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c2fcd274 DV |
1 | /* |
2 | * Copyright (C) 2014 Red Hat | |
3 | * Copyright (C) 2014 Intel Corp. | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a | |
6 | * copy of this software and associated documentation files (the "Software"), | |
7 | * to deal in the Software without restriction, including without limitation | |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | * and/or sell copies of the Software, and to permit persons to whom the | |
10 | * Software is furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
21 | * OTHER DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Rob Clark <robdclark@gmail.com> | |
25 | * Daniel Vetter <daniel.vetter@ffwll.ch> | |
26 | */ | |
27 | ||
28 | #include <drm/drmP.h> | |
29 | #include <drm/drm_atomic.h> | |
30 | #include <drm/drm_plane_helper.h> | |
31 | #include <drm/drm_crtc_helper.h> | |
623369e5 | 32 | #include <drm/drm_atomic_helper.h> |
e2330f07 | 33 | #include <linux/fence.h> |
c2fcd274 | 34 | |
3150c7d0 DV |
35 | /** |
36 | * DOC: overview | |
37 | * | |
38 | * This helper library provides implementations of check and commit functions on | |
39 | * top of the CRTC modeset helper callbacks and the plane helper callbacks. It | |
40 | * also provides convenience implementations for the atomic state handling | |
41 | * callbacks for drivers which don't need to subclass the drm core structures to | |
42 | * add their own additional internal state. | |
43 | * | |
44 | * This library also provides default implementations for the check callback in | |
45 | * drm_atomic_helper_check and for the commit callback with | |
46 | * drm_atomic_helper_commit. But the individual stages and callbacks are expose | |
47 | * to allow drivers to mix and match and e.g. use the plane helpers only | |
48 | * together with a driver private modeset implementation. | |
49 | * | |
50 | * This library also provides implementations for all the legacy driver | |
51 | * interfaces on top of the atomic interface. See drm_atomic_helper_set_config, | |
52 | * drm_atomic_helper_disable_plane, drm_atomic_helper_disable_plane and the | |
53 | * various functions to implement set_property callbacks. New drivers must not | |
54 | * implement these functions themselves but must use the provided helpers. | |
55 | */ | |
c2fcd274 DV |
56 | static void |
57 | drm_atomic_helper_plane_changed(struct drm_atomic_state *state, | |
58 | struct drm_plane_state *plane_state, | |
59 | struct drm_plane *plane) | |
60 | { | |
61 | struct drm_crtc_state *crtc_state; | |
62 | ||
63 | if (plane->state->crtc) { | |
4b08eae5 | 64 | crtc_state = state->crtc_states[drm_crtc_index(plane->state->crtc)]; |
c2fcd274 DV |
65 | |
66 | if (WARN_ON(!crtc_state)) | |
67 | return; | |
68 | ||
69 | crtc_state->planes_changed = true; | |
70 | } | |
71 | ||
72 | if (plane_state->crtc) { | |
73 | crtc_state = | |
74 | state->crtc_states[drm_crtc_index(plane_state->crtc)]; | |
75 | ||
76 | if (WARN_ON(!crtc_state)) | |
77 | return; | |
78 | ||
79 | crtc_state->planes_changed = true; | |
80 | } | |
81 | } | |
82 | ||
623369e5 DV |
83 | static struct drm_crtc * |
84 | get_current_crtc_for_encoder(struct drm_device *dev, | |
85 | struct drm_encoder *encoder) | |
86 | { | |
87 | struct drm_mode_config *config = &dev->mode_config; | |
88 | struct drm_connector *connector; | |
89 | ||
90 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
91 | ||
92 | list_for_each_entry(connector, &config->connector_list, head) { | |
93 | if (connector->state->best_encoder != encoder) | |
94 | continue; | |
95 | ||
96 | return connector->state->crtc; | |
97 | } | |
98 | ||
99 | return NULL; | |
100 | } | |
101 | ||
102 | static int | |
103 | steal_encoder(struct drm_atomic_state *state, | |
104 | struct drm_encoder *encoder, | |
105 | struct drm_crtc *encoder_crtc) | |
106 | { | |
107 | struct drm_mode_config *config = &state->dev->mode_config; | |
108 | struct drm_crtc_state *crtc_state; | |
109 | struct drm_connector *connector; | |
110 | struct drm_connector_state *connector_state; | |
042652ed | 111 | int ret; |
623369e5 DV |
112 | |
113 | /* | |
114 | * We can only steal an encoder coming from a connector, which means we | |
115 | * must already hold the connection_mutex. | |
116 | */ | |
117 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
118 | ||
17a38d9c DV |
119 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d], stealing it\n", |
120 | encoder->base.id, encoder->name, | |
121 | encoder_crtc->base.id); | |
623369e5 DV |
122 | |
123 | crtc_state = drm_atomic_get_crtc_state(state, encoder_crtc); | |
124 | if (IS_ERR(crtc_state)) | |
125 | return PTR_ERR(crtc_state); | |
126 | ||
127 | crtc_state->mode_changed = true; | |
128 | ||
129 | list_for_each_entry(connector, &config->connector_list, head) { | |
130 | if (connector->state->best_encoder != encoder) | |
131 | continue; | |
132 | ||
17a38d9c DV |
133 | DRM_DEBUG_ATOMIC("Stealing encoder from [CONNECTOR:%d:%s]\n", |
134 | connector->base.id, | |
135 | connector->name); | |
623369e5 DV |
136 | |
137 | connector_state = drm_atomic_get_connector_state(state, | |
138 | connector); | |
139 | if (IS_ERR(connector_state)) | |
140 | return PTR_ERR(connector_state); | |
141 | ||
042652ed DV |
142 | ret = drm_atomic_set_crtc_for_connector(connector_state, NULL); |
143 | if (ret) | |
144 | return ret; | |
623369e5 DV |
145 | connector_state->best_encoder = NULL; |
146 | } | |
147 | ||
148 | return 0; | |
149 | } | |
150 | ||
151 | static int | |
152 | update_connector_routing(struct drm_atomic_state *state, int conn_idx) | |
153 | { | |
b5ceff20 | 154 | const struct drm_connector_helper_funcs *funcs; |
623369e5 DV |
155 | struct drm_encoder *new_encoder; |
156 | struct drm_crtc *encoder_crtc; | |
157 | struct drm_connector *connector; | |
158 | struct drm_connector_state *connector_state; | |
159 | struct drm_crtc_state *crtc_state; | |
160 | int idx, ret; | |
161 | ||
162 | connector = state->connectors[conn_idx]; | |
163 | connector_state = state->connector_states[conn_idx]; | |
164 | ||
165 | if (!connector) | |
166 | return 0; | |
167 | ||
17a38d9c DV |
168 | DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n", |
169 | connector->base.id, | |
170 | connector->name); | |
623369e5 DV |
171 | |
172 | if (connector->state->crtc != connector_state->crtc) { | |
173 | if (connector->state->crtc) { | |
174 | idx = drm_crtc_index(connector->state->crtc); | |
175 | ||
176 | crtc_state = state->crtc_states[idx]; | |
177 | crtc_state->mode_changed = true; | |
178 | } | |
179 | ||
180 | if (connector_state->crtc) { | |
181 | idx = drm_crtc_index(connector_state->crtc); | |
182 | ||
183 | crtc_state = state->crtc_states[idx]; | |
184 | crtc_state->mode_changed = true; | |
185 | } | |
186 | } | |
187 | ||
188 | if (!connector_state->crtc) { | |
17a38d9c | 189 | DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n", |
623369e5 DV |
190 | connector->base.id, |
191 | connector->name); | |
192 | ||
193 | connector_state->best_encoder = NULL; | |
194 | ||
195 | return 0; | |
196 | } | |
197 | ||
198 | funcs = connector->helper_private; | |
199 | new_encoder = funcs->best_encoder(connector); | |
200 | ||
201 | if (!new_encoder) { | |
17a38d9c DV |
202 | DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", |
203 | connector->base.id, | |
204 | connector->name); | |
623369e5 DV |
205 | return -EINVAL; |
206 | } | |
207 | ||
208 | if (new_encoder == connector_state->best_encoder) { | |
17a38d9c DV |
209 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d]\n", |
210 | connector->base.id, | |
211 | connector->name, | |
212 | new_encoder->base.id, | |
213 | new_encoder->name, | |
214 | connector_state->crtc->base.id); | |
623369e5 DV |
215 | |
216 | return 0; | |
217 | } | |
218 | ||
219 | encoder_crtc = get_current_crtc_for_encoder(state->dev, | |
220 | new_encoder); | |
221 | ||
222 | if (encoder_crtc) { | |
223 | ret = steal_encoder(state, new_encoder, encoder_crtc); | |
224 | if (ret) { | |
17a38d9c DV |
225 | DRM_DEBUG_ATOMIC("Encoder stealing failed for [CONNECTOR:%d:%s]\n", |
226 | connector->base.id, | |
227 | connector->name); | |
623369e5 DV |
228 | return ret; |
229 | } | |
230 | } | |
231 | ||
232 | connector_state->best_encoder = new_encoder; | |
233 | idx = drm_crtc_index(connector_state->crtc); | |
234 | ||
235 | crtc_state = state->crtc_states[idx]; | |
236 | crtc_state->mode_changed = true; | |
237 | ||
17a38d9c DV |
238 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d]\n", |
239 | connector->base.id, | |
240 | connector->name, | |
241 | new_encoder->base.id, | |
242 | new_encoder->name, | |
243 | connector_state->crtc->base.id); | |
623369e5 DV |
244 | |
245 | return 0; | |
246 | } | |
247 | ||
248 | static int | |
249 | mode_fixup(struct drm_atomic_state *state) | |
250 | { | |
df63b999 | 251 | struct drm_crtc *crtc; |
623369e5 | 252 | struct drm_crtc_state *crtc_state; |
df63b999 | 253 | struct drm_connector *connector; |
623369e5 DV |
254 | struct drm_connector_state *conn_state; |
255 | int i; | |
256 | bool ret; | |
257 | ||
df63b999 ACO |
258 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
259 | if (!crtc_state->mode_changed) | |
623369e5 DV |
260 | continue; |
261 | ||
262 | drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); | |
263 | } | |
264 | ||
df63b999 | 265 | for_each_connector_in_state(state, connector, conn_state, i) { |
b5ceff20 | 266 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
267 | struct drm_encoder *encoder; |
268 | ||
623369e5 DV |
269 | WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); |
270 | ||
271 | if (!conn_state->crtc || !conn_state->best_encoder) | |
272 | continue; | |
273 | ||
274 | crtc_state = | |
275 | state->crtc_states[drm_crtc_index(conn_state->crtc)]; | |
276 | ||
277 | /* | |
278 | * Each encoder has at most one connector (since we always steal | |
279 | * it away), so we won't call ->mode_fixup twice. | |
280 | */ | |
281 | encoder = conn_state->best_encoder; | |
282 | funcs = encoder->helper_private; | |
283 | ||
284 | if (encoder->bridge && encoder->bridge->funcs->mode_fixup) { | |
285 | ret = encoder->bridge->funcs->mode_fixup( | |
286 | encoder->bridge, &crtc_state->mode, | |
287 | &crtc_state->adjusted_mode); | |
288 | if (!ret) { | |
17a38d9c | 289 | DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); |
623369e5 DV |
290 | return -EINVAL; |
291 | } | |
292 | } | |
293 | ||
4cd4df80 TR |
294 | if (funcs->atomic_check) { |
295 | ret = funcs->atomic_check(encoder, crtc_state, | |
296 | conn_state); | |
297 | if (ret) { | |
17a38d9c DV |
298 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", |
299 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
300 | return ret; |
301 | } | |
302 | } else { | |
303 | ret = funcs->mode_fixup(encoder, &crtc_state->mode, | |
304 | &crtc_state->adjusted_mode); | |
305 | if (!ret) { | |
17a38d9c DV |
306 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", |
307 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
308 | return -EINVAL; |
309 | } | |
623369e5 DV |
310 | } |
311 | } | |
312 | ||
df63b999 | 313 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 314 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 315 | |
df63b999 | 316 | if (!crtc_state->mode_changed) |
623369e5 DV |
317 | continue; |
318 | ||
319 | funcs = crtc->helper_private; | |
320 | ret = funcs->mode_fixup(crtc, &crtc_state->mode, | |
321 | &crtc_state->adjusted_mode); | |
322 | if (!ret) { | |
17a38d9c DV |
323 | DRM_DEBUG_ATOMIC("[CRTC:%d] fixup failed\n", |
324 | crtc->base.id); | |
623369e5 DV |
325 | return -EINVAL; |
326 | } | |
327 | } | |
328 | ||
329 | return 0; | |
330 | } | |
331 | ||
eab3bbef DV |
332 | static bool |
333 | needs_modeset(struct drm_crtc_state *state) | |
334 | { | |
335 | return state->mode_changed || state->active_changed; | |
336 | } | |
337 | ||
d9b13620 | 338 | /** |
f98bd3ef | 339 | * drm_atomic_helper_check_modeset - validate state object for modeset changes |
d9b13620 DV |
340 | * @dev: DRM device |
341 | * @state: the driver state object | |
342 | * | |
343 | * Check the state object to see if the requested state is physically possible. | |
344 | * This does all the crtc and connector related computations for an atomic | |
345 | * update. It computes and updates crtc_state->mode_changed, adds any additional | |
346 | * connectors needed for full modesets and calls down into ->mode_fixup | |
347 | * functions of the driver backend. | |
348 | * | |
349 | * IMPORTANT: | |
350 | * | |
351 | * Drivers which update ->mode_changed (e.g. in their ->atomic_check hooks if a | |
352 | * plane update can't be done without a full modeset) _must_ call this function | |
353 | * afterwards after that change. It is permitted to call this function multiple | |
354 | * times for the same update, e.g. when the ->atomic_check functions depend upon | |
355 | * the adjusted dotclock for fifo space allocation and watermark computation. | |
356 | * | |
357 | * RETURNS | |
358 | * Zero for success or -errno | |
359 | */ | |
360 | int | |
934ce1c2 | 361 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
362 | struct drm_atomic_state *state) |
363 | { | |
623369e5 DV |
364 | struct drm_crtc *crtc; |
365 | struct drm_crtc_state *crtc_state; | |
df63b999 ACO |
366 | struct drm_connector *connector; |
367 | struct drm_connector_state *connector_state; | |
623369e5 DV |
368 | int i, ret; |
369 | ||
df63b999 | 370 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 | 371 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { |
17a38d9c DV |
372 | DRM_DEBUG_ATOMIC("[CRTC:%d] mode changed\n", |
373 | crtc->base.id); | |
623369e5 DV |
374 | crtc_state->mode_changed = true; |
375 | } | |
376 | ||
377 | if (crtc->state->enable != crtc_state->enable) { | |
17a38d9c DV |
378 | DRM_DEBUG_ATOMIC("[CRTC:%d] enable changed\n", |
379 | crtc->base.id); | |
623369e5 DV |
380 | crtc_state->mode_changed = true; |
381 | } | |
382 | } | |
383 | ||
df63b999 | 384 | for_each_connector_in_state(state, connector, connector_state, i) { |
623369e5 DV |
385 | /* |
386 | * This only sets crtc->mode_changed for routing changes, | |
387 | * drivers must set crtc->mode_changed themselves when connector | |
388 | * properties need to be updated. | |
389 | */ | |
390 | ret = update_connector_routing(state, i); | |
391 | if (ret) | |
392 | return ret; | |
393 | } | |
394 | ||
395 | /* | |
396 | * After all the routing has been prepared we need to add in any | |
397 | * connector which is itself unchanged, but who's crtc changes it's | |
398 | * configuration. This must be done before calling mode_fixup in case a | |
399 | * crtc only changed its mode but has the same set of connectors. | |
400 | */ | |
df63b999 | 401 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 DV |
402 | int num_connectors; |
403 | ||
eab3bbef DV |
404 | /* |
405 | * We must set ->active_changed after walking connectors for | |
406 | * otherwise an update that only changes active would result in | |
407 | * a full modeset because update_connector_routing force that. | |
408 | */ | |
409 | if (crtc->state->active != crtc_state->active) { | |
17a38d9c DV |
410 | DRM_DEBUG_ATOMIC("[CRTC:%d] active changed\n", |
411 | crtc->base.id); | |
eab3bbef DV |
412 | crtc_state->active_changed = true; |
413 | } | |
414 | ||
415 | if (!needs_modeset(crtc_state)) | |
623369e5 DV |
416 | continue; |
417 | ||
17a38d9c DV |
418 | DRM_DEBUG_ATOMIC("[CRTC:%d] needs all connectors, enable: %c, active: %c\n", |
419 | crtc->base.id, | |
420 | crtc_state->enable ? 'y' : 'n', | |
eab3bbef | 421 | crtc_state->active ? 'y' : 'n'); |
623369e5 DV |
422 | |
423 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
424 | if (ret != 0) | |
425 | return ret; | |
426 | ||
427 | num_connectors = drm_atomic_connectors_for_crtc(state, | |
428 | crtc); | |
429 | ||
430 | if (crtc_state->enable != !!num_connectors) { | |
17a38d9c DV |
431 | DRM_DEBUG_ATOMIC("[CRTC:%d] enabled/connectors mismatch\n", |
432 | crtc->base.id); | |
623369e5 DV |
433 | |
434 | return -EINVAL; | |
435 | } | |
436 | } | |
437 | ||
438 | return mode_fixup(state); | |
439 | } | |
d9b13620 | 440 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 441 | |
c2fcd274 | 442 | /** |
f98bd3ef | 443 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
444 | * @dev: DRM device |
445 | * @state: the driver state object | |
446 | * | |
447 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 DV |
448 | * This does all the plane update related checks using by calling into the |
449 | * ->atomic_check hooks provided by the driver. | |
c2fcd274 DV |
450 | * |
451 | * RETURNS | |
452 | * Zero for success or -errno | |
453 | */ | |
d9b13620 DV |
454 | int |
455 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
456 | struct drm_atomic_state *state) | |
c2fcd274 | 457 | { |
df63b999 ACO |
458 | struct drm_crtc *crtc; |
459 | struct drm_crtc_state *crtc_state; | |
460 | struct drm_plane *plane; | |
461 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
462 | int i, ret = 0; |
463 | ||
df63b999 | 464 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 465 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
466 | |
467 | funcs = plane->helper_private; | |
468 | ||
469 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
470 | ||
471 | if (!funcs || !funcs->atomic_check) | |
472 | continue; | |
473 | ||
474 | ret = funcs->atomic_check(plane, plane_state); | |
475 | if (ret) { | |
17a38d9c DV |
476 | DRM_DEBUG_ATOMIC("[PLANE:%d] atomic driver check failed\n", |
477 | plane->base.id); | |
c2fcd274 DV |
478 | return ret; |
479 | } | |
480 | } | |
481 | ||
df63b999 | 482 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 483 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
484 | |
485 | funcs = crtc->helper_private; | |
486 | ||
487 | if (!funcs || !funcs->atomic_check) | |
488 | continue; | |
489 | ||
490 | ret = funcs->atomic_check(crtc, state->crtc_states[i]); | |
491 | if (ret) { | |
17a38d9c DV |
492 | DRM_DEBUG_ATOMIC("[CRTC:%d] atomic driver check failed\n", |
493 | crtc->base.id); | |
c2fcd274 DV |
494 | return ret; |
495 | } | |
496 | } | |
497 | ||
d9b13620 DV |
498 | return ret; |
499 | } | |
500 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
501 | ||
502 | /** | |
503 | * drm_atomic_helper_check - validate state object | |
504 | * @dev: DRM device | |
505 | * @state: the driver state object | |
506 | * | |
507 | * Check the state object to see if the requested state is physically possible. | |
508 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
509 | * checking that a driver needs it can simply wrap that around this function. | |
510 | * Drivers without such needs can directly use this as their ->atomic_check() | |
511 | * callback. | |
512 | * | |
b4274fbe DV |
513 | * This just wraps the two parts of the state checking for planes and modeset |
514 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
515 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
516 | * ->atomic_check functions depend upon an updated adjusted_mode.clock to | |
517 | * e.g. properly compute watermarks. | |
518 | * | |
d9b13620 DV |
519 | * RETURNS |
520 | * Zero for success or -errno | |
521 | */ | |
522 | int drm_atomic_helper_check(struct drm_device *dev, | |
523 | struct drm_atomic_state *state) | |
524 | { | |
525 | int ret; | |
526 | ||
b4274fbe | 527 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
528 | if (ret) |
529 | return ret; | |
530 | ||
b4274fbe | 531 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
532 | if (ret) |
533 | return ret; | |
534 | ||
c2fcd274 DV |
535 | return ret; |
536 | } | |
537 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
538 | ||
623369e5 DV |
539 | static void |
540 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
541 | { | |
df63b999 ACO |
542 | struct drm_connector *connector; |
543 | struct drm_connector_state *old_conn_state; | |
544 | struct drm_crtc *crtc; | |
545 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
546 | int i; |
547 | ||
df63b999 | 548 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 549 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 550 | struct drm_encoder *encoder; |
eab3bbef | 551 | struct drm_crtc_state *old_crtc_state; |
623369e5 | 552 | |
623369e5 DV |
553 | /* Shut down everything that's in the changeset and currently |
554 | * still on. So need to check the old, saved state. */ | |
df63b999 | 555 | if (!old_conn_state->crtc) |
623369e5 DV |
556 | continue; |
557 | ||
eab3bbef DV |
558 | old_crtc_state = old_state->crtc_states[drm_crtc_index(old_conn_state->crtc)]; |
559 | ||
4218a32f DV |
560 | if (!old_crtc_state->active || |
561 | !needs_modeset(old_conn_state->crtc->state)) | |
eab3bbef DV |
562 | continue; |
563 | ||
46df9adb | 564 | encoder = old_conn_state->best_encoder; |
623369e5 | 565 | |
46df9adb RC |
566 | /* We shouldn't get this far if we didn't previously have |
567 | * an encoder.. but WARN_ON() rather than explode. | |
568 | */ | |
569 | if (WARN_ON(!encoder)) | |
623369e5 DV |
570 | continue; |
571 | ||
572 | funcs = encoder->helper_private; | |
573 | ||
17a38d9c DV |
574 | DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
575 | encoder->base.id, encoder->name); | |
95d6eb3b | 576 | |
623369e5 DV |
577 | /* |
578 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 579 | * it away), so we won't call disable hooks twice. |
623369e5 DV |
580 | */ |
581 | if (encoder->bridge) | |
582 | encoder->bridge->funcs->disable(encoder->bridge); | |
583 | ||
584 | /* Right function depends upon target state. */ | |
ee0a89cf | 585 | if (connector->state->crtc && funcs->prepare) |
623369e5 DV |
586 | funcs->prepare(encoder); |
587 | else if (funcs->disable) | |
588 | funcs->disable(encoder); | |
589 | else | |
590 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
591 | ||
592 | if (encoder->bridge) | |
593 | encoder->bridge->funcs->post_disable(encoder->bridge); | |
594 | } | |
595 | ||
df63b999 | 596 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 597 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
598 | |
599 | /* Shut down everything that needs a full modeset. */ | |
df63b999 | 600 | if (!needs_modeset(crtc->state)) |
eab3bbef DV |
601 | continue; |
602 | ||
603 | if (!old_crtc_state->active) | |
623369e5 DV |
604 | continue; |
605 | ||
606 | funcs = crtc->helper_private; | |
607 | ||
17a38d9c DV |
608 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d]\n", |
609 | crtc->base.id); | |
95d6eb3b DV |
610 | |
611 | ||
623369e5 | 612 | /* Right function depends upon target state. */ |
ee0a89cf | 613 | if (crtc->state->enable && funcs->prepare) |
623369e5 DV |
614 | funcs->prepare(crtc); |
615 | else if (funcs->disable) | |
616 | funcs->disable(crtc); | |
617 | else | |
618 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
619 | } | |
620 | } | |
621 | ||
622 | static void | |
623 | set_routing_links(struct drm_device *dev, struct drm_atomic_state *old_state) | |
624 | { | |
df63b999 ACO |
625 | struct drm_connector *connector; |
626 | struct drm_connector_state *old_conn_state; | |
627 | struct drm_crtc *crtc; | |
628 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
629 | int i; |
630 | ||
631 | /* clear out existing links */ | |
df63b999 ACO |
632 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
633 | if (!connector->encoder) | |
623369e5 DV |
634 | continue; |
635 | ||
636 | WARN_ON(!connector->encoder->crtc); | |
637 | ||
638 | connector->encoder->crtc = NULL; | |
639 | connector->encoder = NULL; | |
640 | } | |
641 | ||
642 | /* set new links */ | |
df63b999 ACO |
643 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
644 | if (!connector->state->crtc) | |
623369e5 DV |
645 | continue; |
646 | ||
647 | if (WARN_ON(!connector->state->best_encoder)) | |
648 | continue; | |
649 | ||
650 | connector->encoder = connector->state->best_encoder; | |
651 | connector->encoder->crtc = connector->state->crtc; | |
652 | } | |
653 | ||
654 | /* set legacy state in the crtc structure */ | |
df63b999 | 655 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
623369e5 DV |
656 | crtc->mode = crtc->state->mode; |
657 | crtc->enabled = crtc->state->enable; | |
658 | crtc->x = crtc->primary->state->src_x >> 16; | |
659 | crtc->y = crtc->primary->state->src_y >> 16; | |
660 | } | |
661 | } | |
662 | ||
663 | static void | |
664 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
665 | { | |
df63b999 ACO |
666 | struct drm_crtc *crtc; |
667 | struct drm_crtc_state *old_crtc_state; | |
668 | struct drm_connector *connector; | |
669 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
670 | int i; |
671 | ||
df63b999 | 672 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 673 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 674 | |
df63b999 | 675 | if (!crtc->state->mode_changed) |
623369e5 DV |
676 | continue; |
677 | ||
678 | funcs = crtc->helper_private; | |
679 | ||
c982bd90 | 680 | if (crtc->state->enable && funcs->mode_set_nofb) { |
17a38d9c DV |
681 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d]\n", |
682 | crtc->base.id); | |
95d6eb3b | 683 | |
623369e5 | 684 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 685 | } |
623369e5 DV |
686 | } |
687 | ||
df63b999 | 688 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 689 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 690 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
691 | struct drm_encoder *encoder; |
692 | struct drm_display_mode *mode, *adjusted_mode; | |
693 | ||
df63b999 | 694 | if (!connector->state->best_encoder) |
623369e5 DV |
695 | continue; |
696 | ||
697 | encoder = connector->state->best_encoder; | |
698 | funcs = encoder->helper_private; | |
699 | new_crtc_state = connector->state->crtc->state; | |
700 | mode = &new_crtc_state->mode; | |
701 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
702 | ||
eab3bbef DV |
703 | if (!new_crtc_state->mode_changed) |
704 | continue; | |
705 | ||
17a38d9c DV |
706 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
707 | encoder->base.id, encoder->name); | |
95d6eb3b | 708 | |
623369e5 DV |
709 | /* |
710 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 711 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 712 | */ |
c982bd90 DV |
713 | if (funcs->mode_set) |
714 | funcs->mode_set(encoder, mode, adjusted_mode); | |
623369e5 DV |
715 | |
716 | if (encoder->bridge && encoder->bridge->funcs->mode_set) | |
717 | encoder->bridge->funcs->mode_set(encoder->bridge, | |
718 | mode, adjusted_mode); | |
719 | } | |
720 | } | |
721 | ||
722 | /** | |
1af434a9 | 723 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 724 | * @dev: DRM device |
a072f809 | 725 | * @old_state: atomic state object with old state structures |
623369e5 | 726 | * |
1af434a9 | 727 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 728 | * prepares them (if required) with the new mode. |
1af434a9 DV |
729 | * |
730 | * For compatability with legacy crtc helpers this should be called before | |
731 | * drm_atomic_helper_commit_planes(), which is what the default commit function | |
732 | * does. But drivers with different needs can group the modeset commits together | |
733 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
734 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 735 | */ |
1af434a9 DV |
736 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
737 | struct drm_atomic_state *old_state) | |
623369e5 | 738 | { |
a072f809 LP |
739 | disable_outputs(dev, old_state); |
740 | set_routing_links(dev, old_state); | |
741 | crtc_set_mode(dev, old_state); | |
623369e5 | 742 | } |
1af434a9 | 743 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 DV |
744 | |
745 | /** | |
1af434a9 | 746 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
747 | * @dev: DRM device |
748 | * @old_state: atomic state object with old state structures | |
749 | * | |
1af434a9 DV |
750 | * This function enables all the outputs with the new configuration which had to |
751 | * be turned off for the update. | |
752 | * | |
753 | * For compatability with legacy crtc helpers this should be called after | |
754 | * drm_atomic_helper_commit_planes(), which is what the default commit function | |
755 | * does. But drivers with different needs can group the modeset commits together | |
756 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
757 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 758 | */ |
1af434a9 DV |
759 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
760 | struct drm_atomic_state *old_state) | |
623369e5 | 761 | { |
df63b999 ACO |
762 | struct drm_crtc *crtc; |
763 | struct drm_crtc_state *old_crtc_state; | |
764 | struct drm_connector *connector; | |
765 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
766 | int i; |
767 | ||
df63b999 | 768 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 769 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
770 | |
771 | /* Need to filter out CRTCs where only planes change. */ | |
df63b999 | 772 | if (!needs_modeset(crtc->state)) |
eab3bbef DV |
773 | continue; |
774 | ||
775 | if (!crtc->state->active) | |
623369e5 DV |
776 | continue; |
777 | ||
778 | funcs = crtc->helper_private; | |
779 | ||
ee0a89cf | 780 | if (crtc->state->enable) { |
17a38d9c DV |
781 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d]\n", |
782 | crtc->base.id); | |
95d6eb3b | 783 | |
ee0a89cf DV |
784 | if (funcs->enable) |
785 | funcs->enable(crtc); | |
786 | else | |
787 | funcs->commit(crtc); | |
788 | } | |
623369e5 DV |
789 | } |
790 | ||
df63b999 | 791 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 792 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
793 | struct drm_encoder *encoder; |
794 | ||
df63b999 | 795 | if (!connector->state->best_encoder) |
623369e5 DV |
796 | continue; |
797 | ||
4218a32f DV |
798 | if (!connector->state->crtc->state->active || |
799 | !needs_modeset(connector->state->crtc->state)) | |
eab3bbef DV |
800 | continue; |
801 | ||
623369e5 DV |
802 | encoder = connector->state->best_encoder; |
803 | funcs = encoder->helper_private; | |
804 | ||
17a38d9c DV |
805 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
806 | encoder->base.id, encoder->name); | |
95d6eb3b | 807 | |
623369e5 DV |
808 | /* |
809 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 810 | * it away), so we won't call enable hooks twice. |
623369e5 DV |
811 | */ |
812 | if (encoder->bridge) | |
813 | encoder->bridge->funcs->pre_enable(encoder->bridge); | |
814 | ||
ee0a89cf DV |
815 | if (funcs->enable) |
816 | funcs->enable(encoder); | |
817 | else | |
818 | funcs->commit(encoder); | |
623369e5 DV |
819 | |
820 | if (encoder->bridge) | |
821 | encoder->bridge->funcs->enable(encoder->bridge); | |
822 | } | |
823 | } | |
1af434a9 | 824 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 825 | |
e2330f07 DV |
826 | static void wait_for_fences(struct drm_device *dev, |
827 | struct drm_atomic_state *state) | |
828 | { | |
df63b999 ACO |
829 | struct drm_plane *plane; |
830 | struct drm_plane_state *plane_state; | |
e2330f07 DV |
831 | int i; |
832 | ||
df63b999 ACO |
833 | for_each_plane_in_state(state, plane, plane_state, i) { |
834 | if (!plane->state->fence) | |
e2330f07 DV |
835 | continue; |
836 | ||
837 | WARN_ON(!plane->state->fb); | |
838 | ||
839 | fence_wait(plane->state->fence, false); | |
840 | fence_put(plane->state->fence); | |
841 | plane->state->fence = NULL; | |
842 | } | |
843 | } | |
844 | ||
ab58e338 DV |
845 | static bool framebuffer_changed(struct drm_device *dev, |
846 | struct drm_atomic_state *old_state, | |
847 | struct drm_crtc *crtc) | |
848 | { | |
849 | struct drm_plane *plane; | |
850 | struct drm_plane_state *old_plane_state; | |
ab58e338 DV |
851 | int i; |
852 | ||
df63b999 | 853 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
ab58e338 DV |
854 | if (plane->state->crtc != crtc && |
855 | old_plane_state->crtc != crtc) | |
856 | continue; | |
857 | ||
858 | if (plane->state->fb != old_plane_state->fb) | |
859 | return true; | |
860 | } | |
861 | ||
862 | return false; | |
863 | } | |
864 | ||
5ee3229c RC |
865 | /** |
866 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
867 | * @dev: DRM device | |
868 | * @old_state: atomic state object with old state structures | |
869 | * | |
870 | * Helper to, after atomic commit, wait for vblanks on all effected | |
871 | * crtcs (ie. before cleaning up old framebuffers using | |
ab58e338 DV |
872 | * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
873 | * framebuffers have actually changed to optimize for the legacy cursor and | |
874 | * plane update use-case. | |
5ee3229c RC |
875 | */ |
876 | void | |
877 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
878 | struct drm_atomic_state *old_state) | |
623369e5 DV |
879 | { |
880 | struct drm_crtc *crtc; | |
881 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
882 | int i, ret; |
883 | ||
df63b999 | 884 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
623369e5 DV |
885 | /* No one cares about the old state, so abuse it for tracking |
886 | * and store whether we hold a vblank reference (and should do a | |
887 | * vblank wait) in the ->enable boolean. */ | |
888 | old_crtc_state->enable = false; | |
889 | ||
890 | if (!crtc->state->enable) | |
891 | continue; | |
892 | ||
f02ad907 DV |
893 | /* Legacy cursor ioctls are completely unsynced, and userspace |
894 | * relies on that (by doing tons of cursor updates). */ | |
895 | if (old_state->legacy_cursor_update) | |
896 | continue; | |
897 | ||
ab58e338 DV |
898 | if (!framebuffer_changed(dev, old_state, crtc)) |
899 | continue; | |
900 | ||
623369e5 DV |
901 | ret = drm_crtc_vblank_get(crtc); |
902 | if (ret != 0) | |
903 | continue; | |
904 | ||
905 | old_crtc_state->enable = true; | |
906 | old_crtc_state->last_vblank_count = drm_vblank_count(dev, i); | |
907 | } | |
908 | ||
df63b999 ACO |
909 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
910 | if (!old_crtc_state->enable) | |
623369e5 DV |
911 | continue; |
912 | ||
913 | ret = wait_event_timeout(dev->vblank[i].queue, | |
914 | old_crtc_state->last_vblank_count != | |
915 | drm_vblank_count(dev, i), | |
916 | msecs_to_jiffies(50)); | |
917 | ||
918 | drm_crtc_vblank_put(crtc); | |
919 | } | |
920 | } | |
5ee3229c | 921 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 DV |
922 | |
923 | /** | |
924 | * drm_atomic_helper_commit - commit validated state object | |
925 | * @dev: DRM device | |
926 | * @state: the driver state object | |
927 | * @async: asynchronous commit | |
928 | * | |
929 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
930 | * object. This can still fail when e.g. the framebuffer reservation fails. For | |
931 | * now this doesn't implement asynchronous commits. | |
932 | * | |
933 | * RETURNS | |
934 | * Zero for success or -errno. | |
935 | */ | |
936 | int drm_atomic_helper_commit(struct drm_device *dev, | |
937 | struct drm_atomic_state *state, | |
938 | bool async) | |
939 | { | |
940 | int ret; | |
941 | ||
942 | if (async) | |
943 | return -EBUSY; | |
944 | ||
945 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
946 | if (ret) | |
947 | return ret; | |
948 | ||
949 | /* | |
950 | * This is the point of no return - everything below never fails except | |
951 | * when the hw goes bonghits. Which means we can commit the new state on | |
952 | * the software side now. | |
953 | */ | |
954 | ||
955 | drm_atomic_helper_swap_state(dev, state); | |
956 | ||
957 | /* | |
958 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 959 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
960 | * that the asynchronous work has either been cancelled (if the driver |
961 | * supports it, which at least requires that the framebuffers get | |
962 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
963 | * before the new state gets committed on the software side with | |
964 | * drm_atomic_helper_swap_state(). | |
965 | * | |
966 | * This scheme allows new atomic state updates to be prepared and | |
967 | * checked in parallel to the asynchronous completion of the previous | |
968 | * update. Which is important since compositors need to figure out the | |
969 | * composition of the next frame right after having submitted the | |
970 | * current layout. | |
971 | */ | |
972 | ||
e2330f07 DV |
973 | wait_for_fences(dev, state); |
974 | ||
1af434a9 | 975 | drm_atomic_helper_commit_modeset_disables(dev, state); |
623369e5 DV |
976 | |
977 | drm_atomic_helper_commit_planes(dev, state); | |
978 | ||
1af434a9 | 979 | drm_atomic_helper_commit_modeset_enables(dev, state); |
623369e5 | 980 | |
5ee3229c | 981 | drm_atomic_helper_wait_for_vblanks(dev, state); |
623369e5 DV |
982 | |
983 | drm_atomic_helper_cleanup_planes(dev, state); | |
984 | ||
985 | drm_atomic_state_free(state); | |
986 | ||
987 | return 0; | |
988 | } | |
989 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
990 | ||
e8c833a7 DV |
991 | /** |
992 | * DOC: implementing async commit | |
993 | * | |
994 | * For now the atomic helpers don't support async commit directly. If there is | |
995 | * real need it could be added though, using the dma-buf fence infrastructure | |
996 | * for generic synchronization with outstanding rendering. | |
997 | * | |
998 | * For now drivers have to implement async commit themselves, with the following | |
999 | * sequence being the recommended one: | |
1000 | * | |
1001 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
1002 | * which commit needs to call which can fail, so we want to run it first and | |
1003 | * synchronously. | |
1004 | * | |
1005 | * 2. Synchronize with any outstanding asynchronous commit worker threads which | |
1006 | * might be affected the new state update. This can be done by either cancelling | |
1007 | * or flushing the work items, depending upon whether the driver can deal with | |
1008 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
1009 | * cleanup is still done when cancelling. | |
1010 | * | |
1011 | * For sufficient parallelism it is recommended to have a work item per crtc | |
1012 | * (for updates which don't touch global state) and a global one. Then we only | |
1013 | * need to synchronize with the crtc work items for changed crtcs and the global | |
1014 | * work item, which allows nice concurrent updates on disjoint sets of crtcs. | |
1015 | * | |
1016 | * 3. The software state is updated synchronously with | |
1017 | * drm_atomic_helper_swap_state. Doing this under the protection of all modeset | |
1018 | * locks means concurrent callers never see inconsistent state. And doing this | |
1019 | * while it's guaranteed that no relevant async worker runs means that async | |
1020 | * workers do not need grab any locks. Actually they must not grab locks, for | |
1021 | * otherwise the work flushing will deadlock. | |
1022 | * | |
1023 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1024 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1025 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
1026 | * being displayed. | |
1027 | */ | |
1028 | ||
c2fcd274 | 1029 | /** |
2e3afd47 | 1030 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 1031 | * @dev: DRM device |
2e3afd47 | 1032 | * @state: atomic state object with new state structures |
c2fcd274 DV |
1033 | * |
1034 | * This function prepares plane state, specifically framebuffers, for the new | |
1035 | * configuration. If any failure is encountered this function will call | |
1036 | * ->cleanup_fb on any already successfully prepared framebuffer. | |
1037 | * | |
1038 | * Returns: | |
1039 | * 0 on success, negative error code on failure. | |
1040 | */ | |
1041 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
1042 | struct drm_atomic_state *state) | |
1043 | { | |
1044 | int nplanes = dev->mode_config.num_total_plane; | |
1045 | int ret, i; | |
1046 | ||
1047 | for (i = 0; i < nplanes; i++) { | |
b5ceff20 | 1048 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1049 | struct drm_plane *plane = state->planes[i]; |
d136dfee | 1050 | struct drm_plane_state *plane_state = state->plane_states[i]; |
c2fcd274 DV |
1051 | struct drm_framebuffer *fb; |
1052 | ||
1053 | if (!plane) | |
1054 | continue; | |
1055 | ||
1056 | funcs = plane->helper_private; | |
1057 | ||
d136dfee | 1058 | fb = plane_state->fb; |
c2fcd274 DV |
1059 | |
1060 | if (fb && funcs->prepare_fb) { | |
d136dfee | 1061 | ret = funcs->prepare_fb(plane, fb, plane_state); |
c2fcd274 DV |
1062 | if (ret) |
1063 | goto fail; | |
1064 | } | |
1065 | } | |
1066 | ||
1067 | return 0; | |
1068 | ||
1069 | fail: | |
1070 | for (i--; i >= 0; i--) { | |
b5ceff20 | 1071 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1072 | struct drm_plane *plane = state->planes[i]; |
d136dfee | 1073 | struct drm_plane_state *plane_state = state->plane_states[i]; |
c2fcd274 DV |
1074 | struct drm_framebuffer *fb; |
1075 | ||
1076 | if (!plane) | |
1077 | continue; | |
1078 | ||
1079 | funcs = plane->helper_private; | |
1080 | ||
1081 | fb = state->plane_states[i]->fb; | |
1082 | ||
1083 | if (fb && funcs->cleanup_fb) | |
d136dfee | 1084 | funcs->cleanup_fb(plane, fb, plane_state); |
c2fcd274 DV |
1085 | |
1086 | } | |
1087 | ||
1088 | return ret; | |
1089 | } | |
1090 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
1091 | ||
1092 | /** | |
1093 | * drm_atomic_helper_commit_planes - commit plane state | |
1094 | * @dev: DRM device | |
b0fcfc89 | 1095 | * @old_state: atomic state object with old state structures |
c2fcd274 DV |
1096 | * |
1097 | * This function commits the new plane state using the plane and atomic helper | |
1098 | * functions for planes and crtcs. It assumes that the atomic state has already | |
1099 | * been pushed into the relevant object state pointers, since this step can no | |
1100 | * longer fail. | |
1101 | * | |
b0fcfc89 | 1102 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 DV |
1103 | * crtcs need to be updated though. |
1104 | */ | |
1105 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
b0fcfc89 | 1106 | struct drm_atomic_state *old_state) |
c2fcd274 | 1107 | { |
df63b999 ACO |
1108 | struct drm_crtc *crtc; |
1109 | struct drm_crtc_state *old_crtc_state; | |
1110 | struct drm_plane *plane; | |
1111 | struct drm_plane_state *old_plane_state; | |
c2fcd274 DV |
1112 | int i; |
1113 | ||
df63b999 | 1114 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1115 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1116 | |
1117 | funcs = crtc->helper_private; | |
1118 | ||
1119 | if (!funcs || !funcs->atomic_begin) | |
1120 | continue; | |
1121 | ||
1122 | funcs->atomic_begin(crtc); | |
1123 | } | |
1124 | ||
df63b999 | 1125 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
b5ceff20 | 1126 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
1127 | |
1128 | funcs = plane->helper_private; | |
1129 | ||
3cad4b68 | 1130 | if (!funcs) |
c2fcd274 DV |
1131 | continue; |
1132 | ||
f1c37e1a TR |
1133 | old_plane_state = old_state->plane_states[i]; |
1134 | ||
407b8bd9 TR |
1135 | /* |
1136 | * Special-case disabling the plane if drivers support it. | |
1137 | */ | |
1138 | if (drm_atomic_plane_disabling(plane, old_plane_state) && | |
1139 | funcs->atomic_disable) | |
1140 | funcs->atomic_disable(plane, old_plane_state); | |
475d231b DV |
1141 | else if (plane->state->crtc || |
1142 | drm_atomic_plane_disabling(plane, old_plane_state)) | |
407b8bd9 | 1143 | funcs->atomic_update(plane, old_plane_state); |
c2fcd274 DV |
1144 | } |
1145 | ||
df63b999 | 1146 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1147 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1148 | |
1149 | funcs = crtc->helper_private; | |
1150 | ||
1151 | if (!funcs || !funcs->atomic_flush) | |
1152 | continue; | |
1153 | ||
1154 | funcs->atomic_flush(crtc); | |
1155 | } | |
1156 | } | |
1157 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1158 | ||
1159 | /** | |
1160 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1161 | * @dev: DRM device | |
1162 | * @old_state: atomic state object with old state structures | |
1163 | * | |
1164 | * This function cleans up plane state, specifically framebuffers, from the old | |
1165 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1166 | * be able to call this function. | |
1167 | * | |
1168 | * This function must also be called on the new state when the atomic update | |
1169 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1170 | */ | |
1171 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1172 | struct drm_atomic_state *old_state) | |
1173 | { | |
df63b999 ACO |
1174 | struct drm_plane *plane; |
1175 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
1176 | int i; |
1177 | ||
df63b999 | 1178 | for_each_plane_in_state(old_state, plane, plane_state, i) { |
b5ceff20 | 1179 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
1180 | struct drm_framebuffer *old_fb; |
1181 | ||
c2fcd274 DV |
1182 | funcs = plane->helper_private; |
1183 | ||
d136dfee | 1184 | old_fb = plane_state->fb; |
c2fcd274 DV |
1185 | |
1186 | if (old_fb && funcs->cleanup_fb) | |
d136dfee | 1187 | funcs->cleanup_fb(plane, old_fb, plane_state); |
c2fcd274 DV |
1188 | } |
1189 | } | |
1190 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1191 | ||
1192 | /** | |
1193 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
1194 | * @dev: DRM device | |
1195 | * @state: atomic state | |
1196 | * | |
1197 | * This function stores the atomic state into the current state pointers in all | |
1198 | * driver objects. It should be called after all failing steps have been done | |
1199 | * and succeeded, but before the actual hardware state is committed. | |
1200 | * | |
1201 | * For cleanup and error recovery the current state for all changed objects will | |
1202 | * be swaped into @state. | |
1203 | * | |
1204 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1205 | * | |
1206 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1207 | * | |
1208 | * 2. Do any other steps that might fail. | |
1209 | * | |
1210 | * 3. Put the staged state into the current state pointers with this function. | |
1211 | * | |
1212 | * 4. Actually commit the hardware state. | |
1213 | * | |
1214 | * 5. Call drm_atomic_helper_cleanup_planes with @state, which since step 3 | |
1215 | * contains the old state. Also do any other cleanup required with that state. | |
1216 | */ | |
1217 | void drm_atomic_helper_swap_state(struct drm_device *dev, | |
1218 | struct drm_atomic_state *state) | |
1219 | { | |
1220 | int i; | |
1221 | ||
1222 | for (i = 0; i < dev->mode_config.num_connector; i++) { | |
1223 | struct drm_connector *connector = state->connectors[i]; | |
1224 | ||
1225 | if (!connector) | |
1226 | continue; | |
1227 | ||
1228 | connector->state->state = state; | |
1229 | swap(state->connector_states[i], connector->state); | |
1230 | connector->state->state = NULL; | |
1231 | } | |
1232 | ||
1233 | for (i = 0; i < dev->mode_config.num_crtc; i++) { | |
1234 | struct drm_crtc *crtc = state->crtcs[i]; | |
1235 | ||
1236 | if (!crtc) | |
1237 | continue; | |
1238 | ||
1239 | crtc->state->state = state; | |
1240 | swap(state->crtc_states[i], crtc->state); | |
1241 | crtc->state->state = NULL; | |
1242 | } | |
1243 | ||
1244 | for (i = 0; i < dev->mode_config.num_total_plane; i++) { | |
1245 | struct drm_plane *plane = state->planes[i]; | |
1246 | ||
1247 | if (!plane) | |
1248 | continue; | |
1249 | ||
1250 | plane->state->state = state; | |
1251 | swap(state->plane_states[i], plane->state); | |
1252 | plane->state->state = NULL; | |
1253 | } | |
1254 | } | |
1255 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
1256 | |
1257 | /** | |
1258 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
1259 | * @plane: plane object to update | |
1260 | * @crtc: owning CRTC of owning plane | |
1261 | * @fb: framebuffer to flip onto plane | |
1262 | * @crtc_x: x offset of primary plane on crtc | |
1263 | * @crtc_y: y offset of primary plane on crtc | |
1264 | * @crtc_w: width of primary plane rectangle on crtc | |
1265 | * @crtc_h: height of primary plane rectangle on crtc | |
1266 | * @src_x: x offset of @fb for panning | |
1267 | * @src_y: y offset of @fb for panning | |
1268 | * @src_w: width of source rectangle in @fb | |
1269 | * @src_h: height of source rectangle in @fb | |
1270 | * | |
1271 | * Provides a default plane update handler using the atomic driver interface. | |
1272 | * | |
1273 | * RETURNS: | |
1274 | * Zero on success, error code on failure | |
1275 | */ | |
1276 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
1277 | struct drm_crtc *crtc, | |
1278 | struct drm_framebuffer *fb, | |
1279 | int crtc_x, int crtc_y, | |
1280 | unsigned int crtc_w, unsigned int crtc_h, | |
1281 | uint32_t src_x, uint32_t src_y, | |
1282 | uint32_t src_w, uint32_t src_h) | |
1283 | { | |
1284 | struct drm_atomic_state *state; | |
1285 | struct drm_plane_state *plane_state; | |
1286 | int ret = 0; | |
1287 | ||
1288 | state = drm_atomic_state_alloc(plane->dev); | |
1289 | if (!state) | |
1290 | return -ENOMEM; | |
1291 | ||
1292 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1293 | retry: | |
1294 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1295 | if (IS_ERR(plane_state)) { | |
1296 | ret = PTR_ERR(plane_state); | |
1297 | goto fail; | |
1298 | } | |
1299 | ||
07cc0ef6 | 1300 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
1301 | if (ret != 0) |
1302 | goto fail; | |
321ebf04 | 1303 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
1304 | plane_state->crtc_x = crtc_x; |
1305 | plane_state->crtc_y = crtc_y; | |
1306 | plane_state->crtc_h = crtc_h; | |
1307 | plane_state->crtc_w = crtc_w; | |
1308 | plane_state->src_x = src_x; | |
1309 | plane_state->src_y = src_y; | |
1310 | plane_state->src_h = src_h; | |
1311 | plane_state->src_w = src_w; | |
1312 | ||
3671c580 DV |
1313 | if (plane == crtc->cursor) |
1314 | state->legacy_cursor_update = true; | |
1315 | ||
042652ed DV |
1316 | ret = drm_atomic_commit(state); |
1317 | if (ret != 0) | |
1318 | goto fail; | |
1319 | ||
1320 | /* Driver takes ownership of state on successful commit. */ | |
1321 | return 0; | |
1322 | fail: | |
1323 | if (ret == -EDEADLK) | |
1324 | goto backoff; | |
1325 | ||
1326 | drm_atomic_state_free(state); | |
1327 | ||
1328 | return ret; | |
1329 | backoff: | |
042652ed | 1330 | drm_atomic_state_clear(state); |
6f75cea6 | 1331 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1332 | |
1333 | /* | |
1334 | * Someone might have exchanged the framebuffer while we dropped locks | |
1335 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1336 | * core does for us. | |
1337 | */ | |
1338 | plane->old_fb = plane->fb; | |
1339 | ||
1340 | goto retry; | |
1341 | } | |
1342 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
1343 | ||
1344 | /** | |
1345 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
1346 | * @plane: plane to disable | |
1347 | * | |
1348 | * Provides a default plane disable handler using the atomic driver interface. | |
1349 | * | |
1350 | * RETURNS: | |
1351 | * Zero on success, error code on failure | |
1352 | */ | |
1353 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
1354 | { | |
1355 | struct drm_atomic_state *state; | |
1356 | struct drm_plane_state *plane_state; | |
1357 | int ret = 0; | |
1358 | ||
aa54e2ee JSP |
1359 | /* |
1360 | * FIXME: Without plane->crtc set we can't get at the implicit legacy | |
1361 | * acquire context. The real fix will be to wire the acquire ctx through | |
1362 | * everywhere we need it, but meanwhile prevent chaos by just skipping | |
1363 | * this noop. The critical case is the cursor ioctls which a) only grab | |
1364 | * crtc/cursor-plane locks (so we need the crtc to get at the right | |
1365 | * acquire context) and b) can try to disable the plane multiple times. | |
1366 | */ | |
1367 | if (!plane->crtc) | |
1368 | return 0; | |
1369 | ||
042652ed DV |
1370 | state = drm_atomic_state_alloc(plane->dev); |
1371 | if (!state) | |
1372 | return -ENOMEM; | |
1373 | ||
1374 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
1375 | retry: | |
1376 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1377 | if (IS_ERR(plane_state)) { | |
1378 | ret = PTR_ERR(plane_state); | |
1379 | goto fail; | |
1380 | } | |
1381 | ||
07cc0ef6 | 1382 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); |
042652ed DV |
1383 | if (ret != 0) |
1384 | goto fail; | |
321ebf04 | 1385 | drm_atomic_set_fb_for_plane(plane_state, NULL); |
042652ed DV |
1386 | plane_state->crtc_x = 0; |
1387 | plane_state->crtc_y = 0; | |
1388 | plane_state->crtc_h = 0; | |
1389 | plane_state->crtc_w = 0; | |
1390 | plane_state->src_x = 0; | |
1391 | plane_state->src_y = 0; | |
1392 | plane_state->src_h = 0; | |
1393 | plane_state->src_w = 0; | |
1394 | ||
f02ad907 DV |
1395 | if (plane == plane->crtc->cursor) |
1396 | state->legacy_cursor_update = true; | |
1397 | ||
042652ed DV |
1398 | ret = drm_atomic_commit(state); |
1399 | if (ret != 0) | |
1400 | goto fail; | |
1401 | ||
1402 | /* Driver takes ownership of state on successful commit. */ | |
1403 | return 0; | |
1404 | fail: | |
1405 | if (ret == -EDEADLK) | |
1406 | goto backoff; | |
1407 | ||
1408 | drm_atomic_state_free(state); | |
1409 | ||
1410 | return ret; | |
1411 | backoff: | |
042652ed | 1412 | drm_atomic_state_clear(state); |
6f75cea6 | 1413 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1414 | |
1415 | /* | |
1416 | * Someone might have exchanged the framebuffer while we dropped locks | |
1417 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1418 | * core does for us. | |
1419 | */ | |
1420 | plane->old_fb = plane->fb; | |
1421 | ||
1422 | goto retry; | |
1423 | } | |
1424 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
1425 | ||
1426 | static int update_output_state(struct drm_atomic_state *state, | |
1427 | struct drm_mode_set *set) | |
1428 | { | |
1429 | struct drm_device *dev = set->crtc->dev; | |
df63b999 ACO |
1430 | struct drm_crtc *crtc; |
1431 | struct drm_crtc_state *crtc_state; | |
1432 | struct drm_connector *connector; | |
042652ed | 1433 | struct drm_connector_state *conn_state; |
042652ed DV |
1434 | int ret, i, j; |
1435 | ||
1436 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
1437 | state->acquire_ctx); | |
1438 | if (ret) | |
1439 | return ret; | |
1440 | ||
1441 | /* First grab all affected connector/crtc states. */ | |
1442 | for (i = 0; i < set->num_connectors; i++) { | |
1443 | conn_state = drm_atomic_get_connector_state(state, | |
1444 | set->connectors[i]); | |
1445 | if (IS_ERR(conn_state)) | |
1446 | return PTR_ERR(conn_state); | |
1447 | } | |
1448 | ||
df63b999 | 1449 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
1450 | ret = drm_atomic_add_affected_connectors(state, crtc); |
1451 | if (ret) | |
1452 | return ret; | |
1453 | } | |
1454 | ||
1455 | /* Then recompute connector->crtc links and crtc enabling state. */ | |
df63b999 | 1456 | for_each_connector_in_state(state, connector, conn_state, i) { |
042652ed DV |
1457 | if (conn_state->crtc == set->crtc) { |
1458 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1459 | NULL); | |
1460 | if (ret) | |
1461 | return ret; | |
1462 | } | |
1463 | ||
1464 | for (j = 0; j < set->num_connectors; j++) { | |
1465 | if (set->connectors[j] == connector) { | |
1466 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1467 | set->crtc); | |
1468 | if (ret) | |
1469 | return ret; | |
1470 | break; | |
1471 | } | |
1472 | } | |
1473 | } | |
1474 | ||
df63b999 | 1475 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
1476 | /* Don't update ->enable for the CRTC in the set_config request, |
1477 | * since a mismatch would indicate a bug in the upper layers. | |
1478 | * The actual modeset code later on will catch any | |
1479 | * inconsistencies here. */ | |
1480 | if (crtc == set->crtc) | |
1481 | continue; | |
1482 | ||
1483 | crtc_state->enable = | |
1484 | drm_atomic_connectors_for_crtc(state, crtc); | |
1485 | } | |
1486 | ||
1487 | return 0; | |
1488 | } | |
1489 | ||
1490 | /** | |
1491 | * drm_atomic_helper_set_config - set a new config from userspace | |
1492 | * @set: mode set configuration | |
1493 | * | |
1494 | * Provides a default crtc set_config handler using the atomic driver interface. | |
1495 | * | |
1496 | * Returns: | |
1497 | * Returns 0 on success, negative errno numbers on failure. | |
1498 | */ | |
1499 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
1500 | { | |
1501 | struct drm_atomic_state *state; | |
1502 | struct drm_crtc *crtc = set->crtc; | |
1503 | struct drm_crtc_state *crtc_state; | |
1504 | struct drm_plane_state *primary_state; | |
1505 | int ret = 0; | |
1506 | ||
1507 | state = drm_atomic_state_alloc(crtc->dev); | |
1508 | if (!state) | |
1509 | return -ENOMEM; | |
1510 | ||
1511 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1512 | retry: | |
1513 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1514 | if (IS_ERR(crtc_state)) { | |
1515 | ret = PTR_ERR(crtc_state); | |
1516 | goto fail; | |
1517 | } | |
1518 | ||
e5b5341c RC |
1519 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); |
1520 | if (IS_ERR(primary_state)) { | |
1521 | ret = PTR_ERR(primary_state); | |
1522 | goto fail; | |
1523 | } | |
1524 | ||
042652ed DV |
1525 | if (!set->mode) { |
1526 | WARN_ON(set->fb); | |
1527 | WARN_ON(set->num_connectors); | |
1528 | ||
1529 | crtc_state->enable = false; | |
eab3bbef | 1530 | crtc_state->active = false; |
e5b5341c | 1531 | |
07cc0ef6 | 1532 | ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
e5b5341c RC |
1533 | if (ret != 0) |
1534 | goto fail; | |
1535 | ||
1536 | drm_atomic_set_fb_for_plane(primary_state, NULL); | |
1537 | ||
042652ed DV |
1538 | goto commit; |
1539 | } | |
1540 | ||
1541 | WARN_ON(!set->fb); | |
1542 | WARN_ON(!set->num_connectors); | |
1543 | ||
1544 | crtc_state->enable = true; | |
eab3bbef | 1545 | crtc_state->active = true; |
042652ed DV |
1546 | drm_mode_copy(&crtc_state->mode, set->mode); |
1547 | ||
07cc0ef6 | 1548 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
042652ed DV |
1549 | if (ret != 0) |
1550 | goto fail; | |
321ebf04 | 1551 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
042652ed DV |
1552 | primary_state->crtc_x = 0; |
1553 | primary_state->crtc_y = 0; | |
1554 | primary_state->crtc_h = set->mode->vdisplay; | |
1555 | primary_state->crtc_w = set->mode->hdisplay; | |
1556 | primary_state->src_x = set->x << 16; | |
1557 | primary_state->src_y = set->y << 16; | |
1558 | primary_state->src_h = set->mode->vdisplay << 16; | |
1559 | primary_state->src_w = set->mode->hdisplay << 16; | |
1560 | ||
1561 | commit: | |
1562 | ret = update_output_state(state, set); | |
1563 | if (ret) | |
1564 | goto fail; | |
1565 | ||
1566 | ret = drm_atomic_commit(state); | |
1567 | if (ret != 0) | |
1568 | goto fail; | |
1569 | ||
1570 | /* Driver takes ownership of state on successful commit. */ | |
1571 | return 0; | |
1572 | fail: | |
1573 | if (ret == -EDEADLK) | |
1574 | goto backoff; | |
1575 | ||
1576 | drm_atomic_state_free(state); | |
1577 | ||
1578 | return ret; | |
1579 | backoff: | |
042652ed | 1580 | drm_atomic_state_clear(state); |
6f75cea6 | 1581 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1582 | |
1583 | /* | |
1584 | * Someone might have exchanged the framebuffer while we dropped locks | |
1585 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1586 | * core does for us. | |
1587 | */ | |
1588 | crtc->primary->old_fb = crtc->primary->fb; | |
1589 | ||
1590 | goto retry; | |
1591 | } | |
1592 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
1593 | ||
1594 | /** | |
7f50002f | 1595 | * drm_atomic_helper_crtc_set_property - helper for crtc properties |
042652ed DV |
1596 | * @crtc: DRM crtc |
1597 | * @property: DRM property | |
1598 | * @val: value of property | |
1599 | * | |
7f50002f LP |
1600 | * Provides a default crtc set_property handler using the atomic driver |
1601 | * interface. | |
042652ed DV |
1602 | * |
1603 | * RETURNS: | |
1604 | * Zero on success, error code on failure | |
1605 | */ | |
1606 | int | |
1607 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
1608 | struct drm_property *property, | |
1609 | uint64_t val) | |
1610 | { | |
1611 | struct drm_atomic_state *state; | |
1612 | struct drm_crtc_state *crtc_state; | |
1613 | int ret = 0; | |
1614 | ||
1615 | state = drm_atomic_state_alloc(crtc->dev); | |
1616 | if (!state) | |
1617 | return -ENOMEM; | |
1618 | ||
1619 | /* ->set_property is always called with all locks held. */ | |
1620 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
1621 | retry: | |
1622 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1623 | if (IS_ERR(crtc_state)) { | |
1624 | ret = PTR_ERR(crtc_state); | |
1625 | goto fail; | |
1626 | } | |
1627 | ||
40ecc694 RC |
1628 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
1629 | property, val); | |
042652ed DV |
1630 | if (ret) |
1631 | goto fail; | |
1632 | ||
1633 | ret = drm_atomic_commit(state); | |
1634 | if (ret != 0) | |
1635 | goto fail; | |
1636 | ||
1637 | /* Driver takes ownership of state on successful commit. */ | |
1638 | return 0; | |
1639 | fail: | |
1640 | if (ret == -EDEADLK) | |
1641 | goto backoff; | |
1642 | ||
1643 | drm_atomic_state_free(state); | |
1644 | ||
1645 | return ret; | |
1646 | backoff: | |
042652ed | 1647 | drm_atomic_state_clear(state); |
6f75cea6 | 1648 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1649 | |
1650 | goto retry; | |
1651 | } | |
1652 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
1653 | ||
1654 | /** | |
7f50002f | 1655 | * drm_atomic_helper_plane_set_property - helper for plane properties |
042652ed DV |
1656 | * @plane: DRM plane |
1657 | * @property: DRM property | |
1658 | * @val: value of property | |
1659 | * | |
7f50002f LP |
1660 | * Provides a default plane set_property handler using the atomic driver |
1661 | * interface. | |
042652ed DV |
1662 | * |
1663 | * RETURNS: | |
1664 | * Zero on success, error code on failure | |
1665 | */ | |
1666 | int | |
1667 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
1668 | struct drm_property *property, | |
1669 | uint64_t val) | |
1670 | { | |
1671 | struct drm_atomic_state *state; | |
1672 | struct drm_plane_state *plane_state; | |
1673 | int ret = 0; | |
1674 | ||
1675 | state = drm_atomic_state_alloc(plane->dev); | |
1676 | if (!state) | |
1677 | return -ENOMEM; | |
1678 | ||
1679 | /* ->set_property is always called with all locks held. */ | |
1680 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
1681 | retry: | |
1682 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1683 | if (IS_ERR(plane_state)) { | |
1684 | ret = PTR_ERR(plane_state); | |
1685 | goto fail; | |
1686 | } | |
1687 | ||
40ecc694 RC |
1688 | ret = drm_atomic_plane_set_property(plane, plane_state, |
1689 | property, val); | |
042652ed DV |
1690 | if (ret) |
1691 | goto fail; | |
1692 | ||
1693 | ret = drm_atomic_commit(state); | |
1694 | if (ret != 0) | |
1695 | goto fail; | |
1696 | ||
1697 | /* Driver takes ownership of state on successful commit. */ | |
1698 | return 0; | |
1699 | fail: | |
1700 | if (ret == -EDEADLK) | |
1701 | goto backoff; | |
1702 | ||
1703 | drm_atomic_state_free(state); | |
1704 | ||
1705 | return ret; | |
1706 | backoff: | |
042652ed | 1707 | drm_atomic_state_clear(state); |
6f75cea6 | 1708 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1709 | |
1710 | goto retry; | |
1711 | } | |
1712 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
1713 | ||
1714 | /** | |
7f50002f | 1715 | * drm_atomic_helper_connector_set_property - helper for connector properties |
042652ed DV |
1716 | * @connector: DRM connector |
1717 | * @property: DRM property | |
1718 | * @val: value of property | |
1719 | * | |
7f50002f LP |
1720 | * Provides a default connector set_property handler using the atomic driver |
1721 | * interface. | |
042652ed DV |
1722 | * |
1723 | * RETURNS: | |
1724 | * Zero on success, error code on failure | |
1725 | */ | |
1726 | int | |
1727 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
1728 | struct drm_property *property, | |
1729 | uint64_t val) | |
1730 | { | |
1731 | struct drm_atomic_state *state; | |
1732 | struct drm_connector_state *connector_state; | |
1733 | int ret = 0; | |
1734 | ||
1735 | state = drm_atomic_state_alloc(connector->dev); | |
1736 | if (!state) | |
1737 | return -ENOMEM; | |
1738 | ||
1739 | /* ->set_property is always called with all locks held. */ | |
1740 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
1741 | retry: | |
1742 | connector_state = drm_atomic_get_connector_state(state, connector); | |
1743 | if (IS_ERR(connector_state)) { | |
1744 | ret = PTR_ERR(connector_state); | |
1745 | goto fail; | |
1746 | } | |
1747 | ||
40ecc694 RC |
1748 | ret = drm_atomic_connector_set_property(connector, connector_state, |
1749 | property, val); | |
042652ed DV |
1750 | if (ret) |
1751 | goto fail; | |
1752 | ||
1753 | ret = drm_atomic_commit(state); | |
1754 | if (ret != 0) | |
1755 | goto fail; | |
1756 | ||
1757 | /* Driver takes ownership of state on successful commit. */ | |
1758 | return 0; | |
1759 | fail: | |
1760 | if (ret == -EDEADLK) | |
1761 | goto backoff; | |
1762 | ||
1763 | drm_atomic_state_free(state); | |
1764 | ||
1765 | return ret; | |
1766 | backoff: | |
042652ed | 1767 | drm_atomic_state_clear(state); |
6f75cea6 | 1768 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1769 | |
1770 | goto retry; | |
1771 | } | |
1772 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 DV |
1773 | |
1774 | /** | |
1775 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
1776 | * @crtc: DRM crtc | |
1777 | * @fb: DRM framebuffer | |
1778 | * @event: optional DRM event to signal upon completion | |
1779 | * @flags: flip flags for non-vblank sync'ed updates | |
1780 | * | |
1781 | * Provides a default page flip implementation using the atomic driver interface. | |
1782 | * | |
1783 | * Note that for now so called async page flips (i.e. updates which are not | |
1784 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
1785 | * no provisions for this yet. | |
1786 | * | |
1787 | * Returns: | |
1788 | * Returns 0 on success, negative errno numbers on failure. | |
1789 | */ | |
1790 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
1791 | struct drm_framebuffer *fb, | |
1792 | struct drm_pending_vblank_event *event, | |
1793 | uint32_t flags) | |
1794 | { | |
1795 | struct drm_plane *plane = crtc->primary; | |
1796 | struct drm_atomic_state *state; | |
1797 | struct drm_plane_state *plane_state; | |
1798 | struct drm_crtc_state *crtc_state; | |
1799 | int ret = 0; | |
1800 | ||
1801 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
1802 | return -EINVAL; | |
1803 | ||
1804 | state = drm_atomic_state_alloc(plane->dev); | |
1805 | if (!state) | |
1806 | return -ENOMEM; | |
1807 | ||
1808 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1809 | retry: | |
1810 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1811 | if (IS_ERR(crtc_state)) { | |
1812 | ret = PTR_ERR(crtc_state); | |
1813 | goto fail; | |
1814 | } | |
1815 | crtc_state->event = event; | |
1816 | ||
1817 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1818 | if (IS_ERR(plane_state)) { | |
1819 | ret = PTR_ERR(plane_state); | |
1820 | goto fail; | |
1821 | } | |
1822 | ||
07cc0ef6 | 1823 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
8bc0f312 DV |
1824 | if (ret != 0) |
1825 | goto fail; | |
321ebf04 | 1826 | drm_atomic_set_fb_for_plane(plane_state, fb); |
8bc0f312 DV |
1827 | |
1828 | ret = drm_atomic_async_commit(state); | |
1829 | if (ret != 0) | |
1830 | goto fail; | |
1831 | ||
1832 | /* TODO: ->page_flip is the only driver callback where the core | |
1833 | * doesn't update plane->fb. For now patch it up here. */ | |
1834 | plane->fb = plane->state->fb; | |
1835 | ||
1836 | /* Driver takes ownership of state on successful async commit. */ | |
1837 | return 0; | |
1838 | fail: | |
1839 | if (ret == -EDEADLK) | |
1840 | goto backoff; | |
1841 | ||
1842 | drm_atomic_state_free(state); | |
1843 | ||
1844 | return ret; | |
1845 | backoff: | |
8bc0f312 | 1846 | drm_atomic_state_clear(state); |
6f75cea6 | 1847 | drm_atomic_legacy_backoff(state); |
8bc0f312 DV |
1848 | |
1849 | /* | |
1850 | * Someone might have exchanged the framebuffer while we dropped locks | |
1851 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1852 | * core does for us. | |
1853 | */ | |
1854 | plane->old_fb = plane->fb; | |
1855 | ||
1856 | goto retry; | |
1857 | } | |
1858 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
d461701c | 1859 | |
b486e0e6 DV |
1860 | /** |
1861 | * drm_atomic_helper_connector_dpms() - connector dpms helper implementation | |
1862 | * @connector: affected connector | |
1863 | * @mode: DPMS mode | |
1864 | * | |
1865 | * This is the main helper function provided by the atomic helper framework for | |
1866 | * implementing the legacy DPMS connector interface. It computes the new desired | |
1867 | * ->active state for the corresponding CRTC (if the connector is enabled) and | |
1868 | * updates it. | |
1869 | */ | |
1870 | void drm_atomic_helper_connector_dpms(struct drm_connector *connector, | |
1871 | int mode) | |
1872 | { | |
1873 | struct drm_mode_config *config = &connector->dev->mode_config; | |
1874 | struct drm_atomic_state *state; | |
1875 | struct drm_crtc_state *crtc_state; | |
1876 | struct drm_crtc *crtc; | |
1877 | struct drm_connector *tmp_connector; | |
1878 | int ret; | |
1879 | bool active = false; | |
1880 | ||
1881 | if (mode != DRM_MODE_DPMS_ON) | |
1882 | mode = DRM_MODE_DPMS_OFF; | |
1883 | ||
1884 | connector->dpms = mode; | |
1885 | crtc = connector->state->crtc; | |
1886 | ||
1887 | if (!crtc) | |
1888 | return; | |
1889 | ||
1890 | /* FIXME: ->dpms has no return value so can't forward the -ENOMEM. */ | |
1891 | state = drm_atomic_state_alloc(connector->dev); | |
1892 | if (!state) | |
1893 | return; | |
1894 | ||
1895 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1896 | retry: | |
1897 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1898 | if (IS_ERR(crtc_state)) | |
1899 | return; | |
1900 | ||
1901 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
1902 | ||
1903 | list_for_each_entry(tmp_connector, &config->connector_list, head) { | |
0388df05 | 1904 | if (tmp_connector->state->crtc != crtc) |
b486e0e6 DV |
1905 | continue; |
1906 | ||
0388df05 | 1907 | if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { |
b486e0e6 DV |
1908 | active = true; |
1909 | break; | |
1910 | } | |
1911 | } | |
1912 | crtc_state->active = active; | |
1913 | ||
1914 | ret = drm_atomic_commit(state); | |
1915 | if (ret != 0) | |
1916 | goto fail; | |
1917 | ||
1918 | /* Driver takes ownership of state on successful async commit. */ | |
1919 | return; | |
1920 | fail: | |
1921 | if (ret == -EDEADLK) | |
1922 | goto backoff; | |
1923 | ||
1924 | drm_atomic_state_free(state); | |
1925 | ||
1926 | WARN(1, "Driver bug: Changing ->active failed with ret=%i\n", ret); | |
1927 | ||
1928 | return; | |
1929 | backoff: | |
1930 | drm_atomic_state_clear(state); | |
1931 | drm_atomic_legacy_backoff(state); | |
1932 | ||
1933 | goto retry; | |
1934 | } | |
1935 | EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); | |
1936 | ||
3150c7d0 DV |
1937 | /** |
1938 | * DOC: atomic state reset and initialization | |
1939 | * | |
1940 | * Both the drm core and the atomic helpers assume that there is always the full | |
1941 | * and correct atomic software state for all connectors, CRTCs and planes | |
1942 | * available. Which is a bit a problem on driver load and also after system | |
1943 | * suspend. One way to solve this is to have a hardware state read-out | |
1944 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
1945 | * driver). | |
1946 | * | |
1947 | * The simpler solution is to just reset the software state to everything off, | |
1948 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
1949 | * the atomic helpers provide default reset implementations for all hooks. | |
1950 | */ | |
1951 | ||
d461701c DV |
1952 | /** |
1953 | * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs | |
1954 | * @crtc: drm CRTC | |
1955 | * | |
1956 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
1957 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
1958 | */ | |
1959 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
1960 | { | |
1961 | kfree(crtc->state); | |
1962 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
07cc0ef6 DV |
1963 | |
1964 | if (crtc->state) | |
1965 | crtc->state->crtc = crtc; | |
d461701c DV |
1966 | } |
1967 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
1968 | ||
f5e7840b TR |
1969 | /** |
1970 | * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state | |
1971 | * @crtc: CRTC object | |
1972 | * @state: atomic CRTC state | |
1973 | * | |
1974 | * Copies atomic state from a CRTC's current state and resets inferred values. | |
1975 | * This is useful for drivers that subclass the CRTC state. | |
1976 | */ | |
1977 | void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc, | |
1978 | struct drm_crtc_state *state) | |
1979 | { | |
1980 | memcpy(state, crtc->state, sizeof(*state)); | |
1981 | ||
1982 | state->mode_changed = false; | |
1983 | state->active_changed = false; | |
1984 | state->planes_changed = false; | |
1985 | state->event = NULL; | |
1986 | } | |
1987 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state); | |
1988 | ||
d461701c DV |
1989 | /** |
1990 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
1991 | * @crtc: drm CRTC | |
1992 | * | |
1993 | * Default CRTC state duplicate hook for drivers which don't have their own | |
1994 | * subclassed CRTC state structure. | |
1995 | */ | |
1996 | struct drm_crtc_state * | |
1997 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
1998 | { | |
1999 | struct drm_crtc_state *state; | |
2000 | ||
2001 | if (WARN_ON(!crtc->state)) | |
2002 | return NULL; | |
2003 | ||
f5e7840b TR |
2004 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2005 | if (state) | |
2006 | __drm_atomic_helper_crtc_duplicate_state(crtc, state); | |
d461701c DV |
2007 | |
2008 | return state; | |
2009 | } | |
2010 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
2011 | ||
f5e7840b TR |
2012 | /** |
2013 | * __drm_atomic_helper_crtc_destroy_state - release CRTC state | |
2014 | * @crtc: CRTC object | |
2015 | * @state: CRTC state object to release | |
2016 | * | |
2017 | * Releases all resources stored in the CRTC state without actually freeing | |
2018 | * the memory of the CRTC state. This is useful for drivers that subclass the | |
2019 | * CRTC state. | |
2020 | */ | |
2021 | void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
2022 | struct drm_crtc_state *state) | |
2023 | { | |
2024 | /* | |
2025 | * This is currently a placeholder so that drivers that subclass the | |
2026 | * state will automatically do the right thing if code is ever added | |
2027 | * to this function. | |
2028 | */ | |
2029 | } | |
2030 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); | |
2031 | ||
d461701c DV |
2032 | /** |
2033 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
2034 | * @crtc: drm CRTC | |
2035 | * @state: CRTC state object to release | |
2036 | * | |
2037 | * Default CRTC state destroy hook for drivers which don't have their own | |
2038 | * subclassed CRTC state structure. | |
2039 | */ | |
2040 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
2041 | struct drm_crtc_state *state) | |
2042 | { | |
f5e7840b | 2043 | __drm_atomic_helper_crtc_destroy_state(crtc, state); |
d461701c DV |
2044 | kfree(state); |
2045 | } | |
2046 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
2047 | ||
2048 | /** | |
2049 | * drm_atomic_helper_plane_reset - default ->reset hook for planes | |
2050 | * @plane: drm plane | |
2051 | * | |
2052 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
2053 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2054 | */ | |
2055 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
2056 | { | |
321ebf04 DV |
2057 | if (plane->state && plane->state->fb) |
2058 | drm_framebuffer_unreference(plane->state->fb); | |
2059 | ||
d461701c DV |
2060 | kfree(plane->state); |
2061 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
07cc0ef6 DV |
2062 | |
2063 | if (plane->state) | |
2064 | plane->state->plane = plane; | |
d461701c DV |
2065 | } |
2066 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
2067 | ||
f5e7840b TR |
2068 | /** |
2069 | * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state | |
2070 | * @plane: plane object | |
2071 | * @state: atomic plane state | |
2072 | * | |
2073 | * Copies atomic state from a plane's current state. This is useful for | |
2074 | * drivers that subclass the plane state. | |
2075 | */ | |
2076 | void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane, | |
2077 | struct drm_plane_state *state) | |
2078 | { | |
2079 | memcpy(state, plane->state, sizeof(*state)); | |
2080 | ||
2081 | if (state->fb) | |
2082 | drm_framebuffer_reference(state->fb); | |
2083 | } | |
2084 | EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state); | |
2085 | ||
d461701c DV |
2086 | /** |
2087 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
2088 | * @plane: drm plane | |
2089 | * | |
2090 | * Default plane state duplicate hook for drivers which don't have their own | |
2091 | * subclassed plane state structure. | |
2092 | */ | |
2093 | struct drm_plane_state * | |
2094 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
2095 | { | |
321ebf04 DV |
2096 | struct drm_plane_state *state; |
2097 | ||
d461701c DV |
2098 | if (WARN_ON(!plane->state)) |
2099 | return NULL; | |
2100 | ||
f5e7840b TR |
2101 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2102 | if (state) | |
2103 | __drm_atomic_helper_plane_duplicate_state(plane, state); | |
321ebf04 DV |
2104 | |
2105 | return state; | |
d461701c DV |
2106 | } |
2107 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
2108 | ||
f5e7840b TR |
2109 | /** |
2110 | * __drm_atomic_helper_plane_destroy_state - release plane state | |
2111 | * @plane: plane object | |
2112 | * @state: plane state object to release | |
2113 | * | |
2114 | * Releases all resources stored in the plane state without actually freeing | |
2115 | * the memory of the plane state. This is useful for drivers that subclass the | |
2116 | * plane state. | |
2117 | */ | |
2118 | void __drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
2119 | struct drm_plane_state *state) | |
2120 | { | |
2121 | if (state->fb) | |
2122 | drm_framebuffer_unreference(state->fb); | |
2123 | } | |
2124 | EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state); | |
2125 | ||
d461701c DV |
2126 | /** |
2127 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
2128 | * @plane: drm plane | |
2129 | * @state: plane state object to release | |
2130 | * | |
2131 | * Default plane state destroy hook for drivers which don't have their own | |
2132 | * subclassed plane state structure. | |
2133 | */ | |
2134 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
321ebf04 | 2135 | struct drm_plane_state *state) |
d461701c | 2136 | { |
f5e7840b | 2137 | __drm_atomic_helper_plane_destroy_state(plane, state); |
d461701c DV |
2138 | kfree(state); |
2139 | } | |
2140 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
2141 | ||
2142 | /** | |
2143 | * drm_atomic_helper_connector_reset - default ->reset hook for connectors | |
2144 | * @connector: drm connector | |
2145 | * | |
2146 | * Resets the atomic state for @connector by freeing the state pointer (which | |
2147 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
2148 | * object. | |
2149 | */ | |
2150 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
2151 | { | |
2152 | kfree(connector->state); | |
2153 | connector->state = kzalloc(sizeof(*connector->state), GFP_KERNEL); | |
07cc0ef6 DV |
2154 | |
2155 | if (connector->state) | |
2156 | connector->state->connector = connector; | |
d461701c DV |
2157 | } |
2158 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
2159 | ||
f5e7840b TR |
2160 | /** |
2161 | * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state | |
2162 | * @connector: connector object | |
2163 | * @state: atomic connector state | |
2164 | * | |
2165 | * Copies atomic state from a connector's current state. This is useful for | |
2166 | * drivers that subclass the connector state. | |
2167 | */ | |
2168 | void | |
2169 | __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector, | |
2170 | struct drm_connector_state *state) | |
2171 | { | |
2172 | memcpy(state, connector->state, sizeof(*state)); | |
2173 | } | |
2174 | EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state); | |
2175 | ||
d461701c DV |
2176 | /** |
2177 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
2178 | * @connector: drm connector | |
2179 | * | |
2180 | * Default connector state duplicate hook for drivers which don't have their own | |
2181 | * subclassed connector state structure. | |
2182 | */ | |
2183 | struct drm_connector_state * | |
2184 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
2185 | { | |
f5e7840b TR |
2186 | struct drm_connector_state *state; |
2187 | ||
d461701c DV |
2188 | if (WARN_ON(!connector->state)) |
2189 | return NULL; | |
2190 | ||
f5e7840b TR |
2191 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2192 | if (state) | |
2193 | __drm_atomic_helper_connector_duplicate_state(connector, state); | |
2194 | ||
2195 | return state; | |
d461701c DV |
2196 | } |
2197 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
2198 | ||
f5e7840b TR |
2199 | /** |
2200 | * __drm_atomic_helper_connector_destroy_state - release connector state | |
2201 | * @connector: connector object | |
2202 | * @state: connector state object to release | |
2203 | * | |
2204 | * Releases all resources stored in the connector state without actually | |
2205 | * freeing the memory of the connector state. This is useful for drivers that | |
2206 | * subclass the connector state. | |
2207 | */ | |
2208 | void | |
2209 | __drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
2210 | struct drm_connector_state *state) | |
2211 | { | |
2212 | /* | |
2213 | * This is currently a placeholder so that drivers that subclass the | |
2214 | * state will automatically do the right thing if code is ever added | |
2215 | * to this function. | |
2216 | */ | |
2217 | } | |
2218 | EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state); | |
2219 | ||
d461701c DV |
2220 | /** |
2221 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
2222 | * @connector: drm connector | |
2223 | * @state: connector state object to release | |
2224 | * | |
2225 | * Default connector state destroy hook for drivers which don't have their own | |
2226 | * subclassed connector state structure. | |
2227 | */ | |
2228 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
2229 | struct drm_connector_state *state) | |
2230 | { | |
f5e7840b | 2231 | __drm_atomic_helper_connector_destroy_state(connector, state); |
d461701c DV |
2232 | kfree(state); |
2233 | } | |
2234 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); |