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c2fcd274 DV |
1 | /* |
2 | * Copyright (C) 2014 Red Hat | |
3 | * Copyright (C) 2014 Intel Corp. | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a | |
6 | * copy of this software and associated documentation files (the "Software"), | |
7 | * to deal in the Software without restriction, including without limitation | |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | * and/or sell copies of the Software, and to permit persons to whom the | |
10 | * Software is furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
21 | * OTHER DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Rob Clark <robdclark@gmail.com> | |
25 | * Daniel Vetter <daniel.vetter@ffwll.ch> | |
26 | */ | |
27 | ||
28 | #include <drm/drmP.h> | |
29 | #include <drm/drm_atomic.h> | |
30 | #include <drm/drm_plane_helper.h> | |
31 | #include <drm/drm_crtc_helper.h> | |
623369e5 | 32 | #include <drm/drm_atomic_helper.h> |
e2330f07 | 33 | #include <linux/fence.h> |
c2fcd274 | 34 | |
3150c7d0 DV |
35 | /** |
36 | * DOC: overview | |
37 | * | |
38 | * This helper library provides implementations of check and commit functions on | |
39 | * top of the CRTC modeset helper callbacks and the plane helper callbacks. It | |
40 | * also provides convenience implementations for the atomic state handling | |
41 | * callbacks for drivers which don't need to subclass the drm core structures to | |
42 | * add their own additional internal state. | |
43 | * | |
44 | * This library also provides default implementations for the check callback in | |
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. | |
092d01da DV |
55 | * |
56 | * The atomic helper uses the same function table structures as all other | |
57 | * modesetting helpers. See the documentation for struct &drm_crtc_helper_funcs, | |
58 | * struct &drm_encoder_helper_funcs and struct &drm_connector_helper_funcs. It | |
59 | * also shares the struct &drm_plane_helper_funcs function table with the plane | |
60 | * helpers. | |
3150c7d0 | 61 | */ |
c2fcd274 DV |
62 | static void |
63 | drm_atomic_helper_plane_changed(struct drm_atomic_state *state, | |
64 | struct drm_plane_state *plane_state, | |
65 | struct drm_plane *plane) | |
66 | { | |
67 | struct drm_crtc_state *crtc_state; | |
68 | ||
69 | if (plane->state->crtc) { | |
4b08eae5 | 70 | crtc_state = state->crtc_states[drm_crtc_index(plane->state->crtc)]; |
c2fcd274 DV |
71 | |
72 | if (WARN_ON(!crtc_state)) | |
73 | return; | |
74 | ||
75 | crtc_state->planes_changed = true; | |
76 | } | |
77 | ||
78 | if (plane_state->crtc) { | |
79 | crtc_state = | |
80 | state->crtc_states[drm_crtc_index(plane_state->crtc)]; | |
81 | ||
82 | if (WARN_ON(!crtc_state)) | |
83 | return; | |
84 | ||
85 | crtc_state->planes_changed = true; | |
86 | } | |
87 | } | |
88 | ||
97ac3204 DV |
89 | static bool |
90 | check_pending_encoder_assignment(struct drm_atomic_state *state, | |
07bad49e | 91 | struct drm_encoder *new_encoder) |
97ac3204 DV |
92 | { |
93 | struct drm_connector *connector; | |
94 | struct drm_connector_state *conn_state; | |
95 | int i; | |
96 | ||
97 | for_each_connector_in_state(state, connector, conn_state, i) { | |
98 | if (conn_state->best_encoder != new_encoder) | |
99 | continue; | |
100 | ||
101 | /* encoder already assigned and we're trying to re-steal it! */ | |
102 | if (connector->state->best_encoder != conn_state->best_encoder) | |
103 | return false; | |
104 | } | |
105 | ||
106 | return true; | |
107 | } | |
108 | ||
623369e5 DV |
109 | static struct drm_crtc * |
110 | get_current_crtc_for_encoder(struct drm_device *dev, | |
111 | struct drm_encoder *encoder) | |
112 | { | |
113 | struct drm_mode_config *config = &dev->mode_config; | |
114 | struct drm_connector *connector; | |
115 | ||
116 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
117 | ||
9a9f5ce8 | 118 | drm_for_each_connector(connector, dev) { |
623369e5 DV |
119 | if (connector->state->best_encoder != encoder) |
120 | continue; | |
121 | ||
122 | return connector->state->crtc; | |
123 | } | |
124 | ||
125 | return NULL; | |
126 | } | |
127 | ||
e87a52b3 ML |
128 | static void |
129 | set_best_encoder(struct drm_atomic_state *state, | |
130 | struct drm_connector_state *conn_state, | |
131 | struct drm_encoder *encoder) | |
132 | { | |
133 | struct drm_crtc_state *crtc_state; | |
134 | struct drm_crtc *crtc; | |
135 | ||
136 | if (conn_state->best_encoder) { | |
137 | /* Unset the encoder_mask in the old crtc state. */ | |
138 | crtc = conn_state->connector->state->crtc; | |
139 | ||
140 | /* A NULL crtc is an error here because we should have | |
141 | * duplicated a NULL best_encoder when crtc was NULL. | |
142 | * As an exception restoring duplicated atomic state | |
143 | * during resume is allowed, so don't warn when | |
144 | * best_encoder is equal to encoder we intend to set. | |
145 | */ | |
146 | WARN_ON(!crtc && encoder != conn_state->best_encoder); | |
147 | if (crtc) { | |
148 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); | |
149 | ||
150 | crtc_state->encoder_mask &= | |
151 | ~(1 << drm_encoder_index(conn_state->best_encoder)); | |
152 | } | |
153 | } | |
154 | ||
155 | if (encoder) { | |
156 | crtc = conn_state->crtc; | |
157 | WARN_ON(!crtc); | |
158 | if (crtc) { | |
159 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); | |
160 | ||
161 | crtc_state->encoder_mask |= | |
162 | 1 << drm_encoder_index(encoder); | |
163 | } | |
164 | } | |
165 | ||
166 | conn_state->best_encoder = encoder; | |
167 | } | |
168 | ||
623369e5 DV |
169 | static int |
170 | steal_encoder(struct drm_atomic_state *state, | |
171 | struct drm_encoder *encoder, | |
172 | struct drm_crtc *encoder_crtc) | |
173 | { | |
174 | struct drm_mode_config *config = &state->dev->mode_config; | |
175 | struct drm_crtc_state *crtc_state; | |
176 | struct drm_connector *connector; | |
177 | struct drm_connector_state *connector_state; | |
178 | ||
179 | /* | |
180 | * We can only steal an encoder coming from a connector, which means we | |
181 | * must already hold the connection_mutex. | |
182 | */ | |
183 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
184 | ||
fa3ab4c2 | 185 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n", |
17a38d9c | 186 | encoder->base.id, encoder->name, |
fa3ab4c2 | 187 | encoder_crtc->base.id, encoder_crtc->name); |
623369e5 DV |
188 | |
189 | crtc_state = drm_atomic_get_crtc_state(state, encoder_crtc); | |
190 | if (IS_ERR(crtc_state)) | |
191 | return PTR_ERR(crtc_state); | |
192 | ||
fc596660 | 193 | crtc_state->connectors_changed = true; |
623369e5 DV |
194 | |
195 | list_for_each_entry(connector, &config->connector_list, head) { | |
196 | if (connector->state->best_encoder != encoder) | |
197 | continue; | |
198 | ||
17a38d9c DV |
199 | DRM_DEBUG_ATOMIC("Stealing encoder from [CONNECTOR:%d:%s]\n", |
200 | connector->base.id, | |
201 | connector->name); | |
623369e5 DV |
202 | |
203 | connector_state = drm_atomic_get_connector_state(state, | |
204 | connector); | |
205 | if (IS_ERR(connector_state)) | |
206 | return PTR_ERR(connector_state); | |
207 | ||
e87a52b3 ML |
208 | if (connector_state->best_encoder != encoder) |
209 | continue; | |
210 | ||
211 | set_best_encoder(state, connector_state, NULL); | |
623369e5 DV |
212 | } |
213 | ||
214 | return 0; | |
215 | } | |
216 | ||
217 | static int | |
218 | update_connector_routing(struct drm_atomic_state *state, int conn_idx) | |
219 | { | |
b5ceff20 | 220 | const struct drm_connector_helper_funcs *funcs; |
623369e5 DV |
221 | struct drm_encoder *new_encoder; |
222 | struct drm_crtc *encoder_crtc; | |
223 | struct drm_connector *connector; | |
224 | struct drm_connector_state *connector_state; | |
225 | struct drm_crtc_state *crtc_state; | |
226 | int idx, ret; | |
227 | ||
228 | connector = state->connectors[conn_idx]; | |
229 | connector_state = state->connector_states[conn_idx]; | |
230 | ||
231 | if (!connector) | |
232 | return 0; | |
233 | ||
17a38d9c DV |
234 | DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n", |
235 | connector->base.id, | |
236 | connector->name); | |
623369e5 DV |
237 | |
238 | if (connector->state->crtc != connector_state->crtc) { | |
239 | if (connector->state->crtc) { | |
240 | idx = drm_crtc_index(connector->state->crtc); | |
241 | ||
242 | crtc_state = state->crtc_states[idx]; | |
fc596660 | 243 | crtc_state->connectors_changed = true; |
623369e5 DV |
244 | } |
245 | ||
246 | if (connector_state->crtc) { | |
247 | idx = drm_crtc_index(connector_state->crtc); | |
248 | ||
249 | crtc_state = state->crtc_states[idx]; | |
fc596660 | 250 | crtc_state->connectors_changed = true; |
623369e5 DV |
251 | } |
252 | } | |
253 | ||
254 | if (!connector_state->crtc) { | |
17a38d9c | 255 | DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n", |
623369e5 DV |
256 | connector->base.id, |
257 | connector->name); | |
258 | ||
e87a52b3 | 259 | set_best_encoder(state, connector_state, NULL); |
623369e5 DV |
260 | |
261 | return 0; | |
262 | } | |
263 | ||
264 | funcs = connector->helper_private; | |
3b8a684b DV |
265 | |
266 | if (funcs->atomic_best_encoder) | |
267 | new_encoder = funcs->atomic_best_encoder(connector, | |
268 | connector_state); | |
269 | else | |
270 | new_encoder = funcs->best_encoder(connector); | |
623369e5 DV |
271 | |
272 | if (!new_encoder) { | |
17a38d9c DV |
273 | DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", |
274 | connector->base.id, | |
275 | connector->name); | |
623369e5 DV |
276 | return -EINVAL; |
277 | } | |
278 | ||
5481c8fb DV |
279 | if (!drm_encoder_crtc_ok(new_encoder, connector_state->crtc)) { |
280 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d]\n", | |
281 | new_encoder->base.id, | |
282 | new_encoder->name, | |
283 | connector_state->crtc->base.id); | |
284 | return -EINVAL; | |
285 | } | |
286 | ||
623369e5 | 287 | if (new_encoder == connector_state->best_encoder) { |
e87a52b3 ML |
288 | set_best_encoder(state, connector_state, new_encoder); |
289 | ||
fa3ab4c2 | 290 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n", |
17a38d9c DV |
291 | connector->base.id, |
292 | connector->name, | |
293 | new_encoder->base.id, | |
294 | new_encoder->name, | |
fa3ab4c2 VS |
295 | connector_state->crtc->base.id, |
296 | connector_state->crtc->name); | |
623369e5 DV |
297 | |
298 | return 0; | |
299 | } | |
300 | ||
07bad49e | 301 | if (!check_pending_encoder_assignment(state, new_encoder)) { |
97ac3204 DV |
302 | DRM_DEBUG_ATOMIC("Encoder for [CONNECTOR:%d:%s] already assigned\n", |
303 | connector->base.id, | |
304 | connector->name); | |
305 | return -EINVAL; | |
306 | } | |
307 | ||
623369e5 DV |
308 | encoder_crtc = get_current_crtc_for_encoder(state->dev, |
309 | new_encoder); | |
310 | ||
311 | if (encoder_crtc) { | |
312 | ret = steal_encoder(state, new_encoder, encoder_crtc); | |
313 | if (ret) { | |
17a38d9c DV |
314 | DRM_DEBUG_ATOMIC("Encoder stealing failed for [CONNECTOR:%d:%s]\n", |
315 | connector->base.id, | |
316 | connector->name); | |
623369e5 DV |
317 | return ret; |
318 | } | |
319 | } | |
320 | ||
6ea76f3c DV |
321 | if (WARN_ON(!connector_state->crtc)) |
322 | return -EINVAL; | |
323 | ||
e87a52b3 ML |
324 | set_best_encoder(state, connector_state, new_encoder); |
325 | ||
623369e5 DV |
326 | idx = drm_crtc_index(connector_state->crtc); |
327 | ||
328 | crtc_state = state->crtc_states[idx]; | |
fc596660 | 329 | crtc_state->connectors_changed = true; |
623369e5 | 330 | |
fa3ab4c2 | 331 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n", |
17a38d9c DV |
332 | connector->base.id, |
333 | connector->name, | |
334 | new_encoder->base.id, | |
335 | new_encoder->name, | |
fa3ab4c2 VS |
336 | connector_state->crtc->base.id, |
337 | connector_state->crtc->name); | |
623369e5 DV |
338 | |
339 | return 0; | |
340 | } | |
341 | ||
342 | static int | |
343 | mode_fixup(struct drm_atomic_state *state) | |
344 | { | |
df63b999 | 345 | struct drm_crtc *crtc; |
623369e5 | 346 | struct drm_crtc_state *crtc_state; |
df63b999 | 347 | struct drm_connector *connector; |
623369e5 DV |
348 | struct drm_connector_state *conn_state; |
349 | int i; | |
350 | bool ret; | |
351 | ||
df63b999 | 352 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
fc596660 ML |
353 | if (!crtc_state->mode_changed && |
354 | !crtc_state->connectors_changed) | |
623369e5 DV |
355 | continue; |
356 | ||
357 | drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); | |
358 | } | |
359 | ||
df63b999 | 360 | for_each_connector_in_state(state, connector, conn_state, i) { |
b5ceff20 | 361 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
362 | struct drm_encoder *encoder; |
363 | ||
623369e5 DV |
364 | WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); |
365 | ||
366 | if (!conn_state->crtc || !conn_state->best_encoder) | |
367 | continue; | |
368 | ||
369 | crtc_state = | |
370 | state->crtc_states[drm_crtc_index(conn_state->crtc)]; | |
371 | ||
372 | /* | |
373 | * Each encoder has at most one connector (since we always steal | |
374 | * it away), so we won't call ->mode_fixup twice. | |
375 | */ | |
376 | encoder = conn_state->best_encoder; | |
377 | funcs = encoder->helper_private; | |
840bfe95 ACO |
378 | if (!funcs) |
379 | continue; | |
623369e5 | 380 | |
862e686c AT |
381 | ret = drm_bridge_mode_fixup(encoder->bridge, &crtc_state->mode, |
382 | &crtc_state->adjusted_mode); | |
383 | if (!ret) { | |
384 | DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); | |
385 | return -EINVAL; | |
623369e5 DV |
386 | } |
387 | ||
4cd4df80 TR |
388 | if (funcs->atomic_check) { |
389 | ret = funcs->atomic_check(encoder, crtc_state, | |
390 | conn_state); | |
391 | if (ret) { | |
17a38d9c DV |
392 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", |
393 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
394 | return ret; |
395 | } | |
84524917 | 396 | } else if (funcs->mode_fixup) { |
4cd4df80 TR |
397 | ret = funcs->mode_fixup(encoder, &crtc_state->mode, |
398 | &crtc_state->adjusted_mode); | |
399 | if (!ret) { | |
17a38d9c DV |
400 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", |
401 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
402 | return -EINVAL; |
403 | } | |
623369e5 DV |
404 | } |
405 | } | |
406 | ||
df63b999 | 407 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 408 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 409 | |
fc596660 ML |
410 | if (!crtc_state->mode_changed && |
411 | !crtc_state->connectors_changed) | |
623369e5 DV |
412 | continue; |
413 | ||
414 | funcs = crtc->helper_private; | |
840bfe95 ACO |
415 | if (!funcs->mode_fixup) |
416 | continue; | |
417 | ||
623369e5 DV |
418 | ret = funcs->mode_fixup(crtc, &crtc_state->mode, |
419 | &crtc_state->adjusted_mode); | |
420 | if (!ret) { | |
fa3ab4c2 VS |
421 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n", |
422 | crtc->base.id, crtc->name); | |
623369e5 DV |
423 | return -EINVAL; |
424 | } | |
425 | } | |
426 | ||
427 | return 0; | |
428 | } | |
429 | ||
d9b13620 | 430 | /** |
f98bd3ef | 431 | * drm_atomic_helper_check_modeset - validate state object for modeset changes |
d9b13620 DV |
432 | * @dev: DRM device |
433 | * @state: the driver state object | |
434 | * | |
435 | * Check the state object to see if the requested state is physically possible. | |
436 | * This does all the crtc and connector related computations for an atomic | |
fc596660 ML |
437 | * update and adds any additional connectors needed for full modesets and calls |
438 | * down into ->mode_fixup functions of the driver backend. | |
439 | * | |
440 | * crtc_state->mode_changed is set when the input mode is changed. | |
441 | * crtc_state->connectors_changed is set when a connector is added or | |
442 | * removed from the crtc. | |
443 | * crtc_state->active_changed is set when crtc_state->active changes, | |
444 | * which is used for dpms. | |
d9b13620 DV |
445 | * |
446 | * IMPORTANT: | |
447 | * | |
448 | * Drivers which update ->mode_changed (e.g. in their ->atomic_check hooks if a | |
449 | * plane update can't be done without a full modeset) _must_ call this function | |
450 | * afterwards after that change. It is permitted to call this function multiple | |
451 | * times for the same update, e.g. when the ->atomic_check functions depend upon | |
452 | * the adjusted dotclock for fifo space allocation and watermark computation. | |
453 | * | |
454 | * RETURNS | |
455 | * Zero for success or -errno | |
456 | */ | |
457 | int | |
934ce1c2 | 458 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
459 | struct drm_atomic_state *state) |
460 | { | |
623369e5 DV |
461 | struct drm_crtc *crtc; |
462 | struct drm_crtc_state *crtc_state; | |
df63b999 ACO |
463 | struct drm_connector *connector; |
464 | struct drm_connector_state *connector_state; | |
623369e5 DV |
465 | int i, ret; |
466 | ||
df63b999 | 467 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 | 468 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { |
fa3ab4c2 VS |
469 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n", |
470 | crtc->base.id, crtc->name); | |
623369e5 DV |
471 | crtc_state->mode_changed = true; |
472 | } | |
473 | ||
474 | if (crtc->state->enable != crtc_state->enable) { | |
fa3ab4c2 VS |
475 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n", |
476 | crtc->base.id, crtc->name); | |
fc596660 ML |
477 | |
478 | /* | |
479 | * For clarity this assignment is done here, but | |
480 | * enable == 0 is only true when there are no | |
481 | * connectors and a NULL mode. | |
482 | * | |
483 | * The other way around is true as well. enable != 0 | |
484 | * iff connectors are attached and a mode is set. | |
485 | */ | |
623369e5 | 486 | crtc_state->mode_changed = true; |
fc596660 | 487 | crtc_state->connectors_changed = true; |
623369e5 DV |
488 | } |
489 | } | |
490 | ||
df63b999 | 491 | for_each_connector_in_state(state, connector, connector_state, i) { |
623369e5 DV |
492 | /* |
493 | * This only sets crtc->mode_changed for routing changes, | |
494 | * drivers must set crtc->mode_changed themselves when connector | |
495 | * properties need to be updated. | |
496 | */ | |
497 | ret = update_connector_routing(state, i); | |
498 | if (ret) | |
499 | return ret; | |
500 | } | |
501 | ||
502 | /* | |
503 | * After all the routing has been prepared we need to add in any | |
504 | * connector which is itself unchanged, but who's crtc changes it's | |
505 | * configuration. This must be done before calling mode_fixup in case a | |
506 | * crtc only changed its mode but has the same set of connectors. | |
507 | */ | |
df63b999 | 508 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
14de6c44 ML |
509 | bool has_connectors = |
510 | !!crtc_state->connector_mask; | |
623369e5 | 511 | |
eab3bbef DV |
512 | /* |
513 | * We must set ->active_changed after walking connectors for | |
514 | * otherwise an update that only changes active would result in | |
515 | * a full modeset because update_connector_routing force that. | |
516 | */ | |
517 | if (crtc->state->active != crtc_state->active) { | |
fa3ab4c2 VS |
518 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", |
519 | crtc->base.id, crtc->name); | |
eab3bbef DV |
520 | crtc_state->active_changed = true; |
521 | } | |
522 | ||
2465ff62 | 523 | if (!drm_atomic_crtc_needs_modeset(crtc_state)) |
623369e5 DV |
524 | continue; |
525 | ||
fa3ab4c2 VS |
526 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n", |
527 | crtc->base.id, crtc->name, | |
17a38d9c | 528 | crtc_state->enable ? 'y' : 'n', |
fa3ab4c2 | 529 | crtc_state->active ? 'y' : 'n'); |
623369e5 DV |
530 | |
531 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
532 | if (ret != 0) | |
533 | return ret; | |
534 | ||
57744aa7 ML |
535 | ret = drm_atomic_add_affected_planes(state, crtc); |
536 | if (ret != 0) | |
537 | return ret; | |
538 | ||
14de6c44 | 539 | if (crtc_state->enable != has_connectors) { |
fa3ab4c2 VS |
540 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", |
541 | crtc->base.id, crtc->name); | |
623369e5 DV |
542 | |
543 | return -EINVAL; | |
544 | } | |
545 | } | |
546 | ||
547 | return mode_fixup(state); | |
548 | } | |
d9b13620 | 549 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 550 | |
c2fcd274 | 551 | /** |
f98bd3ef | 552 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
553 | * @dev: DRM device |
554 | * @state: the driver state object | |
555 | * | |
556 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 DV |
557 | * This does all the plane update related checks using by calling into the |
558 | * ->atomic_check hooks provided by the driver. | |
c2fcd274 | 559 | * |
fc596660 ML |
560 | * It also sets crtc_state->planes_changed to indicate that a crtc has |
561 | * updated planes. | |
562 | * | |
c2fcd274 DV |
563 | * RETURNS |
564 | * Zero for success or -errno | |
565 | */ | |
d9b13620 DV |
566 | int |
567 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
568 | struct drm_atomic_state *state) | |
c2fcd274 | 569 | { |
df63b999 ACO |
570 | struct drm_crtc *crtc; |
571 | struct drm_crtc_state *crtc_state; | |
572 | struct drm_plane *plane; | |
573 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
574 | int i, ret = 0; |
575 | ||
df63b999 | 576 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 577 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
578 | |
579 | funcs = plane->helper_private; | |
580 | ||
581 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
582 | ||
583 | if (!funcs || !funcs->atomic_check) | |
584 | continue; | |
585 | ||
586 | ret = funcs->atomic_check(plane, plane_state); | |
587 | if (ret) { | |
9f4c97a2 VS |
588 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n", |
589 | plane->base.id, plane->name); | |
c2fcd274 DV |
590 | return ret; |
591 | } | |
592 | } | |
593 | ||
df63b999 | 594 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 595 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
596 | |
597 | funcs = crtc->helper_private; | |
598 | ||
599 | if (!funcs || !funcs->atomic_check) | |
600 | continue; | |
601 | ||
602 | ret = funcs->atomic_check(crtc, state->crtc_states[i]); | |
603 | if (ret) { | |
fa3ab4c2 VS |
604 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n", |
605 | crtc->base.id, crtc->name); | |
c2fcd274 DV |
606 | return ret; |
607 | } | |
608 | } | |
609 | ||
d9b13620 DV |
610 | return ret; |
611 | } | |
612 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
613 | ||
614 | /** | |
615 | * drm_atomic_helper_check - validate state object | |
616 | * @dev: DRM device | |
617 | * @state: the driver state object | |
618 | * | |
619 | * Check the state object to see if the requested state is physically possible. | |
620 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
621 | * checking that a driver needs it can simply wrap that around this function. | |
622 | * Drivers without such needs can directly use this as their ->atomic_check() | |
623 | * callback. | |
624 | * | |
b4274fbe DV |
625 | * This just wraps the two parts of the state checking for planes and modeset |
626 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
627 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
628 | * ->atomic_check functions depend upon an updated adjusted_mode.clock to | |
629 | * e.g. properly compute watermarks. | |
630 | * | |
d9b13620 DV |
631 | * RETURNS |
632 | * Zero for success or -errno | |
633 | */ | |
634 | int drm_atomic_helper_check(struct drm_device *dev, | |
635 | struct drm_atomic_state *state) | |
636 | { | |
637 | int ret; | |
638 | ||
b4274fbe | 639 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
640 | if (ret) |
641 | return ret; | |
642 | ||
b4274fbe | 643 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
644 | if (ret) |
645 | return ret; | |
646 | ||
c2fcd274 DV |
647 | return ret; |
648 | } | |
649 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
650 | ||
623369e5 DV |
651 | static void |
652 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
653 | { | |
df63b999 ACO |
654 | struct drm_connector *connector; |
655 | struct drm_connector_state *old_conn_state; | |
656 | struct drm_crtc *crtc; | |
657 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
658 | int i; |
659 | ||
df63b999 | 660 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 661 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
662 | struct drm_encoder *encoder; |
663 | ||
623369e5 DV |
664 | /* Shut down everything that's in the changeset and currently |
665 | * still on. So need to check the old, saved state. */ | |
df63b999 | 666 | if (!old_conn_state->crtc) |
623369e5 DV |
667 | continue; |
668 | ||
eab3bbef DV |
669 | old_crtc_state = old_state->crtc_states[drm_crtc_index(old_conn_state->crtc)]; |
670 | ||
4218a32f | 671 | if (!old_crtc_state->active || |
2465ff62 | 672 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) |
eab3bbef DV |
673 | continue; |
674 | ||
46df9adb | 675 | encoder = old_conn_state->best_encoder; |
623369e5 | 676 | |
46df9adb RC |
677 | /* We shouldn't get this far if we didn't previously have |
678 | * an encoder.. but WARN_ON() rather than explode. | |
679 | */ | |
680 | if (WARN_ON(!encoder)) | |
623369e5 DV |
681 | continue; |
682 | ||
683 | funcs = encoder->helper_private; | |
684 | ||
17a38d9c DV |
685 | DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
686 | encoder->base.id, encoder->name); | |
95d6eb3b | 687 | |
623369e5 DV |
688 | /* |
689 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 690 | * it away), so we won't call disable hooks twice. |
623369e5 | 691 | */ |
862e686c | 692 | drm_bridge_disable(encoder->bridge); |
623369e5 DV |
693 | |
694 | /* Right function depends upon target state. */ | |
ee0a89cf | 695 | if (connector->state->crtc && funcs->prepare) |
623369e5 DV |
696 | funcs->prepare(encoder); |
697 | else if (funcs->disable) | |
698 | funcs->disable(encoder); | |
699 | else | |
700 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
701 | ||
862e686c | 702 | drm_bridge_post_disable(encoder->bridge); |
623369e5 DV |
703 | } |
704 | ||
df63b999 | 705 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 706 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
707 | |
708 | /* Shut down everything that needs a full modeset. */ | |
2465ff62 | 709 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
710 | continue; |
711 | ||
712 | if (!old_crtc_state->active) | |
623369e5 DV |
713 | continue; |
714 | ||
715 | funcs = crtc->helper_private; | |
716 | ||
fa3ab4c2 VS |
717 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n", |
718 | crtc->base.id, crtc->name); | |
95d6eb3b DV |
719 | |
720 | ||
623369e5 | 721 | /* Right function depends upon target state. */ |
ee0a89cf | 722 | if (crtc->state->enable && funcs->prepare) |
623369e5 DV |
723 | funcs->prepare(crtc); |
724 | else if (funcs->disable) | |
725 | funcs->disable(crtc); | |
726 | else | |
727 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
728 | } | |
729 | } | |
730 | ||
4c18d301 DV |
731 | /** |
732 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state | |
733 | * @dev: DRM device | |
734 | * @old_state: atomic state object with old state structures | |
735 | * | |
736 | * This function updates all the various legacy modeset state pointers in | |
737 | * connectors, encoders and crtcs. It also updates the timestamping constants | |
738 | * used for precise vblank timestamps by calling | |
739 | * drm_calc_timestamping_constants(). | |
740 | * | |
741 | * Drivers can use this for building their own atomic commit if they don't have | |
742 | * a pure helper-based modeset implementation. | |
743 | */ | |
744 | void | |
745 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, | |
746 | struct drm_atomic_state *old_state) | |
623369e5 | 747 | { |
df63b999 ACO |
748 | struct drm_connector *connector; |
749 | struct drm_connector_state *old_conn_state; | |
750 | struct drm_crtc *crtc; | |
751 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
752 | int i; |
753 | ||
8c10342c | 754 | /* clear out existing links and update dpms */ |
df63b999 | 755 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
8c10342c ML |
756 | if (connector->encoder) { |
757 | WARN_ON(!connector->encoder->crtc); | |
758 | ||
759 | connector->encoder->crtc = NULL; | |
760 | connector->encoder = NULL; | |
761 | } | |
623369e5 | 762 | |
8c10342c ML |
763 | crtc = connector->state->crtc; |
764 | if ((!crtc && old_conn_state->crtc) || | |
765 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { | |
766 | struct drm_property *dpms_prop = | |
767 | dev->mode_config.dpms_property; | |
768 | int mode = DRM_MODE_DPMS_OFF; | |
623369e5 | 769 | |
8c10342c ML |
770 | if (crtc && crtc->state->active) |
771 | mode = DRM_MODE_DPMS_ON; | |
772 | ||
773 | connector->dpms = mode; | |
774 | drm_object_property_set_value(&connector->base, | |
775 | dpms_prop, mode); | |
776 | } | |
623369e5 DV |
777 | } |
778 | ||
779 | /* set new links */ | |
df63b999 ACO |
780 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
781 | if (!connector->state->crtc) | |
623369e5 DV |
782 | continue; |
783 | ||
784 | if (WARN_ON(!connector->state->best_encoder)) | |
785 | continue; | |
786 | ||
787 | connector->encoder = connector->state->best_encoder; | |
788 | connector->encoder->crtc = connector->state->crtc; | |
789 | } | |
790 | ||
791 | /* set legacy state in the crtc structure */ | |
df63b999 | 792 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
2660801f ML |
793 | struct drm_plane *primary = crtc->primary; |
794 | ||
623369e5 DV |
795 | crtc->mode = crtc->state->mode; |
796 | crtc->enabled = crtc->state->enable; | |
2660801f ML |
797 | |
798 | if (drm_atomic_get_existing_plane_state(old_state, primary) && | |
799 | primary->state->crtc == crtc) { | |
800 | crtc->x = primary->state->src_x >> 16; | |
801 | crtc->y = primary->state->src_y >> 16; | |
802 | } | |
3d51d2d2 DV |
803 | |
804 | if (crtc->state->enable) | |
805 | drm_calc_timestamping_constants(crtc, | |
806 | &crtc->state->adjusted_mode); | |
623369e5 DV |
807 | } |
808 | } | |
4c18d301 | 809 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); |
623369e5 DV |
810 | |
811 | static void | |
812 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
813 | { | |
df63b999 ACO |
814 | struct drm_crtc *crtc; |
815 | struct drm_crtc_state *old_crtc_state; | |
816 | struct drm_connector *connector; | |
817 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
818 | int i; |
819 | ||
df63b999 | 820 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 821 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 822 | |
df63b999 | 823 | if (!crtc->state->mode_changed) |
623369e5 DV |
824 | continue; |
825 | ||
826 | funcs = crtc->helper_private; | |
827 | ||
c982bd90 | 828 | if (crtc->state->enable && funcs->mode_set_nofb) { |
fa3ab4c2 VS |
829 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n", |
830 | crtc->base.id, crtc->name); | |
95d6eb3b | 831 | |
623369e5 | 832 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 833 | } |
623369e5 DV |
834 | } |
835 | ||
df63b999 | 836 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 837 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 838 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
839 | struct drm_encoder *encoder; |
840 | struct drm_display_mode *mode, *adjusted_mode; | |
841 | ||
df63b999 | 842 | if (!connector->state->best_encoder) |
623369e5 DV |
843 | continue; |
844 | ||
845 | encoder = connector->state->best_encoder; | |
846 | funcs = encoder->helper_private; | |
847 | new_crtc_state = connector->state->crtc->state; | |
848 | mode = &new_crtc_state->mode; | |
849 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
850 | ||
eab3bbef DV |
851 | if (!new_crtc_state->mode_changed) |
852 | continue; | |
853 | ||
17a38d9c DV |
854 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
855 | encoder->base.id, encoder->name); | |
95d6eb3b | 856 | |
623369e5 DV |
857 | /* |
858 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 859 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 860 | */ |
c982bd90 DV |
861 | if (funcs->mode_set) |
862 | funcs->mode_set(encoder, mode, adjusted_mode); | |
623369e5 | 863 | |
862e686c | 864 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
623369e5 DV |
865 | } |
866 | } | |
867 | ||
868 | /** | |
1af434a9 | 869 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 870 | * @dev: DRM device |
a072f809 | 871 | * @old_state: atomic state object with old state structures |
623369e5 | 872 | * |
1af434a9 | 873 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 874 | * prepares them (if required) with the new mode. |
1af434a9 | 875 | * |
60acc4eb | 876 | * For compatibility with legacy crtc helpers this should be called before |
1af434a9 DV |
877 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
878 | * does. But drivers with different needs can group the modeset commits together | |
879 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
880 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 881 | */ |
1af434a9 DV |
882 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
883 | struct drm_atomic_state *old_state) | |
623369e5 | 884 | { |
a072f809 | 885 | disable_outputs(dev, old_state); |
4c18d301 DV |
886 | |
887 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); | |
888 | ||
a072f809 | 889 | crtc_set_mode(dev, old_state); |
623369e5 | 890 | } |
1af434a9 | 891 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 DV |
892 | |
893 | /** | |
1af434a9 | 894 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
895 | * @dev: DRM device |
896 | * @old_state: atomic state object with old state structures | |
897 | * | |
1af434a9 DV |
898 | * This function enables all the outputs with the new configuration which had to |
899 | * be turned off for the update. | |
900 | * | |
60acc4eb | 901 | * For compatibility with legacy crtc helpers this should be called after |
1af434a9 DV |
902 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
903 | * does. But drivers with different needs can group the modeset commits together | |
904 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
905 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 906 | */ |
1af434a9 DV |
907 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
908 | struct drm_atomic_state *old_state) | |
623369e5 | 909 | { |
df63b999 ACO |
910 | struct drm_crtc *crtc; |
911 | struct drm_crtc_state *old_crtc_state; | |
912 | struct drm_connector *connector; | |
913 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
914 | int i; |
915 | ||
df63b999 | 916 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 917 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
918 | |
919 | /* Need to filter out CRTCs where only planes change. */ | |
2465ff62 | 920 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
921 | continue; |
922 | ||
923 | if (!crtc->state->active) | |
623369e5 DV |
924 | continue; |
925 | ||
926 | funcs = crtc->helper_private; | |
927 | ||
ee0a89cf | 928 | if (crtc->state->enable) { |
fa3ab4c2 VS |
929 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n", |
930 | crtc->base.id, crtc->name); | |
95d6eb3b | 931 | |
ee0a89cf DV |
932 | if (funcs->enable) |
933 | funcs->enable(crtc); | |
934 | else | |
935 | funcs->commit(crtc); | |
936 | } | |
623369e5 DV |
937 | } |
938 | ||
df63b999 | 939 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 940 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
941 | struct drm_encoder *encoder; |
942 | ||
df63b999 | 943 | if (!connector->state->best_encoder) |
623369e5 DV |
944 | continue; |
945 | ||
4218a32f | 946 | if (!connector->state->crtc->state->active || |
2465ff62 | 947 | !drm_atomic_crtc_needs_modeset(connector->state->crtc->state)) |
eab3bbef DV |
948 | continue; |
949 | ||
623369e5 DV |
950 | encoder = connector->state->best_encoder; |
951 | funcs = encoder->helper_private; | |
952 | ||
17a38d9c DV |
953 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
954 | encoder->base.id, encoder->name); | |
95d6eb3b | 955 | |
623369e5 DV |
956 | /* |
957 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 958 | * it away), so we won't call enable hooks twice. |
623369e5 | 959 | */ |
862e686c | 960 | drm_bridge_pre_enable(encoder->bridge); |
623369e5 | 961 | |
ee0a89cf DV |
962 | if (funcs->enable) |
963 | funcs->enable(encoder); | |
964 | else | |
965 | funcs->commit(encoder); | |
623369e5 | 966 | |
862e686c | 967 | drm_bridge_enable(encoder->bridge); |
623369e5 DV |
968 | } |
969 | } | |
1af434a9 | 970 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 971 | |
e2330f07 DV |
972 | static void wait_for_fences(struct drm_device *dev, |
973 | struct drm_atomic_state *state) | |
974 | { | |
df63b999 ACO |
975 | struct drm_plane *plane; |
976 | struct drm_plane_state *plane_state; | |
e2330f07 DV |
977 | int i; |
978 | ||
df63b999 ACO |
979 | for_each_plane_in_state(state, plane, plane_state, i) { |
980 | if (!plane->state->fence) | |
e2330f07 DV |
981 | continue; |
982 | ||
983 | WARN_ON(!plane->state->fb); | |
984 | ||
985 | fence_wait(plane->state->fence, false); | |
986 | fence_put(plane->state->fence); | |
987 | plane->state->fence = NULL; | |
988 | } | |
989 | } | |
990 | ||
c240906d JK |
991 | /** |
992 | * drm_atomic_helper_framebuffer_changed - check if framebuffer has changed | |
993 | * @dev: DRM device | |
994 | * @old_state: atomic state object with old state structures | |
995 | * @crtc: DRM crtc | |
996 | * | |
997 | * Checks whether the framebuffer used for this CRTC changes as a result of | |
998 | * the atomic update. This is useful for drivers which cannot use | |
999 | * drm_atomic_helper_wait_for_vblanks() and need to reimplement its | |
1000 | * functionality. | |
1001 | * | |
1002 | * Returns: | |
1003 | * true if the framebuffer changed. | |
1004 | */ | |
1005 | bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev, | |
1006 | struct drm_atomic_state *old_state, | |
1007 | struct drm_crtc *crtc) | |
ab58e338 DV |
1008 | { |
1009 | struct drm_plane *plane; | |
1010 | struct drm_plane_state *old_plane_state; | |
ab58e338 DV |
1011 | int i; |
1012 | ||
df63b999 | 1013 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
ab58e338 DV |
1014 | if (plane->state->crtc != crtc && |
1015 | old_plane_state->crtc != crtc) | |
1016 | continue; | |
1017 | ||
1018 | if (plane->state->fb != old_plane_state->fb) | |
1019 | return true; | |
1020 | } | |
1021 | ||
1022 | return false; | |
1023 | } | |
c240906d | 1024 | EXPORT_SYMBOL(drm_atomic_helper_framebuffer_changed); |
ab58e338 | 1025 | |
5ee3229c RC |
1026 | /** |
1027 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
1028 | * @dev: DRM device | |
1029 | * @old_state: atomic state object with old state structures | |
1030 | * | |
1031 | * Helper to, after atomic commit, wait for vblanks on all effected | |
1032 | * crtcs (ie. before cleaning up old framebuffers using | |
ab58e338 DV |
1033 | * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
1034 | * framebuffers have actually changed to optimize for the legacy cursor and | |
1035 | * plane update use-case. | |
5ee3229c RC |
1036 | */ |
1037 | void | |
1038 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
1039 | struct drm_atomic_state *old_state) | |
623369e5 DV |
1040 | { |
1041 | struct drm_crtc *crtc; | |
1042 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
1043 | int i, ret; |
1044 | ||
df63b999 | 1045 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
623369e5 DV |
1046 | /* No one cares about the old state, so abuse it for tracking |
1047 | * and store whether we hold a vblank reference (and should do a | |
1048 | * vblank wait) in the ->enable boolean. */ | |
1049 | old_crtc_state->enable = false; | |
1050 | ||
1051 | if (!crtc->state->enable) | |
1052 | continue; | |
1053 | ||
f02ad907 DV |
1054 | /* Legacy cursor ioctls are completely unsynced, and userspace |
1055 | * relies on that (by doing tons of cursor updates). */ | |
1056 | if (old_state->legacy_cursor_update) | |
1057 | continue; | |
1058 | ||
c240906d JK |
1059 | if (!drm_atomic_helper_framebuffer_changed(dev, |
1060 | old_state, crtc)) | |
ab58e338 DV |
1061 | continue; |
1062 | ||
623369e5 DV |
1063 | ret = drm_crtc_vblank_get(crtc); |
1064 | if (ret != 0) | |
1065 | continue; | |
1066 | ||
1067 | old_crtc_state->enable = true; | |
d4853630 | 1068 | old_crtc_state->last_vblank_count = drm_crtc_vblank_count(crtc); |
623369e5 DV |
1069 | } |
1070 | ||
df63b999 ACO |
1071 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
1072 | if (!old_crtc_state->enable) | |
623369e5 DV |
1073 | continue; |
1074 | ||
1075 | ret = wait_event_timeout(dev->vblank[i].queue, | |
1076 | old_crtc_state->last_vblank_count != | |
d4853630 | 1077 | drm_crtc_vblank_count(crtc), |
623369e5 DV |
1078 | msecs_to_jiffies(50)); |
1079 | ||
1080 | drm_crtc_vblank_put(crtc); | |
1081 | } | |
1082 | } | |
5ee3229c | 1083 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 DV |
1084 | |
1085 | /** | |
1086 | * drm_atomic_helper_commit - commit validated state object | |
1087 | * @dev: DRM device | |
1088 | * @state: the driver state object | |
1089 | * @async: asynchronous commit | |
1090 | * | |
1091 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
1092 | * object. This can still fail when e.g. the framebuffer reservation fails. For | |
1093 | * now this doesn't implement asynchronous commits. | |
1094 | * | |
6e48ae32 DV |
1095 | * Note that right now this function does not support async commits, and hence |
1096 | * driver writers must implement their own version for now. Also note that the | |
1097 | * default ordering of how the various stages are called is to match the legacy | |
1098 | * modeset helper library closest. One peculiarity of that is that it doesn't | |
1099 | * mesh well with runtime PM at all. | |
1100 | * | |
1101 | * For drivers supporting runtime PM the recommended sequence is | |
1102 | * | |
1103 | * drm_atomic_helper_commit_modeset_disables(dev, state); | |
1104 | * | |
1105 | * drm_atomic_helper_commit_modeset_enables(dev, state); | |
1106 | * | |
1107 | * drm_atomic_helper_commit_planes(dev, state, true); | |
1108 | * | |
1109 | * See the kerneldoc entries for these three functions for more details. | |
1110 | * | |
623369e5 DV |
1111 | * RETURNS |
1112 | * Zero for success or -errno. | |
1113 | */ | |
1114 | int drm_atomic_helper_commit(struct drm_device *dev, | |
1115 | struct drm_atomic_state *state, | |
1116 | bool async) | |
1117 | { | |
1118 | int ret; | |
1119 | ||
1120 | if (async) | |
1121 | return -EBUSY; | |
1122 | ||
1123 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
1124 | if (ret) | |
1125 | return ret; | |
1126 | ||
1127 | /* | |
1128 | * This is the point of no return - everything below never fails except | |
1129 | * when the hw goes bonghits. Which means we can commit the new state on | |
1130 | * the software side now. | |
1131 | */ | |
1132 | ||
1133 | drm_atomic_helper_swap_state(dev, state); | |
1134 | ||
1135 | /* | |
1136 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 1137 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
1138 | * that the asynchronous work has either been cancelled (if the driver |
1139 | * supports it, which at least requires that the framebuffers get | |
1140 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
1141 | * before the new state gets committed on the software side with | |
1142 | * drm_atomic_helper_swap_state(). | |
1143 | * | |
1144 | * This scheme allows new atomic state updates to be prepared and | |
1145 | * checked in parallel to the asynchronous completion of the previous | |
1146 | * update. Which is important since compositors need to figure out the | |
1147 | * composition of the next frame right after having submitted the | |
1148 | * current layout. | |
1149 | */ | |
1150 | ||
e2330f07 DV |
1151 | wait_for_fences(dev, state); |
1152 | ||
1af434a9 | 1153 | drm_atomic_helper_commit_modeset_disables(dev, state); |
623369e5 | 1154 | |
aef9dbb8 | 1155 | drm_atomic_helper_commit_planes(dev, state, false); |
623369e5 | 1156 | |
1af434a9 | 1157 | drm_atomic_helper_commit_modeset_enables(dev, state); |
623369e5 | 1158 | |
5ee3229c | 1159 | drm_atomic_helper_wait_for_vblanks(dev, state); |
623369e5 DV |
1160 | |
1161 | drm_atomic_helper_cleanup_planes(dev, state); | |
1162 | ||
1163 | drm_atomic_state_free(state); | |
1164 | ||
1165 | return 0; | |
1166 | } | |
1167 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1168 | ||
e8c833a7 DV |
1169 | /** |
1170 | * DOC: implementing async commit | |
1171 | * | |
1172 | * For now the atomic helpers don't support async commit directly. If there is | |
1173 | * real need it could be added though, using the dma-buf fence infrastructure | |
1174 | * for generic synchronization with outstanding rendering. | |
1175 | * | |
1176 | * For now drivers have to implement async commit themselves, with the following | |
1177 | * sequence being the recommended one: | |
1178 | * | |
1179 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
1180 | * which commit needs to call which can fail, so we want to run it first and | |
1181 | * synchronously. | |
1182 | * | |
1183 | * 2. Synchronize with any outstanding asynchronous commit worker threads which | |
1184 | * might be affected the new state update. This can be done by either cancelling | |
1185 | * or flushing the work items, depending upon whether the driver can deal with | |
1186 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
1187 | * cleanup is still done when cancelling. | |
1188 | * | |
1189 | * For sufficient parallelism it is recommended to have a work item per crtc | |
1190 | * (for updates which don't touch global state) and a global one. Then we only | |
1191 | * need to synchronize with the crtc work items for changed crtcs and the global | |
1192 | * work item, which allows nice concurrent updates on disjoint sets of crtcs. | |
1193 | * | |
1194 | * 3. The software state is updated synchronously with | |
26196f7e | 1195 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
e8c833a7 DV |
1196 | * locks means concurrent callers never see inconsistent state. And doing this |
1197 | * while it's guaranteed that no relevant async worker runs means that async | |
1198 | * workers do not need grab any locks. Actually they must not grab locks, for | |
1199 | * otherwise the work flushing will deadlock. | |
1200 | * | |
1201 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1202 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1203 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
1204 | * being displayed. | |
1205 | */ | |
1206 | ||
c2fcd274 | 1207 | /** |
2e3afd47 | 1208 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 1209 | * @dev: DRM device |
2e3afd47 | 1210 | * @state: atomic state object with new state structures |
c2fcd274 DV |
1211 | * |
1212 | * This function prepares plane state, specifically framebuffers, for the new | |
1213 | * configuration. If any failure is encountered this function will call | |
1214 | * ->cleanup_fb on any already successfully prepared framebuffer. | |
1215 | * | |
1216 | * Returns: | |
1217 | * 0 on success, negative error code on failure. | |
1218 | */ | |
1219 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
1220 | struct drm_atomic_state *state) | |
1221 | { | |
1222 | int nplanes = dev->mode_config.num_total_plane; | |
1223 | int ret, i; | |
1224 | ||
1225 | for (i = 0; i < nplanes; i++) { | |
b5ceff20 | 1226 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1227 | struct drm_plane *plane = state->planes[i]; |
d136dfee | 1228 | struct drm_plane_state *plane_state = state->plane_states[i]; |
c2fcd274 DV |
1229 | |
1230 | if (!plane) | |
1231 | continue; | |
1232 | ||
1233 | funcs = plane->helper_private; | |
1234 | ||
844f9111 ML |
1235 | if (funcs->prepare_fb) { |
1236 | ret = funcs->prepare_fb(plane, plane_state); | |
c2fcd274 DV |
1237 | if (ret) |
1238 | goto fail; | |
1239 | } | |
1240 | } | |
1241 | ||
1242 | return 0; | |
1243 | ||
1244 | fail: | |
1245 | for (i--; i >= 0; i--) { | |
b5ceff20 | 1246 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1247 | struct drm_plane *plane = state->planes[i]; |
d136dfee | 1248 | struct drm_plane_state *plane_state = state->plane_states[i]; |
c2fcd274 DV |
1249 | |
1250 | if (!plane) | |
1251 | continue; | |
1252 | ||
1253 | funcs = plane->helper_private; | |
1254 | ||
844f9111 ML |
1255 | if (funcs->cleanup_fb) |
1256 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1257 | |
1258 | } | |
1259 | ||
1260 | return ret; | |
1261 | } | |
1262 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
1263 | ||
aef9dbb8 DV |
1264 | bool plane_crtc_active(struct drm_plane_state *state) |
1265 | { | |
1266 | return state->crtc && state->crtc->state->active; | |
1267 | } | |
1268 | ||
c2fcd274 DV |
1269 | /** |
1270 | * drm_atomic_helper_commit_planes - commit plane state | |
1271 | * @dev: DRM device | |
b0fcfc89 | 1272 | * @old_state: atomic state object with old state structures |
aef9dbb8 | 1273 | * @active_only: Only commit on active CRTC if set |
c2fcd274 DV |
1274 | * |
1275 | * This function commits the new plane state using the plane and atomic helper | |
1276 | * functions for planes and crtcs. It assumes that the atomic state has already | |
1277 | * been pushed into the relevant object state pointers, since this step can no | |
1278 | * longer fail. | |
1279 | * | |
b0fcfc89 | 1280 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 | 1281 | * crtcs need to be updated though. |
de28d021 ML |
1282 | * |
1283 | * Note that this function does all plane updates across all CRTCs in one step. | |
1284 | * If the hardware can't support this approach look at | |
1285 | * drm_atomic_helper_commit_planes_on_crtc() instead. | |
6e48ae32 DV |
1286 | * |
1287 | * Plane parameters can be updated by applications while the associated CRTC is | |
1288 | * disabled. The DRM/KMS core will store the parameters in the plane state, | |
1289 | * which will be available to the driver when the CRTC is turned on. As a result | |
1290 | * most drivers don't need to be immediately notified of plane updates for a | |
1291 | * disabled CRTC. | |
1292 | * | |
1293 | * Unless otherwise needed, drivers are advised to set the @active_only | |
1294 | * parameters to true in order not to receive plane update notifications related | |
1295 | * to a disabled CRTC. This avoids the need to manually ignore plane updates in | |
1296 | * driver code when the driver and/or hardware can't or just don't need to deal | |
1297 | * with updates on disabled CRTCs, for example when supporting runtime PM. | |
1298 | * | |
1299 | * The drm_atomic_helper_commit() default implementation only sets @active_only | |
1300 | * to false to most closely match the behaviour of the legacy helpers. This should | |
1301 | * not be copied blindly by drivers. | |
c2fcd274 DV |
1302 | */ |
1303 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
aef9dbb8 DV |
1304 | struct drm_atomic_state *old_state, |
1305 | bool active_only) | |
c2fcd274 | 1306 | { |
df63b999 ACO |
1307 | struct drm_crtc *crtc; |
1308 | struct drm_crtc_state *old_crtc_state; | |
1309 | struct drm_plane *plane; | |
1310 | struct drm_plane_state *old_plane_state; | |
c2fcd274 DV |
1311 | int i; |
1312 | ||
df63b999 | 1313 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1314 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1315 | |
1316 | funcs = crtc->helper_private; | |
1317 | ||
1318 | if (!funcs || !funcs->atomic_begin) | |
1319 | continue; | |
1320 | ||
aef9dbb8 DV |
1321 | if (active_only && !crtc->state->active) |
1322 | continue; | |
1323 | ||
613d2b27 | 1324 | funcs->atomic_begin(crtc, old_crtc_state); |
c2fcd274 DV |
1325 | } |
1326 | ||
df63b999 | 1327 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
b5ceff20 | 1328 | const struct drm_plane_helper_funcs *funcs; |
216c59d6 | 1329 | bool disabling; |
c2fcd274 DV |
1330 | |
1331 | funcs = plane->helper_private; | |
1332 | ||
3cad4b68 | 1333 | if (!funcs) |
c2fcd274 DV |
1334 | continue; |
1335 | ||
216c59d6 LP |
1336 | disabling = drm_atomic_plane_disabling(plane, old_plane_state); |
1337 | ||
1338 | if (active_only) { | |
1339 | /* | |
1340 | * Skip planes related to inactive CRTCs. If the plane | |
1341 | * is enabled use the state of the current CRTC. If the | |
1342 | * plane is being disabled use the state of the old | |
1343 | * CRTC to avoid skipping planes being disabled on an | |
1344 | * active CRTC. | |
1345 | */ | |
1346 | if (!disabling && !plane_crtc_active(plane->state)) | |
1347 | continue; | |
1348 | if (disabling && !plane_crtc_active(old_plane_state)) | |
1349 | continue; | |
1350 | } | |
aef9dbb8 | 1351 | |
407b8bd9 TR |
1352 | /* |
1353 | * Special-case disabling the plane if drivers support it. | |
1354 | */ | |
216c59d6 | 1355 | if (disabling && funcs->atomic_disable) |
407b8bd9 | 1356 | funcs->atomic_disable(plane, old_plane_state); |
216c59d6 | 1357 | else if (plane->state->crtc || disabling) |
407b8bd9 | 1358 | funcs->atomic_update(plane, old_plane_state); |
c2fcd274 DV |
1359 | } |
1360 | ||
df63b999 | 1361 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1362 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1363 | |
1364 | funcs = crtc->helper_private; | |
1365 | ||
1366 | if (!funcs || !funcs->atomic_flush) | |
1367 | continue; | |
1368 | ||
aef9dbb8 DV |
1369 | if (active_only && !crtc->state->active) |
1370 | continue; | |
1371 | ||
613d2b27 | 1372 | funcs->atomic_flush(crtc, old_crtc_state); |
c2fcd274 DV |
1373 | } |
1374 | } | |
1375 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1376 | ||
de28d021 ML |
1377 | /** |
1378 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc | |
1379 | * @old_crtc_state: atomic state object with the old crtc state | |
1380 | * | |
1381 | * This function commits the new plane state using the plane and atomic helper | |
1382 | * functions for planes on the specific crtc. It assumes that the atomic state | |
1383 | * has already been pushed into the relevant object state pointers, since this | |
1384 | * step can no longer fail. | |
1385 | * | |
1386 | * This function is useful when plane updates should be done crtc-by-crtc | |
1387 | * instead of one global step like drm_atomic_helper_commit_planes() does. | |
1388 | * | |
1389 | * This function can only be savely used when planes are not allowed to move | |
1390 | * between different CRTCs because this function doesn't handle inter-CRTC | |
1391 | * depencies. Callers need to ensure that either no such depencies exist, | |
1392 | * resolve them through ordering of commit calls or through some other means. | |
1393 | */ | |
1394 | void | |
1395 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) | |
1396 | { | |
1397 | const struct drm_crtc_helper_funcs *crtc_funcs; | |
1398 | struct drm_crtc *crtc = old_crtc_state->crtc; | |
1399 | struct drm_atomic_state *old_state = old_crtc_state->state; | |
1400 | struct drm_plane *plane; | |
1401 | unsigned plane_mask; | |
1402 | ||
1403 | plane_mask = old_crtc_state->plane_mask; | |
1404 | plane_mask |= crtc->state->plane_mask; | |
1405 | ||
1406 | crtc_funcs = crtc->helper_private; | |
1407 | if (crtc_funcs && crtc_funcs->atomic_begin) | |
613d2b27 | 1408 | crtc_funcs->atomic_begin(crtc, old_crtc_state); |
de28d021 ML |
1409 | |
1410 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { | |
1411 | struct drm_plane_state *old_plane_state = | |
1412 | drm_atomic_get_existing_plane_state(old_state, plane); | |
1413 | const struct drm_plane_helper_funcs *plane_funcs; | |
1414 | ||
1415 | plane_funcs = plane->helper_private; | |
1416 | ||
1417 | if (!old_plane_state || !plane_funcs) | |
1418 | continue; | |
1419 | ||
1420 | WARN_ON(plane->state->crtc && plane->state->crtc != crtc); | |
1421 | ||
1422 | if (drm_atomic_plane_disabling(plane, old_plane_state) && | |
1423 | plane_funcs->atomic_disable) | |
1424 | plane_funcs->atomic_disable(plane, old_plane_state); | |
1425 | else if (plane->state->crtc || | |
1426 | drm_atomic_plane_disabling(plane, old_plane_state)) | |
1427 | plane_funcs->atomic_update(plane, old_plane_state); | |
1428 | } | |
1429 | ||
1430 | if (crtc_funcs && crtc_funcs->atomic_flush) | |
613d2b27 | 1431 | crtc_funcs->atomic_flush(crtc, old_crtc_state); |
de28d021 ML |
1432 | } |
1433 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); | |
1434 | ||
6753ba97 JS |
1435 | /** |
1436 | * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes | |
1437 | * @crtc: CRTC | |
1438 | * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks | |
1439 | * | |
1440 | * Disables all planes associated with the given CRTC. This can be | |
1441 | * used for instance in the CRTC helper disable callback to disable | |
1442 | * all planes before shutting down the display pipeline. | |
1443 | * | |
1444 | * If the atomic-parameter is set the function calls the CRTC's | |
1445 | * atomic_begin hook before and atomic_flush hook after disabling the | |
1446 | * planes. | |
1447 | * | |
1448 | * It is a bug to call this function without having implemented the | |
1449 | * ->atomic_disable() plane hook. | |
1450 | */ | |
1451 | void drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc *crtc, | |
1452 | bool atomic) | |
1453 | { | |
1454 | const struct drm_crtc_helper_funcs *crtc_funcs = | |
1455 | crtc->helper_private; | |
1456 | struct drm_plane *plane; | |
1457 | ||
1458 | if (atomic && crtc_funcs && crtc_funcs->atomic_begin) | |
1459 | crtc_funcs->atomic_begin(crtc, NULL); | |
1460 | ||
1461 | drm_for_each_plane(plane, crtc->dev) { | |
1462 | const struct drm_plane_helper_funcs *plane_funcs = | |
1463 | plane->helper_private; | |
1464 | ||
1465 | if (plane->state->crtc != crtc || !plane_funcs) | |
1466 | continue; | |
1467 | ||
1468 | WARN_ON(!plane_funcs->atomic_disable); | |
1469 | if (plane_funcs->atomic_disable) | |
1470 | plane_funcs->atomic_disable(plane, NULL); | |
1471 | } | |
1472 | ||
1473 | if (atomic && crtc_funcs && crtc_funcs->atomic_flush) | |
1474 | crtc_funcs->atomic_flush(crtc, NULL); | |
1475 | } | |
1476 | EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); | |
1477 | ||
c2fcd274 DV |
1478 | /** |
1479 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1480 | * @dev: DRM device | |
1481 | * @old_state: atomic state object with old state structures | |
1482 | * | |
1483 | * This function cleans up plane state, specifically framebuffers, from the old | |
1484 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1485 | * be able to call this function. | |
1486 | * | |
1487 | * This function must also be called on the new state when the atomic update | |
1488 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1489 | */ | |
1490 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1491 | struct drm_atomic_state *old_state) | |
1492 | { | |
df63b999 ACO |
1493 | struct drm_plane *plane; |
1494 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
1495 | int i; |
1496 | ||
df63b999 | 1497 | for_each_plane_in_state(old_state, plane, plane_state, i) { |
b5ceff20 | 1498 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1499 | |
c2fcd274 DV |
1500 | funcs = plane->helper_private; |
1501 | ||
844f9111 ML |
1502 | if (funcs->cleanup_fb) |
1503 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1504 | } |
1505 | } | |
1506 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1507 | ||
1508 | /** | |
1509 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
1510 | * @dev: DRM device | |
1511 | * @state: atomic state | |
1512 | * | |
1513 | * This function stores the atomic state into the current state pointers in all | |
1514 | * driver objects. It should be called after all failing steps have been done | |
1515 | * and succeeded, but before the actual hardware state is committed. | |
1516 | * | |
1517 | * For cleanup and error recovery the current state for all changed objects will | |
1518 | * be swaped into @state. | |
1519 | * | |
1520 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1521 | * | |
1522 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1523 | * | |
1524 | * 2. Do any other steps that might fail. | |
1525 | * | |
1526 | * 3. Put the staged state into the current state pointers with this function. | |
1527 | * | |
1528 | * 4. Actually commit the hardware state. | |
1529 | * | |
26196f7e | 1530 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
c2fcd274 DV |
1531 | * contains the old state. Also do any other cleanup required with that state. |
1532 | */ | |
1533 | void drm_atomic_helper_swap_state(struct drm_device *dev, | |
1534 | struct drm_atomic_state *state) | |
1535 | { | |
1536 | int i; | |
1537 | ||
5fff80bb | 1538 | for (i = 0; i < state->num_connector; i++) { |
c2fcd274 DV |
1539 | struct drm_connector *connector = state->connectors[i]; |
1540 | ||
1541 | if (!connector) | |
1542 | continue; | |
1543 | ||
1544 | connector->state->state = state; | |
1545 | swap(state->connector_states[i], connector->state); | |
1546 | connector->state->state = NULL; | |
1547 | } | |
1548 | ||
1549 | for (i = 0; i < dev->mode_config.num_crtc; i++) { | |
1550 | struct drm_crtc *crtc = state->crtcs[i]; | |
1551 | ||
1552 | if (!crtc) | |
1553 | continue; | |
1554 | ||
1555 | crtc->state->state = state; | |
1556 | swap(state->crtc_states[i], crtc->state); | |
1557 | crtc->state->state = NULL; | |
1558 | } | |
1559 | ||
1560 | for (i = 0; i < dev->mode_config.num_total_plane; i++) { | |
1561 | struct drm_plane *plane = state->planes[i]; | |
1562 | ||
1563 | if (!plane) | |
1564 | continue; | |
1565 | ||
1566 | plane->state->state = state; | |
1567 | swap(state->plane_states[i], plane->state); | |
1568 | plane->state->state = NULL; | |
1569 | } | |
1570 | } | |
1571 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
1572 | |
1573 | /** | |
1574 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
1575 | * @plane: plane object to update | |
1576 | * @crtc: owning CRTC of owning plane | |
1577 | * @fb: framebuffer to flip onto plane | |
1578 | * @crtc_x: x offset of primary plane on crtc | |
1579 | * @crtc_y: y offset of primary plane on crtc | |
1580 | * @crtc_w: width of primary plane rectangle on crtc | |
1581 | * @crtc_h: height of primary plane rectangle on crtc | |
1582 | * @src_x: x offset of @fb for panning | |
1583 | * @src_y: y offset of @fb for panning | |
1584 | * @src_w: width of source rectangle in @fb | |
1585 | * @src_h: height of source rectangle in @fb | |
1586 | * | |
1587 | * Provides a default plane update handler using the atomic driver interface. | |
1588 | * | |
1589 | * RETURNS: | |
1590 | * Zero on success, error code on failure | |
1591 | */ | |
1592 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
1593 | struct drm_crtc *crtc, | |
1594 | struct drm_framebuffer *fb, | |
1595 | int crtc_x, int crtc_y, | |
1596 | unsigned int crtc_w, unsigned int crtc_h, | |
1597 | uint32_t src_x, uint32_t src_y, | |
1598 | uint32_t src_w, uint32_t src_h) | |
1599 | { | |
1600 | struct drm_atomic_state *state; | |
1601 | struct drm_plane_state *plane_state; | |
1602 | int ret = 0; | |
1603 | ||
1604 | state = drm_atomic_state_alloc(plane->dev); | |
1605 | if (!state) | |
1606 | return -ENOMEM; | |
1607 | ||
1608 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1609 | retry: | |
1610 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1611 | if (IS_ERR(plane_state)) { | |
1612 | ret = PTR_ERR(plane_state); | |
1613 | goto fail; | |
1614 | } | |
1615 | ||
07cc0ef6 | 1616 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
1617 | if (ret != 0) |
1618 | goto fail; | |
321ebf04 | 1619 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
1620 | plane_state->crtc_x = crtc_x; |
1621 | plane_state->crtc_y = crtc_y; | |
042652ed | 1622 | plane_state->crtc_w = crtc_w; |
02e6f379 | 1623 | plane_state->crtc_h = crtc_h; |
042652ed DV |
1624 | plane_state->src_x = src_x; |
1625 | plane_state->src_y = src_y; | |
042652ed | 1626 | plane_state->src_w = src_w; |
02e6f379 | 1627 | plane_state->src_h = src_h; |
042652ed | 1628 | |
3671c580 DV |
1629 | if (plane == crtc->cursor) |
1630 | state->legacy_cursor_update = true; | |
1631 | ||
042652ed DV |
1632 | ret = drm_atomic_commit(state); |
1633 | if (ret != 0) | |
1634 | goto fail; | |
1635 | ||
1636 | /* Driver takes ownership of state on successful commit. */ | |
1637 | return 0; | |
1638 | fail: | |
1639 | if (ret == -EDEADLK) | |
1640 | goto backoff; | |
1641 | ||
1642 | drm_atomic_state_free(state); | |
1643 | ||
1644 | return ret; | |
1645 | backoff: | |
042652ed | 1646 | drm_atomic_state_clear(state); |
6f75cea6 | 1647 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1648 | |
1649 | /* | |
1650 | * Someone might have exchanged the framebuffer while we dropped locks | |
1651 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1652 | * core does for us. | |
1653 | */ | |
1654 | plane->old_fb = plane->fb; | |
1655 | ||
1656 | goto retry; | |
1657 | } | |
1658 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
1659 | ||
1660 | /** | |
1661 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
1662 | * @plane: plane to disable | |
1663 | * | |
1664 | * Provides a default plane disable handler using the atomic driver interface. | |
1665 | * | |
1666 | * RETURNS: | |
1667 | * Zero on success, error code on failure | |
1668 | */ | |
1669 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
1670 | { | |
1671 | struct drm_atomic_state *state; | |
1672 | struct drm_plane_state *plane_state; | |
1673 | int ret = 0; | |
1674 | ||
aa54e2ee JSP |
1675 | /* |
1676 | * FIXME: Without plane->crtc set we can't get at the implicit legacy | |
1677 | * acquire context. The real fix will be to wire the acquire ctx through | |
1678 | * everywhere we need it, but meanwhile prevent chaos by just skipping | |
1679 | * this noop. The critical case is the cursor ioctls which a) only grab | |
1680 | * crtc/cursor-plane locks (so we need the crtc to get at the right | |
1681 | * acquire context) and b) can try to disable the plane multiple times. | |
1682 | */ | |
1683 | if (!plane->crtc) | |
1684 | return 0; | |
1685 | ||
042652ed DV |
1686 | state = drm_atomic_state_alloc(plane->dev); |
1687 | if (!state) | |
1688 | return -ENOMEM; | |
1689 | ||
1690 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
1691 | retry: | |
1692 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1693 | if (IS_ERR(plane_state)) { | |
1694 | ret = PTR_ERR(plane_state); | |
1695 | goto fail; | |
1696 | } | |
1697 | ||
24e79d0d ML |
1698 | if (plane_state->crtc && (plane == plane->crtc->cursor)) |
1699 | plane_state->state->legacy_cursor_update = true; | |
1700 | ||
bbb1e524 | 1701 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
042652ed DV |
1702 | if (ret != 0) |
1703 | goto fail; | |
f02ad907 | 1704 | |
042652ed DV |
1705 | ret = drm_atomic_commit(state); |
1706 | if (ret != 0) | |
1707 | goto fail; | |
1708 | ||
1709 | /* Driver takes ownership of state on successful commit. */ | |
1710 | return 0; | |
1711 | fail: | |
1712 | if (ret == -EDEADLK) | |
1713 | goto backoff; | |
1714 | ||
1715 | drm_atomic_state_free(state); | |
1716 | ||
1717 | return ret; | |
1718 | backoff: | |
042652ed | 1719 | drm_atomic_state_clear(state); |
6f75cea6 | 1720 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1721 | |
1722 | /* | |
1723 | * Someone might have exchanged the framebuffer while we dropped locks | |
1724 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1725 | * core does for us. | |
1726 | */ | |
1727 | plane->old_fb = plane->fb; | |
1728 | ||
1729 | goto retry; | |
1730 | } | |
1731 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
1732 | ||
bbb1e524 RC |
1733 | /* just used from fb-helper and atomic-helper: */ |
1734 | int __drm_atomic_helper_disable_plane(struct drm_plane *plane, | |
1735 | struct drm_plane_state *plane_state) | |
1736 | { | |
1737 | int ret; | |
1738 | ||
1739 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
1740 | if (ret != 0) | |
1741 | return ret; | |
1742 | ||
1743 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
1744 | plane_state->crtc_x = 0; | |
1745 | plane_state->crtc_y = 0; | |
bbb1e524 | 1746 | plane_state->crtc_w = 0; |
02e6f379 | 1747 | plane_state->crtc_h = 0; |
bbb1e524 RC |
1748 | plane_state->src_x = 0; |
1749 | plane_state->src_y = 0; | |
bbb1e524 | 1750 | plane_state->src_w = 0; |
02e6f379 | 1751 | plane_state->src_h = 0; |
bbb1e524 | 1752 | |
bbb1e524 RC |
1753 | return 0; |
1754 | } | |
1755 | ||
042652ed DV |
1756 | static int update_output_state(struct drm_atomic_state *state, |
1757 | struct drm_mode_set *set) | |
1758 | { | |
1759 | struct drm_device *dev = set->crtc->dev; | |
df63b999 ACO |
1760 | struct drm_crtc *crtc; |
1761 | struct drm_crtc_state *crtc_state; | |
1762 | struct drm_connector *connector; | |
042652ed | 1763 | struct drm_connector_state *conn_state; |
042652ed DV |
1764 | int ret, i, j; |
1765 | ||
1766 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
1767 | state->acquire_ctx); | |
1768 | if (ret) | |
1769 | return ret; | |
1770 | ||
1771 | /* First grab all affected connector/crtc states. */ | |
1772 | for (i = 0; i < set->num_connectors; i++) { | |
1773 | conn_state = drm_atomic_get_connector_state(state, | |
1774 | set->connectors[i]); | |
1775 | if (IS_ERR(conn_state)) | |
1776 | return PTR_ERR(conn_state); | |
1777 | } | |
1778 | ||
df63b999 | 1779 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
1780 | ret = drm_atomic_add_affected_connectors(state, crtc); |
1781 | if (ret) | |
1782 | return ret; | |
1783 | } | |
1784 | ||
1785 | /* Then recompute connector->crtc links and crtc enabling state. */ | |
df63b999 | 1786 | for_each_connector_in_state(state, connector, conn_state, i) { |
042652ed DV |
1787 | if (conn_state->crtc == set->crtc) { |
1788 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1789 | NULL); | |
1790 | if (ret) | |
1791 | return ret; | |
1792 | } | |
1793 | ||
1794 | for (j = 0; j < set->num_connectors; j++) { | |
1795 | if (set->connectors[j] == connector) { | |
1796 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1797 | set->crtc); | |
1798 | if (ret) | |
1799 | return ret; | |
1800 | break; | |
1801 | } | |
1802 | } | |
1803 | } | |
1804 | ||
df63b999 | 1805 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
1806 | /* Don't update ->enable for the CRTC in the set_config request, |
1807 | * since a mismatch would indicate a bug in the upper layers. | |
1808 | * The actual modeset code later on will catch any | |
1809 | * inconsistencies here. */ | |
1810 | if (crtc == set->crtc) | |
1811 | continue; | |
1812 | ||
14de6c44 | 1813 | if (!crtc_state->connector_mask) { |
c30f55a7 LP |
1814 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, |
1815 | NULL); | |
1816 | if (ret < 0) | |
1817 | return ret; | |
1818 | ||
9b5edbf7 | 1819 | crtc_state->active = false; |
c30f55a7 | 1820 | } |
042652ed DV |
1821 | } |
1822 | ||
1823 | return 0; | |
1824 | } | |
1825 | ||
1826 | /** | |
1827 | * drm_atomic_helper_set_config - set a new config from userspace | |
1828 | * @set: mode set configuration | |
1829 | * | |
1830 | * Provides a default crtc set_config handler using the atomic driver interface. | |
1831 | * | |
1832 | * Returns: | |
1833 | * Returns 0 on success, negative errno numbers on failure. | |
1834 | */ | |
1835 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
1836 | { | |
1837 | struct drm_atomic_state *state; | |
1838 | struct drm_crtc *crtc = set->crtc; | |
042652ed DV |
1839 | int ret = 0; |
1840 | ||
1841 | state = drm_atomic_state_alloc(crtc->dev); | |
1842 | if (!state) | |
1843 | return -ENOMEM; | |
1844 | ||
1845 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1846 | retry: | |
bbb1e524 RC |
1847 | ret = __drm_atomic_helper_set_config(set, state); |
1848 | if (ret != 0) | |
042652ed | 1849 | goto fail; |
042652ed | 1850 | |
bbb1e524 RC |
1851 | ret = drm_atomic_commit(state); |
1852 | if (ret != 0) | |
e5b5341c | 1853 | goto fail; |
bbb1e524 RC |
1854 | |
1855 | /* Driver takes ownership of state on successful commit. */ | |
1856 | return 0; | |
1857 | fail: | |
1858 | if (ret == -EDEADLK) | |
1859 | goto backoff; | |
1860 | ||
1861 | drm_atomic_state_free(state); | |
1862 | ||
1863 | return ret; | |
1864 | backoff: | |
1865 | drm_atomic_state_clear(state); | |
1866 | drm_atomic_legacy_backoff(state); | |
1867 | ||
1868 | /* | |
1869 | * Someone might have exchanged the framebuffer while we dropped locks | |
1870 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1871 | * core does for us. | |
1872 | */ | |
1873 | crtc->primary->old_fb = crtc->primary->fb; | |
1874 | ||
1875 | goto retry; | |
1876 | } | |
1877 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
1878 | ||
1879 | /* just used from fb-helper and atomic-helper: */ | |
1880 | int __drm_atomic_helper_set_config(struct drm_mode_set *set, | |
1881 | struct drm_atomic_state *state) | |
1882 | { | |
1883 | struct drm_crtc_state *crtc_state; | |
1884 | struct drm_plane_state *primary_state; | |
1885 | struct drm_crtc *crtc = set->crtc; | |
83926117 | 1886 | int hdisplay, vdisplay; |
bbb1e524 RC |
1887 | int ret; |
1888 | ||
1889 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1890 | if (IS_ERR(crtc_state)) | |
1891 | return PTR_ERR(crtc_state); | |
1892 | ||
1893 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); | |
1894 | if (IS_ERR(primary_state)) | |
1895 | return PTR_ERR(primary_state); | |
e5b5341c | 1896 | |
042652ed DV |
1897 | if (!set->mode) { |
1898 | WARN_ON(set->fb); | |
1899 | WARN_ON(set->num_connectors); | |
1900 | ||
819364da DS |
1901 | ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); |
1902 | if (ret != 0) | |
bbb1e524 | 1903 | return ret; |
819364da | 1904 | |
eab3bbef | 1905 | crtc_state->active = false; |
e5b5341c | 1906 | |
07cc0ef6 | 1907 | ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
e5b5341c | 1908 | if (ret != 0) |
bbb1e524 | 1909 | return ret; |
e5b5341c RC |
1910 | |
1911 | drm_atomic_set_fb_for_plane(primary_state, NULL); | |
1912 | ||
042652ed DV |
1913 | goto commit; |
1914 | } | |
1915 | ||
1916 | WARN_ON(!set->fb); | |
1917 | WARN_ON(!set->num_connectors); | |
1918 | ||
819364da DS |
1919 | ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); |
1920 | if (ret != 0) | |
bbb1e524 | 1921 | return ret; |
819364da | 1922 | |
eab3bbef | 1923 | crtc_state->active = true; |
042652ed | 1924 | |
07cc0ef6 | 1925 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
042652ed | 1926 | if (ret != 0) |
bbb1e524 RC |
1927 | return ret; |
1928 | ||
83926117 VS |
1929 | drm_crtc_get_hv_timing(set->mode, &hdisplay, &vdisplay); |
1930 | ||
321ebf04 | 1931 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
042652ed DV |
1932 | primary_state->crtc_x = 0; |
1933 | primary_state->crtc_y = 0; | |
83926117 | 1934 | primary_state->crtc_w = hdisplay; |
02e6f379 | 1935 | primary_state->crtc_h = vdisplay; |
042652ed DV |
1936 | primary_state->src_x = set->x << 16; |
1937 | primary_state->src_y = set->y << 16; | |
41121248 | 1938 | if (primary_state->rotation & (BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270))) { |
83926117 | 1939 | primary_state->src_w = vdisplay << 16; |
02e6f379 | 1940 | primary_state->src_h = hdisplay << 16; |
41121248 | 1941 | } else { |
83926117 | 1942 | primary_state->src_w = hdisplay << 16; |
02e6f379 | 1943 | primary_state->src_h = vdisplay << 16; |
41121248 | 1944 | } |
042652ed DV |
1945 | |
1946 | commit: | |
1947 | ret = update_output_state(state, set); | |
1948 | if (ret) | |
bbb1e524 | 1949 | return ret; |
042652ed | 1950 | |
042652ed | 1951 | return 0; |
042652ed | 1952 | } |
042652ed | 1953 | |
14942760 TR |
1954 | /** |
1955 | * drm_atomic_helper_disable_all - disable all currently active outputs | |
1956 | * @dev: DRM device | |
1957 | * @ctx: lock acquisition context | |
1958 | * | |
1959 | * Loops through all connectors, finding those that aren't turned off and then | |
1960 | * turns them off by setting their DPMS mode to OFF and deactivating the CRTC | |
1961 | * that they are connected to. | |
1962 | * | |
1963 | * This is used for example in suspend/resume to disable all currently active | |
1964 | * functions when suspending. | |
1965 | * | |
1966 | * Note that if callers haven't already acquired all modeset locks this might | |
1967 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
1968 | * | |
1969 | * Returns: | |
1970 | * 0 on success or a negative error code on failure. | |
1971 | * | |
1972 | * See also: | |
1973 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
1974 | */ | |
1975 | int drm_atomic_helper_disable_all(struct drm_device *dev, | |
1976 | struct drm_modeset_acquire_ctx *ctx) | |
1977 | { | |
1978 | struct drm_atomic_state *state; | |
1979 | struct drm_connector *conn; | |
1980 | int err; | |
1981 | ||
1982 | state = drm_atomic_state_alloc(dev); | |
1983 | if (!state) | |
1984 | return -ENOMEM; | |
1985 | ||
1986 | state->acquire_ctx = ctx; | |
1987 | ||
1988 | drm_for_each_connector(conn, dev) { | |
1989 | struct drm_crtc *crtc = conn->state->crtc; | |
1990 | struct drm_crtc_state *crtc_state; | |
1991 | ||
1992 | if (!crtc || conn->dpms != DRM_MODE_DPMS_ON) | |
1993 | continue; | |
1994 | ||
1995 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1996 | if (IS_ERR(crtc_state)) { | |
1997 | err = PTR_ERR(crtc_state); | |
1998 | goto free; | |
1999 | } | |
2000 | ||
2001 | crtc_state->active = false; | |
2002 | } | |
2003 | ||
2004 | err = drm_atomic_commit(state); | |
2005 | ||
2006 | free: | |
2007 | if (err < 0) | |
2008 | drm_atomic_state_free(state); | |
2009 | ||
2010 | return err; | |
2011 | } | |
2012 | EXPORT_SYMBOL(drm_atomic_helper_disable_all); | |
2013 | ||
2014 | /** | |
2015 | * drm_atomic_helper_suspend - subsystem-level suspend helper | |
2016 | * @dev: DRM device | |
2017 | * | |
2018 | * Duplicates the current atomic state, disables all active outputs and then | |
2019 | * returns a pointer to the original atomic state to the caller. Drivers can | |
2020 | * pass this pointer to the drm_atomic_helper_resume() helper upon resume to | |
2021 | * restore the output configuration that was active at the time the system | |
2022 | * entered suspend. | |
2023 | * | |
2024 | * Note that it is potentially unsafe to use this. The atomic state object | |
2025 | * returned by this function is assumed to be persistent. Drivers must ensure | |
2026 | * that this holds true. Before calling this function, drivers must make sure | |
2027 | * to suspend fbdev emulation so that nothing can be using the device. | |
2028 | * | |
2029 | * Returns: | |
2030 | * A pointer to a copy of the state before suspend on success or an ERR_PTR()- | |
2031 | * encoded error code on failure. Drivers should store the returned atomic | |
2032 | * state object and pass it to the drm_atomic_helper_resume() helper upon | |
2033 | * resume. | |
2034 | * | |
2035 | * See also: | |
2036 | * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), | |
2037 | * drm_atomic_helper_resume() | |
2038 | */ | |
2039 | struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) | |
2040 | { | |
2041 | struct drm_modeset_acquire_ctx ctx; | |
2042 | struct drm_atomic_state *state; | |
2043 | int err; | |
2044 | ||
2045 | drm_modeset_acquire_init(&ctx, 0); | |
2046 | ||
2047 | retry: | |
2048 | err = drm_modeset_lock_all_ctx(dev, &ctx); | |
2049 | if (err < 0) { | |
2050 | state = ERR_PTR(err); | |
2051 | goto unlock; | |
2052 | } | |
2053 | ||
2054 | state = drm_atomic_helper_duplicate_state(dev, &ctx); | |
2055 | if (IS_ERR(state)) | |
2056 | goto unlock; | |
2057 | ||
2058 | err = drm_atomic_helper_disable_all(dev, &ctx); | |
2059 | if (err < 0) { | |
2060 | drm_atomic_state_free(state); | |
2061 | state = ERR_PTR(err); | |
2062 | goto unlock; | |
2063 | } | |
2064 | ||
2065 | unlock: | |
2066 | if (PTR_ERR(state) == -EDEADLK) { | |
2067 | drm_modeset_backoff(&ctx); | |
2068 | goto retry; | |
2069 | } | |
2070 | ||
2071 | drm_modeset_drop_locks(&ctx); | |
2072 | drm_modeset_acquire_fini(&ctx); | |
2073 | return state; | |
2074 | } | |
2075 | EXPORT_SYMBOL(drm_atomic_helper_suspend); | |
2076 | ||
2077 | /** | |
2078 | * drm_atomic_helper_resume - subsystem-level resume helper | |
2079 | * @dev: DRM device | |
2080 | * @state: atomic state to resume to | |
2081 | * | |
2082 | * Calls drm_mode_config_reset() to synchronize hardware and software states, | |
2083 | * grabs all modeset locks and commits the atomic state object. This can be | |
2084 | * used in conjunction with the drm_atomic_helper_suspend() helper to | |
2085 | * implement suspend/resume for drivers that support atomic mode-setting. | |
2086 | * | |
2087 | * Returns: | |
2088 | * 0 on success or a negative error code on failure. | |
2089 | * | |
2090 | * See also: | |
2091 | * drm_atomic_helper_suspend() | |
2092 | */ | |
2093 | int drm_atomic_helper_resume(struct drm_device *dev, | |
2094 | struct drm_atomic_state *state) | |
2095 | { | |
2096 | struct drm_mode_config *config = &dev->mode_config; | |
2097 | int err; | |
2098 | ||
2099 | drm_mode_config_reset(dev); | |
2100 | drm_modeset_lock_all(dev); | |
2101 | state->acquire_ctx = config->acquire_ctx; | |
2102 | err = drm_atomic_commit(state); | |
2103 | drm_modeset_unlock_all(dev); | |
2104 | ||
2105 | return err; | |
2106 | } | |
2107 | EXPORT_SYMBOL(drm_atomic_helper_resume); | |
2108 | ||
042652ed | 2109 | /** |
7f50002f | 2110 | * drm_atomic_helper_crtc_set_property - helper for crtc properties |
042652ed DV |
2111 | * @crtc: DRM crtc |
2112 | * @property: DRM property | |
2113 | * @val: value of property | |
2114 | * | |
7f50002f LP |
2115 | * Provides a default crtc set_property handler using the atomic driver |
2116 | * interface. | |
042652ed DV |
2117 | * |
2118 | * RETURNS: | |
2119 | * Zero on success, error code on failure | |
2120 | */ | |
2121 | int | |
2122 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
2123 | struct drm_property *property, | |
2124 | uint64_t val) | |
2125 | { | |
2126 | struct drm_atomic_state *state; | |
2127 | struct drm_crtc_state *crtc_state; | |
2128 | int ret = 0; | |
2129 | ||
2130 | state = drm_atomic_state_alloc(crtc->dev); | |
2131 | if (!state) | |
2132 | return -ENOMEM; | |
2133 | ||
2134 | /* ->set_property is always called with all locks held. */ | |
2135 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
2136 | retry: | |
2137 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2138 | if (IS_ERR(crtc_state)) { | |
2139 | ret = PTR_ERR(crtc_state); | |
2140 | goto fail; | |
2141 | } | |
2142 | ||
40ecc694 RC |
2143 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
2144 | property, val); | |
042652ed DV |
2145 | if (ret) |
2146 | goto fail; | |
2147 | ||
2148 | ret = drm_atomic_commit(state); | |
2149 | if (ret != 0) | |
2150 | goto fail; | |
2151 | ||
2152 | /* Driver takes ownership of state on successful commit. */ | |
2153 | return 0; | |
2154 | fail: | |
2155 | if (ret == -EDEADLK) | |
2156 | goto backoff; | |
2157 | ||
2158 | drm_atomic_state_free(state); | |
2159 | ||
2160 | return ret; | |
2161 | backoff: | |
042652ed | 2162 | drm_atomic_state_clear(state); |
6f75cea6 | 2163 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2164 | |
2165 | goto retry; | |
2166 | } | |
2167 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
2168 | ||
2169 | /** | |
7f50002f | 2170 | * drm_atomic_helper_plane_set_property - helper for plane properties |
042652ed DV |
2171 | * @plane: DRM plane |
2172 | * @property: DRM property | |
2173 | * @val: value of property | |
2174 | * | |
7f50002f LP |
2175 | * Provides a default plane set_property handler using the atomic driver |
2176 | * interface. | |
042652ed DV |
2177 | * |
2178 | * RETURNS: | |
2179 | * Zero on success, error code on failure | |
2180 | */ | |
2181 | int | |
2182 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
2183 | struct drm_property *property, | |
2184 | uint64_t val) | |
2185 | { | |
2186 | struct drm_atomic_state *state; | |
2187 | struct drm_plane_state *plane_state; | |
2188 | int ret = 0; | |
2189 | ||
2190 | state = drm_atomic_state_alloc(plane->dev); | |
2191 | if (!state) | |
2192 | return -ENOMEM; | |
2193 | ||
2194 | /* ->set_property is always called with all locks held. */ | |
2195 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
2196 | retry: | |
2197 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2198 | if (IS_ERR(plane_state)) { | |
2199 | ret = PTR_ERR(plane_state); | |
2200 | goto fail; | |
2201 | } | |
2202 | ||
40ecc694 RC |
2203 | ret = drm_atomic_plane_set_property(plane, plane_state, |
2204 | property, val); | |
042652ed DV |
2205 | if (ret) |
2206 | goto fail; | |
2207 | ||
2208 | ret = drm_atomic_commit(state); | |
2209 | if (ret != 0) | |
2210 | goto fail; | |
2211 | ||
2212 | /* Driver takes ownership of state on successful commit. */ | |
2213 | return 0; | |
2214 | fail: | |
2215 | if (ret == -EDEADLK) | |
2216 | goto backoff; | |
2217 | ||
2218 | drm_atomic_state_free(state); | |
2219 | ||
2220 | return ret; | |
2221 | backoff: | |
042652ed | 2222 | drm_atomic_state_clear(state); |
6f75cea6 | 2223 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2224 | |
2225 | goto retry; | |
2226 | } | |
2227 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
2228 | ||
2229 | /** | |
7f50002f | 2230 | * drm_atomic_helper_connector_set_property - helper for connector properties |
042652ed DV |
2231 | * @connector: DRM connector |
2232 | * @property: DRM property | |
2233 | * @val: value of property | |
2234 | * | |
7f50002f LP |
2235 | * Provides a default connector set_property handler using the atomic driver |
2236 | * interface. | |
042652ed DV |
2237 | * |
2238 | * RETURNS: | |
2239 | * Zero on success, error code on failure | |
2240 | */ | |
2241 | int | |
2242 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
2243 | struct drm_property *property, | |
2244 | uint64_t val) | |
2245 | { | |
2246 | struct drm_atomic_state *state; | |
2247 | struct drm_connector_state *connector_state; | |
2248 | int ret = 0; | |
2249 | ||
2250 | state = drm_atomic_state_alloc(connector->dev); | |
2251 | if (!state) | |
2252 | return -ENOMEM; | |
2253 | ||
2254 | /* ->set_property is always called with all locks held. */ | |
2255 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
2256 | retry: | |
2257 | connector_state = drm_atomic_get_connector_state(state, connector); | |
2258 | if (IS_ERR(connector_state)) { | |
2259 | ret = PTR_ERR(connector_state); | |
2260 | goto fail; | |
2261 | } | |
2262 | ||
40ecc694 RC |
2263 | ret = drm_atomic_connector_set_property(connector, connector_state, |
2264 | property, val); | |
042652ed DV |
2265 | if (ret) |
2266 | goto fail; | |
2267 | ||
2268 | ret = drm_atomic_commit(state); | |
2269 | if (ret != 0) | |
2270 | goto fail; | |
2271 | ||
2272 | /* Driver takes ownership of state on successful commit. */ | |
2273 | return 0; | |
2274 | fail: | |
2275 | if (ret == -EDEADLK) | |
2276 | goto backoff; | |
2277 | ||
2278 | drm_atomic_state_free(state); | |
2279 | ||
2280 | return ret; | |
2281 | backoff: | |
042652ed | 2282 | drm_atomic_state_clear(state); |
6f75cea6 | 2283 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2284 | |
2285 | goto retry; | |
2286 | } | |
2287 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 DV |
2288 | |
2289 | /** | |
2290 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
2291 | * @crtc: DRM crtc | |
2292 | * @fb: DRM framebuffer | |
2293 | * @event: optional DRM event to signal upon completion | |
2294 | * @flags: flip flags for non-vblank sync'ed updates | |
2295 | * | |
2296 | * Provides a default page flip implementation using the atomic driver interface. | |
2297 | * | |
2298 | * Note that for now so called async page flips (i.e. updates which are not | |
2299 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
2300 | * no provisions for this yet. | |
2301 | * | |
2302 | * Returns: | |
2303 | * Returns 0 on success, negative errno numbers on failure. | |
2304 | */ | |
2305 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
2306 | struct drm_framebuffer *fb, | |
2307 | struct drm_pending_vblank_event *event, | |
2308 | uint32_t flags) | |
2309 | { | |
2310 | struct drm_plane *plane = crtc->primary; | |
2311 | struct drm_atomic_state *state; | |
2312 | struct drm_plane_state *plane_state; | |
2313 | struct drm_crtc_state *crtc_state; | |
2314 | int ret = 0; | |
2315 | ||
2316 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
2317 | return -EINVAL; | |
2318 | ||
2319 | state = drm_atomic_state_alloc(plane->dev); | |
2320 | if (!state) | |
2321 | return -ENOMEM; | |
2322 | ||
2323 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2324 | retry: | |
2325 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2326 | if (IS_ERR(crtc_state)) { | |
2327 | ret = PTR_ERR(crtc_state); | |
2328 | goto fail; | |
2329 | } | |
2330 | crtc_state->event = event; | |
2331 | ||
2332 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2333 | if (IS_ERR(plane_state)) { | |
2334 | ret = PTR_ERR(plane_state); | |
2335 | goto fail; | |
2336 | } | |
2337 | ||
07cc0ef6 | 2338 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
8bc0f312 DV |
2339 | if (ret != 0) |
2340 | goto fail; | |
321ebf04 | 2341 | drm_atomic_set_fb_for_plane(plane_state, fb); |
8bc0f312 | 2342 | |
4cba6850 DV |
2343 | /* Make sure we don't accidentally do a full modeset. */ |
2344 | state->allow_modeset = false; | |
2345 | if (!crtc_state->active) { | |
2346 | DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n", | |
2347 | crtc->base.id); | |
2348 | ret = -EINVAL; | |
2349 | goto fail; | |
2350 | } | |
2351 | ||
8bc0f312 DV |
2352 | ret = drm_atomic_async_commit(state); |
2353 | if (ret != 0) | |
2354 | goto fail; | |
2355 | ||
8bc0f312 DV |
2356 | /* Driver takes ownership of state on successful async commit. */ |
2357 | return 0; | |
2358 | fail: | |
2359 | if (ret == -EDEADLK) | |
2360 | goto backoff; | |
2361 | ||
2362 | drm_atomic_state_free(state); | |
2363 | ||
2364 | return ret; | |
2365 | backoff: | |
8bc0f312 | 2366 | drm_atomic_state_clear(state); |
6f75cea6 | 2367 | drm_atomic_legacy_backoff(state); |
8bc0f312 DV |
2368 | |
2369 | /* | |
2370 | * Someone might have exchanged the framebuffer while we dropped locks | |
2371 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2372 | * core does for us. | |
2373 | */ | |
2374 | plane->old_fb = plane->fb; | |
2375 | ||
2376 | goto retry; | |
2377 | } | |
2378 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
d461701c | 2379 | |
b486e0e6 DV |
2380 | /** |
2381 | * drm_atomic_helper_connector_dpms() - connector dpms helper implementation | |
2382 | * @connector: affected connector | |
2383 | * @mode: DPMS mode | |
2384 | * | |
2385 | * This is the main helper function provided by the atomic helper framework for | |
2386 | * implementing the legacy DPMS connector interface. It computes the new desired | |
2387 | * ->active state for the corresponding CRTC (if the connector is enabled) and | |
2388 | * updates it. | |
9a69a9ac ML |
2389 | * |
2390 | * Returns: | |
2391 | * Returns 0 on success, negative errno numbers on failure. | |
b486e0e6 | 2392 | */ |
9a69a9ac ML |
2393 | int drm_atomic_helper_connector_dpms(struct drm_connector *connector, |
2394 | int mode) | |
b486e0e6 DV |
2395 | { |
2396 | struct drm_mode_config *config = &connector->dev->mode_config; | |
2397 | struct drm_atomic_state *state; | |
2398 | struct drm_crtc_state *crtc_state; | |
2399 | struct drm_crtc *crtc; | |
2400 | struct drm_connector *tmp_connector; | |
2401 | int ret; | |
2402 | bool active = false; | |
9a69a9ac | 2403 | int old_mode = connector->dpms; |
b486e0e6 DV |
2404 | |
2405 | if (mode != DRM_MODE_DPMS_ON) | |
2406 | mode = DRM_MODE_DPMS_OFF; | |
2407 | ||
2408 | connector->dpms = mode; | |
2409 | crtc = connector->state->crtc; | |
2410 | ||
2411 | if (!crtc) | |
9a69a9ac | 2412 | return 0; |
b486e0e6 | 2413 | |
b486e0e6 DV |
2414 | state = drm_atomic_state_alloc(connector->dev); |
2415 | if (!state) | |
9a69a9ac | 2416 | return -ENOMEM; |
b486e0e6 DV |
2417 | |
2418 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2419 | retry: | |
2420 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
9a69a9ac ML |
2421 | if (IS_ERR(crtc_state)) { |
2422 | ret = PTR_ERR(crtc_state); | |
2423 | goto fail; | |
2424 | } | |
b486e0e6 DV |
2425 | |
2426 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
2427 | ||
9a9f5ce8 | 2428 | drm_for_each_connector(tmp_connector, connector->dev) { |
0388df05 | 2429 | if (tmp_connector->state->crtc != crtc) |
b486e0e6 DV |
2430 | continue; |
2431 | ||
0388df05 | 2432 | if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { |
b486e0e6 DV |
2433 | active = true; |
2434 | break; | |
2435 | } | |
2436 | } | |
2437 | crtc_state->active = active; | |
2438 | ||
2439 | ret = drm_atomic_commit(state); | |
2440 | if (ret != 0) | |
2441 | goto fail; | |
2442 | ||
9a69a9ac ML |
2443 | /* Driver takes ownership of state on successful commit. */ |
2444 | return 0; | |
b486e0e6 DV |
2445 | fail: |
2446 | if (ret == -EDEADLK) | |
2447 | goto backoff; | |
2448 | ||
9a69a9ac | 2449 | connector->dpms = old_mode; |
b486e0e6 DV |
2450 | drm_atomic_state_free(state); |
2451 | ||
9a69a9ac | 2452 | return ret; |
b486e0e6 DV |
2453 | backoff: |
2454 | drm_atomic_state_clear(state); | |
2455 | drm_atomic_legacy_backoff(state); | |
2456 | ||
2457 | goto retry; | |
2458 | } | |
2459 | EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); | |
2460 | ||
3150c7d0 DV |
2461 | /** |
2462 | * DOC: atomic state reset and initialization | |
2463 | * | |
2464 | * Both the drm core and the atomic helpers assume that there is always the full | |
2465 | * and correct atomic software state for all connectors, CRTCs and planes | |
2466 | * available. Which is a bit a problem on driver load and also after system | |
2467 | * suspend. One way to solve this is to have a hardware state read-out | |
2468 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
2469 | * driver). | |
2470 | * | |
2471 | * The simpler solution is to just reset the software state to everything off, | |
2472 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
2473 | * the atomic helpers provide default reset implementations for all hooks. | |
7f8ee3e5 DV |
2474 | * |
2475 | * On the upside the precise state tracking of atomic simplifies system suspend | |
2476 | * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe | |
2477 | * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume(). | |
2478 | * For other drivers the building blocks are split out, see the documentation | |
2479 | * for these functions. | |
3150c7d0 DV |
2480 | */ |
2481 | ||
d461701c DV |
2482 | /** |
2483 | * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs | |
2484 | * @crtc: drm CRTC | |
2485 | * | |
2486 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
2487 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2488 | */ | |
2489 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
2490 | { | |
5f911905 | 2491 | if (crtc->state) |
99cf4a29 | 2492 | drm_property_unreference_blob(crtc->state->mode_blob); |
d461701c DV |
2493 | kfree(crtc->state); |
2494 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
07cc0ef6 DV |
2495 | |
2496 | if (crtc->state) | |
2497 | crtc->state->crtc = crtc; | |
d461701c DV |
2498 | } |
2499 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
2500 | ||
f5e7840b TR |
2501 | /** |
2502 | * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state | |
2503 | * @crtc: CRTC object | |
2504 | * @state: atomic CRTC state | |
2505 | * | |
2506 | * Copies atomic state from a CRTC's current state and resets inferred values. | |
2507 | * This is useful for drivers that subclass the CRTC state. | |
2508 | */ | |
2509 | void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc, | |
2510 | struct drm_crtc_state *state) | |
2511 | { | |
2512 | memcpy(state, crtc->state, sizeof(*state)); | |
2513 | ||
99cf4a29 DS |
2514 | if (state->mode_blob) |
2515 | drm_property_reference_blob(state->mode_blob); | |
f5e7840b TR |
2516 | state->mode_changed = false; |
2517 | state->active_changed = false; | |
2518 | state->planes_changed = false; | |
fc596660 | 2519 | state->connectors_changed = false; |
f5e7840b TR |
2520 | state->event = NULL; |
2521 | } | |
2522 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state); | |
2523 | ||
d461701c DV |
2524 | /** |
2525 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
2526 | * @crtc: drm CRTC | |
2527 | * | |
2528 | * Default CRTC state duplicate hook for drivers which don't have their own | |
2529 | * subclassed CRTC state structure. | |
2530 | */ | |
2531 | struct drm_crtc_state * | |
2532 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
2533 | { | |
2534 | struct drm_crtc_state *state; | |
2535 | ||
2536 | if (WARN_ON(!crtc->state)) | |
2537 | return NULL; | |
2538 | ||
f5e7840b TR |
2539 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2540 | if (state) | |
2541 | __drm_atomic_helper_crtc_duplicate_state(crtc, state); | |
d461701c DV |
2542 | |
2543 | return state; | |
2544 | } | |
2545 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
2546 | ||
f5e7840b TR |
2547 | /** |
2548 | * __drm_atomic_helper_crtc_destroy_state - release CRTC state | |
2549 | * @crtc: CRTC object | |
2550 | * @state: CRTC state object to release | |
2551 | * | |
2552 | * Releases all resources stored in the CRTC state without actually freeing | |
2553 | * the memory of the CRTC state. This is useful for drivers that subclass the | |
2554 | * CRTC state. | |
2555 | */ | |
2556 | void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
2557 | struct drm_crtc_state *state) | |
2558 | { | |
5f911905 | 2559 | drm_property_unreference_blob(state->mode_blob); |
f5e7840b TR |
2560 | } |
2561 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); | |
2562 | ||
d461701c DV |
2563 | /** |
2564 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
2565 | * @crtc: drm CRTC | |
2566 | * @state: CRTC state object to release | |
2567 | * | |
2568 | * Default CRTC state destroy hook for drivers which don't have their own | |
2569 | * subclassed CRTC state structure. | |
2570 | */ | |
2571 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
2572 | struct drm_crtc_state *state) | |
2573 | { | |
f5e7840b | 2574 | __drm_atomic_helper_crtc_destroy_state(crtc, state); |
d461701c DV |
2575 | kfree(state); |
2576 | } | |
2577 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
2578 | ||
2579 | /** | |
2580 | * drm_atomic_helper_plane_reset - default ->reset hook for planes | |
2581 | * @plane: drm plane | |
2582 | * | |
2583 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
2584 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2585 | */ | |
2586 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
2587 | { | |
321ebf04 DV |
2588 | if (plane->state && plane->state->fb) |
2589 | drm_framebuffer_unreference(plane->state->fb); | |
2590 | ||
d461701c DV |
2591 | kfree(plane->state); |
2592 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
07cc0ef6 | 2593 | |
25aaa3a1 | 2594 | if (plane->state) { |
07cc0ef6 | 2595 | plane->state->plane = plane; |
25aaa3a1 MS |
2596 | plane->state->rotation = BIT(DRM_ROTATE_0); |
2597 | } | |
d461701c DV |
2598 | } |
2599 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
2600 | ||
f5e7840b TR |
2601 | /** |
2602 | * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state | |
2603 | * @plane: plane object | |
2604 | * @state: atomic plane state | |
2605 | * | |
2606 | * Copies atomic state from a plane's current state. This is useful for | |
2607 | * drivers that subclass the plane state. | |
2608 | */ | |
2609 | void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane, | |
2610 | struct drm_plane_state *state) | |
2611 | { | |
2612 | memcpy(state, plane->state, sizeof(*state)); | |
2613 | ||
2614 | if (state->fb) | |
2615 | drm_framebuffer_reference(state->fb); | |
2616 | } | |
2617 | EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state); | |
2618 | ||
d461701c DV |
2619 | /** |
2620 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
2621 | * @plane: drm plane | |
2622 | * | |
2623 | * Default plane state duplicate hook for drivers which don't have their own | |
2624 | * subclassed plane state structure. | |
2625 | */ | |
2626 | struct drm_plane_state * | |
2627 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
2628 | { | |
321ebf04 DV |
2629 | struct drm_plane_state *state; |
2630 | ||
d461701c DV |
2631 | if (WARN_ON(!plane->state)) |
2632 | return NULL; | |
2633 | ||
f5e7840b TR |
2634 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2635 | if (state) | |
2636 | __drm_atomic_helper_plane_duplicate_state(plane, state); | |
321ebf04 DV |
2637 | |
2638 | return state; | |
d461701c DV |
2639 | } |
2640 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
2641 | ||
f5e7840b TR |
2642 | /** |
2643 | * __drm_atomic_helper_plane_destroy_state - release plane state | |
2644 | * @plane: plane object | |
2645 | * @state: plane state object to release | |
2646 | * | |
2647 | * Releases all resources stored in the plane state without actually freeing | |
2648 | * the memory of the plane state. This is useful for drivers that subclass the | |
2649 | * plane state. | |
2650 | */ | |
2651 | void __drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
2652 | struct drm_plane_state *state) | |
2653 | { | |
2654 | if (state->fb) | |
2655 | drm_framebuffer_unreference(state->fb); | |
2656 | } | |
2657 | EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state); | |
2658 | ||
d461701c DV |
2659 | /** |
2660 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
2661 | * @plane: drm plane | |
2662 | * @state: plane state object to release | |
2663 | * | |
2664 | * Default plane state destroy hook for drivers which don't have their own | |
2665 | * subclassed plane state structure. | |
2666 | */ | |
2667 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
321ebf04 | 2668 | struct drm_plane_state *state) |
d461701c | 2669 | { |
f5e7840b | 2670 | __drm_atomic_helper_plane_destroy_state(plane, state); |
d461701c DV |
2671 | kfree(state); |
2672 | } | |
2673 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
2674 | ||
4cd39917 ML |
2675 | /** |
2676 | * __drm_atomic_helper_connector_reset - reset state on connector | |
2677 | * @connector: drm connector | |
2678 | * @conn_state: connector state to assign | |
2679 | * | |
2680 | * Initializes the newly allocated @conn_state and assigns it to | |
2681 | * #connector ->state, usually required when initializing the drivers | |
2682 | * or when called from the ->reset hook. | |
2683 | * | |
2684 | * This is useful for drivers that subclass the connector state. | |
2685 | */ | |
2686 | void | |
2687 | __drm_atomic_helper_connector_reset(struct drm_connector *connector, | |
2688 | struct drm_connector_state *conn_state) | |
2689 | { | |
2690 | if (conn_state) | |
2691 | conn_state->connector = connector; | |
2692 | ||
2693 | connector->state = conn_state; | |
2694 | } | |
2695 | EXPORT_SYMBOL(__drm_atomic_helper_connector_reset); | |
2696 | ||
d461701c DV |
2697 | /** |
2698 | * drm_atomic_helper_connector_reset - default ->reset hook for connectors | |
2699 | * @connector: drm connector | |
2700 | * | |
2701 | * Resets the atomic state for @connector by freeing the state pointer (which | |
2702 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
2703 | * object. | |
2704 | */ | |
2705 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
2706 | { | |
4cd39917 ML |
2707 | struct drm_connector_state *conn_state = |
2708 | kzalloc(sizeof(*conn_state), GFP_KERNEL); | |
07cc0ef6 | 2709 | |
4cd39917 ML |
2710 | kfree(connector->state); |
2711 | __drm_atomic_helper_connector_reset(connector, conn_state); | |
d461701c DV |
2712 | } |
2713 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
2714 | ||
f5e7840b TR |
2715 | /** |
2716 | * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state | |
2717 | * @connector: connector object | |
2718 | * @state: atomic connector state | |
2719 | * | |
2720 | * Copies atomic state from a connector's current state. This is useful for | |
2721 | * drivers that subclass the connector state. | |
2722 | */ | |
2723 | void | |
2724 | __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector, | |
2725 | struct drm_connector_state *state) | |
2726 | { | |
2727 | memcpy(state, connector->state, sizeof(*state)); | |
2728 | } | |
2729 | EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state); | |
2730 | ||
d461701c DV |
2731 | /** |
2732 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
2733 | * @connector: drm connector | |
2734 | * | |
2735 | * Default connector state duplicate hook for drivers which don't have their own | |
2736 | * subclassed connector state structure. | |
2737 | */ | |
2738 | struct drm_connector_state * | |
2739 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
2740 | { | |
f5e7840b TR |
2741 | struct drm_connector_state *state; |
2742 | ||
d461701c DV |
2743 | if (WARN_ON(!connector->state)) |
2744 | return NULL; | |
2745 | ||
f5e7840b TR |
2746 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2747 | if (state) | |
2748 | __drm_atomic_helper_connector_duplicate_state(connector, state); | |
2749 | ||
2750 | return state; | |
d461701c DV |
2751 | } |
2752 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
2753 | ||
397fd77c TR |
2754 | /** |
2755 | * drm_atomic_helper_duplicate_state - duplicate an atomic state object | |
2756 | * @dev: DRM device | |
2757 | * @ctx: lock acquisition context | |
2758 | * | |
2759 | * Makes a copy of the current atomic state by looping over all objects and | |
14942760 TR |
2760 | * duplicating their respective states. This is used for example by suspend/ |
2761 | * resume support code to save the state prior to suspend such that it can | |
2762 | * be restored upon resume. | |
397fd77c TR |
2763 | * |
2764 | * Note that this treats atomic state as persistent between save and restore. | |
2765 | * Drivers must make sure that this is possible and won't result in confusion | |
2766 | * or erroneous behaviour. | |
2767 | * | |
2768 | * Note that if callers haven't already acquired all modeset locks this might | |
2769 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
2770 | * | |
2771 | * Returns: | |
2772 | * A pointer to the copy of the atomic state object on success or an | |
2773 | * ERR_PTR()-encoded error code on failure. | |
14942760 TR |
2774 | * |
2775 | * See also: | |
2776 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
397fd77c TR |
2777 | */ |
2778 | struct drm_atomic_state * | |
2779 | drm_atomic_helper_duplicate_state(struct drm_device *dev, | |
2780 | struct drm_modeset_acquire_ctx *ctx) | |
2781 | { | |
2782 | struct drm_atomic_state *state; | |
2783 | struct drm_connector *conn; | |
2784 | struct drm_plane *plane; | |
2785 | struct drm_crtc *crtc; | |
2786 | int err = 0; | |
2787 | ||
2788 | state = drm_atomic_state_alloc(dev); | |
2789 | if (!state) | |
2790 | return ERR_PTR(-ENOMEM); | |
2791 | ||
2792 | state->acquire_ctx = ctx; | |
2793 | ||
2794 | drm_for_each_crtc(crtc, dev) { | |
2795 | struct drm_crtc_state *crtc_state; | |
2796 | ||
2797 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2798 | if (IS_ERR(crtc_state)) { | |
2799 | err = PTR_ERR(crtc_state); | |
2800 | goto free; | |
2801 | } | |
2802 | } | |
2803 | ||
2804 | drm_for_each_plane(plane, dev) { | |
2805 | struct drm_plane_state *plane_state; | |
2806 | ||
2807 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2808 | if (IS_ERR(plane_state)) { | |
2809 | err = PTR_ERR(plane_state); | |
2810 | goto free; | |
2811 | } | |
2812 | } | |
2813 | ||
2814 | drm_for_each_connector(conn, dev) { | |
2815 | struct drm_connector_state *conn_state; | |
2816 | ||
2817 | conn_state = drm_atomic_get_connector_state(state, conn); | |
2818 | if (IS_ERR(conn_state)) { | |
2819 | err = PTR_ERR(conn_state); | |
2820 | goto free; | |
2821 | } | |
2822 | } | |
2823 | ||
2824 | /* clear the acquire context so that it isn't accidentally reused */ | |
2825 | state->acquire_ctx = NULL; | |
2826 | ||
2827 | free: | |
2828 | if (err < 0) { | |
2829 | drm_atomic_state_free(state); | |
2830 | state = ERR_PTR(err); | |
2831 | } | |
2832 | ||
2833 | return state; | |
2834 | } | |
2835 | EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); | |
2836 | ||
f5e7840b TR |
2837 | /** |
2838 | * __drm_atomic_helper_connector_destroy_state - release connector state | |
2839 | * @connector: connector object | |
2840 | * @state: connector state object to release | |
2841 | * | |
2842 | * Releases all resources stored in the connector state without actually | |
2843 | * freeing the memory of the connector state. This is useful for drivers that | |
2844 | * subclass the connector state. | |
2845 | */ | |
2846 | void | |
2847 | __drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
2848 | struct drm_connector_state *state) | |
2849 | { | |
2850 | /* | |
2851 | * This is currently a placeholder so that drivers that subclass the | |
2852 | * state will automatically do the right thing if code is ever added | |
2853 | * to this function. | |
2854 | */ | |
2855 | } | |
2856 | EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state); | |
2857 | ||
d461701c DV |
2858 | /** |
2859 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
2860 | * @connector: drm connector | |
2861 | * @state: connector state object to release | |
2862 | * | |
2863 | * Default connector state destroy hook for drivers which don't have their own | |
2864 | * subclassed connector state structure. | |
2865 | */ | |
2866 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
2867 | struct drm_connector_state *state) | |
2868 | { | |
f5e7840b | 2869 | __drm_atomic_helper_connector_destroy_state(connector, state); |
d461701c DV |
2870 | kfree(state); |
2871 | } | |
2872 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); |