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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> |
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; | |
623369e5 DV |
252 | struct drm_crtc_state *crtc_state; |
253 | struct drm_connector_state *conn_state; | |
254 | int i; | |
255 | bool ret; | |
256 | ||
257 | for (i = 0; i < ncrtcs; i++) { | |
258 | crtc_state = state->crtc_states[i]; | |
259 | ||
260 | if (!crtc_state || !crtc_state->mode_changed) | |
261 | continue; | |
262 | ||
263 | drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); | |
264 | } | |
265 | ||
f52b69f1 | 266 | for (i = 0; i < state->num_connector; i++) { |
623369e5 DV |
267 | struct drm_encoder_helper_funcs *funcs; |
268 | struct drm_encoder *encoder; | |
269 | ||
270 | conn_state = state->connector_states[i]; | |
271 | ||
272 | if (!conn_state) | |
273 | continue; | |
274 | ||
275 | WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); | |
276 | ||
277 | if (!conn_state->crtc || !conn_state->best_encoder) | |
278 | continue; | |
279 | ||
280 | crtc_state = | |
281 | state->crtc_states[drm_crtc_index(conn_state->crtc)]; | |
282 | ||
283 | /* | |
284 | * Each encoder has at most one connector (since we always steal | |
285 | * it away), so we won't call ->mode_fixup twice. | |
286 | */ | |
287 | encoder = conn_state->best_encoder; | |
288 | funcs = encoder->helper_private; | |
289 | ||
290 | if (encoder->bridge && encoder->bridge->funcs->mode_fixup) { | |
291 | ret = encoder->bridge->funcs->mode_fixup( | |
292 | encoder->bridge, &crtc_state->mode, | |
293 | &crtc_state->adjusted_mode); | |
294 | if (!ret) { | |
295 | DRM_DEBUG_KMS("Bridge fixup failed\n"); | |
296 | return -EINVAL; | |
297 | } | |
298 | } | |
299 | ||
300 | ||
301 | ret = funcs->mode_fixup(encoder, &crtc_state->mode, | |
302 | &crtc_state->adjusted_mode); | |
303 | if (!ret) { | |
304 | DRM_DEBUG_KMS("[ENCODER:%d:%s] fixup failed\n", | |
305 | encoder->base.id, encoder->name); | |
306 | return -EINVAL; | |
307 | } | |
308 | } | |
309 | ||
310 | for (i = 0; i < ncrtcs; i++) { | |
311 | struct drm_crtc_helper_funcs *funcs; | |
312 | struct drm_crtc *crtc; | |
313 | ||
314 | crtc_state = state->crtc_states[i]; | |
315 | crtc = state->crtcs[i]; | |
316 | ||
317 | if (!crtc_state || !crtc_state->mode_changed) | |
318 | continue; | |
319 | ||
320 | funcs = crtc->helper_private; | |
321 | ret = funcs->mode_fixup(crtc, &crtc_state->mode, | |
322 | &crtc_state->adjusted_mode); | |
323 | if (!ret) { | |
324 | DRM_DEBUG_KMS("[CRTC:%d] fixup failed\n", | |
325 | crtc->base.id); | |
326 | return -EINVAL; | |
327 | } | |
328 | } | |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
333 | static int | |
934ce1c2 | 334 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
335 | struct drm_atomic_state *state) |
336 | { | |
337 | int ncrtcs = dev->mode_config.num_crtc; | |
623369e5 DV |
338 | struct drm_crtc *crtc; |
339 | struct drm_crtc_state *crtc_state; | |
340 | int i, ret; | |
341 | ||
342 | for (i = 0; i < ncrtcs; i++) { | |
343 | crtc = state->crtcs[i]; | |
344 | crtc_state = state->crtc_states[i]; | |
345 | ||
346 | if (!crtc) | |
347 | continue; | |
348 | ||
349 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { | |
350 | DRM_DEBUG_KMS("[CRTC:%d] mode changed\n", | |
351 | crtc->base.id); | |
352 | crtc_state->mode_changed = true; | |
353 | } | |
354 | ||
355 | if (crtc->state->enable != crtc_state->enable) { | |
356 | DRM_DEBUG_KMS("[CRTC:%d] enable changed\n", | |
357 | crtc->base.id); | |
358 | crtc_state->mode_changed = true; | |
359 | } | |
360 | } | |
361 | ||
f52b69f1 | 362 | for (i = 0; i < state->num_connector; i++) { |
623369e5 DV |
363 | /* |
364 | * This only sets crtc->mode_changed for routing changes, | |
365 | * drivers must set crtc->mode_changed themselves when connector | |
366 | * properties need to be updated. | |
367 | */ | |
368 | ret = update_connector_routing(state, i); | |
369 | if (ret) | |
370 | return ret; | |
371 | } | |
372 | ||
373 | /* | |
374 | * After all the routing has been prepared we need to add in any | |
375 | * connector which is itself unchanged, but who's crtc changes it's | |
376 | * configuration. This must be done before calling mode_fixup in case a | |
377 | * crtc only changed its mode but has the same set of connectors. | |
378 | */ | |
379 | for (i = 0; i < ncrtcs; i++) { | |
380 | int num_connectors; | |
381 | ||
382 | crtc = state->crtcs[i]; | |
383 | crtc_state = state->crtc_states[i]; | |
384 | ||
385 | if (!crtc || !crtc_state->mode_changed) | |
386 | continue; | |
387 | ||
388 | DRM_DEBUG_KMS("[CRTC:%d] needs full modeset, enable: %c\n", | |
389 | crtc->base.id, | |
390 | crtc_state->enable ? 'y' : 'n'); | |
391 | ||
392 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
393 | if (ret != 0) | |
394 | return ret; | |
395 | ||
396 | num_connectors = drm_atomic_connectors_for_crtc(state, | |
397 | crtc); | |
398 | ||
399 | if (crtc_state->enable != !!num_connectors) { | |
400 | DRM_DEBUG_KMS("[CRTC:%d] enabled/connectors mismatch\n", | |
401 | crtc->base.id); | |
402 | ||
403 | return -EINVAL; | |
404 | } | |
405 | } | |
406 | ||
407 | return mode_fixup(state); | |
408 | } | |
409 | ||
c2fcd274 DV |
410 | /** |
411 | * drm_atomic_helper_check - validate state object | |
412 | * @dev: DRM device | |
413 | * @state: the driver state object | |
414 | * | |
415 | * Check the state object to see if the requested state is physically possible. | |
416 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
417 | * checking that a driver needs it can simply wrap that around this function. | |
418 | * Drivers without such needs can directly use this as their ->atomic_check() | |
419 | * callback. | |
420 | * | |
421 | * RETURNS | |
422 | * Zero for success or -errno | |
423 | */ | |
424 | int drm_atomic_helper_check(struct drm_device *dev, | |
425 | struct drm_atomic_state *state) | |
426 | { | |
427 | int nplanes = dev->mode_config.num_total_plane; | |
428 | int ncrtcs = dev->mode_config.num_crtc; | |
429 | int i, ret = 0; | |
430 | ||
431 | for (i = 0; i < nplanes; i++) { | |
432 | struct drm_plane_helper_funcs *funcs; | |
433 | struct drm_plane *plane = state->planes[i]; | |
434 | struct drm_plane_state *plane_state = state->plane_states[i]; | |
435 | ||
436 | if (!plane) | |
437 | continue; | |
438 | ||
439 | funcs = plane->helper_private; | |
440 | ||
441 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
442 | ||
443 | if (!funcs || !funcs->atomic_check) | |
444 | continue; | |
445 | ||
446 | ret = funcs->atomic_check(plane, plane_state); | |
447 | if (ret) { | |
448 | DRM_DEBUG_KMS("[PLANE:%d] atomic check failed\n", | |
449 | plane->base.id); | |
450 | return ret; | |
451 | } | |
452 | } | |
453 | ||
454 | for (i = 0; i < ncrtcs; i++) { | |
455 | struct drm_crtc_helper_funcs *funcs; | |
456 | struct drm_crtc *crtc = state->crtcs[i]; | |
457 | ||
458 | if (!crtc) | |
459 | continue; | |
460 | ||
461 | funcs = crtc->helper_private; | |
462 | ||
463 | if (!funcs || !funcs->atomic_check) | |
464 | continue; | |
465 | ||
466 | ret = funcs->atomic_check(crtc, state->crtc_states[i]); | |
467 | if (ret) { | |
468 | DRM_DEBUG_KMS("[CRTC:%d] atomic check failed\n", | |
469 | crtc->base.id); | |
470 | return ret; | |
471 | } | |
472 | } | |
473 | ||
934ce1c2 RC |
474 | ret = drm_atomic_helper_check_modeset(dev, state); |
475 | if (ret) | |
476 | return ret; | |
477 | ||
c2fcd274 DV |
478 | return ret; |
479 | } | |
480 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
481 | ||
623369e5 DV |
482 | static void |
483 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
484 | { | |
485 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
623369e5 DV |
486 | int i; |
487 | ||
f52b69f1 | 488 | for (i = 0; i < old_state->num_connector; i++) { |
623369e5 DV |
489 | struct drm_connector_state *old_conn_state; |
490 | struct drm_connector *connector; | |
491 | struct drm_encoder_helper_funcs *funcs; | |
492 | struct drm_encoder *encoder; | |
493 | ||
494 | old_conn_state = old_state->connector_states[i]; | |
495 | connector = old_state->connectors[i]; | |
496 | ||
497 | /* Shut down everything that's in the changeset and currently | |
498 | * still on. So need to check the old, saved state. */ | |
499 | if (!old_conn_state || !old_conn_state->crtc) | |
500 | continue; | |
501 | ||
46df9adb | 502 | encoder = old_conn_state->best_encoder; |
623369e5 | 503 | |
46df9adb RC |
504 | /* We shouldn't get this far if we didn't previously have |
505 | * an encoder.. but WARN_ON() rather than explode. | |
506 | */ | |
507 | if (WARN_ON(!encoder)) | |
623369e5 DV |
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 | { | |
623369e5 DV |
556 | int ncrtcs = old_state->dev->mode_config.num_crtc; |
557 | int i; | |
558 | ||
559 | /* clear out existing links */ | |
f52b69f1 | 560 | for (i = 0; i < old_state->num_connector; i++) { |
623369e5 DV |
561 | struct drm_connector *connector; |
562 | ||
563 | connector = old_state->connectors[i]; | |
564 | ||
565 | if (!connector || !connector->encoder) | |
566 | continue; | |
567 | ||
568 | WARN_ON(!connector->encoder->crtc); | |
569 | ||
570 | connector->encoder->crtc = NULL; | |
571 | connector->encoder = NULL; | |
572 | } | |
573 | ||
574 | /* set new links */ | |
f52b69f1 | 575 | for (i = 0; i < old_state->num_connector; i++) { |
623369e5 DV |
576 | struct drm_connector *connector; |
577 | ||
578 | connector = old_state->connectors[i]; | |
579 | ||
580 | if (!connector || !connector->state->crtc) | |
581 | continue; | |
582 | ||
583 | if (WARN_ON(!connector->state->best_encoder)) | |
584 | continue; | |
585 | ||
586 | connector->encoder = connector->state->best_encoder; | |
587 | connector->encoder->crtc = connector->state->crtc; | |
588 | } | |
589 | ||
590 | /* set legacy state in the crtc structure */ | |
591 | for (i = 0; i < ncrtcs; i++) { | |
592 | struct drm_crtc *crtc; | |
593 | ||
594 | crtc = old_state->crtcs[i]; | |
595 | ||
596 | if (!crtc) | |
597 | continue; | |
598 | ||
599 | crtc->mode = crtc->state->mode; | |
600 | crtc->enabled = crtc->state->enable; | |
601 | crtc->x = crtc->primary->state->src_x >> 16; | |
602 | crtc->y = crtc->primary->state->src_y >> 16; | |
603 | } | |
604 | } | |
605 | ||
606 | static void | |
607 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
608 | { | |
609 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
623369e5 DV |
610 | int i; |
611 | ||
612 | for (i = 0; i < ncrtcs; i++) { | |
613 | struct drm_crtc_helper_funcs *funcs; | |
614 | struct drm_crtc *crtc; | |
615 | ||
616 | crtc = old_state->crtcs[i]; | |
617 | ||
618 | if (!crtc || !crtc->state->mode_changed) | |
619 | continue; | |
620 | ||
621 | funcs = crtc->helper_private; | |
622 | ||
623 | if (crtc->state->enable) | |
624 | funcs->mode_set_nofb(crtc); | |
625 | } | |
626 | ||
f52b69f1 | 627 | for (i = 0; i < old_state->num_connector; i++) { |
623369e5 DV |
628 | struct drm_connector *connector; |
629 | struct drm_crtc_state *new_crtc_state; | |
630 | struct drm_encoder_helper_funcs *funcs; | |
631 | struct drm_encoder *encoder; | |
632 | struct drm_display_mode *mode, *adjusted_mode; | |
633 | ||
634 | connector = old_state->connectors[i]; | |
635 | ||
636 | if (!connector || !connector->state->best_encoder) | |
637 | continue; | |
638 | ||
639 | encoder = connector->state->best_encoder; | |
640 | funcs = encoder->helper_private; | |
641 | new_crtc_state = connector->state->crtc->state; | |
642 | mode = &new_crtc_state->mode; | |
643 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
644 | ||
645 | /* | |
646 | * Each encoder has at most one connector (since we always steal | |
647 | * it away), so we won't call call mode_set hooks twice. | |
648 | */ | |
649 | funcs->mode_set(encoder, mode, adjusted_mode); | |
650 | ||
651 | if (encoder->bridge && encoder->bridge->funcs->mode_set) | |
652 | encoder->bridge->funcs->mode_set(encoder->bridge, | |
653 | mode, adjusted_mode); | |
654 | } | |
655 | } | |
656 | ||
657 | /** | |
658 | * drm_atomic_helper_commit_pre_planes - modeset commit before plane updates | |
659 | * @dev: DRM device | |
660 | * @state: atomic state | |
661 | * | |
662 | * This function commits the modeset changes that need to be committed before | |
663 | * updating planes. It shuts down all the outputs that need to be shut down and | |
664 | * prepares them (if required) with the new mode. | |
665 | */ | |
666 | void drm_atomic_helper_commit_pre_planes(struct drm_device *dev, | |
667 | struct drm_atomic_state *state) | |
668 | { | |
669 | disable_outputs(dev, state); | |
670 | set_routing_links(dev, state); | |
671 | crtc_set_mode(dev, state); | |
672 | } | |
673 | EXPORT_SYMBOL(drm_atomic_helper_commit_pre_planes); | |
674 | ||
675 | /** | |
676 | * drm_atomic_helper_commit_post_planes - modeset commit after plane updates | |
677 | * @dev: DRM device | |
678 | * @old_state: atomic state object with old state structures | |
679 | * | |
680 | * This function commits the modeset changes that need to be committed after | |
681 | * updating planes: It enables all the outputs with the new configuration which | |
682 | * had to be turned off for the update. | |
683 | */ | |
684 | void drm_atomic_helper_commit_post_planes(struct drm_device *dev, | |
685 | struct drm_atomic_state *old_state) | |
686 | { | |
687 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
623369e5 DV |
688 | int i; |
689 | ||
690 | for (i = 0; i < ncrtcs; i++) { | |
691 | struct drm_crtc_helper_funcs *funcs; | |
692 | struct drm_crtc *crtc; | |
693 | ||
694 | crtc = old_state->crtcs[i]; | |
695 | ||
696 | /* Need to filter out CRTCs where only planes change. */ | |
697 | if (!crtc || !crtc->state->mode_changed) | |
698 | continue; | |
699 | ||
700 | funcs = crtc->helper_private; | |
701 | ||
702 | if (crtc->state->enable) | |
703 | funcs->commit(crtc); | |
704 | } | |
705 | ||
f52b69f1 | 706 | for (i = 0; i < old_state->num_connector; i++) { |
623369e5 DV |
707 | struct drm_connector *connector; |
708 | struct drm_encoder_helper_funcs *funcs; | |
709 | struct drm_encoder *encoder; | |
710 | ||
711 | connector = old_state->connectors[i]; | |
712 | ||
713 | if (!connector || !connector->state->best_encoder) | |
714 | continue; | |
715 | ||
716 | encoder = connector->state->best_encoder; | |
717 | funcs = encoder->helper_private; | |
718 | ||
719 | /* | |
720 | * Each encoder has at most one connector (since we always steal | |
721 | * it away), so we won't call call enable hooks twice. | |
722 | */ | |
723 | if (encoder->bridge) | |
724 | encoder->bridge->funcs->pre_enable(encoder->bridge); | |
725 | ||
726 | funcs->commit(encoder); | |
727 | ||
728 | if (encoder->bridge) | |
729 | encoder->bridge->funcs->enable(encoder->bridge); | |
730 | } | |
731 | } | |
732 | EXPORT_SYMBOL(drm_atomic_helper_commit_post_planes); | |
733 | ||
e2330f07 DV |
734 | static void wait_for_fences(struct drm_device *dev, |
735 | struct drm_atomic_state *state) | |
736 | { | |
737 | int nplanes = dev->mode_config.num_total_plane; | |
738 | int i; | |
739 | ||
740 | for (i = 0; i < nplanes; i++) { | |
741 | struct drm_plane *plane = state->planes[i]; | |
742 | ||
743 | if (!plane || !plane->state->fence) | |
744 | continue; | |
745 | ||
746 | WARN_ON(!plane->state->fb); | |
747 | ||
748 | fence_wait(plane->state->fence, false); | |
749 | fence_put(plane->state->fence); | |
750 | plane->state->fence = NULL; | |
751 | } | |
752 | } | |
753 | ||
ab58e338 DV |
754 | static bool framebuffer_changed(struct drm_device *dev, |
755 | struct drm_atomic_state *old_state, | |
756 | struct drm_crtc *crtc) | |
757 | { | |
758 | struct drm_plane *plane; | |
759 | struct drm_plane_state *old_plane_state; | |
760 | int nplanes = old_state->dev->mode_config.num_total_plane; | |
761 | int i; | |
762 | ||
763 | for (i = 0; i < nplanes; i++) { | |
764 | plane = old_state->planes[i]; | |
765 | old_plane_state = old_state->plane_states[i]; | |
766 | ||
767 | if (!plane) | |
768 | continue; | |
769 | ||
770 | if (plane->state->crtc != crtc && | |
771 | old_plane_state->crtc != crtc) | |
772 | continue; | |
773 | ||
774 | if (plane->state->fb != old_plane_state->fb) | |
775 | return true; | |
776 | } | |
777 | ||
778 | return false; | |
779 | } | |
780 | ||
5ee3229c RC |
781 | /** |
782 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
783 | * @dev: DRM device | |
784 | * @old_state: atomic state object with old state structures | |
785 | * | |
786 | * Helper to, after atomic commit, wait for vblanks on all effected | |
787 | * crtcs (ie. before cleaning up old framebuffers using | |
ab58e338 DV |
788 | * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
789 | * framebuffers have actually changed to optimize for the legacy cursor and | |
790 | * plane update use-case. | |
5ee3229c RC |
791 | */ |
792 | void | |
793 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
794 | struct drm_atomic_state *old_state) | |
623369e5 DV |
795 | { |
796 | struct drm_crtc *crtc; | |
797 | struct drm_crtc_state *old_crtc_state; | |
798 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
799 | int i, ret; | |
800 | ||
801 | for (i = 0; i < ncrtcs; i++) { | |
802 | crtc = old_state->crtcs[i]; | |
803 | old_crtc_state = old_state->crtc_states[i]; | |
804 | ||
805 | if (!crtc) | |
806 | continue; | |
807 | ||
808 | /* No one cares about the old state, so abuse it for tracking | |
809 | * and store whether we hold a vblank reference (and should do a | |
810 | * vblank wait) in the ->enable boolean. */ | |
811 | old_crtc_state->enable = false; | |
812 | ||
813 | if (!crtc->state->enable) | |
814 | continue; | |
815 | ||
ab58e338 DV |
816 | if (!framebuffer_changed(dev, old_state, crtc)) |
817 | continue; | |
818 | ||
623369e5 DV |
819 | ret = drm_crtc_vblank_get(crtc); |
820 | if (ret != 0) | |
821 | continue; | |
822 | ||
823 | old_crtc_state->enable = true; | |
824 | old_crtc_state->last_vblank_count = drm_vblank_count(dev, i); | |
825 | } | |
826 | ||
827 | for (i = 0; i < ncrtcs; i++) { | |
828 | crtc = old_state->crtcs[i]; | |
829 | old_crtc_state = old_state->crtc_states[i]; | |
830 | ||
831 | if (!crtc || !old_crtc_state->enable) | |
832 | continue; | |
833 | ||
834 | ret = wait_event_timeout(dev->vblank[i].queue, | |
835 | old_crtc_state->last_vblank_count != | |
836 | drm_vblank_count(dev, i), | |
837 | msecs_to_jiffies(50)); | |
838 | ||
839 | drm_crtc_vblank_put(crtc); | |
840 | } | |
841 | } | |
5ee3229c | 842 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 DV |
843 | |
844 | /** | |
845 | * drm_atomic_helper_commit - commit validated state object | |
846 | * @dev: DRM device | |
847 | * @state: the driver state object | |
848 | * @async: asynchronous commit | |
849 | * | |
850 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
851 | * object. This can still fail when e.g. the framebuffer reservation fails. For | |
852 | * now this doesn't implement asynchronous commits. | |
853 | * | |
854 | * RETURNS | |
855 | * Zero for success or -errno. | |
856 | */ | |
857 | int drm_atomic_helper_commit(struct drm_device *dev, | |
858 | struct drm_atomic_state *state, | |
859 | bool async) | |
860 | { | |
861 | int ret; | |
862 | ||
863 | if (async) | |
864 | return -EBUSY; | |
865 | ||
866 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
867 | if (ret) | |
868 | return ret; | |
869 | ||
870 | /* | |
871 | * This is the point of no return - everything below never fails except | |
872 | * when the hw goes bonghits. Which means we can commit the new state on | |
873 | * the software side now. | |
874 | */ | |
875 | ||
876 | drm_atomic_helper_swap_state(dev, state); | |
877 | ||
878 | /* | |
879 | * Everything below can be run asynchronously without the need to grab | |
880 | * any modeset locks at all under one conditions: It must be guaranteed | |
881 | * that the asynchronous work has either been cancelled (if the driver | |
882 | * supports it, which at least requires that the framebuffers get | |
883 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
884 | * before the new state gets committed on the software side with | |
885 | * drm_atomic_helper_swap_state(). | |
886 | * | |
887 | * This scheme allows new atomic state updates to be prepared and | |
888 | * checked in parallel to the asynchronous completion of the previous | |
889 | * update. Which is important since compositors need to figure out the | |
890 | * composition of the next frame right after having submitted the | |
891 | * current layout. | |
892 | */ | |
893 | ||
e2330f07 DV |
894 | wait_for_fences(dev, state); |
895 | ||
623369e5 DV |
896 | drm_atomic_helper_commit_pre_planes(dev, state); |
897 | ||
898 | drm_atomic_helper_commit_planes(dev, state); | |
899 | ||
900 | drm_atomic_helper_commit_post_planes(dev, state); | |
901 | ||
5ee3229c | 902 | drm_atomic_helper_wait_for_vblanks(dev, state); |
623369e5 DV |
903 | |
904 | drm_atomic_helper_cleanup_planes(dev, state); | |
905 | ||
906 | drm_atomic_state_free(state); | |
907 | ||
908 | return 0; | |
909 | } | |
910 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
911 | ||
e8c833a7 DV |
912 | /** |
913 | * DOC: implementing async commit | |
914 | * | |
915 | * For now the atomic helpers don't support async commit directly. If there is | |
916 | * real need it could be added though, using the dma-buf fence infrastructure | |
917 | * for generic synchronization with outstanding rendering. | |
918 | * | |
919 | * For now drivers have to implement async commit themselves, with the following | |
920 | * sequence being the recommended one: | |
921 | * | |
922 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
923 | * which commit needs to call which can fail, so we want to run it first and | |
924 | * synchronously. | |
925 | * | |
926 | * 2. Synchronize with any outstanding asynchronous commit worker threads which | |
927 | * might be affected the new state update. This can be done by either cancelling | |
928 | * or flushing the work items, depending upon whether the driver can deal with | |
929 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
930 | * cleanup is still done when cancelling. | |
931 | * | |
932 | * For sufficient parallelism it is recommended to have a work item per crtc | |
933 | * (for updates which don't touch global state) and a global one. Then we only | |
934 | * need to synchronize with the crtc work items for changed crtcs and the global | |
935 | * work item, which allows nice concurrent updates on disjoint sets of crtcs. | |
936 | * | |
937 | * 3. The software state is updated synchronously with | |
938 | * drm_atomic_helper_swap_state. Doing this under the protection of all modeset | |
939 | * locks means concurrent callers never see inconsistent state. And doing this | |
940 | * while it's guaranteed that no relevant async worker runs means that async | |
941 | * workers do not need grab any locks. Actually they must not grab locks, for | |
942 | * otherwise the work flushing will deadlock. | |
943 | * | |
944 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
945 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
946 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
947 | * being displayed. | |
948 | */ | |
949 | ||
c2fcd274 DV |
950 | /** |
951 | * drm_atomic_helper_prepare_planes - prepare plane resources after commit | |
952 | * @dev: DRM device | |
953 | * @state: atomic state object with old state structures | |
954 | * | |
955 | * This function prepares plane state, specifically framebuffers, for the new | |
956 | * configuration. If any failure is encountered this function will call | |
957 | * ->cleanup_fb on any already successfully prepared framebuffer. | |
958 | * | |
959 | * Returns: | |
960 | * 0 on success, negative error code on failure. | |
961 | */ | |
962 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
963 | struct drm_atomic_state *state) | |
964 | { | |
965 | int nplanes = dev->mode_config.num_total_plane; | |
966 | int ret, i; | |
967 | ||
968 | for (i = 0; i < nplanes; i++) { | |
969 | struct drm_plane_helper_funcs *funcs; | |
970 | struct drm_plane *plane = state->planes[i]; | |
971 | struct drm_framebuffer *fb; | |
972 | ||
973 | if (!plane) | |
974 | continue; | |
975 | ||
976 | funcs = plane->helper_private; | |
977 | ||
978 | fb = state->plane_states[i]->fb; | |
979 | ||
980 | if (fb && funcs->prepare_fb) { | |
981 | ret = funcs->prepare_fb(plane, fb); | |
982 | if (ret) | |
983 | goto fail; | |
984 | } | |
985 | } | |
986 | ||
987 | return 0; | |
988 | ||
989 | fail: | |
990 | for (i--; i >= 0; i--) { | |
991 | struct drm_plane_helper_funcs *funcs; | |
992 | struct drm_plane *plane = state->planes[i]; | |
993 | struct drm_framebuffer *fb; | |
994 | ||
995 | if (!plane) | |
996 | continue; | |
997 | ||
998 | funcs = plane->helper_private; | |
999 | ||
1000 | fb = state->plane_states[i]->fb; | |
1001 | ||
1002 | if (fb && funcs->cleanup_fb) | |
1003 | funcs->cleanup_fb(plane, fb); | |
1004 | ||
1005 | } | |
1006 | ||
1007 | return ret; | |
1008 | } | |
1009 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
1010 | ||
1011 | /** | |
1012 | * drm_atomic_helper_commit_planes - commit plane state | |
1013 | * @dev: DRM device | |
b0fcfc89 | 1014 | * @old_state: atomic state object with old state structures |
c2fcd274 DV |
1015 | * |
1016 | * This function commits the new plane state using the plane and atomic helper | |
1017 | * functions for planes and crtcs. It assumes that the atomic state has already | |
1018 | * been pushed into the relevant object state pointers, since this step can no | |
1019 | * longer fail. | |
1020 | * | |
b0fcfc89 | 1021 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 DV |
1022 | * crtcs need to be updated though. |
1023 | */ | |
1024 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
b0fcfc89 | 1025 | struct drm_atomic_state *old_state) |
c2fcd274 DV |
1026 | { |
1027 | int nplanes = dev->mode_config.num_total_plane; | |
1028 | int ncrtcs = dev->mode_config.num_crtc; | |
1029 | int i; | |
1030 | ||
1031 | for (i = 0; i < ncrtcs; i++) { | |
1032 | struct drm_crtc_helper_funcs *funcs; | |
b0fcfc89 | 1033 | struct drm_crtc *crtc = old_state->crtcs[i]; |
c2fcd274 DV |
1034 | |
1035 | if (!crtc) | |
1036 | continue; | |
1037 | ||
1038 | funcs = crtc->helper_private; | |
1039 | ||
1040 | if (!funcs || !funcs->atomic_begin) | |
1041 | continue; | |
1042 | ||
1043 | funcs->atomic_begin(crtc); | |
1044 | } | |
1045 | ||
1046 | for (i = 0; i < nplanes; i++) { | |
1047 | struct drm_plane_helper_funcs *funcs; | |
b0fcfc89 | 1048 | struct drm_plane *plane = old_state->planes[i]; |
c2fcd274 DV |
1049 | |
1050 | if (!plane) | |
1051 | continue; | |
1052 | ||
1053 | funcs = plane->helper_private; | |
1054 | ||
1055 | if (!funcs || !funcs->atomic_update) | |
1056 | continue; | |
1057 | ||
1058 | funcs->atomic_update(plane); | |
1059 | } | |
1060 | ||
1061 | for (i = 0; i < ncrtcs; i++) { | |
1062 | struct drm_crtc_helper_funcs *funcs; | |
b0fcfc89 | 1063 | struct drm_crtc *crtc = old_state->crtcs[i]; |
c2fcd274 DV |
1064 | |
1065 | if (!crtc) | |
1066 | continue; | |
1067 | ||
1068 | funcs = crtc->helper_private; | |
1069 | ||
1070 | if (!funcs || !funcs->atomic_flush) | |
1071 | continue; | |
1072 | ||
1073 | funcs->atomic_flush(crtc); | |
1074 | } | |
1075 | } | |
1076 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1077 | ||
1078 | /** | |
1079 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1080 | * @dev: DRM device | |
1081 | * @old_state: atomic state object with old state structures | |
1082 | * | |
1083 | * This function cleans up plane state, specifically framebuffers, from the old | |
1084 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1085 | * be able to call this function. | |
1086 | * | |
1087 | * This function must also be called on the new state when the atomic update | |
1088 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1089 | */ | |
1090 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1091 | struct drm_atomic_state *old_state) | |
1092 | { | |
1093 | int nplanes = dev->mode_config.num_total_plane; | |
1094 | int i; | |
1095 | ||
1096 | for (i = 0; i < nplanes; i++) { | |
1097 | struct drm_plane_helper_funcs *funcs; | |
1098 | struct drm_plane *plane = old_state->planes[i]; | |
1099 | struct drm_framebuffer *old_fb; | |
1100 | ||
1101 | if (!plane) | |
1102 | continue; | |
1103 | ||
1104 | funcs = plane->helper_private; | |
1105 | ||
1106 | old_fb = old_state->plane_states[i]->fb; | |
1107 | ||
1108 | if (old_fb && funcs->cleanup_fb) | |
1109 | funcs->cleanup_fb(plane, old_fb); | |
1110 | } | |
1111 | } | |
1112 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1113 | ||
1114 | /** | |
1115 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
1116 | * @dev: DRM device | |
1117 | * @state: atomic state | |
1118 | * | |
1119 | * This function stores the atomic state into the current state pointers in all | |
1120 | * driver objects. It should be called after all failing steps have been done | |
1121 | * and succeeded, but before the actual hardware state is committed. | |
1122 | * | |
1123 | * For cleanup and error recovery the current state for all changed objects will | |
1124 | * be swaped into @state. | |
1125 | * | |
1126 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1127 | * | |
1128 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1129 | * | |
1130 | * 2. Do any other steps that might fail. | |
1131 | * | |
1132 | * 3. Put the staged state into the current state pointers with this function. | |
1133 | * | |
1134 | * 4. Actually commit the hardware state. | |
1135 | * | |
1136 | * 5. Call drm_atomic_helper_cleanup_planes with @state, which since step 3 | |
1137 | * contains the old state. Also do any other cleanup required with that state. | |
1138 | */ | |
1139 | void drm_atomic_helper_swap_state(struct drm_device *dev, | |
1140 | struct drm_atomic_state *state) | |
1141 | { | |
1142 | int i; | |
1143 | ||
1144 | for (i = 0; i < dev->mode_config.num_connector; i++) { | |
1145 | struct drm_connector *connector = state->connectors[i]; | |
1146 | ||
1147 | if (!connector) | |
1148 | continue; | |
1149 | ||
1150 | connector->state->state = state; | |
1151 | swap(state->connector_states[i], connector->state); | |
1152 | connector->state->state = NULL; | |
1153 | } | |
1154 | ||
1155 | for (i = 0; i < dev->mode_config.num_crtc; i++) { | |
1156 | struct drm_crtc *crtc = state->crtcs[i]; | |
1157 | ||
1158 | if (!crtc) | |
1159 | continue; | |
1160 | ||
1161 | crtc->state->state = state; | |
1162 | swap(state->crtc_states[i], crtc->state); | |
1163 | crtc->state->state = NULL; | |
1164 | } | |
1165 | ||
1166 | for (i = 0; i < dev->mode_config.num_total_plane; i++) { | |
1167 | struct drm_plane *plane = state->planes[i]; | |
1168 | ||
1169 | if (!plane) | |
1170 | continue; | |
1171 | ||
1172 | plane->state->state = state; | |
1173 | swap(state->plane_states[i], plane->state); | |
1174 | plane->state->state = NULL; | |
1175 | } | |
1176 | } | |
1177 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
1178 | |
1179 | /** | |
1180 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
1181 | * @plane: plane object to update | |
1182 | * @crtc: owning CRTC of owning plane | |
1183 | * @fb: framebuffer to flip onto plane | |
1184 | * @crtc_x: x offset of primary plane on crtc | |
1185 | * @crtc_y: y offset of primary plane on crtc | |
1186 | * @crtc_w: width of primary plane rectangle on crtc | |
1187 | * @crtc_h: height of primary plane rectangle on crtc | |
1188 | * @src_x: x offset of @fb for panning | |
1189 | * @src_y: y offset of @fb for panning | |
1190 | * @src_w: width of source rectangle in @fb | |
1191 | * @src_h: height of source rectangle in @fb | |
1192 | * | |
1193 | * Provides a default plane update handler using the atomic driver interface. | |
1194 | * | |
1195 | * RETURNS: | |
1196 | * Zero on success, error code on failure | |
1197 | */ | |
1198 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
1199 | struct drm_crtc *crtc, | |
1200 | struct drm_framebuffer *fb, | |
1201 | int crtc_x, int crtc_y, | |
1202 | unsigned int crtc_w, unsigned int crtc_h, | |
1203 | uint32_t src_x, uint32_t src_y, | |
1204 | uint32_t src_w, uint32_t src_h) | |
1205 | { | |
1206 | struct drm_atomic_state *state; | |
1207 | struct drm_plane_state *plane_state; | |
1208 | int ret = 0; | |
1209 | ||
1210 | state = drm_atomic_state_alloc(plane->dev); | |
1211 | if (!state) | |
1212 | return -ENOMEM; | |
1213 | ||
1214 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1215 | retry: | |
1216 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1217 | if (IS_ERR(plane_state)) { | |
1218 | ret = PTR_ERR(plane_state); | |
1219 | goto fail; | |
1220 | } | |
1221 | ||
1222 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); | |
1223 | if (ret != 0) | |
1224 | goto fail; | |
321ebf04 | 1225 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
1226 | plane_state->crtc_x = crtc_x; |
1227 | plane_state->crtc_y = crtc_y; | |
1228 | plane_state->crtc_h = crtc_h; | |
1229 | plane_state->crtc_w = crtc_w; | |
1230 | plane_state->src_x = src_x; | |
1231 | plane_state->src_y = src_y; | |
1232 | plane_state->src_h = src_h; | |
1233 | plane_state->src_w = src_w; | |
1234 | ||
1235 | ret = drm_atomic_commit(state); | |
1236 | if (ret != 0) | |
1237 | goto fail; | |
1238 | ||
1239 | /* Driver takes ownership of state on successful commit. */ | |
1240 | return 0; | |
1241 | fail: | |
1242 | if (ret == -EDEADLK) | |
1243 | goto backoff; | |
1244 | ||
1245 | drm_atomic_state_free(state); | |
1246 | ||
1247 | return ret; | |
1248 | backoff: | |
042652ed | 1249 | drm_atomic_state_clear(state); |
6f75cea6 | 1250 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1251 | |
1252 | /* | |
1253 | * Someone might have exchanged the framebuffer while we dropped locks | |
1254 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1255 | * core does for us. | |
1256 | */ | |
1257 | plane->old_fb = plane->fb; | |
1258 | ||
1259 | goto retry; | |
1260 | } | |
1261 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
1262 | ||
1263 | /** | |
1264 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
1265 | * @plane: plane to disable | |
1266 | * | |
1267 | * Provides a default plane disable handler using the atomic driver interface. | |
1268 | * | |
1269 | * RETURNS: | |
1270 | * Zero on success, error code on failure | |
1271 | */ | |
1272 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
1273 | { | |
1274 | struct drm_atomic_state *state; | |
1275 | struct drm_plane_state *plane_state; | |
1276 | int ret = 0; | |
1277 | ||
1278 | state = drm_atomic_state_alloc(plane->dev); | |
1279 | if (!state) | |
1280 | return -ENOMEM; | |
1281 | ||
1282 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
1283 | retry: | |
1284 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1285 | if (IS_ERR(plane_state)) { | |
1286 | ret = PTR_ERR(plane_state); | |
1287 | goto fail; | |
1288 | } | |
1289 | ||
1290 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
1291 | if (ret != 0) | |
1292 | goto fail; | |
321ebf04 | 1293 | drm_atomic_set_fb_for_plane(plane_state, NULL); |
042652ed DV |
1294 | plane_state->crtc_x = 0; |
1295 | plane_state->crtc_y = 0; | |
1296 | plane_state->crtc_h = 0; | |
1297 | plane_state->crtc_w = 0; | |
1298 | plane_state->src_x = 0; | |
1299 | plane_state->src_y = 0; | |
1300 | plane_state->src_h = 0; | |
1301 | plane_state->src_w = 0; | |
1302 | ||
1303 | ret = drm_atomic_commit(state); | |
1304 | if (ret != 0) | |
1305 | goto fail; | |
1306 | ||
1307 | /* Driver takes ownership of state on successful commit. */ | |
1308 | return 0; | |
1309 | fail: | |
1310 | if (ret == -EDEADLK) | |
1311 | goto backoff; | |
1312 | ||
1313 | drm_atomic_state_free(state); | |
1314 | ||
1315 | return ret; | |
1316 | backoff: | |
042652ed | 1317 | drm_atomic_state_clear(state); |
6f75cea6 | 1318 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1319 | |
1320 | /* | |
1321 | * Someone might have exchanged the framebuffer while we dropped locks | |
1322 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1323 | * core does for us. | |
1324 | */ | |
1325 | plane->old_fb = plane->fb; | |
1326 | ||
1327 | goto retry; | |
1328 | } | |
1329 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
1330 | ||
1331 | static int update_output_state(struct drm_atomic_state *state, | |
1332 | struct drm_mode_set *set) | |
1333 | { | |
1334 | struct drm_device *dev = set->crtc->dev; | |
1335 | struct drm_connector_state *conn_state; | |
042652ed DV |
1336 | int ncrtcs = state->dev->mode_config.num_crtc; |
1337 | int ret, i, j; | |
1338 | ||
1339 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
1340 | state->acquire_ctx); | |
1341 | if (ret) | |
1342 | return ret; | |
1343 | ||
1344 | /* First grab all affected connector/crtc states. */ | |
1345 | for (i = 0; i < set->num_connectors; i++) { | |
1346 | conn_state = drm_atomic_get_connector_state(state, | |
1347 | set->connectors[i]); | |
1348 | if (IS_ERR(conn_state)) | |
1349 | return PTR_ERR(conn_state); | |
1350 | } | |
1351 | ||
1352 | for (i = 0; i < ncrtcs; i++) { | |
1353 | struct drm_crtc *crtc = state->crtcs[i]; | |
1354 | ||
1355 | if (!crtc) | |
1356 | continue; | |
1357 | ||
1358 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
1359 | if (ret) | |
1360 | return ret; | |
1361 | } | |
1362 | ||
1363 | /* Then recompute connector->crtc links and crtc enabling state. */ | |
f52b69f1 | 1364 | for (i = 0; i < state->num_connector; i++) { |
042652ed DV |
1365 | struct drm_connector *connector; |
1366 | ||
1367 | connector = state->connectors[i]; | |
1368 | conn_state = state->connector_states[i]; | |
1369 | ||
1370 | if (!connector) | |
1371 | continue; | |
1372 | ||
1373 | if (conn_state->crtc == set->crtc) { | |
1374 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1375 | NULL); | |
1376 | if (ret) | |
1377 | return ret; | |
1378 | } | |
1379 | ||
1380 | for (j = 0; j < set->num_connectors; j++) { | |
1381 | if (set->connectors[j] == connector) { | |
1382 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1383 | set->crtc); | |
1384 | if (ret) | |
1385 | return ret; | |
1386 | break; | |
1387 | } | |
1388 | } | |
1389 | } | |
1390 | ||
1391 | for (i = 0; i < ncrtcs; i++) { | |
1392 | struct drm_crtc *crtc = state->crtcs[i]; | |
1393 | struct drm_crtc_state *crtc_state = state->crtc_states[i]; | |
1394 | ||
1395 | if (!crtc) | |
1396 | continue; | |
1397 | ||
1398 | /* Don't update ->enable for the CRTC in the set_config request, | |
1399 | * since a mismatch would indicate a bug in the upper layers. | |
1400 | * The actual modeset code later on will catch any | |
1401 | * inconsistencies here. */ | |
1402 | if (crtc == set->crtc) | |
1403 | continue; | |
1404 | ||
1405 | crtc_state->enable = | |
1406 | drm_atomic_connectors_for_crtc(state, crtc); | |
1407 | } | |
1408 | ||
1409 | return 0; | |
1410 | } | |
1411 | ||
1412 | /** | |
1413 | * drm_atomic_helper_set_config - set a new config from userspace | |
1414 | * @set: mode set configuration | |
1415 | * | |
1416 | * Provides a default crtc set_config handler using the atomic driver interface. | |
1417 | * | |
1418 | * Returns: | |
1419 | * Returns 0 on success, negative errno numbers on failure. | |
1420 | */ | |
1421 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
1422 | { | |
1423 | struct drm_atomic_state *state; | |
1424 | struct drm_crtc *crtc = set->crtc; | |
1425 | struct drm_crtc_state *crtc_state; | |
1426 | struct drm_plane_state *primary_state; | |
1427 | int ret = 0; | |
1428 | ||
1429 | state = drm_atomic_state_alloc(crtc->dev); | |
1430 | if (!state) | |
1431 | return -ENOMEM; | |
1432 | ||
1433 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1434 | retry: | |
1435 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1436 | if (IS_ERR(crtc_state)) { | |
1437 | ret = PTR_ERR(crtc_state); | |
1438 | goto fail; | |
1439 | } | |
1440 | ||
1441 | if (!set->mode) { | |
1442 | WARN_ON(set->fb); | |
1443 | WARN_ON(set->num_connectors); | |
1444 | ||
1445 | crtc_state->enable = false; | |
1446 | goto commit; | |
1447 | } | |
1448 | ||
1449 | WARN_ON(!set->fb); | |
1450 | WARN_ON(!set->num_connectors); | |
1451 | ||
1452 | crtc_state->enable = true; | |
1453 | drm_mode_copy(&crtc_state->mode, set->mode); | |
1454 | ||
1455 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); | |
1456 | if (IS_ERR(primary_state)) { | |
1457 | ret = PTR_ERR(primary_state); | |
1458 | goto fail; | |
1459 | } | |
1460 | ||
1461 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); | |
1462 | if (ret != 0) | |
1463 | goto fail; | |
321ebf04 | 1464 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
042652ed DV |
1465 | primary_state->crtc_x = 0; |
1466 | primary_state->crtc_y = 0; | |
1467 | primary_state->crtc_h = set->mode->vdisplay; | |
1468 | primary_state->crtc_w = set->mode->hdisplay; | |
1469 | primary_state->src_x = set->x << 16; | |
1470 | primary_state->src_y = set->y << 16; | |
1471 | primary_state->src_h = set->mode->vdisplay << 16; | |
1472 | primary_state->src_w = set->mode->hdisplay << 16; | |
1473 | ||
1474 | commit: | |
1475 | ret = update_output_state(state, set); | |
1476 | if (ret) | |
1477 | goto fail; | |
1478 | ||
1479 | ret = drm_atomic_commit(state); | |
1480 | if (ret != 0) | |
1481 | goto fail; | |
1482 | ||
1483 | /* Driver takes ownership of state on successful commit. */ | |
1484 | return 0; | |
1485 | fail: | |
1486 | if (ret == -EDEADLK) | |
1487 | goto backoff; | |
1488 | ||
1489 | drm_atomic_state_free(state); | |
1490 | ||
1491 | return ret; | |
1492 | backoff: | |
042652ed | 1493 | drm_atomic_state_clear(state); |
6f75cea6 | 1494 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1495 | |
1496 | /* | |
1497 | * Someone might have exchanged the framebuffer while we dropped locks | |
1498 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1499 | * core does for us. | |
1500 | */ | |
1501 | crtc->primary->old_fb = crtc->primary->fb; | |
1502 | ||
1503 | goto retry; | |
1504 | } | |
1505 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
1506 | ||
1507 | /** | |
1508 | * drm_atomic_helper_crtc_set_property - helper for crtc prorties | |
1509 | * @crtc: DRM crtc | |
1510 | * @property: DRM property | |
1511 | * @val: value of property | |
1512 | * | |
1513 | * Provides a default plane disablle handler using the atomic driver interface. | |
1514 | * | |
1515 | * RETURNS: | |
1516 | * Zero on success, error code on failure | |
1517 | */ | |
1518 | int | |
1519 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
1520 | struct drm_property *property, | |
1521 | uint64_t val) | |
1522 | { | |
1523 | struct drm_atomic_state *state; | |
1524 | struct drm_crtc_state *crtc_state; | |
1525 | int ret = 0; | |
1526 | ||
1527 | state = drm_atomic_state_alloc(crtc->dev); | |
1528 | if (!state) | |
1529 | return -ENOMEM; | |
1530 | ||
1531 | /* ->set_property is always called with all locks held. */ | |
1532 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
1533 | retry: | |
1534 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1535 | if (IS_ERR(crtc_state)) { | |
1536 | ret = PTR_ERR(crtc_state); | |
1537 | goto fail; | |
1538 | } | |
1539 | ||
1540 | ret = crtc->funcs->atomic_set_property(crtc, crtc_state, | |
1541 | property, val); | |
1542 | if (ret) | |
1543 | goto fail; | |
1544 | ||
1545 | ret = drm_atomic_commit(state); | |
1546 | if (ret != 0) | |
1547 | goto fail; | |
1548 | ||
1549 | /* Driver takes ownership of state on successful commit. */ | |
1550 | return 0; | |
1551 | fail: | |
1552 | if (ret == -EDEADLK) | |
1553 | goto backoff; | |
1554 | ||
1555 | drm_atomic_state_free(state); | |
1556 | ||
1557 | return ret; | |
1558 | backoff: | |
042652ed | 1559 | drm_atomic_state_clear(state); |
6f75cea6 | 1560 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1561 | |
1562 | goto retry; | |
1563 | } | |
1564 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
1565 | ||
1566 | /** | |
1567 | * drm_atomic_helper_plane_set_property - helper for plane prorties | |
1568 | * @plane: DRM plane | |
1569 | * @property: DRM property | |
1570 | * @val: value of property | |
1571 | * | |
1572 | * Provides a default plane disable handler using the atomic driver interface. | |
1573 | * | |
1574 | * RETURNS: | |
1575 | * Zero on success, error code on failure | |
1576 | */ | |
1577 | int | |
1578 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
1579 | struct drm_property *property, | |
1580 | uint64_t val) | |
1581 | { | |
1582 | struct drm_atomic_state *state; | |
1583 | struct drm_plane_state *plane_state; | |
1584 | int ret = 0; | |
1585 | ||
1586 | state = drm_atomic_state_alloc(plane->dev); | |
1587 | if (!state) | |
1588 | return -ENOMEM; | |
1589 | ||
1590 | /* ->set_property is always called with all locks held. */ | |
1591 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
1592 | retry: | |
1593 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1594 | if (IS_ERR(plane_state)) { | |
1595 | ret = PTR_ERR(plane_state); | |
1596 | goto fail; | |
1597 | } | |
1598 | ||
1599 | ret = plane->funcs->atomic_set_property(plane, plane_state, | |
1600 | property, val); | |
1601 | if (ret) | |
1602 | goto fail; | |
1603 | ||
1604 | ret = drm_atomic_commit(state); | |
1605 | if (ret != 0) | |
1606 | goto fail; | |
1607 | ||
1608 | /* Driver takes ownership of state on successful commit. */ | |
1609 | return 0; | |
1610 | fail: | |
1611 | if (ret == -EDEADLK) | |
1612 | goto backoff; | |
1613 | ||
1614 | drm_atomic_state_free(state); | |
1615 | ||
1616 | return ret; | |
1617 | backoff: | |
042652ed | 1618 | drm_atomic_state_clear(state); |
6f75cea6 | 1619 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1620 | |
1621 | goto retry; | |
1622 | } | |
1623 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
1624 | ||
1625 | /** | |
1626 | * drm_atomic_helper_connector_set_property - helper for connector prorties | |
1627 | * @connector: DRM connector | |
1628 | * @property: DRM property | |
1629 | * @val: value of property | |
1630 | * | |
1631 | * Provides a default plane disablle handler using the atomic driver interface. | |
1632 | * | |
1633 | * RETURNS: | |
1634 | * Zero on success, error code on failure | |
1635 | */ | |
1636 | int | |
1637 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
1638 | struct drm_property *property, | |
1639 | uint64_t val) | |
1640 | { | |
1641 | struct drm_atomic_state *state; | |
1642 | struct drm_connector_state *connector_state; | |
1643 | int ret = 0; | |
1644 | ||
1645 | state = drm_atomic_state_alloc(connector->dev); | |
1646 | if (!state) | |
1647 | return -ENOMEM; | |
1648 | ||
1649 | /* ->set_property is always called with all locks held. */ | |
1650 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
1651 | retry: | |
1652 | connector_state = drm_atomic_get_connector_state(state, connector); | |
1653 | if (IS_ERR(connector_state)) { | |
1654 | ret = PTR_ERR(connector_state); | |
1655 | goto fail; | |
1656 | } | |
1657 | ||
1658 | ret = connector->funcs->atomic_set_property(connector, connector_state, | |
1659 | property, val); | |
1660 | if (ret) | |
1661 | goto fail; | |
1662 | ||
1663 | ret = drm_atomic_commit(state); | |
1664 | if (ret != 0) | |
1665 | goto fail; | |
1666 | ||
1667 | /* Driver takes ownership of state on successful commit. */ | |
1668 | return 0; | |
1669 | fail: | |
1670 | if (ret == -EDEADLK) | |
1671 | goto backoff; | |
1672 | ||
1673 | drm_atomic_state_free(state); | |
1674 | ||
1675 | return ret; | |
1676 | backoff: | |
042652ed | 1677 | drm_atomic_state_clear(state); |
6f75cea6 | 1678 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1679 | |
1680 | goto retry; | |
1681 | } | |
1682 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 DV |
1683 | |
1684 | /** | |
1685 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
1686 | * @crtc: DRM crtc | |
1687 | * @fb: DRM framebuffer | |
1688 | * @event: optional DRM event to signal upon completion | |
1689 | * @flags: flip flags for non-vblank sync'ed updates | |
1690 | * | |
1691 | * Provides a default page flip implementation using the atomic driver interface. | |
1692 | * | |
1693 | * Note that for now so called async page flips (i.e. updates which are not | |
1694 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
1695 | * no provisions for this yet. | |
1696 | * | |
1697 | * Returns: | |
1698 | * Returns 0 on success, negative errno numbers on failure. | |
1699 | */ | |
1700 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
1701 | struct drm_framebuffer *fb, | |
1702 | struct drm_pending_vblank_event *event, | |
1703 | uint32_t flags) | |
1704 | { | |
1705 | struct drm_plane *plane = crtc->primary; | |
1706 | struct drm_atomic_state *state; | |
1707 | struct drm_plane_state *plane_state; | |
1708 | struct drm_crtc_state *crtc_state; | |
1709 | int ret = 0; | |
1710 | ||
1711 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
1712 | return -EINVAL; | |
1713 | ||
1714 | state = drm_atomic_state_alloc(plane->dev); | |
1715 | if (!state) | |
1716 | return -ENOMEM; | |
1717 | ||
1718 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1719 | retry: | |
1720 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1721 | if (IS_ERR(crtc_state)) { | |
1722 | ret = PTR_ERR(crtc_state); | |
1723 | goto fail; | |
1724 | } | |
1725 | crtc_state->event = event; | |
1726 | ||
1727 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1728 | if (IS_ERR(plane_state)) { | |
1729 | ret = PTR_ERR(plane_state); | |
1730 | goto fail; | |
1731 | } | |
1732 | ||
1733 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); | |
1734 | if (ret != 0) | |
1735 | goto fail; | |
321ebf04 | 1736 | drm_atomic_set_fb_for_plane(plane_state, fb); |
8bc0f312 DV |
1737 | |
1738 | ret = drm_atomic_async_commit(state); | |
1739 | if (ret != 0) | |
1740 | goto fail; | |
1741 | ||
1742 | /* TODO: ->page_flip is the only driver callback where the core | |
1743 | * doesn't update plane->fb. For now patch it up here. */ | |
1744 | plane->fb = plane->state->fb; | |
1745 | ||
1746 | /* Driver takes ownership of state on successful async commit. */ | |
1747 | return 0; | |
1748 | fail: | |
1749 | if (ret == -EDEADLK) | |
1750 | goto backoff; | |
1751 | ||
1752 | drm_atomic_state_free(state); | |
1753 | ||
1754 | return ret; | |
1755 | backoff: | |
8bc0f312 | 1756 | drm_atomic_state_clear(state); |
6f75cea6 | 1757 | drm_atomic_legacy_backoff(state); |
8bc0f312 DV |
1758 | |
1759 | /* | |
1760 | * Someone might have exchanged the framebuffer while we dropped locks | |
1761 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1762 | * core does for us. | |
1763 | */ | |
1764 | plane->old_fb = plane->fb; | |
1765 | ||
1766 | goto retry; | |
1767 | } | |
1768 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
d461701c | 1769 | |
3150c7d0 DV |
1770 | /** |
1771 | * DOC: atomic state reset and initialization | |
1772 | * | |
1773 | * Both the drm core and the atomic helpers assume that there is always the full | |
1774 | * and correct atomic software state for all connectors, CRTCs and planes | |
1775 | * available. Which is a bit a problem on driver load and also after system | |
1776 | * suspend. One way to solve this is to have a hardware state read-out | |
1777 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
1778 | * driver). | |
1779 | * | |
1780 | * The simpler solution is to just reset the software state to everything off, | |
1781 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
1782 | * the atomic helpers provide default reset implementations for all hooks. | |
1783 | */ | |
1784 | ||
d461701c DV |
1785 | /** |
1786 | * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs | |
1787 | * @crtc: drm CRTC | |
1788 | * | |
1789 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
1790 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
1791 | */ | |
1792 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
1793 | { | |
1794 | kfree(crtc->state); | |
1795 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
1796 | } | |
1797 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
1798 | ||
1799 | /** | |
1800 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
1801 | * @crtc: drm CRTC | |
1802 | * | |
1803 | * Default CRTC state duplicate hook for drivers which don't have their own | |
1804 | * subclassed CRTC state structure. | |
1805 | */ | |
1806 | struct drm_crtc_state * | |
1807 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
1808 | { | |
1809 | struct drm_crtc_state *state; | |
1810 | ||
1811 | if (WARN_ON(!crtc->state)) | |
1812 | return NULL; | |
1813 | ||
1814 | state = kmemdup(crtc->state, sizeof(*crtc->state), GFP_KERNEL); | |
1815 | ||
1816 | if (state) { | |
1817 | state->mode_changed = false; | |
1818 | state->planes_changed = false; | |
1819 | state->event = NULL; | |
1820 | } | |
1821 | ||
1822 | return state; | |
1823 | } | |
1824 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
1825 | ||
1826 | /** | |
1827 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
1828 | * @crtc: drm CRTC | |
1829 | * @state: CRTC state object to release | |
1830 | * | |
1831 | * Default CRTC state destroy hook for drivers which don't have their own | |
1832 | * subclassed CRTC state structure. | |
1833 | */ | |
1834 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
1835 | struct drm_crtc_state *state) | |
1836 | { | |
1837 | kfree(state); | |
1838 | } | |
1839 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
1840 | ||
1841 | /** | |
1842 | * drm_atomic_helper_plane_reset - default ->reset hook for planes | |
1843 | * @plane: drm plane | |
1844 | * | |
1845 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
1846 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
1847 | */ | |
1848 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
1849 | { | |
321ebf04 DV |
1850 | if (plane->state && plane->state->fb) |
1851 | drm_framebuffer_unreference(plane->state->fb); | |
1852 | ||
d461701c DV |
1853 | kfree(plane->state); |
1854 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
1855 | } | |
1856 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
1857 | ||
1858 | /** | |
1859 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
1860 | * @plane: drm plane | |
1861 | * | |
1862 | * Default plane state duplicate hook for drivers which don't have their own | |
1863 | * subclassed plane state structure. | |
1864 | */ | |
1865 | struct drm_plane_state * | |
1866 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
1867 | { | |
321ebf04 DV |
1868 | struct drm_plane_state *state; |
1869 | ||
d461701c DV |
1870 | if (WARN_ON(!plane->state)) |
1871 | return NULL; | |
1872 | ||
321ebf04 DV |
1873 | state = kmemdup(plane->state, sizeof(*plane->state), GFP_KERNEL); |
1874 | ||
1875 | if (state && state->fb) | |
1876 | drm_framebuffer_reference(state->fb); | |
1877 | ||
1878 | return state; | |
d461701c DV |
1879 | } |
1880 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
1881 | ||
1882 | /** | |
1883 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
1884 | * @plane: drm plane | |
1885 | * @state: plane state object to release | |
1886 | * | |
1887 | * Default plane state destroy hook for drivers which don't have their own | |
1888 | * subclassed plane state structure. | |
1889 | */ | |
1890 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
321ebf04 | 1891 | struct drm_plane_state *state) |
d461701c | 1892 | { |
321ebf04 DV |
1893 | if (state->fb) |
1894 | drm_framebuffer_unreference(state->fb); | |
1895 | ||
d461701c DV |
1896 | kfree(state); |
1897 | } | |
1898 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
1899 | ||
1900 | /** | |
1901 | * drm_atomic_helper_connector_reset - default ->reset hook for connectors | |
1902 | * @connector: drm connector | |
1903 | * | |
1904 | * Resets the atomic state for @connector by freeing the state pointer (which | |
1905 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
1906 | * object. | |
1907 | */ | |
1908 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
1909 | { | |
1910 | kfree(connector->state); | |
1911 | connector->state = kzalloc(sizeof(*connector->state), GFP_KERNEL); | |
1912 | } | |
1913 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
1914 | ||
1915 | /** | |
1916 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
1917 | * @connector: drm connector | |
1918 | * | |
1919 | * Default connector state duplicate hook for drivers which don't have their own | |
1920 | * subclassed connector state structure. | |
1921 | */ | |
1922 | struct drm_connector_state * | |
1923 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
1924 | { | |
1925 | if (WARN_ON(!connector->state)) | |
1926 | return NULL; | |
1927 | ||
1928 | return kmemdup(connector->state, sizeof(*connector->state), GFP_KERNEL); | |
1929 | } | |
1930 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
1931 | ||
1932 | /** | |
1933 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
1934 | * @connector: drm connector | |
1935 | * @state: connector state object to release | |
1936 | * | |
1937 | * Default connector state destroy hook for drivers which don't have their own | |
1938 | * subclassed connector state structure. | |
1939 | */ | |
1940 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
1941 | struct drm_connector_state *state) | |
1942 | { | |
1943 | kfree(state); | |
1944 | } | |
1945 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); |