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