Commit | Line | Data |
---|---|---|
4bf8e196 LP |
1 | /* |
2 | * rcar_du_crtc.c -- R-Car Display Unit CRTCs | |
3 | * | |
36d50464 | 4 | * Copyright (C) 2013-2014 Renesas Electronics Corporation |
4bf8e196 LP |
5 | * |
6 | * Contact: Laurent Pinchart (laurent.pinchart@ideasonboard.com) | |
7 | * | |
8 | * This program is free software; you can redistribute it and/or modify | |
9 | * it under the terms of the GNU General Public License as published by | |
10 | * the Free Software Foundation; either version 2 of the License, or | |
11 | * (at your option) any later version. | |
12 | */ | |
13 | ||
14 | #include <linux/clk.h> | |
15 | #include <linux/mutex.h> | |
16 | ||
17 | #include <drm/drmP.h> | |
3e8da87d LP |
18 | #include <drm/drm_atomic.h> |
19 | #include <drm/drm_atomic_helper.h> | |
4bf8e196 LP |
20 | #include <drm/drm_crtc.h> |
21 | #include <drm/drm_crtc_helper.h> | |
22 | #include <drm/drm_fb_cma_helper.h> | |
23 | #include <drm/drm_gem_cma_helper.h> | |
3cb9ae4f | 24 | #include <drm/drm_plane_helper.h> |
4bf8e196 LP |
25 | |
26 | #include "rcar_du_crtc.h" | |
27 | #include "rcar_du_drv.h" | |
28 | #include "rcar_du_kms.h" | |
4bf8e196 LP |
29 | #include "rcar_du_plane.h" |
30 | #include "rcar_du_regs.h" | |
4bf8e196 | 31 | |
4bf8e196 LP |
32 | static u32 rcar_du_crtc_read(struct rcar_du_crtc *rcrtc, u32 reg) |
33 | { | |
cb2025d2 | 34 | struct rcar_du_device *rcdu = rcrtc->group->dev; |
4bf8e196 LP |
35 | |
36 | return rcar_du_read(rcdu, rcrtc->mmio_offset + reg); | |
37 | } | |
38 | ||
39 | static void rcar_du_crtc_write(struct rcar_du_crtc *rcrtc, u32 reg, u32 data) | |
40 | { | |
cb2025d2 | 41 | struct rcar_du_device *rcdu = rcrtc->group->dev; |
4bf8e196 LP |
42 | |
43 | rcar_du_write(rcdu, rcrtc->mmio_offset + reg, data); | |
44 | } | |
45 | ||
46 | static void rcar_du_crtc_clr(struct rcar_du_crtc *rcrtc, u32 reg, u32 clr) | |
47 | { | |
cb2025d2 | 48 | struct rcar_du_device *rcdu = rcrtc->group->dev; |
4bf8e196 LP |
49 | |
50 | rcar_du_write(rcdu, rcrtc->mmio_offset + reg, | |
51 | rcar_du_read(rcdu, rcrtc->mmio_offset + reg) & ~clr); | |
52 | } | |
53 | ||
54 | static void rcar_du_crtc_set(struct rcar_du_crtc *rcrtc, u32 reg, u32 set) | |
55 | { | |
cb2025d2 | 56 | struct rcar_du_device *rcdu = rcrtc->group->dev; |
4bf8e196 LP |
57 | |
58 | rcar_du_write(rcdu, rcrtc->mmio_offset + reg, | |
59 | rcar_du_read(rcdu, rcrtc->mmio_offset + reg) | set); | |
60 | } | |
61 | ||
62 | static void rcar_du_crtc_clr_set(struct rcar_du_crtc *rcrtc, u32 reg, | |
63 | u32 clr, u32 set) | |
64 | { | |
cb2025d2 | 65 | struct rcar_du_device *rcdu = rcrtc->group->dev; |
4bf8e196 LP |
66 | u32 value = rcar_du_read(rcdu, rcrtc->mmio_offset + reg); |
67 | ||
68 | rcar_du_write(rcdu, rcrtc->mmio_offset + reg, (value & ~clr) | set); | |
69 | } | |
70 | ||
f66ee304 LP |
71 | static int rcar_du_crtc_get(struct rcar_du_crtc *rcrtc) |
72 | { | |
f66ee304 LP |
73 | int ret; |
74 | ||
75 | ret = clk_prepare_enable(rcrtc->clock); | |
76 | if (ret < 0) | |
77 | return ret; | |
78 | ||
1b30dbde LP |
79 | ret = clk_prepare_enable(rcrtc->extclock); |
80 | if (ret < 0) | |
81 | goto error_clock; | |
82 | ||
cb2025d2 | 83 | ret = rcar_du_group_get(rcrtc->group); |
f66ee304 | 84 | if (ret < 0) |
1b30dbde LP |
85 | goto error_group; |
86 | ||
87 | return 0; | |
f66ee304 | 88 | |
1b30dbde LP |
89 | error_group: |
90 | clk_disable_unprepare(rcrtc->extclock); | |
91 | error_clock: | |
92 | clk_disable_unprepare(rcrtc->clock); | |
f66ee304 LP |
93 | return ret; |
94 | } | |
95 | ||
96 | static void rcar_du_crtc_put(struct rcar_du_crtc *rcrtc) | |
97 | { | |
cb2025d2 | 98 | rcar_du_group_put(rcrtc->group); |
1b30dbde LP |
99 | |
100 | clk_disable_unprepare(rcrtc->extclock); | |
f66ee304 LP |
101 | clk_disable_unprepare(rcrtc->clock); |
102 | } | |
103 | ||
17f6b8a0 LP |
104 | /* ----------------------------------------------------------------------------- |
105 | * Hardware Setup | |
106 | */ | |
107 | ||
4bf8e196 LP |
108 | static void rcar_du_crtc_set_display_timing(struct rcar_du_crtc *rcrtc) |
109 | { | |
845f4635 | 110 | const struct drm_display_mode *mode = &rcrtc->crtc.state->adjusted_mode; |
1b30dbde | 111 | unsigned long mode_clock = mode->clock * 1000; |
4bf8e196 LP |
112 | unsigned long clk; |
113 | u32 value; | |
1b30dbde | 114 | u32 escr; |
4bf8e196 LP |
115 | u32 div; |
116 | ||
1b30dbde LP |
117 | /* Compute the clock divisor and select the internal or external dot |
118 | * clock based on the requested frequency. | |
119 | */ | |
f66ee304 | 120 | clk = clk_get_rate(rcrtc->clock); |
1b30dbde | 121 | div = DIV_ROUND_CLOSEST(clk, mode_clock); |
4bf8e196 | 122 | div = clamp(div, 1U, 64U) - 1; |
1b30dbde LP |
123 | escr = div | ESCR_DCLKSEL_CLKS; |
124 | ||
125 | if (rcrtc->extclock) { | |
126 | unsigned long extclk; | |
127 | unsigned long extrate; | |
128 | unsigned long rate; | |
129 | u32 extdiv; | |
130 | ||
131 | extclk = clk_get_rate(rcrtc->extclock); | |
132 | extdiv = DIV_ROUND_CLOSEST(extclk, mode_clock); | |
133 | extdiv = clamp(extdiv, 1U, 64U) - 1; | |
134 | ||
135 | rate = clk / (div + 1); | |
136 | extrate = extclk / (extdiv + 1); | |
137 | ||
138 | if (abs((long)extrate - (long)mode_clock) < | |
139 | abs((long)rate - (long)mode_clock)) { | |
140 | dev_dbg(rcrtc->group->dev->dev, | |
141 | "crtc%u: using external clock\n", rcrtc->index); | |
142 | escr = extdiv | ESCR_DCLKSEL_DCLKIN; | |
143 | } | |
144 | } | |
4bf8e196 | 145 | |
a5f0ef59 | 146 | rcar_du_group_write(rcrtc->group, rcrtc->index % 2 ? ESCR2 : ESCR, |
1b30dbde | 147 | escr); |
a5f0ef59 | 148 | rcar_du_group_write(rcrtc->group, rcrtc->index % 2 ? OTAR2 : OTAR, 0); |
4bf8e196 LP |
149 | |
150 | /* Signal polarities */ | |
151 | value = ((mode->flags & DRM_MODE_FLAG_PVSYNC) ? 0 : DSMR_VSL) | |
152 | | ((mode->flags & DRM_MODE_FLAG_PHSYNC) ? 0 : DSMR_HSL) | |
f67e1e05 | 153 | | DSMR_DIPM_DE | DSMR_CSPM; |
4bf8e196 LP |
154 | rcar_du_crtc_write(rcrtc, DSMR, value); |
155 | ||
156 | /* Display timings */ | |
157 | rcar_du_crtc_write(rcrtc, HDSR, mode->htotal - mode->hsync_start - 19); | |
158 | rcar_du_crtc_write(rcrtc, HDER, mode->htotal - mode->hsync_start + | |
159 | mode->hdisplay - 19); | |
160 | rcar_du_crtc_write(rcrtc, HSWR, mode->hsync_end - | |
161 | mode->hsync_start - 1); | |
162 | rcar_du_crtc_write(rcrtc, HCR, mode->htotal - 1); | |
163 | ||
906eff7f LP |
164 | rcar_du_crtc_write(rcrtc, VDSR, mode->crtc_vtotal - |
165 | mode->crtc_vsync_end - 2); | |
166 | rcar_du_crtc_write(rcrtc, VDER, mode->crtc_vtotal - | |
167 | mode->crtc_vsync_end + | |
168 | mode->crtc_vdisplay - 2); | |
169 | rcar_du_crtc_write(rcrtc, VSPR, mode->crtc_vtotal - | |
170 | mode->crtc_vsync_end + | |
171 | mode->crtc_vsync_start - 1); | |
172 | rcar_du_crtc_write(rcrtc, VCR, mode->crtc_vtotal - 1); | |
4bf8e196 LP |
173 | |
174 | rcar_du_crtc_write(rcrtc, DESR, mode->htotal - mode->hsync_start); | |
175 | rcar_du_crtc_write(rcrtc, DEWR, mode->hdisplay); | |
176 | } | |
177 | ||
ef67a902 LP |
178 | void rcar_du_crtc_route_output(struct drm_crtc *crtc, |
179 | enum rcar_du_output output) | |
4bf8e196 LP |
180 | { |
181 | struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc); | |
ef67a902 | 182 | struct rcar_du_device *rcdu = rcrtc->group->dev; |
4bf8e196 LP |
183 | |
184 | /* Store the route from the CRTC output to the DU output. The DU will be | |
185 | * configured when starting the CRTC. | |
186 | */ | |
ef67a902 | 187 | rcrtc->outputs |= BIT(output); |
7cbc05cb | 188 | |
0c1c8776 LP |
189 | /* Store RGB routing to DPAD0, the hardware will be configured when |
190 | * starting the CRTC. | |
191 | */ | |
192 | if (output == RCAR_DU_OUTPUT_DPAD0) | |
7cbc05cb | 193 | rcdu->dpad0_source = rcrtc->index; |
4bf8e196 LP |
194 | } |
195 | ||
4407cc02 LP |
196 | static unsigned int plane_zpos(struct rcar_du_plane *plane) |
197 | { | |
ec69a406 | 198 | return to_rcar_plane_state(plane->plane.state)->zpos; |
4407cc02 LP |
199 | } |
200 | ||
5bfcbce0 LP |
201 | static const struct rcar_du_format_info * |
202 | plane_format(struct rcar_du_plane *plane) | |
203 | { | |
ec69a406 | 204 | return to_rcar_plane_state(plane->plane.state)->format; |
5bfcbce0 LP |
205 | } |
206 | ||
52055baf | 207 | static void rcar_du_crtc_update_planes(struct rcar_du_crtc *rcrtc) |
4bf8e196 | 208 | { |
4bf8e196 LP |
209 | struct rcar_du_plane *planes[RCAR_DU_NUM_HW_PLANES]; |
210 | unsigned int num_planes = 0; | |
2a57e9b5 LP |
211 | unsigned int dptsr_planes; |
212 | unsigned int hwplanes = 0; | |
4bf8e196 LP |
213 | unsigned int prio = 0; |
214 | unsigned int i; | |
4bf8e196 LP |
215 | u32 dspr = 0; |
216 | ||
99caede1 LP |
217 | for (i = 0; i < ARRAY_SIZE(rcrtc->group->planes); ++i) { |
218 | struct rcar_du_plane *plane = &rcrtc->group->planes[i]; | |
4bf8e196 LP |
219 | unsigned int j; |
220 | ||
47094194 | 221 | if (plane->plane.state->crtc != &rcrtc->crtc) |
4bf8e196 LP |
222 | continue; |
223 | ||
224 | /* Insert the plane in the sorted planes array. */ | |
225 | for (j = num_planes++; j > 0; --j) { | |
4407cc02 | 226 | if (plane_zpos(planes[j-1]) <= plane_zpos(plane)) |
4bf8e196 LP |
227 | break; |
228 | planes[j] = planes[j-1]; | |
229 | } | |
230 | ||
231 | planes[j] = plane; | |
5bfcbce0 | 232 | prio += plane_format(plane)->planes * 4; |
4bf8e196 LP |
233 | } |
234 | ||
235 | for (i = 0; i < num_planes; ++i) { | |
236 | struct rcar_du_plane *plane = planes[i]; | |
5ee5a81d | 237 | struct drm_plane_state *state = plane->plane.state; |
ec69a406 | 238 | unsigned int index = to_rcar_plane_state(state)->hwindex; |
4bf8e196 LP |
239 | |
240 | prio -= 4; | |
241 | dspr |= (index + 1) << prio; | |
2a57e9b5 | 242 | hwplanes |= 1 << index; |
4bf8e196 | 243 | |
5bfcbce0 | 244 | if (plane_format(plane)->planes == 2) { |
4bf8e196 LP |
245 | index = (index + 1) % 8; |
246 | ||
247 | prio -= 4; | |
248 | dspr |= (index + 1) << prio; | |
2a57e9b5 | 249 | hwplanes |= 1 << index; |
4bf8e196 LP |
250 | } |
251 | } | |
252 | ||
2a57e9b5 LP |
253 | /* Update the planes to display timing and dot clock generator |
254 | * associations. | |
255 | * | |
256 | * Updating the DPTSR register requires restarting the CRTC group, | |
257 | * resulting in visible flicker. To mitigate the issue only update the | |
258 | * association if needed by enabled planes. Planes being disabled will | |
259 | * keep their current association. | |
4bf8e196 | 260 | */ |
2a57e9b5 LP |
261 | mutex_lock(&rcrtc->group->lock); |
262 | ||
263 | dptsr_planes = rcrtc->index % 2 ? rcrtc->group->dptsr_planes | hwplanes | |
264 | : rcrtc->group->dptsr_planes & ~hwplanes; | |
265 | ||
266 | if (dptsr_planes != rcrtc->group->dptsr_planes) { | |
267 | rcar_du_group_write(rcrtc->group, DPTSR, | |
268 | (dptsr_planes << 16) | dptsr_planes); | |
269 | rcrtc->group->dptsr_planes = dptsr_planes; | |
270 | ||
271 | if (rcrtc->group->used_crtcs) | |
272 | rcar_du_group_restart(rcrtc->group); | |
4bf8e196 LP |
273 | } |
274 | ||
2a57e9b5 LP |
275 | mutex_unlock(&rcrtc->group->lock); |
276 | ||
a5f0ef59 LP |
277 | rcar_du_group_write(rcrtc->group, rcrtc->index % 2 ? DS2PR : DS1PR, |
278 | dspr); | |
4bf8e196 LP |
279 | } |
280 | ||
17f6b8a0 LP |
281 | /* ----------------------------------------------------------------------------- |
282 | * Page Flip | |
283 | */ | |
284 | ||
285 | void rcar_du_crtc_cancel_page_flip(struct rcar_du_crtc *rcrtc, | |
286 | struct drm_file *file) | |
287 | { | |
288 | struct drm_pending_vblank_event *event; | |
289 | struct drm_device *dev = rcrtc->crtc.dev; | |
290 | unsigned long flags; | |
291 | ||
292 | /* Destroy the pending vertical blanking event associated with the | |
293 | * pending page flip, if any, and disable vertical blanking interrupts. | |
294 | */ | |
295 | spin_lock_irqsave(&dev->event_lock, flags); | |
296 | event = rcrtc->event; | |
297 | if (event && event->base.file_priv == file) { | |
298 | rcrtc->event = NULL; | |
299 | event->base.destroy(&event->base); | |
0cd90a54 | 300 | drm_crtc_vblank_put(&rcrtc->crtc); |
17f6b8a0 LP |
301 | } |
302 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
303 | } | |
304 | ||
305 | static void rcar_du_crtc_finish_page_flip(struct rcar_du_crtc *rcrtc) | |
306 | { | |
307 | struct drm_pending_vblank_event *event; | |
308 | struct drm_device *dev = rcrtc->crtc.dev; | |
309 | unsigned long flags; | |
310 | ||
311 | spin_lock_irqsave(&dev->event_lock, flags); | |
312 | event = rcrtc->event; | |
313 | rcrtc->event = NULL; | |
314 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
315 | ||
316 | if (event == NULL) | |
317 | return; | |
318 | ||
319 | spin_lock_irqsave(&dev->event_lock, flags); | |
320 | drm_send_vblank_event(dev, rcrtc->index, event); | |
36693f3c | 321 | wake_up(&rcrtc->flip_wait); |
17f6b8a0 LP |
322 | spin_unlock_irqrestore(&dev->event_lock, flags); |
323 | ||
0cd90a54 | 324 | drm_crtc_vblank_put(&rcrtc->crtc); |
17f6b8a0 LP |
325 | } |
326 | ||
36693f3c LP |
327 | static bool rcar_du_crtc_page_flip_pending(struct rcar_du_crtc *rcrtc) |
328 | { | |
329 | struct drm_device *dev = rcrtc->crtc.dev; | |
330 | unsigned long flags; | |
331 | bool pending; | |
332 | ||
333 | spin_lock_irqsave(&dev->event_lock, flags); | |
334 | pending = rcrtc->event != NULL; | |
335 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
336 | ||
337 | return pending; | |
338 | } | |
339 | ||
340 | static void rcar_du_crtc_wait_page_flip(struct rcar_du_crtc *rcrtc) | |
341 | { | |
342 | struct rcar_du_device *rcdu = rcrtc->group->dev; | |
343 | ||
344 | if (wait_event_timeout(rcrtc->flip_wait, | |
345 | !rcar_du_crtc_page_flip_pending(rcrtc), | |
346 | msecs_to_jiffies(50))) | |
347 | return; | |
348 | ||
349 | dev_warn(rcdu->dev, "page flip timeout\n"); | |
350 | ||
351 | rcar_du_crtc_finish_page_flip(rcrtc); | |
352 | } | |
353 | ||
17f6b8a0 LP |
354 | /* ----------------------------------------------------------------------------- |
355 | * Start/Stop and Suspend/Resume | |
356 | */ | |
357 | ||
4bf8e196 LP |
358 | static void rcar_du_crtc_start(struct rcar_du_crtc *rcrtc) |
359 | { | |
360 | struct drm_crtc *crtc = &rcrtc->crtc; | |
906eff7f | 361 | bool interlaced; |
4bf8e196 LP |
362 | |
363 | if (rcrtc->started) | |
364 | return; | |
365 | ||
4bf8e196 LP |
366 | /* Set display off and background to black */ |
367 | rcar_du_crtc_write(rcrtc, DOOR, DOOR_RGB(0, 0, 0)); | |
368 | rcar_du_crtc_write(rcrtc, BPOR, BPOR_RGB(0, 0, 0)); | |
369 | ||
370 | /* Configure display timings and output routing */ | |
371 | rcar_du_crtc_set_display_timing(rcrtc); | |
2fd22dba | 372 | rcar_du_group_set_routing(rcrtc->group); |
4bf8e196 | 373 | |
52055baf LP |
374 | /* Start with all planes disabled. */ |
375 | rcar_du_group_write(rcrtc->group, rcrtc->index % 2 ? DS2PR : DS1PR, 0); | |
4bf8e196 LP |
376 | |
377 | /* Select master sync mode. This enables display operation in master | |
378 | * sync mode (with the HSYNC and VSYNC signals configured as outputs and | |
379 | * actively driven). | |
380 | */ | |
906eff7f LP |
381 | interlaced = rcrtc->crtc.mode.flags & DRM_MODE_FLAG_INTERLACE; |
382 | rcar_du_crtc_clr_set(rcrtc, DSYSR, DSYSR_TVM_MASK | DSYSR_SCM_MASK, | |
383 | (interlaced ? DSYSR_SCM_INT_VIDEO : 0) | | |
384 | DSYSR_TVM_MASTER); | |
4bf8e196 | 385 | |
cb2025d2 | 386 | rcar_du_group_start_stop(rcrtc->group, true); |
4bf8e196 | 387 | |
0cd90a54 LP |
388 | /* Turn vertical blanking interrupt reporting back on. */ |
389 | drm_crtc_vblank_on(crtc); | |
390 | ||
4bf8e196 LP |
391 | rcrtc->started = true; |
392 | } | |
393 | ||
394 | static void rcar_du_crtc_stop(struct rcar_du_crtc *rcrtc) | |
395 | { | |
396 | struct drm_crtc *crtc = &rcrtc->crtc; | |
4bf8e196 LP |
397 | |
398 | if (!rcrtc->started) | |
399 | return; | |
400 | ||
911316fe LP |
401 | /* Disable all planes and wait for the change to take effect. This is |
402 | * required as the DSnPR registers are updated on vblank, and no vblank | |
403 | * will occur once the CRTC is stopped. Disabling planes when starting | |
404 | * the CRTC thus wouldn't be enough as it would start scanning out | |
405 | * immediately from old frame buffers until the next vblank. | |
406 | * | |
407 | * This increases the CRTC stop delay, especially when multiple CRTCs | |
408 | * are stopped in one operation as we now wait for one vblank per CRTC. | |
409 | * Whether this can be improved needs to be researched. | |
410 | */ | |
411 | rcar_du_group_write(rcrtc->group, rcrtc->index % 2 ? DS2PR : DS1PR, 0); | |
412 | drm_crtc_wait_one_vblank(crtc); | |
413 | ||
0cd90a54 LP |
414 | /* Disable vertical blanking interrupt reporting. We first need to wait |
415 | * for page flip completion before stopping the CRTC as userspace | |
416 | * expects page flips to eventually complete. | |
36693f3c LP |
417 | */ |
418 | rcar_du_crtc_wait_page_flip(rcrtc); | |
0cd90a54 | 419 | drm_crtc_vblank_off(crtc); |
36693f3c | 420 | |
4bf8e196 LP |
421 | /* Select switch sync mode. This stops display operation and configures |
422 | * the HSYNC and VSYNC signals as inputs. | |
423 | */ | |
424 | rcar_du_crtc_clr_set(rcrtc, DSYSR, DSYSR_TVM_MASK, DSYSR_TVM_SWITCH); | |
425 | ||
cb2025d2 | 426 | rcar_du_group_start_stop(rcrtc->group, false); |
4bf8e196 LP |
427 | |
428 | rcrtc->started = false; | |
429 | } | |
430 | ||
431 | void rcar_du_crtc_suspend(struct rcar_du_crtc *rcrtc) | |
432 | { | |
4bf8e196 | 433 | rcar_du_crtc_stop(rcrtc); |
f66ee304 | 434 | rcar_du_crtc_put(rcrtc); |
4bf8e196 LP |
435 | } |
436 | ||
437 | void rcar_du_crtc_resume(struct rcar_du_crtc *rcrtc) | |
438 | { | |
52055baf LP |
439 | unsigned int i; |
440 | ||
beff155a | 441 | if (!rcrtc->enabled) |
4bf8e196 LP |
442 | return; |
443 | ||
f66ee304 | 444 | rcar_du_crtc_get(rcrtc); |
4bf8e196 | 445 | rcar_du_crtc_start(rcrtc); |
52055baf LP |
446 | |
447 | /* Commit the planes state. */ | |
99caede1 LP |
448 | for (i = 0; i < ARRAY_SIZE(rcrtc->group->planes); ++i) { |
449 | struct rcar_du_plane *plane = &rcrtc->group->planes[i]; | |
52055baf LP |
450 | |
451 | if (plane->plane.state->crtc != &rcrtc->crtc) | |
452 | continue; | |
453 | ||
454 | rcar_du_plane_setup(plane); | |
455 | } | |
456 | ||
52055baf | 457 | rcar_du_crtc_update_planes(rcrtc); |
4bf8e196 LP |
458 | } |
459 | ||
17f6b8a0 LP |
460 | /* ----------------------------------------------------------------------------- |
461 | * CRTC Functions | |
462 | */ | |
463 | ||
beff155a | 464 | static void rcar_du_crtc_enable(struct drm_crtc *crtc) |
4bf8e196 | 465 | { |
4bf8e196 LP |
466 | struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc); |
467 | ||
beff155a LP |
468 | if (rcrtc->enabled) |
469 | return; | |
470 | ||
471 | rcar_du_crtc_get(rcrtc); | |
472 | rcar_du_crtc_start(rcrtc); | |
473 | ||
474 | rcrtc->enabled = true; | |
475 | } | |
476 | ||
477 | static void rcar_du_crtc_disable(struct drm_crtc *crtc) | |
478 | { | |
479 | struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc); | |
3dbf11e4 | 480 | |
beff155a | 481 | if (!rcrtc->enabled) |
4bf8e196 LP |
482 | return; |
483 | ||
beff155a LP |
484 | rcar_du_crtc_stop(rcrtc); |
485 | rcar_du_crtc_put(rcrtc); | |
4bf8e196 | 486 | |
beff155a | 487 | rcrtc->enabled = false; |
cf1cc6f2 | 488 | rcrtc->outputs = 0; |
beff155a LP |
489 | } |
490 | ||
4bf8e196 LP |
491 | static bool rcar_du_crtc_mode_fixup(struct drm_crtc *crtc, |
492 | const struct drm_display_mode *mode, | |
493 | struct drm_display_mode *adjusted_mode) | |
494 | { | |
495 | /* TODO Fixup modes */ | |
496 | return true; | |
497 | } | |
498 | ||
920888a2 LP |
499 | static void rcar_du_crtc_atomic_begin(struct drm_crtc *crtc) |
500 | { | |
d5746642 | 501 | struct drm_pending_vblank_event *event = crtc->state->event; |
920888a2 | 502 | struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc); |
d5746642 LP |
503 | struct drm_device *dev = rcrtc->crtc.dev; |
504 | unsigned long flags; | |
920888a2 | 505 | |
d5746642 | 506 | if (event) { |
d5746642 LP |
507 | WARN_ON(drm_crtc_vblank_get(crtc) != 0); |
508 | ||
509 | spin_lock_irqsave(&dev->event_lock, flags); | |
510 | rcrtc->event = event; | |
511 | spin_unlock_irqrestore(&dev->event_lock, flags); | |
512 | } | |
920888a2 LP |
513 | } |
514 | ||
515 | static void rcar_du_crtc_atomic_flush(struct drm_crtc *crtc) | |
516 | { | |
517 | struct rcar_du_crtc *rcrtc = to_rcar_crtc(crtc); | |
518 | ||
52055baf | 519 | rcar_du_crtc_update_planes(rcrtc); |
920888a2 LP |
520 | } |
521 | ||
4bf8e196 | 522 | static const struct drm_crtc_helper_funcs crtc_helper_funcs = { |
4bf8e196 | 523 | .mode_fixup = rcar_du_crtc_mode_fixup, |
4bf8e196 | 524 | .disable = rcar_du_crtc_disable, |
beff155a | 525 | .enable = rcar_du_crtc_enable, |
920888a2 LP |
526 | .atomic_begin = rcar_du_crtc_atomic_begin, |
527 | .atomic_flush = rcar_du_crtc_atomic_flush, | |
4bf8e196 LP |
528 | }; |
529 | ||
4bf8e196 | 530 | static const struct drm_crtc_funcs crtc_funcs = { |
3e8da87d | 531 | .reset = drm_atomic_helper_crtc_reset, |
4bf8e196 | 532 | .destroy = drm_crtc_cleanup, |
cf1cc6f2 | 533 | .set_config = drm_atomic_helper_set_config, |
d5746642 | 534 | .page_flip = drm_atomic_helper_page_flip, |
3e8da87d LP |
535 | .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, |
536 | .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, | |
4bf8e196 LP |
537 | }; |
538 | ||
17f6b8a0 LP |
539 | /* ----------------------------------------------------------------------------- |
540 | * Interrupt Handling | |
541 | */ | |
542 | ||
543 | static irqreturn_t rcar_du_crtc_irq(int irq, void *arg) | |
544 | { | |
545 | struct rcar_du_crtc *rcrtc = arg; | |
546 | irqreturn_t ret = IRQ_NONE; | |
547 | u32 status; | |
548 | ||
549 | status = rcar_du_crtc_read(rcrtc, DSSR); | |
550 | rcar_du_crtc_write(rcrtc, DSRCR, status & DSRCR_MASK); | |
551 | ||
552 | if (status & DSSR_FRM) { | |
553 | drm_handle_vblank(rcrtc->crtc.dev, rcrtc->index); | |
554 | rcar_du_crtc_finish_page_flip(rcrtc); | |
555 | ret = IRQ_HANDLED; | |
556 | } | |
557 | ||
558 | return ret; | |
559 | } | |
560 | ||
561 | /* ----------------------------------------------------------------------------- | |
562 | * Initialization | |
563 | */ | |
564 | ||
cb2025d2 | 565 | int rcar_du_crtc_create(struct rcar_du_group *rgrp, unsigned int index) |
4bf8e196 | 566 | { |
a5f0ef59 LP |
567 | static const unsigned int mmio_offsets[] = { |
568 | DU0_REG_OFFSET, DU1_REG_OFFSET, DU2_REG_OFFSET | |
569 | }; | |
570 | ||
cb2025d2 | 571 | struct rcar_du_device *rcdu = rgrp->dev; |
f66ee304 | 572 | struct platform_device *pdev = to_platform_device(rcdu->dev); |
4bf8e196 LP |
573 | struct rcar_du_crtc *rcrtc = &rcdu->crtcs[index]; |
574 | struct drm_crtc *crtc = &rcrtc->crtc; | |
f66ee304 | 575 | unsigned int irqflags; |
1b30dbde LP |
576 | struct clk *clk; |
577 | char clk_name[9]; | |
f66ee304 LP |
578 | char *name; |
579 | int irq; | |
4bf8e196 LP |
580 | int ret; |
581 | ||
1b30dbde | 582 | /* Get the CRTC clock and the optional external clock. */ |
f66ee304 LP |
583 | if (rcar_du_has(rcdu, RCAR_DU_FEATURE_CRTC_IRQ_CLOCK)) { |
584 | sprintf(clk_name, "du.%u", index); | |
585 | name = clk_name; | |
586 | } else { | |
587 | name = NULL; | |
588 | } | |
589 | ||
590 | rcrtc->clock = devm_clk_get(rcdu->dev, name); | |
591 | if (IS_ERR(rcrtc->clock)) { | |
592 | dev_err(rcdu->dev, "no clock for CRTC %u\n", index); | |
593 | return PTR_ERR(rcrtc->clock); | |
594 | } | |
595 | ||
1b30dbde LP |
596 | sprintf(clk_name, "dclkin.%u", index); |
597 | clk = devm_clk_get(rcdu->dev, clk_name); | |
598 | if (!IS_ERR(clk)) { | |
599 | rcrtc->extclock = clk; | |
600 | } else if (PTR_ERR(rcrtc->clock) == -EPROBE_DEFER) { | |
601 | dev_info(rcdu->dev, "can't get external clock %u\n", index); | |
602 | return -EPROBE_DEFER; | |
603 | } | |
604 | ||
36693f3c LP |
605 | init_waitqueue_head(&rcrtc->flip_wait); |
606 | ||
cb2025d2 | 607 | rcrtc->group = rgrp; |
a5f0ef59 | 608 | rcrtc->mmio_offset = mmio_offsets[index]; |
4bf8e196 | 609 | rcrtc->index = index; |
beff155a | 610 | rcrtc->enabled = false; |
4bf8e196 | 611 | |
53dff601 | 612 | ret = drm_crtc_init_with_planes(rcdu->ddev, crtc, |
99caede1 | 613 | &rgrp->planes[index % 2].plane, |
917de180 | 614 | NULL, &crtc_funcs); |
4bf8e196 LP |
615 | if (ret < 0) |
616 | return ret; | |
617 | ||
618 | drm_crtc_helper_add(crtc, &crtc_helper_funcs); | |
619 | ||
0cd90a54 LP |
620 | /* Start with vertical blanking interrupt reporting disabled. */ |
621 | drm_crtc_vblank_off(crtc); | |
622 | ||
f66ee304 LP |
623 | /* Register the interrupt handler. */ |
624 | if (rcar_du_has(rcdu, RCAR_DU_FEATURE_CRTC_IRQ_CLOCK)) { | |
625 | irq = platform_get_irq(pdev, index); | |
626 | irqflags = 0; | |
627 | } else { | |
628 | irq = platform_get_irq(pdev, 0); | |
629 | irqflags = IRQF_SHARED; | |
630 | } | |
631 | ||
632 | if (irq < 0) { | |
633 | dev_err(rcdu->dev, "no IRQ for CRTC %u\n", index); | |
6512f5fb | 634 | return irq; |
f66ee304 LP |
635 | } |
636 | ||
637 | ret = devm_request_irq(rcdu->dev, irq, rcar_du_crtc_irq, irqflags, | |
638 | dev_name(rcdu->dev), rcrtc); | |
639 | if (ret < 0) { | |
640 | dev_err(rcdu->dev, | |
641 | "failed to register IRQ for CRTC %u\n", index); | |
642 | return ret; | |
643 | } | |
644 | ||
4bf8e196 LP |
645 | return 0; |
646 | } | |
647 | ||
648 | void rcar_du_crtc_enable_vblank(struct rcar_du_crtc *rcrtc, bool enable) | |
649 | { | |
650 | if (enable) { | |
651 | rcar_du_crtc_write(rcrtc, DSRCR, DSRCR_VBCL); | |
652 | rcar_du_crtc_set(rcrtc, DIER, DIER_VBE); | |
653 | } else { | |
654 | rcar_du_crtc_clr(rcrtc, DIER, DIER_VBE); | |
655 | } | |
656 | } |