]>
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 | 34 | |
3150c7d0 DV |
35 | /** |
36 | * DOC: overview | |
37 | * | |
38 | * This helper library provides implementations of check and commit functions on | |
39 | * top of the CRTC modeset helper callbacks and the plane helper callbacks. It | |
40 | * also provides convenience implementations for the atomic state handling | |
41 | * callbacks for drivers which don't need to subclass the drm core structures to | |
42 | * add their own additional internal state. | |
43 | * | |
44 | * This library also provides default implementations for the check callback in | |
45 | * drm_atomic_helper_check and for the commit callback with | |
46 | * drm_atomic_helper_commit. But the individual stages and callbacks are expose | |
47 | * to allow drivers to mix and match and e.g. use the plane helpers only | |
48 | * together with a driver private modeset implementation. | |
49 | * | |
50 | * This library also provides implementations for all the legacy driver | |
51 | * interfaces on top of the atomic interface. See drm_atomic_helper_set_config, | |
52 | * drm_atomic_helper_disable_plane, drm_atomic_helper_disable_plane and the | |
53 | * various functions to implement set_property callbacks. New drivers must not | |
54 | * implement these functions themselves but must use the provided helpers. | |
55 | */ | |
c2fcd274 DV |
56 | static void |
57 | drm_atomic_helper_plane_changed(struct drm_atomic_state *state, | |
58 | struct drm_plane_state *plane_state, | |
59 | struct drm_plane *plane) | |
60 | { | |
61 | struct drm_crtc_state *crtc_state; | |
62 | ||
63 | if (plane->state->crtc) { | |
64 | crtc_state = state->crtc_states[drm_crtc_index(plane->crtc)]; | |
65 | ||
66 | if (WARN_ON(!crtc_state)) | |
67 | return; | |
68 | ||
69 | crtc_state->planes_changed = true; | |
70 | } | |
71 | ||
72 | if (plane_state->crtc) { | |
73 | crtc_state = | |
74 | state->crtc_states[drm_crtc_index(plane_state->crtc)]; | |
75 | ||
76 | if (WARN_ON(!crtc_state)) | |
77 | return; | |
78 | ||
79 | crtc_state->planes_changed = true; | |
80 | } | |
81 | } | |
82 | ||
623369e5 DV |
83 | static struct drm_crtc * |
84 | get_current_crtc_for_encoder(struct drm_device *dev, | |
85 | struct drm_encoder *encoder) | |
86 | { | |
87 | struct drm_mode_config *config = &dev->mode_config; | |
88 | struct drm_connector *connector; | |
89 | ||
90 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
91 | ||
92 | list_for_each_entry(connector, &config->connector_list, head) { | |
93 | if (connector->state->best_encoder != encoder) | |
94 | continue; | |
95 | ||
96 | return connector->state->crtc; | |
97 | } | |
98 | ||
99 | return NULL; | |
100 | } | |
101 | ||
102 | static int | |
103 | steal_encoder(struct drm_atomic_state *state, | |
104 | struct drm_encoder *encoder, | |
105 | struct drm_crtc *encoder_crtc) | |
106 | { | |
107 | struct drm_mode_config *config = &state->dev->mode_config; | |
108 | struct drm_crtc_state *crtc_state; | |
109 | struct drm_connector *connector; | |
110 | struct drm_connector_state *connector_state; | |
042652ed | 111 | int ret; |
623369e5 DV |
112 | |
113 | /* | |
114 | * We can only steal an encoder coming from a connector, which means we | |
115 | * must already hold the connection_mutex. | |
116 | */ | |
117 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
118 | ||
119 | DRM_DEBUG_KMS("[ENCODER:%d:%s] in use on [CRTC:%d], stealing it\n", | |
120 | encoder->base.id, encoder->name, | |
121 | encoder_crtc->base.id); | |
122 | ||
123 | crtc_state = drm_atomic_get_crtc_state(state, encoder_crtc); | |
124 | if (IS_ERR(crtc_state)) | |
125 | return PTR_ERR(crtc_state); | |
126 | ||
127 | crtc_state->mode_changed = true; | |
128 | ||
129 | list_for_each_entry(connector, &config->connector_list, head) { | |
130 | if (connector->state->best_encoder != encoder) | |
131 | continue; | |
132 | ||
133 | DRM_DEBUG_KMS("Stealing encoder from [CONNECTOR:%d:%s]\n", | |
134 | connector->base.id, | |
135 | connector->name); | |
136 | ||
137 | connector_state = drm_atomic_get_connector_state(state, | |
138 | connector); | |
139 | if (IS_ERR(connector_state)) | |
140 | return PTR_ERR(connector_state); | |
141 | ||
042652ed DV |
142 | ret = drm_atomic_set_crtc_for_connector(connector_state, NULL); |
143 | if (ret) | |
144 | return ret; | |
623369e5 DV |
145 | connector_state->best_encoder = NULL; |
146 | } | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | static int | |
152 | update_connector_routing(struct drm_atomic_state *state, int conn_idx) | |
153 | { | |
154 | struct drm_connector_helper_funcs *funcs; | |
155 | struct drm_encoder *new_encoder; | |
156 | struct drm_crtc *encoder_crtc; | |
157 | struct drm_connector *connector; | |
158 | struct drm_connector_state *connector_state; | |
159 | struct drm_crtc_state *crtc_state; | |
160 | int idx, ret; | |
161 | ||
162 | connector = state->connectors[conn_idx]; | |
163 | connector_state = state->connector_states[conn_idx]; | |
164 | ||
165 | if (!connector) | |
166 | return 0; | |
167 | ||
168 | DRM_DEBUG_KMS("Updating routing for [CONNECTOR:%d:%s]\n", | |
169 | connector->base.id, | |
170 | connector->name); | |
171 | ||
172 | if (connector->state->crtc != connector_state->crtc) { | |
173 | if (connector->state->crtc) { | |
174 | idx = drm_crtc_index(connector->state->crtc); | |
175 | ||
176 | crtc_state = state->crtc_states[idx]; | |
177 | crtc_state->mode_changed = true; | |
178 | } | |
179 | ||
180 | if (connector_state->crtc) { | |
181 | idx = drm_crtc_index(connector_state->crtc); | |
182 | ||
183 | crtc_state = state->crtc_states[idx]; | |
184 | crtc_state->mode_changed = true; | |
185 | } | |
186 | } | |
187 | ||
188 | if (!connector_state->crtc) { | |
189 | DRM_DEBUG_KMS("Disabling [CONNECTOR:%d:%s]\n", | |
190 | connector->base.id, | |
191 | connector->name); | |
192 | ||
193 | connector_state->best_encoder = NULL; | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | funcs = connector->helper_private; | |
199 | new_encoder = funcs->best_encoder(connector); | |
200 | ||
201 | if (!new_encoder) { | |
202 | DRM_DEBUG_KMS("No suitable encoder found for [CONNECTOR:%d:%s]\n", | |
203 | connector->base.id, | |
204 | connector->name); | |
205 | return -EINVAL; | |
206 | } | |
207 | ||
208 | if (new_encoder == connector_state->best_encoder) { | |
209 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d]\n", | |
210 | connector->base.id, | |
211 | connector->name, | |
212 | new_encoder->base.id, | |
213 | new_encoder->name, | |
214 | connector_state->crtc->base.id); | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
219 | encoder_crtc = get_current_crtc_for_encoder(state->dev, | |
220 | new_encoder); | |
221 | ||
222 | if (encoder_crtc) { | |
223 | ret = steal_encoder(state, new_encoder, encoder_crtc); | |
224 | if (ret) { | |
225 | DRM_DEBUG_KMS("Encoder stealing failed for [CONNECTOR:%d:%s]\n", | |
226 | connector->base.id, | |
227 | connector->name); | |
228 | return ret; | |
229 | } | |
230 | } | |
231 | ||
232 | connector_state->best_encoder = new_encoder; | |
233 | idx = drm_crtc_index(connector_state->crtc); | |
234 | ||
235 | crtc_state = state->crtc_states[idx]; | |
236 | crtc_state->mode_changed = true; | |
237 | ||
238 | DRM_DEBUG_KMS("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d]\n", | |
239 | connector->base.id, | |
240 | connector->name, | |
241 | new_encoder->base.id, | |
242 | new_encoder->name, | |
243 | connector_state->crtc->base.id); | |
244 | ||
245 | return 0; | |
246 | } | |
247 | ||
248 | static int | |
249 | mode_fixup(struct drm_atomic_state *state) | |
250 | { | |
251 | int ncrtcs = state->dev->mode_config.num_crtc; | |
252 | int nconnectors = state->dev->mode_config.num_connector; | |
253 | struct drm_crtc_state *crtc_state; | |
254 | struct drm_connector_state *conn_state; | |
255 | int i; | |
256 | bool ret; | |
257 | ||
258 | for (i = 0; i < ncrtcs; i++) { | |
259 | crtc_state = state->crtc_states[i]; | |
260 | ||
261 | if (!crtc_state || !crtc_state->mode_changed) | |
262 | continue; | |
263 | ||
264 | drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); | |
265 | } | |
266 | ||
267 | for (i = 0; i < nconnectors; i++) { | |
268 | struct drm_encoder_helper_funcs *funcs; | |
269 | struct drm_encoder *encoder; | |
270 | ||
271 | conn_state = state->connector_states[i]; | |
272 | ||
273 | if (!conn_state) | |
274 | continue; | |
275 | ||
276 | WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); | |
277 | ||
278 | if (!conn_state->crtc || !conn_state->best_encoder) | |
279 | continue; | |
280 | ||
281 | crtc_state = | |
282 | state->crtc_states[drm_crtc_index(conn_state->crtc)]; | |
283 | ||
284 | /* | |
285 | * Each encoder has at most one connector (since we always steal | |
286 | * it away), so we won't call ->mode_fixup twice. | |
287 | */ | |
288 | encoder = conn_state->best_encoder; | |
289 | funcs = encoder->helper_private; | |
290 | ||
291 | if (encoder->bridge && encoder->bridge->funcs->mode_fixup) { | |
292 | ret = encoder->bridge->funcs->mode_fixup( | |
293 | encoder->bridge, &crtc_state->mode, | |
294 | &crtc_state->adjusted_mode); | |
295 | if (!ret) { | |
296 | DRM_DEBUG_KMS("Bridge fixup failed\n"); | |
297 | return -EINVAL; | |
298 | } | |
299 | } | |
300 | ||
301 | ||
302 | ret = funcs->mode_fixup(encoder, &crtc_state->mode, | |
303 | &crtc_state->adjusted_mode); | |
304 | if (!ret) { | |
305 | DRM_DEBUG_KMS("[ENCODER:%d:%s] fixup failed\n", | |
306 | encoder->base.id, encoder->name); | |
307 | return -EINVAL; | |
308 | } | |
309 | } | |
310 | ||
311 | for (i = 0; i < ncrtcs; i++) { | |
312 | struct drm_crtc_helper_funcs *funcs; | |
313 | struct drm_crtc *crtc; | |
314 | ||
315 | crtc_state = state->crtc_states[i]; | |
316 | crtc = state->crtcs[i]; | |
317 | ||
318 | if (!crtc_state || !crtc_state->mode_changed) | |
319 | continue; | |
320 | ||
321 | funcs = crtc->helper_private; | |
322 | ret = funcs->mode_fixup(crtc, &crtc_state->mode, | |
323 | &crtc_state->adjusted_mode); | |
324 | if (!ret) { | |
325 | DRM_DEBUG_KMS("[CRTC:%d] fixup failed\n", | |
326 | crtc->base.id); | |
327 | return -EINVAL; | |
328 | } | |
329 | } | |
330 | ||
331 | return 0; | |
332 | } | |
333 | ||
334 | static int | |
335 | drm_atomic_helper_check_prepare(struct drm_device *dev, | |
336 | struct drm_atomic_state *state) | |
337 | { | |
338 | int ncrtcs = dev->mode_config.num_crtc; | |
339 | int nconnectors = dev->mode_config.num_connector; | |
340 | struct drm_crtc *crtc; | |
341 | struct drm_crtc_state *crtc_state; | |
342 | int i, ret; | |
343 | ||
344 | for (i = 0; i < ncrtcs; i++) { | |
345 | crtc = state->crtcs[i]; | |
346 | crtc_state = state->crtc_states[i]; | |
347 | ||
348 | if (!crtc) | |
349 | continue; | |
350 | ||
351 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { | |
352 | DRM_DEBUG_KMS("[CRTC:%d] mode changed\n", | |
353 | crtc->base.id); | |
354 | crtc_state->mode_changed = true; | |
355 | } | |
356 | ||
357 | if (crtc->state->enable != crtc_state->enable) { | |
358 | DRM_DEBUG_KMS("[CRTC:%d] enable changed\n", | |
359 | crtc->base.id); | |
360 | crtc_state->mode_changed = true; | |
361 | } | |
362 | } | |
363 | ||
364 | for (i = 0; i < nconnectors; i++) { | |
365 | /* | |
366 | * This only sets crtc->mode_changed for routing changes, | |
367 | * drivers must set crtc->mode_changed themselves when connector | |
368 | * properties need to be updated. | |
369 | */ | |
370 | ret = update_connector_routing(state, i); | |
371 | if (ret) | |
372 | return ret; | |
373 | } | |
374 | ||
375 | /* | |
376 | * After all the routing has been prepared we need to add in any | |
377 | * connector which is itself unchanged, but who's crtc changes it's | |
378 | * configuration. This must be done before calling mode_fixup in case a | |
379 | * crtc only changed its mode but has the same set of connectors. | |
380 | */ | |
381 | for (i = 0; i < ncrtcs; i++) { | |
382 | int num_connectors; | |
383 | ||
384 | crtc = state->crtcs[i]; | |
385 | crtc_state = state->crtc_states[i]; | |
386 | ||
387 | if (!crtc || !crtc_state->mode_changed) | |
388 | continue; | |
389 | ||
390 | DRM_DEBUG_KMS("[CRTC:%d] needs full modeset, enable: %c\n", | |
391 | crtc->base.id, | |
392 | crtc_state->enable ? 'y' : 'n'); | |
393 | ||
394 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
395 | if (ret != 0) | |
396 | return ret; | |
397 | ||
398 | num_connectors = drm_atomic_connectors_for_crtc(state, | |
399 | crtc); | |
400 | ||
401 | if (crtc_state->enable != !!num_connectors) { | |
402 | DRM_DEBUG_KMS("[CRTC:%d] enabled/connectors mismatch\n", | |
403 | crtc->base.id); | |
404 | ||
405 | return -EINVAL; | |
406 | } | |
407 | } | |
408 | ||
409 | return mode_fixup(state); | |
410 | } | |
411 | ||
c2fcd274 DV |
412 | /** |
413 | * drm_atomic_helper_check - validate state object | |
414 | * @dev: DRM device | |
415 | * @state: the driver state object | |
416 | * | |
417 | * Check the state object to see if the requested state is physically possible. | |
418 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
419 | * checking that a driver needs it can simply wrap that around this function. | |
420 | * Drivers without such needs can directly use this as their ->atomic_check() | |
421 | * callback. | |
422 | * | |
423 | * RETURNS | |
424 | * Zero for success or -errno | |
425 | */ | |
426 | int drm_atomic_helper_check(struct drm_device *dev, | |
427 | struct drm_atomic_state *state) | |
428 | { | |
429 | int nplanes = dev->mode_config.num_total_plane; | |
430 | int ncrtcs = dev->mode_config.num_crtc; | |
431 | int i, ret = 0; | |
432 | ||
623369e5 DV |
433 | ret = drm_atomic_helper_check_prepare(dev, state); |
434 | if (ret) | |
435 | return ret; | |
436 | ||
c2fcd274 DV |
437 | for (i = 0; i < nplanes; i++) { |
438 | struct drm_plane_helper_funcs *funcs; | |
439 | struct drm_plane *plane = state->planes[i]; | |
440 | struct drm_plane_state *plane_state = state->plane_states[i]; | |
441 | ||
442 | if (!plane) | |
443 | continue; | |
444 | ||
445 | funcs = plane->helper_private; | |
446 | ||
447 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
448 | ||
449 | if (!funcs || !funcs->atomic_check) | |
450 | continue; | |
451 | ||
452 | ret = funcs->atomic_check(plane, plane_state); | |
453 | if (ret) { | |
454 | DRM_DEBUG_KMS("[PLANE:%d] atomic check failed\n", | |
455 | plane->base.id); | |
456 | return ret; | |
457 | } | |
458 | } | |
459 | ||
460 | for (i = 0; i < ncrtcs; i++) { | |
461 | struct drm_crtc_helper_funcs *funcs; | |
462 | struct drm_crtc *crtc = state->crtcs[i]; | |
463 | ||
464 | if (!crtc) | |
465 | continue; | |
466 | ||
467 | funcs = crtc->helper_private; | |
468 | ||
469 | if (!funcs || !funcs->atomic_check) | |
470 | continue; | |
471 | ||
472 | ret = funcs->atomic_check(crtc, state->crtc_states[i]); | |
473 | if (ret) { | |
474 | DRM_DEBUG_KMS("[CRTC:%d] atomic check failed\n", | |
475 | crtc->base.id); | |
476 | return ret; | |
477 | } | |
478 | } | |
479 | ||
480 | return ret; | |
481 | } | |
482 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
483 | ||
623369e5 DV |
484 | static void |
485 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
486 | { | |
487 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
488 | int nconnectors = old_state->dev->mode_config.num_connector; | |
489 | int i; | |
490 | ||
491 | for (i = 0; i < nconnectors; i++) { | |
492 | struct drm_connector_state *old_conn_state; | |
493 | struct drm_connector *connector; | |
494 | struct drm_encoder_helper_funcs *funcs; | |
495 | struct drm_encoder *encoder; | |
496 | ||
497 | old_conn_state = old_state->connector_states[i]; | |
498 | connector = old_state->connectors[i]; | |
499 | ||
500 | /* Shut down everything that's in the changeset and currently | |
501 | * still on. So need to check the old, saved state. */ | |
502 | if (!old_conn_state || !old_conn_state->crtc) | |
503 | continue; | |
504 | ||
505 | encoder = connector->state->best_encoder; | |
506 | ||
507 | if (!encoder) | |
508 | continue; | |
509 | ||
510 | funcs = encoder->helper_private; | |
511 | ||
512 | /* | |
513 | * Each encoder has at most one connector (since we always steal | |
514 | * it away), so we won't call call disable hooks twice. | |
515 | */ | |
516 | if (encoder->bridge) | |
517 | encoder->bridge->funcs->disable(encoder->bridge); | |
518 | ||
519 | /* Right function depends upon target state. */ | |
520 | if (connector->state->crtc) | |
521 | funcs->prepare(encoder); | |
522 | else if (funcs->disable) | |
523 | funcs->disable(encoder); | |
524 | else | |
525 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
526 | ||
527 | if (encoder->bridge) | |
528 | encoder->bridge->funcs->post_disable(encoder->bridge); | |
529 | } | |
530 | ||
531 | for (i = 0; i < ncrtcs; i++) { | |
532 | struct drm_crtc_helper_funcs *funcs; | |
533 | struct drm_crtc *crtc; | |
534 | ||
535 | crtc = old_state->crtcs[i]; | |
536 | ||
537 | /* Shut down everything that needs a full modeset. */ | |
538 | if (!crtc || !crtc->state->mode_changed) | |
539 | continue; | |
540 | ||
541 | funcs = crtc->helper_private; | |
542 | ||
543 | /* Right function depends upon target state. */ | |
544 | if (crtc->state->enable) | |
545 | funcs->prepare(crtc); | |
546 | else if (funcs->disable) | |
547 | funcs->disable(crtc); | |
548 | else | |
549 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
550 | } | |
551 | } | |
552 | ||
553 | static void | |
554 | set_routing_links(struct drm_device *dev, struct drm_atomic_state *old_state) | |
555 | { | |
556 | int nconnectors = dev->mode_config.num_connector; | |
557 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
558 | int i; | |
559 | ||
560 | /* clear out existing links */ | |
561 | for (i = 0; i < nconnectors; i++) { | |
562 | struct drm_connector *connector; | |
563 | ||
564 | connector = old_state->connectors[i]; | |
565 | ||
566 | if (!connector || !connector->encoder) | |
567 | continue; | |
568 | ||
569 | WARN_ON(!connector->encoder->crtc); | |
570 | ||
571 | connector->encoder->crtc = NULL; | |
572 | connector->encoder = NULL; | |
573 | } | |
574 | ||
575 | /* set new links */ | |
576 | for (i = 0; i < nconnectors; i++) { | |
577 | struct drm_connector *connector; | |
578 | ||
579 | connector = old_state->connectors[i]; | |
580 | ||
581 | if (!connector || !connector->state->crtc) | |
582 | continue; | |
583 | ||
584 | if (WARN_ON(!connector->state->best_encoder)) | |
585 | continue; | |
586 | ||
587 | connector->encoder = connector->state->best_encoder; | |
588 | connector->encoder->crtc = connector->state->crtc; | |
589 | } | |
590 | ||
591 | /* set legacy state in the crtc structure */ | |
592 | for (i = 0; i < ncrtcs; i++) { | |
593 | struct drm_crtc *crtc; | |
594 | ||
595 | crtc = old_state->crtcs[i]; | |
596 | ||
597 | if (!crtc) | |
598 | continue; | |
599 | ||
600 | crtc->mode = crtc->state->mode; | |
601 | crtc->enabled = crtc->state->enable; | |
602 | crtc->x = crtc->primary->state->src_x >> 16; | |
603 | crtc->y = crtc->primary->state->src_y >> 16; | |
604 | } | |
605 | } | |
606 | ||
607 | static void | |
608 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
609 | { | |
610 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
611 | int nconnectors = old_state->dev->mode_config.num_connector; | |
612 | int i; | |
613 | ||
614 | for (i = 0; i < ncrtcs; i++) { | |
615 | struct drm_crtc_helper_funcs *funcs; | |
616 | struct drm_crtc *crtc; | |
617 | ||
618 | crtc = old_state->crtcs[i]; | |
619 | ||
620 | if (!crtc || !crtc->state->mode_changed) | |
621 | continue; | |
622 | ||
623 | funcs = crtc->helper_private; | |
624 | ||
625 | if (crtc->state->enable) | |
626 | funcs->mode_set_nofb(crtc); | |
627 | } | |
628 | ||
629 | for (i = 0; i < nconnectors; i++) { | |
630 | struct drm_connector *connector; | |
631 | struct drm_crtc_state *new_crtc_state; | |
632 | struct drm_encoder_helper_funcs *funcs; | |
633 | struct drm_encoder *encoder; | |
634 | struct drm_display_mode *mode, *adjusted_mode; | |
635 | ||
636 | connector = old_state->connectors[i]; | |
637 | ||
638 | if (!connector || !connector->state->best_encoder) | |
639 | continue; | |
640 | ||
641 | encoder = connector->state->best_encoder; | |
642 | funcs = encoder->helper_private; | |
643 | new_crtc_state = connector->state->crtc->state; | |
644 | mode = &new_crtc_state->mode; | |
645 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
646 | ||
647 | /* | |
648 | * Each encoder has at most one connector (since we always steal | |
649 | * it away), so we won't call call mode_set hooks twice. | |
650 | */ | |
651 | funcs->mode_set(encoder, mode, adjusted_mode); | |
652 | ||
653 | if (encoder->bridge && encoder->bridge->funcs->mode_set) | |
654 | encoder->bridge->funcs->mode_set(encoder->bridge, | |
655 | mode, adjusted_mode); | |
656 | } | |
657 | } | |
658 | ||
659 | /** | |
660 | * drm_atomic_helper_commit_pre_planes - modeset commit before plane updates | |
661 | * @dev: DRM device | |
662 | * @state: atomic state | |
663 | * | |
664 | * This function commits the modeset changes that need to be committed before | |
665 | * updating planes. It shuts down all the outputs that need to be shut down and | |
666 | * prepares them (if required) with the new mode. | |
667 | */ | |
668 | void drm_atomic_helper_commit_pre_planes(struct drm_device *dev, | |
669 | struct drm_atomic_state *state) | |
670 | { | |
671 | disable_outputs(dev, state); | |
672 | set_routing_links(dev, state); | |
673 | crtc_set_mode(dev, state); | |
674 | } | |
675 | EXPORT_SYMBOL(drm_atomic_helper_commit_pre_planes); | |
676 | ||
677 | /** | |
678 | * drm_atomic_helper_commit_post_planes - modeset commit after plane updates | |
679 | * @dev: DRM device | |
680 | * @old_state: atomic state object with old state structures | |
681 | * | |
682 | * This function commits the modeset changes that need to be committed after | |
683 | * updating planes: It enables all the outputs with the new configuration which | |
684 | * had to be turned off for the update. | |
685 | */ | |
686 | void drm_atomic_helper_commit_post_planes(struct drm_device *dev, | |
687 | struct drm_atomic_state *old_state) | |
688 | { | |
689 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
690 | int nconnectors = old_state->dev->mode_config.num_connector; | |
691 | int i; | |
692 | ||
693 | for (i = 0; i < ncrtcs; i++) { | |
694 | struct drm_crtc_helper_funcs *funcs; | |
695 | struct drm_crtc *crtc; | |
696 | ||
697 | crtc = old_state->crtcs[i]; | |
698 | ||
699 | /* Need to filter out CRTCs where only planes change. */ | |
700 | if (!crtc || !crtc->state->mode_changed) | |
701 | continue; | |
702 | ||
703 | funcs = crtc->helper_private; | |
704 | ||
705 | if (crtc->state->enable) | |
706 | funcs->commit(crtc); | |
707 | } | |
708 | ||
709 | for (i = 0; i < nconnectors; i++) { | |
710 | struct drm_connector *connector; | |
711 | struct drm_encoder_helper_funcs *funcs; | |
712 | struct drm_encoder *encoder; | |
713 | ||
714 | connector = old_state->connectors[i]; | |
715 | ||
716 | if (!connector || !connector->state->best_encoder) | |
717 | continue; | |
718 | ||
719 | encoder = connector->state->best_encoder; | |
720 | funcs = encoder->helper_private; | |
721 | ||
722 | /* | |
723 | * Each encoder has at most one connector (since we always steal | |
724 | * it away), so we won't call call enable hooks twice. | |
725 | */ | |
726 | if (encoder->bridge) | |
727 | encoder->bridge->funcs->pre_enable(encoder->bridge); | |
728 | ||
729 | funcs->commit(encoder); | |
730 | ||
731 | if (encoder->bridge) | |
732 | encoder->bridge->funcs->enable(encoder->bridge); | |
733 | } | |
734 | } | |
735 | EXPORT_SYMBOL(drm_atomic_helper_commit_post_planes); | |
736 | ||
e2330f07 DV |
737 | static void wait_for_fences(struct drm_device *dev, |
738 | struct drm_atomic_state *state) | |
739 | { | |
740 | int nplanes = dev->mode_config.num_total_plane; | |
741 | int i; | |
742 | ||
743 | for (i = 0; i < nplanes; i++) { | |
744 | struct drm_plane *plane = state->planes[i]; | |
745 | ||
746 | if (!plane || !plane->state->fence) | |
747 | continue; | |
748 | ||
749 | WARN_ON(!plane->state->fb); | |
750 | ||
751 | fence_wait(plane->state->fence, false); | |
752 | fence_put(plane->state->fence); | |
753 | plane->state->fence = NULL; | |
754 | } | |
755 | } | |
756 | ||
623369e5 DV |
757 | static void |
758 | wait_for_vblanks(struct drm_device *dev, struct drm_atomic_state *old_state) | |
759 | { | |
760 | struct drm_crtc *crtc; | |
761 | struct drm_crtc_state *old_crtc_state; | |
762 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
763 | int i, ret; | |
764 | ||
765 | for (i = 0; i < ncrtcs; i++) { | |
766 | crtc = old_state->crtcs[i]; | |
767 | old_crtc_state = old_state->crtc_states[i]; | |
768 | ||
769 | if (!crtc) | |
770 | continue; | |
771 | ||
772 | /* No one cares about the old state, so abuse it for tracking | |
773 | * and store whether we hold a vblank reference (and should do a | |
774 | * vblank wait) in the ->enable boolean. */ | |
775 | old_crtc_state->enable = false; | |
776 | ||
777 | if (!crtc->state->enable) | |
778 | continue; | |
779 | ||
780 | ret = drm_crtc_vblank_get(crtc); | |
781 | if (ret != 0) | |
782 | continue; | |
783 | ||
784 | old_crtc_state->enable = true; | |
785 | old_crtc_state->last_vblank_count = drm_vblank_count(dev, i); | |
786 | } | |
787 | ||
788 | for (i = 0; i < ncrtcs; i++) { | |
789 | crtc = old_state->crtcs[i]; | |
790 | old_crtc_state = old_state->crtc_states[i]; | |
791 | ||
792 | if (!crtc || !old_crtc_state->enable) | |
793 | continue; | |
794 | ||
795 | ret = wait_event_timeout(dev->vblank[i].queue, | |
796 | old_crtc_state->last_vblank_count != | |
797 | drm_vblank_count(dev, i), | |
798 | msecs_to_jiffies(50)); | |
799 | ||
800 | drm_crtc_vblank_put(crtc); | |
801 | } | |
802 | } | |
803 | ||
804 | /** | |
805 | * drm_atomic_helper_commit - commit validated state object | |
806 | * @dev: DRM device | |
807 | * @state: the driver state object | |
808 | * @async: asynchronous commit | |
809 | * | |
810 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
811 | * object. This can still fail when e.g. the framebuffer reservation fails. For | |
812 | * now this doesn't implement asynchronous commits. | |
813 | * | |
814 | * RETURNS | |
815 | * Zero for success or -errno. | |
816 | */ | |
817 | int drm_atomic_helper_commit(struct drm_device *dev, | |
818 | struct drm_atomic_state *state, | |
819 | bool async) | |
820 | { | |
821 | int ret; | |
822 | ||
823 | if (async) | |
824 | return -EBUSY; | |
825 | ||
826 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
827 | if (ret) | |
828 | return ret; | |
829 | ||
830 | /* | |
831 | * This is the point of no return - everything below never fails except | |
832 | * when the hw goes bonghits. Which means we can commit the new state on | |
833 | * the software side now. | |
834 | */ | |
835 | ||
836 | drm_atomic_helper_swap_state(dev, state); | |
837 | ||
838 | /* | |
839 | * Everything below can be run asynchronously without the need to grab | |
840 | * any modeset locks at all under one conditions: It must be guaranteed | |
841 | * that the asynchronous work has either been cancelled (if the driver | |
842 | * supports it, which at least requires that the framebuffers get | |
843 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
844 | * before the new state gets committed on the software side with | |
845 | * drm_atomic_helper_swap_state(). | |
846 | * | |
847 | * This scheme allows new atomic state updates to be prepared and | |
848 | * checked in parallel to the asynchronous completion of the previous | |
849 | * update. Which is important since compositors need to figure out the | |
850 | * composition of the next frame right after having submitted the | |
851 | * current layout. | |
852 | */ | |
853 | ||
e2330f07 DV |
854 | wait_for_fences(dev, state); |
855 | ||
623369e5 DV |
856 | drm_atomic_helper_commit_pre_planes(dev, state); |
857 | ||
858 | drm_atomic_helper_commit_planes(dev, state); | |
859 | ||
860 | drm_atomic_helper_commit_post_planes(dev, state); | |
861 | ||
862 | wait_for_vblanks(dev, state); | |
863 | ||
864 | drm_atomic_helper_cleanup_planes(dev, state); | |
865 | ||
866 | drm_atomic_state_free(state); | |
867 | ||
868 | return 0; | |
869 | } | |
870 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
871 | ||
e8c833a7 DV |
872 | /** |
873 | * DOC: implementing async commit | |
874 | * | |
875 | * For now the atomic helpers don't support async commit directly. If there is | |
876 | * real need it could be added though, using the dma-buf fence infrastructure | |
877 | * for generic synchronization with outstanding rendering. | |
878 | * | |
879 | * For now drivers have to implement async commit themselves, with the following | |
880 | * sequence being the recommended one: | |
881 | * | |
882 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
883 | * which commit needs to call which can fail, so we want to run it first and | |
884 | * synchronously. | |
885 | * | |
886 | * 2. Synchronize with any outstanding asynchronous commit worker threads which | |
887 | * might be affected the new state update. This can be done by either cancelling | |
888 | * or flushing the work items, depending upon whether the driver can deal with | |
889 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
890 | * cleanup is still done when cancelling. | |
891 | * | |
892 | * For sufficient parallelism it is recommended to have a work item per crtc | |
893 | * (for updates which don't touch global state) and a global one. Then we only | |
894 | * need to synchronize with the crtc work items for changed crtcs and the global | |
895 | * work item, which allows nice concurrent updates on disjoint sets of crtcs. | |
896 | * | |
897 | * 3. The software state is updated synchronously with | |
898 | * drm_atomic_helper_swap_state. Doing this under the protection of all modeset | |
899 | * locks means concurrent callers never see inconsistent state. And doing this | |
900 | * while it's guaranteed that no relevant async worker runs means that async | |
901 | * workers do not need grab any locks. Actually they must not grab locks, for | |
902 | * otherwise the work flushing will deadlock. | |
903 | * | |
904 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
905 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
906 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
907 | * being displayed. | |
908 | */ | |
909 | ||
c2fcd274 DV |
910 | /** |
911 | * drm_atomic_helper_prepare_planes - prepare plane resources after commit | |
912 | * @dev: DRM device | |
913 | * @state: atomic state object with old state structures | |
914 | * | |
915 | * This function prepares plane state, specifically framebuffers, for the new | |
916 | * configuration. If any failure is encountered this function will call | |
917 | * ->cleanup_fb on any already successfully prepared framebuffer. | |
918 | * | |
919 | * Returns: | |
920 | * 0 on success, negative error code on failure. | |
921 | */ | |
922 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
923 | struct drm_atomic_state *state) | |
924 | { | |
925 | int nplanes = dev->mode_config.num_total_plane; | |
926 | int ret, i; | |
927 | ||
928 | for (i = 0; i < nplanes; i++) { | |
929 | struct drm_plane_helper_funcs *funcs; | |
930 | struct drm_plane *plane = state->planes[i]; | |
931 | struct drm_framebuffer *fb; | |
932 | ||
933 | if (!plane) | |
934 | continue; | |
935 | ||
936 | funcs = plane->helper_private; | |
937 | ||
938 | fb = state->plane_states[i]->fb; | |
939 | ||
940 | if (fb && funcs->prepare_fb) { | |
941 | ret = funcs->prepare_fb(plane, fb); | |
942 | if (ret) | |
943 | goto fail; | |
944 | } | |
945 | } | |
946 | ||
947 | return 0; | |
948 | ||
949 | fail: | |
950 | for (i--; i >= 0; i--) { | |
951 | struct drm_plane_helper_funcs *funcs; | |
952 | struct drm_plane *plane = state->planes[i]; | |
953 | struct drm_framebuffer *fb; | |
954 | ||
955 | if (!plane) | |
956 | continue; | |
957 | ||
958 | funcs = plane->helper_private; | |
959 | ||
960 | fb = state->plane_states[i]->fb; | |
961 | ||
962 | if (fb && funcs->cleanup_fb) | |
963 | funcs->cleanup_fb(plane, fb); | |
964 | ||
965 | } | |
966 | ||
967 | return ret; | |
968 | } | |
969 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
970 | ||
971 | /** | |
972 | * drm_atomic_helper_commit_planes - commit plane state | |
973 | * @dev: DRM device | |
974 | * @state: atomic state | |
975 | * | |
976 | * This function commits the new plane state using the plane and atomic helper | |
977 | * functions for planes and crtcs. It assumes that the atomic state has already | |
978 | * been pushed into the relevant object state pointers, since this step can no | |
979 | * longer fail. | |
980 | * | |
981 | * It still requires the global state object @state to know which planes and | |
982 | * crtcs need to be updated though. | |
983 | */ | |
984 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
985 | struct drm_atomic_state *state) | |
986 | { | |
987 | int nplanes = dev->mode_config.num_total_plane; | |
988 | int ncrtcs = dev->mode_config.num_crtc; | |
989 | int i; | |
990 | ||
991 | for (i = 0; i < ncrtcs; i++) { | |
992 | struct drm_crtc_helper_funcs *funcs; | |
993 | struct drm_crtc *crtc = state->crtcs[i]; | |
994 | ||
995 | if (!crtc) | |
996 | continue; | |
997 | ||
998 | funcs = crtc->helper_private; | |
999 | ||
1000 | if (!funcs || !funcs->atomic_begin) | |
1001 | continue; | |
1002 | ||
1003 | funcs->atomic_begin(crtc); | |
1004 | } | |
1005 | ||
1006 | for (i = 0; i < nplanes; i++) { | |
1007 | struct drm_plane_helper_funcs *funcs; | |
1008 | struct drm_plane *plane = state->planes[i]; | |
1009 | ||
1010 | if (!plane) | |
1011 | continue; | |
1012 | ||
1013 | funcs = plane->helper_private; | |
1014 | ||
1015 | if (!funcs || !funcs->atomic_update) | |
1016 | continue; | |
1017 | ||
1018 | funcs->atomic_update(plane); | |
1019 | } | |
1020 | ||
1021 | for (i = 0; i < ncrtcs; i++) { | |
1022 | struct drm_crtc_helper_funcs *funcs; | |
1023 | struct drm_crtc *crtc = state->crtcs[i]; | |
1024 | ||
1025 | if (!crtc) | |
1026 | continue; | |
1027 | ||
1028 | funcs = crtc->helper_private; | |
1029 | ||
1030 | if (!funcs || !funcs->atomic_flush) | |
1031 | continue; | |
1032 | ||
1033 | funcs->atomic_flush(crtc); | |
1034 | } | |
1035 | } | |
1036 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1037 | ||
1038 | /** | |
1039 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1040 | * @dev: DRM device | |
1041 | * @old_state: atomic state object with old state structures | |
1042 | * | |
1043 | * This function cleans up plane state, specifically framebuffers, from the old | |
1044 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1045 | * be able to call this function. | |
1046 | * | |
1047 | * This function must also be called on the new state when the atomic update | |
1048 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1049 | */ | |
1050 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1051 | struct drm_atomic_state *old_state) | |
1052 | { | |
1053 | int nplanes = dev->mode_config.num_total_plane; | |
1054 | int i; | |
1055 | ||
1056 | for (i = 0; i < nplanes; i++) { | |
1057 | struct drm_plane_helper_funcs *funcs; | |
1058 | struct drm_plane *plane = old_state->planes[i]; | |
1059 | struct drm_framebuffer *old_fb; | |
1060 | ||
1061 | if (!plane) | |
1062 | continue; | |
1063 | ||
1064 | funcs = plane->helper_private; | |
1065 | ||
1066 | old_fb = old_state->plane_states[i]->fb; | |
1067 | ||
1068 | if (old_fb && funcs->cleanup_fb) | |
1069 | funcs->cleanup_fb(plane, old_fb); | |
1070 | } | |
1071 | } | |
1072 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1073 | ||
1074 | /** | |
1075 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
1076 | * @dev: DRM device | |
1077 | * @state: atomic state | |
1078 | * | |
1079 | * This function stores the atomic state into the current state pointers in all | |
1080 | * driver objects. It should be called after all failing steps have been done | |
1081 | * and succeeded, but before the actual hardware state is committed. | |
1082 | * | |
1083 | * For cleanup and error recovery the current state for all changed objects will | |
1084 | * be swaped into @state. | |
1085 | * | |
1086 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1087 | * | |
1088 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1089 | * | |
1090 | * 2. Do any other steps that might fail. | |
1091 | * | |
1092 | * 3. Put the staged state into the current state pointers with this function. | |
1093 | * | |
1094 | * 4. Actually commit the hardware state. | |
1095 | * | |
1096 | * 5. Call drm_atomic_helper_cleanup_planes with @state, which since step 3 | |
1097 | * contains the old state. Also do any other cleanup required with that state. | |
1098 | */ | |
1099 | void drm_atomic_helper_swap_state(struct drm_device *dev, | |
1100 | struct drm_atomic_state *state) | |
1101 | { | |
1102 | int i; | |
1103 | ||
1104 | for (i = 0; i < dev->mode_config.num_connector; i++) { | |
1105 | struct drm_connector *connector = state->connectors[i]; | |
1106 | ||
1107 | if (!connector) | |
1108 | continue; | |
1109 | ||
1110 | connector->state->state = state; | |
1111 | swap(state->connector_states[i], connector->state); | |
1112 | connector->state->state = NULL; | |
1113 | } | |
1114 | ||
1115 | for (i = 0; i < dev->mode_config.num_crtc; i++) { | |
1116 | struct drm_crtc *crtc = state->crtcs[i]; | |
1117 | ||
1118 | if (!crtc) | |
1119 | continue; | |
1120 | ||
1121 | crtc->state->state = state; | |
1122 | swap(state->crtc_states[i], crtc->state); | |
1123 | crtc->state->state = NULL; | |
1124 | } | |
1125 | ||
1126 | for (i = 0; i < dev->mode_config.num_total_plane; i++) { | |
1127 | struct drm_plane *plane = state->planes[i]; | |
1128 | ||
1129 | if (!plane) | |
1130 | continue; | |
1131 | ||
1132 | plane->state->state = state; | |
1133 | swap(state->plane_states[i], plane->state); | |
1134 | plane->state->state = NULL; | |
1135 | } | |
1136 | } | |
1137 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
1138 | |
1139 | /** | |
1140 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
1141 | * @plane: plane object to update | |
1142 | * @crtc: owning CRTC of owning plane | |
1143 | * @fb: framebuffer to flip onto plane | |
1144 | * @crtc_x: x offset of primary plane on crtc | |
1145 | * @crtc_y: y offset of primary plane on crtc | |
1146 | * @crtc_w: width of primary plane rectangle on crtc | |
1147 | * @crtc_h: height of primary plane rectangle on crtc | |
1148 | * @src_x: x offset of @fb for panning | |
1149 | * @src_y: y offset of @fb for panning | |
1150 | * @src_w: width of source rectangle in @fb | |
1151 | * @src_h: height of source rectangle in @fb | |
1152 | * | |
1153 | * Provides a default plane update handler using the atomic driver interface. | |
1154 | * | |
1155 | * RETURNS: | |
1156 | * Zero on success, error code on failure | |
1157 | */ | |
1158 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
1159 | struct drm_crtc *crtc, | |
1160 | struct drm_framebuffer *fb, | |
1161 | int crtc_x, int crtc_y, | |
1162 | unsigned int crtc_w, unsigned int crtc_h, | |
1163 | uint32_t src_x, uint32_t src_y, | |
1164 | uint32_t src_w, uint32_t src_h) | |
1165 | { | |
1166 | struct drm_atomic_state *state; | |
1167 | struct drm_plane_state *plane_state; | |
1168 | int ret = 0; | |
1169 | ||
1170 | state = drm_atomic_state_alloc(plane->dev); | |
1171 | if (!state) | |
1172 | return -ENOMEM; | |
1173 | ||
1174 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1175 | retry: | |
1176 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1177 | if (IS_ERR(plane_state)) { | |
1178 | ret = PTR_ERR(plane_state); | |
1179 | goto fail; | |
1180 | } | |
1181 | ||
1182 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); | |
1183 | if (ret != 0) | |
1184 | goto fail; | |
1185 | plane_state->fb = fb; | |
1186 | plane_state->crtc_x = crtc_x; | |
1187 | plane_state->crtc_y = crtc_y; | |
1188 | plane_state->crtc_h = crtc_h; | |
1189 | plane_state->crtc_w = crtc_w; | |
1190 | plane_state->src_x = src_x; | |
1191 | plane_state->src_y = src_y; | |
1192 | plane_state->src_h = src_h; | |
1193 | plane_state->src_w = src_w; | |
1194 | ||
1195 | ret = drm_atomic_commit(state); | |
1196 | if (ret != 0) | |
1197 | goto fail; | |
1198 | ||
1199 | /* Driver takes ownership of state on successful commit. */ | |
1200 | return 0; | |
1201 | fail: | |
1202 | if (ret == -EDEADLK) | |
1203 | goto backoff; | |
1204 | ||
1205 | drm_atomic_state_free(state); | |
1206 | ||
1207 | return ret; | |
1208 | backoff: | |
1209 | drm_atomic_legacy_backoff(state); | |
1210 | drm_atomic_state_clear(state); | |
1211 | ||
1212 | /* | |
1213 | * Someone might have exchanged the framebuffer while we dropped locks | |
1214 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1215 | * core does for us. | |
1216 | */ | |
1217 | plane->old_fb = plane->fb; | |
1218 | ||
1219 | goto retry; | |
1220 | } | |
1221 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
1222 | ||
1223 | /** | |
1224 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
1225 | * @plane: plane to disable | |
1226 | * | |
1227 | * Provides a default plane disable handler using the atomic driver interface. | |
1228 | * | |
1229 | * RETURNS: | |
1230 | * Zero on success, error code on failure | |
1231 | */ | |
1232 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
1233 | { | |
1234 | struct drm_atomic_state *state; | |
1235 | struct drm_plane_state *plane_state; | |
1236 | int ret = 0; | |
1237 | ||
1238 | state = drm_atomic_state_alloc(plane->dev); | |
1239 | if (!state) | |
1240 | return -ENOMEM; | |
1241 | ||
1242 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
1243 | retry: | |
1244 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1245 | if (IS_ERR(plane_state)) { | |
1246 | ret = PTR_ERR(plane_state); | |
1247 | goto fail; | |
1248 | } | |
1249 | ||
1250 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
1251 | if (ret != 0) | |
1252 | goto fail; | |
1253 | plane_state->fb = NULL; | |
1254 | plane_state->crtc_x = 0; | |
1255 | plane_state->crtc_y = 0; | |
1256 | plane_state->crtc_h = 0; | |
1257 | plane_state->crtc_w = 0; | |
1258 | plane_state->src_x = 0; | |
1259 | plane_state->src_y = 0; | |
1260 | plane_state->src_h = 0; | |
1261 | plane_state->src_w = 0; | |
1262 | ||
1263 | ret = drm_atomic_commit(state); | |
1264 | if (ret != 0) | |
1265 | goto fail; | |
1266 | ||
1267 | /* Driver takes ownership of state on successful commit. */ | |
1268 | return 0; | |
1269 | fail: | |
1270 | if (ret == -EDEADLK) | |
1271 | goto backoff; | |
1272 | ||
1273 | drm_atomic_state_free(state); | |
1274 | ||
1275 | return ret; | |
1276 | backoff: | |
1277 | drm_atomic_legacy_backoff(state); | |
1278 | drm_atomic_state_clear(state); | |
1279 | ||
1280 | /* | |
1281 | * Someone might have exchanged the framebuffer while we dropped locks | |
1282 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1283 | * core does for us. | |
1284 | */ | |
1285 | plane->old_fb = plane->fb; | |
1286 | ||
1287 | goto retry; | |
1288 | } | |
1289 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
1290 | ||
1291 | static int update_output_state(struct drm_atomic_state *state, | |
1292 | struct drm_mode_set *set) | |
1293 | { | |
1294 | struct drm_device *dev = set->crtc->dev; | |
1295 | struct drm_connector_state *conn_state; | |
1296 | int nconnectors = state->dev->mode_config.num_connector; | |
1297 | int ncrtcs = state->dev->mode_config.num_crtc; | |
1298 | int ret, i, j; | |
1299 | ||
1300 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
1301 | state->acquire_ctx); | |
1302 | if (ret) | |
1303 | return ret; | |
1304 | ||
1305 | /* First grab all affected connector/crtc states. */ | |
1306 | for (i = 0; i < set->num_connectors; i++) { | |
1307 | conn_state = drm_atomic_get_connector_state(state, | |
1308 | set->connectors[i]); | |
1309 | if (IS_ERR(conn_state)) | |
1310 | return PTR_ERR(conn_state); | |
1311 | } | |
1312 | ||
1313 | for (i = 0; i < ncrtcs; i++) { | |
1314 | struct drm_crtc *crtc = state->crtcs[i]; | |
1315 | ||
1316 | if (!crtc) | |
1317 | continue; | |
1318 | ||
1319 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
1320 | if (ret) | |
1321 | return ret; | |
1322 | } | |
1323 | ||
1324 | /* Then recompute connector->crtc links and crtc enabling state. */ | |
1325 | for (i = 0; i < nconnectors; i++) { | |
1326 | struct drm_connector *connector; | |
1327 | ||
1328 | connector = state->connectors[i]; | |
1329 | conn_state = state->connector_states[i]; | |
1330 | ||
1331 | if (!connector) | |
1332 | continue; | |
1333 | ||
1334 | if (conn_state->crtc == set->crtc) { | |
1335 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1336 | NULL); | |
1337 | if (ret) | |
1338 | return ret; | |
1339 | } | |
1340 | ||
1341 | for (j = 0; j < set->num_connectors; j++) { | |
1342 | if (set->connectors[j] == connector) { | |
1343 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1344 | set->crtc); | |
1345 | if (ret) | |
1346 | return ret; | |
1347 | break; | |
1348 | } | |
1349 | } | |
1350 | } | |
1351 | ||
1352 | for (i = 0; i < ncrtcs; i++) { | |
1353 | struct drm_crtc *crtc = state->crtcs[i]; | |
1354 | struct drm_crtc_state *crtc_state = state->crtc_states[i]; | |
1355 | ||
1356 | if (!crtc) | |
1357 | continue; | |
1358 | ||
1359 | /* Don't update ->enable for the CRTC in the set_config request, | |
1360 | * since a mismatch would indicate a bug in the upper layers. | |
1361 | * The actual modeset code later on will catch any | |
1362 | * inconsistencies here. */ | |
1363 | if (crtc == set->crtc) | |
1364 | continue; | |
1365 | ||
1366 | crtc_state->enable = | |
1367 | drm_atomic_connectors_for_crtc(state, crtc); | |
1368 | } | |
1369 | ||
1370 | return 0; | |
1371 | } | |
1372 | ||
1373 | /** | |
1374 | * drm_atomic_helper_set_config - set a new config from userspace | |
1375 | * @set: mode set configuration | |
1376 | * | |
1377 | * Provides a default crtc set_config handler using the atomic driver interface. | |
1378 | * | |
1379 | * Returns: | |
1380 | * Returns 0 on success, negative errno numbers on failure. | |
1381 | */ | |
1382 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
1383 | { | |
1384 | struct drm_atomic_state *state; | |
1385 | struct drm_crtc *crtc = set->crtc; | |
1386 | struct drm_crtc_state *crtc_state; | |
1387 | struct drm_plane_state *primary_state; | |
1388 | int ret = 0; | |
1389 | ||
1390 | state = drm_atomic_state_alloc(crtc->dev); | |
1391 | if (!state) | |
1392 | return -ENOMEM; | |
1393 | ||
1394 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1395 | retry: | |
1396 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1397 | if (IS_ERR(crtc_state)) { | |
1398 | ret = PTR_ERR(crtc_state); | |
1399 | goto fail; | |
1400 | } | |
1401 | ||
1402 | if (!set->mode) { | |
1403 | WARN_ON(set->fb); | |
1404 | WARN_ON(set->num_connectors); | |
1405 | ||
1406 | crtc_state->enable = false; | |
1407 | goto commit; | |
1408 | } | |
1409 | ||
1410 | WARN_ON(!set->fb); | |
1411 | WARN_ON(!set->num_connectors); | |
1412 | ||
1413 | crtc_state->enable = true; | |
1414 | drm_mode_copy(&crtc_state->mode, set->mode); | |
1415 | ||
1416 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); | |
1417 | if (IS_ERR(primary_state)) { | |
1418 | ret = PTR_ERR(primary_state); | |
1419 | goto fail; | |
1420 | } | |
1421 | ||
1422 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); | |
1423 | if (ret != 0) | |
1424 | goto fail; | |
1425 | primary_state->fb = set->fb; | |
1426 | primary_state->crtc_x = 0; | |
1427 | primary_state->crtc_y = 0; | |
1428 | primary_state->crtc_h = set->mode->vdisplay; | |
1429 | primary_state->crtc_w = set->mode->hdisplay; | |
1430 | primary_state->src_x = set->x << 16; | |
1431 | primary_state->src_y = set->y << 16; | |
1432 | primary_state->src_h = set->mode->vdisplay << 16; | |
1433 | primary_state->src_w = set->mode->hdisplay << 16; | |
1434 | ||
1435 | commit: | |
1436 | ret = update_output_state(state, set); | |
1437 | if (ret) | |
1438 | goto fail; | |
1439 | ||
1440 | ret = drm_atomic_commit(state); | |
1441 | if (ret != 0) | |
1442 | goto fail; | |
1443 | ||
1444 | /* Driver takes ownership of state on successful commit. */ | |
1445 | return 0; | |
1446 | fail: | |
1447 | if (ret == -EDEADLK) | |
1448 | goto backoff; | |
1449 | ||
1450 | drm_atomic_state_free(state); | |
1451 | ||
1452 | return ret; | |
1453 | backoff: | |
1454 | drm_atomic_legacy_backoff(state); | |
1455 | drm_atomic_state_clear(state); | |
1456 | ||
1457 | /* | |
1458 | * Someone might have exchanged the framebuffer while we dropped locks | |
1459 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1460 | * core does for us. | |
1461 | */ | |
1462 | crtc->primary->old_fb = crtc->primary->fb; | |
1463 | ||
1464 | goto retry; | |
1465 | } | |
1466 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
1467 | ||
1468 | /** | |
1469 | * drm_atomic_helper_crtc_set_property - helper for crtc prorties | |
1470 | * @crtc: DRM crtc | |
1471 | * @property: DRM property | |
1472 | * @val: value of property | |
1473 | * | |
1474 | * Provides a default plane disablle handler using the atomic driver interface. | |
1475 | * | |
1476 | * RETURNS: | |
1477 | * Zero on success, error code on failure | |
1478 | */ | |
1479 | int | |
1480 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
1481 | struct drm_property *property, | |
1482 | uint64_t val) | |
1483 | { | |
1484 | struct drm_atomic_state *state; | |
1485 | struct drm_crtc_state *crtc_state; | |
1486 | int ret = 0; | |
1487 | ||
1488 | state = drm_atomic_state_alloc(crtc->dev); | |
1489 | if (!state) | |
1490 | return -ENOMEM; | |
1491 | ||
1492 | /* ->set_property is always called with all locks held. */ | |
1493 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
1494 | retry: | |
1495 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1496 | if (IS_ERR(crtc_state)) { | |
1497 | ret = PTR_ERR(crtc_state); | |
1498 | goto fail; | |
1499 | } | |
1500 | ||
1501 | ret = crtc->funcs->atomic_set_property(crtc, crtc_state, | |
1502 | property, val); | |
1503 | if (ret) | |
1504 | goto fail; | |
1505 | ||
1506 | ret = drm_atomic_commit(state); | |
1507 | if (ret != 0) | |
1508 | goto fail; | |
1509 | ||
1510 | /* Driver takes ownership of state on successful commit. */ | |
1511 | return 0; | |
1512 | fail: | |
1513 | if (ret == -EDEADLK) | |
1514 | goto backoff; | |
1515 | ||
1516 | drm_atomic_state_free(state); | |
1517 | ||
1518 | return ret; | |
1519 | backoff: | |
1520 | drm_atomic_legacy_backoff(state); | |
1521 | drm_atomic_state_clear(state); | |
1522 | ||
1523 | goto retry; | |
1524 | } | |
1525 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
1526 | ||
1527 | /** | |
1528 | * drm_atomic_helper_plane_set_property - helper for plane prorties | |
1529 | * @plane: DRM plane | |
1530 | * @property: DRM property | |
1531 | * @val: value of property | |
1532 | * | |
1533 | * Provides a default plane disable handler using the atomic driver interface. | |
1534 | * | |
1535 | * RETURNS: | |
1536 | * Zero on success, error code on failure | |
1537 | */ | |
1538 | int | |
1539 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
1540 | struct drm_property *property, | |
1541 | uint64_t val) | |
1542 | { | |
1543 | struct drm_atomic_state *state; | |
1544 | struct drm_plane_state *plane_state; | |
1545 | int ret = 0; | |
1546 | ||
1547 | state = drm_atomic_state_alloc(plane->dev); | |
1548 | if (!state) | |
1549 | return -ENOMEM; | |
1550 | ||
1551 | /* ->set_property is always called with all locks held. */ | |
1552 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
1553 | retry: | |
1554 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1555 | if (IS_ERR(plane_state)) { | |
1556 | ret = PTR_ERR(plane_state); | |
1557 | goto fail; | |
1558 | } | |
1559 | ||
1560 | ret = plane->funcs->atomic_set_property(plane, plane_state, | |
1561 | property, val); | |
1562 | if (ret) | |
1563 | goto fail; | |
1564 | ||
1565 | ret = drm_atomic_commit(state); | |
1566 | if (ret != 0) | |
1567 | goto fail; | |
1568 | ||
1569 | /* Driver takes ownership of state on successful commit. */ | |
1570 | return 0; | |
1571 | fail: | |
1572 | if (ret == -EDEADLK) | |
1573 | goto backoff; | |
1574 | ||
1575 | drm_atomic_state_free(state); | |
1576 | ||
1577 | return ret; | |
1578 | backoff: | |
1579 | drm_atomic_legacy_backoff(state); | |
1580 | drm_atomic_state_clear(state); | |
1581 | ||
1582 | goto retry; | |
1583 | } | |
1584 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
1585 | ||
1586 | /** | |
1587 | * drm_atomic_helper_connector_set_property - helper for connector prorties | |
1588 | * @connector: DRM connector | |
1589 | * @property: DRM property | |
1590 | * @val: value of property | |
1591 | * | |
1592 | * Provides a default plane disablle handler using the atomic driver interface. | |
1593 | * | |
1594 | * RETURNS: | |
1595 | * Zero on success, error code on failure | |
1596 | */ | |
1597 | int | |
1598 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
1599 | struct drm_property *property, | |
1600 | uint64_t val) | |
1601 | { | |
1602 | struct drm_atomic_state *state; | |
1603 | struct drm_connector_state *connector_state; | |
1604 | int ret = 0; | |
1605 | ||
1606 | state = drm_atomic_state_alloc(connector->dev); | |
1607 | if (!state) | |
1608 | return -ENOMEM; | |
1609 | ||
1610 | /* ->set_property is always called with all locks held. */ | |
1611 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
1612 | retry: | |
1613 | connector_state = drm_atomic_get_connector_state(state, connector); | |
1614 | if (IS_ERR(connector_state)) { | |
1615 | ret = PTR_ERR(connector_state); | |
1616 | goto fail; | |
1617 | } | |
1618 | ||
1619 | ret = connector->funcs->atomic_set_property(connector, connector_state, | |
1620 | property, val); | |
1621 | if (ret) | |
1622 | goto fail; | |
1623 | ||
1624 | ret = drm_atomic_commit(state); | |
1625 | if (ret != 0) | |
1626 | goto fail; | |
1627 | ||
1628 | /* Driver takes ownership of state on successful commit. */ | |
1629 | return 0; | |
1630 | fail: | |
1631 | if (ret == -EDEADLK) | |
1632 | goto backoff; | |
1633 | ||
1634 | drm_atomic_state_free(state); | |
1635 | ||
1636 | return ret; | |
1637 | backoff: | |
1638 | drm_atomic_legacy_backoff(state); | |
1639 | drm_atomic_state_clear(state); | |
1640 | ||
1641 | goto retry; | |
1642 | } | |
1643 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 DV |
1644 | |
1645 | /** | |
1646 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
1647 | * @crtc: DRM crtc | |
1648 | * @fb: DRM framebuffer | |
1649 | * @event: optional DRM event to signal upon completion | |
1650 | * @flags: flip flags for non-vblank sync'ed updates | |
1651 | * | |
1652 | * Provides a default page flip implementation using the atomic driver interface. | |
1653 | * | |
1654 | * Note that for now so called async page flips (i.e. updates which are not | |
1655 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
1656 | * no provisions for this yet. | |
1657 | * | |
1658 | * Returns: | |
1659 | * Returns 0 on success, negative errno numbers on failure. | |
1660 | */ | |
1661 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
1662 | struct drm_framebuffer *fb, | |
1663 | struct drm_pending_vblank_event *event, | |
1664 | uint32_t flags) | |
1665 | { | |
1666 | struct drm_plane *plane = crtc->primary; | |
1667 | struct drm_atomic_state *state; | |
1668 | struct drm_plane_state *plane_state; | |
1669 | struct drm_crtc_state *crtc_state; | |
1670 | int ret = 0; | |
1671 | ||
1672 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
1673 | return -EINVAL; | |
1674 | ||
1675 | state = drm_atomic_state_alloc(plane->dev); | |
1676 | if (!state) | |
1677 | return -ENOMEM; | |
1678 | ||
1679 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1680 | retry: | |
1681 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1682 | if (IS_ERR(crtc_state)) { | |
1683 | ret = PTR_ERR(crtc_state); | |
1684 | goto fail; | |
1685 | } | |
1686 | crtc_state->event = event; | |
1687 | ||
1688 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1689 | if (IS_ERR(plane_state)) { | |
1690 | ret = PTR_ERR(plane_state); | |
1691 | goto fail; | |
1692 | } | |
1693 | ||
1694 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); | |
1695 | if (ret != 0) | |
1696 | goto fail; | |
1697 | plane_state->fb = fb; | |
1698 | ||
1699 | ret = drm_atomic_async_commit(state); | |
1700 | if (ret != 0) | |
1701 | goto fail; | |
1702 | ||
1703 | /* TODO: ->page_flip is the only driver callback where the core | |
1704 | * doesn't update plane->fb. For now patch it up here. */ | |
1705 | plane->fb = plane->state->fb; | |
1706 | ||
1707 | /* Driver takes ownership of state on successful async commit. */ | |
1708 | return 0; | |
1709 | fail: | |
1710 | if (ret == -EDEADLK) | |
1711 | goto backoff; | |
1712 | ||
1713 | drm_atomic_state_free(state); | |
1714 | ||
1715 | return ret; | |
1716 | backoff: | |
1717 | drm_atomic_legacy_backoff(state); | |
1718 | drm_atomic_state_clear(state); | |
1719 | ||
1720 | /* | |
1721 | * Someone might have exchanged the framebuffer while we dropped locks | |
1722 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1723 | * core does for us. | |
1724 | */ | |
1725 | plane->old_fb = plane->fb; | |
1726 | ||
1727 | goto retry; | |
1728 | } | |
1729 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
d461701c | 1730 | |
3150c7d0 DV |
1731 | /** |
1732 | * DOC: atomic state reset and initialization | |
1733 | * | |
1734 | * Both the drm core and the atomic helpers assume that there is always the full | |
1735 | * and correct atomic software state for all connectors, CRTCs and planes | |
1736 | * available. Which is a bit a problem on driver load and also after system | |
1737 | * suspend. One way to solve this is to have a hardware state read-out | |
1738 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
1739 | * driver). | |
1740 | * | |
1741 | * The simpler solution is to just reset the software state to everything off, | |
1742 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
1743 | * the atomic helpers provide default reset implementations for all hooks. | |
1744 | */ | |
1745 | ||
d461701c DV |
1746 | /** |
1747 | * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs | |
1748 | * @crtc: drm CRTC | |
1749 | * | |
1750 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
1751 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
1752 | */ | |
1753 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
1754 | { | |
1755 | kfree(crtc->state); | |
1756 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
1757 | } | |
1758 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
1759 | ||
1760 | /** | |
1761 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
1762 | * @crtc: drm CRTC | |
1763 | * | |
1764 | * Default CRTC state duplicate hook for drivers which don't have their own | |
1765 | * subclassed CRTC state structure. | |
1766 | */ | |
1767 | struct drm_crtc_state * | |
1768 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
1769 | { | |
1770 | struct drm_crtc_state *state; | |
1771 | ||
1772 | if (WARN_ON(!crtc->state)) | |
1773 | return NULL; | |
1774 | ||
1775 | state = kmemdup(crtc->state, sizeof(*crtc->state), GFP_KERNEL); | |
1776 | ||
1777 | if (state) { | |
1778 | state->mode_changed = false; | |
1779 | state->planes_changed = false; | |
1780 | state->event = NULL; | |
1781 | } | |
1782 | ||
1783 | return state; | |
1784 | } | |
1785 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
1786 | ||
1787 | /** | |
1788 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
1789 | * @crtc: drm CRTC | |
1790 | * @state: CRTC state object to release | |
1791 | * | |
1792 | * Default CRTC state destroy hook for drivers which don't have their own | |
1793 | * subclassed CRTC state structure. | |
1794 | */ | |
1795 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
1796 | struct drm_crtc_state *state) | |
1797 | { | |
1798 | kfree(state); | |
1799 | } | |
1800 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
1801 | ||
1802 | /** | |
1803 | * drm_atomic_helper_plane_reset - default ->reset hook for planes | |
1804 | * @plane: drm plane | |
1805 | * | |
1806 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
1807 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
1808 | */ | |
1809 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
1810 | { | |
1811 | kfree(plane->state); | |
1812 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
1813 | } | |
1814 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
1815 | ||
1816 | /** | |
1817 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
1818 | * @plane: drm plane | |
1819 | * | |
1820 | * Default plane state duplicate hook for drivers which don't have their own | |
1821 | * subclassed plane state structure. | |
1822 | */ | |
1823 | struct drm_plane_state * | |
1824 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
1825 | { | |
1826 | if (WARN_ON(!plane->state)) | |
1827 | return NULL; | |
1828 | ||
1829 | return kmemdup(plane->state, sizeof(*plane->state), GFP_KERNEL); | |
1830 | } | |
1831 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
1832 | ||
1833 | /** | |
1834 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
1835 | * @plane: drm plane | |
1836 | * @state: plane state object to release | |
1837 | * | |
1838 | * Default plane state destroy hook for drivers which don't have their own | |
1839 | * subclassed plane state structure. | |
1840 | */ | |
1841 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
1842 | struct drm_plane_state *state) | |
1843 | { | |
1844 | kfree(state); | |
1845 | } | |
1846 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
1847 | ||
1848 | /** | |
1849 | * drm_atomic_helper_connector_reset - default ->reset hook for connectors | |
1850 | * @connector: drm connector | |
1851 | * | |
1852 | * Resets the atomic state for @connector by freeing the state pointer (which | |
1853 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
1854 | * object. | |
1855 | */ | |
1856 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
1857 | { | |
1858 | kfree(connector->state); | |
1859 | connector->state = kzalloc(sizeof(*connector->state), GFP_KERNEL); | |
1860 | } | |
1861 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
1862 | ||
1863 | /** | |
1864 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
1865 | * @connector: drm connector | |
1866 | * | |
1867 | * Default connector state duplicate hook for drivers which don't have their own | |
1868 | * subclassed connector state structure. | |
1869 | */ | |
1870 | struct drm_connector_state * | |
1871 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
1872 | { | |
1873 | if (WARN_ON(!connector->state)) | |
1874 | return NULL; | |
1875 | ||
1876 | return kmemdup(connector->state, sizeof(*connector->state), GFP_KERNEL); | |
1877 | } | |
1878 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
1879 | ||
1880 | /** | |
1881 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
1882 | * @connector: drm connector | |
1883 | * @state: connector state object to release | |
1884 | * | |
1885 | * Default connector state destroy hook for drivers which don't have their own | |
1886 | * subclassed connector state structure. | |
1887 | */ | |
1888 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
1889 | struct drm_connector_state *state) | |
1890 | { | |
1891 | kfree(state); | |
1892 | } | |
1893 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); |