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) { | |
4b08eae5 | 64 | crtc_state = state->crtc_states[drm_crtc_index(plane->state->crtc)]; |
c2fcd274 DV |
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 | ||
4cd4df80 TR |
300 | if (funcs->atomic_check) { |
301 | ret = funcs->atomic_check(encoder, crtc_state, | |
302 | conn_state); | |
303 | if (ret) { | |
304 | DRM_DEBUG_KMS("[ENCODER:%d:%s] check failed\n", | |
305 | encoder->base.id, encoder->name); | |
306 | return ret; | |
307 | } | |
308 | } else { | |
309 | ret = funcs->mode_fixup(encoder, &crtc_state->mode, | |
310 | &crtc_state->adjusted_mode); | |
311 | if (!ret) { | |
312 | DRM_DEBUG_KMS("[ENCODER:%d:%s] fixup failed\n", | |
313 | encoder->base.id, encoder->name); | |
314 | return -EINVAL; | |
315 | } | |
623369e5 DV |
316 | } |
317 | } | |
318 | ||
319 | for (i = 0; i < ncrtcs; i++) { | |
320 | struct drm_crtc_helper_funcs *funcs; | |
321 | struct drm_crtc *crtc; | |
322 | ||
323 | crtc_state = state->crtc_states[i]; | |
324 | crtc = state->crtcs[i]; | |
325 | ||
326 | if (!crtc_state || !crtc_state->mode_changed) | |
327 | continue; | |
328 | ||
329 | funcs = crtc->helper_private; | |
330 | ret = funcs->mode_fixup(crtc, &crtc_state->mode, | |
331 | &crtc_state->adjusted_mode); | |
332 | if (!ret) { | |
333 | DRM_DEBUG_KMS("[CRTC:%d] fixup failed\n", | |
334 | crtc->base.id); | |
335 | return -EINVAL; | |
336 | } | |
337 | } | |
338 | ||
339 | return 0; | |
340 | } | |
341 | ||
eab3bbef DV |
342 | static bool |
343 | needs_modeset(struct drm_crtc_state *state) | |
344 | { | |
345 | return state->mode_changed || state->active_changed; | |
346 | } | |
347 | ||
d9b13620 DV |
348 | /** |
349 | * drm_atomic_helper_check - validate state object for modeset changes | |
350 | * @dev: DRM device | |
351 | * @state: the driver state object | |
352 | * | |
353 | * Check the state object to see if the requested state is physically possible. | |
354 | * This does all the crtc and connector related computations for an atomic | |
355 | * update. It computes and updates crtc_state->mode_changed, adds any additional | |
356 | * connectors needed for full modesets and calls down into ->mode_fixup | |
357 | * functions of the driver backend. | |
358 | * | |
359 | * IMPORTANT: | |
360 | * | |
361 | * Drivers which update ->mode_changed (e.g. in their ->atomic_check hooks if a | |
362 | * plane update can't be done without a full modeset) _must_ call this function | |
363 | * afterwards after that change. It is permitted to call this function multiple | |
364 | * times for the same update, e.g. when the ->atomic_check functions depend upon | |
365 | * the adjusted dotclock for fifo space allocation and watermark computation. | |
366 | * | |
367 | * RETURNS | |
368 | * Zero for success or -errno | |
369 | */ | |
370 | int | |
934ce1c2 | 371 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
372 | struct drm_atomic_state *state) |
373 | { | |
374 | int ncrtcs = dev->mode_config.num_crtc; | |
623369e5 DV |
375 | struct drm_crtc *crtc; |
376 | struct drm_crtc_state *crtc_state; | |
377 | int i, ret; | |
378 | ||
379 | for (i = 0; i < ncrtcs; i++) { | |
380 | crtc = state->crtcs[i]; | |
381 | crtc_state = state->crtc_states[i]; | |
382 | ||
383 | if (!crtc) | |
384 | continue; | |
385 | ||
386 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { | |
387 | DRM_DEBUG_KMS("[CRTC:%d] mode changed\n", | |
388 | crtc->base.id); | |
389 | crtc_state->mode_changed = true; | |
390 | } | |
391 | ||
392 | if (crtc->state->enable != crtc_state->enable) { | |
393 | DRM_DEBUG_KMS("[CRTC:%d] enable changed\n", | |
394 | crtc->base.id); | |
395 | crtc_state->mode_changed = true; | |
396 | } | |
397 | } | |
398 | ||
f52b69f1 | 399 | for (i = 0; i < state->num_connector; i++) { |
623369e5 DV |
400 | /* |
401 | * This only sets crtc->mode_changed for routing changes, | |
402 | * drivers must set crtc->mode_changed themselves when connector | |
403 | * properties need to be updated. | |
404 | */ | |
405 | ret = update_connector_routing(state, i); | |
406 | if (ret) | |
407 | return ret; | |
408 | } | |
409 | ||
410 | /* | |
411 | * After all the routing has been prepared we need to add in any | |
412 | * connector which is itself unchanged, but who's crtc changes it's | |
413 | * configuration. This must be done before calling mode_fixup in case a | |
414 | * crtc only changed its mode but has the same set of connectors. | |
415 | */ | |
416 | for (i = 0; i < ncrtcs; i++) { | |
417 | int num_connectors; | |
418 | ||
419 | crtc = state->crtcs[i]; | |
420 | crtc_state = state->crtc_states[i]; | |
421 | ||
eab3bbef | 422 | if (!crtc) |
623369e5 DV |
423 | continue; |
424 | ||
eab3bbef DV |
425 | /* |
426 | * We must set ->active_changed after walking connectors for | |
427 | * otherwise an update that only changes active would result in | |
428 | * a full modeset because update_connector_routing force that. | |
429 | */ | |
430 | if (crtc->state->active != crtc_state->active) { | |
431 | DRM_DEBUG_KMS("[CRTC:%d] active changed\n", | |
432 | crtc->base.id); | |
433 | crtc_state->active_changed = true; | |
434 | } | |
435 | ||
436 | if (!needs_modeset(crtc_state)) | |
623369e5 DV |
437 | continue; |
438 | ||
eab3bbef | 439 | DRM_DEBUG_KMS("[CRTC:%d] needs all connectors, enable: %c, active: %c\n", |
623369e5 | 440 | crtc->base.id, |
eab3bbef DV |
441 | crtc_state->enable ? 'y' : 'n', |
442 | crtc_state->active ? 'y' : 'n'); | |
623369e5 DV |
443 | |
444 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
445 | if (ret != 0) | |
446 | return ret; | |
447 | ||
448 | num_connectors = drm_atomic_connectors_for_crtc(state, | |
449 | crtc); | |
450 | ||
451 | if (crtc_state->enable != !!num_connectors) { | |
452 | DRM_DEBUG_KMS("[CRTC:%d] enabled/connectors mismatch\n", | |
453 | crtc->base.id); | |
454 | ||
455 | return -EINVAL; | |
456 | } | |
457 | } | |
458 | ||
459 | return mode_fixup(state); | |
460 | } | |
d9b13620 | 461 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 462 | |
c2fcd274 | 463 | /** |
d9b13620 | 464 | * drm_atomic_helper_check - validate state object for modeset changes |
c2fcd274 DV |
465 | * @dev: DRM device |
466 | * @state: the driver state object | |
467 | * | |
468 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 DV |
469 | * This does all the plane update related checks using by calling into the |
470 | * ->atomic_check hooks provided by the driver. | |
c2fcd274 DV |
471 | * |
472 | * RETURNS | |
473 | * Zero for success or -errno | |
474 | */ | |
d9b13620 DV |
475 | int |
476 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
477 | struct drm_atomic_state *state) | |
c2fcd274 DV |
478 | { |
479 | int nplanes = dev->mode_config.num_total_plane; | |
480 | int ncrtcs = dev->mode_config.num_crtc; | |
481 | int i, ret = 0; | |
482 | ||
483 | for (i = 0; i < nplanes; i++) { | |
484 | struct drm_plane_helper_funcs *funcs; | |
485 | struct drm_plane *plane = state->planes[i]; | |
486 | struct drm_plane_state *plane_state = state->plane_states[i]; | |
487 | ||
488 | if (!plane) | |
489 | continue; | |
490 | ||
491 | funcs = plane->helper_private; | |
492 | ||
493 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
494 | ||
495 | if (!funcs || !funcs->atomic_check) | |
496 | continue; | |
497 | ||
498 | ret = funcs->atomic_check(plane, plane_state); | |
499 | if (ret) { | |
5e743737 | 500 | DRM_DEBUG_KMS("[PLANE:%d] atomic driver check failed\n", |
c2fcd274 DV |
501 | plane->base.id); |
502 | return ret; | |
503 | } | |
504 | } | |
505 | ||
506 | for (i = 0; i < ncrtcs; i++) { | |
507 | struct drm_crtc_helper_funcs *funcs; | |
508 | struct drm_crtc *crtc = state->crtcs[i]; | |
509 | ||
510 | if (!crtc) | |
511 | continue; | |
512 | ||
513 | funcs = crtc->helper_private; | |
514 | ||
515 | if (!funcs || !funcs->atomic_check) | |
516 | continue; | |
517 | ||
518 | ret = funcs->atomic_check(crtc, state->crtc_states[i]); | |
519 | if (ret) { | |
5e743737 | 520 | DRM_DEBUG_KMS("[CRTC:%d] atomic driver check failed\n", |
c2fcd274 DV |
521 | crtc->base.id); |
522 | return ret; | |
523 | } | |
524 | } | |
525 | ||
d9b13620 DV |
526 | return ret; |
527 | } | |
528 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
529 | ||
530 | /** | |
531 | * drm_atomic_helper_check - validate state object | |
532 | * @dev: DRM device | |
533 | * @state: the driver state object | |
534 | * | |
535 | * Check the state object to see if the requested state is physically possible. | |
536 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
537 | * checking that a driver needs it can simply wrap that around this function. | |
538 | * Drivers without such needs can directly use this as their ->atomic_check() | |
539 | * callback. | |
540 | * | |
b4274fbe DV |
541 | * This just wraps the two parts of the state checking for planes and modeset |
542 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
543 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
544 | * ->atomic_check functions depend upon an updated adjusted_mode.clock to | |
545 | * e.g. properly compute watermarks. | |
546 | * | |
d9b13620 DV |
547 | * RETURNS |
548 | * Zero for success or -errno | |
549 | */ | |
550 | int drm_atomic_helper_check(struct drm_device *dev, | |
551 | struct drm_atomic_state *state) | |
552 | { | |
553 | int ret; | |
554 | ||
b4274fbe | 555 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
556 | if (ret) |
557 | return ret; | |
558 | ||
b4274fbe | 559 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
560 | if (ret) |
561 | return ret; | |
562 | ||
c2fcd274 DV |
563 | return ret; |
564 | } | |
565 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
566 | ||
623369e5 DV |
567 | static void |
568 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
569 | { | |
570 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
623369e5 DV |
571 | int i; |
572 | ||
f52b69f1 | 573 | for (i = 0; i < old_state->num_connector; i++) { |
623369e5 DV |
574 | struct drm_connector_state *old_conn_state; |
575 | struct drm_connector *connector; | |
576 | struct drm_encoder_helper_funcs *funcs; | |
577 | struct drm_encoder *encoder; | |
eab3bbef | 578 | struct drm_crtc_state *old_crtc_state; |
623369e5 DV |
579 | |
580 | old_conn_state = old_state->connector_states[i]; | |
581 | connector = old_state->connectors[i]; | |
582 | ||
583 | /* Shut down everything that's in the changeset and currently | |
584 | * still on. So need to check the old, saved state. */ | |
585 | if (!old_conn_state || !old_conn_state->crtc) | |
586 | continue; | |
587 | ||
eab3bbef DV |
588 | old_crtc_state = old_state->crtc_states[drm_crtc_index(old_conn_state->crtc)]; |
589 | ||
590 | if (!old_crtc_state->active) | |
591 | continue; | |
592 | ||
46df9adb | 593 | encoder = old_conn_state->best_encoder; |
623369e5 | 594 | |
46df9adb RC |
595 | /* We shouldn't get this far if we didn't previously have |
596 | * an encoder.. but WARN_ON() rather than explode. | |
597 | */ | |
598 | if (WARN_ON(!encoder)) | |
623369e5 DV |
599 | continue; |
600 | ||
601 | funcs = encoder->helper_private; | |
602 | ||
95d6eb3b DV |
603 | DRM_DEBUG_KMS("disabling [ENCODER:%d:%s]\n", |
604 | encoder->base.id, encoder->name); | |
605 | ||
623369e5 DV |
606 | /* |
607 | * Each encoder has at most one connector (since we always steal | |
608 | * it away), so we won't call call disable hooks twice. | |
609 | */ | |
610 | if (encoder->bridge) | |
611 | encoder->bridge->funcs->disable(encoder->bridge); | |
612 | ||
613 | /* Right function depends upon target state. */ | |
ee0a89cf | 614 | if (connector->state->crtc && funcs->prepare) |
623369e5 DV |
615 | funcs->prepare(encoder); |
616 | else if (funcs->disable) | |
617 | funcs->disable(encoder); | |
618 | else | |
619 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
620 | ||
621 | if (encoder->bridge) | |
622 | encoder->bridge->funcs->post_disable(encoder->bridge); | |
623 | } | |
624 | ||
625 | for (i = 0; i < ncrtcs; i++) { | |
626 | struct drm_crtc_helper_funcs *funcs; | |
627 | struct drm_crtc *crtc; | |
eab3bbef | 628 | struct drm_crtc_state *old_crtc_state; |
623369e5 DV |
629 | |
630 | crtc = old_state->crtcs[i]; | |
eab3bbef | 631 | old_crtc_state = old_state->crtc_states[i]; |
623369e5 DV |
632 | |
633 | /* Shut down everything that needs a full modeset. */ | |
eab3bbef DV |
634 | if (!crtc || !needs_modeset(crtc->state)) |
635 | continue; | |
636 | ||
637 | if (!old_crtc_state->active) | |
623369e5 DV |
638 | continue; |
639 | ||
640 | funcs = crtc->helper_private; | |
641 | ||
95d6eb3b DV |
642 | DRM_DEBUG_KMS("disabling [CRTC:%d]\n", |
643 | crtc->base.id); | |
644 | ||
645 | ||
623369e5 | 646 | /* Right function depends upon target state. */ |
ee0a89cf | 647 | if (crtc->state->enable && funcs->prepare) |
623369e5 DV |
648 | funcs->prepare(crtc); |
649 | else if (funcs->disable) | |
650 | funcs->disable(crtc); | |
651 | else | |
652 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
653 | } | |
654 | } | |
655 | ||
656 | static void | |
657 | set_routing_links(struct drm_device *dev, struct drm_atomic_state *old_state) | |
658 | { | |
623369e5 DV |
659 | int ncrtcs = old_state->dev->mode_config.num_crtc; |
660 | int i; | |
661 | ||
662 | /* clear out existing links */ | |
f52b69f1 | 663 | for (i = 0; i < old_state->num_connector; i++) { |
623369e5 DV |
664 | struct drm_connector *connector; |
665 | ||
666 | connector = old_state->connectors[i]; | |
667 | ||
668 | if (!connector || !connector->encoder) | |
669 | continue; | |
670 | ||
671 | WARN_ON(!connector->encoder->crtc); | |
672 | ||
673 | connector->encoder->crtc = NULL; | |
674 | connector->encoder = NULL; | |
675 | } | |
676 | ||
677 | /* set new links */ | |
f52b69f1 | 678 | for (i = 0; i < old_state->num_connector; i++) { |
623369e5 DV |
679 | struct drm_connector *connector; |
680 | ||
681 | connector = old_state->connectors[i]; | |
682 | ||
683 | if (!connector || !connector->state->crtc) | |
684 | continue; | |
685 | ||
686 | if (WARN_ON(!connector->state->best_encoder)) | |
687 | continue; | |
688 | ||
689 | connector->encoder = connector->state->best_encoder; | |
690 | connector->encoder->crtc = connector->state->crtc; | |
691 | } | |
692 | ||
693 | /* set legacy state in the crtc structure */ | |
694 | for (i = 0; i < ncrtcs; i++) { | |
695 | struct drm_crtc *crtc; | |
696 | ||
697 | crtc = old_state->crtcs[i]; | |
698 | ||
699 | if (!crtc) | |
700 | continue; | |
701 | ||
702 | crtc->mode = crtc->state->mode; | |
703 | crtc->enabled = crtc->state->enable; | |
704 | crtc->x = crtc->primary->state->src_x >> 16; | |
705 | crtc->y = crtc->primary->state->src_y >> 16; | |
706 | } | |
707 | } | |
708 | ||
709 | static void | |
710 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
711 | { | |
712 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
623369e5 DV |
713 | int i; |
714 | ||
715 | for (i = 0; i < ncrtcs; i++) { | |
716 | struct drm_crtc_helper_funcs *funcs; | |
717 | struct drm_crtc *crtc; | |
718 | ||
719 | crtc = old_state->crtcs[i]; | |
720 | ||
721 | if (!crtc || !crtc->state->mode_changed) | |
722 | continue; | |
723 | ||
724 | funcs = crtc->helper_private; | |
725 | ||
95d6eb3b DV |
726 | if (crtc->state->enable) { |
727 | DRM_DEBUG_KMS("modeset on [CRTC:%d]\n", | |
728 | crtc->base.id); | |
729 | ||
623369e5 | 730 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 731 | } |
623369e5 DV |
732 | } |
733 | ||
f52b69f1 | 734 | for (i = 0; i < old_state->num_connector; i++) { |
623369e5 DV |
735 | struct drm_connector *connector; |
736 | struct drm_crtc_state *new_crtc_state; | |
737 | struct drm_encoder_helper_funcs *funcs; | |
738 | struct drm_encoder *encoder; | |
739 | struct drm_display_mode *mode, *adjusted_mode; | |
740 | ||
741 | connector = old_state->connectors[i]; | |
742 | ||
743 | if (!connector || !connector->state->best_encoder) | |
744 | continue; | |
745 | ||
746 | encoder = connector->state->best_encoder; | |
747 | funcs = encoder->helper_private; | |
748 | new_crtc_state = connector->state->crtc->state; | |
749 | mode = &new_crtc_state->mode; | |
750 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
751 | ||
eab3bbef DV |
752 | if (!new_crtc_state->mode_changed) |
753 | continue; | |
754 | ||
95d6eb3b DV |
755 | DRM_DEBUG_KMS("modeset on [ENCODER:%d:%s]\n", |
756 | encoder->base.id, encoder->name); | |
757 | ||
623369e5 DV |
758 | /* |
759 | * Each encoder has at most one connector (since we always steal | |
760 | * it away), so we won't call call mode_set hooks twice. | |
761 | */ | |
762 | funcs->mode_set(encoder, mode, adjusted_mode); | |
763 | ||
764 | if (encoder->bridge && encoder->bridge->funcs->mode_set) | |
765 | encoder->bridge->funcs->mode_set(encoder->bridge, | |
766 | mode, adjusted_mode); | |
767 | } | |
768 | } | |
769 | ||
770 | /** | |
771 | * drm_atomic_helper_commit_pre_planes - modeset commit before plane updates | |
772 | * @dev: DRM device | |
773 | * @state: atomic state | |
774 | * | |
775 | * This function commits the modeset changes that need to be committed before | |
776 | * updating planes. It shuts down all the outputs that need to be shut down and | |
777 | * prepares them (if required) with the new mode. | |
778 | */ | |
779 | void drm_atomic_helper_commit_pre_planes(struct drm_device *dev, | |
780 | struct drm_atomic_state *state) | |
781 | { | |
782 | disable_outputs(dev, state); | |
783 | set_routing_links(dev, state); | |
784 | crtc_set_mode(dev, state); | |
785 | } | |
786 | EXPORT_SYMBOL(drm_atomic_helper_commit_pre_planes); | |
787 | ||
788 | /** | |
789 | * drm_atomic_helper_commit_post_planes - modeset commit after plane updates | |
790 | * @dev: DRM device | |
791 | * @old_state: atomic state object with old state structures | |
792 | * | |
793 | * This function commits the modeset changes that need to be committed after | |
794 | * updating planes: It enables all the outputs with the new configuration which | |
795 | * had to be turned off for the update. | |
796 | */ | |
797 | void drm_atomic_helper_commit_post_planes(struct drm_device *dev, | |
798 | struct drm_atomic_state *old_state) | |
799 | { | |
800 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
623369e5 DV |
801 | int i; |
802 | ||
803 | for (i = 0; i < ncrtcs; i++) { | |
804 | struct drm_crtc_helper_funcs *funcs; | |
805 | struct drm_crtc *crtc; | |
806 | ||
807 | crtc = old_state->crtcs[i]; | |
808 | ||
809 | /* Need to filter out CRTCs where only planes change. */ | |
eab3bbef DV |
810 | if (!crtc || !needs_modeset(crtc->state)) |
811 | continue; | |
812 | ||
813 | if (!crtc->state->active) | |
623369e5 DV |
814 | continue; |
815 | ||
816 | funcs = crtc->helper_private; | |
817 | ||
ee0a89cf | 818 | if (crtc->state->enable) { |
95d6eb3b DV |
819 | DRM_DEBUG_KMS("enabling [CRTC:%d]\n", |
820 | crtc->base.id); | |
821 | ||
ee0a89cf DV |
822 | if (funcs->enable) |
823 | funcs->enable(crtc); | |
824 | else | |
825 | funcs->commit(crtc); | |
826 | } | |
623369e5 DV |
827 | } |
828 | ||
f52b69f1 | 829 | for (i = 0; i < old_state->num_connector; i++) { |
623369e5 DV |
830 | struct drm_connector *connector; |
831 | struct drm_encoder_helper_funcs *funcs; | |
832 | struct drm_encoder *encoder; | |
833 | ||
834 | connector = old_state->connectors[i]; | |
835 | ||
836 | if (!connector || !connector->state->best_encoder) | |
837 | continue; | |
838 | ||
eab3bbef DV |
839 | if (!connector->state->crtc->state->active) |
840 | continue; | |
841 | ||
623369e5 DV |
842 | encoder = connector->state->best_encoder; |
843 | funcs = encoder->helper_private; | |
844 | ||
95d6eb3b DV |
845 | DRM_DEBUG_KMS("enabling [ENCODER:%d:%s]\n", |
846 | encoder->base.id, encoder->name); | |
847 | ||
623369e5 DV |
848 | /* |
849 | * Each encoder has at most one connector (since we always steal | |
850 | * it away), so we won't call call enable hooks twice. | |
851 | */ | |
852 | if (encoder->bridge) | |
853 | encoder->bridge->funcs->pre_enable(encoder->bridge); | |
854 | ||
ee0a89cf DV |
855 | if (funcs->enable) |
856 | funcs->enable(encoder); | |
857 | else | |
858 | funcs->commit(encoder); | |
623369e5 DV |
859 | |
860 | if (encoder->bridge) | |
861 | encoder->bridge->funcs->enable(encoder->bridge); | |
862 | } | |
863 | } | |
864 | EXPORT_SYMBOL(drm_atomic_helper_commit_post_planes); | |
865 | ||
e2330f07 DV |
866 | static void wait_for_fences(struct drm_device *dev, |
867 | struct drm_atomic_state *state) | |
868 | { | |
869 | int nplanes = dev->mode_config.num_total_plane; | |
870 | int i; | |
871 | ||
872 | for (i = 0; i < nplanes; i++) { | |
873 | struct drm_plane *plane = state->planes[i]; | |
874 | ||
875 | if (!plane || !plane->state->fence) | |
876 | continue; | |
877 | ||
878 | WARN_ON(!plane->state->fb); | |
879 | ||
880 | fence_wait(plane->state->fence, false); | |
881 | fence_put(plane->state->fence); | |
882 | plane->state->fence = NULL; | |
883 | } | |
884 | } | |
885 | ||
ab58e338 DV |
886 | static bool framebuffer_changed(struct drm_device *dev, |
887 | struct drm_atomic_state *old_state, | |
888 | struct drm_crtc *crtc) | |
889 | { | |
890 | struct drm_plane *plane; | |
891 | struct drm_plane_state *old_plane_state; | |
892 | int nplanes = old_state->dev->mode_config.num_total_plane; | |
893 | int i; | |
894 | ||
895 | for (i = 0; i < nplanes; i++) { | |
896 | plane = old_state->planes[i]; | |
897 | old_plane_state = old_state->plane_states[i]; | |
898 | ||
899 | if (!plane) | |
900 | continue; | |
901 | ||
902 | if (plane->state->crtc != crtc && | |
903 | old_plane_state->crtc != crtc) | |
904 | continue; | |
905 | ||
906 | if (plane->state->fb != old_plane_state->fb) | |
907 | return true; | |
908 | } | |
909 | ||
910 | return false; | |
911 | } | |
912 | ||
5ee3229c RC |
913 | /** |
914 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
915 | * @dev: DRM device | |
916 | * @old_state: atomic state object with old state structures | |
917 | * | |
918 | * Helper to, after atomic commit, wait for vblanks on all effected | |
919 | * crtcs (ie. before cleaning up old framebuffers using | |
ab58e338 DV |
920 | * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
921 | * framebuffers have actually changed to optimize for the legacy cursor and | |
922 | * plane update use-case. | |
5ee3229c RC |
923 | */ |
924 | void | |
925 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
926 | struct drm_atomic_state *old_state) | |
623369e5 DV |
927 | { |
928 | struct drm_crtc *crtc; | |
929 | struct drm_crtc_state *old_crtc_state; | |
930 | int ncrtcs = old_state->dev->mode_config.num_crtc; | |
931 | int i, ret; | |
932 | ||
933 | for (i = 0; i < ncrtcs; i++) { | |
934 | crtc = old_state->crtcs[i]; | |
935 | old_crtc_state = old_state->crtc_states[i]; | |
936 | ||
937 | if (!crtc) | |
938 | continue; | |
939 | ||
940 | /* No one cares about the old state, so abuse it for tracking | |
941 | * and store whether we hold a vblank reference (and should do a | |
942 | * vblank wait) in the ->enable boolean. */ | |
943 | old_crtc_state->enable = false; | |
944 | ||
945 | if (!crtc->state->enable) | |
946 | continue; | |
947 | ||
f02ad907 DV |
948 | /* Legacy cursor ioctls are completely unsynced, and userspace |
949 | * relies on that (by doing tons of cursor updates). */ | |
950 | if (old_state->legacy_cursor_update) | |
951 | continue; | |
952 | ||
ab58e338 DV |
953 | if (!framebuffer_changed(dev, old_state, crtc)) |
954 | continue; | |
955 | ||
623369e5 DV |
956 | ret = drm_crtc_vblank_get(crtc); |
957 | if (ret != 0) | |
958 | continue; | |
959 | ||
960 | old_crtc_state->enable = true; | |
961 | old_crtc_state->last_vblank_count = drm_vblank_count(dev, i); | |
962 | } | |
963 | ||
964 | for (i = 0; i < ncrtcs; i++) { | |
965 | crtc = old_state->crtcs[i]; | |
966 | old_crtc_state = old_state->crtc_states[i]; | |
967 | ||
968 | if (!crtc || !old_crtc_state->enable) | |
969 | continue; | |
970 | ||
971 | ret = wait_event_timeout(dev->vblank[i].queue, | |
972 | old_crtc_state->last_vblank_count != | |
973 | drm_vblank_count(dev, i), | |
974 | msecs_to_jiffies(50)); | |
975 | ||
976 | drm_crtc_vblank_put(crtc); | |
977 | } | |
978 | } | |
5ee3229c | 979 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 DV |
980 | |
981 | /** | |
982 | * drm_atomic_helper_commit - commit validated state object | |
983 | * @dev: DRM device | |
984 | * @state: the driver state object | |
985 | * @async: asynchronous commit | |
986 | * | |
987 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
988 | * object. This can still fail when e.g. the framebuffer reservation fails. For | |
989 | * now this doesn't implement asynchronous commits. | |
990 | * | |
991 | * RETURNS | |
992 | * Zero for success or -errno. | |
993 | */ | |
994 | int drm_atomic_helper_commit(struct drm_device *dev, | |
995 | struct drm_atomic_state *state, | |
996 | bool async) | |
997 | { | |
998 | int ret; | |
999 | ||
1000 | if (async) | |
1001 | return -EBUSY; | |
1002 | ||
1003 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
1004 | if (ret) | |
1005 | return ret; | |
1006 | ||
1007 | /* | |
1008 | * This is the point of no return - everything below never fails except | |
1009 | * when the hw goes bonghits. Which means we can commit the new state on | |
1010 | * the software side now. | |
1011 | */ | |
1012 | ||
1013 | drm_atomic_helper_swap_state(dev, state); | |
1014 | ||
1015 | /* | |
1016 | * Everything below can be run asynchronously without the need to grab | |
1017 | * any modeset locks at all under one conditions: It must be guaranteed | |
1018 | * that the asynchronous work has either been cancelled (if the driver | |
1019 | * supports it, which at least requires that the framebuffers get | |
1020 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
1021 | * before the new state gets committed on the software side with | |
1022 | * drm_atomic_helper_swap_state(). | |
1023 | * | |
1024 | * This scheme allows new atomic state updates to be prepared and | |
1025 | * checked in parallel to the asynchronous completion of the previous | |
1026 | * update. Which is important since compositors need to figure out the | |
1027 | * composition of the next frame right after having submitted the | |
1028 | * current layout. | |
1029 | */ | |
1030 | ||
e2330f07 DV |
1031 | wait_for_fences(dev, state); |
1032 | ||
623369e5 DV |
1033 | drm_atomic_helper_commit_pre_planes(dev, state); |
1034 | ||
1035 | drm_atomic_helper_commit_planes(dev, state); | |
1036 | ||
1037 | drm_atomic_helper_commit_post_planes(dev, state); | |
1038 | ||
5ee3229c | 1039 | drm_atomic_helper_wait_for_vblanks(dev, state); |
623369e5 DV |
1040 | |
1041 | drm_atomic_helper_cleanup_planes(dev, state); | |
1042 | ||
1043 | drm_atomic_state_free(state); | |
1044 | ||
1045 | return 0; | |
1046 | } | |
1047 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1048 | ||
e8c833a7 DV |
1049 | /** |
1050 | * DOC: implementing async commit | |
1051 | * | |
1052 | * For now the atomic helpers don't support async commit directly. If there is | |
1053 | * real need it could be added though, using the dma-buf fence infrastructure | |
1054 | * for generic synchronization with outstanding rendering. | |
1055 | * | |
1056 | * For now drivers have to implement async commit themselves, with the following | |
1057 | * sequence being the recommended one: | |
1058 | * | |
1059 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
1060 | * which commit needs to call which can fail, so we want to run it first and | |
1061 | * synchronously. | |
1062 | * | |
1063 | * 2. Synchronize with any outstanding asynchronous commit worker threads which | |
1064 | * might be affected the new state update. This can be done by either cancelling | |
1065 | * or flushing the work items, depending upon whether the driver can deal with | |
1066 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
1067 | * cleanup is still done when cancelling. | |
1068 | * | |
1069 | * For sufficient parallelism it is recommended to have a work item per crtc | |
1070 | * (for updates which don't touch global state) and a global one. Then we only | |
1071 | * need to synchronize with the crtc work items for changed crtcs and the global | |
1072 | * work item, which allows nice concurrent updates on disjoint sets of crtcs. | |
1073 | * | |
1074 | * 3. The software state is updated synchronously with | |
1075 | * drm_atomic_helper_swap_state. Doing this under the protection of all modeset | |
1076 | * locks means concurrent callers never see inconsistent state. And doing this | |
1077 | * while it's guaranteed that no relevant async worker runs means that async | |
1078 | * workers do not need grab any locks. Actually they must not grab locks, for | |
1079 | * otherwise the work flushing will deadlock. | |
1080 | * | |
1081 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1082 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1083 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
1084 | * being displayed. | |
1085 | */ | |
1086 | ||
c2fcd274 DV |
1087 | /** |
1088 | * drm_atomic_helper_prepare_planes - prepare plane resources after commit | |
1089 | * @dev: DRM device | |
1090 | * @state: atomic state object with old state structures | |
1091 | * | |
1092 | * This function prepares plane state, specifically framebuffers, for the new | |
1093 | * configuration. If any failure is encountered this function will call | |
1094 | * ->cleanup_fb on any already successfully prepared framebuffer. | |
1095 | * | |
1096 | * Returns: | |
1097 | * 0 on success, negative error code on failure. | |
1098 | */ | |
1099 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
1100 | struct drm_atomic_state *state) | |
1101 | { | |
1102 | int nplanes = dev->mode_config.num_total_plane; | |
1103 | int ret, i; | |
1104 | ||
1105 | for (i = 0; i < nplanes; i++) { | |
1106 | struct drm_plane_helper_funcs *funcs; | |
1107 | struct drm_plane *plane = state->planes[i]; | |
1108 | struct drm_framebuffer *fb; | |
1109 | ||
1110 | if (!plane) | |
1111 | continue; | |
1112 | ||
1113 | funcs = plane->helper_private; | |
1114 | ||
1115 | fb = state->plane_states[i]->fb; | |
1116 | ||
1117 | if (fb && funcs->prepare_fb) { | |
1118 | ret = funcs->prepare_fb(plane, fb); | |
1119 | if (ret) | |
1120 | goto fail; | |
1121 | } | |
1122 | } | |
1123 | ||
1124 | return 0; | |
1125 | ||
1126 | fail: | |
1127 | for (i--; i >= 0; i--) { | |
1128 | struct drm_plane_helper_funcs *funcs; | |
1129 | struct drm_plane *plane = state->planes[i]; | |
1130 | struct drm_framebuffer *fb; | |
1131 | ||
1132 | if (!plane) | |
1133 | continue; | |
1134 | ||
1135 | funcs = plane->helper_private; | |
1136 | ||
1137 | fb = state->plane_states[i]->fb; | |
1138 | ||
1139 | if (fb && funcs->cleanup_fb) | |
1140 | funcs->cleanup_fb(plane, fb); | |
1141 | ||
1142 | } | |
1143 | ||
1144 | return ret; | |
1145 | } | |
1146 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
1147 | ||
1148 | /** | |
1149 | * drm_atomic_helper_commit_planes - commit plane state | |
1150 | * @dev: DRM device | |
b0fcfc89 | 1151 | * @old_state: atomic state object with old state structures |
c2fcd274 DV |
1152 | * |
1153 | * This function commits the new plane state using the plane and atomic helper | |
1154 | * functions for planes and crtcs. It assumes that the atomic state has already | |
1155 | * been pushed into the relevant object state pointers, since this step can no | |
1156 | * longer fail. | |
1157 | * | |
b0fcfc89 | 1158 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 DV |
1159 | * crtcs need to be updated though. |
1160 | */ | |
1161 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
b0fcfc89 | 1162 | struct drm_atomic_state *old_state) |
c2fcd274 DV |
1163 | { |
1164 | int nplanes = dev->mode_config.num_total_plane; | |
1165 | int ncrtcs = dev->mode_config.num_crtc; | |
1166 | int i; | |
1167 | ||
1168 | for (i = 0; i < ncrtcs; i++) { | |
1169 | struct drm_crtc_helper_funcs *funcs; | |
b0fcfc89 | 1170 | struct drm_crtc *crtc = old_state->crtcs[i]; |
c2fcd274 DV |
1171 | |
1172 | if (!crtc) | |
1173 | continue; | |
1174 | ||
1175 | funcs = crtc->helper_private; | |
1176 | ||
1177 | if (!funcs || !funcs->atomic_begin) | |
1178 | continue; | |
1179 | ||
1180 | funcs->atomic_begin(crtc); | |
1181 | } | |
1182 | ||
1183 | for (i = 0; i < nplanes; i++) { | |
1184 | struct drm_plane_helper_funcs *funcs; | |
b0fcfc89 | 1185 | struct drm_plane *plane = old_state->planes[i]; |
f1c37e1a | 1186 | struct drm_plane_state *old_plane_state; |
c2fcd274 DV |
1187 | |
1188 | if (!plane) | |
1189 | continue; | |
1190 | ||
1191 | funcs = plane->helper_private; | |
1192 | ||
3cad4b68 | 1193 | if (!funcs) |
c2fcd274 DV |
1194 | continue; |
1195 | ||
f1c37e1a TR |
1196 | old_plane_state = old_state->plane_states[i]; |
1197 | ||
407b8bd9 TR |
1198 | /* |
1199 | * Special-case disabling the plane if drivers support it. | |
1200 | */ | |
1201 | if (drm_atomic_plane_disabling(plane, old_plane_state) && | |
1202 | funcs->atomic_disable) | |
1203 | funcs->atomic_disable(plane, old_plane_state); | |
1204 | else | |
1205 | funcs->atomic_update(plane, old_plane_state); | |
c2fcd274 DV |
1206 | } |
1207 | ||
1208 | for (i = 0; i < ncrtcs; i++) { | |
1209 | struct drm_crtc_helper_funcs *funcs; | |
b0fcfc89 | 1210 | struct drm_crtc *crtc = old_state->crtcs[i]; |
c2fcd274 DV |
1211 | |
1212 | if (!crtc) | |
1213 | continue; | |
1214 | ||
1215 | funcs = crtc->helper_private; | |
1216 | ||
1217 | if (!funcs || !funcs->atomic_flush) | |
1218 | continue; | |
1219 | ||
1220 | funcs->atomic_flush(crtc); | |
1221 | } | |
1222 | } | |
1223 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1224 | ||
1225 | /** | |
1226 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1227 | * @dev: DRM device | |
1228 | * @old_state: atomic state object with old state structures | |
1229 | * | |
1230 | * This function cleans up plane state, specifically framebuffers, from the old | |
1231 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1232 | * be able to call this function. | |
1233 | * | |
1234 | * This function must also be called on the new state when the atomic update | |
1235 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1236 | */ | |
1237 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1238 | struct drm_atomic_state *old_state) | |
1239 | { | |
1240 | int nplanes = dev->mode_config.num_total_plane; | |
1241 | int i; | |
1242 | ||
1243 | for (i = 0; i < nplanes; i++) { | |
1244 | struct drm_plane_helper_funcs *funcs; | |
1245 | struct drm_plane *plane = old_state->planes[i]; | |
1246 | struct drm_framebuffer *old_fb; | |
1247 | ||
1248 | if (!plane) | |
1249 | continue; | |
1250 | ||
1251 | funcs = plane->helper_private; | |
1252 | ||
1253 | old_fb = old_state->plane_states[i]->fb; | |
1254 | ||
1255 | if (old_fb && funcs->cleanup_fb) | |
1256 | funcs->cleanup_fb(plane, old_fb); | |
1257 | } | |
1258 | } | |
1259 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1260 | ||
1261 | /** | |
1262 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
1263 | * @dev: DRM device | |
1264 | * @state: atomic state | |
1265 | * | |
1266 | * This function stores the atomic state into the current state pointers in all | |
1267 | * driver objects. It should be called after all failing steps have been done | |
1268 | * and succeeded, but before the actual hardware state is committed. | |
1269 | * | |
1270 | * For cleanup and error recovery the current state for all changed objects will | |
1271 | * be swaped into @state. | |
1272 | * | |
1273 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1274 | * | |
1275 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1276 | * | |
1277 | * 2. Do any other steps that might fail. | |
1278 | * | |
1279 | * 3. Put the staged state into the current state pointers with this function. | |
1280 | * | |
1281 | * 4. Actually commit the hardware state. | |
1282 | * | |
1283 | * 5. Call drm_atomic_helper_cleanup_planes with @state, which since step 3 | |
1284 | * contains the old state. Also do any other cleanup required with that state. | |
1285 | */ | |
1286 | void drm_atomic_helper_swap_state(struct drm_device *dev, | |
1287 | struct drm_atomic_state *state) | |
1288 | { | |
1289 | int i; | |
1290 | ||
1291 | for (i = 0; i < dev->mode_config.num_connector; i++) { | |
1292 | struct drm_connector *connector = state->connectors[i]; | |
1293 | ||
1294 | if (!connector) | |
1295 | continue; | |
1296 | ||
1297 | connector->state->state = state; | |
1298 | swap(state->connector_states[i], connector->state); | |
1299 | connector->state->state = NULL; | |
1300 | } | |
1301 | ||
1302 | for (i = 0; i < dev->mode_config.num_crtc; i++) { | |
1303 | struct drm_crtc *crtc = state->crtcs[i]; | |
1304 | ||
1305 | if (!crtc) | |
1306 | continue; | |
1307 | ||
1308 | crtc->state->state = state; | |
1309 | swap(state->crtc_states[i], crtc->state); | |
1310 | crtc->state->state = NULL; | |
1311 | } | |
1312 | ||
1313 | for (i = 0; i < dev->mode_config.num_total_plane; i++) { | |
1314 | struct drm_plane *plane = state->planes[i]; | |
1315 | ||
1316 | if (!plane) | |
1317 | continue; | |
1318 | ||
1319 | plane->state->state = state; | |
1320 | swap(state->plane_states[i], plane->state); | |
1321 | plane->state->state = NULL; | |
1322 | } | |
1323 | } | |
1324 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
1325 | |
1326 | /** | |
1327 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
1328 | * @plane: plane object to update | |
1329 | * @crtc: owning CRTC of owning plane | |
1330 | * @fb: framebuffer to flip onto plane | |
1331 | * @crtc_x: x offset of primary plane on crtc | |
1332 | * @crtc_y: y offset of primary plane on crtc | |
1333 | * @crtc_w: width of primary plane rectangle on crtc | |
1334 | * @crtc_h: height of primary plane rectangle on crtc | |
1335 | * @src_x: x offset of @fb for panning | |
1336 | * @src_y: y offset of @fb for panning | |
1337 | * @src_w: width of source rectangle in @fb | |
1338 | * @src_h: height of source rectangle in @fb | |
1339 | * | |
1340 | * Provides a default plane update handler using the atomic driver interface. | |
1341 | * | |
1342 | * RETURNS: | |
1343 | * Zero on success, error code on failure | |
1344 | */ | |
1345 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
1346 | struct drm_crtc *crtc, | |
1347 | struct drm_framebuffer *fb, | |
1348 | int crtc_x, int crtc_y, | |
1349 | unsigned int crtc_w, unsigned int crtc_h, | |
1350 | uint32_t src_x, uint32_t src_y, | |
1351 | uint32_t src_w, uint32_t src_h) | |
1352 | { | |
1353 | struct drm_atomic_state *state; | |
1354 | struct drm_plane_state *plane_state; | |
1355 | int ret = 0; | |
1356 | ||
1357 | state = drm_atomic_state_alloc(plane->dev); | |
1358 | if (!state) | |
1359 | return -ENOMEM; | |
1360 | ||
1361 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1362 | retry: | |
1363 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1364 | if (IS_ERR(plane_state)) { | |
1365 | ret = PTR_ERR(plane_state); | |
1366 | goto fail; | |
1367 | } | |
1368 | ||
07cc0ef6 | 1369 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
1370 | if (ret != 0) |
1371 | goto fail; | |
321ebf04 | 1372 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
1373 | plane_state->crtc_x = crtc_x; |
1374 | plane_state->crtc_y = crtc_y; | |
1375 | plane_state->crtc_h = crtc_h; | |
1376 | plane_state->crtc_w = crtc_w; | |
1377 | plane_state->src_x = src_x; | |
1378 | plane_state->src_y = src_y; | |
1379 | plane_state->src_h = src_h; | |
1380 | plane_state->src_w = src_w; | |
1381 | ||
1382 | ret = drm_atomic_commit(state); | |
1383 | if (ret != 0) | |
1384 | goto fail; | |
1385 | ||
f02ad907 DV |
1386 | if (plane == crtc->cursor) |
1387 | state->legacy_cursor_update = true; | |
1388 | ||
042652ed DV |
1389 | /* Driver takes ownership of state on successful commit. */ |
1390 | return 0; | |
1391 | fail: | |
1392 | if (ret == -EDEADLK) | |
1393 | goto backoff; | |
1394 | ||
1395 | drm_atomic_state_free(state); | |
1396 | ||
1397 | return ret; | |
1398 | backoff: | |
042652ed | 1399 | drm_atomic_state_clear(state); |
6f75cea6 | 1400 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1401 | |
1402 | /* | |
1403 | * Someone might have exchanged the framebuffer while we dropped locks | |
1404 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1405 | * core does for us. | |
1406 | */ | |
1407 | plane->old_fb = plane->fb; | |
1408 | ||
1409 | goto retry; | |
1410 | } | |
1411 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
1412 | ||
1413 | /** | |
1414 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
1415 | * @plane: plane to disable | |
1416 | * | |
1417 | * Provides a default plane disable handler using the atomic driver interface. | |
1418 | * | |
1419 | * RETURNS: | |
1420 | * Zero on success, error code on failure | |
1421 | */ | |
1422 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
1423 | { | |
1424 | struct drm_atomic_state *state; | |
1425 | struct drm_plane_state *plane_state; | |
1426 | int ret = 0; | |
1427 | ||
aa54e2ee JSP |
1428 | /* |
1429 | * FIXME: Without plane->crtc set we can't get at the implicit legacy | |
1430 | * acquire context. The real fix will be to wire the acquire ctx through | |
1431 | * everywhere we need it, but meanwhile prevent chaos by just skipping | |
1432 | * this noop. The critical case is the cursor ioctls which a) only grab | |
1433 | * crtc/cursor-plane locks (so we need the crtc to get at the right | |
1434 | * acquire context) and b) can try to disable the plane multiple times. | |
1435 | */ | |
1436 | if (!plane->crtc) | |
1437 | return 0; | |
1438 | ||
042652ed DV |
1439 | state = drm_atomic_state_alloc(plane->dev); |
1440 | if (!state) | |
1441 | return -ENOMEM; | |
1442 | ||
1443 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
1444 | retry: | |
1445 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1446 | if (IS_ERR(plane_state)) { | |
1447 | ret = PTR_ERR(plane_state); | |
1448 | goto fail; | |
1449 | } | |
1450 | ||
07cc0ef6 | 1451 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); |
042652ed DV |
1452 | if (ret != 0) |
1453 | goto fail; | |
321ebf04 | 1454 | drm_atomic_set_fb_for_plane(plane_state, NULL); |
042652ed DV |
1455 | plane_state->crtc_x = 0; |
1456 | plane_state->crtc_y = 0; | |
1457 | plane_state->crtc_h = 0; | |
1458 | plane_state->crtc_w = 0; | |
1459 | plane_state->src_x = 0; | |
1460 | plane_state->src_y = 0; | |
1461 | plane_state->src_h = 0; | |
1462 | plane_state->src_w = 0; | |
1463 | ||
f02ad907 DV |
1464 | if (plane == plane->crtc->cursor) |
1465 | state->legacy_cursor_update = true; | |
1466 | ||
042652ed DV |
1467 | ret = drm_atomic_commit(state); |
1468 | if (ret != 0) | |
1469 | goto fail; | |
1470 | ||
1471 | /* Driver takes ownership of state on successful commit. */ | |
1472 | return 0; | |
1473 | fail: | |
1474 | if (ret == -EDEADLK) | |
1475 | goto backoff; | |
1476 | ||
1477 | drm_atomic_state_free(state); | |
1478 | ||
1479 | return ret; | |
1480 | backoff: | |
042652ed | 1481 | drm_atomic_state_clear(state); |
6f75cea6 | 1482 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1483 | |
1484 | /* | |
1485 | * Someone might have exchanged the framebuffer while we dropped locks | |
1486 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1487 | * core does for us. | |
1488 | */ | |
1489 | plane->old_fb = plane->fb; | |
1490 | ||
1491 | goto retry; | |
1492 | } | |
1493 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
1494 | ||
1495 | static int update_output_state(struct drm_atomic_state *state, | |
1496 | struct drm_mode_set *set) | |
1497 | { | |
1498 | struct drm_device *dev = set->crtc->dev; | |
1499 | struct drm_connector_state *conn_state; | |
042652ed DV |
1500 | int ncrtcs = state->dev->mode_config.num_crtc; |
1501 | int ret, i, j; | |
1502 | ||
1503 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
1504 | state->acquire_ctx); | |
1505 | if (ret) | |
1506 | return ret; | |
1507 | ||
1508 | /* First grab all affected connector/crtc states. */ | |
1509 | for (i = 0; i < set->num_connectors; i++) { | |
1510 | conn_state = drm_atomic_get_connector_state(state, | |
1511 | set->connectors[i]); | |
1512 | if (IS_ERR(conn_state)) | |
1513 | return PTR_ERR(conn_state); | |
1514 | } | |
1515 | ||
1516 | for (i = 0; i < ncrtcs; i++) { | |
1517 | struct drm_crtc *crtc = state->crtcs[i]; | |
1518 | ||
1519 | if (!crtc) | |
1520 | continue; | |
1521 | ||
1522 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
1523 | if (ret) | |
1524 | return ret; | |
1525 | } | |
1526 | ||
1527 | /* Then recompute connector->crtc links and crtc enabling state. */ | |
f52b69f1 | 1528 | for (i = 0; i < state->num_connector; i++) { |
042652ed DV |
1529 | struct drm_connector *connector; |
1530 | ||
1531 | connector = state->connectors[i]; | |
1532 | conn_state = state->connector_states[i]; | |
1533 | ||
1534 | if (!connector) | |
1535 | continue; | |
1536 | ||
1537 | if (conn_state->crtc == set->crtc) { | |
1538 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1539 | NULL); | |
1540 | if (ret) | |
1541 | return ret; | |
1542 | } | |
1543 | ||
1544 | for (j = 0; j < set->num_connectors; j++) { | |
1545 | if (set->connectors[j] == connector) { | |
1546 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1547 | set->crtc); | |
1548 | if (ret) | |
1549 | return ret; | |
1550 | break; | |
1551 | } | |
1552 | } | |
1553 | } | |
1554 | ||
1555 | for (i = 0; i < ncrtcs; i++) { | |
1556 | struct drm_crtc *crtc = state->crtcs[i]; | |
1557 | struct drm_crtc_state *crtc_state = state->crtc_states[i]; | |
1558 | ||
1559 | if (!crtc) | |
1560 | continue; | |
1561 | ||
1562 | /* Don't update ->enable for the CRTC in the set_config request, | |
1563 | * since a mismatch would indicate a bug in the upper layers. | |
1564 | * The actual modeset code later on will catch any | |
1565 | * inconsistencies here. */ | |
1566 | if (crtc == set->crtc) | |
1567 | continue; | |
1568 | ||
1569 | crtc_state->enable = | |
1570 | drm_atomic_connectors_for_crtc(state, crtc); | |
1571 | } | |
1572 | ||
1573 | return 0; | |
1574 | } | |
1575 | ||
1576 | /** | |
1577 | * drm_atomic_helper_set_config - set a new config from userspace | |
1578 | * @set: mode set configuration | |
1579 | * | |
1580 | * Provides a default crtc set_config handler using the atomic driver interface. | |
1581 | * | |
1582 | * Returns: | |
1583 | * Returns 0 on success, negative errno numbers on failure. | |
1584 | */ | |
1585 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
1586 | { | |
1587 | struct drm_atomic_state *state; | |
1588 | struct drm_crtc *crtc = set->crtc; | |
1589 | struct drm_crtc_state *crtc_state; | |
1590 | struct drm_plane_state *primary_state; | |
1591 | int ret = 0; | |
1592 | ||
1593 | state = drm_atomic_state_alloc(crtc->dev); | |
1594 | if (!state) | |
1595 | return -ENOMEM; | |
1596 | ||
1597 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1598 | retry: | |
1599 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1600 | if (IS_ERR(crtc_state)) { | |
1601 | ret = PTR_ERR(crtc_state); | |
1602 | goto fail; | |
1603 | } | |
1604 | ||
e5b5341c RC |
1605 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); |
1606 | if (IS_ERR(primary_state)) { | |
1607 | ret = PTR_ERR(primary_state); | |
1608 | goto fail; | |
1609 | } | |
1610 | ||
042652ed DV |
1611 | if (!set->mode) { |
1612 | WARN_ON(set->fb); | |
1613 | WARN_ON(set->num_connectors); | |
1614 | ||
1615 | crtc_state->enable = false; | |
eab3bbef | 1616 | crtc_state->active = false; |
e5b5341c | 1617 | |
07cc0ef6 | 1618 | ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
e5b5341c RC |
1619 | if (ret != 0) |
1620 | goto fail; | |
1621 | ||
1622 | drm_atomic_set_fb_for_plane(primary_state, NULL); | |
1623 | ||
042652ed DV |
1624 | goto commit; |
1625 | } | |
1626 | ||
1627 | WARN_ON(!set->fb); | |
1628 | WARN_ON(!set->num_connectors); | |
1629 | ||
1630 | crtc_state->enable = true; | |
eab3bbef | 1631 | crtc_state->active = true; |
042652ed DV |
1632 | drm_mode_copy(&crtc_state->mode, set->mode); |
1633 | ||
07cc0ef6 | 1634 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
042652ed DV |
1635 | if (ret != 0) |
1636 | goto fail; | |
321ebf04 | 1637 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
042652ed DV |
1638 | primary_state->crtc_x = 0; |
1639 | primary_state->crtc_y = 0; | |
1640 | primary_state->crtc_h = set->mode->vdisplay; | |
1641 | primary_state->crtc_w = set->mode->hdisplay; | |
1642 | primary_state->src_x = set->x << 16; | |
1643 | primary_state->src_y = set->y << 16; | |
1644 | primary_state->src_h = set->mode->vdisplay << 16; | |
1645 | primary_state->src_w = set->mode->hdisplay << 16; | |
1646 | ||
1647 | commit: | |
1648 | ret = update_output_state(state, set); | |
1649 | if (ret) | |
1650 | goto fail; | |
1651 | ||
1652 | ret = drm_atomic_commit(state); | |
1653 | if (ret != 0) | |
1654 | goto fail; | |
1655 | ||
1656 | /* Driver takes ownership of state on successful commit. */ | |
1657 | return 0; | |
1658 | fail: | |
1659 | if (ret == -EDEADLK) | |
1660 | goto backoff; | |
1661 | ||
1662 | drm_atomic_state_free(state); | |
1663 | ||
1664 | return ret; | |
1665 | backoff: | |
042652ed | 1666 | drm_atomic_state_clear(state); |
6f75cea6 | 1667 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1668 | |
1669 | /* | |
1670 | * Someone might have exchanged the framebuffer while we dropped locks | |
1671 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1672 | * core does for us. | |
1673 | */ | |
1674 | crtc->primary->old_fb = crtc->primary->fb; | |
1675 | ||
1676 | goto retry; | |
1677 | } | |
1678 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
1679 | ||
1680 | /** | |
1681 | * drm_atomic_helper_crtc_set_property - helper for crtc prorties | |
1682 | * @crtc: DRM crtc | |
1683 | * @property: DRM property | |
1684 | * @val: value of property | |
1685 | * | |
1686 | * Provides a default plane disablle handler using the atomic driver interface. | |
1687 | * | |
1688 | * RETURNS: | |
1689 | * Zero on success, error code on failure | |
1690 | */ | |
1691 | int | |
1692 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
1693 | struct drm_property *property, | |
1694 | uint64_t val) | |
1695 | { | |
1696 | struct drm_atomic_state *state; | |
1697 | struct drm_crtc_state *crtc_state; | |
1698 | int ret = 0; | |
1699 | ||
1700 | state = drm_atomic_state_alloc(crtc->dev); | |
1701 | if (!state) | |
1702 | return -ENOMEM; | |
1703 | ||
1704 | /* ->set_property is always called with all locks held. */ | |
1705 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
1706 | retry: | |
1707 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1708 | if (IS_ERR(crtc_state)) { | |
1709 | ret = PTR_ERR(crtc_state); | |
1710 | goto fail; | |
1711 | } | |
1712 | ||
40ecc694 RC |
1713 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
1714 | property, val); | |
042652ed DV |
1715 | if (ret) |
1716 | goto fail; | |
1717 | ||
1718 | ret = drm_atomic_commit(state); | |
1719 | if (ret != 0) | |
1720 | goto fail; | |
1721 | ||
1722 | /* Driver takes ownership of state on successful commit. */ | |
1723 | return 0; | |
1724 | fail: | |
1725 | if (ret == -EDEADLK) | |
1726 | goto backoff; | |
1727 | ||
1728 | drm_atomic_state_free(state); | |
1729 | ||
1730 | return ret; | |
1731 | backoff: | |
042652ed | 1732 | drm_atomic_state_clear(state); |
6f75cea6 | 1733 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1734 | |
1735 | goto retry; | |
1736 | } | |
1737 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
1738 | ||
1739 | /** | |
1740 | * drm_atomic_helper_plane_set_property - helper for plane prorties | |
1741 | * @plane: DRM plane | |
1742 | * @property: DRM property | |
1743 | * @val: value of property | |
1744 | * | |
1745 | * Provides a default plane disable handler using the atomic driver interface. | |
1746 | * | |
1747 | * RETURNS: | |
1748 | * Zero on success, error code on failure | |
1749 | */ | |
1750 | int | |
1751 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
1752 | struct drm_property *property, | |
1753 | uint64_t val) | |
1754 | { | |
1755 | struct drm_atomic_state *state; | |
1756 | struct drm_plane_state *plane_state; | |
1757 | int ret = 0; | |
1758 | ||
1759 | state = drm_atomic_state_alloc(plane->dev); | |
1760 | if (!state) | |
1761 | return -ENOMEM; | |
1762 | ||
1763 | /* ->set_property is always called with all locks held. */ | |
1764 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
1765 | retry: | |
1766 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1767 | if (IS_ERR(plane_state)) { | |
1768 | ret = PTR_ERR(plane_state); | |
1769 | goto fail; | |
1770 | } | |
1771 | ||
40ecc694 RC |
1772 | ret = drm_atomic_plane_set_property(plane, plane_state, |
1773 | property, val); | |
042652ed DV |
1774 | if (ret) |
1775 | goto fail; | |
1776 | ||
1777 | ret = drm_atomic_commit(state); | |
1778 | if (ret != 0) | |
1779 | goto fail; | |
1780 | ||
1781 | /* Driver takes ownership of state on successful commit. */ | |
1782 | return 0; | |
1783 | fail: | |
1784 | if (ret == -EDEADLK) | |
1785 | goto backoff; | |
1786 | ||
1787 | drm_atomic_state_free(state); | |
1788 | ||
1789 | return ret; | |
1790 | backoff: | |
042652ed | 1791 | drm_atomic_state_clear(state); |
6f75cea6 | 1792 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1793 | |
1794 | goto retry; | |
1795 | } | |
1796 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
1797 | ||
1798 | /** | |
1799 | * drm_atomic_helper_connector_set_property - helper for connector prorties | |
1800 | * @connector: DRM connector | |
1801 | * @property: DRM property | |
1802 | * @val: value of property | |
1803 | * | |
1804 | * Provides a default plane disablle handler using the atomic driver interface. | |
1805 | * | |
1806 | * RETURNS: | |
1807 | * Zero on success, error code on failure | |
1808 | */ | |
1809 | int | |
1810 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
1811 | struct drm_property *property, | |
1812 | uint64_t val) | |
1813 | { | |
1814 | struct drm_atomic_state *state; | |
1815 | struct drm_connector_state *connector_state; | |
1816 | int ret = 0; | |
1817 | ||
1818 | state = drm_atomic_state_alloc(connector->dev); | |
1819 | if (!state) | |
1820 | return -ENOMEM; | |
1821 | ||
1822 | /* ->set_property is always called with all locks held. */ | |
1823 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
1824 | retry: | |
1825 | connector_state = drm_atomic_get_connector_state(state, connector); | |
1826 | if (IS_ERR(connector_state)) { | |
1827 | ret = PTR_ERR(connector_state); | |
1828 | goto fail; | |
1829 | } | |
1830 | ||
40ecc694 RC |
1831 | ret = drm_atomic_connector_set_property(connector, connector_state, |
1832 | property, val); | |
042652ed DV |
1833 | if (ret) |
1834 | goto fail; | |
1835 | ||
1836 | ret = drm_atomic_commit(state); | |
1837 | if (ret != 0) | |
1838 | goto fail; | |
1839 | ||
1840 | /* Driver takes ownership of state on successful commit. */ | |
1841 | return 0; | |
1842 | fail: | |
1843 | if (ret == -EDEADLK) | |
1844 | goto backoff; | |
1845 | ||
1846 | drm_atomic_state_free(state); | |
1847 | ||
1848 | return ret; | |
1849 | backoff: | |
042652ed | 1850 | drm_atomic_state_clear(state); |
6f75cea6 | 1851 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1852 | |
1853 | goto retry; | |
1854 | } | |
1855 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 DV |
1856 | |
1857 | /** | |
1858 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
1859 | * @crtc: DRM crtc | |
1860 | * @fb: DRM framebuffer | |
1861 | * @event: optional DRM event to signal upon completion | |
1862 | * @flags: flip flags for non-vblank sync'ed updates | |
1863 | * | |
1864 | * Provides a default page flip implementation using the atomic driver interface. | |
1865 | * | |
1866 | * Note that for now so called async page flips (i.e. updates which are not | |
1867 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
1868 | * no provisions for this yet. | |
1869 | * | |
1870 | * Returns: | |
1871 | * Returns 0 on success, negative errno numbers on failure. | |
1872 | */ | |
1873 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
1874 | struct drm_framebuffer *fb, | |
1875 | struct drm_pending_vblank_event *event, | |
1876 | uint32_t flags) | |
1877 | { | |
1878 | struct drm_plane *plane = crtc->primary; | |
1879 | struct drm_atomic_state *state; | |
1880 | struct drm_plane_state *plane_state; | |
1881 | struct drm_crtc_state *crtc_state; | |
1882 | int ret = 0; | |
1883 | ||
1884 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
1885 | return -EINVAL; | |
1886 | ||
1887 | state = drm_atomic_state_alloc(plane->dev); | |
1888 | if (!state) | |
1889 | return -ENOMEM; | |
1890 | ||
1891 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1892 | retry: | |
1893 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1894 | if (IS_ERR(crtc_state)) { | |
1895 | ret = PTR_ERR(crtc_state); | |
1896 | goto fail; | |
1897 | } | |
1898 | crtc_state->event = event; | |
1899 | ||
1900 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1901 | if (IS_ERR(plane_state)) { | |
1902 | ret = PTR_ERR(plane_state); | |
1903 | goto fail; | |
1904 | } | |
1905 | ||
07cc0ef6 | 1906 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
8bc0f312 DV |
1907 | if (ret != 0) |
1908 | goto fail; | |
321ebf04 | 1909 | drm_atomic_set_fb_for_plane(plane_state, fb); |
8bc0f312 DV |
1910 | |
1911 | ret = drm_atomic_async_commit(state); | |
1912 | if (ret != 0) | |
1913 | goto fail; | |
1914 | ||
1915 | /* TODO: ->page_flip is the only driver callback where the core | |
1916 | * doesn't update plane->fb. For now patch it up here. */ | |
1917 | plane->fb = plane->state->fb; | |
1918 | ||
1919 | /* Driver takes ownership of state on successful async commit. */ | |
1920 | return 0; | |
1921 | fail: | |
1922 | if (ret == -EDEADLK) | |
1923 | goto backoff; | |
1924 | ||
1925 | drm_atomic_state_free(state); | |
1926 | ||
1927 | return ret; | |
1928 | backoff: | |
8bc0f312 | 1929 | drm_atomic_state_clear(state); |
6f75cea6 | 1930 | drm_atomic_legacy_backoff(state); |
8bc0f312 DV |
1931 | |
1932 | /* | |
1933 | * Someone might have exchanged the framebuffer while we dropped locks | |
1934 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1935 | * core does for us. | |
1936 | */ | |
1937 | plane->old_fb = plane->fb; | |
1938 | ||
1939 | goto retry; | |
1940 | } | |
1941 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
d461701c | 1942 | |
b486e0e6 DV |
1943 | /** |
1944 | * drm_atomic_helper_connector_dpms() - connector dpms helper implementation | |
1945 | * @connector: affected connector | |
1946 | * @mode: DPMS mode | |
1947 | * | |
1948 | * This is the main helper function provided by the atomic helper framework for | |
1949 | * implementing the legacy DPMS connector interface. It computes the new desired | |
1950 | * ->active state for the corresponding CRTC (if the connector is enabled) and | |
1951 | * updates it. | |
1952 | */ | |
1953 | void drm_atomic_helper_connector_dpms(struct drm_connector *connector, | |
1954 | int mode) | |
1955 | { | |
1956 | struct drm_mode_config *config = &connector->dev->mode_config; | |
1957 | struct drm_atomic_state *state; | |
1958 | struct drm_crtc_state *crtc_state; | |
1959 | struct drm_crtc *crtc; | |
1960 | struct drm_connector *tmp_connector; | |
1961 | int ret; | |
1962 | bool active = false; | |
1963 | ||
1964 | if (mode != DRM_MODE_DPMS_ON) | |
1965 | mode = DRM_MODE_DPMS_OFF; | |
1966 | ||
1967 | connector->dpms = mode; | |
1968 | crtc = connector->state->crtc; | |
1969 | ||
1970 | if (!crtc) | |
1971 | return; | |
1972 | ||
1973 | /* FIXME: ->dpms has no return value so can't forward the -ENOMEM. */ | |
1974 | state = drm_atomic_state_alloc(connector->dev); | |
1975 | if (!state) | |
1976 | return; | |
1977 | ||
1978 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1979 | retry: | |
1980 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1981 | if (IS_ERR(crtc_state)) | |
1982 | return; | |
1983 | ||
1984 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
1985 | ||
1986 | list_for_each_entry(tmp_connector, &config->connector_list, head) { | |
1987 | if (connector->state->crtc != crtc) | |
1988 | continue; | |
1989 | ||
1990 | if (connector->dpms == DRM_MODE_DPMS_ON) { | |
1991 | active = true; | |
1992 | break; | |
1993 | } | |
1994 | } | |
1995 | crtc_state->active = active; | |
1996 | ||
1997 | ret = drm_atomic_commit(state); | |
1998 | if (ret != 0) | |
1999 | goto fail; | |
2000 | ||
2001 | /* Driver takes ownership of state on successful async commit. */ | |
2002 | return; | |
2003 | fail: | |
2004 | if (ret == -EDEADLK) | |
2005 | goto backoff; | |
2006 | ||
2007 | drm_atomic_state_free(state); | |
2008 | ||
2009 | WARN(1, "Driver bug: Changing ->active failed with ret=%i\n", ret); | |
2010 | ||
2011 | return; | |
2012 | backoff: | |
2013 | drm_atomic_state_clear(state); | |
2014 | drm_atomic_legacy_backoff(state); | |
2015 | ||
2016 | goto retry; | |
2017 | } | |
2018 | EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); | |
2019 | ||
3150c7d0 DV |
2020 | /** |
2021 | * DOC: atomic state reset and initialization | |
2022 | * | |
2023 | * Both the drm core and the atomic helpers assume that there is always the full | |
2024 | * and correct atomic software state for all connectors, CRTCs and planes | |
2025 | * available. Which is a bit a problem on driver load and also after system | |
2026 | * suspend. One way to solve this is to have a hardware state read-out | |
2027 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
2028 | * driver). | |
2029 | * | |
2030 | * The simpler solution is to just reset the software state to everything off, | |
2031 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
2032 | * the atomic helpers provide default reset implementations for all hooks. | |
2033 | */ | |
2034 | ||
d461701c DV |
2035 | /** |
2036 | * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs | |
2037 | * @crtc: drm CRTC | |
2038 | * | |
2039 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
2040 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2041 | */ | |
2042 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
2043 | { | |
2044 | kfree(crtc->state); | |
2045 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
07cc0ef6 DV |
2046 | |
2047 | if (crtc->state) | |
2048 | crtc->state->crtc = crtc; | |
d461701c DV |
2049 | } |
2050 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
2051 | ||
2052 | /** | |
2053 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
2054 | * @crtc: drm CRTC | |
2055 | * | |
2056 | * Default CRTC state duplicate hook for drivers which don't have their own | |
2057 | * subclassed CRTC state structure. | |
2058 | */ | |
2059 | struct drm_crtc_state * | |
2060 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
2061 | { | |
2062 | struct drm_crtc_state *state; | |
2063 | ||
2064 | if (WARN_ON(!crtc->state)) | |
2065 | return NULL; | |
2066 | ||
2067 | state = kmemdup(crtc->state, sizeof(*crtc->state), GFP_KERNEL); | |
2068 | ||
2069 | if (state) { | |
2070 | state->mode_changed = false; | |
eab3bbef | 2071 | state->active_changed = false; |
d461701c DV |
2072 | state->planes_changed = false; |
2073 | state->event = NULL; | |
2074 | } | |
2075 | ||
2076 | return state; | |
2077 | } | |
2078 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
2079 | ||
2080 | /** | |
2081 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
2082 | * @crtc: drm CRTC | |
2083 | * @state: CRTC state object to release | |
2084 | * | |
2085 | * Default CRTC state destroy hook for drivers which don't have their own | |
2086 | * subclassed CRTC state structure. | |
2087 | */ | |
2088 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
2089 | struct drm_crtc_state *state) | |
2090 | { | |
2091 | kfree(state); | |
2092 | } | |
2093 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
2094 | ||
2095 | /** | |
2096 | * drm_atomic_helper_plane_reset - default ->reset hook for planes | |
2097 | * @plane: drm plane | |
2098 | * | |
2099 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
2100 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2101 | */ | |
2102 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
2103 | { | |
321ebf04 DV |
2104 | if (plane->state && plane->state->fb) |
2105 | drm_framebuffer_unreference(plane->state->fb); | |
2106 | ||
d461701c DV |
2107 | kfree(plane->state); |
2108 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
07cc0ef6 DV |
2109 | |
2110 | if (plane->state) | |
2111 | plane->state->plane = plane; | |
d461701c DV |
2112 | } |
2113 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
2114 | ||
2115 | /** | |
2116 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
2117 | * @plane: drm plane | |
2118 | * | |
2119 | * Default plane state duplicate hook for drivers which don't have their own | |
2120 | * subclassed plane state structure. | |
2121 | */ | |
2122 | struct drm_plane_state * | |
2123 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
2124 | { | |
321ebf04 DV |
2125 | struct drm_plane_state *state; |
2126 | ||
d461701c DV |
2127 | if (WARN_ON(!plane->state)) |
2128 | return NULL; | |
2129 | ||
321ebf04 DV |
2130 | state = kmemdup(plane->state, sizeof(*plane->state), GFP_KERNEL); |
2131 | ||
2132 | if (state && state->fb) | |
2133 | drm_framebuffer_reference(state->fb); | |
2134 | ||
2135 | return state; | |
d461701c DV |
2136 | } |
2137 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
2138 | ||
2139 | /** | |
2140 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
2141 | * @plane: drm plane | |
2142 | * @state: plane state object to release | |
2143 | * | |
2144 | * Default plane state destroy hook for drivers which don't have their own | |
2145 | * subclassed plane state structure. | |
2146 | */ | |
2147 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
321ebf04 | 2148 | struct drm_plane_state *state) |
d461701c | 2149 | { |
321ebf04 DV |
2150 | if (state->fb) |
2151 | drm_framebuffer_unreference(state->fb); | |
2152 | ||
d461701c DV |
2153 | kfree(state); |
2154 | } | |
2155 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
2156 | ||
2157 | /** | |
2158 | * drm_atomic_helper_connector_reset - default ->reset hook for connectors | |
2159 | * @connector: drm connector | |
2160 | * | |
2161 | * Resets the atomic state for @connector by freeing the state pointer (which | |
2162 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
2163 | * object. | |
2164 | */ | |
2165 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
2166 | { | |
2167 | kfree(connector->state); | |
2168 | connector->state = kzalloc(sizeof(*connector->state), GFP_KERNEL); | |
07cc0ef6 DV |
2169 | |
2170 | if (connector->state) | |
2171 | connector->state->connector = connector; | |
d461701c DV |
2172 | } |
2173 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
2174 | ||
2175 | /** | |
2176 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
2177 | * @connector: drm connector | |
2178 | * | |
2179 | * Default connector state duplicate hook for drivers which don't have their own | |
2180 | * subclassed connector state structure. | |
2181 | */ | |
2182 | struct drm_connector_state * | |
2183 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
2184 | { | |
2185 | if (WARN_ON(!connector->state)) | |
2186 | return NULL; | |
2187 | ||
2188 | return kmemdup(connector->state, sizeof(*connector->state), GFP_KERNEL); | |
2189 | } | |
2190 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
2191 | ||
2192 | /** | |
2193 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
2194 | * @connector: drm connector | |
2195 | * @state: connector state object to release | |
2196 | * | |
2197 | * Default connector state destroy hook for drivers which don't have their own | |
2198 | * subclassed connector state structure. | |
2199 | */ | |
2200 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
2201 | struct drm_connector_state *state) | |
2202 | { | |
2203 | kfree(state); | |
2204 | } | |
2205 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); |