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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) { | |
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 | ||
17a38d9c DV |
119 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d], stealing it\n", |
120 | encoder->base.id, encoder->name, | |
121 | encoder_crtc->base.id); | |
623369e5 DV |
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 | ||
17a38d9c DV |
133 | DRM_DEBUG_ATOMIC("Stealing encoder from [CONNECTOR:%d:%s]\n", |
134 | connector->base.id, | |
135 | connector->name); | |
623369e5 DV |
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 | { | |
b5ceff20 | 154 | const struct drm_connector_helper_funcs *funcs; |
623369e5 DV |
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 | ||
17a38d9c DV |
168 | DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n", |
169 | connector->base.id, | |
170 | connector->name); | |
623369e5 DV |
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) { | |
17a38d9c | 189 | DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n", |
623369e5 DV |
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) { | |
17a38d9c DV |
202 | DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", |
203 | connector->base.id, | |
204 | connector->name); | |
623369e5 DV |
205 | return -EINVAL; |
206 | } | |
207 | ||
208 | if (new_encoder == connector_state->best_encoder) { | |
17a38d9c DV |
209 | DRM_DEBUG_ATOMIC("[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); | |
623369e5 DV |
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) { | |
17a38d9c DV |
225 | DRM_DEBUG_ATOMIC("Encoder stealing failed for [CONNECTOR:%d:%s]\n", |
226 | connector->base.id, | |
227 | connector->name); | |
623369e5 DV |
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 | ||
17a38d9c DV |
238 | DRM_DEBUG_ATOMIC("[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); | |
623369e5 DV |
244 | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static int | |
249 | mode_fixup(struct drm_atomic_state *state) | |
250 | { | |
df63b999 | 251 | struct drm_crtc *crtc; |
623369e5 | 252 | struct drm_crtc_state *crtc_state; |
df63b999 | 253 | struct drm_connector *connector; |
623369e5 DV |
254 | struct drm_connector_state *conn_state; |
255 | int i; | |
256 | bool ret; | |
257 | ||
df63b999 ACO |
258 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
259 | if (!crtc_state->mode_changed) | |
623369e5 DV |
260 | continue; |
261 | ||
262 | drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); | |
263 | } | |
264 | ||
df63b999 | 265 | for_each_connector_in_state(state, connector, conn_state, i) { |
b5ceff20 | 266 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
267 | struct drm_encoder *encoder; |
268 | ||
623369e5 DV |
269 | WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); |
270 | ||
271 | if (!conn_state->crtc || !conn_state->best_encoder) | |
272 | continue; | |
273 | ||
274 | crtc_state = | |
275 | state->crtc_states[drm_crtc_index(conn_state->crtc)]; | |
276 | ||
277 | /* | |
278 | * Each encoder has at most one connector (since we always steal | |
279 | * it away), so we won't call ->mode_fixup twice. | |
280 | */ | |
281 | encoder = conn_state->best_encoder; | |
282 | funcs = encoder->helper_private; | |
840bfe95 ACO |
283 | if (!funcs) |
284 | continue; | |
623369e5 DV |
285 | |
286 | if (encoder->bridge && encoder->bridge->funcs->mode_fixup) { | |
287 | ret = encoder->bridge->funcs->mode_fixup( | |
288 | encoder->bridge, &crtc_state->mode, | |
289 | &crtc_state->adjusted_mode); | |
290 | if (!ret) { | |
17a38d9c | 291 | DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); |
623369e5 DV |
292 | return -EINVAL; |
293 | } | |
294 | } | |
295 | ||
4cd4df80 TR |
296 | if (funcs->atomic_check) { |
297 | ret = funcs->atomic_check(encoder, crtc_state, | |
298 | conn_state); | |
299 | if (ret) { | |
17a38d9c DV |
300 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", |
301 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
302 | return ret; |
303 | } | |
304 | } else { | |
305 | ret = funcs->mode_fixup(encoder, &crtc_state->mode, | |
306 | &crtc_state->adjusted_mode); | |
307 | if (!ret) { | |
17a38d9c DV |
308 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", |
309 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
310 | return -EINVAL; |
311 | } | |
623369e5 DV |
312 | } |
313 | } | |
314 | ||
df63b999 | 315 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 316 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 317 | |
df63b999 | 318 | if (!crtc_state->mode_changed) |
623369e5 DV |
319 | continue; |
320 | ||
321 | funcs = crtc->helper_private; | |
840bfe95 ACO |
322 | if (!funcs->mode_fixup) |
323 | continue; | |
324 | ||
623369e5 DV |
325 | ret = funcs->mode_fixup(crtc, &crtc_state->mode, |
326 | &crtc_state->adjusted_mode); | |
327 | if (!ret) { | |
17a38d9c DV |
328 | DRM_DEBUG_ATOMIC("[CRTC:%d] fixup failed\n", |
329 | crtc->base.id); | |
623369e5 DV |
330 | return -EINVAL; |
331 | } | |
332 | } | |
333 | ||
334 | return 0; | |
335 | } | |
336 | ||
eab3bbef DV |
337 | static bool |
338 | needs_modeset(struct drm_crtc_state *state) | |
339 | { | |
340 | return state->mode_changed || state->active_changed; | |
341 | } | |
342 | ||
d9b13620 | 343 | /** |
f98bd3ef | 344 | * drm_atomic_helper_check_modeset - validate state object for modeset changes |
d9b13620 DV |
345 | * @dev: DRM device |
346 | * @state: the driver state object | |
347 | * | |
348 | * Check the state object to see if the requested state is physically possible. | |
349 | * This does all the crtc and connector related computations for an atomic | |
350 | * update. It computes and updates crtc_state->mode_changed, adds any additional | |
351 | * connectors needed for full modesets and calls down into ->mode_fixup | |
352 | * functions of the driver backend. | |
353 | * | |
354 | * IMPORTANT: | |
355 | * | |
356 | * Drivers which update ->mode_changed (e.g. in their ->atomic_check hooks if a | |
357 | * plane update can't be done without a full modeset) _must_ call this function | |
358 | * afterwards after that change. It is permitted to call this function multiple | |
359 | * times for the same update, e.g. when the ->atomic_check functions depend upon | |
360 | * the adjusted dotclock for fifo space allocation and watermark computation. | |
361 | * | |
362 | * RETURNS | |
363 | * Zero for success or -errno | |
364 | */ | |
365 | int | |
934ce1c2 | 366 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
367 | struct drm_atomic_state *state) |
368 | { | |
623369e5 DV |
369 | struct drm_crtc *crtc; |
370 | struct drm_crtc_state *crtc_state; | |
df63b999 ACO |
371 | struct drm_connector *connector; |
372 | struct drm_connector_state *connector_state; | |
623369e5 DV |
373 | int i, ret; |
374 | ||
df63b999 | 375 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 | 376 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { |
17a38d9c DV |
377 | DRM_DEBUG_ATOMIC("[CRTC:%d] mode changed\n", |
378 | crtc->base.id); | |
623369e5 DV |
379 | crtc_state->mode_changed = true; |
380 | } | |
381 | ||
382 | if (crtc->state->enable != crtc_state->enable) { | |
17a38d9c DV |
383 | DRM_DEBUG_ATOMIC("[CRTC:%d] enable changed\n", |
384 | crtc->base.id); | |
623369e5 DV |
385 | crtc_state->mode_changed = true; |
386 | } | |
387 | } | |
388 | ||
df63b999 | 389 | for_each_connector_in_state(state, connector, connector_state, i) { |
623369e5 DV |
390 | /* |
391 | * This only sets crtc->mode_changed for routing changes, | |
392 | * drivers must set crtc->mode_changed themselves when connector | |
393 | * properties need to be updated. | |
394 | */ | |
395 | ret = update_connector_routing(state, i); | |
396 | if (ret) | |
397 | return ret; | |
398 | } | |
399 | ||
400 | /* | |
401 | * After all the routing has been prepared we need to add in any | |
402 | * connector which is itself unchanged, but who's crtc changes it's | |
403 | * configuration. This must be done before calling mode_fixup in case a | |
404 | * crtc only changed its mode but has the same set of connectors. | |
405 | */ | |
df63b999 | 406 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 DV |
407 | int num_connectors; |
408 | ||
eab3bbef DV |
409 | /* |
410 | * We must set ->active_changed after walking connectors for | |
411 | * otherwise an update that only changes active would result in | |
412 | * a full modeset because update_connector_routing force that. | |
413 | */ | |
414 | if (crtc->state->active != crtc_state->active) { | |
17a38d9c DV |
415 | DRM_DEBUG_ATOMIC("[CRTC:%d] active changed\n", |
416 | crtc->base.id); | |
eab3bbef DV |
417 | crtc_state->active_changed = true; |
418 | } | |
419 | ||
420 | if (!needs_modeset(crtc_state)) | |
623369e5 DV |
421 | continue; |
422 | ||
17a38d9c DV |
423 | DRM_DEBUG_ATOMIC("[CRTC:%d] needs all connectors, enable: %c, active: %c\n", |
424 | crtc->base.id, | |
425 | crtc_state->enable ? 'y' : 'n', | |
eab3bbef | 426 | crtc_state->active ? 'y' : 'n'); |
623369e5 DV |
427 | |
428 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
429 | if (ret != 0) | |
430 | return ret; | |
431 | ||
432 | num_connectors = drm_atomic_connectors_for_crtc(state, | |
433 | crtc); | |
434 | ||
435 | if (crtc_state->enable != !!num_connectors) { | |
17a38d9c DV |
436 | DRM_DEBUG_ATOMIC("[CRTC:%d] enabled/connectors mismatch\n", |
437 | crtc->base.id); | |
623369e5 DV |
438 | |
439 | return -EINVAL; | |
440 | } | |
441 | } | |
442 | ||
443 | return mode_fixup(state); | |
444 | } | |
d9b13620 | 445 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 446 | |
c2fcd274 | 447 | /** |
f98bd3ef | 448 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
449 | * @dev: DRM device |
450 | * @state: the driver state object | |
451 | * | |
452 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 DV |
453 | * This does all the plane update related checks using by calling into the |
454 | * ->atomic_check hooks provided by the driver. | |
c2fcd274 DV |
455 | * |
456 | * RETURNS | |
457 | * Zero for success or -errno | |
458 | */ | |
d9b13620 DV |
459 | int |
460 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
461 | struct drm_atomic_state *state) | |
c2fcd274 | 462 | { |
df63b999 ACO |
463 | struct drm_crtc *crtc; |
464 | struct drm_crtc_state *crtc_state; | |
465 | struct drm_plane *plane; | |
466 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
467 | int i, ret = 0; |
468 | ||
df63b999 | 469 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 470 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
471 | |
472 | funcs = plane->helper_private; | |
473 | ||
474 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
475 | ||
476 | if (!funcs || !funcs->atomic_check) | |
477 | continue; | |
478 | ||
479 | ret = funcs->atomic_check(plane, plane_state); | |
480 | if (ret) { | |
17a38d9c DV |
481 | DRM_DEBUG_ATOMIC("[PLANE:%d] atomic driver check failed\n", |
482 | plane->base.id); | |
c2fcd274 DV |
483 | return ret; |
484 | } | |
485 | } | |
486 | ||
df63b999 | 487 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 488 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
489 | |
490 | funcs = crtc->helper_private; | |
491 | ||
492 | if (!funcs || !funcs->atomic_check) | |
493 | continue; | |
494 | ||
495 | ret = funcs->atomic_check(crtc, state->crtc_states[i]); | |
496 | if (ret) { | |
17a38d9c DV |
497 | DRM_DEBUG_ATOMIC("[CRTC:%d] atomic driver check failed\n", |
498 | crtc->base.id); | |
c2fcd274 DV |
499 | return ret; |
500 | } | |
501 | } | |
502 | ||
d9b13620 DV |
503 | return ret; |
504 | } | |
505 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
506 | ||
507 | /** | |
508 | * drm_atomic_helper_check - validate state object | |
509 | * @dev: DRM device | |
510 | * @state: the driver state object | |
511 | * | |
512 | * Check the state object to see if the requested state is physically possible. | |
513 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
514 | * checking that a driver needs it can simply wrap that around this function. | |
515 | * Drivers without such needs can directly use this as their ->atomic_check() | |
516 | * callback. | |
517 | * | |
b4274fbe DV |
518 | * This just wraps the two parts of the state checking for planes and modeset |
519 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
520 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
521 | * ->atomic_check functions depend upon an updated adjusted_mode.clock to | |
522 | * e.g. properly compute watermarks. | |
523 | * | |
d9b13620 DV |
524 | * RETURNS |
525 | * Zero for success or -errno | |
526 | */ | |
527 | int drm_atomic_helper_check(struct drm_device *dev, | |
528 | struct drm_atomic_state *state) | |
529 | { | |
530 | int ret; | |
531 | ||
b4274fbe | 532 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
533 | if (ret) |
534 | return ret; | |
535 | ||
b4274fbe | 536 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
537 | if (ret) |
538 | return ret; | |
539 | ||
c2fcd274 DV |
540 | return ret; |
541 | } | |
542 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
543 | ||
623369e5 DV |
544 | static void |
545 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
546 | { | |
df63b999 ACO |
547 | struct drm_connector *connector; |
548 | struct drm_connector_state *old_conn_state; | |
549 | struct drm_crtc *crtc; | |
550 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
551 | int i; |
552 | ||
df63b999 | 553 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 554 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 555 | struct drm_encoder *encoder; |
eab3bbef | 556 | struct drm_crtc_state *old_crtc_state; |
623369e5 | 557 | |
623369e5 DV |
558 | /* Shut down everything that's in the changeset and currently |
559 | * still on. So need to check the old, saved state. */ | |
df63b999 | 560 | if (!old_conn_state->crtc) |
623369e5 DV |
561 | continue; |
562 | ||
eab3bbef DV |
563 | old_crtc_state = old_state->crtc_states[drm_crtc_index(old_conn_state->crtc)]; |
564 | ||
4218a32f DV |
565 | if (!old_crtc_state->active || |
566 | !needs_modeset(old_conn_state->crtc->state)) | |
eab3bbef DV |
567 | continue; |
568 | ||
46df9adb | 569 | encoder = old_conn_state->best_encoder; |
623369e5 | 570 | |
46df9adb RC |
571 | /* We shouldn't get this far if we didn't previously have |
572 | * an encoder.. but WARN_ON() rather than explode. | |
573 | */ | |
574 | if (WARN_ON(!encoder)) | |
623369e5 DV |
575 | continue; |
576 | ||
577 | funcs = encoder->helper_private; | |
578 | ||
17a38d9c DV |
579 | DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
580 | encoder->base.id, encoder->name); | |
95d6eb3b | 581 | |
623369e5 DV |
582 | /* |
583 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 584 | * it away), so we won't call disable hooks twice. |
623369e5 DV |
585 | */ |
586 | if (encoder->bridge) | |
587 | encoder->bridge->funcs->disable(encoder->bridge); | |
588 | ||
589 | /* Right function depends upon target state. */ | |
ee0a89cf | 590 | if (connector->state->crtc && funcs->prepare) |
623369e5 DV |
591 | funcs->prepare(encoder); |
592 | else if (funcs->disable) | |
593 | funcs->disable(encoder); | |
594 | else | |
595 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
596 | ||
597 | if (encoder->bridge) | |
598 | encoder->bridge->funcs->post_disable(encoder->bridge); | |
599 | } | |
600 | ||
df63b999 | 601 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 602 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
603 | |
604 | /* Shut down everything that needs a full modeset. */ | |
df63b999 | 605 | if (!needs_modeset(crtc->state)) |
eab3bbef DV |
606 | continue; |
607 | ||
608 | if (!old_crtc_state->active) | |
623369e5 DV |
609 | continue; |
610 | ||
611 | funcs = crtc->helper_private; | |
612 | ||
17a38d9c DV |
613 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d]\n", |
614 | crtc->base.id); | |
95d6eb3b DV |
615 | |
616 | ||
623369e5 | 617 | /* Right function depends upon target state. */ |
ee0a89cf | 618 | if (crtc->state->enable && funcs->prepare) |
623369e5 DV |
619 | funcs->prepare(crtc); |
620 | else if (funcs->disable) | |
621 | funcs->disable(crtc); | |
622 | else | |
623 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
624 | } | |
625 | } | |
626 | ||
4c18d301 DV |
627 | /** |
628 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state | |
629 | * @dev: DRM device | |
630 | * @old_state: atomic state object with old state structures | |
631 | * | |
632 | * This function updates all the various legacy modeset state pointers in | |
633 | * connectors, encoders and crtcs. It also updates the timestamping constants | |
634 | * used for precise vblank timestamps by calling | |
635 | * drm_calc_timestamping_constants(). | |
636 | * | |
637 | * Drivers can use this for building their own atomic commit if they don't have | |
638 | * a pure helper-based modeset implementation. | |
639 | */ | |
640 | void | |
641 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, | |
642 | struct drm_atomic_state *old_state) | |
623369e5 | 643 | { |
df63b999 ACO |
644 | struct drm_connector *connector; |
645 | struct drm_connector_state *old_conn_state; | |
646 | struct drm_crtc *crtc; | |
647 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
648 | int i; |
649 | ||
650 | /* clear out existing links */ | |
df63b999 ACO |
651 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
652 | if (!connector->encoder) | |
623369e5 DV |
653 | continue; |
654 | ||
655 | WARN_ON(!connector->encoder->crtc); | |
656 | ||
657 | connector->encoder->crtc = NULL; | |
658 | connector->encoder = NULL; | |
659 | } | |
660 | ||
661 | /* set new links */ | |
df63b999 ACO |
662 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
663 | if (!connector->state->crtc) | |
623369e5 DV |
664 | continue; |
665 | ||
666 | if (WARN_ON(!connector->state->best_encoder)) | |
667 | continue; | |
668 | ||
669 | connector->encoder = connector->state->best_encoder; | |
670 | connector->encoder->crtc = connector->state->crtc; | |
671 | } | |
672 | ||
673 | /* set legacy state in the crtc structure */ | |
df63b999 | 674 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
623369e5 DV |
675 | crtc->mode = crtc->state->mode; |
676 | crtc->enabled = crtc->state->enable; | |
677 | crtc->x = crtc->primary->state->src_x >> 16; | |
678 | crtc->y = crtc->primary->state->src_y >> 16; | |
3d51d2d2 DV |
679 | |
680 | if (crtc->state->enable) | |
681 | drm_calc_timestamping_constants(crtc, | |
682 | &crtc->state->adjusted_mode); | |
623369e5 DV |
683 | } |
684 | } | |
4c18d301 | 685 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); |
623369e5 DV |
686 | |
687 | static void | |
688 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
689 | { | |
df63b999 ACO |
690 | struct drm_crtc *crtc; |
691 | struct drm_crtc_state *old_crtc_state; | |
692 | struct drm_connector *connector; | |
693 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
694 | int i; |
695 | ||
df63b999 | 696 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 697 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 698 | |
df63b999 | 699 | if (!crtc->state->mode_changed) |
623369e5 DV |
700 | continue; |
701 | ||
702 | funcs = crtc->helper_private; | |
703 | ||
c982bd90 | 704 | if (crtc->state->enable && funcs->mode_set_nofb) { |
17a38d9c DV |
705 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d]\n", |
706 | crtc->base.id); | |
95d6eb3b | 707 | |
623369e5 | 708 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 709 | } |
623369e5 DV |
710 | } |
711 | ||
df63b999 | 712 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 713 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 714 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
715 | struct drm_encoder *encoder; |
716 | struct drm_display_mode *mode, *adjusted_mode; | |
717 | ||
df63b999 | 718 | if (!connector->state->best_encoder) |
623369e5 DV |
719 | continue; |
720 | ||
721 | encoder = connector->state->best_encoder; | |
722 | funcs = encoder->helper_private; | |
723 | new_crtc_state = connector->state->crtc->state; | |
724 | mode = &new_crtc_state->mode; | |
725 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
726 | ||
eab3bbef DV |
727 | if (!new_crtc_state->mode_changed) |
728 | continue; | |
729 | ||
17a38d9c DV |
730 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
731 | encoder->base.id, encoder->name); | |
95d6eb3b | 732 | |
623369e5 DV |
733 | /* |
734 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 735 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 736 | */ |
c982bd90 DV |
737 | if (funcs->mode_set) |
738 | funcs->mode_set(encoder, mode, adjusted_mode); | |
623369e5 DV |
739 | |
740 | if (encoder->bridge && encoder->bridge->funcs->mode_set) | |
741 | encoder->bridge->funcs->mode_set(encoder->bridge, | |
742 | mode, adjusted_mode); | |
743 | } | |
744 | } | |
745 | ||
746 | /** | |
1af434a9 | 747 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 748 | * @dev: DRM device |
a072f809 | 749 | * @old_state: atomic state object with old state structures |
623369e5 | 750 | * |
1af434a9 | 751 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 752 | * prepares them (if required) with the new mode. |
1af434a9 DV |
753 | * |
754 | * For compatability with legacy crtc helpers this should be called before | |
755 | * drm_atomic_helper_commit_planes(), which is what the default commit function | |
756 | * does. But drivers with different needs can group the modeset commits together | |
757 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
758 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 759 | */ |
1af434a9 DV |
760 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
761 | struct drm_atomic_state *old_state) | |
623369e5 | 762 | { |
a072f809 | 763 | disable_outputs(dev, old_state); |
4c18d301 DV |
764 | |
765 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); | |
766 | ||
a072f809 | 767 | crtc_set_mode(dev, old_state); |
623369e5 | 768 | } |
1af434a9 | 769 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 DV |
770 | |
771 | /** | |
1af434a9 | 772 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
773 | * @dev: DRM device |
774 | * @old_state: atomic state object with old state structures | |
775 | * | |
1af434a9 DV |
776 | * This function enables all the outputs with the new configuration which had to |
777 | * be turned off for the update. | |
778 | * | |
779 | * For compatability with legacy crtc helpers this should be called after | |
780 | * drm_atomic_helper_commit_planes(), which is what the default commit function | |
781 | * does. But drivers with different needs can group the modeset commits together | |
782 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
783 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 784 | */ |
1af434a9 DV |
785 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
786 | struct drm_atomic_state *old_state) | |
623369e5 | 787 | { |
df63b999 ACO |
788 | struct drm_crtc *crtc; |
789 | struct drm_crtc_state *old_crtc_state; | |
790 | struct drm_connector *connector; | |
791 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
792 | int i; |
793 | ||
df63b999 | 794 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 795 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
796 | |
797 | /* Need to filter out CRTCs where only planes change. */ | |
df63b999 | 798 | if (!needs_modeset(crtc->state)) |
eab3bbef DV |
799 | continue; |
800 | ||
801 | if (!crtc->state->active) | |
623369e5 DV |
802 | continue; |
803 | ||
804 | funcs = crtc->helper_private; | |
805 | ||
ee0a89cf | 806 | if (crtc->state->enable) { |
17a38d9c DV |
807 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d]\n", |
808 | crtc->base.id); | |
95d6eb3b | 809 | |
ee0a89cf DV |
810 | if (funcs->enable) |
811 | funcs->enable(crtc); | |
812 | else | |
813 | funcs->commit(crtc); | |
814 | } | |
623369e5 DV |
815 | } |
816 | ||
df63b999 | 817 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 818 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
819 | struct drm_encoder *encoder; |
820 | ||
df63b999 | 821 | if (!connector->state->best_encoder) |
623369e5 DV |
822 | continue; |
823 | ||
4218a32f DV |
824 | if (!connector->state->crtc->state->active || |
825 | !needs_modeset(connector->state->crtc->state)) | |
eab3bbef DV |
826 | continue; |
827 | ||
623369e5 DV |
828 | encoder = connector->state->best_encoder; |
829 | funcs = encoder->helper_private; | |
830 | ||
17a38d9c DV |
831 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
832 | encoder->base.id, encoder->name); | |
95d6eb3b | 833 | |
623369e5 DV |
834 | /* |
835 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 836 | * it away), so we won't call enable hooks twice. |
623369e5 DV |
837 | */ |
838 | if (encoder->bridge) | |
839 | encoder->bridge->funcs->pre_enable(encoder->bridge); | |
840 | ||
ee0a89cf DV |
841 | if (funcs->enable) |
842 | funcs->enable(encoder); | |
843 | else | |
844 | funcs->commit(encoder); | |
623369e5 DV |
845 | |
846 | if (encoder->bridge) | |
847 | encoder->bridge->funcs->enable(encoder->bridge); | |
848 | } | |
849 | } | |
1af434a9 | 850 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 851 | |
e2330f07 DV |
852 | static void wait_for_fences(struct drm_device *dev, |
853 | struct drm_atomic_state *state) | |
854 | { | |
df63b999 ACO |
855 | struct drm_plane *plane; |
856 | struct drm_plane_state *plane_state; | |
e2330f07 DV |
857 | int i; |
858 | ||
df63b999 ACO |
859 | for_each_plane_in_state(state, plane, plane_state, i) { |
860 | if (!plane->state->fence) | |
e2330f07 DV |
861 | continue; |
862 | ||
863 | WARN_ON(!plane->state->fb); | |
864 | ||
865 | fence_wait(plane->state->fence, false); | |
866 | fence_put(plane->state->fence); | |
867 | plane->state->fence = NULL; | |
868 | } | |
869 | } | |
870 | ||
ab58e338 DV |
871 | static bool framebuffer_changed(struct drm_device *dev, |
872 | struct drm_atomic_state *old_state, | |
873 | struct drm_crtc *crtc) | |
874 | { | |
875 | struct drm_plane *plane; | |
876 | struct drm_plane_state *old_plane_state; | |
ab58e338 DV |
877 | int i; |
878 | ||
df63b999 | 879 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
ab58e338 DV |
880 | if (plane->state->crtc != crtc && |
881 | old_plane_state->crtc != crtc) | |
882 | continue; | |
883 | ||
884 | if (plane->state->fb != old_plane_state->fb) | |
885 | return true; | |
886 | } | |
887 | ||
888 | return false; | |
889 | } | |
890 | ||
5ee3229c RC |
891 | /** |
892 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
893 | * @dev: DRM device | |
894 | * @old_state: atomic state object with old state structures | |
895 | * | |
896 | * Helper to, after atomic commit, wait for vblanks on all effected | |
897 | * crtcs (ie. before cleaning up old framebuffers using | |
ab58e338 DV |
898 | * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
899 | * framebuffers have actually changed to optimize for the legacy cursor and | |
900 | * plane update use-case. | |
5ee3229c RC |
901 | */ |
902 | void | |
903 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
904 | struct drm_atomic_state *old_state) | |
623369e5 DV |
905 | { |
906 | struct drm_crtc *crtc; | |
907 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
908 | int i, ret; |
909 | ||
df63b999 | 910 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
623369e5 DV |
911 | /* No one cares about the old state, so abuse it for tracking |
912 | * and store whether we hold a vblank reference (and should do a | |
913 | * vblank wait) in the ->enable boolean. */ | |
914 | old_crtc_state->enable = false; | |
915 | ||
916 | if (!crtc->state->enable) | |
917 | continue; | |
918 | ||
f02ad907 DV |
919 | /* Legacy cursor ioctls are completely unsynced, and userspace |
920 | * relies on that (by doing tons of cursor updates). */ | |
921 | if (old_state->legacy_cursor_update) | |
922 | continue; | |
923 | ||
ab58e338 DV |
924 | if (!framebuffer_changed(dev, old_state, crtc)) |
925 | continue; | |
926 | ||
623369e5 DV |
927 | ret = drm_crtc_vblank_get(crtc); |
928 | if (ret != 0) | |
929 | continue; | |
930 | ||
931 | old_crtc_state->enable = true; | |
932 | old_crtc_state->last_vblank_count = drm_vblank_count(dev, i); | |
933 | } | |
934 | ||
df63b999 ACO |
935 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
936 | if (!old_crtc_state->enable) | |
623369e5 DV |
937 | continue; |
938 | ||
939 | ret = wait_event_timeout(dev->vblank[i].queue, | |
940 | old_crtc_state->last_vblank_count != | |
941 | drm_vblank_count(dev, i), | |
942 | msecs_to_jiffies(50)); | |
943 | ||
944 | drm_crtc_vblank_put(crtc); | |
945 | } | |
946 | } | |
5ee3229c | 947 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 DV |
948 | |
949 | /** | |
950 | * drm_atomic_helper_commit - commit validated state object | |
951 | * @dev: DRM device | |
952 | * @state: the driver state object | |
953 | * @async: asynchronous commit | |
954 | * | |
955 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
956 | * object. This can still fail when e.g. the framebuffer reservation fails. For | |
957 | * now this doesn't implement asynchronous commits. | |
958 | * | |
959 | * RETURNS | |
960 | * Zero for success or -errno. | |
961 | */ | |
962 | int drm_atomic_helper_commit(struct drm_device *dev, | |
963 | struct drm_atomic_state *state, | |
964 | bool async) | |
965 | { | |
966 | int ret; | |
967 | ||
968 | if (async) | |
969 | return -EBUSY; | |
970 | ||
971 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
972 | if (ret) | |
973 | return ret; | |
974 | ||
975 | /* | |
976 | * This is the point of no return - everything below never fails except | |
977 | * when the hw goes bonghits. Which means we can commit the new state on | |
978 | * the software side now. | |
979 | */ | |
980 | ||
981 | drm_atomic_helper_swap_state(dev, state); | |
982 | ||
983 | /* | |
984 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 985 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
986 | * that the asynchronous work has either been cancelled (if the driver |
987 | * supports it, which at least requires that the framebuffers get | |
988 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
989 | * before the new state gets committed on the software side with | |
990 | * drm_atomic_helper_swap_state(). | |
991 | * | |
992 | * This scheme allows new atomic state updates to be prepared and | |
993 | * checked in parallel to the asynchronous completion of the previous | |
994 | * update. Which is important since compositors need to figure out the | |
995 | * composition of the next frame right after having submitted the | |
996 | * current layout. | |
997 | */ | |
998 | ||
e2330f07 DV |
999 | wait_for_fences(dev, state); |
1000 | ||
1af434a9 | 1001 | drm_atomic_helper_commit_modeset_disables(dev, state); |
623369e5 DV |
1002 | |
1003 | drm_atomic_helper_commit_planes(dev, state); | |
1004 | ||
1af434a9 | 1005 | drm_atomic_helper_commit_modeset_enables(dev, state); |
623369e5 | 1006 | |
5ee3229c | 1007 | drm_atomic_helper_wait_for_vblanks(dev, state); |
623369e5 DV |
1008 | |
1009 | drm_atomic_helper_cleanup_planes(dev, state); | |
1010 | ||
1011 | drm_atomic_state_free(state); | |
1012 | ||
1013 | return 0; | |
1014 | } | |
1015 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1016 | ||
e8c833a7 DV |
1017 | /** |
1018 | * DOC: implementing async commit | |
1019 | * | |
1020 | * For now the atomic helpers don't support async commit directly. If there is | |
1021 | * real need it could be added though, using the dma-buf fence infrastructure | |
1022 | * for generic synchronization with outstanding rendering. | |
1023 | * | |
1024 | * For now drivers have to implement async commit themselves, with the following | |
1025 | * sequence being the recommended one: | |
1026 | * | |
1027 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
1028 | * which commit needs to call which can fail, so we want to run it first and | |
1029 | * synchronously. | |
1030 | * | |
1031 | * 2. Synchronize with any outstanding asynchronous commit worker threads which | |
1032 | * might be affected the new state update. This can be done by either cancelling | |
1033 | * or flushing the work items, depending upon whether the driver can deal with | |
1034 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
1035 | * cleanup is still done when cancelling. | |
1036 | * | |
1037 | * For sufficient parallelism it is recommended to have a work item per crtc | |
1038 | * (for updates which don't touch global state) and a global one. Then we only | |
1039 | * need to synchronize with the crtc work items for changed crtcs and the global | |
1040 | * work item, which allows nice concurrent updates on disjoint sets of crtcs. | |
1041 | * | |
1042 | * 3. The software state is updated synchronously with | |
1043 | * drm_atomic_helper_swap_state. Doing this under the protection of all modeset | |
1044 | * locks means concurrent callers never see inconsistent state. And doing this | |
1045 | * while it's guaranteed that no relevant async worker runs means that async | |
1046 | * workers do not need grab any locks. Actually they must not grab locks, for | |
1047 | * otherwise the work flushing will deadlock. | |
1048 | * | |
1049 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1050 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1051 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
1052 | * being displayed. | |
1053 | */ | |
1054 | ||
c2fcd274 | 1055 | /** |
2e3afd47 | 1056 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 1057 | * @dev: DRM device |
2e3afd47 | 1058 | * @state: atomic state object with new state structures |
c2fcd274 DV |
1059 | * |
1060 | * This function prepares plane state, specifically framebuffers, for the new | |
1061 | * configuration. If any failure is encountered this function will call | |
1062 | * ->cleanup_fb on any already successfully prepared framebuffer. | |
1063 | * | |
1064 | * Returns: | |
1065 | * 0 on success, negative error code on failure. | |
1066 | */ | |
1067 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
1068 | struct drm_atomic_state *state) | |
1069 | { | |
1070 | int nplanes = dev->mode_config.num_total_plane; | |
1071 | int ret, i; | |
1072 | ||
1073 | for (i = 0; i < nplanes; i++) { | |
b5ceff20 | 1074 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1075 | struct drm_plane *plane = state->planes[i]; |
d136dfee | 1076 | struct drm_plane_state *plane_state = state->plane_states[i]; |
c2fcd274 DV |
1077 | struct drm_framebuffer *fb; |
1078 | ||
1079 | if (!plane) | |
1080 | continue; | |
1081 | ||
1082 | funcs = plane->helper_private; | |
1083 | ||
d136dfee | 1084 | fb = plane_state->fb; |
c2fcd274 DV |
1085 | |
1086 | if (fb && funcs->prepare_fb) { | |
d136dfee | 1087 | ret = funcs->prepare_fb(plane, fb, plane_state); |
c2fcd274 DV |
1088 | if (ret) |
1089 | goto fail; | |
1090 | } | |
1091 | } | |
1092 | ||
1093 | return 0; | |
1094 | ||
1095 | fail: | |
1096 | for (i--; i >= 0; i--) { | |
b5ceff20 | 1097 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1098 | struct drm_plane *plane = state->planes[i]; |
d136dfee | 1099 | struct drm_plane_state *plane_state = state->plane_states[i]; |
c2fcd274 DV |
1100 | struct drm_framebuffer *fb; |
1101 | ||
1102 | if (!plane) | |
1103 | continue; | |
1104 | ||
1105 | funcs = plane->helper_private; | |
1106 | ||
1107 | fb = state->plane_states[i]->fb; | |
1108 | ||
1109 | if (fb && funcs->cleanup_fb) | |
d136dfee | 1110 | funcs->cleanup_fb(plane, fb, plane_state); |
c2fcd274 DV |
1111 | |
1112 | } | |
1113 | ||
1114 | return ret; | |
1115 | } | |
1116 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
1117 | ||
1118 | /** | |
1119 | * drm_atomic_helper_commit_planes - commit plane state | |
1120 | * @dev: DRM device | |
b0fcfc89 | 1121 | * @old_state: atomic state object with old state structures |
c2fcd274 DV |
1122 | * |
1123 | * This function commits the new plane state using the plane and atomic helper | |
1124 | * functions for planes and crtcs. It assumes that the atomic state has already | |
1125 | * been pushed into the relevant object state pointers, since this step can no | |
1126 | * longer fail. | |
1127 | * | |
b0fcfc89 | 1128 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 DV |
1129 | * crtcs need to be updated though. |
1130 | */ | |
1131 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
b0fcfc89 | 1132 | struct drm_atomic_state *old_state) |
c2fcd274 | 1133 | { |
df63b999 ACO |
1134 | struct drm_crtc *crtc; |
1135 | struct drm_crtc_state *old_crtc_state; | |
1136 | struct drm_plane *plane; | |
1137 | struct drm_plane_state *old_plane_state; | |
c2fcd274 DV |
1138 | int i; |
1139 | ||
df63b999 | 1140 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1141 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1142 | |
1143 | funcs = crtc->helper_private; | |
1144 | ||
1145 | if (!funcs || !funcs->atomic_begin) | |
1146 | continue; | |
1147 | ||
1148 | funcs->atomic_begin(crtc); | |
1149 | } | |
1150 | ||
df63b999 | 1151 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
b5ceff20 | 1152 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
1153 | |
1154 | funcs = plane->helper_private; | |
1155 | ||
3cad4b68 | 1156 | if (!funcs) |
c2fcd274 DV |
1157 | continue; |
1158 | ||
407b8bd9 TR |
1159 | /* |
1160 | * Special-case disabling the plane if drivers support it. | |
1161 | */ | |
1162 | if (drm_atomic_plane_disabling(plane, old_plane_state) && | |
1163 | funcs->atomic_disable) | |
1164 | funcs->atomic_disable(plane, old_plane_state); | |
475d231b DV |
1165 | else if (plane->state->crtc || |
1166 | drm_atomic_plane_disabling(plane, old_plane_state)) | |
407b8bd9 | 1167 | funcs->atomic_update(plane, old_plane_state); |
c2fcd274 DV |
1168 | } |
1169 | ||
df63b999 | 1170 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1171 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1172 | |
1173 | funcs = crtc->helper_private; | |
1174 | ||
1175 | if (!funcs || !funcs->atomic_flush) | |
1176 | continue; | |
1177 | ||
1178 | funcs->atomic_flush(crtc); | |
1179 | } | |
1180 | } | |
1181 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1182 | ||
1183 | /** | |
1184 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1185 | * @dev: DRM device | |
1186 | * @old_state: atomic state object with old state structures | |
1187 | * | |
1188 | * This function cleans up plane state, specifically framebuffers, from the old | |
1189 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1190 | * be able to call this function. | |
1191 | * | |
1192 | * This function must also be called on the new state when the atomic update | |
1193 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1194 | */ | |
1195 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1196 | struct drm_atomic_state *old_state) | |
1197 | { | |
df63b999 ACO |
1198 | struct drm_plane *plane; |
1199 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
1200 | int i; |
1201 | ||
df63b999 | 1202 | for_each_plane_in_state(old_state, plane, plane_state, i) { |
b5ceff20 | 1203 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
1204 | struct drm_framebuffer *old_fb; |
1205 | ||
c2fcd274 DV |
1206 | funcs = plane->helper_private; |
1207 | ||
d136dfee | 1208 | old_fb = plane_state->fb; |
c2fcd274 DV |
1209 | |
1210 | if (old_fb && funcs->cleanup_fb) | |
d136dfee | 1211 | funcs->cleanup_fb(plane, old_fb, plane_state); |
c2fcd274 DV |
1212 | } |
1213 | } | |
1214 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1215 | ||
1216 | /** | |
1217 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
1218 | * @dev: DRM device | |
1219 | * @state: atomic state | |
1220 | * | |
1221 | * This function stores the atomic state into the current state pointers in all | |
1222 | * driver objects. It should be called after all failing steps have been done | |
1223 | * and succeeded, but before the actual hardware state is committed. | |
1224 | * | |
1225 | * For cleanup and error recovery the current state for all changed objects will | |
1226 | * be swaped into @state. | |
1227 | * | |
1228 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1229 | * | |
1230 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1231 | * | |
1232 | * 2. Do any other steps that might fail. | |
1233 | * | |
1234 | * 3. Put the staged state into the current state pointers with this function. | |
1235 | * | |
1236 | * 4. Actually commit the hardware state. | |
1237 | * | |
1238 | * 5. Call drm_atomic_helper_cleanup_planes with @state, which since step 3 | |
1239 | * contains the old state. Also do any other cleanup required with that state. | |
1240 | */ | |
1241 | void drm_atomic_helper_swap_state(struct drm_device *dev, | |
1242 | struct drm_atomic_state *state) | |
1243 | { | |
1244 | int i; | |
1245 | ||
1246 | for (i = 0; i < dev->mode_config.num_connector; i++) { | |
1247 | struct drm_connector *connector = state->connectors[i]; | |
1248 | ||
1249 | if (!connector) | |
1250 | continue; | |
1251 | ||
1252 | connector->state->state = state; | |
1253 | swap(state->connector_states[i], connector->state); | |
1254 | connector->state->state = NULL; | |
1255 | } | |
1256 | ||
1257 | for (i = 0; i < dev->mode_config.num_crtc; i++) { | |
1258 | struct drm_crtc *crtc = state->crtcs[i]; | |
1259 | ||
1260 | if (!crtc) | |
1261 | continue; | |
1262 | ||
1263 | crtc->state->state = state; | |
1264 | swap(state->crtc_states[i], crtc->state); | |
1265 | crtc->state->state = NULL; | |
1266 | } | |
1267 | ||
1268 | for (i = 0; i < dev->mode_config.num_total_plane; i++) { | |
1269 | struct drm_plane *plane = state->planes[i]; | |
1270 | ||
1271 | if (!plane) | |
1272 | continue; | |
1273 | ||
1274 | plane->state->state = state; | |
1275 | swap(state->plane_states[i], plane->state); | |
1276 | plane->state->state = NULL; | |
1277 | } | |
1278 | } | |
1279 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
1280 | |
1281 | /** | |
1282 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
1283 | * @plane: plane object to update | |
1284 | * @crtc: owning CRTC of owning plane | |
1285 | * @fb: framebuffer to flip onto plane | |
1286 | * @crtc_x: x offset of primary plane on crtc | |
1287 | * @crtc_y: y offset of primary plane on crtc | |
1288 | * @crtc_w: width of primary plane rectangle on crtc | |
1289 | * @crtc_h: height of primary plane rectangle on crtc | |
1290 | * @src_x: x offset of @fb for panning | |
1291 | * @src_y: y offset of @fb for panning | |
1292 | * @src_w: width of source rectangle in @fb | |
1293 | * @src_h: height of source rectangle in @fb | |
1294 | * | |
1295 | * Provides a default plane update handler using the atomic driver interface. | |
1296 | * | |
1297 | * RETURNS: | |
1298 | * Zero on success, error code on failure | |
1299 | */ | |
1300 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
1301 | struct drm_crtc *crtc, | |
1302 | struct drm_framebuffer *fb, | |
1303 | int crtc_x, int crtc_y, | |
1304 | unsigned int crtc_w, unsigned int crtc_h, | |
1305 | uint32_t src_x, uint32_t src_y, | |
1306 | uint32_t src_w, uint32_t src_h) | |
1307 | { | |
1308 | struct drm_atomic_state *state; | |
1309 | struct drm_plane_state *plane_state; | |
1310 | int ret = 0; | |
1311 | ||
1312 | state = drm_atomic_state_alloc(plane->dev); | |
1313 | if (!state) | |
1314 | return -ENOMEM; | |
1315 | ||
1316 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1317 | retry: | |
1318 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1319 | if (IS_ERR(plane_state)) { | |
1320 | ret = PTR_ERR(plane_state); | |
1321 | goto fail; | |
1322 | } | |
1323 | ||
07cc0ef6 | 1324 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
1325 | if (ret != 0) |
1326 | goto fail; | |
321ebf04 | 1327 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
1328 | plane_state->crtc_x = crtc_x; |
1329 | plane_state->crtc_y = crtc_y; | |
1330 | plane_state->crtc_h = crtc_h; | |
1331 | plane_state->crtc_w = crtc_w; | |
1332 | plane_state->src_x = src_x; | |
1333 | plane_state->src_y = src_y; | |
1334 | plane_state->src_h = src_h; | |
1335 | plane_state->src_w = src_w; | |
1336 | ||
3671c580 DV |
1337 | if (plane == crtc->cursor) |
1338 | state->legacy_cursor_update = true; | |
1339 | ||
042652ed DV |
1340 | ret = drm_atomic_commit(state); |
1341 | if (ret != 0) | |
1342 | goto fail; | |
1343 | ||
1344 | /* Driver takes ownership of state on successful commit. */ | |
1345 | return 0; | |
1346 | fail: | |
1347 | if (ret == -EDEADLK) | |
1348 | goto backoff; | |
1349 | ||
1350 | drm_atomic_state_free(state); | |
1351 | ||
1352 | return ret; | |
1353 | backoff: | |
042652ed | 1354 | drm_atomic_state_clear(state); |
6f75cea6 | 1355 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1356 | |
1357 | /* | |
1358 | * Someone might have exchanged the framebuffer while we dropped locks | |
1359 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1360 | * core does for us. | |
1361 | */ | |
1362 | plane->old_fb = plane->fb; | |
1363 | ||
1364 | goto retry; | |
1365 | } | |
1366 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
1367 | ||
1368 | /** | |
1369 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
1370 | * @plane: plane to disable | |
1371 | * | |
1372 | * Provides a default plane disable handler using the atomic driver interface. | |
1373 | * | |
1374 | * RETURNS: | |
1375 | * Zero on success, error code on failure | |
1376 | */ | |
1377 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
1378 | { | |
1379 | struct drm_atomic_state *state; | |
1380 | struct drm_plane_state *plane_state; | |
1381 | int ret = 0; | |
1382 | ||
aa54e2ee JSP |
1383 | /* |
1384 | * FIXME: Without plane->crtc set we can't get at the implicit legacy | |
1385 | * acquire context. The real fix will be to wire the acquire ctx through | |
1386 | * everywhere we need it, but meanwhile prevent chaos by just skipping | |
1387 | * this noop. The critical case is the cursor ioctls which a) only grab | |
1388 | * crtc/cursor-plane locks (so we need the crtc to get at the right | |
1389 | * acquire context) and b) can try to disable the plane multiple times. | |
1390 | */ | |
1391 | if (!plane->crtc) | |
1392 | return 0; | |
1393 | ||
042652ed DV |
1394 | state = drm_atomic_state_alloc(plane->dev); |
1395 | if (!state) | |
1396 | return -ENOMEM; | |
1397 | ||
1398 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
1399 | retry: | |
1400 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1401 | if (IS_ERR(plane_state)) { | |
1402 | ret = PTR_ERR(plane_state); | |
1403 | goto fail; | |
1404 | } | |
1405 | ||
07cc0ef6 | 1406 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); |
042652ed DV |
1407 | if (ret != 0) |
1408 | goto fail; | |
321ebf04 | 1409 | drm_atomic_set_fb_for_plane(plane_state, NULL); |
042652ed DV |
1410 | plane_state->crtc_x = 0; |
1411 | plane_state->crtc_y = 0; | |
1412 | plane_state->crtc_h = 0; | |
1413 | plane_state->crtc_w = 0; | |
1414 | plane_state->src_x = 0; | |
1415 | plane_state->src_y = 0; | |
1416 | plane_state->src_h = 0; | |
1417 | plane_state->src_w = 0; | |
1418 | ||
f02ad907 DV |
1419 | if (plane == plane->crtc->cursor) |
1420 | state->legacy_cursor_update = true; | |
1421 | ||
042652ed DV |
1422 | ret = drm_atomic_commit(state); |
1423 | if (ret != 0) | |
1424 | goto fail; | |
1425 | ||
1426 | /* Driver takes ownership of state on successful commit. */ | |
1427 | return 0; | |
1428 | fail: | |
1429 | if (ret == -EDEADLK) | |
1430 | goto backoff; | |
1431 | ||
1432 | drm_atomic_state_free(state); | |
1433 | ||
1434 | return ret; | |
1435 | backoff: | |
042652ed | 1436 | drm_atomic_state_clear(state); |
6f75cea6 | 1437 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1438 | |
1439 | /* | |
1440 | * Someone might have exchanged the framebuffer while we dropped locks | |
1441 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1442 | * core does for us. | |
1443 | */ | |
1444 | plane->old_fb = plane->fb; | |
1445 | ||
1446 | goto retry; | |
1447 | } | |
1448 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
1449 | ||
1450 | static int update_output_state(struct drm_atomic_state *state, | |
1451 | struct drm_mode_set *set) | |
1452 | { | |
1453 | struct drm_device *dev = set->crtc->dev; | |
df63b999 ACO |
1454 | struct drm_crtc *crtc; |
1455 | struct drm_crtc_state *crtc_state; | |
1456 | struct drm_connector *connector; | |
042652ed | 1457 | struct drm_connector_state *conn_state; |
042652ed DV |
1458 | int ret, i, j; |
1459 | ||
1460 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
1461 | state->acquire_ctx); | |
1462 | if (ret) | |
1463 | return ret; | |
1464 | ||
1465 | /* First grab all affected connector/crtc states. */ | |
1466 | for (i = 0; i < set->num_connectors; i++) { | |
1467 | conn_state = drm_atomic_get_connector_state(state, | |
1468 | set->connectors[i]); | |
1469 | if (IS_ERR(conn_state)) | |
1470 | return PTR_ERR(conn_state); | |
1471 | } | |
1472 | ||
df63b999 | 1473 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
1474 | ret = drm_atomic_add_affected_connectors(state, crtc); |
1475 | if (ret) | |
1476 | return ret; | |
1477 | } | |
1478 | ||
1479 | /* Then recompute connector->crtc links and crtc enabling state. */ | |
df63b999 | 1480 | for_each_connector_in_state(state, connector, conn_state, i) { |
042652ed DV |
1481 | if (conn_state->crtc == set->crtc) { |
1482 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1483 | NULL); | |
1484 | if (ret) | |
1485 | return ret; | |
1486 | } | |
1487 | ||
1488 | for (j = 0; j < set->num_connectors; j++) { | |
1489 | if (set->connectors[j] == connector) { | |
1490 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1491 | set->crtc); | |
1492 | if (ret) | |
1493 | return ret; | |
1494 | break; | |
1495 | } | |
1496 | } | |
1497 | } | |
1498 | ||
df63b999 | 1499 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
1500 | /* Don't update ->enable for the CRTC in the set_config request, |
1501 | * since a mismatch would indicate a bug in the upper layers. | |
1502 | * The actual modeset code later on will catch any | |
1503 | * inconsistencies here. */ | |
1504 | if (crtc == set->crtc) | |
1505 | continue; | |
1506 | ||
1507 | crtc_state->enable = | |
1508 | drm_atomic_connectors_for_crtc(state, crtc); | |
1509 | } | |
1510 | ||
1511 | return 0; | |
1512 | } | |
1513 | ||
1514 | /** | |
1515 | * drm_atomic_helper_set_config - set a new config from userspace | |
1516 | * @set: mode set configuration | |
1517 | * | |
1518 | * Provides a default crtc set_config handler using the atomic driver interface. | |
1519 | * | |
1520 | * Returns: | |
1521 | * Returns 0 on success, negative errno numbers on failure. | |
1522 | */ | |
1523 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
1524 | { | |
1525 | struct drm_atomic_state *state; | |
1526 | struct drm_crtc *crtc = set->crtc; | |
1527 | struct drm_crtc_state *crtc_state; | |
1528 | struct drm_plane_state *primary_state; | |
1529 | int ret = 0; | |
1530 | ||
1531 | state = drm_atomic_state_alloc(crtc->dev); | |
1532 | if (!state) | |
1533 | return -ENOMEM; | |
1534 | ||
1535 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1536 | retry: | |
1537 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1538 | if (IS_ERR(crtc_state)) { | |
1539 | ret = PTR_ERR(crtc_state); | |
1540 | goto fail; | |
1541 | } | |
1542 | ||
e5b5341c RC |
1543 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); |
1544 | if (IS_ERR(primary_state)) { | |
1545 | ret = PTR_ERR(primary_state); | |
1546 | goto fail; | |
1547 | } | |
1548 | ||
042652ed DV |
1549 | if (!set->mode) { |
1550 | WARN_ON(set->fb); | |
1551 | WARN_ON(set->num_connectors); | |
1552 | ||
1553 | crtc_state->enable = false; | |
eab3bbef | 1554 | crtc_state->active = false; |
e5b5341c | 1555 | |
07cc0ef6 | 1556 | ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
e5b5341c RC |
1557 | if (ret != 0) |
1558 | goto fail; | |
1559 | ||
1560 | drm_atomic_set_fb_for_plane(primary_state, NULL); | |
1561 | ||
042652ed DV |
1562 | goto commit; |
1563 | } | |
1564 | ||
1565 | WARN_ON(!set->fb); | |
1566 | WARN_ON(!set->num_connectors); | |
1567 | ||
1568 | crtc_state->enable = true; | |
eab3bbef | 1569 | crtc_state->active = true; |
042652ed DV |
1570 | drm_mode_copy(&crtc_state->mode, set->mode); |
1571 | ||
07cc0ef6 | 1572 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
042652ed DV |
1573 | if (ret != 0) |
1574 | goto fail; | |
321ebf04 | 1575 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
042652ed DV |
1576 | primary_state->crtc_x = 0; |
1577 | primary_state->crtc_y = 0; | |
1578 | primary_state->crtc_h = set->mode->vdisplay; | |
1579 | primary_state->crtc_w = set->mode->hdisplay; | |
1580 | primary_state->src_x = set->x << 16; | |
1581 | primary_state->src_y = set->y << 16; | |
1582 | primary_state->src_h = set->mode->vdisplay << 16; | |
1583 | primary_state->src_w = set->mode->hdisplay << 16; | |
1584 | ||
1585 | commit: | |
1586 | ret = update_output_state(state, set); | |
1587 | if (ret) | |
1588 | goto fail; | |
1589 | ||
1590 | ret = drm_atomic_commit(state); | |
1591 | if (ret != 0) | |
1592 | goto fail; | |
1593 | ||
1594 | /* Driver takes ownership of state on successful commit. */ | |
1595 | return 0; | |
1596 | fail: | |
1597 | if (ret == -EDEADLK) | |
1598 | goto backoff; | |
1599 | ||
1600 | drm_atomic_state_free(state); | |
1601 | ||
1602 | return ret; | |
1603 | backoff: | |
042652ed | 1604 | drm_atomic_state_clear(state); |
6f75cea6 | 1605 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1606 | |
1607 | /* | |
1608 | * Someone might have exchanged the framebuffer while we dropped locks | |
1609 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1610 | * core does for us. | |
1611 | */ | |
1612 | crtc->primary->old_fb = crtc->primary->fb; | |
1613 | ||
1614 | goto retry; | |
1615 | } | |
1616 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
1617 | ||
1618 | /** | |
7f50002f | 1619 | * drm_atomic_helper_crtc_set_property - helper for crtc properties |
042652ed DV |
1620 | * @crtc: DRM crtc |
1621 | * @property: DRM property | |
1622 | * @val: value of property | |
1623 | * | |
7f50002f LP |
1624 | * Provides a default crtc set_property handler using the atomic driver |
1625 | * interface. | |
042652ed DV |
1626 | * |
1627 | * RETURNS: | |
1628 | * Zero on success, error code on failure | |
1629 | */ | |
1630 | int | |
1631 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
1632 | struct drm_property *property, | |
1633 | uint64_t val) | |
1634 | { | |
1635 | struct drm_atomic_state *state; | |
1636 | struct drm_crtc_state *crtc_state; | |
1637 | int ret = 0; | |
1638 | ||
1639 | state = drm_atomic_state_alloc(crtc->dev); | |
1640 | if (!state) | |
1641 | return -ENOMEM; | |
1642 | ||
1643 | /* ->set_property is always called with all locks held. */ | |
1644 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
1645 | retry: | |
1646 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1647 | if (IS_ERR(crtc_state)) { | |
1648 | ret = PTR_ERR(crtc_state); | |
1649 | goto fail; | |
1650 | } | |
1651 | ||
40ecc694 RC |
1652 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
1653 | property, val); | |
042652ed DV |
1654 | if (ret) |
1655 | goto fail; | |
1656 | ||
1657 | ret = drm_atomic_commit(state); | |
1658 | if (ret != 0) | |
1659 | goto fail; | |
1660 | ||
1661 | /* Driver takes ownership of state on successful commit. */ | |
1662 | return 0; | |
1663 | fail: | |
1664 | if (ret == -EDEADLK) | |
1665 | goto backoff; | |
1666 | ||
1667 | drm_atomic_state_free(state); | |
1668 | ||
1669 | return ret; | |
1670 | backoff: | |
042652ed | 1671 | drm_atomic_state_clear(state); |
6f75cea6 | 1672 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1673 | |
1674 | goto retry; | |
1675 | } | |
1676 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
1677 | ||
1678 | /** | |
7f50002f | 1679 | * drm_atomic_helper_plane_set_property - helper for plane properties |
042652ed DV |
1680 | * @plane: DRM plane |
1681 | * @property: DRM property | |
1682 | * @val: value of property | |
1683 | * | |
7f50002f LP |
1684 | * Provides a default plane set_property handler using the atomic driver |
1685 | * interface. | |
042652ed DV |
1686 | * |
1687 | * RETURNS: | |
1688 | * Zero on success, error code on failure | |
1689 | */ | |
1690 | int | |
1691 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
1692 | struct drm_property *property, | |
1693 | uint64_t val) | |
1694 | { | |
1695 | struct drm_atomic_state *state; | |
1696 | struct drm_plane_state *plane_state; | |
1697 | int ret = 0; | |
1698 | ||
1699 | state = drm_atomic_state_alloc(plane->dev); | |
1700 | if (!state) | |
1701 | return -ENOMEM; | |
1702 | ||
1703 | /* ->set_property is always called with all locks held. */ | |
1704 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
1705 | retry: | |
1706 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1707 | if (IS_ERR(plane_state)) { | |
1708 | ret = PTR_ERR(plane_state); | |
1709 | goto fail; | |
1710 | } | |
1711 | ||
40ecc694 RC |
1712 | ret = drm_atomic_plane_set_property(plane, plane_state, |
1713 | property, val); | |
042652ed DV |
1714 | if (ret) |
1715 | goto fail; | |
1716 | ||
1717 | ret = drm_atomic_commit(state); | |
1718 | if (ret != 0) | |
1719 | goto fail; | |
1720 | ||
1721 | /* Driver takes ownership of state on successful commit. */ | |
1722 | return 0; | |
1723 | fail: | |
1724 | if (ret == -EDEADLK) | |
1725 | goto backoff; | |
1726 | ||
1727 | drm_atomic_state_free(state); | |
1728 | ||
1729 | return ret; | |
1730 | backoff: | |
042652ed | 1731 | drm_atomic_state_clear(state); |
6f75cea6 | 1732 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1733 | |
1734 | goto retry; | |
1735 | } | |
1736 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
1737 | ||
1738 | /** | |
7f50002f | 1739 | * drm_atomic_helper_connector_set_property - helper for connector properties |
042652ed DV |
1740 | * @connector: DRM connector |
1741 | * @property: DRM property | |
1742 | * @val: value of property | |
1743 | * | |
7f50002f LP |
1744 | * Provides a default connector set_property handler using the atomic driver |
1745 | * interface. | |
042652ed DV |
1746 | * |
1747 | * RETURNS: | |
1748 | * Zero on success, error code on failure | |
1749 | */ | |
1750 | int | |
1751 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
1752 | struct drm_property *property, | |
1753 | uint64_t val) | |
1754 | { | |
1755 | struct drm_atomic_state *state; | |
1756 | struct drm_connector_state *connector_state; | |
1757 | int ret = 0; | |
1758 | ||
1759 | state = drm_atomic_state_alloc(connector->dev); | |
1760 | if (!state) | |
1761 | return -ENOMEM; | |
1762 | ||
1763 | /* ->set_property is always called with all locks held. */ | |
1764 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
1765 | retry: | |
1766 | connector_state = drm_atomic_get_connector_state(state, connector); | |
1767 | if (IS_ERR(connector_state)) { | |
1768 | ret = PTR_ERR(connector_state); | |
1769 | goto fail; | |
1770 | } | |
1771 | ||
40ecc694 RC |
1772 | ret = drm_atomic_connector_set_property(connector, connector_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_connector_set_property); | |
8bc0f312 DV |
1797 | |
1798 | /** | |
1799 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
1800 | * @crtc: DRM crtc | |
1801 | * @fb: DRM framebuffer | |
1802 | * @event: optional DRM event to signal upon completion | |
1803 | * @flags: flip flags for non-vblank sync'ed updates | |
1804 | * | |
1805 | * Provides a default page flip implementation using the atomic driver interface. | |
1806 | * | |
1807 | * Note that for now so called async page flips (i.e. updates which are not | |
1808 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
1809 | * no provisions for this yet. | |
1810 | * | |
1811 | * Returns: | |
1812 | * Returns 0 on success, negative errno numbers on failure. | |
1813 | */ | |
1814 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
1815 | struct drm_framebuffer *fb, | |
1816 | struct drm_pending_vblank_event *event, | |
1817 | uint32_t flags) | |
1818 | { | |
1819 | struct drm_plane *plane = crtc->primary; | |
1820 | struct drm_atomic_state *state; | |
1821 | struct drm_plane_state *plane_state; | |
1822 | struct drm_crtc_state *crtc_state; | |
1823 | int ret = 0; | |
1824 | ||
1825 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
1826 | return -EINVAL; | |
1827 | ||
1828 | state = drm_atomic_state_alloc(plane->dev); | |
1829 | if (!state) | |
1830 | return -ENOMEM; | |
1831 | ||
1832 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1833 | retry: | |
1834 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1835 | if (IS_ERR(crtc_state)) { | |
1836 | ret = PTR_ERR(crtc_state); | |
1837 | goto fail; | |
1838 | } | |
1839 | crtc_state->event = event; | |
1840 | ||
1841 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1842 | if (IS_ERR(plane_state)) { | |
1843 | ret = PTR_ERR(plane_state); | |
1844 | goto fail; | |
1845 | } | |
1846 | ||
07cc0ef6 | 1847 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
8bc0f312 DV |
1848 | if (ret != 0) |
1849 | goto fail; | |
321ebf04 | 1850 | drm_atomic_set_fb_for_plane(plane_state, fb); |
8bc0f312 DV |
1851 | |
1852 | ret = drm_atomic_async_commit(state); | |
1853 | if (ret != 0) | |
1854 | goto fail; | |
1855 | ||
1856 | /* TODO: ->page_flip is the only driver callback where the core | |
1857 | * doesn't update plane->fb. For now patch it up here. */ | |
1858 | plane->fb = plane->state->fb; | |
1859 | ||
1860 | /* Driver takes ownership of state on successful async commit. */ | |
1861 | return 0; | |
1862 | fail: | |
1863 | if (ret == -EDEADLK) | |
1864 | goto backoff; | |
1865 | ||
1866 | drm_atomic_state_free(state); | |
1867 | ||
1868 | return ret; | |
1869 | backoff: | |
8bc0f312 | 1870 | drm_atomic_state_clear(state); |
6f75cea6 | 1871 | drm_atomic_legacy_backoff(state); |
8bc0f312 DV |
1872 | |
1873 | /* | |
1874 | * Someone might have exchanged the framebuffer while we dropped locks | |
1875 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1876 | * core does for us. | |
1877 | */ | |
1878 | plane->old_fb = plane->fb; | |
1879 | ||
1880 | goto retry; | |
1881 | } | |
1882 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
d461701c | 1883 | |
b486e0e6 DV |
1884 | /** |
1885 | * drm_atomic_helper_connector_dpms() - connector dpms helper implementation | |
1886 | * @connector: affected connector | |
1887 | * @mode: DPMS mode | |
1888 | * | |
1889 | * This is the main helper function provided by the atomic helper framework for | |
1890 | * implementing the legacy DPMS connector interface. It computes the new desired | |
1891 | * ->active state for the corresponding CRTC (if the connector is enabled) and | |
1892 | * updates it. | |
1893 | */ | |
1894 | void drm_atomic_helper_connector_dpms(struct drm_connector *connector, | |
1895 | int mode) | |
1896 | { | |
1897 | struct drm_mode_config *config = &connector->dev->mode_config; | |
1898 | struct drm_atomic_state *state; | |
1899 | struct drm_crtc_state *crtc_state; | |
1900 | struct drm_crtc *crtc; | |
1901 | struct drm_connector *tmp_connector; | |
1902 | int ret; | |
1903 | bool active = false; | |
1904 | ||
1905 | if (mode != DRM_MODE_DPMS_ON) | |
1906 | mode = DRM_MODE_DPMS_OFF; | |
1907 | ||
1908 | connector->dpms = mode; | |
1909 | crtc = connector->state->crtc; | |
1910 | ||
1911 | if (!crtc) | |
1912 | return; | |
1913 | ||
1914 | /* FIXME: ->dpms has no return value so can't forward the -ENOMEM. */ | |
1915 | state = drm_atomic_state_alloc(connector->dev); | |
1916 | if (!state) | |
1917 | return; | |
1918 | ||
1919 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1920 | retry: | |
1921 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1922 | if (IS_ERR(crtc_state)) | |
1923 | return; | |
1924 | ||
1925 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
1926 | ||
1927 | list_for_each_entry(tmp_connector, &config->connector_list, head) { | |
0388df05 | 1928 | if (tmp_connector->state->crtc != crtc) |
b486e0e6 DV |
1929 | continue; |
1930 | ||
0388df05 | 1931 | if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { |
b486e0e6 DV |
1932 | active = true; |
1933 | break; | |
1934 | } | |
1935 | } | |
1936 | crtc_state->active = active; | |
1937 | ||
1938 | ret = drm_atomic_commit(state); | |
1939 | if (ret != 0) | |
1940 | goto fail; | |
1941 | ||
1942 | /* Driver takes ownership of state on successful async commit. */ | |
1943 | return; | |
1944 | fail: | |
1945 | if (ret == -EDEADLK) | |
1946 | goto backoff; | |
1947 | ||
1948 | drm_atomic_state_free(state); | |
1949 | ||
1950 | WARN(1, "Driver bug: Changing ->active failed with ret=%i\n", ret); | |
1951 | ||
1952 | return; | |
1953 | backoff: | |
1954 | drm_atomic_state_clear(state); | |
1955 | drm_atomic_legacy_backoff(state); | |
1956 | ||
1957 | goto retry; | |
1958 | } | |
1959 | EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); | |
1960 | ||
3150c7d0 DV |
1961 | /** |
1962 | * DOC: atomic state reset and initialization | |
1963 | * | |
1964 | * Both the drm core and the atomic helpers assume that there is always the full | |
1965 | * and correct atomic software state for all connectors, CRTCs and planes | |
1966 | * available. Which is a bit a problem on driver load and also after system | |
1967 | * suspend. One way to solve this is to have a hardware state read-out | |
1968 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
1969 | * driver). | |
1970 | * | |
1971 | * The simpler solution is to just reset the software state to everything off, | |
1972 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
1973 | * the atomic helpers provide default reset implementations for all hooks. | |
1974 | */ | |
1975 | ||
d461701c DV |
1976 | /** |
1977 | * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs | |
1978 | * @crtc: drm CRTC | |
1979 | * | |
1980 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
1981 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
1982 | */ | |
1983 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
1984 | { | |
1985 | kfree(crtc->state); | |
1986 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
07cc0ef6 DV |
1987 | |
1988 | if (crtc->state) | |
1989 | crtc->state->crtc = crtc; | |
d461701c DV |
1990 | } |
1991 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
1992 | ||
f5e7840b TR |
1993 | /** |
1994 | * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state | |
1995 | * @crtc: CRTC object | |
1996 | * @state: atomic CRTC state | |
1997 | * | |
1998 | * Copies atomic state from a CRTC's current state and resets inferred values. | |
1999 | * This is useful for drivers that subclass the CRTC state. | |
2000 | */ | |
2001 | void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc, | |
2002 | struct drm_crtc_state *state) | |
2003 | { | |
2004 | memcpy(state, crtc->state, sizeof(*state)); | |
2005 | ||
2006 | state->mode_changed = false; | |
2007 | state->active_changed = false; | |
2008 | state->planes_changed = false; | |
2009 | state->event = NULL; | |
2010 | } | |
2011 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state); | |
2012 | ||
d461701c DV |
2013 | /** |
2014 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
2015 | * @crtc: drm CRTC | |
2016 | * | |
2017 | * Default CRTC state duplicate hook for drivers which don't have their own | |
2018 | * subclassed CRTC state structure. | |
2019 | */ | |
2020 | struct drm_crtc_state * | |
2021 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
2022 | { | |
2023 | struct drm_crtc_state *state; | |
2024 | ||
2025 | if (WARN_ON(!crtc->state)) | |
2026 | return NULL; | |
2027 | ||
f5e7840b TR |
2028 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2029 | if (state) | |
2030 | __drm_atomic_helper_crtc_duplicate_state(crtc, state); | |
d461701c DV |
2031 | |
2032 | return state; | |
2033 | } | |
2034 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
2035 | ||
f5e7840b TR |
2036 | /** |
2037 | * __drm_atomic_helper_crtc_destroy_state - release CRTC state | |
2038 | * @crtc: CRTC object | |
2039 | * @state: CRTC state object to release | |
2040 | * | |
2041 | * Releases all resources stored in the CRTC state without actually freeing | |
2042 | * the memory of the CRTC state. This is useful for drivers that subclass the | |
2043 | * CRTC state. | |
2044 | */ | |
2045 | void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
2046 | struct drm_crtc_state *state) | |
2047 | { | |
2048 | /* | |
2049 | * This is currently a placeholder so that drivers that subclass the | |
2050 | * state will automatically do the right thing if code is ever added | |
2051 | * to this function. | |
2052 | */ | |
2053 | } | |
2054 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); | |
2055 | ||
d461701c DV |
2056 | /** |
2057 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
2058 | * @crtc: drm CRTC | |
2059 | * @state: CRTC state object to release | |
2060 | * | |
2061 | * Default CRTC state destroy hook for drivers which don't have their own | |
2062 | * subclassed CRTC state structure. | |
2063 | */ | |
2064 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
2065 | struct drm_crtc_state *state) | |
2066 | { | |
f5e7840b | 2067 | __drm_atomic_helper_crtc_destroy_state(crtc, state); |
d461701c DV |
2068 | kfree(state); |
2069 | } | |
2070 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
2071 | ||
2072 | /** | |
2073 | * drm_atomic_helper_plane_reset - default ->reset hook for planes | |
2074 | * @plane: drm plane | |
2075 | * | |
2076 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
2077 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2078 | */ | |
2079 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
2080 | { | |
321ebf04 DV |
2081 | if (plane->state && plane->state->fb) |
2082 | drm_framebuffer_unreference(plane->state->fb); | |
2083 | ||
d461701c DV |
2084 | kfree(plane->state); |
2085 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
07cc0ef6 DV |
2086 | |
2087 | if (plane->state) | |
2088 | plane->state->plane = plane; | |
d461701c DV |
2089 | } |
2090 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
2091 | ||
f5e7840b TR |
2092 | /** |
2093 | * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state | |
2094 | * @plane: plane object | |
2095 | * @state: atomic plane state | |
2096 | * | |
2097 | * Copies atomic state from a plane's current state. This is useful for | |
2098 | * drivers that subclass the plane state. | |
2099 | */ | |
2100 | void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane, | |
2101 | struct drm_plane_state *state) | |
2102 | { | |
2103 | memcpy(state, plane->state, sizeof(*state)); | |
2104 | ||
2105 | if (state->fb) | |
2106 | drm_framebuffer_reference(state->fb); | |
2107 | } | |
2108 | EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state); | |
2109 | ||
d461701c DV |
2110 | /** |
2111 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
2112 | * @plane: drm plane | |
2113 | * | |
2114 | * Default plane state duplicate hook for drivers which don't have their own | |
2115 | * subclassed plane state structure. | |
2116 | */ | |
2117 | struct drm_plane_state * | |
2118 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
2119 | { | |
321ebf04 DV |
2120 | struct drm_plane_state *state; |
2121 | ||
d461701c DV |
2122 | if (WARN_ON(!plane->state)) |
2123 | return NULL; | |
2124 | ||
f5e7840b TR |
2125 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2126 | if (state) | |
2127 | __drm_atomic_helper_plane_duplicate_state(plane, state); | |
321ebf04 DV |
2128 | |
2129 | return state; | |
d461701c DV |
2130 | } |
2131 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
2132 | ||
f5e7840b TR |
2133 | /** |
2134 | * __drm_atomic_helper_plane_destroy_state - release plane state | |
2135 | * @plane: plane object | |
2136 | * @state: plane state object to release | |
2137 | * | |
2138 | * Releases all resources stored in the plane state without actually freeing | |
2139 | * the memory of the plane state. This is useful for drivers that subclass the | |
2140 | * plane state. | |
2141 | */ | |
2142 | void __drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
2143 | struct drm_plane_state *state) | |
2144 | { | |
2145 | if (state->fb) | |
2146 | drm_framebuffer_unreference(state->fb); | |
2147 | } | |
2148 | EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state); | |
2149 | ||
d461701c DV |
2150 | /** |
2151 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
2152 | * @plane: drm plane | |
2153 | * @state: plane state object to release | |
2154 | * | |
2155 | * Default plane state destroy hook for drivers which don't have their own | |
2156 | * subclassed plane state structure. | |
2157 | */ | |
2158 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
321ebf04 | 2159 | struct drm_plane_state *state) |
d461701c | 2160 | { |
f5e7840b | 2161 | __drm_atomic_helper_plane_destroy_state(plane, state); |
d461701c DV |
2162 | kfree(state); |
2163 | } | |
2164 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
2165 | ||
2166 | /** | |
2167 | * drm_atomic_helper_connector_reset - default ->reset hook for connectors | |
2168 | * @connector: drm connector | |
2169 | * | |
2170 | * Resets the atomic state for @connector by freeing the state pointer (which | |
2171 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
2172 | * object. | |
2173 | */ | |
2174 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
2175 | { | |
2176 | kfree(connector->state); | |
2177 | connector->state = kzalloc(sizeof(*connector->state), GFP_KERNEL); | |
07cc0ef6 DV |
2178 | |
2179 | if (connector->state) | |
2180 | connector->state->connector = connector; | |
d461701c DV |
2181 | } |
2182 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
2183 | ||
f5e7840b TR |
2184 | /** |
2185 | * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state | |
2186 | * @connector: connector object | |
2187 | * @state: atomic connector state | |
2188 | * | |
2189 | * Copies atomic state from a connector's current state. This is useful for | |
2190 | * drivers that subclass the connector state. | |
2191 | */ | |
2192 | void | |
2193 | __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector, | |
2194 | struct drm_connector_state *state) | |
2195 | { | |
2196 | memcpy(state, connector->state, sizeof(*state)); | |
2197 | } | |
2198 | EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state); | |
2199 | ||
d461701c DV |
2200 | /** |
2201 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
2202 | * @connector: drm connector | |
2203 | * | |
2204 | * Default connector state duplicate hook for drivers which don't have their own | |
2205 | * subclassed connector state structure. | |
2206 | */ | |
2207 | struct drm_connector_state * | |
2208 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
2209 | { | |
f5e7840b TR |
2210 | struct drm_connector_state *state; |
2211 | ||
d461701c DV |
2212 | if (WARN_ON(!connector->state)) |
2213 | return NULL; | |
2214 | ||
f5e7840b TR |
2215 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2216 | if (state) | |
2217 | __drm_atomic_helper_connector_duplicate_state(connector, state); | |
2218 | ||
2219 | return state; | |
d461701c DV |
2220 | } |
2221 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
2222 | ||
f5e7840b TR |
2223 | /** |
2224 | * __drm_atomic_helper_connector_destroy_state - release connector state | |
2225 | * @connector: connector object | |
2226 | * @state: connector state object to release | |
2227 | * | |
2228 | * Releases all resources stored in the connector state without actually | |
2229 | * freeing the memory of the connector state. This is useful for drivers that | |
2230 | * subclass the connector state. | |
2231 | */ | |
2232 | void | |
2233 | __drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
2234 | struct drm_connector_state *state) | |
2235 | { | |
2236 | /* | |
2237 | * This is currently a placeholder so that drivers that subclass the | |
2238 | * state will automatically do the right thing if code is ever added | |
2239 | * to this function. | |
2240 | */ | |
2241 | } | |
2242 | EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state); | |
2243 | ||
d461701c DV |
2244 | /** |
2245 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
2246 | * @connector: drm connector | |
2247 | * @state: connector state object to release | |
2248 | * | |
2249 | * Default connector state destroy hook for drivers which don't have their own | |
2250 | * subclassed connector state structure. | |
2251 | */ | |
2252 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
2253 | struct drm_connector_state *state) | |
2254 | { | |
f5e7840b | 2255 | __drm_atomic_helper_connector_destroy_state(connector, state); |
d461701c DV |
2256 | kfree(state); |
2257 | } | |
2258 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); |