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 | |
26196f7e DV |
45 | * drm_atomic_helper_check() and for the commit callback with |
46 | * drm_atomic_helper_commit(). But the individual stages and callbacks are | |
47 | * exposed to allow drivers to mix and match and e.g. use the plane helpers only | |
3150c7d0 DV |
48 | * together with a driver private modeset implementation. |
49 | * | |
50 | * This library also provides implementations for all the legacy driver | |
26196f7e DV |
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 | |
3150c7d0 DV |
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 | ||
97ac3204 DV |
83 | static bool |
84 | check_pending_encoder_assignment(struct drm_atomic_state *state, | |
85 | struct drm_encoder *new_encoder, | |
86 | struct drm_connector *new_connector) | |
87 | { | |
88 | struct drm_connector *connector; | |
89 | struct drm_connector_state *conn_state; | |
90 | int i; | |
91 | ||
92 | for_each_connector_in_state(state, connector, conn_state, i) { | |
93 | if (conn_state->best_encoder != new_encoder) | |
94 | continue; | |
95 | ||
96 | /* encoder already assigned and we're trying to re-steal it! */ | |
97 | if (connector->state->best_encoder != conn_state->best_encoder) | |
98 | return false; | |
99 | } | |
100 | ||
101 | return true; | |
102 | } | |
103 | ||
623369e5 DV |
104 | static struct drm_crtc * |
105 | get_current_crtc_for_encoder(struct drm_device *dev, | |
106 | struct drm_encoder *encoder) | |
107 | { | |
108 | struct drm_mode_config *config = &dev->mode_config; | |
109 | struct drm_connector *connector; | |
110 | ||
111 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
112 | ||
9a9f5ce8 | 113 | drm_for_each_connector(connector, dev) { |
623369e5 DV |
114 | if (connector->state->best_encoder != encoder) |
115 | continue; | |
116 | ||
117 | return connector->state->crtc; | |
118 | } | |
119 | ||
120 | return NULL; | |
121 | } | |
122 | ||
123 | static int | |
124 | steal_encoder(struct drm_atomic_state *state, | |
125 | struct drm_encoder *encoder, | |
126 | struct drm_crtc *encoder_crtc) | |
127 | { | |
128 | struct drm_mode_config *config = &state->dev->mode_config; | |
129 | struct drm_crtc_state *crtc_state; | |
130 | struct drm_connector *connector; | |
131 | struct drm_connector_state *connector_state; | |
042652ed | 132 | int ret; |
623369e5 DV |
133 | |
134 | /* | |
135 | * We can only steal an encoder coming from a connector, which means we | |
136 | * must already hold the connection_mutex. | |
137 | */ | |
138 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
139 | ||
17a38d9c DV |
140 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d], stealing it\n", |
141 | encoder->base.id, encoder->name, | |
142 | encoder_crtc->base.id); | |
623369e5 DV |
143 | |
144 | crtc_state = drm_atomic_get_crtc_state(state, encoder_crtc); | |
145 | if (IS_ERR(crtc_state)) | |
146 | return PTR_ERR(crtc_state); | |
147 | ||
fc596660 | 148 | crtc_state->connectors_changed = true; |
623369e5 DV |
149 | |
150 | list_for_each_entry(connector, &config->connector_list, head) { | |
151 | if (connector->state->best_encoder != encoder) | |
152 | continue; | |
153 | ||
17a38d9c DV |
154 | DRM_DEBUG_ATOMIC("Stealing encoder from [CONNECTOR:%d:%s]\n", |
155 | connector->base.id, | |
156 | connector->name); | |
623369e5 DV |
157 | |
158 | connector_state = drm_atomic_get_connector_state(state, | |
159 | connector); | |
160 | if (IS_ERR(connector_state)) | |
161 | return PTR_ERR(connector_state); | |
162 | ||
042652ed DV |
163 | ret = drm_atomic_set_crtc_for_connector(connector_state, NULL); |
164 | if (ret) | |
165 | return ret; | |
623369e5 DV |
166 | connector_state->best_encoder = NULL; |
167 | } | |
168 | ||
169 | return 0; | |
170 | } | |
171 | ||
172 | static int | |
173 | update_connector_routing(struct drm_atomic_state *state, int conn_idx) | |
174 | { | |
b5ceff20 | 175 | const struct drm_connector_helper_funcs *funcs; |
623369e5 DV |
176 | struct drm_encoder *new_encoder; |
177 | struct drm_crtc *encoder_crtc; | |
178 | struct drm_connector *connector; | |
179 | struct drm_connector_state *connector_state; | |
180 | struct drm_crtc_state *crtc_state; | |
181 | int idx, ret; | |
182 | ||
183 | connector = state->connectors[conn_idx]; | |
184 | connector_state = state->connector_states[conn_idx]; | |
185 | ||
186 | if (!connector) | |
187 | return 0; | |
188 | ||
17a38d9c DV |
189 | DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n", |
190 | connector->base.id, | |
191 | connector->name); | |
623369e5 DV |
192 | |
193 | if (connector->state->crtc != connector_state->crtc) { | |
194 | if (connector->state->crtc) { | |
195 | idx = drm_crtc_index(connector->state->crtc); | |
196 | ||
197 | crtc_state = state->crtc_states[idx]; | |
fc596660 | 198 | crtc_state->connectors_changed = true; |
623369e5 DV |
199 | } |
200 | ||
201 | if (connector_state->crtc) { | |
202 | idx = drm_crtc_index(connector_state->crtc); | |
203 | ||
204 | crtc_state = state->crtc_states[idx]; | |
fc596660 | 205 | crtc_state->connectors_changed = true; |
623369e5 DV |
206 | } |
207 | } | |
208 | ||
209 | if (!connector_state->crtc) { | |
17a38d9c | 210 | DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n", |
623369e5 DV |
211 | connector->base.id, |
212 | connector->name); | |
213 | ||
214 | connector_state->best_encoder = NULL; | |
215 | ||
216 | return 0; | |
217 | } | |
218 | ||
219 | funcs = connector->helper_private; | |
3b8a684b DV |
220 | |
221 | if (funcs->atomic_best_encoder) | |
222 | new_encoder = funcs->atomic_best_encoder(connector, | |
223 | connector_state); | |
224 | else | |
225 | new_encoder = funcs->best_encoder(connector); | |
623369e5 DV |
226 | |
227 | if (!new_encoder) { | |
17a38d9c DV |
228 | DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", |
229 | connector->base.id, | |
230 | connector->name); | |
623369e5 DV |
231 | return -EINVAL; |
232 | } | |
233 | ||
5481c8fb DV |
234 | if (!drm_encoder_crtc_ok(new_encoder, connector_state->crtc)) { |
235 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d]\n", | |
236 | new_encoder->base.id, | |
237 | new_encoder->name, | |
238 | connector_state->crtc->base.id); | |
239 | return -EINVAL; | |
240 | } | |
241 | ||
623369e5 | 242 | if (new_encoder == connector_state->best_encoder) { |
17a38d9c DV |
243 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d]\n", |
244 | connector->base.id, | |
245 | connector->name, | |
246 | new_encoder->base.id, | |
247 | new_encoder->name, | |
248 | connector_state->crtc->base.id); | |
623369e5 DV |
249 | |
250 | return 0; | |
251 | } | |
252 | ||
97ac3204 DV |
253 | if (!check_pending_encoder_assignment(state, new_encoder, connector)) { |
254 | DRM_DEBUG_ATOMIC("Encoder for [CONNECTOR:%d:%s] already assigned\n", | |
255 | connector->base.id, | |
256 | connector->name); | |
257 | return -EINVAL; | |
258 | } | |
259 | ||
623369e5 DV |
260 | encoder_crtc = get_current_crtc_for_encoder(state->dev, |
261 | new_encoder); | |
262 | ||
263 | if (encoder_crtc) { | |
264 | ret = steal_encoder(state, new_encoder, encoder_crtc); | |
265 | if (ret) { | |
17a38d9c DV |
266 | DRM_DEBUG_ATOMIC("Encoder stealing failed for [CONNECTOR:%d:%s]\n", |
267 | connector->base.id, | |
268 | connector->name); | |
623369e5 DV |
269 | return ret; |
270 | } | |
271 | } | |
272 | ||
6ea76f3c DV |
273 | if (WARN_ON(!connector_state->crtc)) |
274 | return -EINVAL; | |
275 | ||
623369e5 DV |
276 | connector_state->best_encoder = new_encoder; |
277 | idx = drm_crtc_index(connector_state->crtc); | |
278 | ||
279 | crtc_state = state->crtc_states[idx]; | |
fc596660 | 280 | crtc_state->connectors_changed = true; |
623369e5 | 281 | |
17a38d9c DV |
282 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d]\n", |
283 | connector->base.id, | |
284 | connector->name, | |
285 | new_encoder->base.id, | |
286 | new_encoder->name, | |
287 | connector_state->crtc->base.id); | |
623369e5 DV |
288 | |
289 | return 0; | |
290 | } | |
291 | ||
292 | static int | |
293 | mode_fixup(struct drm_atomic_state *state) | |
294 | { | |
df63b999 | 295 | struct drm_crtc *crtc; |
623369e5 | 296 | struct drm_crtc_state *crtc_state; |
df63b999 | 297 | struct drm_connector *connector; |
623369e5 DV |
298 | struct drm_connector_state *conn_state; |
299 | int i; | |
300 | bool ret; | |
301 | ||
df63b999 | 302 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
fc596660 ML |
303 | if (!crtc_state->mode_changed && |
304 | !crtc_state->connectors_changed) | |
623369e5 DV |
305 | continue; |
306 | ||
307 | drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); | |
308 | } | |
309 | ||
df63b999 | 310 | for_each_connector_in_state(state, connector, conn_state, i) { |
b5ceff20 | 311 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
312 | struct drm_encoder *encoder; |
313 | ||
623369e5 DV |
314 | WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); |
315 | ||
316 | if (!conn_state->crtc || !conn_state->best_encoder) | |
317 | continue; | |
318 | ||
319 | crtc_state = | |
320 | state->crtc_states[drm_crtc_index(conn_state->crtc)]; | |
321 | ||
322 | /* | |
323 | * Each encoder has at most one connector (since we always steal | |
324 | * it away), so we won't call ->mode_fixup twice. | |
325 | */ | |
326 | encoder = conn_state->best_encoder; | |
327 | funcs = encoder->helper_private; | |
840bfe95 ACO |
328 | if (!funcs) |
329 | continue; | |
623369e5 | 330 | |
862e686c AT |
331 | ret = drm_bridge_mode_fixup(encoder->bridge, &crtc_state->mode, |
332 | &crtc_state->adjusted_mode); | |
333 | if (!ret) { | |
334 | DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); | |
335 | return -EINVAL; | |
623369e5 DV |
336 | } |
337 | ||
4cd4df80 TR |
338 | if (funcs->atomic_check) { |
339 | ret = funcs->atomic_check(encoder, crtc_state, | |
340 | conn_state); | |
341 | if (ret) { | |
17a38d9c DV |
342 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", |
343 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
344 | return ret; |
345 | } | |
84524917 | 346 | } else if (funcs->mode_fixup) { |
4cd4df80 TR |
347 | ret = funcs->mode_fixup(encoder, &crtc_state->mode, |
348 | &crtc_state->adjusted_mode); | |
349 | if (!ret) { | |
17a38d9c DV |
350 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", |
351 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
352 | return -EINVAL; |
353 | } | |
623369e5 DV |
354 | } |
355 | } | |
356 | ||
df63b999 | 357 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 358 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 359 | |
fc596660 ML |
360 | if (!crtc_state->mode_changed && |
361 | !crtc_state->connectors_changed) | |
623369e5 DV |
362 | continue; |
363 | ||
364 | funcs = crtc->helper_private; | |
840bfe95 ACO |
365 | if (!funcs->mode_fixup) |
366 | continue; | |
367 | ||
623369e5 DV |
368 | ret = funcs->mode_fixup(crtc, &crtc_state->mode, |
369 | &crtc_state->adjusted_mode); | |
370 | if (!ret) { | |
17a38d9c DV |
371 | DRM_DEBUG_ATOMIC("[CRTC:%d] fixup failed\n", |
372 | crtc->base.id); | |
623369e5 DV |
373 | return -EINVAL; |
374 | } | |
375 | } | |
376 | ||
377 | return 0; | |
378 | } | |
379 | ||
d9b13620 | 380 | /** |
f98bd3ef | 381 | * drm_atomic_helper_check_modeset - validate state object for modeset changes |
d9b13620 DV |
382 | * @dev: DRM device |
383 | * @state: the driver state object | |
384 | * | |
385 | * Check the state object to see if the requested state is physically possible. | |
386 | * This does all the crtc and connector related computations for an atomic | |
fc596660 ML |
387 | * update and adds any additional connectors needed for full modesets and calls |
388 | * down into ->mode_fixup functions of the driver backend. | |
389 | * | |
390 | * crtc_state->mode_changed is set when the input mode is changed. | |
391 | * crtc_state->connectors_changed is set when a connector is added or | |
392 | * removed from the crtc. | |
393 | * crtc_state->active_changed is set when crtc_state->active changes, | |
394 | * which is used for dpms. | |
d9b13620 DV |
395 | * |
396 | * IMPORTANT: | |
397 | * | |
398 | * Drivers which update ->mode_changed (e.g. in their ->atomic_check hooks if a | |
399 | * plane update can't be done without a full modeset) _must_ call this function | |
400 | * afterwards after that change. It is permitted to call this function multiple | |
401 | * times for the same update, e.g. when the ->atomic_check functions depend upon | |
402 | * the adjusted dotclock for fifo space allocation and watermark computation. | |
403 | * | |
404 | * RETURNS | |
405 | * Zero for success or -errno | |
406 | */ | |
407 | int | |
934ce1c2 | 408 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
409 | struct drm_atomic_state *state) |
410 | { | |
623369e5 DV |
411 | struct drm_crtc *crtc; |
412 | struct drm_crtc_state *crtc_state; | |
df63b999 ACO |
413 | struct drm_connector *connector; |
414 | struct drm_connector_state *connector_state; | |
623369e5 DV |
415 | int i, ret; |
416 | ||
df63b999 | 417 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 | 418 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { |
17a38d9c DV |
419 | DRM_DEBUG_ATOMIC("[CRTC:%d] mode changed\n", |
420 | crtc->base.id); | |
623369e5 DV |
421 | crtc_state->mode_changed = true; |
422 | } | |
423 | ||
424 | if (crtc->state->enable != crtc_state->enable) { | |
17a38d9c DV |
425 | DRM_DEBUG_ATOMIC("[CRTC:%d] enable changed\n", |
426 | crtc->base.id); | |
fc596660 ML |
427 | |
428 | /* | |
429 | * For clarity this assignment is done here, but | |
430 | * enable == 0 is only true when there are no | |
431 | * connectors and a NULL mode. | |
432 | * | |
433 | * The other way around is true as well. enable != 0 | |
434 | * iff connectors are attached and a mode is set. | |
435 | */ | |
623369e5 | 436 | crtc_state->mode_changed = true; |
fc596660 | 437 | crtc_state->connectors_changed = true; |
623369e5 DV |
438 | } |
439 | } | |
440 | ||
df63b999 | 441 | for_each_connector_in_state(state, connector, connector_state, i) { |
623369e5 DV |
442 | /* |
443 | * This only sets crtc->mode_changed for routing changes, | |
444 | * drivers must set crtc->mode_changed themselves when connector | |
445 | * properties need to be updated. | |
446 | */ | |
447 | ret = update_connector_routing(state, i); | |
448 | if (ret) | |
449 | return ret; | |
450 | } | |
451 | ||
452 | /* | |
453 | * After all the routing has been prepared we need to add in any | |
454 | * connector which is itself unchanged, but who's crtc changes it's | |
455 | * configuration. This must be done before calling mode_fixup in case a | |
456 | * crtc only changed its mode but has the same set of connectors. | |
457 | */ | |
df63b999 | 458 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 DV |
459 | int num_connectors; |
460 | ||
eab3bbef DV |
461 | /* |
462 | * We must set ->active_changed after walking connectors for | |
463 | * otherwise an update that only changes active would result in | |
464 | * a full modeset because update_connector_routing force that. | |
465 | */ | |
466 | if (crtc->state->active != crtc_state->active) { | |
17a38d9c DV |
467 | DRM_DEBUG_ATOMIC("[CRTC:%d] active changed\n", |
468 | crtc->base.id); | |
eab3bbef DV |
469 | crtc_state->active_changed = true; |
470 | } | |
471 | ||
2465ff62 | 472 | if (!drm_atomic_crtc_needs_modeset(crtc_state)) |
623369e5 DV |
473 | continue; |
474 | ||
17a38d9c DV |
475 | DRM_DEBUG_ATOMIC("[CRTC:%d] needs all connectors, enable: %c, active: %c\n", |
476 | crtc->base.id, | |
477 | crtc_state->enable ? 'y' : 'n', | |
eab3bbef | 478 | crtc_state->active ? 'y' : 'n'); |
623369e5 DV |
479 | |
480 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
481 | if (ret != 0) | |
482 | return ret; | |
483 | ||
57744aa7 ML |
484 | ret = drm_atomic_add_affected_planes(state, crtc); |
485 | if (ret != 0) | |
486 | return ret; | |
487 | ||
623369e5 DV |
488 | num_connectors = drm_atomic_connectors_for_crtc(state, |
489 | crtc); | |
490 | ||
491 | if (crtc_state->enable != !!num_connectors) { | |
17a38d9c DV |
492 | DRM_DEBUG_ATOMIC("[CRTC:%d] enabled/connectors mismatch\n", |
493 | crtc->base.id); | |
623369e5 DV |
494 | |
495 | return -EINVAL; | |
496 | } | |
497 | } | |
498 | ||
499 | return mode_fixup(state); | |
500 | } | |
d9b13620 | 501 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 502 | |
c2fcd274 | 503 | /** |
f98bd3ef | 504 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
505 | * @dev: DRM device |
506 | * @state: the driver state object | |
507 | * | |
508 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 DV |
509 | * This does all the plane update related checks using by calling into the |
510 | * ->atomic_check hooks provided by the driver. | |
c2fcd274 | 511 | * |
fc596660 ML |
512 | * It also sets crtc_state->planes_changed to indicate that a crtc has |
513 | * updated planes. | |
514 | * | |
c2fcd274 DV |
515 | * RETURNS |
516 | * Zero for success or -errno | |
517 | */ | |
d9b13620 DV |
518 | int |
519 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
520 | struct drm_atomic_state *state) | |
c2fcd274 | 521 | { |
df63b999 ACO |
522 | struct drm_crtc *crtc; |
523 | struct drm_crtc_state *crtc_state; | |
524 | struct drm_plane *plane; | |
525 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
526 | int i, ret = 0; |
527 | ||
df63b999 | 528 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 529 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
530 | |
531 | funcs = plane->helper_private; | |
532 | ||
533 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
534 | ||
535 | if (!funcs || !funcs->atomic_check) | |
536 | continue; | |
537 | ||
538 | ret = funcs->atomic_check(plane, plane_state); | |
539 | if (ret) { | |
17a38d9c DV |
540 | DRM_DEBUG_ATOMIC("[PLANE:%d] atomic driver check failed\n", |
541 | plane->base.id); | |
c2fcd274 DV |
542 | return ret; |
543 | } | |
544 | } | |
545 | ||
df63b999 | 546 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 547 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
548 | |
549 | funcs = crtc->helper_private; | |
550 | ||
551 | if (!funcs || !funcs->atomic_check) | |
552 | continue; | |
553 | ||
554 | ret = funcs->atomic_check(crtc, state->crtc_states[i]); | |
555 | if (ret) { | |
17a38d9c DV |
556 | DRM_DEBUG_ATOMIC("[CRTC:%d] atomic driver check failed\n", |
557 | crtc->base.id); | |
c2fcd274 DV |
558 | return ret; |
559 | } | |
560 | } | |
561 | ||
d9b13620 DV |
562 | return ret; |
563 | } | |
564 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
565 | ||
566 | /** | |
567 | * drm_atomic_helper_check - validate state object | |
568 | * @dev: DRM device | |
569 | * @state: the driver state object | |
570 | * | |
571 | * Check the state object to see if the requested state is physically possible. | |
572 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
573 | * checking that a driver needs it can simply wrap that around this function. | |
574 | * Drivers without such needs can directly use this as their ->atomic_check() | |
575 | * callback. | |
576 | * | |
b4274fbe DV |
577 | * This just wraps the two parts of the state checking for planes and modeset |
578 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
579 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
580 | * ->atomic_check functions depend upon an updated adjusted_mode.clock to | |
581 | * e.g. properly compute watermarks. | |
582 | * | |
d9b13620 DV |
583 | * RETURNS |
584 | * Zero for success or -errno | |
585 | */ | |
586 | int drm_atomic_helper_check(struct drm_device *dev, | |
587 | struct drm_atomic_state *state) | |
588 | { | |
589 | int ret; | |
590 | ||
b4274fbe | 591 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
592 | if (ret) |
593 | return ret; | |
594 | ||
b4274fbe | 595 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
596 | if (ret) |
597 | return ret; | |
598 | ||
c2fcd274 DV |
599 | return ret; |
600 | } | |
601 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
602 | ||
623369e5 DV |
603 | static void |
604 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
605 | { | |
df63b999 ACO |
606 | struct drm_connector *connector; |
607 | struct drm_connector_state *old_conn_state; | |
608 | struct drm_crtc *crtc; | |
609 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
610 | int i; |
611 | ||
df63b999 | 612 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 613 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 614 | struct drm_encoder *encoder; |
eab3bbef | 615 | struct drm_crtc_state *old_crtc_state; |
623369e5 | 616 | |
623369e5 DV |
617 | /* Shut down everything that's in the changeset and currently |
618 | * still on. So need to check the old, saved state. */ | |
df63b999 | 619 | if (!old_conn_state->crtc) |
623369e5 DV |
620 | continue; |
621 | ||
eab3bbef DV |
622 | old_crtc_state = old_state->crtc_states[drm_crtc_index(old_conn_state->crtc)]; |
623 | ||
4218a32f | 624 | if (!old_crtc_state->active || |
2465ff62 | 625 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) |
eab3bbef DV |
626 | continue; |
627 | ||
46df9adb | 628 | encoder = old_conn_state->best_encoder; |
623369e5 | 629 | |
46df9adb RC |
630 | /* We shouldn't get this far if we didn't previously have |
631 | * an encoder.. but WARN_ON() rather than explode. | |
632 | */ | |
633 | if (WARN_ON(!encoder)) | |
623369e5 DV |
634 | continue; |
635 | ||
636 | funcs = encoder->helper_private; | |
637 | ||
17a38d9c DV |
638 | DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
639 | encoder->base.id, encoder->name); | |
95d6eb3b | 640 | |
623369e5 DV |
641 | /* |
642 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 643 | * it away), so we won't call disable hooks twice. |
623369e5 | 644 | */ |
862e686c | 645 | drm_bridge_disable(encoder->bridge); |
623369e5 DV |
646 | |
647 | /* Right function depends upon target state. */ | |
ee0a89cf | 648 | if (connector->state->crtc && funcs->prepare) |
623369e5 DV |
649 | funcs->prepare(encoder); |
650 | else if (funcs->disable) | |
651 | funcs->disable(encoder); | |
652 | else | |
653 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
654 | ||
862e686c | 655 | drm_bridge_post_disable(encoder->bridge); |
623369e5 DV |
656 | } |
657 | ||
df63b999 | 658 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 659 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
660 | |
661 | /* Shut down everything that needs a full modeset. */ | |
2465ff62 | 662 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
663 | continue; |
664 | ||
665 | if (!old_crtc_state->active) | |
623369e5 DV |
666 | continue; |
667 | ||
668 | funcs = crtc->helper_private; | |
669 | ||
17a38d9c DV |
670 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d]\n", |
671 | crtc->base.id); | |
95d6eb3b DV |
672 | |
673 | ||
623369e5 | 674 | /* Right function depends upon target state. */ |
ee0a89cf | 675 | if (crtc->state->enable && funcs->prepare) |
623369e5 DV |
676 | funcs->prepare(crtc); |
677 | else if (funcs->disable) | |
678 | funcs->disable(crtc); | |
679 | else | |
680 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
681 | } | |
682 | } | |
683 | ||
4c18d301 DV |
684 | /** |
685 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state | |
686 | * @dev: DRM device | |
687 | * @old_state: atomic state object with old state structures | |
688 | * | |
689 | * This function updates all the various legacy modeset state pointers in | |
690 | * connectors, encoders and crtcs. It also updates the timestamping constants | |
691 | * used for precise vblank timestamps by calling | |
692 | * drm_calc_timestamping_constants(). | |
693 | * | |
694 | * Drivers can use this for building their own atomic commit if they don't have | |
695 | * a pure helper-based modeset implementation. | |
696 | */ | |
697 | void | |
698 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, | |
699 | struct drm_atomic_state *old_state) | |
623369e5 | 700 | { |
df63b999 ACO |
701 | struct drm_connector *connector; |
702 | struct drm_connector_state *old_conn_state; | |
703 | struct drm_crtc *crtc; | |
704 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
705 | int i; |
706 | ||
8c10342c | 707 | /* clear out existing links and update dpms */ |
df63b999 | 708 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
8c10342c ML |
709 | if (connector->encoder) { |
710 | WARN_ON(!connector->encoder->crtc); | |
711 | ||
712 | connector->encoder->crtc = NULL; | |
713 | connector->encoder = NULL; | |
714 | } | |
623369e5 | 715 | |
8c10342c ML |
716 | crtc = connector->state->crtc; |
717 | if ((!crtc && old_conn_state->crtc) || | |
718 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { | |
719 | struct drm_property *dpms_prop = | |
720 | dev->mode_config.dpms_property; | |
721 | int mode = DRM_MODE_DPMS_OFF; | |
623369e5 | 722 | |
8c10342c ML |
723 | if (crtc && crtc->state->active) |
724 | mode = DRM_MODE_DPMS_ON; | |
725 | ||
726 | connector->dpms = mode; | |
727 | drm_object_property_set_value(&connector->base, | |
728 | dpms_prop, mode); | |
729 | } | |
623369e5 DV |
730 | } |
731 | ||
732 | /* set new links */ | |
df63b999 ACO |
733 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
734 | if (!connector->state->crtc) | |
623369e5 DV |
735 | continue; |
736 | ||
737 | if (WARN_ON(!connector->state->best_encoder)) | |
738 | continue; | |
739 | ||
740 | connector->encoder = connector->state->best_encoder; | |
741 | connector->encoder->crtc = connector->state->crtc; | |
742 | } | |
743 | ||
744 | /* set legacy state in the crtc structure */ | |
df63b999 | 745 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
2660801f ML |
746 | struct drm_plane *primary = crtc->primary; |
747 | ||
623369e5 DV |
748 | crtc->mode = crtc->state->mode; |
749 | crtc->enabled = crtc->state->enable; | |
2660801f ML |
750 | |
751 | if (drm_atomic_get_existing_plane_state(old_state, primary) && | |
752 | primary->state->crtc == crtc) { | |
753 | crtc->x = primary->state->src_x >> 16; | |
754 | crtc->y = primary->state->src_y >> 16; | |
755 | } | |
3d51d2d2 DV |
756 | |
757 | if (crtc->state->enable) | |
758 | drm_calc_timestamping_constants(crtc, | |
759 | &crtc->state->adjusted_mode); | |
623369e5 DV |
760 | } |
761 | } | |
4c18d301 | 762 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); |
623369e5 DV |
763 | |
764 | static void | |
765 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
766 | { | |
df63b999 ACO |
767 | struct drm_crtc *crtc; |
768 | struct drm_crtc_state *old_crtc_state; | |
769 | struct drm_connector *connector; | |
770 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
771 | int i; |
772 | ||
df63b999 | 773 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 774 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 775 | |
df63b999 | 776 | if (!crtc->state->mode_changed) |
623369e5 DV |
777 | continue; |
778 | ||
779 | funcs = crtc->helper_private; | |
780 | ||
c982bd90 | 781 | if (crtc->state->enable && funcs->mode_set_nofb) { |
17a38d9c DV |
782 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d]\n", |
783 | crtc->base.id); | |
95d6eb3b | 784 | |
623369e5 | 785 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 786 | } |
623369e5 DV |
787 | } |
788 | ||
df63b999 | 789 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 790 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 791 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
792 | struct drm_encoder *encoder; |
793 | struct drm_display_mode *mode, *adjusted_mode; | |
794 | ||
df63b999 | 795 | if (!connector->state->best_encoder) |
623369e5 DV |
796 | continue; |
797 | ||
798 | encoder = connector->state->best_encoder; | |
799 | funcs = encoder->helper_private; | |
800 | new_crtc_state = connector->state->crtc->state; | |
801 | mode = &new_crtc_state->mode; | |
802 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
803 | ||
eab3bbef DV |
804 | if (!new_crtc_state->mode_changed) |
805 | continue; | |
806 | ||
17a38d9c DV |
807 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
808 | encoder->base.id, encoder->name); | |
95d6eb3b | 809 | |
623369e5 DV |
810 | /* |
811 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 812 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 813 | */ |
c982bd90 DV |
814 | if (funcs->mode_set) |
815 | funcs->mode_set(encoder, mode, adjusted_mode); | |
623369e5 | 816 | |
862e686c | 817 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
623369e5 DV |
818 | } |
819 | } | |
820 | ||
821 | /** | |
1af434a9 | 822 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 823 | * @dev: DRM device |
a072f809 | 824 | * @old_state: atomic state object with old state structures |
623369e5 | 825 | * |
1af434a9 | 826 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 827 | * prepares them (if required) with the new mode. |
1af434a9 | 828 | * |
60acc4eb | 829 | * For compatibility with legacy crtc helpers this should be called before |
1af434a9 DV |
830 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
831 | * does. But drivers with different needs can group the modeset commits together | |
832 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
833 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 834 | */ |
1af434a9 DV |
835 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
836 | struct drm_atomic_state *old_state) | |
623369e5 | 837 | { |
a072f809 | 838 | disable_outputs(dev, old_state); |
4c18d301 DV |
839 | |
840 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); | |
841 | ||
a072f809 | 842 | crtc_set_mode(dev, old_state); |
623369e5 | 843 | } |
1af434a9 | 844 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 DV |
845 | |
846 | /** | |
1af434a9 | 847 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
848 | * @dev: DRM device |
849 | * @old_state: atomic state object with old state structures | |
850 | * | |
1af434a9 DV |
851 | * This function enables all the outputs with the new configuration which had to |
852 | * be turned off for the update. | |
853 | * | |
60acc4eb | 854 | * For compatibility with legacy crtc helpers this should be called after |
1af434a9 DV |
855 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
856 | * does. But drivers with different needs can group the modeset commits together | |
857 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
858 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 859 | */ |
1af434a9 DV |
860 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
861 | struct drm_atomic_state *old_state) | |
623369e5 | 862 | { |
df63b999 ACO |
863 | struct drm_crtc *crtc; |
864 | struct drm_crtc_state *old_crtc_state; | |
865 | struct drm_connector *connector; | |
866 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
867 | int i; |
868 | ||
df63b999 | 869 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 870 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
871 | |
872 | /* Need to filter out CRTCs where only planes change. */ | |
2465ff62 | 873 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
874 | continue; |
875 | ||
876 | if (!crtc->state->active) | |
623369e5 DV |
877 | continue; |
878 | ||
879 | funcs = crtc->helper_private; | |
880 | ||
ee0a89cf | 881 | if (crtc->state->enable) { |
17a38d9c DV |
882 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d]\n", |
883 | crtc->base.id); | |
95d6eb3b | 884 | |
ee0a89cf DV |
885 | if (funcs->enable) |
886 | funcs->enable(crtc); | |
887 | else | |
888 | funcs->commit(crtc); | |
889 | } | |
623369e5 DV |
890 | } |
891 | ||
df63b999 | 892 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 893 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
894 | struct drm_encoder *encoder; |
895 | ||
df63b999 | 896 | if (!connector->state->best_encoder) |
623369e5 DV |
897 | continue; |
898 | ||
4218a32f | 899 | if (!connector->state->crtc->state->active || |
2465ff62 | 900 | !drm_atomic_crtc_needs_modeset(connector->state->crtc->state)) |
eab3bbef DV |
901 | continue; |
902 | ||
623369e5 DV |
903 | encoder = connector->state->best_encoder; |
904 | funcs = encoder->helper_private; | |
905 | ||
17a38d9c DV |
906 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
907 | encoder->base.id, encoder->name); | |
95d6eb3b | 908 | |
623369e5 DV |
909 | /* |
910 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 911 | * it away), so we won't call enable hooks twice. |
623369e5 | 912 | */ |
862e686c | 913 | drm_bridge_pre_enable(encoder->bridge); |
623369e5 | 914 | |
ee0a89cf DV |
915 | if (funcs->enable) |
916 | funcs->enable(encoder); | |
917 | else | |
918 | funcs->commit(encoder); | |
623369e5 | 919 | |
862e686c | 920 | drm_bridge_enable(encoder->bridge); |
623369e5 DV |
921 | } |
922 | } | |
1af434a9 | 923 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 924 | |
e2330f07 DV |
925 | static void wait_for_fences(struct drm_device *dev, |
926 | struct drm_atomic_state *state) | |
927 | { | |
df63b999 ACO |
928 | struct drm_plane *plane; |
929 | struct drm_plane_state *plane_state; | |
e2330f07 DV |
930 | int i; |
931 | ||
df63b999 ACO |
932 | for_each_plane_in_state(state, plane, plane_state, i) { |
933 | if (!plane->state->fence) | |
e2330f07 DV |
934 | continue; |
935 | ||
936 | WARN_ON(!plane->state->fb); | |
937 | ||
938 | fence_wait(plane->state->fence, false); | |
939 | fence_put(plane->state->fence); | |
940 | plane->state->fence = NULL; | |
941 | } | |
942 | } | |
943 | ||
ab58e338 DV |
944 | static bool framebuffer_changed(struct drm_device *dev, |
945 | struct drm_atomic_state *old_state, | |
946 | struct drm_crtc *crtc) | |
947 | { | |
948 | struct drm_plane *plane; | |
949 | struct drm_plane_state *old_plane_state; | |
ab58e338 DV |
950 | int i; |
951 | ||
df63b999 | 952 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
ab58e338 DV |
953 | if (plane->state->crtc != crtc && |
954 | old_plane_state->crtc != crtc) | |
955 | continue; | |
956 | ||
957 | if (plane->state->fb != old_plane_state->fb) | |
958 | return true; | |
959 | } | |
960 | ||
961 | return false; | |
962 | } | |
963 | ||
5ee3229c RC |
964 | /** |
965 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
966 | * @dev: DRM device | |
967 | * @old_state: atomic state object with old state structures | |
968 | * | |
969 | * Helper to, after atomic commit, wait for vblanks on all effected | |
970 | * crtcs (ie. before cleaning up old framebuffers using | |
ab58e338 DV |
971 | * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
972 | * framebuffers have actually changed to optimize for the legacy cursor and | |
973 | * plane update use-case. | |
5ee3229c RC |
974 | */ |
975 | void | |
976 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
977 | struct drm_atomic_state *old_state) | |
623369e5 DV |
978 | { |
979 | struct drm_crtc *crtc; | |
980 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
981 | int i, ret; |
982 | ||
df63b999 | 983 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
623369e5 DV |
984 | /* No one cares about the old state, so abuse it for tracking |
985 | * and store whether we hold a vblank reference (and should do a | |
986 | * vblank wait) in the ->enable boolean. */ | |
987 | old_crtc_state->enable = false; | |
988 | ||
989 | if (!crtc->state->enable) | |
990 | continue; | |
991 | ||
f02ad907 DV |
992 | /* Legacy cursor ioctls are completely unsynced, and userspace |
993 | * relies on that (by doing tons of cursor updates). */ | |
994 | if (old_state->legacy_cursor_update) | |
995 | continue; | |
996 | ||
ab58e338 DV |
997 | if (!framebuffer_changed(dev, old_state, crtc)) |
998 | continue; | |
999 | ||
623369e5 DV |
1000 | ret = drm_crtc_vblank_get(crtc); |
1001 | if (ret != 0) | |
1002 | continue; | |
1003 | ||
1004 | old_crtc_state->enable = true; | |
d4853630 | 1005 | old_crtc_state->last_vblank_count = drm_crtc_vblank_count(crtc); |
623369e5 DV |
1006 | } |
1007 | ||
df63b999 ACO |
1008 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
1009 | if (!old_crtc_state->enable) | |
623369e5 DV |
1010 | continue; |
1011 | ||
1012 | ret = wait_event_timeout(dev->vblank[i].queue, | |
1013 | old_crtc_state->last_vblank_count != | |
d4853630 | 1014 | drm_crtc_vblank_count(crtc), |
623369e5 DV |
1015 | msecs_to_jiffies(50)); |
1016 | ||
1017 | drm_crtc_vblank_put(crtc); | |
1018 | } | |
1019 | } | |
5ee3229c | 1020 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 DV |
1021 | |
1022 | /** | |
1023 | * drm_atomic_helper_commit - commit validated state object | |
1024 | * @dev: DRM device | |
1025 | * @state: the driver state object | |
1026 | * @async: asynchronous commit | |
1027 | * | |
1028 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
1029 | * object. This can still fail when e.g. the framebuffer reservation fails. For | |
1030 | * now this doesn't implement asynchronous commits. | |
1031 | * | |
6e48ae32 DV |
1032 | * Note that right now this function does not support async commits, and hence |
1033 | * driver writers must implement their own version for now. Also note that the | |
1034 | * default ordering of how the various stages are called is to match the legacy | |
1035 | * modeset helper library closest. One peculiarity of that is that it doesn't | |
1036 | * mesh well with runtime PM at all. | |
1037 | * | |
1038 | * For drivers supporting runtime PM the recommended sequence is | |
1039 | * | |
1040 | * drm_atomic_helper_commit_modeset_disables(dev, state); | |
1041 | * | |
1042 | * drm_atomic_helper_commit_modeset_enables(dev, state); | |
1043 | * | |
1044 | * drm_atomic_helper_commit_planes(dev, state, true); | |
1045 | * | |
1046 | * See the kerneldoc entries for these three functions for more details. | |
1047 | * | |
623369e5 DV |
1048 | * RETURNS |
1049 | * Zero for success or -errno. | |
1050 | */ | |
1051 | int drm_atomic_helper_commit(struct drm_device *dev, | |
1052 | struct drm_atomic_state *state, | |
1053 | bool async) | |
1054 | { | |
1055 | int ret; | |
1056 | ||
1057 | if (async) | |
1058 | return -EBUSY; | |
1059 | ||
1060 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
1061 | if (ret) | |
1062 | return ret; | |
1063 | ||
1064 | /* | |
1065 | * This is the point of no return - everything below never fails except | |
1066 | * when the hw goes bonghits. Which means we can commit the new state on | |
1067 | * the software side now. | |
1068 | */ | |
1069 | ||
1070 | drm_atomic_helper_swap_state(dev, state); | |
1071 | ||
1072 | /* | |
1073 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 1074 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
1075 | * that the asynchronous work has either been cancelled (if the driver |
1076 | * supports it, which at least requires that the framebuffers get | |
1077 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
1078 | * before the new state gets committed on the software side with | |
1079 | * drm_atomic_helper_swap_state(). | |
1080 | * | |
1081 | * This scheme allows new atomic state updates to be prepared and | |
1082 | * checked in parallel to the asynchronous completion of the previous | |
1083 | * update. Which is important since compositors need to figure out the | |
1084 | * composition of the next frame right after having submitted the | |
1085 | * current layout. | |
1086 | */ | |
1087 | ||
e2330f07 DV |
1088 | wait_for_fences(dev, state); |
1089 | ||
1af434a9 | 1090 | drm_atomic_helper_commit_modeset_disables(dev, state); |
623369e5 | 1091 | |
aef9dbb8 | 1092 | drm_atomic_helper_commit_planes(dev, state, false); |
623369e5 | 1093 | |
1af434a9 | 1094 | drm_atomic_helper_commit_modeset_enables(dev, state); |
623369e5 | 1095 | |
5ee3229c | 1096 | drm_atomic_helper_wait_for_vblanks(dev, state); |
623369e5 DV |
1097 | |
1098 | drm_atomic_helper_cleanup_planes(dev, state); | |
1099 | ||
1100 | drm_atomic_state_free(state); | |
1101 | ||
1102 | return 0; | |
1103 | } | |
1104 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1105 | ||
e8c833a7 DV |
1106 | /** |
1107 | * DOC: implementing async commit | |
1108 | * | |
1109 | * For now the atomic helpers don't support async commit directly. If there is | |
1110 | * real need it could be added though, using the dma-buf fence infrastructure | |
1111 | * for generic synchronization with outstanding rendering. | |
1112 | * | |
1113 | * For now drivers have to implement async commit themselves, with the following | |
1114 | * sequence being the recommended one: | |
1115 | * | |
1116 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
1117 | * which commit needs to call which can fail, so we want to run it first and | |
1118 | * synchronously. | |
1119 | * | |
1120 | * 2. Synchronize with any outstanding asynchronous commit worker threads which | |
1121 | * might be affected the new state update. This can be done by either cancelling | |
1122 | * or flushing the work items, depending upon whether the driver can deal with | |
1123 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
1124 | * cleanup is still done when cancelling. | |
1125 | * | |
1126 | * For sufficient parallelism it is recommended to have a work item per crtc | |
1127 | * (for updates which don't touch global state) and a global one. Then we only | |
1128 | * need to synchronize with the crtc work items for changed crtcs and the global | |
1129 | * work item, which allows nice concurrent updates on disjoint sets of crtcs. | |
1130 | * | |
1131 | * 3. The software state is updated synchronously with | |
26196f7e | 1132 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
e8c833a7 DV |
1133 | * locks means concurrent callers never see inconsistent state. And doing this |
1134 | * while it's guaranteed that no relevant async worker runs means that async | |
1135 | * workers do not need grab any locks. Actually they must not grab locks, for | |
1136 | * otherwise the work flushing will deadlock. | |
1137 | * | |
1138 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1139 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1140 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
1141 | * being displayed. | |
1142 | */ | |
1143 | ||
c2fcd274 | 1144 | /** |
2e3afd47 | 1145 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 1146 | * @dev: DRM device |
2e3afd47 | 1147 | * @state: atomic state object with new state structures |
c2fcd274 DV |
1148 | * |
1149 | * This function prepares plane state, specifically framebuffers, for the new | |
1150 | * configuration. If any failure is encountered this function will call | |
1151 | * ->cleanup_fb on any already successfully prepared framebuffer. | |
1152 | * | |
1153 | * Returns: | |
1154 | * 0 on success, negative error code on failure. | |
1155 | */ | |
1156 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
1157 | struct drm_atomic_state *state) | |
1158 | { | |
1159 | int nplanes = dev->mode_config.num_total_plane; | |
1160 | int ret, i; | |
1161 | ||
1162 | for (i = 0; i < nplanes; i++) { | |
b5ceff20 | 1163 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1164 | struct drm_plane *plane = state->planes[i]; |
d136dfee | 1165 | struct drm_plane_state *plane_state = state->plane_states[i]; |
c2fcd274 DV |
1166 | |
1167 | if (!plane) | |
1168 | continue; | |
1169 | ||
1170 | funcs = plane->helper_private; | |
1171 | ||
844f9111 ML |
1172 | if (funcs->prepare_fb) { |
1173 | ret = funcs->prepare_fb(plane, plane_state); | |
c2fcd274 DV |
1174 | if (ret) |
1175 | goto fail; | |
1176 | } | |
1177 | } | |
1178 | ||
1179 | return 0; | |
1180 | ||
1181 | fail: | |
1182 | for (i--; i >= 0; i--) { | |
b5ceff20 | 1183 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1184 | struct drm_plane *plane = state->planes[i]; |
d136dfee | 1185 | struct drm_plane_state *plane_state = state->plane_states[i]; |
c2fcd274 DV |
1186 | |
1187 | if (!plane) | |
1188 | continue; | |
1189 | ||
1190 | funcs = plane->helper_private; | |
1191 | ||
844f9111 ML |
1192 | if (funcs->cleanup_fb) |
1193 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1194 | |
1195 | } | |
1196 | ||
1197 | return ret; | |
1198 | } | |
1199 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
1200 | ||
aef9dbb8 DV |
1201 | bool plane_crtc_active(struct drm_plane_state *state) |
1202 | { | |
1203 | return state->crtc && state->crtc->state->active; | |
1204 | } | |
1205 | ||
c2fcd274 DV |
1206 | /** |
1207 | * drm_atomic_helper_commit_planes - commit plane state | |
1208 | * @dev: DRM device | |
b0fcfc89 | 1209 | * @old_state: atomic state object with old state structures |
aef9dbb8 | 1210 | * @active_only: Only commit on active CRTC if set |
c2fcd274 DV |
1211 | * |
1212 | * This function commits the new plane state using the plane and atomic helper | |
1213 | * functions for planes and crtcs. It assumes that the atomic state has already | |
1214 | * been pushed into the relevant object state pointers, since this step can no | |
1215 | * longer fail. | |
1216 | * | |
b0fcfc89 | 1217 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 | 1218 | * crtcs need to be updated though. |
de28d021 ML |
1219 | * |
1220 | * Note that this function does all plane updates across all CRTCs in one step. | |
1221 | * If the hardware can't support this approach look at | |
1222 | * drm_atomic_helper_commit_planes_on_crtc() instead. | |
6e48ae32 DV |
1223 | * |
1224 | * Plane parameters can be updated by applications while the associated CRTC is | |
1225 | * disabled. The DRM/KMS core will store the parameters in the plane state, | |
1226 | * which will be available to the driver when the CRTC is turned on. As a result | |
1227 | * most drivers don't need to be immediately notified of plane updates for a | |
1228 | * disabled CRTC. | |
1229 | * | |
1230 | * Unless otherwise needed, drivers are advised to set the @active_only | |
1231 | * parameters to true in order not to receive plane update notifications related | |
1232 | * to a disabled CRTC. This avoids the need to manually ignore plane updates in | |
1233 | * driver code when the driver and/or hardware can't or just don't need to deal | |
1234 | * with updates on disabled CRTCs, for example when supporting runtime PM. | |
1235 | * | |
1236 | * The drm_atomic_helper_commit() default implementation only sets @active_only | |
1237 | * to false to most closely match the behaviour of the legacy helpers. This should | |
1238 | * not be copied blindly by drivers. | |
c2fcd274 DV |
1239 | */ |
1240 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
aef9dbb8 DV |
1241 | struct drm_atomic_state *old_state, |
1242 | bool active_only) | |
c2fcd274 | 1243 | { |
df63b999 ACO |
1244 | struct drm_crtc *crtc; |
1245 | struct drm_crtc_state *old_crtc_state; | |
1246 | struct drm_plane *plane; | |
1247 | struct drm_plane_state *old_plane_state; | |
c2fcd274 DV |
1248 | int i; |
1249 | ||
df63b999 | 1250 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1251 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1252 | |
1253 | funcs = crtc->helper_private; | |
1254 | ||
1255 | if (!funcs || !funcs->atomic_begin) | |
1256 | continue; | |
1257 | ||
aef9dbb8 DV |
1258 | if (active_only && !crtc->state->active) |
1259 | continue; | |
1260 | ||
613d2b27 | 1261 | funcs->atomic_begin(crtc, old_crtc_state); |
c2fcd274 DV |
1262 | } |
1263 | ||
df63b999 | 1264 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
b5ceff20 | 1265 | const struct drm_plane_helper_funcs *funcs; |
216c59d6 | 1266 | bool disabling; |
c2fcd274 DV |
1267 | |
1268 | funcs = plane->helper_private; | |
1269 | ||
3cad4b68 | 1270 | if (!funcs) |
c2fcd274 DV |
1271 | continue; |
1272 | ||
216c59d6 LP |
1273 | disabling = drm_atomic_plane_disabling(plane, old_plane_state); |
1274 | ||
1275 | if (active_only) { | |
1276 | /* | |
1277 | * Skip planes related to inactive CRTCs. If the plane | |
1278 | * is enabled use the state of the current CRTC. If the | |
1279 | * plane is being disabled use the state of the old | |
1280 | * CRTC to avoid skipping planes being disabled on an | |
1281 | * active CRTC. | |
1282 | */ | |
1283 | if (!disabling && !plane_crtc_active(plane->state)) | |
1284 | continue; | |
1285 | if (disabling && !plane_crtc_active(old_plane_state)) | |
1286 | continue; | |
1287 | } | |
aef9dbb8 | 1288 | |
407b8bd9 TR |
1289 | /* |
1290 | * Special-case disabling the plane if drivers support it. | |
1291 | */ | |
216c59d6 | 1292 | if (disabling && funcs->atomic_disable) |
407b8bd9 | 1293 | funcs->atomic_disable(plane, old_plane_state); |
216c59d6 | 1294 | else if (plane->state->crtc || disabling) |
407b8bd9 | 1295 | funcs->atomic_update(plane, old_plane_state); |
c2fcd274 DV |
1296 | } |
1297 | ||
df63b999 | 1298 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1299 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1300 | |
1301 | funcs = crtc->helper_private; | |
1302 | ||
1303 | if (!funcs || !funcs->atomic_flush) | |
1304 | continue; | |
1305 | ||
aef9dbb8 DV |
1306 | if (active_only && !crtc->state->active) |
1307 | continue; | |
1308 | ||
613d2b27 | 1309 | funcs->atomic_flush(crtc, old_crtc_state); |
c2fcd274 DV |
1310 | } |
1311 | } | |
1312 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1313 | ||
de28d021 ML |
1314 | /** |
1315 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc | |
1316 | * @old_crtc_state: atomic state object with the old crtc state | |
1317 | * | |
1318 | * This function commits the new plane state using the plane and atomic helper | |
1319 | * functions for planes on the specific crtc. It assumes that the atomic state | |
1320 | * has already been pushed into the relevant object state pointers, since this | |
1321 | * step can no longer fail. | |
1322 | * | |
1323 | * This function is useful when plane updates should be done crtc-by-crtc | |
1324 | * instead of one global step like drm_atomic_helper_commit_planes() does. | |
1325 | * | |
1326 | * This function can only be savely used when planes are not allowed to move | |
1327 | * between different CRTCs because this function doesn't handle inter-CRTC | |
1328 | * depencies. Callers need to ensure that either no such depencies exist, | |
1329 | * resolve them through ordering of commit calls or through some other means. | |
1330 | */ | |
1331 | void | |
1332 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) | |
1333 | { | |
1334 | const struct drm_crtc_helper_funcs *crtc_funcs; | |
1335 | struct drm_crtc *crtc = old_crtc_state->crtc; | |
1336 | struct drm_atomic_state *old_state = old_crtc_state->state; | |
1337 | struct drm_plane *plane; | |
1338 | unsigned plane_mask; | |
1339 | ||
1340 | plane_mask = old_crtc_state->plane_mask; | |
1341 | plane_mask |= crtc->state->plane_mask; | |
1342 | ||
1343 | crtc_funcs = crtc->helper_private; | |
1344 | if (crtc_funcs && crtc_funcs->atomic_begin) | |
613d2b27 | 1345 | crtc_funcs->atomic_begin(crtc, old_crtc_state); |
de28d021 ML |
1346 | |
1347 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { | |
1348 | struct drm_plane_state *old_plane_state = | |
1349 | drm_atomic_get_existing_plane_state(old_state, plane); | |
1350 | const struct drm_plane_helper_funcs *plane_funcs; | |
1351 | ||
1352 | plane_funcs = plane->helper_private; | |
1353 | ||
1354 | if (!old_plane_state || !plane_funcs) | |
1355 | continue; | |
1356 | ||
1357 | WARN_ON(plane->state->crtc && plane->state->crtc != crtc); | |
1358 | ||
1359 | if (drm_atomic_plane_disabling(plane, old_plane_state) && | |
1360 | plane_funcs->atomic_disable) | |
1361 | plane_funcs->atomic_disable(plane, old_plane_state); | |
1362 | else if (plane->state->crtc || | |
1363 | drm_atomic_plane_disabling(plane, old_plane_state)) | |
1364 | plane_funcs->atomic_update(plane, old_plane_state); | |
1365 | } | |
1366 | ||
1367 | if (crtc_funcs && crtc_funcs->atomic_flush) | |
613d2b27 | 1368 | crtc_funcs->atomic_flush(crtc, old_crtc_state); |
de28d021 ML |
1369 | } |
1370 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); | |
1371 | ||
6753ba97 JS |
1372 | /** |
1373 | * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes | |
1374 | * @crtc: CRTC | |
1375 | * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks | |
1376 | * | |
1377 | * Disables all planes associated with the given CRTC. This can be | |
1378 | * used for instance in the CRTC helper disable callback to disable | |
1379 | * all planes before shutting down the display pipeline. | |
1380 | * | |
1381 | * If the atomic-parameter is set the function calls the CRTC's | |
1382 | * atomic_begin hook before and atomic_flush hook after disabling the | |
1383 | * planes. | |
1384 | * | |
1385 | * It is a bug to call this function without having implemented the | |
1386 | * ->atomic_disable() plane hook. | |
1387 | */ | |
1388 | void drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc *crtc, | |
1389 | bool atomic) | |
1390 | { | |
1391 | const struct drm_crtc_helper_funcs *crtc_funcs = | |
1392 | crtc->helper_private; | |
1393 | struct drm_plane *plane; | |
1394 | ||
1395 | if (atomic && crtc_funcs && crtc_funcs->atomic_begin) | |
1396 | crtc_funcs->atomic_begin(crtc, NULL); | |
1397 | ||
1398 | drm_for_each_plane(plane, crtc->dev) { | |
1399 | const struct drm_plane_helper_funcs *plane_funcs = | |
1400 | plane->helper_private; | |
1401 | ||
1402 | if (plane->state->crtc != crtc || !plane_funcs) | |
1403 | continue; | |
1404 | ||
1405 | WARN_ON(!plane_funcs->atomic_disable); | |
1406 | if (plane_funcs->atomic_disable) | |
1407 | plane_funcs->atomic_disable(plane, NULL); | |
1408 | } | |
1409 | ||
1410 | if (atomic && crtc_funcs && crtc_funcs->atomic_flush) | |
1411 | crtc_funcs->atomic_flush(crtc, NULL); | |
1412 | } | |
1413 | EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); | |
1414 | ||
c2fcd274 DV |
1415 | /** |
1416 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1417 | * @dev: DRM device | |
1418 | * @old_state: atomic state object with old state structures | |
1419 | * | |
1420 | * This function cleans up plane state, specifically framebuffers, from the old | |
1421 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1422 | * be able to call this function. | |
1423 | * | |
1424 | * This function must also be called on the new state when the atomic update | |
1425 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1426 | */ | |
1427 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1428 | struct drm_atomic_state *old_state) | |
1429 | { | |
df63b999 ACO |
1430 | struct drm_plane *plane; |
1431 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
1432 | int i; |
1433 | ||
df63b999 | 1434 | for_each_plane_in_state(old_state, plane, plane_state, i) { |
b5ceff20 | 1435 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1436 | |
c2fcd274 DV |
1437 | funcs = plane->helper_private; |
1438 | ||
844f9111 ML |
1439 | if (funcs->cleanup_fb) |
1440 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1441 | } |
1442 | } | |
1443 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1444 | ||
1445 | /** | |
1446 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
1447 | * @dev: DRM device | |
1448 | * @state: atomic state | |
1449 | * | |
1450 | * This function stores the atomic state into the current state pointers in all | |
1451 | * driver objects. It should be called after all failing steps have been done | |
1452 | * and succeeded, but before the actual hardware state is committed. | |
1453 | * | |
1454 | * For cleanup and error recovery the current state for all changed objects will | |
1455 | * be swaped into @state. | |
1456 | * | |
1457 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1458 | * | |
1459 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1460 | * | |
1461 | * 2. Do any other steps that might fail. | |
1462 | * | |
1463 | * 3. Put the staged state into the current state pointers with this function. | |
1464 | * | |
1465 | * 4. Actually commit the hardware state. | |
1466 | * | |
26196f7e | 1467 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
c2fcd274 DV |
1468 | * contains the old state. Also do any other cleanup required with that state. |
1469 | */ | |
1470 | void drm_atomic_helper_swap_state(struct drm_device *dev, | |
1471 | struct drm_atomic_state *state) | |
1472 | { | |
1473 | int i; | |
1474 | ||
1475 | for (i = 0; i < dev->mode_config.num_connector; i++) { | |
1476 | struct drm_connector *connector = state->connectors[i]; | |
1477 | ||
1478 | if (!connector) | |
1479 | continue; | |
1480 | ||
1481 | connector->state->state = state; | |
1482 | swap(state->connector_states[i], connector->state); | |
1483 | connector->state->state = NULL; | |
1484 | } | |
1485 | ||
1486 | for (i = 0; i < dev->mode_config.num_crtc; i++) { | |
1487 | struct drm_crtc *crtc = state->crtcs[i]; | |
1488 | ||
1489 | if (!crtc) | |
1490 | continue; | |
1491 | ||
1492 | crtc->state->state = state; | |
1493 | swap(state->crtc_states[i], crtc->state); | |
1494 | crtc->state->state = NULL; | |
1495 | } | |
1496 | ||
1497 | for (i = 0; i < dev->mode_config.num_total_plane; i++) { | |
1498 | struct drm_plane *plane = state->planes[i]; | |
1499 | ||
1500 | if (!plane) | |
1501 | continue; | |
1502 | ||
1503 | plane->state->state = state; | |
1504 | swap(state->plane_states[i], plane->state); | |
1505 | plane->state->state = NULL; | |
1506 | } | |
1507 | } | |
1508 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
1509 | |
1510 | /** | |
1511 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
1512 | * @plane: plane object to update | |
1513 | * @crtc: owning CRTC of owning plane | |
1514 | * @fb: framebuffer to flip onto plane | |
1515 | * @crtc_x: x offset of primary plane on crtc | |
1516 | * @crtc_y: y offset of primary plane on crtc | |
1517 | * @crtc_w: width of primary plane rectangle on crtc | |
1518 | * @crtc_h: height of primary plane rectangle on crtc | |
1519 | * @src_x: x offset of @fb for panning | |
1520 | * @src_y: y offset of @fb for panning | |
1521 | * @src_w: width of source rectangle in @fb | |
1522 | * @src_h: height of source rectangle in @fb | |
1523 | * | |
1524 | * Provides a default plane update handler using the atomic driver interface. | |
1525 | * | |
1526 | * RETURNS: | |
1527 | * Zero on success, error code on failure | |
1528 | */ | |
1529 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
1530 | struct drm_crtc *crtc, | |
1531 | struct drm_framebuffer *fb, | |
1532 | int crtc_x, int crtc_y, | |
1533 | unsigned int crtc_w, unsigned int crtc_h, | |
1534 | uint32_t src_x, uint32_t src_y, | |
1535 | uint32_t src_w, uint32_t src_h) | |
1536 | { | |
1537 | struct drm_atomic_state *state; | |
1538 | struct drm_plane_state *plane_state; | |
1539 | int ret = 0; | |
1540 | ||
1541 | state = drm_atomic_state_alloc(plane->dev); | |
1542 | if (!state) | |
1543 | return -ENOMEM; | |
1544 | ||
1545 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1546 | retry: | |
1547 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1548 | if (IS_ERR(plane_state)) { | |
1549 | ret = PTR_ERR(plane_state); | |
1550 | goto fail; | |
1551 | } | |
1552 | ||
07cc0ef6 | 1553 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
1554 | if (ret != 0) |
1555 | goto fail; | |
321ebf04 | 1556 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
1557 | plane_state->crtc_x = crtc_x; |
1558 | plane_state->crtc_y = crtc_y; | |
042652ed | 1559 | plane_state->crtc_w = crtc_w; |
02e6f379 | 1560 | plane_state->crtc_h = crtc_h; |
042652ed DV |
1561 | plane_state->src_x = src_x; |
1562 | plane_state->src_y = src_y; | |
042652ed | 1563 | plane_state->src_w = src_w; |
02e6f379 | 1564 | plane_state->src_h = src_h; |
042652ed | 1565 | |
3671c580 DV |
1566 | if (plane == crtc->cursor) |
1567 | state->legacy_cursor_update = true; | |
1568 | ||
042652ed DV |
1569 | ret = drm_atomic_commit(state); |
1570 | if (ret != 0) | |
1571 | goto fail; | |
1572 | ||
1573 | /* Driver takes ownership of state on successful commit. */ | |
1574 | return 0; | |
1575 | fail: | |
1576 | if (ret == -EDEADLK) | |
1577 | goto backoff; | |
1578 | ||
1579 | drm_atomic_state_free(state); | |
1580 | ||
1581 | return ret; | |
1582 | backoff: | |
042652ed | 1583 | drm_atomic_state_clear(state); |
6f75cea6 | 1584 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1585 | |
1586 | /* | |
1587 | * Someone might have exchanged the framebuffer while we dropped locks | |
1588 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1589 | * core does for us. | |
1590 | */ | |
1591 | plane->old_fb = plane->fb; | |
1592 | ||
1593 | goto retry; | |
1594 | } | |
1595 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
1596 | ||
1597 | /** | |
1598 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
1599 | * @plane: plane to disable | |
1600 | * | |
1601 | * Provides a default plane disable handler using the atomic driver interface. | |
1602 | * | |
1603 | * RETURNS: | |
1604 | * Zero on success, error code on failure | |
1605 | */ | |
1606 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
1607 | { | |
1608 | struct drm_atomic_state *state; | |
1609 | struct drm_plane_state *plane_state; | |
1610 | int ret = 0; | |
1611 | ||
aa54e2ee JSP |
1612 | /* |
1613 | * FIXME: Without plane->crtc set we can't get at the implicit legacy | |
1614 | * acquire context. The real fix will be to wire the acquire ctx through | |
1615 | * everywhere we need it, but meanwhile prevent chaos by just skipping | |
1616 | * this noop. The critical case is the cursor ioctls which a) only grab | |
1617 | * crtc/cursor-plane locks (so we need the crtc to get at the right | |
1618 | * acquire context) and b) can try to disable the plane multiple times. | |
1619 | */ | |
1620 | if (!plane->crtc) | |
1621 | return 0; | |
1622 | ||
042652ed DV |
1623 | state = drm_atomic_state_alloc(plane->dev); |
1624 | if (!state) | |
1625 | return -ENOMEM; | |
1626 | ||
1627 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
1628 | retry: | |
1629 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1630 | if (IS_ERR(plane_state)) { | |
1631 | ret = PTR_ERR(plane_state); | |
1632 | goto fail; | |
1633 | } | |
1634 | ||
24e79d0d ML |
1635 | if (plane_state->crtc && (plane == plane->crtc->cursor)) |
1636 | plane_state->state->legacy_cursor_update = true; | |
1637 | ||
bbb1e524 | 1638 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
042652ed DV |
1639 | if (ret != 0) |
1640 | goto fail; | |
f02ad907 | 1641 | |
042652ed DV |
1642 | ret = drm_atomic_commit(state); |
1643 | if (ret != 0) | |
1644 | goto fail; | |
1645 | ||
1646 | /* Driver takes ownership of state on successful commit. */ | |
1647 | return 0; | |
1648 | fail: | |
1649 | if (ret == -EDEADLK) | |
1650 | goto backoff; | |
1651 | ||
1652 | drm_atomic_state_free(state); | |
1653 | ||
1654 | return ret; | |
1655 | backoff: | |
042652ed | 1656 | drm_atomic_state_clear(state); |
6f75cea6 | 1657 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1658 | |
1659 | /* | |
1660 | * Someone might have exchanged the framebuffer while we dropped locks | |
1661 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1662 | * core does for us. | |
1663 | */ | |
1664 | plane->old_fb = plane->fb; | |
1665 | ||
1666 | goto retry; | |
1667 | } | |
1668 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
1669 | ||
bbb1e524 RC |
1670 | /* just used from fb-helper and atomic-helper: */ |
1671 | int __drm_atomic_helper_disable_plane(struct drm_plane *plane, | |
1672 | struct drm_plane_state *plane_state) | |
1673 | { | |
1674 | int ret; | |
1675 | ||
1676 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
1677 | if (ret != 0) | |
1678 | return ret; | |
1679 | ||
1680 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
1681 | plane_state->crtc_x = 0; | |
1682 | plane_state->crtc_y = 0; | |
bbb1e524 | 1683 | plane_state->crtc_w = 0; |
02e6f379 | 1684 | plane_state->crtc_h = 0; |
bbb1e524 RC |
1685 | plane_state->src_x = 0; |
1686 | plane_state->src_y = 0; | |
bbb1e524 | 1687 | plane_state->src_w = 0; |
02e6f379 | 1688 | plane_state->src_h = 0; |
bbb1e524 | 1689 | |
bbb1e524 RC |
1690 | return 0; |
1691 | } | |
1692 | ||
042652ed DV |
1693 | static int update_output_state(struct drm_atomic_state *state, |
1694 | struct drm_mode_set *set) | |
1695 | { | |
1696 | struct drm_device *dev = set->crtc->dev; | |
df63b999 ACO |
1697 | struct drm_crtc *crtc; |
1698 | struct drm_crtc_state *crtc_state; | |
1699 | struct drm_connector *connector; | |
042652ed | 1700 | struct drm_connector_state *conn_state; |
042652ed DV |
1701 | int ret, i, j; |
1702 | ||
1703 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
1704 | state->acquire_ctx); | |
1705 | if (ret) | |
1706 | return ret; | |
1707 | ||
1708 | /* First grab all affected connector/crtc states. */ | |
1709 | for (i = 0; i < set->num_connectors; i++) { | |
1710 | conn_state = drm_atomic_get_connector_state(state, | |
1711 | set->connectors[i]); | |
1712 | if (IS_ERR(conn_state)) | |
1713 | return PTR_ERR(conn_state); | |
1714 | } | |
1715 | ||
df63b999 | 1716 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
1717 | ret = drm_atomic_add_affected_connectors(state, crtc); |
1718 | if (ret) | |
1719 | return ret; | |
1720 | } | |
1721 | ||
1722 | /* Then recompute connector->crtc links and crtc enabling state. */ | |
df63b999 | 1723 | for_each_connector_in_state(state, connector, conn_state, i) { |
042652ed DV |
1724 | if (conn_state->crtc == set->crtc) { |
1725 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1726 | NULL); | |
1727 | if (ret) | |
1728 | return ret; | |
1729 | } | |
1730 | ||
1731 | for (j = 0; j < set->num_connectors; j++) { | |
1732 | if (set->connectors[j] == connector) { | |
1733 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1734 | set->crtc); | |
1735 | if (ret) | |
1736 | return ret; | |
1737 | break; | |
1738 | } | |
1739 | } | |
1740 | } | |
1741 | ||
df63b999 | 1742 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
1743 | /* Don't update ->enable for the CRTC in the set_config request, |
1744 | * since a mismatch would indicate a bug in the upper layers. | |
1745 | * The actual modeset code later on will catch any | |
1746 | * inconsistencies here. */ | |
1747 | if (crtc == set->crtc) | |
1748 | continue; | |
1749 | ||
c30f55a7 LP |
1750 | if (!drm_atomic_connectors_for_crtc(state, crtc)) { |
1751 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, | |
1752 | NULL); | |
1753 | if (ret < 0) | |
1754 | return ret; | |
1755 | ||
9b5edbf7 | 1756 | crtc_state->active = false; |
c30f55a7 | 1757 | } |
042652ed DV |
1758 | } |
1759 | ||
1760 | return 0; | |
1761 | } | |
1762 | ||
1763 | /** | |
1764 | * drm_atomic_helper_set_config - set a new config from userspace | |
1765 | * @set: mode set configuration | |
1766 | * | |
1767 | * Provides a default crtc set_config handler using the atomic driver interface. | |
1768 | * | |
1769 | * Returns: | |
1770 | * Returns 0 on success, negative errno numbers on failure. | |
1771 | */ | |
1772 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
1773 | { | |
1774 | struct drm_atomic_state *state; | |
1775 | struct drm_crtc *crtc = set->crtc; | |
042652ed DV |
1776 | int ret = 0; |
1777 | ||
1778 | state = drm_atomic_state_alloc(crtc->dev); | |
1779 | if (!state) | |
1780 | return -ENOMEM; | |
1781 | ||
1782 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1783 | retry: | |
bbb1e524 RC |
1784 | ret = __drm_atomic_helper_set_config(set, state); |
1785 | if (ret != 0) | |
042652ed | 1786 | goto fail; |
042652ed | 1787 | |
bbb1e524 RC |
1788 | ret = drm_atomic_commit(state); |
1789 | if (ret != 0) | |
e5b5341c | 1790 | goto fail; |
bbb1e524 RC |
1791 | |
1792 | /* Driver takes ownership of state on successful commit. */ | |
1793 | return 0; | |
1794 | fail: | |
1795 | if (ret == -EDEADLK) | |
1796 | goto backoff; | |
1797 | ||
1798 | drm_atomic_state_free(state); | |
1799 | ||
1800 | return ret; | |
1801 | backoff: | |
1802 | drm_atomic_state_clear(state); | |
1803 | drm_atomic_legacy_backoff(state); | |
1804 | ||
1805 | /* | |
1806 | * Someone might have exchanged the framebuffer while we dropped locks | |
1807 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1808 | * core does for us. | |
1809 | */ | |
1810 | crtc->primary->old_fb = crtc->primary->fb; | |
1811 | ||
1812 | goto retry; | |
1813 | } | |
1814 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
1815 | ||
1816 | /* just used from fb-helper and atomic-helper: */ | |
1817 | int __drm_atomic_helper_set_config(struct drm_mode_set *set, | |
1818 | struct drm_atomic_state *state) | |
1819 | { | |
1820 | struct drm_crtc_state *crtc_state; | |
1821 | struct drm_plane_state *primary_state; | |
1822 | struct drm_crtc *crtc = set->crtc; | |
83926117 | 1823 | int hdisplay, vdisplay; |
bbb1e524 RC |
1824 | int ret; |
1825 | ||
1826 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1827 | if (IS_ERR(crtc_state)) | |
1828 | return PTR_ERR(crtc_state); | |
1829 | ||
1830 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); | |
1831 | if (IS_ERR(primary_state)) | |
1832 | return PTR_ERR(primary_state); | |
e5b5341c | 1833 | |
042652ed DV |
1834 | if (!set->mode) { |
1835 | WARN_ON(set->fb); | |
1836 | WARN_ON(set->num_connectors); | |
1837 | ||
819364da DS |
1838 | ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); |
1839 | if (ret != 0) | |
bbb1e524 | 1840 | return ret; |
819364da | 1841 | |
eab3bbef | 1842 | crtc_state->active = false; |
e5b5341c | 1843 | |
07cc0ef6 | 1844 | ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
e5b5341c | 1845 | if (ret != 0) |
bbb1e524 | 1846 | return ret; |
e5b5341c RC |
1847 | |
1848 | drm_atomic_set_fb_for_plane(primary_state, NULL); | |
1849 | ||
042652ed DV |
1850 | goto commit; |
1851 | } | |
1852 | ||
1853 | WARN_ON(!set->fb); | |
1854 | WARN_ON(!set->num_connectors); | |
1855 | ||
819364da DS |
1856 | ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); |
1857 | if (ret != 0) | |
bbb1e524 | 1858 | return ret; |
819364da | 1859 | |
eab3bbef | 1860 | crtc_state->active = true; |
042652ed | 1861 | |
07cc0ef6 | 1862 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
042652ed | 1863 | if (ret != 0) |
bbb1e524 RC |
1864 | return ret; |
1865 | ||
83926117 VS |
1866 | drm_crtc_get_hv_timing(set->mode, &hdisplay, &vdisplay); |
1867 | ||
321ebf04 | 1868 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
042652ed DV |
1869 | primary_state->crtc_x = 0; |
1870 | primary_state->crtc_y = 0; | |
83926117 | 1871 | primary_state->crtc_w = hdisplay; |
02e6f379 | 1872 | primary_state->crtc_h = vdisplay; |
042652ed DV |
1873 | primary_state->src_x = set->x << 16; |
1874 | primary_state->src_y = set->y << 16; | |
41121248 | 1875 | if (primary_state->rotation & (BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270))) { |
83926117 | 1876 | primary_state->src_w = vdisplay << 16; |
02e6f379 | 1877 | primary_state->src_h = hdisplay << 16; |
41121248 | 1878 | } else { |
83926117 | 1879 | primary_state->src_w = hdisplay << 16; |
02e6f379 | 1880 | primary_state->src_h = vdisplay << 16; |
41121248 | 1881 | } |
042652ed DV |
1882 | |
1883 | commit: | |
1884 | ret = update_output_state(state, set); | |
1885 | if (ret) | |
bbb1e524 | 1886 | return ret; |
042652ed | 1887 | |
042652ed | 1888 | return 0; |
042652ed | 1889 | } |
042652ed | 1890 | |
14942760 TR |
1891 | /** |
1892 | * drm_atomic_helper_disable_all - disable all currently active outputs | |
1893 | * @dev: DRM device | |
1894 | * @ctx: lock acquisition context | |
1895 | * | |
1896 | * Loops through all connectors, finding those that aren't turned off and then | |
1897 | * turns them off by setting their DPMS mode to OFF and deactivating the CRTC | |
1898 | * that they are connected to. | |
1899 | * | |
1900 | * This is used for example in suspend/resume to disable all currently active | |
1901 | * functions when suspending. | |
1902 | * | |
1903 | * Note that if callers haven't already acquired all modeset locks this might | |
1904 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
1905 | * | |
1906 | * Returns: | |
1907 | * 0 on success or a negative error code on failure. | |
1908 | * | |
1909 | * See also: | |
1910 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
1911 | */ | |
1912 | int drm_atomic_helper_disable_all(struct drm_device *dev, | |
1913 | struct drm_modeset_acquire_ctx *ctx) | |
1914 | { | |
1915 | struct drm_atomic_state *state; | |
1916 | struct drm_connector *conn; | |
1917 | int err; | |
1918 | ||
1919 | state = drm_atomic_state_alloc(dev); | |
1920 | if (!state) | |
1921 | return -ENOMEM; | |
1922 | ||
1923 | state->acquire_ctx = ctx; | |
1924 | ||
1925 | drm_for_each_connector(conn, dev) { | |
1926 | struct drm_crtc *crtc = conn->state->crtc; | |
1927 | struct drm_crtc_state *crtc_state; | |
1928 | ||
1929 | if (!crtc || conn->dpms != DRM_MODE_DPMS_ON) | |
1930 | continue; | |
1931 | ||
1932 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1933 | if (IS_ERR(crtc_state)) { | |
1934 | err = PTR_ERR(crtc_state); | |
1935 | goto free; | |
1936 | } | |
1937 | ||
1938 | crtc_state->active = false; | |
1939 | } | |
1940 | ||
1941 | err = drm_atomic_commit(state); | |
1942 | ||
1943 | free: | |
1944 | if (err < 0) | |
1945 | drm_atomic_state_free(state); | |
1946 | ||
1947 | return err; | |
1948 | } | |
1949 | EXPORT_SYMBOL(drm_atomic_helper_disable_all); | |
1950 | ||
1951 | /** | |
1952 | * drm_atomic_helper_suspend - subsystem-level suspend helper | |
1953 | * @dev: DRM device | |
1954 | * | |
1955 | * Duplicates the current atomic state, disables all active outputs and then | |
1956 | * returns a pointer to the original atomic state to the caller. Drivers can | |
1957 | * pass this pointer to the drm_atomic_helper_resume() helper upon resume to | |
1958 | * restore the output configuration that was active at the time the system | |
1959 | * entered suspend. | |
1960 | * | |
1961 | * Note that it is potentially unsafe to use this. The atomic state object | |
1962 | * returned by this function is assumed to be persistent. Drivers must ensure | |
1963 | * that this holds true. Before calling this function, drivers must make sure | |
1964 | * to suspend fbdev emulation so that nothing can be using the device. | |
1965 | * | |
1966 | * Returns: | |
1967 | * A pointer to a copy of the state before suspend on success or an ERR_PTR()- | |
1968 | * encoded error code on failure. Drivers should store the returned atomic | |
1969 | * state object and pass it to the drm_atomic_helper_resume() helper upon | |
1970 | * resume. | |
1971 | * | |
1972 | * See also: | |
1973 | * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), | |
1974 | * drm_atomic_helper_resume() | |
1975 | */ | |
1976 | struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) | |
1977 | { | |
1978 | struct drm_modeset_acquire_ctx ctx; | |
1979 | struct drm_atomic_state *state; | |
1980 | int err; | |
1981 | ||
1982 | drm_modeset_acquire_init(&ctx, 0); | |
1983 | ||
1984 | retry: | |
1985 | err = drm_modeset_lock_all_ctx(dev, &ctx); | |
1986 | if (err < 0) { | |
1987 | state = ERR_PTR(err); | |
1988 | goto unlock; | |
1989 | } | |
1990 | ||
1991 | state = drm_atomic_helper_duplicate_state(dev, &ctx); | |
1992 | if (IS_ERR(state)) | |
1993 | goto unlock; | |
1994 | ||
1995 | err = drm_atomic_helper_disable_all(dev, &ctx); | |
1996 | if (err < 0) { | |
1997 | drm_atomic_state_free(state); | |
1998 | state = ERR_PTR(err); | |
1999 | goto unlock; | |
2000 | } | |
2001 | ||
2002 | unlock: | |
2003 | if (PTR_ERR(state) == -EDEADLK) { | |
2004 | drm_modeset_backoff(&ctx); | |
2005 | goto retry; | |
2006 | } | |
2007 | ||
2008 | drm_modeset_drop_locks(&ctx); | |
2009 | drm_modeset_acquire_fini(&ctx); | |
2010 | return state; | |
2011 | } | |
2012 | EXPORT_SYMBOL(drm_atomic_helper_suspend); | |
2013 | ||
2014 | /** | |
2015 | * drm_atomic_helper_resume - subsystem-level resume helper | |
2016 | * @dev: DRM device | |
2017 | * @state: atomic state to resume to | |
2018 | * | |
2019 | * Calls drm_mode_config_reset() to synchronize hardware and software states, | |
2020 | * grabs all modeset locks and commits the atomic state object. This can be | |
2021 | * used in conjunction with the drm_atomic_helper_suspend() helper to | |
2022 | * implement suspend/resume for drivers that support atomic mode-setting. | |
2023 | * | |
2024 | * Returns: | |
2025 | * 0 on success or a negative error code on failure. | |
2026 | * | |
2027 | * See also: | |
2028 | * drm_atomic_helper_suspend() | |
2029 | */ | |
2030 | int drm_atomic_helper_resume(struct drm_device *dev, | |
2031 | struct drm_atomic_state *state) | |
2032 | { | |
2033 | struct drm_mode_config *config = &dev->mode_config; | |
2034 | int err; | |
2035 | ||
2036 | drm_mode_config_reset(dev); | |
2037 | drm_modeset_lock_all(dev); | |
2038 | state->acquire_ctx = config->acquire_ctx; | |
2039 | err = drm_atomic_commit(state); | |
2040 | drm_modeset_unlock_all(dev); | |
2041 | ||
2042 | return err; | |
2043 | } | |
2044 | EXPORT_SYMBOL(drm_atomic_helper_resume); | |
2045 | ||
042652ed | 2046 | /** |
7f50002f | 2047 | * drm_atomic_helper_crtc_set_property - helper for crtc properties |
042652ed DV |
2048 | * @crtc: DRM crtc |
2049 | * @property: DRM property | |
2050 | * @val: value of property | |
2051 | * | |
7f50002f LP |
2052 | * Provides a default crtc set_property handler using the atomic driver |
2053 | * interface. | |
042652ed DV |
2054 | * |
2055 | * RETURNS: | |
2056 | * Zero on success, error code on failure | |
2057 | */ | |
2058 | int | |
2059 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
2060 | struct drm_property *property, | |
2061 | uint64_t val) | |
2062 | { | |
2063 | struct drm_atomic_state *state; | |
2064 | struct drm_crtc_state *crtc_state; | |
2065 | int ret = 0; | |
2066 | ||
2067 | state = drm_atomic_state_alloc(crtc->dev); | |
2068 | if (!state) | |
2069 | return -ENOMEM; | |
2070 | ||
2071 | /* ->set_property is always called with all locks held. */ | |
2072 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
2073 | retry: | |
2074 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2075 | if (IS_ERR(crtc_state)) { | |
2076 | ret = PTR_ERR(crtc_state); | |
2077 | goto fail; | |
2078 | } | |
2079 | ||
40ecc694 RC |
2080 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
2081 | property, val); | |
042652ed DV |
2082 | if (ret) |
2083 | goto fail; | |
2084 | ||
2085 | ret = drm_atomic_commit(state); | |
2086 | if (ret != 0) | |
2087 | goto fail; | |
2088 | ||
2089 | /* Driver takes ownership of state on successful commit. */ | |
2090 | return 0; | |
2091 | fail: | |
2092 | if (ret == -EDEADLK) | |
2093 | goto backoff; | |
2094 | ||
2095 | drm_atomic_state_free(state); | |
2096 | ||
2097 | return ret; | |
2098 | backoff: | |
042652ed | 2099 | drm_atomic_state_clear(state); |
6f75cea6 | 2100 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2101 | |
2102 | goto retry; | |
2103 | } | |
2104 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
2105 | ||
2106 | /** | |
7f50002f | 2107 | * drm_atomic_helper_plane_set_property - helper for plane properties |
042652ed DV |
2108 | * @plane: DRM plane |
2109 | * @property: DRM property | |
2110 | * @val: value of property | |
2111 | * | |
7f50002f LP |
2112 | * Provides a default plane set_property handler using the atomic driver |
2113 | * interface. | |
042652ed DV |
2114 | * |
2115 | * RETURNS: | |
2116 | * Zero on success, error code on failure | |
2117 | */ | |
2118 | int | |
2119 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
2120 | struct drm_property *property, | |
2121 | uint64_t val) | |
2122 | { | |
2123 | struct drm_atomic_state *state; | |
2124 | struct drm_plane_state *plane_state; | |
2125 | int ret = 0; | |
2126 | ||
2127 | state = drm_atomic_state_alloc(plane->dev); | |
2128 | if (!state) | |
2129 | return -ENOMEM; | |
2130 | ||
2131 | /* ->set_property is always called with all locks held. */ | |
2132 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
2133 | retry: | |
2134 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2135 | if (IS_ERR(plane_state)) { | |
2136 | ret = PTR_ERR(plane_state); | |
2137 | goto fail; | |
2138 | } | |
2139 | ||
40ecc694 RC |
2140 | ret = drm_atomic_plane_set_property(plane, plane_state, |
2141 | property, val); | |
042652ed DV |
2142 | if (ret) |
2143 | goto fail; | |
2144 | ||
2145 | ret = drm_atomic_commit(state); | |
2146 | if (ret != 0) | |
2147 | goto fail; | |
2148 | ||
2149 | /* Driver takes ownership of state on successful commit. */ | |
2150 | return 0; | |
2151 | fail: | |
2152 | if (ret == -EDEADLK) | |
2153 | goto backoff; | |
2154 | ||
2155 | drm_atomic_state_free(state); | |
2156 | ||
2157 | return ret; | |
2158 | backoff: | |
042652ed | 2159 | drm_atomic_state_clear(state); |
6f75cea6 | 2160 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2161 | |
2162 | goto retry; | |
2163 | } | |
2164 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
2165 | ||
2166 | /** | |
7f50002f | 2167 | * drm_atomic_helper_connector_set_property - helper for connector properties |
042652ed DV |
2168 | * @connector: DRM connector |
2169 | * @property: DRM property | |
2170 | * @val: value of property | |
2171 | * | |
7f50002f LP |
2172 | * Provides a default connector set_property handler using the atomic driver |
2173 | * interface. | |
042652ed DV |
2174 | * |
2175 | * RETURNS: | |
2176 | * Zero on success, error code on failure | |
2177 | */ | |
2178 | int | |
2179 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
2180 | struct drm_property *property, | |
2181 | uint64_t val) | |
2182 | { | |
2183 | struct drm_atomic_state *state; | |
2184 | struct drm_connector_state *connector_state; | |
2185 | int ret = 0; | |
2186 | ||
2187 | state = drm_atomic_state_alloc(connector->dev); | |
2188 | if (!state) | |
2189 | return -ENOMEM; | |
2190 | ||
2191 | /* ->set_property is always called with all locks held. */ | |
2192 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
2193 | retry: | |
2194 | connector_state = drm_atomic_get_connector_state(state, connector); | |
2195 | if (IS_ERR(connector_state)) { | |
2196 | ret = PTR_ERR(connector_state); | |
2197 | goto fail; | |
2198 | } | |
2199 | ||
40ecc694 RC |
2200 | ret = drm_atomic_connector_set_property(connector, connector_state, |
2201 | property, val); | |
042652ed DV |
2202 | if (ret) |
2203 | goto fail; | |
2204 | ||
2205 | ret = drm_atomic_commit(state); | |
2206 | if (ret != 0) | |
2207 | goto fail; | |
2208 | ||
2209 | /* Driver takes ownership of state on successful commit. */ | |
2210 | return 0; | |
2211 | fail: | |
2212 | if (ret == -EDEADLK) | |
2213 | goto backoff; | |
2214 | ||
2215 | drm_atomic_state_free(state); | |
2216 | ||
2217 | return ret; | |
2218 | backoff: | |
042652ed | 2219 | drm_atomic_state_clear(state); |
6f75cea6 | 2220 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2221 | |
2222 | goto retry; | |
2223 | } | |
2224 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 DV |
2225 | |
2226 | /** | |
2227 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
2228 | * @crtc: DRM crtc | |
2229 | * @fb: DRM framebuffer | |
2230 | * @event: optional DRM event to signal upon completion | |
2231 | * @flags: flip flags for non-vblank sync'ed updates | |
2232 | * | |
2233 | * Provides a default page flip implementation using the atomic driver interface. | |
2234 | * | |
2235 | * Note that for now so called async page flips (i.e. updates which are not | |
2236 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
2237 | * no provisions for this yet. | |
2238 | * | |
2239 | * Returns: | |
2240 | * Returns 0 on success, negative errno numbers on failure. | |
2241 | */ | |
2242 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
2243 | struct drm_framebuffer *fb, | |
2244 | struct drm_pending_vblank_event *event, | |
2245 | uint32_t flags) | |
2246 | { | |
2247 | struct drm_plane *plane = crtc->primary; | |
2248 | struct drm_atomic_state *state; | |
2249 | struct drm_plane_state *plane_state; | |
2250 | struct drm_crtc_state *crtc_state; | |
2251 | int ret = 0; | |
2252 | ||
2253 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
2254 | return -EINVAL; | |
2255 | ||
2256 | state = drm_atomic_state_alloc(plane->dev); | |
2257 | if (!state) | |
2258 | return -ENOMEM; | |
2259 | ||
2260 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2261 | retry: | |
2262 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2263 | if (IS_ERR(crtc_state)) { | |
2264 | ret = PTR_ERR(crtc_state); | |
2265 | goto fail; | |
2266 | } | |
2267 | crtc_state->event = event; | |
2268 | ||
2269 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2270 | if (IS_ERR(plane_state)) { | |
2271 | ret = PTR_ERR(plane_state); | |
2272 | goto fail; | |
2273 | } | |
2274 | ||
07cc0ef6 | 2275 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
8bc0f312 DV |
2276 | if (ret != 0) |
2277 | goto fail; | |
321ebf04 | 2278 | drm_atomic_set_fb_for_plane(plane_state, fb); |
8bc0f312 DV |
2279 | |
2280 | ret = drm_atomic_async_commit(state); | |
2281 | if (ret != 0) | |
2282 | goto fail; | |
2283 | ||
8bc0f312 DV |
2284 | /* Driver takes ownership of state on successful async commit. */ |
2285 | return 0; | |
2286 | fail: | |
2287 | if (ret == -EDEADLK) | |
2288 | goto backoff; | |
2289 | ||
2290 | drm_atomic_state_free(state); | |
2291 | ||
2292 | return ret; | |
2293 | backoff: | |
8bc0f312 | 2294 | drm_atomic_state_clear(state); |
6f75cea6 | 2295 | drm_atomic_legacy_backoff(state); |
8bc0f312 DV |
2296 | |
2297 | /* | |
2298 | * Someone might have exchanged the framebuffer while we dropped locks | |
2299 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2300 | * core does for us. | |
2301 | */ | |
2302 | plane->old_fb = plane->fb; | |
2303 | ||
2304 | goto retry; | |
2305 | } | |
2306 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
d461701c | 2307 | |
b486e0e6 DV |
2308 | /** |
2309 | * drm_atomic_helper_connector_dpms() - connector dpms helper implementation | |
2310 | * @connector: affected connector | |
2311 | * @mode: DPMS mode | |
2312 | * | |
2313 | * This is the main helper function provided by the atomic helper framework for | |
2314 | * implementing the legacy DPMS connector interface. It computes the new desired | |
2315 | * ->active state for the corresponding CRTC (if the connector is enabled) and | |
2316 | * updates it. | |
9a69a9ac ML |
2317 | * |
2318 | * Returns: | |
2319 | * Returns 0 on success, negative errno numbers on failure. | |
b486e0e6 | 2320 | */ |
9a69a9ac ML |
2321 | int drm_atomic_helper_connector_dpms(struct drm_connector *connector, |
2322 | int mode) | |
b486e0e6 DV |
2323 | { |
2324 | struct drm_mode_config *config = &connector->dev->mode_config; | |
2325 | struct drm_atomic_state *state; | |
2326 | struct drm_crtc_state *crtc_state; | |
2327 | struct drm_crtc *crtc; | |
2328 | struct drm_connector *tmp_connector; | |
2329 | int ret; | |
2330 | bool active = false; | |
9a69a9ac | 2331 | int old_mode = connector->dpms; |
b486e0e6 DV |
2332 | |
2333 | if (mode != DRM_MODE_DPMS_ON) | |
2334 | mode = DRM_MODE_DPMS_OFF; | |
2335 | ||
2336 | connector->dpms = mode; | |
2337 | crtc = connector->state->crtc; | |
2338 | ||
2339 | if (!crtc) | |
9a69a9ac | 2340 | return 0; |
b486e0e6 | 2341 | |
b486e0e6 DV |
2342 | state = drm_atomic_state_alloc(connector->dev); |
2343 | if (!state) | |
9a69a9ac | 2344 | return -ENOMEM; |
b486e0e6 DV |
2345 | |
2346 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2347 | retry: | |
2348 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
9a69a9ac ML |
2349 | if (IS_ERR(crtc_state)) { |
2350 | ret = PTR_ERR(crtc_state); | |
2351 | goto fail; | |
2352 | } | |
b486e0e6 DV |
2353 | |
2354 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
2355 | ||
9a9f5ce8 | 2356 | drm_for_each_connector(tmp_connector, connector->dev) { |
0388df05 | 2357 | if (tmp_connector->state->crtc != crtc) |
b486e0e6 DV |
2358 | continue; |
2359 | ||
0388df05 | 2360 | if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { |
b486e0e6 DV |
2361 | active = true; |
2362 | break; | |
2363 | } | |
2364 | } | |
2365 | crtc_state->active = active; | |
2366 | ||
2367 | ret = drm_atomic_commit(state); | |
2368 | if (ret != 0) | |
2369 | goto fail; | |
2370 | ||
9a69a9ac ML |
2371 | /* Driver takes ownership of state on successful commit. */ |
2372 | return 0; | |
b486e0e6 DV |
2373 | fail: |
2374 | if (ret == -EDEADLK) | |
2375 | goto backoff; | |
2376 | ||
9a69a9ac | 2377 | connector->dpms = old_mode; |
b486e0e6 DV |
2378 | drm_atomic_state_free(state); |
2379 | ||
9a69a9ac | 2380 | return ret; |
b486e0e6 DV |
2381 | backoff: |
2382 | drm_atomic_state_clear(state); | |
2383 | drm_atomic_legacy_backoff(state); | |
2384 | ||
2385 | goto retry; | |
2386 | } | |
2387 | EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); | |
2388 | ||
3150c7d0 DV |
2389 | /** |
2390 | * DOC: atomic state reset and initialization | |
2391 | * | |
2392 | * Both the drm core and the atomic helpers assume that there is always the full | |
2393 | * and correct atomic software state for all connectors, CRTCs and planes | |
2394 | * available. Which is a bit a problem on driver load and also after system | |
2395 | * suspend. One way to solve this is to have a hardware state read-out | |
2396 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
2397 | * driver). | |
2398 | * | |
2399 | * The simpler solution is to just reset the software state to everything off, | |
2400 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
2401 | * the atomic helpers provide default reset implementations for all hooks. | |
2402 | */ | |
2403 | ||
d461701c DV |
2404 | /** |
2405 | * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs | |
2406 | * @crtc: drm CRTC | |
2407 | * | |
2408 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
2409 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2410 | */ | |
2411 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
2412 | { | |
5f911905 | 2413 | if (crtc->state) |
99cf4a29 | 2414 | drm_property_unreference_blob(crtc->state->mode_blob); |
d461701c DV |
2415 | kfree(crtc->state); |
2416 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
07cc0ef6 DV |
2417 | |
2418 | if (crtc->state) | |
2419 | crtc->state->crtc = crtc; | |
d461701c DV |
2420 | } |
2421 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
2422 | ||
f5e7840b TR |
2423 | /** |
2424 | * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state | |
2425 | * @crtc: CRTC object | |
2426 | * @state: atomic CRTC state | |
2427 | * | |
2428 | * Copies atomic state from a CRTC's current state and resets inferred values. | |
2429 | * This is useful for drivers that subclass the CRTC state. | |
2430 | */ | |
2431 | void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc, | |
2432 | struct drm_crtc_state *state) | |
2433 | { | |
2434 | memcpy(state, crtc->state, sizeof(*state)); | |
2435 | ||
99cf4a29 DS |
2436 | if (state->mode_blob) |
2437 | drm_property_reference_blob(state->mode_blob); | |
f5e7840b TR |
2438 | state->mode_changed = false; |
2439 | state->active_changed = false; | |
2440 | state->planes_changed = false; | |
fc596660 | 2441 | state->connectors_changed = false; |
f5e7840b TR |
2442 | state->event = NULL; |
2443 | } | |
2444 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state); | |
2445 | ||
d461701c DV |
2446 | /** |
2447 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
2448 | * @crtc: drm CRTC | |
2449 | * | |
2450 | * Default CRTC state duplicate hook for drivers which don't have their own | |
2451 | * subclassed CRTC state structure. | |
2452 | */ | |
2453 | struct drm_crtc_state * | |
2454 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
2455 | { | |
2456 | struct drm_crtc_state *state; | |
2457 | ||
2458 | if (WARN_ON(!crtc->state)) | |
2459 | return NULL; | |
2460 | ||
f5e7840b TR |
2461 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2462 | if (state) | |
2463 | __drm_atomic_helper_crtc_duplicate_state(crtc, state); | |
d461701c DV |
2464 | |
2465 | return state; | |
2466 | } | |
2467 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
2468 | ||
f5e7840b TR |
2469 | /** |
2470 | * __drm_atomic_helper_crtc_destroy_state - release CRTC state | |
2471 | * @crtc: CRTC object | |
2472 | * @state: CRTC state object to release | |
2473 | * | |
2474 | * Releases all resources stored in the CRTC state without actually freeing | |
2475 | * the memory of the CRTC state. This is useful for drivers that subclass the | |
2476 | * CRTC state. | |
2477 | */ | |
2478 | void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
2479 | struct drm_crtc_state *state) | |
2480 | { | |
5f911905 | 2481 | drm_property_unreference_blob(state->mode_blob); |
f5e7840b TR |
2482 | } |
2483 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); | |
2484 | ||
d461701c DV |
2485 | /** |
2486 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
2487 | * @crtc: drm CRTC | |
2488 | * @state: CRTC state object to release | |
2489 | * | |
2490 | * Default CRTC state destroy hook for drivers which don't have their own | |
2491 | * subclassed CRTC state structure. | |
2492 | */ | |
2493 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
2494 | struct drm_crtc_state *state) | |
2495 | { | |
f5e7840b | 2496 | __drm_atomic_helper_crtc_destroy_state(crtc, state); |
d461701c DV |
2497 | kfree(state); |
2498 | } | |
2499 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
2500 | ||
2501 | /** | |
2502 | * drm_atomic_helper_plane_reset - default ->reset hook for planes | |
2503 | * @plane: drm plane | |
2504 | * | |
2505 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
2506 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2507 | */ | |
2508 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
2509 | { | |
321ebf04 DV |
2510 | if (plane->state && plane->state->fb) |
2511 | drm_framebuffer_unreference(plane->state->fb); | |
2512 | ||
d461701c DV |
2513 | kfree(plane->state); |
2514 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
07cc0ef6 DV |
2515 | |
2516 | if (plane->state) | |
2517 | plane->state->plane = plane; | |
d461701c DV |
2518 | } |
2519 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
2520 | ||
f5e7840b TR |
2521 | /** |
2522 | * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state | |
2523 | * @plane: plane object | |
2524 | * @state: atomic plane state | |
2525 | * | |
2526 | * Copies atomic state from a plane's current state. This is useful for | |
2527 | * drivers that subclass the plane state. | |
2528 | */ | |
2529 | void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane, | |
2530 | struct drm_plane_state *state) | |
2531 | { | |
2532 | memcpy(state, plane->state, sizeof(*state)); | |
2533 | ||
2534 | if (state->fb) | |
2535 | drm_framebuffer_reference(state->fb); | |
2536 | } | |
2537 | EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state); | |
2538 | ||
d461701c DV |
2539 | /** |
2540 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
2541 | * @plane: drm plane | |
2542 | * | |
2543 | * Default plane state duplicate hook for drivers which don't have their own | |
2544 | * subclassed plane state structure. | |
2545 | */ | |
2546 | struct drm_plane_state * | |
2547 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
2548 | { | |
321ebf04 DV |
2549 | struct drm_plane_state *state; |
2550 | ||
d461701c DV |
2551 | if (WARN_ON(!plane->state)) |
2552 | return NULL; | |
2553 | ||
f5e7840b TR |
2554 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2555 | if (state) | |
2556 | __drm_atomic_helper_plane_duplicate_state(plane, state); | |
321ebf04 DV |
2557 | |
2558 | return state; | |
d461701c DV |
2559 | } |
2560 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
2561 | ||
f5e7840b TR |
2562 | /** |
2563 | * __drm_atomic_helper_plane_destroy_state - release plane state | |
2564 | * @plane: plane object | |
2565 | * @state: plane state object to release | |
2566 | * | |
2567 | * Releases all resources stored in the plane state without actually freeing | |
2568 | * the memory of the plane state. This is useful for drivers that subclass the | |
2569 | * plane state. | |
2570 | */ | |
2571 | void __drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
2572 | struct drm_plane_state *state) | |
2573 | { | |
2574 | if (state->fb) | |
2575 | drm_framebuffer_unreference(state->fb); | |
2576 | } | |
2577 | EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state); | |
2578 | ||
d461701c DV |
2579 | /** |
2580 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
2581 | * @plane: drm plane | |
2582 | * @state: plane state object to release | |
2583 | * | |
2584 | * Default plane state destroy hook for drivers which don't have their own | |
2585 | * subclassed plane state structure. | |
2586 | */ | |
2587 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
321ebf04 | 2588 | struct drm_plane_state *state) |
d461701c | 2589 | { |
f5e7840b | 2590 | __drm_atomic_helper_plane_destroy_state(plane, state); |
d461701c DV |
2591 | kfree(state); |
2592 | } | |
2593 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
2594 | ||
2595 | /** | |
2596 | * drm_atomic_helper_connector_reset - default ->reset hook for connectors | |
2597 | * @connector: drm connector | |
2598 | * | |
2599 | * Resets the atomic state for @connector by freeing the state pointer (which | |
2600 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
2601 | * object. | |
2602 | */ | |
2603 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
2604 | { | |
2605 | kfree(connector->state); | |
2606 | connector->state = kzalloc(sizeof(*connector->state), GFP_KERNEL); | |
07cc0ef6 DV |
2607 | |
2608 | if (connector->state) | |
2609 | connector->state->connector = connector; | |
d461701c DV |
2610 | } |
2611 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
2612 | ||
f5e7840b TR |
2613 | /** |
2614 | * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state | |
2615 | * @connector: connector object | |
2616 | * @state: atomic connector state | |
2617 | * | |
2618 | * Copies atomic state from a connector's current state. This is useful for | |
2619 | * drivers that subclass the connector state. | |
2620 | */ | |
2621 | void | |
2622 | __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector, | |
2623 | struct drm_connector_state *state) | |
2624 | { | |
2625 | memcpy(state, connector->state, sizeof(*state)); | |
2626 | } | |
2627 | EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state); | |
2628 | ||
d461701c DV |
2629 | /** |
2630 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
2631 | * @connector: drm connector | |
2632 | * | |
2633 | * Default connector state duplicate hook for drivers which don't have their own | |
2634 | * subclassed connector state structure. | |
2635 | */ | |
2636 | struct drm_connector_state * | |
2637 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
2638 | { | |
f5e7840b TR |
2639 | struct drm_connector_state *state; |
2640 | ||
d461701c DV |
2641 | if (WARN_ON(!connector->state)) |
2642 | return NULL; | |
2643 | ||
f5e7840b TR |
2644 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2645 | if (state) | |
2646 | __drm_atomic_helper_connector_duplicate_state(connector, state); | |
2647 | ||
2648 | return state; | |
d461701c DV |
2649 | } |
2650 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
2651 | ||
397fd77c TR |
2652 | /** |
2653 | * drm_atomic_helper_duplicate_state - duplicate an atomic state object | |
2654 | * @dev: DRM device | |
2655 | * @ctx: lock acquisition context | |
2656 | * | |
2657 | * Makes a copy of the current atomic state by looping over all objects and | |
14942760 TR |
2658 | * duplicating their respective states. This is used for example by suspend/ |
2659 | * resume support code to save the state prior to suspend such that it can | |
2660 | * be restored upon resume. | |
397fd77c TR |
2661 | * |
2662 | * Note that this treats atomic state as persistent between save and restore. | |
2663 | * Drivers must make sure that this is possible and won't result in confusion | |
2664 | * or erroneous behaviour. | |
2665 | * | |
2666 | * Note that if callers haven't already acquired all modeset locks this might | |
2667 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
2668 | * | |
2669 | * Returns: | |
2670 | * A pointer to the copy of the atomic state object on success or an | |
2671 | * ERR_PTR()-encoded error code on failure. | |
14942760 TR |
2672 | * |
2673 | * See also: | |
2674 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
397fd77c TR |
2675 | */ |
2676 | struct drm_atomic_state * | |
2677 | drm_atomic_helper_duplicate_state(struct drm_device *dev, | |
2678 | struct drm_modeset_acquire_ctx *ctx) | |
2679 | { | |
2680 | struct drm_atomic_state *state; | |
2681 | struct drm_connector *conn; | |
2682 | struct drm_plane *plane; | |
2683 | struct drm_crtc *crtc; | |
2684 | int err = 0; | |
2685 | ||
2686 | state = drm_atomic_state_alloc(dev); | |
2687 | if (!state) | |
2688 | return ERR_PTR(-ENOMEM); | |
2689 | ||
2690 | state->acquire_ctx = ctx; | |
2691 | ||
2692 | drm_for_each_crtc(crtc, dev) { | |
2693 | struct drm_crtc_state *crtc_state; | |
2694 | ||
2695 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2696 | if (IS_ERR(crtc_state)) { | |
2697 | err = PTR_ERR(crtc_state); | |
2698 | goto free; | |
2699 | } | |
2700 | } | |
2701 | ||
2702 | drm_for_each_plane(plane, dev) { | |
2703 | struct drm_plane_state *plane_state; | |
2704 | ||
2705 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2706 | if (IS_ERR(plane_state)) { | |
2707 | err = PTR_ERR(plane_state); | |
2708 | goto free; | |
2709 | } | |
2710 | } | |
2711 | ||
2712 | drm_for_each_connector(conn, dev) { | |
2713 | struct drm_connector_state *conn_state; | |
2714 | ||
2715 | conn_state = drm_atomic_get_connector_state(state, conn); | |
2716 | if (IS_ERR(conn_state)) { | |
2717 | err = PTR_ERR(conn_state); | |
2718 | goto free; | |
2719 | } | |
2720 | } | |
2721 | ||
2722 | /* clear the acquire context so that it isn't accidentally reused */ | |
2723 | state->acquire_ctx = NULL; | |
2724 | ||
2725 | free: | |
2726 | if (err < 0) { | |
2727 | drm_atomic_state_free(state); | |
2728 | state = ERR_PTR(err); | |
2729 | } | |
2730 | ||
2731 | return state; | |
2732 | } | |
2733 | EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); | |
2734 | ||
f5e7840b TR |
2735 | /** |
2736 | * __drm_atomic_helper_connector_destroy_state - release connector state | |
2737 | * @connector: connector object | |
2738 | * @state: connector state object to release | |
2739 | * | |
2740 | * Releases all resources stored in the connector state without actually | |
2741 | * freeing the memory of the connector state. This is useful for drivers that | |
2742 | * subclass the connector state. | |
2743 | */ | |
2744 | void | |
2745 | __drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
2746 | struct drm_connector_state *state) | |
2747 | { | |
2748 | /* | |
2749 | * This is currently a placeholder so that drivers that subclass the | |
2750 | * state will automatically do the right thing if code is ever added | |
2751 | * to this function. | |
2752 | */ | |
2753 | } | |
2754 | EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state); | |
2755 | ||
d461701c DV |
2756 | /** |
2757 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
2758 | * @connector: drm connector | |
2759 | * @state: connector state object to release | |
2760 | * | |
2761 | * Default connector state destroy hook for drivers which don't have their own | |
2762 | * subclassed connector state structure. | |
2763 | */ | |
2764 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
2765 | struct drm_connector_state *state) | |
2766 | { | |
f5e7840b | 2767 | __drm_atomic_helper_connector_destroy_state(connector, state); |
d461701c DV |
2768 | kfree(state); |
2769 | } | |
2770 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); |