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