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 | ||
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 | ||
9a9f5ce8 | 92 | drm_for_each_connector(connector, dev) { |
623369e5 DV |
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 | ||
fc596660 | 127 | crtc_state->connectors_changed = true; |
623369e5 DV |
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]; | |
fc596660 | 177 | crtc_state->connectors_changed = true; |
623369e5 DV |
178 | } |
179 | ||
180 | if (connector_state->crtc) { | |
181 | idx = drm_crtc_index(connector_state->crtc); | |
182 | ||
183 | crtc_state = state->crtc_states[idx]; | |
fc596660 | 184 | crtc_state->connectors_changed = true; |
623369e5 DV |
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; | |
3b8a684b DV |
199 | |
200 | if (funcs->atomic_best_encoder) | |
201 | new_encoder = funcs->atomic_best_encoder(connector, | |
202 | connector_state); | |
203 | else | |
204 | new_encoder = funcs->best_encoder(connector); | |
623369e5 DV |
205 | |
206 | if (!new_encoder) { | |
17a38d9c DV |
207 | DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", |
208 | connector->base.id, | |
209 | connector->name); | |
623369e5 DV |
210 | return -EINVAL; |
211 | } | |
212 | ||
213 | if (new_encoder == connector_state->best_encoder) { | |
17a38d9c DV |
214 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d]\n", |
215 | connector->base.id, | |
216 | connector->name, | |
217 | new_encoder->base.id, | |
218 | new_encoder->name, | |
219 | connector_state->crtc->base.id); | |
623369e5 DV |
220 | |
221 | return 0; | |
222 | } | |
223 | ||
224 | encoder_crtc = get_current_crtc_for_encoder(state->dev, | |
225 | new_encoder); | |
226 | ||
227 | if (encoder_crtc) { | |
228 | ret = steal_encoder(state, new_encoder, encoder_crtc); | |
229 | if (ret) { | |
17a38d9c DV |
230 | DRM_DEBUG_ATOMIC("Encoder stealing failed for [CONNECTOR:%d:%s]\n", |
231 | connector->base.id, | |
232 | connector->name); | |
623369e5 DV |
233 | return ret; |
234 | } | |
235 | } | |
236 | ||
6ea76f3c DV |
237 | if (WARN_ON(!connector_state->crtc)) |
238 | return -EINVAL; | |
239 | ||
623369e5 DV |
240 | connector_state->best_encoder = new_encoder; |
241 | idx = drm_crtc_index(connector_state->crtc); | |
242 | ||
243 | crtc_state = state->crtc_states[idx]; | |
fc596660 | 244 | crtc_state->connectors_changed = true; |
623369e5 | 245 | |
17a38d9c DV |
246 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d]\n", |
247 | connector->base.id, | |
248 | connector->name, | |
249 | new_encoder->base.id, | |
250 | new_encoder->name, | |
251 | connector_state->crtc->base.id); | |
623369e5 DV |
252 | |
253 | return 0; | |
254 | } | |
255 | ||
256 | static int | |
257 | mode_fixup(struct drm_atomic_state *state) | |
258 | { | |
df63b999 | 259 | struct drm_crtc *crtc; |
623369e5 | 260 | struct drm_crtc_state *crtc_state; |
df63b999 | 261 | struct drm_connector *connector; |
623369e5 DV |
262 | struct drm_connector_state *conn_state; |
263 | int i; | |
264 | bool ret; | |
265 | ||
df63b999 | 266 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
fc596660 ML |
267 | if (!crtc_state->mode_changed && |
268 | !crtc_state->connectors_changed) | |
623369e5 DV |
269 | continue; |
270 | ||
271 | drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); | |
272 | } | |
273 | ||
df63b999 | 274 | for_each_connector_in_state(state, connector, conn_state, i) { |
b5ceff20 | 275 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
276 | struct drm_encoder *encoder; |
277 | ||
623369e5 DV |
278 | WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); |
279 | ||
280 | if (!conn_state->crtc || !conn_state->best_encoder) | |
281 | continue; | |
282 | ||
283 | crtc_state = | |
284 | state->crtc_states[drm_crtc_index(conn_state->crtc)]; | |
285 | ||
286 | /* | |
287 | * Each encoder has at most one connector (since we always steal | |
288 | * it away), so we won't call ->mode_fixup twice. | |
289 | */ | |
290 | encoder = conn_state->best_encoder; | |
291 | funcs = encoder->helper_private; | |
840bfe95 ACO |
292 | if (!funcs) |
293 | continue; | |
623369e5 | 294 | |
862e686c AT |
295 | ret = drm_bridge_mode_fixup(encoder->bridge, &crtc_state->mode, |
296 | &crtc_state->adjusted_mode); | |
297 | if (!ret) { | |
298 | DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); | |
299 | return -EINVAL; | |
623369e5 DV |
300 | } |
301 | ||
4cd4df80 TR |
302 | if (funcs->atomic_check) { |
303 | ret = funcs->atomic_check(encoder, crtc_state, | |
304 | conn_state); | |
305 | if (ret) { | |
17a38d9c DV |
306 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", |
307 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
308 | return ret; |
309 | } | |
84524917 | 310 | } else if (funcs->mode_fixup) { |
4cd4df80 TR |
311 | ret = funcs->mode_fixup(encoder, &crtc_state->mode, |
312 | &crtc_state->adjusted_mode); | |
313 | if (!ret) { | |
17a38d9c DV |
314 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", |
315 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
316 | return -EINVAL; |
317 | } | |
623369e5 DV |
318 | } |
319 | } | |
320 | ||
df63b999 | 321 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 322 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 323 | |
fc596660 ML |
324 | if (!crtc_state->mode_changed && |
325 | !crtc_state->connectors_changed) | |
623369e5 DV |
326 | continue; |
327 | ||
328 | funcs = crtc->helper_private; | |
840bfe95 ACO |
329 | if (!funcs->mode_fixup) |
330 | continue; | |
331 | ||
623369e5 DV |
332 | ret = funcs->mode_fixup(crtc, &crtc_state->mode, |
333 | &crtc_state->adjusted_mode); | |
334 | if (!ret) { | |
17a38d9c DV |
335 | DRM_DEBUG_ATOMIC("[CRTC:%d] fixup failed\n", |
336 | crtc->base.id); | |
623369e5 DV |
337 | return -EINVAL; |
338 | } | |
339 | } | |
340 | ||
341 | return 0; | |
342 | } | |
343 | ||
d9b13620 | 344 | /** |
f98bd3ef | 345 | * drm_atomic_helper_check_modeset - validate state object for modeset changes |
d9b13620 DV |
346 | * @dev: DRM device |
347 | * @state: the driver state object | |
348 | * | |
349 | * Check the state object to see if the requested state is physically possible. | |
350 | * This does all the crtc and connector related computations for an atomic | |
fc596660 ML |
351 | * update and adds any additional connectors needed for full modesets and calls |
352 | * down into ->mode_fixup functions of the driver backend. | |
353 | * | |
354 | * crtc_state->mode_changed is set when the input mode is changed. | |
355 | * crtc_state->connectors_changed is set when a connector is added or | |
356 | * removed from the crtc. | |
357 | * crtc_state->active_changed is set when crtc_state->active changes, | |
358 | * which is used for dpms. | |
d9b13620 DV |
359 | * |
360 | * IMPORTANT: | |
361 | * | |
362 | * Drivers which update ->mode_changed (e.g. in their ->atomic_check hooks if a | |
363 | * plane update can't be done without a full modeset) _must_ call this function | |
364 | * afterwards after that change. It is permitted to call this function multiple | |
365 | * times for the same update, e.g. when the ->atomic_check functions depend upon | |
366 | * the adjusted dotclock for fifo space allocation and watermark computation. | |
367 | * | |
368 | * RETURNS | |
369 | * Zero for success or -errno | |
370 | */ | |
371 | int | |
934ce1c2 | 372 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
373 | struct drm_atomic_state *state) |
374 | { | |
623369e5 DV |
375 | struct drm_crtc *crtc; |
376 | struct drm_crtc_state *crtc_state; | |
df63b999 ACO |
377 | struct drm_connector *connector; |
378 | struct drm_connector_state *connector_state; | |
623369e5 DV |
379 | int i, ret; |
380 | ||
df63b999 | 381 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 | 382 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { |
17a38d9c DV |
383 | DRM_DEBUG_ATOMIC("[CRTC:%d] mode changed\n", |
384 | crtc->base.id); | |
623369e5 DV |
385 | crtc_state->mode_changed = true; |
386 | } | |
387 | ||
388 | if (crtc->state->enable != crtc_state->enable) { | |
17a38d9c DV |
389 | DRM_DEBUG_ATOMIC("[CRTC:%d] enable changed\n", |
390 | crtc->base.id); | |
fc596660 ML |
391 | |
392 | /* | |
393 | * For clarity this assignment is done here, but | |
394 | * enable == 0 is only true when there are no | |
395 | * connectors and a NULL mode. | |
396 | * | |
397 | * The other way around is true as well. enable != 0 | |
398 | * iff connectors are attached and a mode is set. | |
399 | */ | |
623369e5 | 400 | crtc_state->mode_changed = true; |
fc596660 | 401 | crtc_state->connectors_changed = true; |
623369e5 DV |
402 | } |
403 | } | |
404 | ||
df63b999 | 405 | for_each_connector_in_state(state, connector, connector_state, i) { |
623369e5 DV |
406 | /* |
407 | * This only sets crtc->mode_changed for routing changes, | |
408 | * drivers must set crtc->mode_changed themselves when connector | |
409 | * properties need to be updated. | |
410 | */ | |
411 | ret = update_connector_routing(state, i); | |
412 | if (ret) | |
413 | return ret; | |
414 | } | |
415 | ||
416 | /* | |
417 | * After all the routing has been prepared we need to add in any | |
418 | * connector which is itself unchanged, but who's crtc changes it's | |
419 | * configuration. This must be done before calling mode_fixup in case a | |
420 | * crtc only changed its mode but has the same set of connectors. | |
421 | */ | |
df63b999 | 422 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 DV |
423 | int num_connectors; |
424 | ||
eab3bbef DV |
425 | /* |
426 | * We must set ->active_changed after walking connectors for | |
427 | * otherwise an update that only changes active would result in | |
428 | * a full modeset because update_connector_routing force that. | |
429 | */ | |
430 | if (crtc->state->active != crtc_state->active) { | |
17a38d9c DV |
431 | DRM_DEBUG_ATOMIC("[CRTC:%d] active changed\n", |
432 | crtc->base.id); | |
eab3bbef DV |
433 | crtc_state->active_changed = true; |
434 | } | |
435 | ||
2465ff62 | 436 | if (!drm_atomic_crtc_needs_modeset(crtc_state)) |
623369e5 DV |
437 | continue; |
438 | ||
17a38d9c DV |
439 | DRM_DEBUG_ATOMIC("[CRTC:%d] needs all connectors, enable: %c, active: %c\n", |
440 | crtc->base.id, | |
441 | crtc_state->enable ? 'y' : 'n', | |
eab3bbef | 442 | crtc_state->active ? 'y' : 'n'); |
623369e5 DV |
443 | |
444 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
445 | if (ret != 0) | |
446 | return ret; | |
447 | ||
57744aa7 ML |
448 | ret = drm_atomic_add_affected_planes(state, crtc); |
449 | if (ret != 0) | |
450 | return ret; | |
451 | ||
623369e5 DV |
452 | num_connectors = drm_atomic_connectors_for_crtc(state, |
453 | crtc); | |
454 | ||
455 | if (crtc_state->enable != !!num_connectors) { | |
17a38d9c DV |
456 | DRM_DEBUG_ATOMIC("[CRTC:%d] enabled/connectors mismatch\n", |
457 | crtc->base.id); | |
623369e5 DV |
458 | |
459 | return -EINVAL; | |
460 | } | |
461 | } | |
462 | ||
463 | return mode_fixup(state); | |
464 | } | |
d9b13620 | 465 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 466 | |
c2fcd274 | 467 | /** |
f98bd3ef | 468 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
469 | * @dev: DRM device |
470 | * @state: the driver state object | |
471 | * | |
472 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 DV |
473 | * This does all the plane update related checks using by calling into the |
474 | * ->atomic_check hooks provided by the driver. | |
c2fcd274 | 475 | * |
fc596660 ML |
476 | * It also sets crtc_state->planes_changed to indicate that a crtc has |
477 | * updated planes. | |
478 | * | |
c2fcd274 DV |
479 | * RETURNS |
480 | * Zero for success or -errno | |
481 | */ | |
d9b13620 DV |
482 | int |
483 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
484 | struct drm_atomic_state *state) | |
c2fcd274 | 485 | { |
df63b999 ACO |
486 | struct drm_crtc *crtc; |
487 | struct drm_crtc_state *crtc_state; | |
488 | struct drm_plane *plane; | |
489 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
490 | int i, ret = 0; |
491 | ||
df63b999 | 492 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 493 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
494 | |
495 | funcs = plane->helper_private; | |
496 | ||
497 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
498 | ||
499 | if (!funcs || !funcs->atomic_check) | |
500 | continue; | |
501 | ||
502 | ret = funcs->atomic_check(plane, plane_state); | |
503 | if (ret) { | |
17a38d9c DV |
504 | DRM_DEBUG_ATOMIC("[PLANE:%d] atomic driver check failed\n", |
505 | plane->base.id); | |
c2fcd274 DV |
506 | return ret; |
507 | } | |
508 | } | |
509 | ||
df63b999 | 510 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 511 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
512 | |
513 | funcs = crtc->helper_private; | |
514 | ||
515 | if (!funcs || !funcs->atomic_check) | |
516 | continue; | |
517 | ||
518 | ret = funcs->atomic_check(crtc, state->crtc_states[i]); | |
519 | if (ret) { | |
17a38d9c DV |
520 | DRM_DEBUG_ATOMIC("[CRTC:%d] atomic driver check failed\n", |
521 | crtc->base.id); | |
c2fcd274 DV |
522 | return ret; |
523 | } | |
524 | } | |
525 | ||
d9b13620 DV |
526 | return ret; |
527 | } | |
528 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
529 | ||
530 | /** | |
531 | * drm_atomic_helper_check - validate state object | |
532 | * @dev: DRM device | |
533 | * @state: the driver state object | |
534 | * | |
535 | * Check the state object to see if the requested state is physically possible. | |
536 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
537 | * checking that a driver needs it can simply wrap that around this function. | |
538 | * Drivers without such needs can directly use this as their ->atomic_check() | |
539 | * callback. | |
540 | * | |
b4274fbe DV |
541 | * This just wraps the two parts of the state checking for planes and modeset |
542 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
543 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
544 | * ->atomic_check functions depend upon an updated adjusted_mode.clock to | |
545 | * e.g. properly compute watermarks. | |
546 | * | |
d9b13620 DV |
547 | * RETURNS |
548 | * Zero for success or -errno | |
549 | */ | |
550 | int drm_atomic_helper_check(struct drm_device *dev, | |
551 | struct drm_atomic_state *state) | |
552 | { | |
553 | int ret; | |
554 | ||
b4274fbe | 555 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
556 | if (ret) |
557 | return ret; | |
558 | ||
b4274fbe | 559 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
560 | if (ret) |
561 | return ret; | |
562 | ||
c2fcd274 DV |
563 | return ret; |
564 | } | |
565 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
566 | ||
623369e5 DV |
567 | static void |
568 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
569 | { | |
df63b999 ACO |
570 | struct drm_connector *connector; |
571 | struct drm_connector_state *old_conn_state; | |
572 | struct drm_crtc *crtc; | |
573 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
574 | int i; |
575 | ||
df63b999 | 576 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 577 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 578 | struct drm_encoder *encoder; |
eab3bbef | 579 | struct drm_crtc_state *old_crtc_state; |
623369e5 | 580 | |
623369e5 DV |
581 | /* Shut down everything that's in the changeset and currently |
582 | * still on. So need to check the old, saved state. */ | |
df63b999 | 583 | if (!old_conn_state->crtc) |
623369e5 DV |
584 | continue; |
585 | ||
eab3bbef DV |
586 | old_crtc_state = old_state->crtc_states[drm_crtc_index(old_conn_state->crtc)]; |
587 | ||
4218a32f | 588 | if (!old_crtc_state->active || |
2465ff62 | 589 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) |
eab3bbef DV |
590 | continue; |
591 | ||
46df9adb | 592 | encoder = old_conn_state->best_encoder; |
623369e5 | 593 | |
46df9adb RC |
594 | /* We shouldn't get this far if we didn't previously have |
595 | * an encoder.. but WARN_ON() rather than explode. | |
596 | */ | |
597 | if (WARN_ON(!encoder)) | |
623369e5 DV |
598 | continue; |
599 | ||
600 | funcs = encoder->helper_private; | |
601 | ||
17a38d9c DV |
602 | DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
603 | encoder->base.id, encoder->name); | |
95d6eb3b | 604 | |
623369e5 DV |
605 | /* |
606 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 607 | * it away), so we won't call disable hooks twice. |
623369e5 | 608 | */ |
862e686c | 609 | drm_bridge_disable(encoder->bridge); |
623369e5 DV |
610 | |
611 | /* Right function depends upon target state. */ | |
ee0a89cf | 612 | if (connector->state->crtc && funcs->prepare) |
623369e5 DV |
613 | funcs->prepare(encoder); |
614 | else if (funcs->disable) | |
615 | funcs->disable(encoder); | |
616 | else | |
617 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
618 | ||
862e686c | 619 | drm_bridge_post_disable(encoder->bridge); |
623369e5 DV |
620 | } |
621 | ||
df63b999 | 622 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 623 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
624 | |
625 | /* Shut down everything that needs a full modeset. */ | |
2465ff62 | 626 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
627 | continue; |
628 | ||
629 | if (!old_crtc_state->active) | |
623369e5 DV |
630 | continue; |
631 | ||
632 | funcs = crtc->helper_private; | |
633 | ||
17a38d9c DV |
634 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d]\n", |
635 | crtc->base.id); | |
95d6eb3b DV |
636 | |
637 | ||
623369e5 | 638 | /* Right function depends upon target state. */ |
ee0a89cf | 639 | if (crtc->state->enable && funcs->prepare) |
623369e5 DV |
640 | funcs->prepare(crtc); |
641 | else if (funcs->disable) | |
642 | funcs->disable(crtc); | |
643 | else | |
644 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
645 | } | |
646 | } | |
647 | ||
4c18d301 DV |
648 | /** |
649 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state | |
650 | * @dev: DRM device | |
651 | * @old_state: atomic state object with old state structures | |
652 | * | |
653 | * This function updates all the various legacy modeset state pointers in | |
654 | * connectors, encoders and crtcs. It also updates the timestamping constants | |
655 | * used for precise vblank timestamps by calling | |
656 | * drm_calc_timestamping_constants(). | |
657 | * | |
658 | * Drivers can use this for building their own atomic commit if they don't have | |
659 | * a pure helper-based modeset implementation. | |
660 | */ | |
661 | void | |
662 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, | |
663 | struct drm_atomic_state *old_state) | |
623369e5 | 664 | { |
df63b999 ACO |
665 | struct drm_connector *connector; |
666 | struct drm_connector_state *old_conn_state; | |
667 | struct drm_crtc *crtc; | |
668 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
669 | int i; |
670 | ||
8c10342c | 671 | /* clear out existing links and update dpms */ |
df63b999 | 672 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
8c10342c ML |
673 | if (connector->encoder) { |
674 | WARN_ON(!connector->encoder->crtc); | |
675 | ||
676 | connector->encoder->crtc = NULL; | |
677 | connector->encoder = NULL; | |
678 | } | |
623369e5 | 679 | |
8c10342c ML |
680 | crtc = connector->state->crtc; |
681 | if ((!crtc && old_conn_state->crtc) || | |
682 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { | |
683 | struct drm_property *dpms_prop = | |
684 | dev->mode_config.dpms_property; | |
685 | int mode = DRM_MODE_DPMS_OFF; | |
623369e5 | 686 | |
8c10342c ML |
687 | if (crtc && crtc->state->active) |
688 | mode = DRM_MODE_DPMS_ON; | |
689 | ||
690 | connector->dpms = mode; | |
691 | drm_object_property_set_value(&connector->base, | |
692 | dpms_prop, mode); | |
693 | } | |
623369e5 DV |
694 | } |
695 | ||
696 | /* set new links */ | |
df63b999 ACO |
697 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
698 | if (!connector->state->crtc) | |
623369e5 DV |
699 | continue; |
700 | ||
701 | if (WARN_ON(!connector->state->best_encoder)) | |
702 | continue; | |
703 | ||
704 | connector->encoder = connector->state->best_encoder; | |
705 | connector->encoder->crtc = connector->state->crtc; | |
706 | } | |
707 | ||
708 | /* set legacy state in the crtc structure */ | |
df63b999 | 709 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
2660801f ML |
710 | struct drm_plane *primary = crtc->primary; |
711 | ||
623369e5 DV |
712 | crtc->mode = crtc->state->mode; |
713 | crtc->enabled = crtc->state->enable; | |
2660801f ML |
714 | |
715 | if (drm_atomic_get_existing_plane_state(old_state, primary) && | |
716 | primary->state->crtc == crtc) { | |
717 | crtc->x = primary->state->src_x >> 16; | |
718 | crtc->y = primary->state->src_y >> 16; | |
719 | } | |
3d51d2d2 DV |
720 | |
721 | if (crtc->state->enable) | |
722 | drm_calc_timestamping_constants(crtc, | |
723 | &crtc->state->adjusted_mode); | |
623369e5 DV |
724 | } |
725 | } | |
4c18d301 | 726 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); |
623369e5 DV |
727 | |
728 | static void | |
729 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
730 | { | |
df63b999 ACO |
731 | struct drm_crtc *crtc; |
732 | struct drm_crtc_state *old_crtc_state; | |
733 | struct drm_connector *connector; | |
734 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
735 | int i; |
736 | ||
df63b999 | 737 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 738 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 739 | |
df63b999 | 740 | if (!crtc->state->mode_changed) |
623369e5 DV |
741 | continue; |
742 | ||
743 | funcs = crtc->helper_private; | |
744 | ||
c982bd90 | 745 | if (crtc->state->enable && funcs->mode_set_nofb) { |
17a38d9c DV |
746 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d]\n", |
747 | crtc->base.id); | |
95d6eb3b | 748 | |
623369e5 | 749 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 750 | } |
623369e5 DV |
751 | } |
752 | ||
df63b999 | 753 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 754 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 755 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
756 | struct drm_encoder *encoder; |
757 | struct drm_display_mode *mode, *adjusted_mode; | |
758 | ||
df63b999 | 759 | if (!connector->state->best_encoder) |
623369e5 DV |
760 | continue; |
761 | ||
762 | encoder = connector->state->best_encoder; | |
763 | funcs = encoder->helper_private; | |
764 | new_crtc_state = connector->state->crtc->state; | |
765 | mode = &new_crtc_state->mode; | |
766 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
767 | ||
eab3bbef DV |
768 | if (!new_crtc_state->mode_changed) |
769 | continue; | |
770 | ||
17a38d9c DV |
771 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
772 | encoder->base.id, encoder->name); | |
95d6eb3b | 773 | |
623369e5 DV |
774 | /* |
775 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 776 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 777 | */ |
c982bd90 DV |
778 | if (funcs->mode_set) |
779 | funcs->mode_set(encoder, mode, adjusted_mode); | |
623369e5 | 780 | |
862e686c | 781 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
623369e5 DV |
782 | } |
783 | } | |
784 | ||
785 | /** | |
1af434a9 | 786 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 787 | * @dev: DRM device |
a072f809 | 788 | * @old_state: atomic state object with old state structures |
623369e5 | 789 | * |
1af434a9 | 790 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 791 | * prepares them (if required) with the new mode. |
1af434a9 DV |
792 | * |
793 | * For compatability with legacy crtc helpers this should be called before | |
794 | * drm_atomic_helper_commit_planes(), which is what the default commit function | |
795 | * does. But drivers with different needs can group the modeset commits together | |
796 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
797 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 798 | */ |
1af434a9 DV |
799 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
800 | struct drm_atomic_state *old_state) | |
623369e5 | 801 | { |
a072f809 | 802 | disable_outputs(dev, old_state); |
4c18d301 DV |
803 | |
804 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); | |
805 | ||
a072f809 | 806 | crtc_set_mode(dev, old_state); |
623369e5 | 807 | } |
1af434a9 | 808 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 DV |
809 | |
810 | /** | |
1af434a9 | 811 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
812 | * @dev: DRM device |
813 | * @old_state: atomic state object with old state structures | |
814 | * | |
1af434a9 DV |
815 | * This function enables all the outputs with the new configuration which had to |
816 | * be turned off for the update. | |
817 | * | |
818 | * For compatability with legacy crtc helpers this should be called after | |
819 | * drm_atomic_helper_commit_planes(), which is what the default commit function | |
820 | * does. But drivers with different needs can group the modeset commits together | |
821 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
822 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 823 | */ |
1af434a9 DV |
824 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
825 | struct drm_atomic_state *old_state) | |
623369e5 | 826 | { |
df63b999 ACO |
827 | struct drm_crtc *crtc; |
828 | struct drm_crtc_state *old_crtc_state; | |
829 | struct drm_connector *connector; | |
830 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
831 | int i; |
832 | ||
df63b999 | 833 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 834 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
835 | |
836 | /* Need to filter out CRTCs where only planes change. */ | |
2465ff62 | 837 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
838 | continue; |
839 | ||
840 | if (!crtc->state->active) | |
623369e5 DV |
841 | continue; |
842 | ||
843 | funcs = crtc->helper_private; | |
844 | ||
ee0a89cf | 845 | if (crtc->state->enable) { |
17a38d9c DV |
846 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d]\n", |
847 | crtc->base.id); | |
95d6eb3b | 848 | |
ee0a89cf DV |
849 | if (funcs->enable) |
850 | funcs->enable(crtc); | |
851 | else | |
852 | funcs->commit(crtc); | |
853 | } | |
623369e5 DV |
854 | } |
855 | ||
df63b999 | 856 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 857 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
858 | struct drm_encoder *encoder; |
859 | ||
df63b999 | 860 | if (!connector->state->best_encoder) |
623369e5 DV |
861 | continue; |
862 | ||
4218a32f | 863 | if (!connector->state->crtc->state->active || |
2465ff62 | 864 | !drm_atomic_crtc_needs_modeset(connector->state->crtc->state)) |
eab3bbef DV |
865 | continue; |
866 | ||
623369e5 DV |
867 | encoder = connector->state->best_encoder; |
868 | funcs = encoder->helper_private; | |
869 | ||
17a38d9c DV |
870 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
871 | encoder->base.id, encoder->name); | |
95d6eb3b | 872 | |
623369e5 DV |
873 | /* |
874 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 875 | * it away), so we won't call enable hooks twice. |
623369e5 | 876 | */ |
862e686c | 877 | drm_bridge_pre_enable(encoder->bridge); |
623369e5 | 878 | |
ee0a89cf DV |
879 | if (funcs->enable) |
880 | funcs->enable(encoder); | |
881 | else | |
882 | funcs->commit(encoder); | |
623369e5 | 883 | |
862e686c | 884 | drm_bridge_enable(encoder->bridge); |
623369e5 DV |
885 | } |
886 | } | |
1af434a9 | 887 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 888 | |
e2330f07 DV |
889 | static void wait_for_fences(struct drm_device *dev, |
890 | struct drm_atomic_state *state) | |
891 | { | |
df63b999 ACO |
892 | struct drm_plane *plane; |
893 | struct drm_plane_state *plane_state; | |
e2330f07 DV |
894 | int i; |
895 | ||
df63b999 ACO |
896 | for_each_plane_in_state(state, plane, plane_state, i) { |
897 | if (!plane->state->fence) | |
e2330f07 DV |
898 | continue; |
899 | ||
900 | WARN_ON(!plane->state->fb); | |
901 | ||
902 | fence_wait(plane->state->fence, false); | |
903 | fence_put(plane->state->fence); | |
904 | plane->state->fence = NULL; | |
905 | } | |
906 | } | |
907 | ||
ab58e338 DV |
908 | static bool framebuffer_changed(struct drm_device *dev, |
909 | struct drm_atomic_state *old_state, | |
910 | struct drm_crtc *crtc) | |
911 | { | |
912 | struct drm_plane *plane; | |
913 | struct drm_plane_state *old_plane_state; | |
ab58e338 DV |
914 | int i; |
915 | ||
df63b999 | 916 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
ab58e338 DV |
917 | if (plane->state->crtc != crtc && |
918 | old_plane_state->crtc != crtc) | |
919 | continue; | |
920 | ||
921 | if (plane->state->fb != old_plane_state->fb) | |
922 | return true; | |
923 | } | |
924 | ||
925 | return false; | |
926 | } | |
927 | ||
5ee3229c RC |
928 | /** |
929 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
930 | * @dev: DRM device | |
931 | * @old_state: atomic state object with old state structures | |
932 | * | |
933 | * Helper to, after atomic commit, wait for vblanks on all effected | |
934 | * crtcs (ie. before cleaning up old framebuffers using | |
ab58e338 DV |
935 | * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
936 | * framebuffers have actually changed to optimize for the legacy cursor and | |
937 | * plane update use-case. | |
5ee3229c RC |
938 | */ |
939 | void | |
940 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
941 | struct drm_atomic_state *old_state) | |
623369e5 DV |
942 | { |
943 | struct drm_crtc *crtc; | |
944 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
945 | int i, ret; |
946 | ||
df63b999 | 947 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
623369e5 DV |
948 | /* No one cares about the old state, so abuse it for tracking |
949 | * and store whether we hold a vblank reference (and should do a | |
950 | * vblank wait) in the ->enable boolean. */ | |
951 | old_crtc_state->enable = false; | |
952 | ||
953 | if (!crtc->state->enable) | |
954 | continue; | |
955 | ||
f02ad907 DV |
956 | /* Legacy cursor ioctls are completely unsynced, and userspace |
957 | * relies on that (by doing tons of cursor updates). */ | |
958 | if (old_state->legacy_cursor_update) | |
959 | continue; | |
960 | ||
ab58e338 DV |
961 | if (!framebuffer_changed(dev, old_state, crtc)) |
962 | continue; | |
963 | ||
623369e5 DV |
964 | ret = drm_crtc_vblank_get(crtc); |
965 | if (ret != 0) | |
966 | continue; | |
967 | ||
968 | old_crtc_state->enable = true; | |
d4853630 | 969 | old_crtc_state->last_vblank_count = drm_crtc_vblank_count(crtc); |
623369e5 DV |
970 | } |
971 | ||
df63b999 ACO |
972 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
973 | if (!old_crtc_state->enable) | |
623369e5 DV |
974 | continue; |
975 | ||
976 | ret = wait_event_timeout(dev->vblank[i].queue, | |
977 | old_crtc_state->last_vblank_count != | |
d4853630 | 978 | drm_crtc_vblank_count(crtc), |
623369e5 DV |
979 | msecs_to_jiffies(50)); |
980 | ||
981 | drm_crtc_vblank_put(crtc); | |
982 | } | |
983 | } | |
5ee3229c | 984 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 DV |
985 | |
986 | /** | |
987 | * drm_atomic_helper_commit - commit validated state object | |
988 | * @dev: DRM device | |
989 | * @state: the driver state object | |
990 | * @async: asynchronous commit | |
991 | * | |
992 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
993 | * object. This can still fail when e.g. the framebuffer reservation fails. For | |
994 | * now this doesn't implement asynchronous commits. | |
995 | * | |
996 | * RETURNS | |
997 | * Zero for success or -errno. | |
998 | */ | |
999 | int drm_atomic_helper_commit(struct drm_device *dev, | |
1000 | struct drm_atomic_state *state, | |
1001 | bool async) | |
1002 | { | |
1003 | int ret; | |
1004 | ||
1005 | if (async) | |
1006 | return -EBUSY; | |
1007 | ||
1008 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
1009 | if (ret) | |
1010 | return ret; | |
1011 | ||
1012 | /* | |
1013 | * This is the point of no return - everything below never fails except | |
1014 | * when the hw goes bonghits. Which means we can commit the new state on | |
1015 | * the software side now. | |
1016 | */ | |
1017 | ||
1018 | drm_atomic_helper_swap_state(dev, state); | |
1019 | ||
1020 | /* | |
1021 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 1022 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
1023 | * that the asynchronous work has either been cancelled (if the driver |
1024 | * supports it, which at least requires that the framebuffers get | |
1025 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
1026 | * before the new state gets committed on the software side with | |
1027 | * drm_atomic_helper_swap_state(). | |
1028 | * | |
1029 | * This scheme allows new atomic state updates to be prepared and | |
1030 | * checked in parallel to the asynchronous completion of the previous | |
1031 | * update. Which is important since compositors need to figure out the | |
1032 | * composition of the next frame right after having submitted the | |
1033 | * current layout. | |
1034 | */ | |
1035 | ||
e2330f07 DV |
1036 | wait_for_fences(dev, state); |
1037 | ||
1af434a9 | 1038 | drm_atomic_helper_commit_modeset_disables(dev, state); |
623369e5 DV |
1039 | |
1040 | drm_atomic_helper_commit_planes(dev, state); | |
1041 | ||
1af434a9 | 1042 | drm_atomic_helper_commit_modeset_enables(dev, state); |
623369e5 | 1043 | |
5ee3229c | 1044 | drm_atomic_helper_wait_for_vblanks(dev, state); |
623369e5 DV |
1045 | |
1046 | drm_atomic_helper_cleanup_planes(dev, state); | |
1047 | ||
1048 | drm_atomic_state_free(state); | |
1049 | ||
1050 | return 0; | |
1051 | } | |
1052 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1053 | ||
e8c833a7 DV |
1054 | /** |
1055 | * DOC: implementing async commit | |
1056 | * | |
1057 | * For now the atomic helpers don't support async commit directly. If there is | |
1058 | * real need it could be added though, using the dma-buf fence infrastructure | |
1059 | * for generic synchronization with outstanding rendering. | |
1060 | * | |
1061 | * For now drivers have to implement async commit themselves, with the following | |
1062 | * sequence being the recommended one: | |
1063 | * | |
1064 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
1065 | * which commit needs to call which can fail, so we want to run it first and | |
1066 | * synchronously. | |
1067 | * | |
1068 | * 2. Synchronize with any outstanding asynchronous commit worker threads which | |
1069 | * might be affected the new state update. This can be done by either cancelling | |
1070 | * or flushing the work items, depending upon whether the driver can deal with | |
1071 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
1072 | * cleanup is still done when cancelling. | |
1073 | * | |
1074 | * For sufficient parallelism it is recommended to have a work item per crtc | |
1075 | * (for updates which don't touch global state) and a global one. Then we only | |
1076 | * need to synchronize with the crtc work items for changed crtcs and the global | |
1077 | * work item, which allows nice concurrent updates on disjoint sets of crtcs. | |
1078 | * | |
1079 | * 3. The software state is updated synchronously with | |
26196f7e | 1080 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
e8c833a7 DV |
1081 | * locks means concurrent callers never see inconsistent state. And doing this |
1082 | * while it's guaranteed that no relevant async worker runs means that async | |
1083 | * workers do not need grab any locks. Actually they must not grab locks, for | |
1084 | * otherwise the work flushing will deadlock. | |
1085 | * | |
1086 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1087 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1088 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
1089 | * being displayed. | |
1090 | */ | |
1091 | ||
c2fcd274 | 1092 | /** |
2e3afd47 | 1093 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 1094 | * @dev: DRM device |
2e3afd47 | 1095 | * @state: atomic state object with new state structures |
c2fcd274 DV |
1096 | * |
1097 | * This function prepares plane state, specifically framebuffers, for the new | |
1098 | * configuration. If any failure is encountered this function will call | |
1099 | * ->cleanup_fb on any already successfully prepared framebuffer. | |
1100 | * | |
1101 | * Returns: | |
1102 | * 0 on success, negative error code on failure. | |
1103 | */ | |
1104 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
1105 | struct drm_atomic_state *state) | |
1106 | { | |
1107 | int nplanes = dev->mode_config.num_total_plane; | |
1108 | int ret, i; | |
1109 | ||
1110 | for (i = 0; i < nplanes; i++) { | |
b5ceff20 | 1111 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1112 | struct drm_plane *plane = state->planes[i]; |
d136dfee | 1113 | struct drm_plane_state *plane_state = state->plane_states[i]; |
c2fcd274 DV |
1114 | struct drm_framebuffer *fb; |
1115 | ||
1116 | if (!plane) | |
1117 | continue; | |
1118 | ||
1119 | funcs = plane->helper_private; | |
1120 | ||
d136dfee | 1121 | fb = plane_state->fb; |
c2fcd274 DV |
1122 | |
1123 | if (fb && funcs->prepare_fb) { | |
d136dfee | 1124 | ret = funcs->prepare_fb(plane, fb, plane_state); |
c2fcd274 DV |
1125 | if (ret) |
1126 | goto fail; | |
1127 | } | |
1128 | } | |
1129 | ||
1130 | return 0; | |
1131 | ||
1132 | fail: | |
1133 | for (i--; i >= 0; i--) { | |
b5ceff20 | 1134 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1135 | struct drm_plane *plane = state->planes[i]; |
d136dfee | 1136 | struct drm_plane_state *plane_state = state->plane_states[i]; |
c2fcd274 DV |
1137 | struct drm_framebuffer *fb; |
1138 | ||
1139 | if (!plane) | |
1140 | continue; | |
1141 | ||
1142 | funcs = plane->helper_private; | |
1143 | ||
1144 | fb = state->plane_states[i]->fb; | |
1145 | ||
1146 | if (fb && funcs->cleanup_fb) | |
d136dfee | 1147 | funcs->cleanup_fb(plane, fb, plane_state); |
c2fcd274 DV |
1148 | |
1149 | } | |
1150 | ||
1151 | return ret; | |
1152 | } | |
1153 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
1154 | ||
1155 | /** | |
1156 | * drm_atomic_helper_commit_planes - commit plane state | |
1157 | * @dev: DRM device | |
b0fcfc89 | 1158 | * @old_state: atomic state object with old state structures |
c2fcd274 DV |
1159 | * |
1160 | * This function commits the new plane state using the plane and atomic helper | |
1161 | * functions for planes and crtcs. It assumes that the atomic state has already | |
1162 | * been pushed into the relevant object state pointers, since this step can no | |
1163 | * longer fail. | |
1164 | * | |
b0fcfc89 | 1165 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 | 1166 | * crtcs need to be updated though. |
de28d021 ML |
1167 | * |
1168 | * Note that this function does all plane updates across all CRTCs in one step. | |
1169 | * If the hardware can't support this approach look at | |
1170 | * drm_atomic_helper_commit_planes_on_crtc() instead. | |
c2fcd274 DV |
1171 | */ |
1172 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
b0fcfc89 | 1173 | struct drm_atomic_state *old_state) |
c2fcd274 | 1174 | { |
df63b999 ACO |
1175 | struct drm_crtc *crtc; |
1176 | struct drm_crtc_state *old_crtc_state; | |
1177 | struct drm_plane *plane; | |
1178 | struct drm_plane_state *old_plane_state; | |
c2fcd274 DV |
1179 | int i; |
1180 | ||
df63b999 | 1181 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1182 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1183 | |
1184 | funcs = crtc->helper_private; | |
1185 | ||
1186 | if (!funcs || !funcs->atomic_begin) | |
1187 | continue; | |
1188 | ||
613d2b27 | 1189 | funcs->atomic_begin(crtc, old_crtc_state); |
c2fcd274 DV |
1190 | } |
1191 | ||
df63b999 | 1192 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
b5ceff20 | 1193 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
1194 | |
1195 | funcs = plane->helper_private; | |
1196 | ||
3cad4b68 | 1197 | if (!funcs) |
c2fcd274 DV |
1198 | continue; |
1199 | ||
407b8bd9 TR |
1200 | /* |
1201 | * Special-case disabling the plane if drivers support it. | |
1202 | */ | |
1203 | if (drm_atomic_plane_disabling(plane, old_plane_state) && | |
1204 | funcs->atomic_disable) | |
1205 | funcs->atomic_disable(plane, old_plane_state); | |
475d231b DV |
1206 | else if (plane->state->crtc || |
1207 | drm_atomic_plane_disabling(plane, old_plane_state)) | |
407b8bd9 | 1208 | funcs->atomic_update(plane, old_plane_state); |
c2fcd274 DV |
1209 | } |
1210 | ||
df63b999 | 1211 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1212 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1213 | |
1214 | funcs = crtc->helper_private; | |
1215 | ||
1216 | if (!funcs || !funcs->atomic_flush) | |
1217 | continue; | |
1218 | ||
613d2b27 | 1219 | funcs->atomic_flush(crtc, old_crtc_state); |
c2fcd274 DV |
1220 | } |
1221 | } | |
1222 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1223 | ||
de28d021 ML |
1224 | /** |
1225 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc | |
1226 | * @old_crtc_state: atomic state object with the old crtc state | |
1227 | * | |
1228 | * This function commits the new plane state using the plane and atomic helper | |
1229 | * functions for planes on the specific crtc. It assumes that the atomic state | |
1230 | * has already been pushed into the relevant object state pointers, since this | |
1231 | * step can no longer fail. | |
1232 | * | |
1233 | * This function is useful when plane updates should be done crtc-by-crtc | |
1234 | * instead of one global step like drm_atomic_helper_commit_planes() does. | |
1235 | * | |
1236 | * This function can only be savely used when planes are not allowed to move | |
1237 | * between different CRTCs because this function doesn't handle inter-CRTC | |
1238 | * depencies. Callers need to ensure that either no such depencies exist, | |
1239 | * resolve them through ordering of commit calls or through some other means. | |
1240 | */ | |
1241 | void | |
1242 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) | |
1243 | { | |
1244 | const struct drm_crtc_helper_funcs *crtc_funcs; | |
1245 | struct drm_crtc *crtc = old_crtc_state->crtc; | |
1246 | struct drm_atomic_state *old_state = old_crtc_state->state; | |
1247 | struct drm_plane *plane; | |
1248 | unsigned plane_mask; | |
1249 | ||
1250 | plane_mask = old_crtc_state->plane_mask; | |
1251 | plane_mask |= crtc->state->plane_mask; | |
1252 | ||
1253 | crtc_funcs = crtc->helper_private; | |
1254 | if (crtc_funcs && crtc_funcs->atomic_begin) | |
613d2b27 | 1255 | crtc_funcs->atomic_begin(crtc, old_crtc_state); |
de28d021 ML |
1256 | |
1257 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { | |
1258 | struct drm_plane_state *old_plane_state = | |
1259 | drm_atomic_get_existing_plane_state(old_state, plane); | |
1260 | const struct drm_plane_helper_funcs *plane_funcs; | |
1261 | ||
1262 | plane_funcs = plane->helper_private; | |
1263 | ||
1264 | if (!old_plane_state || !plane_funcs) | |
1265 | continue; | |
1266 | ||
1267 | WARN_ON(plane->state->crtc && plane->state->crtc != crtc); | |
1268 | ||
1269 | if (drm_atomic_plane_disabling(plane, old_plane_state) && | |
1270 | plane_funcs->atomic_disable) | |
1271 | plane_funcs->atomic_disable(plane, old_plane_state); | |
1272 | else if (plane->state->crtc || | |
1273 | drm_atomic_plane_disabling(plane, old_plane_state)) | |
1274 | plane_funcs->atomic_update(plane, old_plane_state); | |
1275 | } | |
1276 | ||
1277 | if (crtc_funcs && crtc_funcs->atomic_flush) | |
613d2b27 | 1278 | crtc_funcs->atomic_flush(crtc, old_crtc_state); |
de28d021 ML |
1279 | } |
1280 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); | |
1281 | ||
c2fcd274 DV |
1282 | /** |
1283 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1284 | * @dev: DRM device | |
1285 | * @old_state: atomic state object with old state structures | |
1286 | * | |
1287 | * This function cleans up plane state, specifically framebuffers, from the old | |
1288 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1289 | * be able to call this function. | |
1290 | * | |
1291 | * This function must also be called on the new state when the atomic update | |
1292 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1293 | */ | |
1294 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1295 | struct drm_atomic_state *old_state) | |
1296 | { | |
df63b999 ACO |
1297 | struct drm_plane *plane; |
1298 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
1299 | int i; |
1300 | ||
df63b999 | 1301 | for_each_plane_in_state(old_state, plane, plane_state, i) { |
b5ceff20 | 1302 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
1303 | struct drm_framebuffer *old_fb; |
1304 | ||
c2fcd274 DV |
1305 | funcs = plane->helper_private; |
1306 | ||
d136dfee | 1307 | old_fb = plane_state->fb; |
c2fcd274 DV |
1308 | |
1309 | if (old_fb && funcs->cleanup_fb) | |
d136dfee | 1310 | funcs->cleanup_fb(plane, old_fb, plane_state); |
c2fcd274 DV |
1311 | } |
1312 | } | |
1313 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1314 | ||
1315 | /** | |
1316 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
1317 | * @dev: DRM device | |
1318 | * @state: atomic state | |
1319 | * | |
1320 | * This function stores the atomic state into the current state pointers in all | |
1321 | * driver objects. It should be called after all failing steps have been done | |
1322 | * and succeeded, but before the actual hardware state is committed. | |
1323 | * | |
1324 | * For cleanup and error recovery the current state for all changed objects will | |
1325 | * be swaped into @state. | |
1326 | * | |
1327 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1328 | * | |
1329 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1330 | * | |
1331 | * 2. Do any other steps that might fail. | |
1332 | * | |
1333 | * 3. Put the staged state into the current state pointers with this function. | |
1334 | * | |
1335 | * 4. Actually commit the hardware state. | |
1336 | * | |
26196f7e | 1337 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
c2fcd274 DV |
1338 | * contains the old state. Also do any other cleanup required with that state. |
1339 | */ | |
1340 | void drm_atomic_helper_swap_state(struct drm_device *dev, | |
1341 | struct drm_atomic_state *state) | |
1342 | { | |
1343 | int i; | |
1344 | ||
1345 | for (i = 0; i < dev->mode_config.num_connector; i++) { | |
1346 | struct drm_connector *connector = state->connectors[i]; | |
1347 | ||
1348 | if (!connector) | |
1349 | continue; | |
1350 | ||
1351 | connector->state->state = state; | |
1352 | swap(state->connector_states[i], connector->state); | |
1353 | connector->state->state = NULL; | |
1354 | } | |
1355 | ||
1356 | for (i = 0; i < dev->mode_config.num_crtc; i++) { | |
1357 | struct drm_crtc *crtc = state->crtcs[i]; | |
1358 | ||
1359 | if (!crtc) | |
1360 | continue; | |
1361 | ||
1362 | crtc->state->state = state; | |
1363 | swap(state->crtc_states[i], crtc->state); | |
1364 | crtc->state->state = NULL; | |
1365 | } | |
1366 | ||
1367 | for (i = 0; i < dev->mode_config.num_total_plane; i++) { | |
1368 | struct drm_plane *plane = state->planes[i]; | |
1369 | ||
1370 | if (!plane) | |
1371 | continue; | |
1372 | ||
1373 | plane->state->state = state; | |
1374 | swap(state->plane_states[i], plane->state); | |
1375 | plane->state->state = NULL; | |
1376 | } | |
1377 | } | |
1378 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
1379 | |
1380 | /** | |
1381 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
1382 | * @plane: plane object to update | |
1383 | * @crtc: owning CRTC of owning plane | |
1384 | * @fb: framebuffer to flip onto plane | |
1385 | * @crtc_x: x offset of primary plane on crtc | |
1386 | * @crtc_y: y offset of primary plane on crtc | |
1387 | * @crtc_w: width of primary plane rectangle on crtc | |
1388 | * @crtc_h: height of primary plane rectangle on crtc | |
1389 | * @src_x: x offset of @fb for panning | |
1390 | * @src_y: y offset of @fb for panning | |
1391 | * @src_w: width of source rectangle in @fb | |
1392 | * @src_h: height of source rectangle in @fb | |
1393 | * | |
1394 | * Provides a default plane update handler using the atomic driver interface. | |
1395 | * | |
1396 | * RETURNS: | |
1397 | * Zero on success, error code on failure | |
1398 | */ | |
1399 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
1400 | struct drm_crtc *crtc, | |
1401 | struct drm_framebuffer *fb, | |
1402 | int crtc_x, int crtc_y, | |
1403 | unsigned int crtc_w, unsigned int crtc_h, | |
1404 | uint32_t src_x, uint32_t src_y, | |
1405 | uint32_t src_w, uint32_t src_h) | |
1406 | { | |
1407 | struct drm_atomic_state *state; | |
1408 | struct drm_plane_state *plane_state; | |
1409 | int ret = 0; | |
1410 | ||
1411 | state = drm_atomic_state_alloc(plane->dev); | |
1412 | if (!state) | |
1413 | return -ENOMEM; | |
1414 | ||
1415 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1416 | retry: | |
1417 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1418 | if (IS_ERR(plane_state)) { | |
1419 | ret = PTR_ERR(plane_state); | |
1420 | goto fail; | |
1421 | } | |
1422 | ||
07cc0ef6 | 1423 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
1424 | if (ret != 0) |
1425 | goto fail; | |
321ebf04 | 1426 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
1427 | plane_state->crtc_x = crtc_x; |
1428 | plane_state->crtc_y = crtc_y; | |
1429 | plane_state->crtc_h = crtc_h; | |
1430 | plane_state->crtc_w = crtc_w; | |
1431 | plane_state->src_x = src_x; | |
1432 | plane_state->src_y = src_y; | |
1433 | plane_state->src_h = src_h; | |
1434 | plane_state->src_w = src_w; | |
1435 | ||
3671c580 DV |
1436 | if (plane == crtc->cursor) |
1437 | state->legacy_cursor_update = true; | |
1438 | ||
042652ed DV |
1439 | ret = drm_atomic_commit(state); |
1440 | if (ret != 0) | |
1441 | goto fail; | |
1442 | ||
1443 | /* Driver takes ownership of state on successful commit. */ | |
1444 | return 0; | |
1445 | fail: | |
1446 | if (ret == -EDEADLK) | |
1447 | goto backoff; | |
1448 | ||
1449 | drm_atomic_state_free(state); | |
1450 | ||
1451 | return ret; | |
1452 | backoff: | |
042652ed | 1453 | drm_atomic_state_clear(state); |
6f75cea6 | 1454 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1455 | |
1456 | /* | |
1457 | * Someone might have exchanged the framebuffer while we dropped locks | |
1458 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1459 | * core does for us. | |
1460 | */ | |
1461 | plane->old_fb = plane->fb; | |
1462 | ||
1463 | goto retry; | |
1464 | } | |
1465 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
1466 | ||
1467 | /** | |
1468 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
1469 | * @plane: plane to disable | |
1470 | * | |
1471 | * Provides a default plane disable handler using the atomic driver interface. | |
1472 | * | |
1473 | * RETURNS: | |
1474 | * Zero on success, error code on failure | |
1475 | */ | |
1476 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
1477 | { | |
1478 | struct drm_atomic_state *state; | |
1479 | struct drm_plane_state *plane_state; | |
1480 | int ret = 0; | |
1481 | ||
aa54e2ee JSP |
1482 | /* |
1483 | * FIXME: Without plane->crtc set we can't get at the implicit legacy | |
1484 | * acquire context. The real fix will be to wire the acquire ctx through | |
1485 | * everywhere we need it, but meanwhile prevent chaos by just skipping | |
1486 | * this noop. The critical case is the cursor ioctls which a) only grab | |
1487 | * crtc/cursor-plane locks (so we need the crtc to get at the right | |
1488 | * acquire context) and b) can try to disable the plane multiple times. | |
1489 | */ | |
1490 | if (!plane->crtc) | |
1491 | return 0; | |
1492 | ||
042652ed DV |
1493 | state = drm_atomic_state_alloc(plane->dev); |
1494 | if (!state) | |
1495 | return -ENOMEM; | |
1496 | ||
1497 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
1498 | retry: | |
1499 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1500 | if (IS_ERR(plane_state)) { | |
1501 | ret = PTR_ERR(plane_state); | |
1502 | goto fail; | |
1503 | } | |
1504 | ||
07cc0ef6 | 1505 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); |
042652ed DV |
1506 | if (ret != 0) |
1507 | goto fail; | |
321ebf04 | 1508 | drm_atomic_set_fb_for_plane(plane_state, NULL); |
042652ed DV |
1509 | plane_state->crtc_x = 0; |
1510 | plane_state->crtc_y = 0; | |
1511 | plane_state->crtc_h = 0; | |
1512 | plane_state->crtc_w = 0; | |
1513 | plane_state->src_x = 0; | |
1514 | plane_state->src_y = 0; | |
1515 | plane_state->src_h = 0; | |
1516 | plane_state->src_w = 0; | |
1517 | ||
f02ad907 DV |
1518 | if (plane == plane->crtc->cursor) |
1519 | state->legacy_cursor_update = true; | |
1520 | ||
042652ed DV |
1521 | ret = drm_atomic_commit(state); |
1522 | if (ret != 0) | |
1523 | goto fail; | |
1524 | ||
1525 | /* Driver takes ownership of state on successful commit. */ | |
1526 | return 0; | |
1527 | fail: | |
1528 | if (ret == -EDEADLK) | |
1529 | goto backoff; | |
1530 | ||
1531 | drm_atomic_state_free(state); | |
1532 | ||
1533 | return ret; | |
1534 | backoff: | |
042652ed | 1535 | drm_atomic_state_clear(state); |
6f75cea6 | 1536 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1537 | |
1538 | /* | |
1539 | * Someone might have exchanged the framebuffer while we dropped locks | |
1540 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1541 | * core does for us. | |
1542 | */ | |
1543 | plane->old_fb = plane->fb; | |
1544 | ||
1545 | goto retry; | |
1546 | } | |
1547 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
1548 | ||
1549 | static int update_output_state(struct drm_atomic_state *state, | |
1550 | struct drm_mode_set *set) | |
1551 | { | |
1552 | struct drm_device *dev = set->crtc->dev; | |
df63b999 ACO |
1553 | struct drm_crtc *crtc; |
1554 | struct drm_crtc_state *crtc_state; | |
1555 | struct drm_connector *connector; | |
042652ed | 1556 | struct drm_connector_state *conn_state; |
042652ed DV |
1557 | int ret, i, j; |
1558 | ||
1559 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
1560 | state->acquire_ctx); | |
1561 | if (ret) | |
1562 | return ret; | |
1563 | ||
1564 | /* First grab all affected connector/crtc states. */ | |
1565 | for (i = 0; i < set->num_connectors; i++) { | |
1566 | conn_state = drm_atomic_get_connector_state(state, | |
1567 | set->connectors[i]); | |
1568 | if (IS_ERR(conn_state)) | |
1569 | return PTR_ERR(conn_state); | |
1570 | } | |
1571 | ||
df63b999 | 1572 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
1573 | ret = drm_atomic_add_affected_connectors(state, crtc); |
1574 | if (ret) | |
1575 | return ret; | |
1576 | } | |
1577 | ||
1578 | /* Then recompute connector->crtc links and crtc enabling state. */ | |
df63b999 | 1579 | for_each_connector_in_state(state, connector, conn_state, i) { |
042652ed DV |
1580 | if (conn_state->crtc == set->crtc) { |
1581 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1582 | NULL); | |
1583 | if (ret) | |
1584 | return ret; | |
1585 | } | |
1586 | ||
1587 | for (j = 0; j < set->num_connectors; j++) { | |
1588 | if (set->connectors[j] == connector) { | |
1589 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1590 | set->crtc); | |
1591 | if (ret) | |
1592 | return ret; | |
1593 | break; | |
1594 | } | |
1595 | } | |
1596 | } | |
1597 | ||
df63b999 | 1598 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
1599 | /* Don't update ->enable for the CRTC in the set_config request, |
1600 | * since a mismatch would indicate a bug in the upper layers. | |
1601 | * The actual modeset code later on will catch any | |
1602 | * inconsistencies here. */ | |
1603 | if (crtc == set->crtc) | |
1604 | continue; | |
1605 | ||
c30f55a7 LP |
1606 | if (!drm_atomic_connectors_for_crtc(state, crtc)) { |
1607 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, | |
1608 | NULL); | |
1609 | if (ret < 0) | |
1610 | return ret; | |
1611 | ||
9b5edbf7 | 1612 | crtc_state->active = false; |
c30f55a7 | 1613 | } |
042652ed DV |
1614 | } |
1615 | ||
1616 | return 0; | |
1617 | } | |
1618 | ||
1619 | /** | |
1620 | * drm_atomic_helper_set_config - set a new config from userspace | |
1621 | * @set: mode set configuration | |
1622 | * | |
1623 | * Provides a default crtc set_config handler using the atomic driver interface. | |
1624 | * | |
1625 | * Returns: | |
1626 | * Returns 0 on success, negative errno numbers on failure. | |
1627 | */ | |
1628 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
1629 | { | |
1630 | struct drm_atomic_state *state; | |
1631 | struct drm_crtc *crtc = set->crtc; | |
1632 | struct drm_crtc_state *crtc_state; | |
1633 | struct drm_plane_state *primary_state; | |
1634 | int ret = 0; | |
1635 | ||
1636 | state = drm_atomic_state_alloc(crtc->dev); | |
1637 | if (!state) | |
1638 | return -ENOMEM; | |
1639 | ||
1640 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1641 | retry: | |
1642 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1643 | if (IS_ERR(crtc_state)) { | |
1644 | ret = PTR_ERR(crtc_state); | |
1645 | goto fail; | |
1646 | } | |
1647 | ||
e5b5341c RC |
1648 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); |
1649 | if (IS_ERR(primary_state)) { | |
1650 | ret = PTR_ERR(primary_state); | |
1651 | goto fail; | |
1652 | } | |
1653 | ||
042652ed DV |
1654 | if (!set->mode) { |
1655 | WARN_ON(set->fb); | |
1656 | WARN_ON(set->num_connectors); | |
1657 | ||
819364da DS |
1658 | ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); |
1659 | if (ret != 0) | |
1660 | goto fail; | |
1661 | ||
eab3bbef | 1662 | crtc_state->active = false; |
e5b5341c | 1663 | |
07cc0ef6 | 1664 | ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
e5b5341c RC |
1665 | if (ret != 0) |
1666 | goto fail; | |
1667 | ||
1668 | drm_atomic_set_fb_for_plane(primary_state, NULL); | |
1669 | ||
042652ed DV |
1670 | goto commit; |
1671 | } | |
1672 | ||
1673 | WARN_ON(!set->fb); | |
1674 | WARN_ON(!set->num_connectors); | |
1675 | ||
819364da DS |
1676 | ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); |
1677 | if (ret != 0) | |
1678 | goto fail; | |
1679 | ||
eab3bbef | 1680 | crtc_state->active = true; |
042652ed | 1681 | |
07cc0ef6 | 1682 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
042652ed DV |
1683 | if (ret != 0) |
1684 | goto fail; | |
321ebf04 | 1685 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
042652ed DV |
1686 | primary_state->crtc_x = 0; |
1687 | primary_state->crtc_y = 0; | |
1688 | primary_state->crtc_h = set->mode->vdisplay; | |
1689 | primary_state->crtc_w = set->mode->hdisplay; | |
1690 | primary_state->src_x = set->x << 16; | |
1691 | primary_state->src_y = set->y << 16; | |
1692 | primary_state->src_h = set->mode->vdisplay << 16; | |
1693 | primary_state->src_w = set->mode->hdisplay << 16; | |
1694 | ||
1695 | commit: | |
1696 | ret = update_output_state(state, set); | |
1697 | if (ret) | |
1698 | goto fail; | |
1699 | ||
1700 | ret = drm_atomic_commit(state); | |
1701 | if (ret != 0) | |
1702 | goto fail; | |
1703 | ||
1704 | /* Driver takes ownership of state on successful commit. */ | |
1705 | return 0; | |
1706 | fail: | |
1707 | if (ret == -EDEADLK) | |
1708 | goto backoff; | |
1709 | ||
1710 | drm_atomic_state_free(state); | |
1711 | ||
1712 | return ret; | |
1713 | backoff: | |
042652ed | 1714 | drm_atomic_state_clear(state); |
6f75cea6 | 1715 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1716 | |
1717 | /* | |
1718 | * Someone might have exchanged the framebuffer while we dropped locks | |
1719 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1720 | * core does for us. | |
1721 | */ | |
1722 | crtc->primary->old_fb = crtc->primary->fb; | |
1723 | ||
1724 | goto retry; | |
1725 | } | |
1726 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
1727 | ||
1728 | /** | |
7f50002f | 1729 | * drm_atomic_helper_crtc_set_property - helper for crtc properties |
042652ed DV |
1730 | * @crtc: DRM crtc |
1731 | * @property: DRM property | |
1732 | * @val: value of property | |
1733 | * | |
7f50002f LP |
1734 | * Provides a default crtc set_property handler using the atomic driver |
1735 | * interface. | |
042652ed DV |
1736 | * |
1737 | * RETURNS: | |
1738 | * Zero on success, error code on failure | |
1739 | */ | |
1740 | int | |
1741 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
1742 | struct drm_property *property, | |
1743 | uint64_t val) | |
1744 | { | |
1745 | struct drm_atomic_state *state; | |
1746 | struct drm_crtc_state *crtc_state; | |
1747 | int ret = 0; | |
1748 | ||
1749 | state = drm_atomic_state_alloc(crtc->dev); | |
1750 | if (!state) | |
1751 | return -ENOMEM; | |
1752 | ||
1753 | /* ->set_property is always called with all locks held. */ | |
1754 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
1755 | retry: | |
1756 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1757 | if (IS_ERR(crtc_state)) { | |
1758 | ret = PTR_ERR(crtc_state); | |
1759 | goto fail; | |
1760 | } | |
1761 | ||
40ecc694 RC |
1762 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
1763 | property, val); | |
042652ed DV |
1764 | if (ret) |
1765 | goto fail; | |
1766 | ||
1767 | ret = drm_atomic_commit(state); | |
1768 | if (ret != 0) | |
1769 | goto fail; | |
1770 | ||
1771 | /* Driver takes ownership of state on successful commit. */ | |
1772 | return 0; | |
1773 | fail: | |
1774 | if (ret == -EDEADLK) | |
1775 | goto backoff; | |
1776 | ||
1777 | drm_atomic_state_free(state); | |
1778 | ||
1779 | return ret; | |
1780 | backoff: | |
042652ed | 1781 | drm_atomic_state_clear(state); |
6f75cea6 | 1782 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1783 | |
1784 | goto retry; | |
1785 | } | |
1786 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
1787 | ||
1788 | /** | |
7f50002f | 1789 | * drm_atomic_helper_plane_set_property - helper for plane properties |
042652ed DV |
1790 | * @plane: DRM plane |
1791 | * @property: DRM property | |
1792 | * @val: value of property | |
1793 | * | |
7f50002f LP |
1794 | * Provides a default plane set_property handler using the atomic driver |
1795 | * interface. | |
042652ed DV |
1796 | * |
1797 | * RETURNS: | |
1798 | * Zero on success, error code on failure | |
1799 | */ | |
1800 | int | |
1801 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
1802 | struct drm_property *property, | |
1803 | uint64_t val) | |
1804 | { | |
1805 | struct drm_atomic_state *state; | |
1806 | struct drm_plane_state *plane_state; | |
1807 | int ret = 0; | |
1808 | ||
1809 | state = drm_atomic_state_alloc(plane->dev); | |
1810 | if (!state) | |
1811 | return -ENOMEM; | |
1812 | ||
1813 | /* ->set_property is always called with all locks held. */ | |
1814 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
1815 | retry: | |
1816 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1817 | if (IS_ERR(plane_state)) { | |
1818 | ret = PTR_ERR(plane_state); | |
1819 | goto fail; | |
1820 | } | |
1821 | ||
40ecc694 RC |
1822 | ret = drm_atomic_plane_set_property(plane, plane_state, |
1823 | property, val); | |
042652ed DV |
1824 | if (ret) |
1825 | goto fail; | |
1826 | ||
1827 | ret = drm_atomic_commit(state); | |
1828 | if (ret != 0) | |
1829 | goto fail; | |
1830 | ||
1831 | /* Driver takes ownership of state on successful commit. */ | |
1832 | return 0; | |
1833 | fail: | |
1834 | if (ret == -EDEADLK) | |
1835 | goto backoff; | |
1836 | ||
1837 | drm_atomic_state_free(state); | |
1838 | ||
1839 | return ret; | |
1840 | backoff: | |
042652ed | 1841 | drm_atomic_state_clear(state); |
6f75cea6 | 1842 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1843 | |
1844 | goto retry; | |
1845 | } | |
1846 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
1847 | ||
1848 | /** | |
7f50002f | 1849 | * drm_atomic_helper_connector_set_property - helper for connector properties |
042652ed DV |
1850 | * @connector: DRM connector |
1851 | * @property: DRM property | |
1852 | * @val: value of property | |
1853 | * | |
7f50002f LP |
1854 | * Provides a default connector set_property handler using the atomic driver |
1855 | * interface. | |
042652ed DV |
1856 | * |
1857 | * RETURNS: | |
1858 | * Zero on success, error code on failure | |
1859 | */ | |
1860 | int | |
1861 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
1862 | struct drm_property *property, | |
1863 | uint64_t val) | |
1864 | { | |
1865 | struct drm_atomic_state *state; | |
1866 | struct drm_connector_state *connector_state; | |
1867 | int ret = 0; | |
1868 | ||
1869 | state = drm_atomic_state_alloc(connector->dev); | |
1870 | if (!state) | |
1871 | return -ENOMEM; | |
1872 | ||
1873 | /* ->set_property is always called with all locks held. */ | |
1874 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
1875 | retry: | |
1876 | connector_state = drm_atomic_get_connector_state(state, connector); | |
1877 | if (IS_ERR(connector_state)) { | |
1878 | ret = PTR_ERR(connector_state); | |
1879 | goto fail; | |
1880 | } | |
1881 | ||
40ecc694 RC |
1882 | ret = drm_atomic_connector_set_property(connector, connector_state, |
1883 | property, val); | |
042652ed DV |
1884 | if (ret) |
1885 | goto fail; | |
1886 | ||
1887 | ret = drm_atomic_commit(state); | |
1888 | if (ret != 0) | |
1889 | goto fail; | |
1890 | ||
1891 | /* Driver takes ownership of state on successful commit. */ | |
1892 | return 0; | |
1893 | fail: | |
1894 | if (ret == -EDEADLK) | |
1895 | goto backoff; | |
1896 | ||
1897 | drm_atomic_state_free(state); | |
1898 | ||
1899 | return ret; | |
1900 | backoff: | |
042652ed | 1901 | drm_atomic_state_clear(state); |
6f75cea6 | 1902 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1903 | |
1904 | goto retry; | |
1905 | } | |
1906 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 DV |
1907 | |
1908 | /** | |
1909 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
1910 | * @crtc: DRM crtc | |
1911 | * @fb: DRM framebuffer | |
1912 | * @event: optional DRM event to signal upon completion | |
1913 | * @flags: flip flags for non-vblank sync'ed updates | |
1914 | * | |
1915 | * Provides a default page flip implementation using the atomic driver interface. | |
1916 | * | |
1917 | * Note that for now so called async page flips (i.e. updates which are not | |
1918 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
1919 | * no provisions for this yet. | |
1920 | * | |
1921 | * Returns: | |
1922 | * Returns 0 on success, negative errno numbers on failure. | |
1923 | */ | |
1924 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
1925 | struct drm_framebuffer *fb, | |
1926 | struct drm_pending_vblank_event *event, | |
1927 | uint32_t flags) | |
1928 | { | |
1929 | struct drm_plane *plane = crtc->primary; | |
1930 | struct drm_atomic_state *state; | |
1931 | struct drm_plane_state *plane_state; | |
1932 | struct drm_crtc_state *crtc_state; | |
1933 | int ret = 0; | |
1934 | ||
1935 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
1936 | return -EINVAL; | |
1937 | ||
1938 | state = drm_atomic_state_alloc(plane->dev); | |
1939 | if (!state) | |
1940 | return -ENOMEM; | |
1941 | ||
1942 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1943 | retry: | |
1944 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1945 | if (IS_ERR(crtc_state)) { | |
1946 | ret = PTR_ERR(crtc_state); | |
1947 | goto fail; | |
1948 | } | |
1949 | crtc_state->event = event; | |
1950 | ||
1951 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1952 | if (IS_ERR(plane_state)) { | |
1953 | ret = PTR_ERR(plane_state); | |
1954 | goto fail; | |
1955 | } | |
1956 | ||
07cc0ef6 | 1957 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
8bc0f312 DV |
1958 | if (ret != 0) |
1959 | goto fail; | |
321ebf04 | 1960 | drm_atomic_set_fb_for_plane(plane_state, fb); |
8bc0f312 DV |
1961 | |
1962 | ret = drm_atomic_async_commit(state); | |
1963 | if (ret != 0) | |
1964 | goto fail; | |
1965 | ||
8bc0f312 DV |
1966 | /* Driver takes ownership of state on successful async commit. */ |
1967 | return 0; | |
1968 | fail: | |
1969 | if (ret == -EDEADLK) | |
1970 | goto backoff; | |
1971 | ||
1972 | drm_atomic_state_free(state); | |
1973 | ||
1974 | return ret; | |
1975 | backoff: | |
8bc0f312 | 1976 | drm_atomic_state_clear(state); |
6f75cea6 | 1977 | drm_atomic_legacy_backoff(state); |
8bc0f312 DV |
1978 | |
1979 | /* | |
1980 | * Someone might have exchanged the framebuffer while we dropped locks | |
1981 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1982 | * core does for us. | |
1983 | */ | |
1984 | plane->old_fb = plane->fb; | |
1985 | ||
1986 | goto retry; | |
1987 | } | |
1988 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
d461701c | 1989 | |
b486e0e6 DV |
1990 | /** |
1991 | * drm_atomic_helper_connector_dpms() - connector dpms helper implementation | |
1992 | * @connector: affected connector | |
1993 | * @mode: DPMS mode | |
1994 | * | |
1995 | * This is the main helper function provided by the atomic helper framework for | |
1996 | * implementing the legacy DPMS connector interface. It computes the new desired | |
1997 | * ->active state for the corresponding CRTC (if the connector is enabled) and | |
1998 | * updates it. | |
9a69a9ac ML |
1999 | * |
2000 | * Returns: | |
2001 | * Returns 0 on success, negative errno numbers on failure. | |
b486e0e6 | 2002 | */ |
9a69a9ac ML |
2003 | int drm_atomic_helper_connector_dpms(struct drm_connector *connector, |
2004 | int mode) | |
b486e0e6 DV |
2005 | { |
2006 | struct drm_mode_config *config = &connector->dev->mode_config; | |
2007 | struct drm_atomic_state *state; | |
2008 | struct drm_crtc_state *crtc_state; | |
2009 | struct drm_crtc *crtc; | |
2010 | struct drm_connector *tmp_connector; | |
2011 | int ret; | |
2012 | bool active = false; | |
9a69a9ac | 2013 | int old_mode = connector->dpms; |
b486e0e6 DV |
2014 | |
2015 | if (mode != DRM_MODE_DPMS_ON) | |
2016 | mode = DRM_MODE_DPMS_OFF; | |
2017 | ||
2018 | connector->dpms = mode; | |
2019 | crtc = connector->state->crtc; | |
2020 | ||
2021 | if (!crtc) | |
9a69a9ac | 2022 | return 0; |
b486e0e6 | 2023 | |
b486e0e6 DV |
2024 | state = drm_atomic_state_alloc(connector->dev); |
2025 | if (!state) | |
9a69a9ac | 2026 | return -ENOMEM; |
b486e0e6 DV |
2027 | |
2028 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2029 | retry: | |
2030 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
9a69a9ac ML |
2031 | if (IS_ERR(crtc_state)) { |
2032 | ret = PTR_ERR(crtc_state); | |
2033 | goto fail; | |
2034 | } | |
b486e0e6 DV |
2035 | |
2036 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
2037 | ||
9a9f5ce8 | 2038 | drm_for_each_connector(tmp_connector, connector->dev) { |
0388df05 | 2039 | if (tmp_connector->state->crtc != crtc) |
b486e0e6 DV |
2040 | continue; |
2041 | ||
0388df05 | 2042 | if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { |
b486e0e6 DV |
2043 | active = true; |
2044 | break; | |
2045 | } | |
2046 | } | |
2047 | crtc_state->active = active; | |
2048 | ||
2049 | ret = drm_atomic_commit(state); | |
2050 | if (ret != 0) | |
2051 | goto fail; | |
2052 | ||
9a69a9ac ML |
2053 | /* Driver takes ownership of state on successful commit. */ |
2054 | return 0; | |
b486e0e6 DV |
2055 | fail: |
2056 | if (ret == -EDEADLK) | |
2057 | goto backoff; | |
2058 | ||
9a69a9ac | 2059 | connector->dpms = old_mode; |
b486e0e6 DV |
2060 | drm_atomic_state_free(state); |
2061 | ||
9a69a9ac | 2062 | return ret; |
b486e0e6 DV |
2063 | backoff: |
2064 | drm_atomic_state_clear(state); | |
2065 | drm_atomic_legacy_backoff(state); | |
2066 | ||
2067 | goto retry; | |
2068 | } | |
2069 | EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); | |
2070 | ||
3150c7d0 DV |
2071 | /** |
2072 | * DOC: atomic state reset and initialization | |
2073 | * | |
2074 | * Both the drm core and the atomic helpers assume that there is always the full | |
2075 | * and correct atomic software state for all connectors, CRTCs and planes | |
2076 | * available. Which is a bit a problem on driver load and also after system | |
2077 | * suspend. One way to solve this is to have a hardware state read-out | |
2078 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
2079 | * driver). | |
2080 | * | |
2081 | * The simpler solution is to just reset the software state to everything off, | |
2082 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
2083 | * the atomic helpers provide default reset implementations for all hooks. | |
2084 | */ | |
2085 | ||
d461701c DV |
2086 | /** |
2087 | * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs | |
2088 | * @crtc: drm CRTC | |
2089 | * | |
2090 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
2091 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2092 | */ | |
2093 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
2094 | { | |
99cf4a29 DS |
2095 | if (crtc->state && crtc->state->mode_blob) |
2096 | drm_property_unreference_blob(crtc->state->mode_blob); | |
d461701c DV |
2097 | kfree(crtc->state); |
2098 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
07cc0ef6 DV |
2099 | |
2100 | if (crtc->state) | |
2101 | crtc->state->crtc = crtc; | |
d461701c DV |
2102 | } |
2103 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
2104 | ||
f5e7840b TR |
2105 | /** |
2106 | * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state | |
2107 | * @crtc: CRTC object | |
2108 | * @state: atomic CRTC state | |
2109 | * | |
2110 | * Copies atomic state from a CRTC's current state and resets inferred values. | |
2111 | * This is useful for drivers that subclass the CRTC state. | |
2112 | */ | |
2113 | void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc, | |
2114 | struct drm_crtc_state *state) | |
2115 | { | |
2116 | memcpy(state, crtc->state, sizeof(*state)); | |
2117 | ||
99cf4a29 DS |
2118 | if (state->mode_blob) |
2119 | drm_property_reference_blob(state->mode_blob); | |
f5e7840b TR |
2120 | state->mode_changed = false; |
2121 | state->active_changed = false; | |
2122 | state->planes_changed = false; | |
fc596660 | 2123 | state->connectors_changed = false; |
f5e7840b TR |
2124 | state->event = NULL; |
2125 | } | |
2126 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state); | |
2127 | ||
d461701c DV |
2128 | /** |
2129 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
2130 | * @crtc: drm CRTC | |
2131 | * | |
2132 | * Default CRTC state duplicate hook for drivers which don't have their own | |
2133 | * subclassed CRTC state structure. | |
2134 | */ | |
2135 | struct drm_crtc_state * | |
2136 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
2137 | { | |
2138 | struct drm_crtc_state *state; | |
2139 | ||
2140 | if (WARN_ON(!crtc->state)) | |
2141 | return NULL; | |
2142 | ||
f5e7840b TR |
2143 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2144 | if (state) | |
2145 | __drm_atomic_helper_crtc_duplicate_state(crtc, state); | |
d461701c DV |
2146 | |
2147 | return state; | |
2148 | } | |
2149 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
2150 | ||
f5e7840b TR |
2151 | /** |
2152 | * __drm_atomic_helper_crtc_destroy_state - release CRTC state | |
2153 | * @crtc: CRTC object | |
2154 | * @state: CRTC state object to release | |
2155 | * | |
2156 | * Releases all resources stored in the CRTC state without actually freeing | |
2157 | * the memory of the CRTC state. This is useful for drivers that subclass the | |
2158 | * CRTC state. | |
2159 | */ | |
2160 | void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
2161 | struct drm_crtc_state *state) | |
2162 | { | |
99cf4a29 DS |
2163 | if (state->mode_blob) |
2164 | drm_property_unreference_blob(state->mode_blob); | |
f5e7840b TR |
2165 | } |
2166 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); | |
2167 | ||
d461701c DV |
2168 | /** |
2169 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
2170 | * @crtc: drm CRTC | |
2171 | * @state: CRTC state object to release | |
2172 | * | |
2173 | * Default CRTC state destroy hook for drivers which don't have their own | |
2174 | * subclassed CRTC state structure. | |
2175 | */ | |
2176 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
2177 | struct drm_crtc_state *state) | |
2178 | { | |
f5e7840b | 2179 | __drm_atomic_helper_crtc_destroy_state(crtc, state); |
d461701c DV |
2180 | kfree(state); |
2181 | } | |
2182 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
2183 | ||
2184 | /** | |
2185 | * drm_atomic_helper_plane_reset - default ->reset hook for planes | |
2186 | * @plane: drm plane | |
2187 | * | |
2188 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
2189 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2190 | */ | |
2191 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
2192 | { | |
321ebf04 DV |
2193 | if (plane->state && plane->state->fb) |
2194 | drm_framebuffer_unreference(plane->state->fb); | |
2195 | ||
d461701c DV |
2196 | kfree(plane->state); |
2197 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
07cc0ef6 DV |
2198 | |
2199 | if (plane->state) | |
2200 | plane->state->plane = plane; | |
d461701c DV |
2201 | } |
2202 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
2203 | ||
f5e7840b TR |
2204 | /** |
2205 | * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state | |
2206 | * @plane: plane object | |
2207 | * @state: atomic plane state | |
2208 | * | |
2209 | * Copies atomic state from a plane's current state. This is useful for | |
2210 | * drivers that subclass the plane state. | |
2211 | */ | |
2212 | void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane, | |
2213 | struct drm_plane_state *state) | |
2214 | { | |
2215 | memcpy(state, plane->state, sizeof(*state)); | |
2216 | ||
2217 | if (state->fb) | |
2218 | drm_framebuffer_reference(state->fb); | |
2219 | } | |
2220 | EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state); | |
2221 | ||
d461701c DV |
2222 | /** |
2223 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
2224 | * @plane: drm plane | |
2225 | * | |
2226 | * Default plane state duplicate hook for drivers which don't have their own | |
2227 | * subclassed plane state structure. | |
2228 | */ | |
2229 | struct drm_plane_state * | |
2230 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
2231 | { | |
321ebf04 DV |
2232 | struct drm_plane_state *state; |
2233 | ||
d461701c DV |
2234 | if (WARN_ON(!plane->state)) |
2235 | return NULL; | |
2236 | ||
f5e7840b TR |
2237 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2238 | if (state) | |
2239 | __drm_atomic_helper_plane_duplicate_state(plane, state); | |
321ebf04 DV |
2240 | |
2241 | return state; | |
d461701c DV |
2242 | } |
2243 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
2244 | ||
f5e7840b TR |
2245 | /** |
2246 | * __drm_atomic_helper_plane_destroy_state - release plane state | |
2247 | * @plane: plane object | |
2248 | * @state: plane state object to release | |
2249 | * | |
2250 | * Releases all resources stored in the plane state without actually freeing | |
2251 | * the memory of the plane state. This is useful for drivers that subclass the | |
2252 | * plane state. | |
2253 | */ | |
2254 | void __drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
2255 | struct drm_plane_state *state) | |
2256 | { | |
2257 | if (state->fb) | |
2258 | drm_framebuffer_unreference(state->fb); | |
2259 | } | |
2260 | EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state); | |
2261 | ||
d461701c DV |
2262 | /** |
2263 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
2264 | * @plane: drm plane | |
2265 | * @state: plane state object to release | |
2266 | * | |
2267 | * Default plane state destroy hook for drivers which don't have their own | |
2268 | * subclassed plane state structure. | |
2269 | */ | |
2270 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
321ebf04 | 2271 | struct drm_plane_state *state) |
d461701c | 2272 | { |
f5e7840b | 2273 | __drm_atomic_helper_plane_destroy_state(plane, state); |
d461701c DV |
2274 | kfree(state); |
2275 | } | |
2276 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
2277 | ||
2278 | /** | |
2279 | * drm_atomic_helper_connector_reset - default ->reset hook for connectors | |
2280 | * @connector: drm connector | |
2281 | * | |
2282 | * Resets the atomic state for @connector by freeing the state pointer (which | |
2283 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
2284 | * object. | |
2285 | */ | |
2286 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
2287 | { | |
2288 | kfree(connector->state); | |
2289 | connector->state = kzalloc(sizeof(*connector->state), GFP_KERNEL); | |
07cc0ef6 DV |
2290 | |
2291 | if (connector->state) | |
2292 | connector->state->connector = connector; | |
d461701c DV |
2293 | } |
2294 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
2295 | ||
f5e7840b TR |
2296 | /** |
2297 | * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state | |
2298 | * @connector: connector object | |
2299 | * @state: atomic connector state | |
2300 | * | |
2301 | * Copies atomic state from a connector's current state. This is useful for | |
2302 | * drivers that subclass the connector state. | |
2303 | */ | |
2304 | void | |
2305 | __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector, | |
2306 | struct drm_connector_state *state) | |
2307 | { | |
2308 | memcpy(state, connector->state, sizeof(*state)); | |
2309 | } | |
2310 | EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state); | |
2311 | ||
d461701c DV |
2312 | /** |
2313 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
2314 | * @connector: drm connector | |
2315 | * | |
2316 | * Default connector state duplicate hook for drivers which don't have their own | |
2317 | * subclassed connector state structure. | |
2318 | */ | |
2319 | struct drm_connector_state * | |
2320 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
2321 | { | |
f5e7840b TR |
2322 | struct drm_connector_state *state; |
2323 | ||
d461701c DV |
2324 | if (WARN_ON(!connector->state)) |
2325 | return NULL; | |
2326 | ||
f5e7840b TR |
2327 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2328 | if (state) | |
2329 | __drm_atomic_helper_connector_duplicate_state(connector, state); | |
2330 | ||
2331 | return state; | |
d461701c DV |
2332 | } |
2333 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
2334 | ||
f5e7840b TR |
2335 | /** |
2336 | * __drm_atomic_helper_connector_destroy_state - release connector state | |
2337 | * @connector: connector object | |
2338 | * @state: connector state object to release | |
2339 | * | |
2340 | * Releases all resources stored in the connector state without actually | |
2341 | * freeing the memory of the connector state. This is useful for drivers that | |
2342 | * subclass the connector state. | |
2343 | */ | |
2344 | void | |
2345 | __drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
2346 | struct drm_connector_state *state) | |
2347 | { | |
2348 | /* | |
2349 | * This is currently a placeholder so that drivers that subclass the | |
2350 | * state will automatically do the right thing if code is ever added | |
2351 | * to this function. | |
2352 | */ | |
2353 | } | |
2354 | EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state); | |
2355 | ||
d461701c DV |
2356 | /** |
2357 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
2358 | * @connector: drm connector | |
2359 | * @state: connector state object to release | |
2360 | * | |
2361 | * Default connector state destroy hook for drivers which don't have their own | |
2362 | * subclassed connector state structure. | |
2363 | */ | |
2364 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
2365 | struct drm_connector_state *state) | |
2366 | { | |
f5e7840b | 2367 | __drm_atomic_helper_connector_destroy_state(connector, state); |
d461701c DV |
2368 | kfree(state); |
2369 | } | |
2370 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); |