]>
Commit | Line | Data |
---|---|---|
c2fcd274 DV |
1 | /* |
2 | * Copyright (C) 2014 Red Hat | |
3 | * Copyright (C) 2014 Intel Corp. | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a | |
6 | * copy of this software and associated documentation files (the "Software"), | |
7 | * to deal in the Software without restriction, including without limitation | |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | * and/or sell copies of the Software, and to permit persons to whom the | |
10 | * Software is furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the 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 COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
21 | * OTHER DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Rob Clark <robdclark@gmail.com> | |
25 | * Daniel Vetter <daniel.vetter@ffwll.ch> | |
26 | */ | |
27 | ||
28 | #include <drm/drmP.h> | |
29 | #include <drm/drm_atomic.h> | |
30 | #include <drm/drm_plane_helper.h> | |
31 | #include <drm/drm_crtc_helper.h> | |
623369e5 | 32 | #include <drm/drm_atomic_helper.h> |
e2330f07 | 33 | #include <linux/fence.h> |
c2fcd274 DV |
34 | |
35 | static void | |
36 | drm_atomic_helper_plane_changed(struct drm_atomic_state *state, | |
37 | struct drm_plane_state *plane_state, | |
38 | struct drm_plane *plane) | |
39 | { | |
40 | struct drm_crtc_state *crtc_state; | |
41 | ||
42 | if (plane->state->crtc) { | |
43 | crtc_state = state->crtc_states[drm_crtc_index(plane->crtc)]; | |
44 | ||
45 | if (WARN_ON(!crtc_state)) | |
46 | return; | |
47 | ||
48 | crtc_state->planes_changed = true; | |
49 | } | |
50 | ||
51 | if (plane_state->crtc) { | |
52 | crtc_state = | |
53 | state->crtc_states[drm_crtc_index(plane_state->crtc)]; | |
54 | ||
55 | if (WARN_ON(!crtc_state)) | |
56 | return; | |
57 | ||
58 | crtc_state->planes_changed = true; | |
59 | } | |
60 | } | |
61 | ||
623369e5 DV |
62 | static struct drm_crtc * |
63 | get_current_crtc_for_encoder(struct drm_device *dev, | |
64 | struct drm_encoder *encoder) | |
65 | { | |
66 | struct drm_mode_config *config = &dev->mode_config; | |
67 | struct drm_connector *connector; | |
68 | ||
69 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
70 | ||
71 | list_for_each_entry(connector, &config->connector_list, head) { | |
72 | if (connector->state->best_encoder != encoder) | |
73 | continue; | |
74 | ||
75 | return connector->state->crtc; | |
76 | } | |
77 | ||
78 | return NULL; | |
79 | } | |
80 | ||
81 | static int | |
82 | steal_encoder(struct drm_atomic_state *state, | |
83 | struct drm_encoder *encoder, | |
84 | struct drm_crtc *encoder_crtc) | |
85 | { | |
86 | struct drm_mode_config *config = &state->dev->mode_config; | |
87 | struct drm_crtc_state *crtc_state; | |
88 | struct drm_connector *connector; | |
89 | struct drm_connector_state *connector_state; | |
042652ed | 90 | int ret; |
623369e5 DV |
91 | |
92 | /* | |
93 | * We can only steal an encoder coming from a connector, which means we | |
94 | * must already hold the connection_mutex. | |
95 | */ | |
96 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
97 | ||
98 | DRM_DEBUG_KMS("[ENCODER:%d:%s] in use on [CRTC:%d], stealing it\n", | |
99 | encoder->base.id, encoder->name, | |
100 | encoder_crtc->base.id); | |
101 | ||
102 | crtc_state = drm_atomic_get_crtc_state(state, encoder_crtc); | |
103 | if (IS_ERR(crtc_state)) | |
104 | return PTR_ERR(crtc_state); | |
105 | ||
106 | crtc_state->mode_changed = true; | |
107 | ||
108 | list_for_each_entry(connector, &config->connector_list, head) { | |
109 | if (connector->state->best_encoder != encoder) | |
110 | continue; | |
111 | ||
112 | DRM_DEBUG_KMS("Stealing encoder from [CONNECTOR:%d:%s]\n", | |
113 | connector->base.id, | |
114 | connector->name); | |
115 | ||
116 | connector_state = drm_atomic_get_connector_state(state, | |
117 | connector); | |
118 | if (IS_ERR(connector_state)) | |
119 | return PTR_ERR(connector_state); | |
120 | ||
042652ed DV |
121 | ret = drm_atomic_set_crtc_for_connector(connector_state, NULL); |
122 | if (ret) | |
123 | return ret; | |
623369e5 DV |
124 | connector_state->best_encoder = NULL; |
125 | } | |
126 | ||
127 | return 0; | |
128 | } | |
129 | ||
130 | static int | |
131 | update_connector_routing(struct drm_atomic_state *state, int conn_idx) | |
132 | { | |
133 | struct drm_connector_helper_funcs *funcs; | |
134 | struct drm_encoder *new_encoder; | |
135 | struct drm_crtc *encoder_crtc; | |
136 | struct drm_connector *connector; | |
137 | struct drm_connector_state *connector_state; | |
138 | struct drm_crtc_state *crtc_state; | |
139 | int idx, ret; | |
140 | ||
141 | connector = state->connectors[conn_idx]; | |
142 | connector_state = state->connector_states[conn_idx]; | |
143 | ||
144 | if (!connector) | |
145 | return 0; | |
146 | ||
147 | DRM_DEBUG_KMS("Updating routing for [CONNECTOR:%d:%s]\n", | |
148 | connector->base.id, | |
149 | connector->name); | |
150 | ||
151 | if (connector->state->crtc != connector_state->crtc) { | |
152 | if (connector->state->crtc) { | |
153 | idx = drm_crtc_index(connector->state->crtc); | |
154 | ||
155 | crtc_state = state->crtc_states[idx]; | |
156 | crtc_state->mode_changed = true; | |
157 | } | |
158 | ||
159 | if (connector_state->crtc) { | |
160 | idx = drm_crtc_index(connector_state->crtc); | |
161 | ||
162 | crtc_state = state->crtc_states[idx]; | |
163 | crtc_state->mode_changed = true; | |
164 | } | |
165 | } | |
166 | ||
167 | if (!connector_state->crtc) { | |
168 | DRM_DEBUG_KMS("Disabling [CONNECTOR:%d:%s]\n", | |
169 | connector->base.id, | |
170 | connector->name); | |
171 | ||
172 | connector_state->best_encoder = NULL; | |
173 | ||
174 | return 0; | |
175 | } | |
176 | ||
177 | funcs = connector->helper_private; | |
178 | new_encoder = funcs->best_encoder(connector); | |
179 | ||
180 | if (!new_encoder) { | |
181 | DRM_DEBUG_KMS("No suitable encoder found for [CONNECTOR:%d:%s]\n", | |
182 | connector->base.id, | |
183 | connector->name); | |
184 | return -EINVAL; | |
185 | } | |
186 | ||
187 | if (new_encoder == connector_state->best_encoder) { | |
188 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d]\n", | |
189 | connector->base.id, | |
190 | connector->name, | |
191 | new_encoder->base.id, | |
192 | new_encoder->name, | |
193 | connector_state->crtc->base.id); | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | encoder_crtc = get_current_crtc_for_encoder(state->dev, | |
199 | new_encoder); | |
200 | ||
201 | if (encoder_crtc) { | |
202 | ret = steal_encoder(state, new_encoder, encoder_crtc); | |
203 | if (ret) { | |
204 | DRM_DEBUG_KMS("Encoder stealing failed for [CONNECTOR:%d:%s]\n", | |
205 | connector->base.id, | |
206 | connector->name); | |
207 | return ret; | |
208 | } | |
209 | } | |
210 | ||
211 | connector_state->best_encoder = new_encoder; | |
212 | idx = drm_crtc_index(connector_state->crtc); | |
213 | ||
214 | crtc_state = state->crtc_states[idx]; | |
215 | crtc_state->mode_changed = true; | |
216 | ||
217 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d]\n", | |
218 | connector->base.id, | |
219 | connector->name, | |
220 | new_encoder->base.id, | |
221 | new_encoder->name, | |
222 | connector_state->crtc->base.id); | |
223 | ||
224 | return 0; | |
225 | } | |
226 | ||
227 | static int | |
228 | mode_fixup(struct drm_atomic_state *state) | |
229 | { | |
230 | int ncrtcs = state->dev->mode_config.num_crtc; | |
231 | int nconnectors = state->dev->mode_config.num_connector; | |
232 | struct drm_crtc_state *crtc_state; | |
233 | struct drm_connector_state *conn_state; | |
234 | int i; | |
235 | bool ret; | |
236 | ||
237 | for (i = 0; i < ncrtcs; i++) { | |
238 | crtc_state = state->crtc_states[i]; | |
239 | ||
240 | if (!crtc_state || !crtc_state->mode_changed) | |
241 | continue; | |
242 | ||
243 | drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); | |
244 | } | |
245 | ||
246 | for (i = 0; i < nconnectors; i++) { | |
247 | struct drm_encoder_helper_funcs *funcs; | |
248 | struct drm_encoder *encoder; | |
249 | ||
250 | conn_state = state->connector_states[i]; | |
251 | ||
252 | if (!conn_state) | |
253 | continue; | |
254 | ||
255 | WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); | |
256 | ||
257 | if (!conn_state->crtc || !conn_state->best_encoder) | |
258 | continue; | |
259 | ||
260 | crtc_state = | |
261 | state->crtc_states[drm_crtc_index(conn_state->crtc)]; | |
262 | ||
263 | /* | |
264 | * Each encoder has at most one connector (since we always steal | |
265 | * it away), so we won't call ->mode_fixup twice. | |
266 | */ | |
267 | encoder = conn_state->best_encoder; | |
268 | funcs = encoder->helper_private; | |
269 | ||
270 | if (encoder->bridge && encoder->bridge->funcs->mode_fixup) { | |
271 | ret = encoder->bridge->funcs->mode_fixup( | |
272 | encoder->bridge, &crtc_state->mode, | |
273 | &crtc_state->adjusted_mode); | |
274 | if (!ret) { | |
275 | DRM_DEBUG_KMS("Bridge fixup failed\n"); | |
276 | return -EINVAL; | |
277 | } | |
278 | } | |
279 | ||
280 | ||
281 | ret = funcs->mode_fixup(encoder, &crtc_state->mode, | |
282 | &crtc_state->adjusted_mode); | |
283 | if (!ret) { | |
284 | DRM_DEBUG_KMS("[ENCODER:%d:%s] fixup failed\n", | |
285 | encoder->base.id, encoder->name); | |
286 | return -EINVAL; | |
287 | } | |
288 | } | |
289 | ||
290 | for (i = 0; i < ncrtcs; i++) { | |
291 | struct drm_crtc_helper_funcs *funcs; | |
292 | struct drm_crtc *crtc; | |
293 | ||
294 | crtc_state = state->crtc_states[i]; | |
295 | crtc = state->crtcs[i]; | |
296 | ||
297 | if (!crtc_state || !crtc_state->mode_changed) | |
298 | continue; | |
299 | ||
300 | funcs = crtc->helper_private; | |
301 | ret = funcs->mode_fixup(crtc, &crtc_state->mode, | |
302 | &crtc_state->adjusted_mode); | |
303 | if (!ret) { | |
304 | DRM_DEBUG_KMS("[CRTC:%d] fixup failed\n", | |
305 | crtc->base.id); | |
306 | return -EINVAL; | |
307 | } | |
308 | } | |
309 | ||
310 | return 0; | |
311 | } | |
312 | ||
313 | static int | |
314 | drm_atomic_helper_check_prepare(struct drm_device *dev, | |
315 | struct drm_atomic_state *state) | |
316 | { | |
317 | int ncrtcs = dev->mode_config.num_crtc; | |
318 | int nconnectors = dev->mode_config.num_connector; | |
319 | struct drm_crtc *crtc; | |
320 | struct drm_crtc_state *crtc_state; | |
321 | int i, ret; | |
322 | ||
323 | for (i = 0; i < ncrtcs; i++) { | |
324 | crtc = state->crtcs[i]; | |
325 | crtc_state = state->crtc_states[i]; | |
326 | ||
327 | if (!crtc) | |
328 | continue; | |
329 | ||
330 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { | |
331 | DRM_DEBUG_KMS("[CRTC:%d] mode changed\n", | |
332 | crtc->base.id); | |
333 | crtc_state->mode_changed = true; | |
334 | } | |
335 | ||
336 | if (crtc->state->enable != crtc_state->enable) { | |
337 | DRM_DEBUG_KMS("[CRTC:%d] enable changed\n", | |
338 | crtc->base.id); | |
339 | crtc_state->mode_changed = true; | |
340 | } | |
341 | } | |
342 | ||
343 | for (i = 0; i < nconnectors; i++) { | |
344 | /* | |
345 | * This only sets crtc->mode_changed for routing changes, | |
346 | * drivers must set crtc->mode_changed themselves when connector | |
347 | * properties need to be updated. | |
348 | */ | |
349 | ret = update_connector_routing(state, i); | |
350 | if (ret) | |
351 | return ret; | |
352 | } | |
353 | ||
354 | /* | |
355 | * After all the routing has been prepared we need to add in any | |
356 | * connector which is itself unchanged, but who's crtc changes it's | |
357 | * configuration. This must be done before calling mode_fixup in case a | |
358 | * crtc only changed its mode but has the same set of connectors. | |
359 | */ | |
360 | for (i = 0; i < ncrtcs; i++) { | |
361 | int num_connectors; | |
362 | ||
363 | crtc = state->crtcs[i]; | |
364 | crtc_state = state->crtc_states[i]; | |
365 | ||
366 | if (!crtc || !crtc_state->mode_changed) | |
367 | continue; | |
368 | ||
369 | DRM_DEBUG_KMS("[CRTC:%d] needs full modeset, enable: %c\n", | |
370 | crtc->base.id, | |
371 | crtc_state->enable ? 'y' : 'n'); | |
372 | ||
373 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
374 | if (ret != 0) | |
375 | return ret; | |
376 | ||
377 | num_connectors = drm_atomic_connectors_for_crtc(state, | |
378 | crtc); | |
379 | ||
380 | if (crtc_state->enable != !!num_connectors) { | |
381 | DRM_DEBUG_KMS("[CRTC:%d] enabled/connectors mismatch\n", | |
382 | crtc->base.id); | |
383 | ||
384 | return -EINVAL; | |
385 | } | |
386 | } | |
387 | ||
388 | return mode_fixup(state); | |
389 | } | |
390 | ||
c2fcd274 DV |
391 | /** |
392 | * drm_atomic_helper_check - validate state object | |
393 | * @dev: DRM device | |
394 | * @state: the driver state object | |
395 | * | |
396 | * Check the state object to see if the requested state is physically possible. | |
397 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
398 | * checking that a driver needs it can simply wrap that around this function. | |
399 | * Drivers without such needs can directly use this as their ->atomic_check() | |
400 | * callback. | |
401 | * | |
402 | * RETURNS | |
403 | * Zero for success or -errno | |
404 | */ | |
405 | int drm_atomic_helper_check(struct drm_device *dev, | |
406 | struct drm_atomic_state *state) | |
407 | { | |
408 | int nplanes = dev->mode_config.num_total_plane; | |
409 | int ncrtcs = dev->mode_config.num_crtc; | |
410 | int i, ret = 0; | |
411 | ||
623369e5 DV |
412 | ret = drm_atomic_helper_check_prepare(dev, state); |
413 | if (ret) | |
414 | return ret; | |
415 | ||
c2fcd274 DV |
416 | for (i = 0; i < nplanes; i++) { |
417 | struct drm_plane_helper_funcs *funcs; | |
418 | struct drm_plane *plane = state->planes[i]; | |
419 | struct drm_plane_state *plane_state = state->plane_states[i]; | |
420 | ||
421 | if (!plane) | |
422 | continue; | |
423 | ||
424 | funcs = plane->helper_private; | |
425 | ||
426 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
427 | ||
428 | if (!funcs || !funcs->atomic_check) | |
429 | continue; | |
430 | ||
431 | ret = funcs->atomic_check(plane, plane_state); | |
432 | if (ret) { | |
433 | DRM_DEBUG_KMS("[PLANE:%d] atomic check failed\n", | |
434 | plane->base.id); | |
435 | return ret; | |
436 | } | |
437 | } | |
438 | ||
439 | for (i = 0; i < ncrtcs; i++) { | |
440 | struct drm_crtc_helper_funcs *funcs; | |
441 | struct drm_crtc *crtc = state->crtcs[i]; | |
442 | ||
443 | if (!crtc) | |
444 | continue; | |
445 | ||
446 | funcs = crtc->helper_private; | |
447 | ||
448 | if (!funcs || !funcs->atomic_check) | |
449 | continue; | |
450 | ||
451 | ret = funcs->atomic_check(crtc, state->crtc_states[i]); | |
452 | if (ret) { | |
453 | DRM_DEBUG_KMS("[CRTC:%d] atomic check failed\n", | |
454 | crtc->base.id); | |
455 | return ret; | |
456 | } | |
457 | } | |
458 | ||
459 | return ret; | |
460 | } | |
461 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
462 | ||
623369e5 DV |
463 | static void |
464 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
465 | { | |
466 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
467 | int nconnectors = old_state->dev->mode_config.num_connector; | |
468 | int i; | |
469 | ||
470 | for (i = 0; i < nconnectors; i++) { | |
471 | struct drm_connector_state *old_conn_state; | |
472 | struct drm_connector *connector; | |
473 | struct drm_encoder_helper_funcs *funcs; | |
474 | struct drm_encoder *encoder; | |
475 | ||
476 | old_conn_state = old_state->connector_states[i]; | |
477 | connector = old_state->connectors[i]; | |
478 | ||
479 | /* Shut down everything that's in the changeset and currently | |
480 | * still on. So need to check the old, saved state. */ | |
481 | if (!old_conn_state || !old_conn_state->crtc) | |
482 | continue; | |
483 | ||
484 | encoder = connector->state->best_encoder; | |
485 | ||
486 | if (!encoder) | |
487 | continue; | |
488 | ||
489 | funcs = encoder->helper_private; | |
490 | ||
491 | /* | |
492 | * Each encoder has at most one connector (since we always steal | |
493 | * it away), so we won't call call disable hooks twice. | |
494 | */ | |
495 | if (encoder->bridge) | |
496 | encoder->bridge->funcs->disable(encoder->bridge); | |
497 | ||
498 | /* Right function depends upon target state. */ | |
499 | if (connector->state->crtc) | |
500 | funcs->prepare(encoder); | |
501 | else if (funcs->disable) | |
502 | funcs->disable(encoder); | |
503 | else | |
504 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
505 | ||
506 | if (encoder->bridge) | |
507 | encoder->bridge->funcs->post_disable(encoder->bridge); | |
508 | } | |
509 | ||
510 | for (i = 0; i < ncrtcs; i++) { | |
511 | struct drm_crtc_helper_funcs *funcs; | |
512 | struct drm_crtc *crtc; | |
513 | ||
514 | crtc = old_state->crtcs[i]; | |
515 | ||
516 | /* Shut down everything that needs a full modeset. */ | |
517 | if (!crtc || !crtc->state->mode_changed) | |
518 | continue; | |
519 | ||
520 | funcs = crtc->helper_private; | |
521 | ||
522 | /* Right function depends upon target state. */ | |
523 | if (crtc->state->enable) | |
524 | funcs->prepare(crtc); | |
525 | else if (funcs->disable) | |
526 | funcs->disable(crtc); | |
527 | else | |
528 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
529 | } | |
530 | } | |
531 | ||
532 | static void | |
533 | set_routing_links(struct drm_device *dev, struct drm_atomic_state *old_state) | |
534 | { | |
535 | int nconnectors = dev->mode_config.num_connector; | |
536 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
537 | int i; | |
538 | ||
539 | /* clear out existing links */ | |
540 | for (i = 0; i < nconnectors; i++) { | |
541 | struct drm_connector *connector; | |
542 | ||
543 | connector = old_state->connectors[i]; | |
544 | ||
545 | if (!connector || !connector->encoder) | |
546 | continue; | |
547 | ||
548 | WARN_ON(!connector->encoder->crtc); | |
549 | ||
550 | connector->encoder->crtc = NULL; | |
551 | connector->encoder = NULL; | |
552 | } | |
553 | ||
554 | /* set new links */ | |
555 | for (i = 0; i < nconnectors; i++) { | |
556 | struct drm_connector *connector; | |
557 | ||
558 | connector = old_state->connectors[i]; | |
559 | ||
560 | if (!connector || !connector->state->crtc) | |
561 | continue; | |
562 | ||
563 | if (WARN_ON(!connector->state->best_encoder)) | |
564 | continue; | |
565 | ||
566 | connector->encoder = connector->state->best_encoder; | |
567 | connector->encoder->crtc = connector->state->crtc; | |
568 | } | |
569 | ||
570 | /* set legacy state in the crtc structure */ | |
571 | for (i = 0; i < ncrtcs; i++) { | |
572 | struct drm_crtc *crtc; | |
573 | ||
574 | crtc = old_state->crtcs[i]; | |
575 | ||
576 | if (!crtc) | |
577 | continue; | |
578 | ||
579 | crtc->mode = crtc->state->mode; | |
580 | crtc->enabled = crtc->state->enable; | |
581 | crtc->x = crtc->primary->state->src_x >> 16; | |
582 | crtc->y = crtc->primary->state->src_y >> 16; | |
583 | } | |
584 | } | |
585 | ||
586 | static void | |
587 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
588 | { | |
589 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
590 | int nconnectors = old_state->dev->mode_config.num_connector; | |
591 | int i; | |
592 | ||
593 | for (i = 0; i < ncrtcs; i++) { | |
594 | struct drm_crtc_helper_funcs *funcs; | |
595 | struct drm_crtc *crtc; | |
596 | ||
597 | crtc = old_state->crtcs[i]; | |
598 | ||
599 | if (!crtc || !crtc->state->mode_changed) | |
600 | continue; | |
601 | ||
602 | funcs = crtc->helper_private; | |
603 | ||
604 | if (crtc->state->enable) | |
605 | funcs->mode_set_nofb(crtc); | |
606 | } | |
607 | ||
608 | for (i = 0; i < nconnectors; i++) { | |
609 | struct drm_connector *connector; | |
610 | struct drm_crtc_state *new_crtc_state; | |
611 | struct drm_encoder_helper_funcs *funcs; | |
612 | struct drm_encoder *encoder; | |
613 | struct drm_display_mode *mode, *adjusted_mode; | |
614 | ||
615 | connector = old_state->connectors[i]; | |
616 | ||
617 | if (!connector || !connector->state->best_encoder) | |
618 | continue; | |
619 | ||
620 | encoder = connector->state->best_encoder; | |
621 | funcs = encoder->helper_private; | |
622 | new_crtc_state = connector->state->crtc->state; | |
623 | mode = &new_crtc_state->mode; | |
624 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
625 | ||
626 | /* | |
627 | * Each encoder has at most one connector (since we always steal | |
628 | * it away), so we won't call call mode_set hooks twice. | |
629 | */ | |
630 | funcs->mode_set(encoder, mode, adjusted_mode); | |
631 | ||
632 | if (encoder->bridge && encoder->bridge->funcs->mode_set) | |
633 | encoder->bridge->funcs->mode_set(encoder->bridge, | |
634 | mode, adjusted_mode); | |
635 | } | |
636 | } | |
637 | ||
638 | /** | |
639 | * drm_atomic_helper_commit_pre_planes - modeset commit before plane updates | |
640 | * @dev: DRM device | |
641 | * @state: atomic state | |
642 | * | |
643 | * This function commits the modeset changes that need to be committed before | |
644 | * updating planes. It shuts down all the outputs that need to be shut down and | |
645 | * prepares them (if required) with the new mode. | |
646 | */ | |
647 | void drm_atomic_helper_commit_pre_planes(struct drm_device *dev, | |
648 | struct drm_atomic_state *state) | |
649 | { | |
650 | disable_outputs(dev, state); | |
651 | set_routing_links(dev, state); | |
652 | crtc_set_mode(dev, state); | |
653 | } | |
654 | EXPORT_SYMBOL(drm_atomic_helper_commit_pre_planes); | |
655 | ||
656 | /** | |
657 | * drm_atomic_helper_commit_post_planes - modeset commit after plane updates | |
658 | * @dev: DRM device | |
659 | * @old_state: atomic state object with old state structures | |
660 | * | |
661 | * This function commits the modeset changes that need to be committed after | |
662 | * updating planes: It enables all the outputs with the new configuration which | |
663 | * had to be turned off for the update. | |
664 | */ | |
665 | void drm_atomic_helper_commit_post_planes(struct drm_device *dev, | |
666 | struct drm_atomic_state *old_state) | |
667 | { | |
668 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
669 | int nconnectors = old_state->dev->mode_config.num_connector; | |
670 | int i; | |
671 | ||
672 | for (i = 0; i < ncrtcs; i++) { | |
673 | struct drm_crtc_helper_funcs *funcs; | |
674 | struct drm_crtc *crtc; | |
675 | ||
676 | crtc = old_state->crtcs[i]; | |
677 | ||
678 | /* Need to filter out CRTCs where only planes change. */ | |
679 | if (!crtc || !crtc->state->mode_changed) | |
680 | continue; | |
681 | ||
682 | funcs = crtc->helper_private; | |
683 | ||
684 | if (crtc->state->enable) | |
685 | funcs->commit(crtc); | |
686 | } | |
687 | ||
688 | for (i = 0; i < nconnectors; i++) { | |
689 | struct drm_connector *connector; | |
690 | struct drm_encoder_helper_funcs *funcs; | |
691 | struct drm_encoder *encoder; | |
692 | ||
693 | connector = old_state->connectors[i]; | |
694 | ||
695 | if (!connector || !connector->state->best_encoder) | |
696 | continue; | |
697 | ||
698 | encoder = connector->state->best_encoder; | |
699 | funcs = encoder->helper_private; | |
700 | ||
701 | /* | |
702 | * Each encoder has at most one connector (since we always steal | |
703 | * it away), so we won't call call enable hooks twice. | |
704 | */ | |
705 | if (encoder->bridge) | |
706 | encoder->bridge->funcs->pre_enable(encoder->bridge); | |
707 | ||
708 | funcs->commit(encoder); | |
709 | ||
710 | if (encoder->bridge) | |
711 | encoder->bridge->funcs->enable(encoder->bridge); | |
712 | } | |
713 | } | |
714 | EXPORT_SYMBOL(drm_atomic_helper_commit_post_planes); | |
715 | ||
e2330f07 DV |
716 | static void wait_for_fences(struct drm_device *dev, |
717 | struct drm_atomic_state *state) | |
718 | { | |
719 | int nplanes = dev->mode_config.num_total_plane; | |
720 | int i; | |
721 | ||
722 | for (i = 0; i < nplanes; i++) { | |
723 | struct drm_plane *plane = state->planes[i]; | |
724 | ||
725 | if (!plane || !plane->state->fence) | |
726 | continue; | |
727 | ||
728 | WARN_ON(!plane->state->fb); | |
729 | ||
730 | fence_wait(plane->state->fence, false); | |
731 | fence_put(plane->state->fence); | |
732 | plane->state->fence = NULL; | |
733 | } | |
734 | } | |
735 | ||
623369e5 DV |
736 | static void |
737 | wait_for_vblanks(struct drm_device *dev, struct drm_atomic_state *old_state) | |
738 | { | |
739 | struct drm_crtc *crtc; | |
740 | struct drm_crtc_state *old_crtc_state; | |
741 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
742 | int i, ret; | |
743 | ||
744 | for (i = 0; i < ncrtcs; i++) { | |
745 | crtc = old_state->crtcs[i]; | |
746 | old_crtc_state = old_state->crtc_states[i]; | |
747 | ||
748 | if (!crtc) | |
749 | continue; | |
750 | ||
751 | /* No one cares about the old state, so abuse it for tracking | |
752 | * and store whether we hold a vblank reference (and should do a | |
753 | * vblank wait) in the ->enable boolean. */ | |
754 | old_crtc_state->enable = false; | |
755 | ||
756 | if (!crtc->state->enable) | |
757 | continue; | |
758 | ||
759 | ret = drm_crtc_vblank_get(crtc); | |
760 | if (ret != 0) | |
761 | continue; | |
762 | ||
763 | old_crtc_state->enable = true; | |
764 | old_crtc_state->last_vblank_count = drm_vblank_count(dev, i); | |
765 | } | |
766 | ||
767 | for (i = 0; i < ncrtcs; i++) { | |
768 | crtc = old_state->crtcs[i]; | |
769 | old_crtc_state = old_state->crtc_states[i]; | |
770 | ||
771 | if (!crtc || !old_crtc_state->enable) | |
772 | continue; | |
773 | ||
774 | ret = wait_event_timeout(dev->vblank[i].queue, | |
775 | old_crtc_state->last_vblank_count != | |
776 | drm_vblank_count(dev, i), | |
777 | msecs_to_jiffies(50)); | |
778 | ||
779 | drm_crtc_vblank_put(crtc); | |
780 | } | |
781 | } | |
782 | ||
783 | /** | |
784 | * drm_atomic_helper_commit - commit validated state object | |
785 | * @dev: DRM device | |
786 | * @state: the driver state object | |
787 | * @async: asynchronous commit | |
788 | * | |
789 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
790 | * object. This can still fail when e.g. the framebuffer reservation fails. For | |
791 | * now this doesn't implement asynchronous commits. | |
792 | * | |
793 | * RETURNS | |
794 | * Zero for success or -errno. | |
795 | */ | |
796 | int drm_atomic_helper_commit(struct drm_device *dev, | |
797 | struct drm_atomic_state *state, | |
798 | bool async) | |
799 | { | |
800 | int ret; | |
801 | ||
802 | if (async) | |
803 | return -EBUSY; | |
804 | ||
805 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
806 | if (ret) | |
807 | return ret; | |
808 | ||
809 | /* | |
810 | * This is the point of no return - everything below never fails except | |
811 | * when the hw goes bonghits. Which means we can commit the new state on | |
812 | * the software side now. | |
813 | */ | |
814 | ||
815 | drm_atomic_helper_swap_state(dev, state); | |
816 | ||
817 | /* | |
818 | * Everything below can be run asynchronously without the need to grab | |
819 | * any modeset locks at all under one conditions: It must be guaranteed | |
820 | * that the asynchronous work has either been cancelled (if the driver | |
821 | * supports it, which at least requires that the framebuffers get | |
822 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
823 | * before the new state gets committed on the software side with | |
824 | * drm_atomic_helper_swap_state(). | |
825 | * | |
826 | * This scheme allows new atomic state updates to be prepared and | |
827 | * checked in parallel to the asynchronous completion of the previous | |
828 | * update. Which is important since compositors need to figure out the | |
829 | * composition of the next frame right after having submitted the | |
830 | * current layout. | |
831 | */ | |
832 | ||
e2330f07 DV |
833 | wait_for_fences(dev, state); |
834 | ||
623369e5 DV |
835 | drm_atomic_helper_commit_pre_planes(dev, state); |
836 | ||
837 | drm_atomic_helper_commit_planes(dev, state); | |
838 | ||
839 | drm_atomic_helper_commit_post_planes(dev, state); | |
840 | ||
841 | wait_for_vblanks(dev, state); | |
842 | ||
843 | drm_atomic_helper_cleanup_planes(dev, state); | |
844 | ||
845 | drm_atomic_state_free(state); | |
846 | ||
847 | return 0; | |
848 | } | |
849 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
850 | ||
e8c833a7 DV |
851 | /** |
852 | * DOC: implementing async commit | |
853 | * | |
854 | * For now the atomic helpers don't support async commit directly. If there is | |
855 | * real need it could be added though, using the dma-buf fence infrastructure | |
856 | * for generic synchronization with outstanding rendering. | |
857 | * | |
858 | * For now drivers have to implement async commit themselves, with the following | |
859 | * sequence being the recommended one: | |
860 | * | |
861 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
862 | * which commit needs to call which can fail, so we want to run it first and | |
863 | * synchronously. | |
864 | * | |
865 | * 2. Synchronize with any outstanding asynchronous commit worker threads which | |
866 | * might be affected the new state update. This can be done by either cancelling | |
867 | * or flushing the work items, depending upon whether the driver can deal with | |
868 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
869 | * cleanup is still done when cancelling. | |
870 | * | |
871 | * For sufficient parallelism it is recommended to have a work item per crtc | |
872 | * (for updates which don't touch global state) and a global one. Then we only | |
873 | * need to synchronize with the crtc work items for changed crtcs and the global | |
874 | * work item, which allows nice concurrent updates on disjoint sets of crtcs. | |
875 | * | |
876 | * 3. The software state is updated synchronously with | |
877 | * drm_atomic_helper_swap_state. Doing this under the protection of all modeset | |
878 | * locks means concurrent callers never see inconsistent state. And doing this | |
879 | * while it's guaranteed that no relevant async worker runs means that async | |
880 | * workers do not need grab any locks. Actually they must not grab locks, for | |
881 | * otherwise the work flushing will deadlock. | |
882 | * | |
883 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
884 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
885 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
886 | * being displayed. | |
887 | */ | |
888 | ||
c2fcd274 DV |
889 | /** |
890 | * drm_atomic_helper_prepare_planes - prepare plane resources after commit | |
891 | * @dev: DRM device | |
892 | * @state: atomic state object with old state structures | |
893 | * | |
894 | * This function prepares plane state, specifically framebuffers, for the new | |
895 | * configuration. If any failure is encountered this function will call | |
896 | * ->cleanup_fb on any already successfully prepared framebuffer. | |
897 | * | |
898 | * Returns: | |
899 | * 0 on success, negative error code on failure. | |
900 | */ | |
901 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
902 | struct drm_atomic_state *state) | |
903 | { | |
904 | int nplanes = dev->mode_config.num_total_plane; | |
905 | int ret, i; | |
906 | ||
907 | for (i = 0; i < nplanes; i++) { | |
908 | struct drm_plane_helper_funcs *funcs; | |
909 | struct drm_plane *plane = state->planes[i]; | |
910 | struct drm_framebuffer *fb; | |
911 | ||
912 | if (!plane) | |
913 | continue; | |
914 | ||
915 | funcs = plane->helper_private; | |
916 | ||
917 | fb = state->plane_states[i]->fb; | |
918 | ||
919 | if (fb && funcs->prepare_fb) { | |
920 | ret = funcs->prepare_fb(plane, fb); | |
921 | if (ret) | |
922 | goto fail; | |
923 | } | |
924 | } | |
925 | ||
926 | return 0; | |
927 | ||
928 | fail: | |
929 | for (i--; i >= 0; i--) { | |
930 | struct drm_plane_helper_funcs *funcs; | |
931 | struct drm_plane *plane = state->planes[i]; | |
932 | struct drm_framebuffer *fb; | |
933 | ||
934 | if (!plane) | |
935 | continue; | |
936 | ||
937 | funcs = plane->helper_private; | |
938 | ||
939 | fb = state->plane_states[i]->fb; | |
940 | ||
941 | if (fb && funcs->cleanup_fb) | |
942 | funcs->cleanup_fb(plane, fb); | |
943 | ||
944 | } | |
945 | ||
946 | return ret; | |
947 | } | |
948 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
949 | ||
950 | /** | |
951 | * drm_atomic_helper_commit_planes - commit plane state | |
952 | * @dev: DRM device | |
953 | * @state: atomic state | |
954 | * | |
955 | * This function commits the new plane state using the plane and atomic helper | |
956 | * functions for planes and crtcs. It assumes that the atomic state has already | |
957 | * been pushed into the relevant object state pointers, since this step can no | |
958 | * longer fail. | |
959 | * | |
960 | * It still requires the global state object @state to know which planes and | |
961 | * crtcs need to be updated though. | |
962 | */ | |
963 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
964 | struct drm_atomic_state *state) | |
965 | { | |
966 | int nplanes = dev->mode_config.num_total_plane; | |
967 | int ncrtcs = dev->mode_config.num_crtc; | |
968 | int i; | |
969 | ||
970 | for (i = 0; i < ncrtcs; i++) { | |
971 | struct drm_crtc_helper_funcs *funcs; | |
972 | struct drm_crtc *crtc = state->crtcs[i]; | |
973 | ||
974 | if (!crtc) | |
975 | continue; | |
976 | ||
977 | funcs = crtc->helper_private; | |
978 | ||
979 | if (!funcs || !funcs->atomic_begin) | |
980 | continue; | |
981 | ||
982 | funcs->atomic_begin(crtc); | |
983 | } | |
984 | ||
985 | for (i = 0; i < nplanes; i++) { | |
986 | struct drm_plane_helper_funcs *funcs; | |
987 | struct drm_plane *plane = state->planes[i]; | |
988 | ||
989 | if (!plane) | |
990 | continue; | |
991 | ||
992 | funcs = plane->helper_private; | |
993 | ||
994 | if (!funcs || !funcs->atomic_update) | |
995 | continue; | |
996 | ||
997 | funcs->atomic_update(plane); | |
998 | } | |
999 | ||
1000 | for (i = 0; i < ncrtcs; i++) { | |
1001 | struct drm_crtc_helper_funcs *funcs; | |
1002 | struct drm_crtc *crtc = state->crtcs[i]; | |
1003 | ||
1004 | if (!crtc) | |
1005 | continue; | |
1006 | ||
1007 | funcs = crtc->helper_private; | |
1008 | ||
1009 | if (!funcs || !funcs->atomic_flush) | |
1010 | continue; | |
1011 | ||
1012 | funcs->atomic_flush(crtc); | |
1013 | } | |
1014 | } | |
1015 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1016 | ||
1017 | /** | |
1018 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1019 | * @dev: DRM device | |
1020 | * @old_state: atomic state object with old state structures | |
1021 | * | |
1022 | * This function cleans up plane state, specifically framebuffers, from the old | |
1023 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1024 | * be able to call this function. | |
1025 | * | |
1026 | * This function must also be called on the new state when the atomic update | |
1027 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1028 | */ | |
1029 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1030 | struct drm_atomic_state *old_state) | |
1031 | { | |
1032 | int nplanes = dev->mode_config.num_total_plane; | |
1033 | int i; | |
1034 | ||
1035 | for (i = 0; i < nplanes; i++) { | |
1036 | struct drm_plane_helper_funcs *funcs; | |
1037 | struct drm_plane *plane = old_state->planes[i]; | |
1038 | struct drm_framebuffer *old_fb; | |
1039 | ||
1040 | if (!plane) | |
1041 | continue; | |
1042 | ||
1043 | funcs = plane->helper_private; | |
1044 | ||
1045 | old_fb = old_state->plane_states[i]->fb; | |
1046 | ||
1047 | if (old_fb && funcs->cleanup_fb) | |
1048 | funcs->cleanup_fb(plane, old_fb); | |
1049 | } | |
1050 | } | |
1051 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1052 | ||
1053 | /** | |
1054 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
1055 | * @dev: DRM device | |
1056 | * @state: atomic state | |
1057 | * | |
1058 | * This function stores the atomic state into the current state pointers in all | |
1059 | * driver objects. It should be called after all failing steps have been done | |
1060 | * and succeeded, but before the actual hardware state is committed. | |
1061 | * | |
1062 | * For cleanup and error recovery the current state for all changed objects will | |
1063 | * be swaped into @state. | |
1064 | * | |
1065 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1066 | * | |
1067 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1068 | * | |
1069 | * 2. Do any other steps that might fail. | |
1070 | * | |
1071 | * 3. Put the staged state into the current state pointers with this function. | |
1072 | * | |
1073 | * 4. Actually commit the hardware state. | |
1074 | * | |
1075 | * 5. Call drm_atomic_helper_cleanup_planes with @state, which since step 3 | |
1076 | * contains the old state. Also do any other cleanup required with that state. | |
1077 | */ | |
1078 | void drm_atomic_helper_swap_state(struct drm_device *dev, | |
1079 | struct drm_atomic_state *state) | |
1080 | { | |
1081 | int i; | |
1082 | ||
1083 | for (i = 0; i < dev->mode_config.num_connector; i++) { | |
1084 | struct drm_connector *connector = state->connectors[i]; | |
1085 | ||
1086 | if (!connector) | |
1087 | continue; | |
1088 | ||
1089 | connector->state->state = state; | |
1090 | swap(state->connector_states[i], connector->state); | |
1091 | connector->state->state = NULL; | |
1092 | } | |
1093 | ||
1094 | for (i = 0; i < dev->mode_config.num_crtc; i++) { | |
1095 | struct drm_crtc *crtc = state->crtcs[i]; | |
1096 | ||
1097 | if (!crtc) | |
1098 | continue; | |
1099 | ||
1100 | crtc->state->state = state; | |
1101 | swap(state->crtc_states[i], crtc->state); | |
1102 | crtc->state->state = NULL; | |
1103 | } | |
1104 | ||
1105 | for (i = 0; i < dev->mode_config.num_total_plane; i++) { | |
1106 | struct drm_plane *plane = state->planes[i]; | |
1107 | ||
1108 | if (!plane) | |
1109 | continue; | |
1110 | ||
1111 | plane->state->state = state; | |
1112 | swap(state->plane_states[i], plane->state); | |
1113 | plane->state->state = NULL; | |
1114 | } | |
1115 | } | |
1116 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
1117 | |
1118 | /** | |
1119 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
1120 | * @plane: plane object to update | |
1121 | * @crtc: owning CRTC of owning plane | |
1122 | * @fb: framebuffer to flip onto plane | |
1123 | * @crtc_x: x offset of primary plane on crtc | |
1124 | * @crtc_y: y offset of primary plane on crtc | |
1125 | * @crtc_w: width of primary plane rectangle on crtc | |
1126 | * @crtc_h: height of primary plane rectangle on crtc | |
1127 | * @src_x: x offset of @fb for panning | |
1128 | * @src_y: y offset of @fb for panning | |
1129 | * @src_w: width of source rectangle in @fb | |
1130 | * @src_h: height of source rectangle in @fb | |
1131 | * | |
1132 | * Provides a default plane update handler using the atomic driver interface. | |
1133 | * | |
1134 | * RETURNS: | |
1135 | * Zero on success, error code on failure | |
1136 | */ | |
1137 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
1138 | struct drm_crtc *crtc, | |
1139 | struct drm_framebuffer *fb, | |
1140 | int crtc_x, int crtc_y, | |
1141 | unsigned int crtc_w, unsigned int crtc_h, | |
1142 | uint32_t src_x, uint32_t src_y, | |
1143 | uint32_t src_w, uint32_t src_h) | |
1144 | { | |
1145 | struct drm_atomic_state *state; | |
1146 | struct drm_plane_state *plane_state; | |
1147 | int ret = 0; | |
1148 | ||
1149 | state = drm_atomic_state_alloc(plane->dev); | |
1150 | if (!state) | |
1151 | return -ENOMEM; | |
1152 | ||
1153 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1154 | retry: | |
1155 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1156 | if (IS_ERR(plane_state)) { | |
1157 | ret = PTR_ERR(plane_state); | |
1158 | goto fail; | |
1159 | } | |
1160 | ||
1161 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); | |
1162 | if (ret != 0) | |
1163 | goto fail; | |
1164 | plane_state->fb = fb; | |
1165 | plane_state->crtc_x = crtc_x; | |
1166 | plane_state->crtc_y = crtc_y; | |
1167 | plane_state->crtc_h = crtc_h; | |
1168 | plane_state->crtc_w = crtc_w; | |
1169 | plane_state->src_x = src_x; | |
1170 | plane_state->src_y = src_y; | |
1171 | plane_state->src_h = src_h; | |
1172 | plane_state->src_w = src_w; | |
1173 | ||
1174 | ret = drm_atomic_commit(state); | |
1175 | if (ret != 0) | |
1176 | goto fail; | |
1177 | ||
1178 | /* Driver takes ownership of state on successful commit. */ | |
1179 | return 0; | |
1180 | fail: | |
1181 | if (ret == -EDEADLK) | |
1182 | goto backoff; | |
1183 | ||
1184 | drm_atomic_state_free(state); | |
1185 | ||
1186 | return ret; | |
1187 | backoff: | |
1188 | drm_atomic_legacy_backoff(state); | |
1189 | drm_atomic_state_clear(state); | |
1190 | ||
1191 | /* | |
1192 | * Someone might have exchanged the framebuffer while we dropped locks | |
1193 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1194 | * core does for us. | |
1195 | */ | |
1196 | plane->old_fb = plane->fb; | |
1197 | ||
1198 | goto retry; | |
1199 | } | |
1200 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
1201 | ||
1202 | /** | |
1203 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
1204 | * @plane: plane to disable | |
1205 | * | |
1206 | * Provides a default plane disable handler using the atomic driver interface. | |
1207 | * | |
1208 | * RETURNS: | |
1209 | * Zero on success, error code on failure | |
1210 | */ | |
1211 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
1212 | { | |
1213 | struct drm_atomic_state *state; | |
1214 | struct drm_plane_state *plane_state; | |
1215 | int ret = 0; | |
1216 | ||
1217 | state = drm_atomic_state_alloc(plane->dev); | |
1218 | if (!state) | |
1219 | return -ENOMEM; | |
1220 | ||
1221 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
1222 | retry: | |
1223 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1224 | if (IS_ERR(plane_state)) { | |
1225 | ret = PTR_ERR(plane_state); | |
1226 | goto fail; | |
1227 | } | |
1228 | ||
1229 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
1230 | if (ret != 0) | |
1231 | goto fail; | |
1232 | plane_state->fb = NULL; | |
1233 | plane_state->crtc_x = 0; | |
1234 | plane_state->crtc_y = 0; | |
1235 | plane_state->crtc_h = 0; | |
1236 | plane_state->crtc_w = 0; | |
1237 | plane_state->src_x = 0; | |
1238 | plane_state->src_y = 0; | |
1239 | plane_state->src_h = 0; | |
1240 | plane_state->src_w = 0; | |
1241 | ||
1242 | ret = drm_atomic_commit(state); | |
1243 | if (ret != 0) | |
1244 | goto fail; | |
1245 | ||
1246 | /* Driver takes ownership of state on successful commit. */ | |
1247 | return 0; | |
1248 | fail: | |
1249 | if (ret == -EDEADLK) | |
1250 | goto backoff; | |
1251 | ||
1252 | drm_atomic_state_free(state); | |
1253 | ||
1254 | return ret; | |
1255 | backoff: | |
1256 | drm_atomic_legacy_backoff(state); | |
1257 | drm_atomic_state_clear(state); | |
1258 | ||
1259 | /* | |
1260 | * Someone might have exchanged the framebuffer while we dropped locks | |
1261 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1262 | * core does for us. | |
1263 | */ | |
1264 | plane->old_fb = plane->fb; | |
1265 | ||
1266 | goto retry; | |
1267 | } | |
1268 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
1269 | ||
1270 | static int update_output_state(struct drm_atomic_state *state, | |
1271 | struct drm_mode_set *set) | |
1272 | { | |
1273 | struct drm_device *dev = set->crtc->dev; | |
1274 | struct drm_connector_state *conn_state; | |
1275 | int nconnectors = state->dev->mode_config.num_connector; | |
1276 | int ncrtcs = state->dev->mode_config.num_crtc; | |
1277 | int ret, i, j; | |
1278 | ||
1279 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
1280 | state->acquire_ctx); | |
1281 | if (ret) | |
1282 | return ret; | |
1283 | ||
1284 | /* First grab all affected connector/crtc states. */ | |
1285 | for (i = 0; i < set->num_connectors; i++) { | |
1286 | conn_state = drm_atomic_get_connector_state(state, | |
1287 | set->connectors[i]); | |
1288 | if (IS_ERR(conn_state)) | |
1289 | return PTR_ERR(conn_state); | |
1290 | } | |
1291 | ||
1292 | for (i = 0; i < ncrtcs; i++) { | |
1293 | struct drm_crtc *crtc = state->crtcs[i]; | |
1294 | ||
1295 | if (!crtc) | |
1296 | continue; | |
1297 | ||
1298 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
1299 | if (ret) | |
1300 | return ret; | |
1301 | } | |
1302 | ||
1303 | /* Then recompute connector->crtc links and crtc enabling state. */ | |
1304 | for (i = 0; i < nconnectors; i++) { | |
1305 | struct drm_connector *connector; | |
1306 | ||
1307 | connector = state->connectors[i]; | |
1308 | conn_state = state->connector_states[i]; | |
1309 | ||
1310 | if (!connector) | |
1311 | continue; | |
1312 | ||
1313 | if (conn_state->crtc == set->crtc) { | |
1314 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1315 | NULL); | |
1316 | if (ret) | |
1317 | return ret; | |
1318 | } | |
1319 | ||
1320 | for (j = 0; j < set->num_connectors; j++) { | |
1321 | if (set->connectors[j] == connector) { | |
1322 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1323 | set->crtc); | |
1324 | if (ret) | |
1325 | return ret; | |
1326 | break; | |
1327 | } | |
1328 | } | |
1329 | } | |
1330 | ||
1331 | for (i = 0; i < ncrtcs; i++) { | |
1332 | struct drm_crtc *crtc = state->crtcs[i]; | |
1333 | struct drm_crtc_state *crtc_state = state->crtc_states[i]; | |
1334 | ||
1335 | if (!crtc) | |
1336 | continue; | |
1337 | ||
1338 | /* Don't update ->enable for the CRTC in the set_config request, | |
1339 | * since a mismatch would indicate a bug in the upper layers. | |
1340 | * The actual modeset code later on will catch any | |
1341 | * inconsistencies here. */ | |
1342 | if (crtc == set->crtc) | |
1343 | continue; | |
1344 | ||
1345 | crtc_state->enable = | |
1346 | drm_atomic_connectors_for_crtc(state, crtc); | |
1347 | } | |
1348 | ||
1349 | return 0; | |
1350 | } | |
1351 | ||
1352 | /** | |
1353 | * drm_atomic_helper_set_config - set a new config from userspace | |
1354 | * @set: mode set configuration | |
1355 | * | |
1356 | * Provides a default crtc set_config handler using the atomic driver interface. | |
1357 | * | |
1358 | * Returns: | |
1359 | * Returns 0 on success, negative errno numbers on failure. | |
1360 | */ | |
1361 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
1362 | { | |
1363 | struct drm_atomic_state *state; | |
1364 | struct drm_crtc *crtc = set->crtc; | |
1365 | struct drm_crtc_state *crtc_state; | |
1366 | struct drm_plane_state *primary_state; | |
1367 | int ret = 0; | |
1368 | ||
1369 | state = drm_atomic_state_alloc(crtc->dev); | |
1370 | if (!state) | |
1371 | return -ENOMEM; | |
1372 | ||
1373 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1374 | retry: | |
1375 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1376 | if (IS_ERR(crtc_state)) { | |
1377 | ret = PTR_ERR(crtc_state); | |
1378 | goto fail; | |
1379 | } | |
1380 | ||
1381 | if (!set->mode) { | |
1382 | WARN_ON(set->fb); | |
1383 | WARN_ON(set->num_connectors); | |
1384 | ||
1385 | crtc_state->enable = false; | |
1386 | goto commit; | |
1387 | } | |
1388 | ||
1389 | WARN_ON(!set->fb); | |
1390 | WARN_ON(!set->num_connectors); | |
1391 | ||
1392 | crtc_state->enable = true; | |
1393 | drm_mode_copy(&crtc_state->mode, set->mode); | |
1394 | ||
1395 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); | |
1396 | if (IS_ERR(primary_state)) { | |
1397 | ret = PTR_ERR(primary_state); | |
1398 | goto fail; | |
1399 | } | |
1400 | ||
1401 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); | |
1402 | if (ret != 0) | |
1403 | goto fail; | |
1404 | primary_state->fb = set->fb; | |
1405 | primary_state->crtc_x = 0; | |
1406 | primary_state->crtc_y = 0; | |
1407 | primary_state->crtc_h = set->mode->vdisplay; | |
1408 | primary_state->crtc_w = set->mode->hdisplay; | |
1409 | primary_state->src_x = set->x << 16; | |
1410 | primary_state->src_y = set->y << 16; | |
1411 | primary_state->src_h = set->mode->vdisplay << 16; | |
1412 | primary_state->src_w = set->mode->hdisplay << 16; | |
1413 | ||
1414 | commit: | |
1415 | ret = update_output_state(state, set); | |
1416 | if (ret) | |
1417 | goto fail; | |
1418 | ||
1419 | ret = drm_atomic_commit(state); | |
1420 | if (ret != 0) | |
1421 | goto fail; | |
1422 | ||
1423 | /* Driver takes ownership of state on successful commit. */ | |
1424 | return 0; | |
1425 | fail: | |
1426 | if (ret == -EDEADLK) | |
1427 | goto backoff; | |
1428 | ||
1429 | drm_atomic_state_free(state); | |
1430 | ||
1431 | return ret; | |
1432 | backoff: | |
1433 | drm_atomic_legacy_backoff(state); | |
1434 | drm_atomic_state_clear(state); | |
1435 | ||
1436 | /* | |
1437 | * Someone might have exchanged the framebuffer while we dropped locks | |
1438 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1439 | * core does for us. | |
1440 | */ | |
1441 | crtc->primary->old_fb = crtc->primary->fb; | |
1442 | ||
1443 | goto retry; | |
1444 | } | |
1445 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
1446 | ||
1447 | /** | |
1448 | * drm_atomic_helper_crtc_set_property - helper for crtc prorties | |
1449 | * @crtc: DRM crtc | |
1450 | * @property: DRM property | |
1451 | * @val: value of property | |
1452 | * | |
1453 | * Provides a default plane disablle handler using the atomic driver interface. | |
1454 | * | |
1455 | * RETURNS: | |
1456 | * Zero on success, error code on failure | |
1457 | */ | |
1458 | int | |
1459 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
1460 | struct drm_property *property, | |
1461 | uint64_t val) | |
1462 | { | |
1463 | struct drm_atomic_state *state; | |
1464 | struct drm_crtc_state *crtc_state; | |
1465 | int ret = 0; | |
1466 | ||
1467 | state = drm_atomic_state_alloc(crtc->dev); | |
1468 | if (!state) | |
1469 | return -ENOMEM; | |
1470 | ||
1471 | /* ->set_property is always called with all locks held. */ | |
1472 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
1473 | retry: | |
1474 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1475 | if (IS_ERR(crtc_state)) { | |
1476 | ret = PTR_ERR(crtc_state); | |
1477 | goto fail; | |
1478 | } | |
1479 | ||
1480 | ret = crtc->funcs->atomic_set_property(crtc, crtc_state, | |
1481 | property, val); | |
1482 | if (ret) | |
1483 | goto fail; | |
1484 | ||
1485 | ret = drm_atomic_commit(state); | |
1486 | if (ret != 0) | |
1487 | goto fail; | |
1488 | ||
1489 | /* Driver takes ownership of state on successful commit. */ | |
1490 | return 0; | |
1491 | fail: | |
1492 | if (ret == -EDEADLK) | |
1493 | goto backoff; | |
1494 | ||
1495 | drm_atomic_state_free(state); | |
1496 | ||
1497 | return ret; | |
1498 | backoff: | |
1499 | drm_atomic_legacy_backoff(state); | |
1500 | drm_atomic_state_clear(state); | |
1501 | ||
1502 | goto retry; | |
1503 | } | |
1504 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
1505 | ||
1506 | /** | |
1507 | * drm_atomic_helper_plane_set_property - helper for plane prorties | |
1508 | * @plane: DRM plane | |
1509 | * @property: DRM property | |
1510 | * @val: value of property | |
1511 | * | |
1512 | * Provides a default plane disable handler using the atomic driver interface. | |
1513 | * | |
1514 | * RETURNS: | |
1515 | * Zero on success, error code on failure | |
1516 | */ | |
1517 | int | |
1518 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
1519 | struct drm_property *property, | |
1520 | uint64_t val) | |
1521 | { | |
1522 | struct drm_atomic_state *state; | |
1523 | struct drm_plane_state *plane_state; | |
1524 | int ret = 0; | |
1525 | ||
1526 | state = drm_atomic_state_alloc(plane->dev); | |
1527 | if (!state) | |
1528 | return -ENOMEM; | |
1529 | ||
1530 | /* ->set_property is always called with all locks held. */ | |
1531 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
1532 | retry: | |
1533 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1534 | if (IS_ERR(plane_state)) { | |
1535 | ret = PTR_ERR(plane_state); | |
1536 | goto fail; | |
1537 | } | |
1538 | ||
1539 | ret = plane->funcs->atomic_set_property(plane, plane_state, | |
1540 | property, val); | |
1541 | if (ret) | |
1542 | goto fail; | |
1543 | ||
1544 | ret = drm_atomic_commit(state); | |
1545 | if (ret != 0) | |
1546 | goto fail; | |
1547 | ||
1548 | /* Driver takes ownership of state on successful commit. */ | |
1549 | return 0; | |
1550 | fail: | |
1551 | if (ret == -EDEADLK) | |
1552 | goto backoff; | |
1553 | ||
1554 | drm_atomic_state_free(state); | |
1555 | ||
1556 | return ret; | |
1557 | backoff: | |
1558 | drm_atomic_legacy_backoff(state); | |
1559 | drm_atomic_state_clear(state); | |
1560 | ||
1561 | goto retry; | |
1562 | } | |
1563 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
1564 | ||
1565 | /** | |
1566 | * drm_atomic_helper_connector_set_property - helper for connector prorties | |
1567 | * @connector: DRM connector | |
1568 | * @property: DRM property | |
1569 | * @val: value of property | |
1570 | * | |
1571 | * Provides a default plane disablle handler using the atomic driver interface. | |
1572 | * | |
1573 | * RETURNS: | |
1574 | * Zero on success, error code on failure | |
1575 | */ | |
1576 | int | |
1577 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
1578 | struct drm_property *property, | |
1579 | uint64_t val) | |
1580 | { | |
1581 | struct drm_atomic_state *state; | |
1582 | struct drm_connector_state *connector_state; | |
1583 | int ret = 0; | |
1584 | ||
1585 | state = drm_atomic_state_alloc(connector->dev); | |
1586 | if (!state) | |
1587 | return -ENOMEM; | |
1588 | ||
1589 | /* ->set_property is always called with all locks held. */ | |
1590 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
1591 | retry: | |
1592 | connector_state = drm_atomic_get_connector_state(state, connector); | |
1593 | if (IS_ERR(connector_state)) { | |
1594 | ret = PTR_ERR(connector_state); | |
1595 | goto fail; | |
1596 | } | |
1597 | ||
1598 | ret = connector->funcs->atomic_set_property(connector, connector_state, | |
1599 | property, val); | |
1600 | if (ret) | |
1601 | goto fail; | |
1602 | ||
1603 | ret = drm_atomic_commit(state); | |
1604 | if (ret != 0) | |
1605 | goto fail; | |
1606 | ||
1607 | /* Driver takes ownership of state on successful commit. */ | |
1608 | return 0; | |
1609 | fail: | |
1610 | if (ret == -EDEADLK) | |
1611 | goto backoff; | |
1612 | ||
1613 | drm_atomic_state_free(state); | |
1614 | ||
1615 | return ret; | |
1616 | backoff: | |
1617 | drm_atomic_legacy_backoff(state); | |
1618 | drm_atomic_state_clear(state); | |
1619 | ||
1620 | goto retry; | |
1621 | } | |
1622 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 DV |
1623 | |
1624 | /** | |
1625 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
1626 | * @crtc: DRM crtc | |
1627 | * @fb: DRM framebuffer | |
1628 | * @event: optional DRM event to signal upon completion | |
1629 | * @flags: flip flags for non-vblank sync'ed updates | |
1630 | * | |
1631 | * Provides a default page flip implementation using the atomic driver interface. | |
1632 | * | |
1633 | * Note that for now so called async page flips (i.e. updates which are not | |
1634 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
1635 | * no provisions for this yet. | |
1636 | * | |
1637 | * Returns: | |
1638 | * Returns 0 on success, negative errno numbers on failure. | |
1639 | */ | |
1640 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
1641 | struct drm_framebuffer *fb, | |
1642 | struct drm_pending_vblank_event *event, | |
1643 | uint32_t flags) | |
1644 | { | |
1645 | struct drm_plane *plane = crtc->primary; | |
1646 | struct drm_atomic_state *state; | |
1647 | struct drm_plane_state *plane_state; | |
1648 | struct drm_crtc_state *crtc_state; | |
1649 | int ret = 0; | |
1650 | ||
1651 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
1652 | return -EINVAL; | |
1653 | ||
1654 | state = drm_atomic_state_alloc(plane->dev); | |
1655 | if (!state) | |
1656 | return -ENOMEM; | |
1657 | ||
1658 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1659 | retry: | |
1660 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1661 | if (IS_ERR(crtc_state)) { | |
1662 | ret = PTR_ERR(crtc_state); | |
1663 | goto fail; | |
1664 | } | |
1665 | crtc_state->event = event; | |
1666 | ||
1667 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1668 | if (IS_ERR(plane_state)) { | |
1669 | ret = PTR_ERR(plane_state); | |
1670 | goto fail; | |
1671 | } | |
1672 | ||
1673 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); | |
1674 | if (ret != 0) | |
1675 | goto fail; | |
1676 | plane_state->fb = fb; | |
1677 | ||
1678 | ret = drm_atomic_async_commit(state); | |
1679 | if (ret != 0) | |
1680 | goto fail; | |
1681 | ||
1682 | /* TODO: ->page_flip is the only driver callback where the core | |
1683 | * doesn't update plane->fb. For now patch it up here. */ | |
1684 | plane->fb = plane->state->fb; | |
1685 | ||
1686 | /* Driver takes ownership of state on successful async commit. */ | |
1687 | return 0; | |
1688 | fail: | |
1689 | if (ret == -EDEADLK) | |
1690 | goto backoff; | |
1691 | ||
1692 | drm_atomic_state_free(state); | |
1693 | ||
1694 | return ret; | |
1695 | backoff: | |
1696 | drm_atomic_legacy_backoff(state); | |
1697 | drm_atomic_state_clear(state); | |
1698 | ||
1699 | /* | |
1700 | * Someone might have exchanged the framebuffer while we dropped locks | |
1701 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1702 | * core does for us. | |
1703 | */ | |
1704 | plane->old_fb = plane->fb; | |
1705 | ||
1706 | goto retry; | |
1707 | } | |
1708 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); |