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