crtc_vblank_put(&crtc->base); |
7ff0ebcc RV |
460 | } |
461 | ||
0e631adc | 462 | static void intel_fbc_schedule_activation(struct intel_crtc *crtc) |
7ff0ebcc | 463 | { |
fac5e23e | 464 | struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); |
ab34a7e8 PZ |
465 | struct intel_fbc *fbc = &dev_priv->fbc; |
466 | struct intel_fbc_work *work = &fbc->work; | |
7ff0ebcc | 467 | |
ab34a7e8 | 468 | WARN_ON(!mutex_is_locked(&fbc->lock)); |
25ad93fd | 469 | |
ca18d51d PZ |
470 | if (drm_crtc_vblank_get(&crtc->base)) { |
471 | DRM_ERROR("vblank not available for FBC on pipe %c\n", | |
472 | pipe_name(crtc->pipe)); | |
473 | return; | |
474 | } | |
475 | ||
e35be23f PZ |
476 | /* It is useless to call intel_fbc_cancel_work() or cancel_work() in |
477 | * this function since we're not releasing fbc.lock, so it won't have an | |
478 | * opportunity to grab it to discover that it was cancelled. So we just | |
479 | * update the expected jiffy count. */ | |
128d7356 | 480 | work->scheduled = true; |
ca18d51d PZ |
481 | work->scheduled_vblank = drm_crtc_vblank_count(&crtc->base); |
482 | drm_crtc_vblank_put(&crtc->base); | |
7ff0ebcc | 483 | |
128d7356 | 484 | schedule_work(&work->work); |
7ff0ebcc RV |
485 | } |
486 | ||
60eb2cc7 | 487 | static void intel_fbc_deactivate(struct drm_i915_private *dev_priv) |
25ad93fd | 488 | { |
ab34a7e8 PZ |
489 | struct intel_fbc *fbc = &dev_priv->fbc; |
490 | ||
491 | WARN_ON(!mutex_is_locked(&fbc->lock)); | |
25ad93fd | 492 | |
e35be23f PZ |
493 | /* Calling cancel_work() here won't help due to the fact that the work |
494 | * function grabs fbc->lock. Just set scheduled to false so the work | |
495 | * function can know it was cancelled. */ | |
496 | fbc->work.scheduled = false; | |
25ad93fd | 497 | |
ab34a7e8 | 498 | if (fbc->active) |
8c40074c | 499 | intel_fbc_hw_deactivate(dev_priv); |
754d1133 PZ |
500 | } |
501 | ||
faf68d92 ML |
502 | static bool multiple_pipes_ok(struct intel_crtc *crtc, |
503 | struct intel_plane_state *plane_state) | |
232fd934 | 504 | { |
faf68d92 | 505 | struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); |
010cf73d PZ |
506 | struct intel_fbc *fbc = &dev_priv->fbc; |
507 | enum pipe pipe = crtc->pipe; | |
232fd934 | 508 | |
010cf73d PZ |
509 | /* Don't even bother tracking anything we don't need. */ |
510 | if (!no_fbc_on_multiple_pipes(dev_priv)) | |
232fd934 PZ |
511 | return true; |
512 | ||
936e71e3 | 513 | if (plane_state->base.visible) |
010cf73d PZ |
514 | fbc->visible_pipes_mask |= (1 << pipe); |
515 | else | |
516 | fbc->visible_pipes_mask &= ~(1 << pipe); | |
232fd934 | 517 | |
010cf73d | 518 | return (fbc->visible_pipes_mask & ~(1 << pipe)) != 0; |
232fd934 PZ |
519 | } |
520 | ||
7733b49b | 521 | static int find_compression_threshold(struct drm_i915_private *dev_priv, |
fc786728 PZ |
522 | struct drm_mm_node *node, |
523 | int size, | |
524 | int fb_cpp) | |
525 | { | |
72e96d64 | 526 | struct i915_ggtt *ggtt = &dev_priv->ggtt; |
fc786728 PZ |
527 | int compression_threshold = 1; |
528 | int ret; | |
a9da512b PZ |
529 | u64 end; |
530 | ||
531 | /* The FBC hardware for BDW/SKL doesn't have access to the stolen | |
532 | * reserved range size, so it always assumes the maximum (8mb) is used. | |
533 | * If we enable FBC using a CFB on that memory range we'll get FIFO | |
534 | * underruns, even if that range is not reserved by the BIOS. */ | |
ef11bdb3 RV |
535 | if (IS_BROADWELL(dev_priv) || |
536 | IS_SKYLAKE(dev_priv) || IS_KABYLAKE(dev_priv)) | |
72e96d64 | 537 | end = ggtt->stolen_size - 8 * 1024 * 1024; |
a9da512b | 538 | else |
72e96d64 | 539 | end = ggtt->stolen_usable_size; |
fc786728 PZ |
540 | |
541 | /* HACK: This code depends on what we will do in *_enable_fbc. If that | |
542 | * code changes, this code needs to change as well. | |
543 | * | |
544 | * The enable_fbc code will attempt to use one of our 2 compression | |
545 | * thresholds, therefore, in that case, we only have 1 resort. | |
546 | */ | |
547 | ||
548 | /* Try to over-allocate to reduce reallocations and fragmentation. */ | |
a9da512b PZ |
549 | ret = i915_gem_stolen_insert_node_in_range(dev_priv, node, size <<= 1, |
550 | 4096, 0, end); | |
fc786728 PZ |
551 | if (ret == 0) |
552 | return compression_threshold; | |
553 | ||
554 | again: | |
555 | /* HW's ability to limit the CFB is 1:4 */ | |
556 | if (compression_threshold > 4 || | |
557 | (fb_cpp == 2 && compression_threshold == 2)) | |
558 | return 0; | |
559 | ||
a9da512b PZ |
560 | ret = i915_gem_stolen_insert_node_in_range(dev_priv, node, size >>= 1, |
561 | 4096, 0, end); | |
7733b49b | 562 | if (ret && INTEL_INFO(dev_priv)->gen <= 4) { |
fc786728 PZ |
563 | return 0; |
564 | } else if (ret) { | |
565 | compression_threshold <<= 1; | |
566 | goto again; | |
567 | } else { | |
568 | return compression_threshold; | |
569 | } | |
570 | } | |
571 | ||
c5ecd469 | 572 | static int intel_fbc_alloc_cfb(struct intel_crtc *crtc) |
fc786728 | 573 | { |
fac5e23e | 574 | struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); |
ab34a7e8 | 575 | struct intel_fbc *fbc = &dev_priv->fbc; |
fc786728 | 576 | struct drm_mm_node *uninitialized_var(compressed_llb); |
c5ecd469 PZ |
577 | int size, fb_cpp, ret; |
578 | ||
ab34a7e8 | 579 | WARN_ON(drm_mm_node_allocated(&fbc->compressed_fb)); |
c5ecd469 | 580 | |
aaf78d27 PZ |
581 | size = intel_fbc_calculate_cfb_size(dev_priv, &fbc->state_cache); |
582 | fb_cpp = drm_format_plane_cpp(fbc->state_cache.fb.pixel_format, 0); | |
fc786728 | 583 | |
ab34a7e8 | 584 | ret = find_compression_threshold(dev_priv, &fbc->compressed_fb, |
fc786728 PZ |
585 | size, fb_cpp); |
586 | if (!ret) | |
587 | goto err_llb; | |
588 | else if (ret > 1) { | |
589 | DRM_INFO("Reducing the compressed framebuffer size. This may lead to less power savings than a non-reduced-size. Try to increase stolen memory size if available in BIOS.\n"); | |
590 | ||
591 | } | |
592 | ||
ab34a7e8 | 593 | fbc->threshold = ret; |
fc786728 PZ |
594 | |
595 | if (INTEL_INFO(dev_priv)->gen >= 5) | |
ab34a7e8 | 596 | I915_WRITE(ILK_DPFC_CB_BASE, fbc->compressed_fb.start); |
7733b49b | 597 | else if (IS_GM45(dev_priv)) { |
ab34a7e8 | 598 | I915_WRITE(DPFC_CB_BASE, fbc->compressed_fb.start); |
fc786728 PZ |
599 | } else { |
600 | compressed_llb = kzalloc(sizeof(*compressed_llb), GFP_KERNEL); | |
601 | if (!compressed_llb) | |
602 | goto err_fb; | |
603 | ||
604 | ret = i915_gem_stolen_insert_node(dev_priv, compressed_llb, | |
605 | 4096, 4096); | |
606 | if (ret) | |
607 | goto err_fb; | |
608 | ||
ab34a7e8 | 609 | fbc->compressed_llb = compressed_llb; |
fc786728 PZ |
610 | |
611 | I915_WRITE(FBC_CFB_BASE, | |
ab34a7e8 | 612 | dev_priv->mm.stolen_base + fbc->compressed_fb.start); |
fc786728 PZ |
613 | I915_WRITE(FBC_LL_BASE, |
614 | dev_priv->mm.stolen_base + compressed_llb->start); | |
615 | } | |
616 | ||
b8bf5d7f | 617 | DRM_DEBUG_KMS("reserved %llu bytes of contiguous stolen space for FBC, threshold: %d\n", |
ab34a7e8 | 618 | fbc->compressed_fb.size, fbc->threshold); |
fc786728 PZ |
619 | |
620 | return 0; | |
621 | ||
622 | err_fb: | |
623 | kfree(compressed_llb); | |
ab34a7e8 | 624 | i915_gem_stolen_remove_node(dev_priv, &fbc->compressed_fb); |
fc786728 PZ |
625 | err_llb: |
626 | pr_info_once("drm: not enough stolen space for compressed buffer (need %d more bytes), disabling. Hint: you may be able to increase stolen memory size in the BIOS to avoid this.\n", size); | |
627 | return -ENOSPC; | |
628 | } | |
629 | ||
7733b49b | 630 | static void __intel_fbc_cleanup_cfb(struct drm_i915_private *dev_priv) |
fc786728 | 631 | { |
ab34a7e8 PZ |
632 | struct intel_fbc *fbc = &dev_priv->fbc; |
633 | ||
634 | if (drm_mm_node_allocated(&fbc->compressed_fb)) | |
635 | i915_gem_stolen_remove_node(dev_priv, &fbc->compressed_fb); | |
636 | ||
637 | if (fbc->compressed_llb) { | |
638 | i915_gem_stolen_remove_node(dev_priv, fbc->compressed_llb); | |
639 | kfree(fbc->compressed_llb); | |
fc786728 | 640 | } |
fc786728 PZ |
641 | } |
642 | ||
7733b49b | 643 | void intel_fbc_cleanup_cfb(struct drm_i915_private *dev_priv) |
25ad93fd | 644 | { |
ab34a7e8 PZ |
645 | struct intel_fbc *fbc = &dev_priv->fbc; |
646 | ||
9f218336 | 647 | if (!fbc_supported(dev_priv)) |
0bf73c36 PZ |
648 | return; |
649 | ||
ab34a7e8 | 650 | mutex_lock(&fbc->lock); |
7733b49b | 651 | __intel_fbc_cleanup_cfb(dev_priv); |
ab34a7e8 | 652 | mutex_unlock(&fbc->lock); |
25ad93fd PZ |
653 | } |
654 | ||
adf70c65 PZ |
655 | static bool stride_is_valid(struct drm_i915_private *dev_priv, |
656 | unsigned int stride) | |
657 | { | |
658 | /* These should have been caught earlier. */ | |
659 | WARN_ON(stride < 512); | |
660 | WARN_ON((stride & (64 - 1)) != 0); | |
661 | ||
662 | /* Below are the additional FBC restrictions. */ | |
663 | ||
664 | if (IS_GEN2(dev_priv) || IS_GEN3(dev_priv)) | |
665 | return stride == 4096 || stride == 8192; | |
666 | ||
667 | if (IS_GEN4(dev_priv) && !IS_G4X(dev_priv) && stride < 2048) | |
668 | return false; | |
669 | ||
670 | if (stride > 16384) | |
671 | return false; | |
672 | ||
673 | return true; | |
674 | } | |
675 | ||
aaf78d27 PZ |
676 | static bool pixel_format_is_valid(struct drm_i915_private *dev_priv, |
677 | uint32_t pixel_format) | |
b9e831dc | 678 | { |
aaf78d27 | 679 | switch (pixel_format) { |
b9e831dc PZ |
680 | case DRM_FORMAT_XRGB8888: |
681 | case DRM_FORMAT_XBGR8888: | |
682 | return true; | |
683 | case DRM_FORMAT_XRGB1555: | |
684 | case DRM_FORMAT_RGB565: | |
685 | /* 16bpp not supported on gen2 */ | |
aaf78d27 | 686 | if (IS_GEN2(dev_priv)) |
b9e831dc PZ |
687 | return false; |
688 | /* WaFbcOnly1to1Ratio:ctg */ | |
689 | if (IS_G4X(dev_priv)) | |
690 | return false; | |
691 | return true; | |
692 | default: | |
693 | return false; | |
694 | } | |
695 | } | |
696 | ||
856312ae PZ |
697 | /* |
698 | * For some reason, the hardware tracking starts looking at whatever we | |
699 | * programmed as the display plane base address register. It does not look at | |
700 | * the X and Y offset registers. That's why we look at the crtc->adjusted{x,y} | |
701 | * variables instead of just looking at the pipe/plane size. | |
702 | */ | |
703 | static bool intel_fbc_hw_tracking_covers_screen(struct intel_crtc *crtc) | |
3c5f174e | 704 | { |
fac5e23e | 705 | struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); |
aaf78d27 | 706 | struct intel_fbc *fbc = &dev_priv->fbc; |
856312ae | 707 | unsigned int effective_w, effective_h, max_w, max_h; |
3c5f174e PZ |
708 | |
709 | if (INTEL_INFO(dev_priv)->gen >= 8 || IS_HASWELL(dev_priv)) { | |
710 | max_w = 4096; | |
711 | max_h = 4096; | |
712 | } else if (IS_G4X(dev_priv) || INTEL_INFO(dev_priv)->gen >= 5) { | |
713 | max_w = 4096; | |
714 | max_h = 2048; | |
715 | } else { | |
716 | max_w = 2048; | |
717 | max_h = 1536; | |
718 | } | |
719 | ||
aaf78d27 PZ |
720 | intel_fbc_get_plane_source_size(&fbc->state_cache, &effective_w, |
721 | &effective_h); | |
856312ae PZ |
722 | effective_w += crtc->adjusted_x; |
723 | effective_h += crtc->adjusted_y; | |
724 | ||
725 | return effective_w <= max_w && effective_h <= max_h; | |
3c5f174e PZ |
726 | } |
727 | ||
49ef5294 CW |
728 | /* XXX replace me when we have VMA tracking for intel_plane_state */ |
729 | static int get_fence_id(struct drm_framebuffer *fb) | |
730 | { | |
731 | struct i915_vma *vma = i915_gem_object_to_ggtt(intel_fb_obj(fb), NULL); | |
732 | ||
733 | return vma && vma->fence ? vma->fence->id : I915_FENCE_REG_NONE; | |
734 | } | |
735 | ||
faf68d92 ML |
736 | static void intel_fbc_update_state_cache(struct intel_crtc *crtc, |
737 | struct intel_crtc_state *crtc_state, | |
738 | struct intel_plane_state *plane_state) | |
7ff0ebcc | 739 | { |
fac5e23e | 740 | struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); |
ab34a7e8 | 741 | struct intel_fbc *fbc = &dev_priv->fbc; |
aaf78d27 | 742 | struct intel_fbc_state_cache *cache = &fbc->state_cache; |
aaf78d27 | 743 | struct drm_framebuffer *fb = plane_state->base.fb; |
7ff0ebcc | 744 | struct drm_i915_gem_object *obj; |
7ff0ebcc | 745 | |
aaf78d27 PZ |
746 | cache->crtc.mode_flags = crtc_state->base.adjusted_mode.flags; |
747 | if (IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) | |
748 | cache->crtc.hsw_bdw_pixel_rate = | |
749 | ilk_pipe_pixel_rate(crtc_state); | |
750 | ||
751 | cache->plane.rotation = plane_state->base.rotation; | |
936e71e3 VS |
752 | cache->plane.src_w = drm_rect_width(&plane_state->base.src) >> 16; |
753 | cache->plane.src_h = drm_rect_height(&plane_state->base.src) >> 16; | |
754 | cache->plane.visible = plane_state->base.visible; | |
aaf78d27 PZ |
755 | |
756 | if (!cache->plane.visible) | |
757 | return; | |
7ff0ebcc | 758 | |
7ff0ebcc | 759 | obj = intel_fb_obj(fb); |
615b40d7 | 760 | |
aaf78d27 PZ |
761 | /* FIXME: We lack the proper locking here, so only run this on the |
762 | * platforms that need. */ | |
ac657f64 | 763 | if (IS_GEN(dev_priv, 5, 6)) |
058d88c4 | 764 | cache->fb.ilk_ggtt_offset = i915_gem_object_ggtt_offset(obj, NULL); |
aaf78d27 PZ |
765 | cache->fb.pixel_format = fb->pixel_format; |
766 | cache->fb.stride = fb->pitches[0]; | |
49ef5294 | 767 | cache->fb.fence_reg = get_fence_id(fb); |
3e510a8e | 768 | cache->fb.tiling_mode = i915_gem_object_get_tiling(obj); |
aaf78d27 PZ |
769 | } |
770 | ||
771 | static bool intel_fbc_can_activate(struct intel_crtc *crtc) | |
772 | { | |
fac5e23e | 773 | struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); |
aaf78d27 PZ |
774 | struct intel_fbc *fbc = &dev_priv->fbc; |
775 | struct intel_fbc_state_cache *cache = &fbc->state_cache; | |
776 | ||
777 | if (!cache->plane.visible) { | |
913a3a6a | 778 | fbc->no_fbc_reason = "primary plane not visible"; |
615b40d7 PZ |
779 | return false; |
780 | } | |
7ff0ebcc | 781 | |
aaf78d27 PZ |
782 | if ((cache->crtc.mode_flags & DRM_MODE_FLAG_INTERLACE) || |
783 | (cache->crtc.mode_flags & DRM_MODE_FLAG_DBLSCAN)) { | |
913a3a6a | 784 | fbc->no_fbc_reason = "incompatible mode"; |
615b40d7 | 785 | return false; |
7ff0ebcc RV |
786 | } |
787 | ||
45b32a29 | 788 | if (!intel_fbc_hw_tracking_covers_screen(crtc)) { |
913a3a6a | 789 | fbc->no_fbc_reason = "mode too large for compression"; |
615b40d7 | 790 | return false; |
7ff0ebcc | 791 | } |
3c5f174e | 792 | |
7ff0ebcc RV |
793 | /* The use of a CPU fence is mandatory in order to detect writes |
794 | * by the CPU to the scanout and trigger updates to the FBC. | |
2efb813d CW |
795 | * |
796 | * Note that is possible for a tiled surface to be unmappable (and | |
797 | * so have no fence associated with it) due to aperture constaints | |
798 | * at the time of pinning. | |
7ff0ebcc | 799 | */ |
aaf78d27 PZ |
800 | if (cache->fb.tiling_mode != I915_TILING_X || |
801 | cache->fb.fence_reg == I915_FENCE_REG_NONE) { | |
c82dd884 CW |
802 | fbc->no_fbc_reason = "framebuffer not tiled or fenced"; |
803 | return false; | |
7ff0ebcc | 804 | } |
7733b49b | 805 | if (INTEL_INFO(dev_priv)->gen <= 4 && !IS_G4X(dev_priv) && |
31ad61e4 | 806 | cache->plane.rotation != DRM_ROTATE_0) { |
913a3a6a | 807 | fbc->no_fbc_reason = "rotation unsupported"; |
615b40d7 | 808 | return false; |
7ff0ebcc RV |
809 | } |
810 | ||
aaf78d27 | 811 | if (!stride_is_valid(dev_priv, cache->fb.stride)) { |
913a3a6a | 812 | fbc->no_fbc_reason = "framebuffer stride not supported"; |
615b40d7 | 813 | return false; |
adf70c65 PZ |
814 | } |
815 | ||
aaf78d27 | 816 | if (!pixel_format_is_valid(dev_priv, cache->fb.pixel_format)) { |
913a3a6a | 817 | fbc->no_fbc_reason = "pixel format is invalid"; |
615b40d7 | 818 | return false; |
b9e831dc PZ |
819 | } |
820 | ||
7b24c9a6 PZ |
821 | /* WaFbcExceedCdClockThreshold:hsw,bdw */ |
822 | if ((IS_HASWELL(dev_priv) || IS_BROADWELL(dev_priv)) && | |
aaf78d27 | 823 | cache->crtc.hsw_bdw_pixel_rate >= dev_priv->cdclk_freq * 95 / 100) { |
913a3a6a | 824 | fbc->no_fbc_reason = "pixel rate is too big"; |
615b40d7 | 825 | return false; |
7b24c9a6 PZ |
826 | } |
827 | ||
c5ecd469 PZ |
828 | /* It is possible for the required CFB size change without a |
829 | * crtc->disable + crtc->enable since it is possible to change the | |
830 | * stride without triggering a full modeset. Since we try to | |
831 | * over-allocate the CFB, there's a chance we may keep FBC enabled even | |
832 | * if this happens, but if we exceed the current CFB size we'll have to | |
833 | * disable FBC. Notice that it would be possible to disable FBC, wait | |
834 | * for a frame, free the stolen node, then try to reenable FBC in case | |
835 | * we didn't get any invalidate/deactivate calls, but this would require | |
836 | * a lot of tracking just for a specific case. If we conclude it's an | |
837 | * important case, we can implement it later. */ | |
aaf78d27 | 838 | if (intel_fbc_calculate_cfb_size(dev_priv, &fbc->state_cache) > |
ab34a7e8 | 839 | fbc->compressed_fb.size * fbc->threshold) { |
913a3a6a | 840 | fbc->no_fbc_reason = "CFB requirements changed"; |
615b40d7 PZ |
841 | return false; |
842 | } | |
843 | ||
844 | return true; | |
845 | } | |
846 | ||
f51be2e0 | 847 | static bool intel_fbc_can_choose(struct intel_crtc *crtc) |
44a8a257 | 848 | { |
fac5e23e | 849 | struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); |
913a3a6a | 850 | struct intel_fbc *fbc = &dev_priv->fbc; |
44a8a257 | 851 | |
c033666a | 852 | if (intel_vgpu_active(dev_priv)) { |
913a3a6a | 853 | fbc->no_fbc_reason = "VGPU is active"; |
44a8a257 PZ |
854 | return false; |
855 | } | |
856 | ||
44a8a257 | 857 | if (!i915.enable_fbc) { |
80788a0f | 858 | fbc->no_fbc_reason = "disabled per module param or by default"; |
44a8a257 PZ |
859 | return false; |
860 | } | |
861 | ||
e35be23f | 862 | if (fbc_on_pipe_a_only(dev_priv) && crtc->pipe != PIPE_A) { |
913a3a6a | 863 | fbc->no_fbc_reason = "no enabled pipes can have FBC"; |
44a8a257 PZ |
864 | return false; |
865 | } | |
866 | ||
e35be23f PZ |
867 | if (fbc_on_plane_a_only(dev_priv) && crtc->plane != PLANE_A) { |
868 | fbc->no_fbc_reason = "no enabled planes can have FBC"; | |
869 | return false; | |
870 | } | |
871 | ||
44a8a257 PZ |
872 | return true; |
873 | } | |
874 | ||
b183b3f1 PZ |
875 | static void intel_fbc_get_reg_params(struct intel_crtc *crtc, |
876 | struct intel_fbc_reg_params *params) | |
877 | { | |
fac5e23e | 878 | struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); |
aaf78d27 PZ |
879 | struct intel_fbc *fbc = &dev_priv->fbc; |
880 | struct intel_fbc_state_cache *cache = &fbc->state_cache; | |
b183b3f1 PZ |
881 | |
882 | /* Since all our fields are integer types, use memset here so the | |
883 | * comparison function can rely on memcmp because the padding will be | |
884 | * zero. */ | |
885 | memset(params, 0, sizeof(*params)); | |
886 | ||
887 | params->crtc.pipe = crtc->pipe; | |
888 | params->crtc.plane = crtc->plane; | |
889 | params->crtc.fence_y_offset = get_crtc_fence_y_offset(crtc); | |
890 | ||
aaf78d27 PZ |
891 | params->fb.pixel_format = cache->fb.pixel_format; |
892 | params->fb.stride = cache->fb.stride; | |
893 | params->fb.fence_reg = cache->fb.fence_reg; | |
b183b3f1 | 894 | |
aaf78d27 | 895 | params->cfb_size = intel_fbc_calculate_cfb_size(dev_priv, cache); |
b183b3f1 | 896 | |
aaf78d27 | 897 | params->fb.ggtt_offset = cache->fb.ilk_ggtt_offset; |
b183b3f1 PZ |
898 | } |
899 | ||
900 | static bool intel_fbc_reg_params_equal(struct intel_fbc_reg_params *params1, | |
901 | struct intel_fbc_reg_params *params2) | |
902 | { | |
903 | /* We can use this since intel_fbc_get_reg_params() does a memset. */ | |
904 | return memcmp(params1, params2, sizeof(*params1)) == 0; | |
905 | } | |
906 | ||
faf68d92 ML |
907 | void intel_fbc_pre_update(struct intel_crtc *crtc, |
908 | struct intel_crtc_state *crtc_state, | |
909 | struct intel_plane_state *plane_state) | |
615b40d7 | 910 | { |
fac5e23e | 911 | struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); |
ab34a7e8 | 912 | struct intel_fbc *fbc = &dev_priv->fbc; |
615b40d7 | 913 | |
1eb52238 PZ |
914 | if (!fbc_supported(dev_priv)) |
915 | return; | |
916 | ||
917 | mutex_lock(&fbc->lock); | |
615b40d7 | 918 | |
faf68d92 | 919 | if (!multiple_pipes_ok(crtc, plane_state)) { |
913a3a6a | 920 | fbc->no_fbc_reason = "more than one pipe active"; |
212890cf | 921 | goto deactivate; |
7ff0ebcc RV |
922 | } |
923 | ||
ab34a7e8 | 924 | if (!fbc->enabled || fbc->crtc != crtc) |
1eb52238 | 925 | goto unlock; |
615b40d7 | 926 | |
faf68d92 | 927 | intel_fbc_update_state_cache(crtc, crtc_state, plane_state); |
aaf78d27 | 928 | |
212890cf | 929 | deactivate: |
60eb2cc7 | 930 | intel_fbc_deactivate(dev_priv); |
1eb52238 PZ |
931 | unlock: |
932 | mutex_unlock(&fbc->lock); | |
212890cf PZ |
933 | } |
934 | ||
1eb52238 | 935 | static void __intel_fbc_post_update(struct intel_crtc *crtc) |
212890cf | 936 | { |
fac5e23e | 937 | struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); |
212890cf PZ |
938 | struct intel_fbc *fbc = &dev_priv->fbc; |
939 | struct intel_fbc_reg_params old_params; | |
940 | ||
941 | WARN_ON(!mutex_is_locked(&fbc->lock)); | |
942 | ||
943 | if (!fbc->enabled || fbc->crtc != crtc) | |
944 | return; | |
945 | ||
946 | if (!intel_fbc_can_activate(crtc)) { | |
947 | WARN_ON(fbc->active); | |
948 | return; | |
949 | } | |
615b40d7 | 950 | |
ab34a7e8 PZ |
951 | old_params = fbc->params; |
952 | intel_fbc_get_reg_params(crtc, &fbc->params); | |
b183b3f1 | 953 | |
7ff0ebcc RV |
954 | /* If the scanout has not changed, don't modify the FBC settings. |
955 | * Note that we make the fundamental assumption that the fb->obj | |
956 | * cannot be unpinned (and have its GTT offset and fence revoked) | |
957 | * without first being decoupled from the scanout and FBC disabled. | |
958 | */ | |
ab34a7e8 PZ |
959 | if (fbc->active && |
960 | intel_fbc_reg_params_equal(&old_params, &fbc->params)) | |
7ff0ebcc RV |
961 | return; |
962 | ||
60eb2cc7 | 963 | intel_fbc_deactivate(dev_priv); |
0e631adc | 964 | intel_fbc_schedule_activation(crtc); |
212890cf | 965 | fbc->no_fbc_reason = "FBC enabled (active or scheduled)"; |
25ad93fd PZ |
966 | } |
967 | ||
1eb52238 | 968 | void intel_fbc_post_update(struct intel_crtc *crtc) |
25ad93fd | 969 | { |
fac5e23e | 970 | struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); |
ab34a7e8 | 971 | struct intel_fbc *fbc = &dev_priv->fbc; |
754d1133 | 972 | |
9f218336 | 973 | if (!fbc_supported(dev_priv)) |
0bf73c36 PZ |
974 | return; |
975 | ||
ab34a7e8 | 976 | mutex_lock(&fbc->lock); |
1eb52238 | 977 | __intel_fbc_post_update(crtc); |
ab34a7e8 | 978 | mutex_unlock(&fbc->lock); |
7ff0ebcc RV |
979 | } |
980 | ||
261fe99a PZ |
981 | static unsigned int intel_fbc_get_frontbuffer_bit(struct intel_fbc *fbc) |
982 | { | |
983 | if (fbc->enabled) | |
984 | return to_intel_plane(fbc->crtc->base.primary)->frontbuffer_bit; | |
985 | else | |
986 | return fbc->possible_framebuffer_bits; | |
987 | } | |
988 | ||
dbef0f15 PZ |
989 | void intel_fbc_invalidate(struct drm_i915_private *dev_priv, |
990 | unsigned int frontbuffer_bits, | |
991 | enum fb_op_origin origin) | |
992 | { | |
ab34a7e8 | 993 | struct intel_fbc *fbc = &dev_priv->fbc; |
dbef0f15 | 994 | |
9f218336 | 995 | if (!fbc_supported(dev_priv)) |
0bf73c36 PZ |
996 | return; |
997 | ||
0dd81544 | 998 | if (origin == ORIGIN_GTT || origin == ORIGIN_FLIP) |
dbef0f15 PZ |
999 | return; |
1000 | ||
ab34a7e8 | 1001 | mutex_lock(&fbc->lock); |
25ad93fd | 1002 | |
261fe99a | 1003 | fbc->busy_bits |= intel_fbc_get_frontbuffer_bit(fbc) & frontbuffer_bits; |
dbef0f15 | 1004 | |
5bc40472 | 1005 | if (fbc->enabled && fbc->busy_bits) |
60eb2cc7 | 1006 | intel_fbc_deactivate(dev_priv); |
25ad93fd | 1007 | |
ab34a7e8 | 1008 | mutex_unlock(&fbc->lock); |
dbef0f15 PZ |
1009 | } |
1010 | ||
1011 | void intel_fbc_flush(struct drm_i915_private *dev_priv, | |
6f4551fe | 1012 | unsigned int frontbuffer_bits, enum fb_op_origin origin) |
dbef0f15 | 1013 | { |
ab34a7e8 PZ |
1014 | struct intel_fbc *fbc = &dev_priv->fbc; |
1015 | ||
9f218336 | 1016 | if (!fbc_supported(dev_priv)) |
0bf73c36 PZ |
1017 | return; |
1018 | ||
ab34a7e8 | 1019 | mutex_lock(&fbc->lock); |
dbef0f15 | 1020 | |
ab34a7e8 | 1021 | fbc->busy_bits &= ~frontbuffer_bits; |
dbef0f15 | 1022 | |
ab28a547 PZ |
1023 | if (origin == ORIGIN_GTT || origin == ORIGIN_FLIP) |
1024 | goto out; | |
1025 | ||
261fe99a PZ |
1026 | if (!fbc->busy_bits && fbc->enabled && |
1027 | (frontbuffer_bits & intel_fbc_get_frontbuffer_bit(fbc))) { | |
0dd81544 | 1028 | if (fbc->active) |
ee7d6cfa | 1029 | intel_fbc_recompress(dev_priv); |
0dd81544 | 1030 | else |
1eb52238 | 1031 | __intel_fbc_post_update(fbc->crtc); |
6f4551fe | 1032 | } |
25ad93fd | 1033 | |
ab28a547 | 1034 | out: |
ab34a7e8 | 1035 | mutex_unlock(&fbc->lock); |
dbef0f15 PZ |
1036 | } |
1037 | ||
f51be2e0 PZ |
1038 | /** |
1039 | * intel_fbc_choose_crtc - select a CRTC to enable FBC on | |
1040 | * @dev_priv: i915 device instance | |
1041 | * @state: the atomic state structure | |
1042 | * | |
1043 | * This function looks at the proposed state for CRTCs and planes, then chooses | |
1044 | * which pipe is going to have FBC by setting intel_crtc_state->enable_fbc to | |
1045 | * true. | |
1046 | * | |
1047 | * Later, intel_fbc_enable is going to look for state->enable_fbc and then maybe | |
1048 | * enable FBC for the chosen CRTC. If it does, it will set dev_priv->fbc.crtc. | |
1049 | */ | |
1050 | void intel_fbc_choose_crtc(struct drm_i915_private *dev_priv, | |
1051 | struct drm_atomic_state *state) | |
1052 | { | |
1053 | struct intel_fbc *fbc = &dev_priv->fbc; | |
1054 | struct drm_crtc *crtc; | |
1055 | struct drm_crtc_state *crtc_state; | |
1056 | struct drm_plane *plane; | |
1057 | struct drm_plane_state *plane_state; | |
1058 | bool fbc_crtc_present = false; | |
1059 | int i, j; | |
1060 | ||
1061 | mutex_lock(&fbc->lock); | |
1062 | ||
1063 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1064 | if (fbc->crtc == to_intel_crtc(crtc)) { | |
1065 | fbc_crtc_present = true; | |
1066 | break; | |
1067 | } | |
1068 | } | |
1069 | /* This atomic commit doesn't involve the CRTC currently tied to FBC. */ | |
1070 | if (!fbc_crtc_present && fbc->crtc != NULL) | |
1071 | goto out; | |
1072 | ||
1073 | /* Simply choose the first CRTC that is compatible and has a visible | |
1074 | * plane. We could go for fancier schemes such as checking the plane | |
1075 | * size, but this would just affect the few platforms that don't tie FBC | |
1076 | * to pipe or plane A. */ | |
1077 | for_each_plane_in_state(state, plane, plane_state, i) { | |
1078 | struct intel_plane_state *intel_plane_state = | |
1079 | to_intel_plane_state(plane_state); | |
1080 | ||
936e71e3 | 1081 | if (!intel_plane_state->base.visible) |
f51be2e0 PZ |
1082 | continue; |
1083 | ||
1084 | for_each_crtc_in_state(state, crtc, crtc_state, j) { | |
1085 | struct intel_crtc_state *intel_crtc_state = | |
1086 | to_intel_crtc_state(crtc_state); | |
1087 | ||
1088 | if (plane_state->crtc != crtc) | |
1089 | continue; | |
1090 | ||
1091 | if (!intel_fbc_can_choose(to_intel_crtc(crtc))) | |
1092 | break; | |
1093 | ||
1094 | intel_crtc_state->enable_fbc = true; | |
1095 | goto out; | |
1096 | } | |
1097 | } | |
1098 | ||
1099 | out: | |
1100 | mutex_unlock(&fbc->lock); | |
1101 | } | |
1102 | ||
d029bcad PZ |
1103 | /** |
1104 | * intel_fbc_enable: tries to enable FBC on the CRTC | |
1105 | * @crtc: the CRTC | |
62f90b38 DV |
1106 | * @crtc_state: corresponding &drm_crtc_state for @crtc |
1107 | * @plane_state: corresponding &drm_plane_state for the primary plane of @crtc | |
d029bcad | 1108 | * |
f51be2e0 | 1109 | * This function checks if the given CRTC was chosen for FBC, then enables it if |
49227c4a PZ |
1110 | * possible. Notice that it doesn't activate FBC. It is valid to call |
1111 | * intel_fbc_enable multiple times for the same pipe without an | |
1112 | * intel_fbc_disable in the middle, as long as it is deactivated. | |
d029bcad | 1113 | */ |
faf68d92 ML |
1114 | void intel_fbc_enable(struct intel_crtc *crtc, |
1115 | struct intel_crtc_state *crtc_state, | |
1116 | struct intel_plane_state *plane_state) | |
d029bcad | 1117 | { |
fac5e23e | 1118 | struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); |
ab34a7e8 | 1119 | struct intel_fbc *fbc = &dev_priv->fbc; |
d029bcad PZ |
1120 | |
1121 | if (!fbc_supported(dev_priv)) | |
1122 | return; | |
1123 | ||
ab34a7e8 | 1124 | mutex_lock(&fbc->lock); |
d029bcad | 1125 | |
ab34a7e8 | 1126 | if (fbc->enabled) { |
49227c4a PZ |
1127 | WARN_ON(fbc->crtc == NULL); |
1128 | if (fbc->crtc == crtc) { | |
faf68d92 | 1129 | WARN_ON(!crtc_state->enable_fbc); |
49227c4a PZ |
1130 | WARN_ON(fbc->active); |
1131 | } | |
d029bcad PZ |
1132 | goto out; |
1133 | } | |
1134 | ||
faf68d92 | 1135 | if (!crtc_state->enable_fbc) |
f51be2e0 PZ |
1136 | goto out; |
1137 | ||
ab34a7e8 PZ |
1138 | WARN_ON(fbc->active); |
1139 | WARN_ON(fbc->crtc != NULL); | |
d029bcad | 1140 | |
faf68d92 | 1141 | intel_fbc_update_state_cache(crtc, crtc_state, plane_state); |
c5ecd469 | 1142 | if (intel_fbc_alloc_cfb(crtc)) { |
913a3a6a | 1143 | fbc->no_fbc_reason = "not enough stolen memory"; |
c5ecd469 PZ |
1144 | goto out; |
1145 | } | |
1146 | ||
d029bcad | 1147 | DRM_DEBUG_KMS("Enabling FBC on pipe %c\n", pipe_name(crtc->pipe)); |
ab34a7e8 | 1148 | fbc->no_fbc_reason = "FBC enabled but not active yet\n"; |
d029bcad | 1149 | |
ab34a7e8 PZ |
1150 | fbc->enabled = true; |
1151 | fbc->crtc = crtc; | |
d029bcad | 1152 | out: |
ab34a7e8 | 1153 | mutex_unlock(&fbc->lock); |
d029bcad PZ |
1154 | } |
1155 | ||
1156 | /** | |
1157 | * __intel_fbc_disable - disable FBC | |
1158 | * @dev_priv: i915 device instance | |
1159 | * | |
1160 | * This is the low level function that actually disables FBC. Callers should | |
1161 | * grab the FBC lock. | |
1162 | */ | |
1163 | static void __intel_fbc_disable(struct drm_i915_private *dev_priv) | |
1164 | { | |
ab34a7e8 PZ |
1165 | struct intel_fbc *fbc = &dev_priv->fbc; |
1166 | struct intel_crtc *crtc = fbc->crtc; | |
d029bcad | 1167 | |
ab34a7e8 PZ |
1168 | WARN_ON(!mutex_is_locked(&fbc->lock)); |
1169 | WARN_ON(!fbc->enabled); | |
1170 | WARN_ON(fbc->active); | |
58f9c0bc | 1171 | WARN_ON(crtc->active); |
d029bcad PZ |
1172 | |
1173 | DRM_DEBUG_KMS("Disabling FBC on pipe %c\n", pipe_name(crtc->pipe)); | |
1174 | ||
c5ecd469 PZ |
1175 | __intel_fbc_cleanup_cfb(dev_priv); |
1176 | ||
ab34a7e8 PZ |
1177 | fbc->enabled = false; |
1178 | fbc->crtc = NULL; | |
d029bcad PZ |
1179 | } |
1180 | ||
1181 | /** | |
c937ab3e | 1182 | * intel_fbc_disable - disable FBC if it's associated with crtc |
d029bcad PZ |
1183 | * @crtc: the CRTC |
1184 | * | |
1185 | * This function disables FBC if it's associated with the provided CRTC. | |
1186 | */ | |
c937ab3e | 1187 | void intel_fbc_disable(struct intel_crtc *crtc) |
d029bcad | 1188 | { |
fac5e23e | 1189 | struct drm_i915_private *dev_priv = to_i915(crtc->base.dev); |
ab34a7e8 | 1190 | struct intel_fbc *fbc = &dev_priv->fbc; |
d029bcad PZ |
1191 | |
1192 | if (!fbc_supported(dev_priv)) | |
1193 | return; | |
1194 | ||
ab34a7e8 | 1195 | mutex_lock(&fbc->lock); |
4da45616 | 1196 | if (fbc->crtc == crtc) |
d029bcad | 1197 | __intel_fbc_disable(dev_priv); |
ab34a7e8 | 1198 | mutex_unlock(&fbc->lock); |
65c7600f PZ |
1199 | |
1200 | cancel_work_sync(&fbc->work.work); | |
d029bcad PZ |
1201 | } |
1202 | ||
1203 | /** | |
c937ab3e | 1204 | * intel_fbc_global_disable - globally disable FBC |
d029bcad PZ |
1205 | * @dev_priv: i915 device instance |
1206 | * | |
1207 | * This function disables FBC regardless of which CRTC is associated with it. | |
1208 | */ | |
c937ab3e | 1209 | void intel_fbc_global_disable(struct drm_i915_private *dev_priv) |
d029bcad | 1210 | { |
ab34a7e8 PZ |
1211 | struct intel_fbc *fbc = &dev_priv->fbc; |
1212 | ||
d029bcad PZ |
1213 | if (!fbc_supported(dev_priv)) |
1214 | return; | |
1215 | ||
ab34a7e8 PZ |
1216 | mutex_lock(&fbc->lock); |
1217 | if (fbc->enabled) | |
d029bcad | 1218 | __intel_fbc_disable(dev_priv); |
ab34a7e8 | 1219 | mutex_unlock(&fbc->lock); |
65c7600f PZ |
1220 | |
1221 | cancel_work_sync(&fbc->work.work); | |
d029bcad PZ |
1222 | } |
1223 | ||
010cf73d PZ |
1224 | /** |
1225 | * intel_fbc_init_pipe_state - initialize FBC's CRTC visibility tracking | |
1226 | * @dev_priv: i915 device instance | |
1227 | * | |
1228 | * The FBC code needs to track CRTC visibility since the older platforms can't | |
1229 | * have FBC enabled while multiple pipes are used. This function does the | |
1230 | * initial setup at driver load to make sure FBC is matching the real hardware. | |
1231 | */ | |
1232 | void intel_fbc_init_pipe_state(struct drm_i915_private *dev_priv) | |
1233 | { | |
1234 | struct intel_crtc *crtc; | |
1235 | ||
1236 | /* Don't even bother tracking anything if we don't need. */ | |
1237 | if (!no_fbc_on_multiple_pipes(dev_priv)) | |
1238 | return; | |
1239 | ||
91c8a326 | 1240 | for_each_intel_crtc(&dev_priv->drm, crtc) |
010cf73d | 1241 | if (intel_crtc_active(&crtc->base) && |
936e71e3 | 1242 | to_intel_plane_state(crtc->base.primary->state)->base.visible) |
010cf73d PZ |
1243 | dev_priv->fbc.visible_pipes_mask |= (1 << crtc->pipe); |
1244 | } | |
1245 | ||
80788a0f PZ |
1246 | /* |
1247 | * The DDX driver changes its behavior depending on the value it reads from | |
1248 | * i915.enable_fbc, so sanitize it by translating the default value into either | |
1249 | * 0 or 1 in order to allow it to know what's going on. | |
1250 | * | |
1251 | * Notice that this is done at driver initialization and we still allow user | |
1252 | * space to change the value during runtime without sanitizing it again. IGT | |
1253 | * relies on being able to change i915.enable_fbc at runtime. | |
1254 | */ | |
1255 | static int intel_sanitize_fbc_option(struct drm_i915_private *dev_priv) | |
1256 | { | |
1257 | if (i915.enable_fbc >= 0) | |
1258 | return !!i915.enable_fbc; | |
1259 | ||
36dbc4d7 CW |
1260 | if (!HAS_FBC(dev_priv)) |
1261 | return 0; | |
1262 | ||
80788a0f PZ |
1263 | if (IS_BROADWELL(dev_priv)) |
1264 | return 1; | |
1265 | ||
1266 | return 0; | |
1267 | } | |
1268 | ||
36dbc4d7 CW |
1269 | static bool need_fbc_vtd_wa(struct drm_i915_private *dev_priv) |
1270 | { | |
1271 | #ifdef CONFIG_INTEL_IOMMU | |
1272 | /* WaFbcTurnOffFbcWhenHyperVisorIsUsed:skl,bxt */ | |
1273 | if (intel_iommu_gfx_mapped && | |
1274 | (IS_SKYLAKE(dev_priv) || IS_BROXTON(dev_priv))) { | |
1275 | DRM_INFO("Disabling framebuffer compression (FBC) to prevent screen flicker with VT-d enabled\n"); | |
1276 | return true; | |
1277 | } | |
1278 | #endif | |
1279 | ||
1280 | return false; | |
1281 | } | |
1282 | ||
94b83957 RV |
1283 | /** |
1284 | * intel_fbc_init - Initialize FBC | |
1285 | * @dev_priv: the i915 device | |
1286 | * | |
1287 | * This function might be called during PM init process. | |
1288 | */ | |
7ff0ebcc RV |
1289 | void intel_fbc_init(struct drm_i915_private *dev_priv) |
1290 | { | |
ab34a7e8 | 1291 | struct intel_fbc *fbc = &dev_priv->fbc; |
dbef0f15 PZ |
1292 | enum pipe pipe; |
1293 | ||
ab34a7e8 PZ |
1294 | INIT_WORK(&fbc->work.work, intel_fbc_work_fn); |
1295 | mutex_init(&fbc->lock); | |
1296 | fbc->enabled = false; | |
1297 | fbc->active = false; | |
1298 | fbc->work.scheduled = false; | |
25ad93fd | 1299 | |
36dbc4d7 CW |
1300 | if (need_fbc_vtd_wa(dev_priv)) |
1301 | mkwrite_device_info(dev_priv)->has_fbc = false; | |
1302 | ||
80788a0f PZ |
1303 | i915.enable_fbc = intel_sanitize_fbc_option(dev_priv); |
1304 | DRM_DEBUG_KMS("Sanitized enable_fbc value: %d\n", i915.enable_fbc); | |
1305 | ||
7ff0ebcc | 1306 | if (!HAS_FBC(dev_priv)) { |
ab34a7e8 | 1307 | fbc->no_fbc_reason = "unsupported by this chipset"; |
7ff0ebcc RV |
1308 | return; |
1309 | } | |
1310 | ||
dbef0f15 | 1311 | for_each_pipe(dev_priv, pipe) { |
ab34a7e8 | 1312 | fbc->possible_framebuffer_bits |= |
dbef0f15 PZ |
1313 | INTEL_FRONTBUFFER_PRIMARY(pipe); |
1314 | ||
57105022 | 1315 | if (fbc_on_pipe_a_only(dev_priv)) |
dbef0f15 PZ |
1316 | break; |
1317 | } | |
1318 | ||
8c40074c PZ |
1319 | /* This value was pulled out of someone's hat */ |
1320 | if (INTEL_INFO(dev_priv)->gen <= 4 && !IS_GM45(dev_priv)) | |
7ff0ebcc | 1321 | I915_WRITE(FBC_CONTROL, 500 << FBC_CTL_INTERVAL_SHIFT); |
7ff0ebcc | 1322 | |
b07ea0fa | 1323 | /* We still don't have any sort of hardware state readout for FBC, so |
0e631adc PZ |
1324 | * deactivate it in case the BIOS activated it to make sure software |
1325 | * matches the hardware state. */ | |
8c40074c PZ |
1326 | if (intel_fbc_hw_is_active(dev_priv)) |
1327 | intel_fbc_hw_deactivate(dev_priv); | |
7ff0ebcc | 1328 | } |