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c2fcd274 DV |
1 | /* |
2 | * Copyright (C) 2014 Red Hat | |
3 | * Copyright (C) 2014 Intel Corp. | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a | |
6 | * copy of this software and associated documentation files (the "Software"), | |
7 | * to deal in the Software without restriction, including without limitation | |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | * and/or sell copies of the Software, and to permit persons to whom the | |
10 | * Software is furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
21 | * OTHER DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Rob Clark <robdclark@gmail.com> | |
25 | * Daniel Vetter <daniel.vetter@ffwll.ch> | |
26 | */ | |
27 | ||
28 | #include <drm/drmP.h> | |
29 | #include <drm/drm_atomic.h> | |
30 | #include <drm/drm_plane_helper.h> | |
31 | #include <drm/drm_crtc_helper.h> | |
623369e5 | 32 | #include <drm/drm_atomic_helper.h> |
e2330f07 | 33 | #include <linux/fence.h> |
c2fcd274 | 34 | |
3150c7d0 DV |
35 | /** |
36 | * DOC: overview | |
37 | * | |
38 | * This helper library provides implementations of check and commit functions on | |
39 | * top of the CRTC modeset helper callbacks and the plane helper callbacks. It | |
40 | * also provides convenience implementations for the atomic state handling | |
41 | * callbacks for drivers which don't need to subclass the drm core structures to | |
42 | * add their own additional internal state. | |
43 | * | |
44 | * This library also provides default implementations for the check callback in | |
26196f7e DV |
45 | * drm_atomic_helper_check() and for the commit callback with |
46 | * drm_atomic_helper_commit(). But the individual stages and callbacks are | |
47 | * exposed to allow drivers to mix and match and e.g. use the plane helpers only | |
3150c7d0 DV |
48 | * together with a driver private modeset implementation. |
49 | * | |
50 | * This library also provides implementations for all the legacy driver | |
26196f7e DV |
51 | * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(), |
52 | * drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the | |
3150c7d0 DV |
53 | * various functions to implement set_property callbacks. New drivers must not |
54 | * implement these functions themselves but must use the provided helpers. | |
092d01da DV |
55 | * |
56 | * The atomic helper uses the same function table structures as all other | |
57 | * modesetting helpers. See the documentation for struct &drm_crtc_helper_funcs, | |
58 | * struct &drm_encoder_helper_funcs and struct &drm_connector_helper_funcs. It | |
59 | * also shares the struct &drm_plane_helper_funcs function table with the plane | |
60 | * helpers. | |
3150c7d0 | 61 | */ |
c2fcd274 DV |
62 | static void |
63 | drm_atomic_helper_plane_changed(struct drm_atomic_state *state, | |
64 | struct drm_plane_state *plane_state, | |
65 | struct drm_plane *plane) | |
66 | { | |
67 | struct drm_crtc_state *crtc_state; | |
68 | ||
69 | if (plane->state->crtc) { | |
2943ef32 AH |
70 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
71 | plane->state->crtc); | |
c2fcd274 DV |
72 | |
73 | if (WARN_ON(!crtc_state)) | |
74 | return; | |
75 | ||
76 | crtc_state->planes_changed = true; | |
77 | } | |
78 | ||
79 | if (plane_state->crtc) { | |
2943ef32 AH |
80 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
81 | plane_state->crtc); | |
c2fcd274 DV |
82 | |
83 | if (WARN_ON(!crtc_state)) | |
84 | return; | |
85 | ||
86 | crtc_state->planes_changed = true; | |
87 | } | |
88 | } | |
89 | ||
8248b65d ML |
90 | static int handle_conflicting_encoders(struct drm_atomic_state *state, |
91 | bool disable_conflicting_encoders) | |
97ac3204 | 92 | { |
97ac3204 | 93 | struct drm_connector_state *conn_state; |
40616a26 ML |
94 | struct drm_connector *connector; |
95 | struct drm_encoder *encoder; | |
96 | unsigned encoder_mask = 0; | |
97 | int i, ret; | |
97ac3204 | 98 | |
8248b65d ML |
99 | /* |
100 | * First loop, find all newly assigned encoders from the connectors | |
101 | * part of the state. If the same encoder is assigned to multiple | |
102 | * connectors bail out. | |
103 | */ | |
97ac3204 | 104 | for_each_connector_in_state(state, connector, conn_state, i) { |
40616a26 ML |
105 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; |
106 | struct drm_encoder *new_encoder; | |
107 | ||
108 | if (!conn_state->crtc) | |
97ac3204 DV |
109 | continue; |
110 | ||
40616a26 ML |
111 | if (funcs->atomic_best_encoder) |
112 | new_encoder = funcs->atomic_best_encoder(connector, conn_state); | |
a0909cc5 | 113 | else if (funcs->best_encoder) |
40616a26 | 114 | new_encoder = funcs->best_encoder(connector); |
a0909cc5 BB |
115 | else |
116 | new_encoder = drm_atomic_helper_best_encoder(connector); | |
40616a26 | 117 | |
8248b65d ML |
118 | if (new_encoder) { |
119 | if (encoder_mask & (1 << drm_encoder_index(new_encoder))) { | |
120 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n", | |
121 | new_encoder->base.id, new_encoder->name, | |
122 | connector->base.id, connector->name); | |
123 | ||
124 | return -EINVAL; | |
125 | } | |
126 | ||
40616a26 | 127 | encoder_mask |= 1 << drm_encoder_index(new_encoder); |
8248b65d | 128 | } |
97ac3204 DV |
129 | } |
130 | ||
8248b65d ML |
131 | if (!encoder_mask) |
132 | return 0; | |
97ac3204 | 133 | |
8248b65d ML |
134 | /* |
135 | * Second loop, iterate over all connectors not part of the state. | |
136 | * | |
137 | * If a conflicting encoder is found and disable_conflicting_encoders | |
138 | * is not set, an error is returned. Userspace can provide a solution | |
139 | * through the atomic ioctl. | |
140 | * | |
141 | * If the flag is set conflicting connectors are removed from the crtc | |
142 | * and the crtc is disabled if no encoder is left. This preserves | |
143 | * compatibility with the legacy set_config behavior. | |
144 | */ | |
40616a26 ML |
145 | drm_for_each_connector(connector, state->dev) { |
146 | struct drm_crtc_state *crtc_state; | |
623369e5 | 147 | |
40616a26 ML |
148 | if (drm_atomic_get_existing_connector_state(state, connector)) |
149 | continue; | |
623369e5 | 150 | |
40616a26 ML |
151 | encoder = connector->state->best_encoder; |
152 | if (!encoder || !(encoder_mask & (1 << drm_encoder_index(encoder)))) | |
623369e5 DV |
153 | continue; |
154 | ||
8248b65d ML |
155 | if (!disable_conflicting_encoders) { |
156 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n", | |
157 | encoder->base.id, encoder->name, | |
158 | connector->state->crtc->base.id, | |
159 | connector->state->crtc->name, | |
160 | connector->base.id, connector->name); | |
161 | return -EINVAL; | |
162 | } | |
163 | ||
40616a26 ML |
164 | conn_state = drm_atomic_get_connector_state(state, connector); |
165 | if (IS_ERR(conn_state)) | |
166 | return PTR_ERR(conn_state); | |
167 | ||
168 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n", | |
169 | encoder->base.id, encoder->name, | |
170 | conn_state->crtc->base.id, conn_state->crtc->name, | |
171 | connector->base.id, connector->name); | |
172 | ||
173 | crtc_state = drm_atomic_get_existing_crtc_state(state, conn_state->crtc); | |
174 | ||
175 | ret = drm_atomic_set_crtc_for_connector(conn_state, NULL); | |
176 | if (ret) | |
177 | return ret; | |
178 | ||
179 | if (!crtc_state->connector_mask) { | |
180 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, | |
181 | NULL); | |
182 | if (ret < 0) | |
183 | return ret; | |
184 | ||
185 | crtc_state->active = false; | |
186 | } | |
623369e5 DV |
187 | } |
188 | ||
40616a26 | 189 | return 0; |
623369e5 DV |
190 | } |
191 | ||
e87a52b3 ML |
192 | static void |
193 | set_best_encoder(struct drm_atomic_state *state, | |
194 | struct drm_connector_state *conn_state, | |
195 | struct drm_encoder *encoder) | |
196 | { | |
197 | struct drm_crtc_state *crtc_state; | |
198 | struct drm_crtc *crtc; | |
199 | ||
200 | if (conn_state->best_encoder) { | |
201 | /* Unset the encoder_mask in the old crtc state. */ | |
202 | crtc = conn_state->connector->state->crtc; | |
203 | ||
204 | /* A NULL crtc is an error here because we should have | |
205 | * duplicated a NULL best_encoder when crtc was NULL. | |
206 | * As an exception restoring duplicated atomic state | |
207 | * during resume is allowed, so don't warn when | |
208 | * best_encoder is equal to encoder we intend to set. | |
209 | */ | |
210 | WARN_ON(!crtc && encoder != conn_state->best_encoder); | |
211 | if (crtc) { | |
212 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); | |
213 | ||
214 | crtc_state->encoder_mask &= | |
215 | ~(1 << drm_encoder_index(conn_state->best_encoder)); | |
216 | } | |
217 | } | |
218 | ||
219 | if (encoder) { | |
220 | crtc = conn_state->crtc; | |
221 | WARN_ON(!crtc); | |
222 | if (crtc) { | |
223 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); | |
224 | ||
225 | crtc_state->encoder_mask |= | |
226 | 1 << drm_encoder_index(encoder); | |
227 | } | |
228 | } | |
229 | ||
230 | conn_state->best_encoder = encoder; | |
231 | } | |
232 | ||
ec5aaa58 | 233 | static void |
623369e5 | 234 | steal_encoder(struct drm_atomic_state *state, |
ff19b786 | 235 | struct drm_encoder *encoder) |
623369e5 | 236 | { |
623369e5 DV |
237 | struct drm_crtc_state *crtc_state; |
238 | struct drm_connector *connector; | |
239 | struct drm_connector_state *connector_state; | |
ec5aaa58 | 240 | int i; |
623369e5 | 241 | |
ec5aaa58 | 242 | for_each_connector_in_state(state, connector, connector_state, i) { |
ff19b786 | 243 | struct drm_crtc *encoder_crtc; |
623369e5 | 244 | |
e87a52b3 | 245 | if (connector_state->best_encoder != encoder) |
623369e5 DV |
246 | continue; |
247 | ||
ff19b786 | 248 | encoder_crtc = connector->state->crtc; |
623369e5 | 249 | |
ff19b786 ML |
250 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n", |
251 | encoder->base.id, encoder->name, | |
252 | encoder_crtc->base.id, encoder_crtc->name); | |
e87a52b3 ML |
253 | |
254 | set_best_encoder(state, connector_state, NULL); | |
623369e5 | 255 | |
ff19b786 ML |
256 | crtc_state = drm_atomic_get_existing_crtc_state(state, encoder_crtc); |
257 | crtc_state->connectors_changed = true; | |
258 | ||
ec5aaa58 | 259 | return; |
623369e5 | 260 | } |
623369e5 DV |
261 | } |
262 | ||
263 | static int | |
9459545b ML |
264 | update_connector_routing(struct drm_atomic_state *state, |
265 | struct drm_connector *connector, | |
266 | struct drm_connector_state *connector_state) | |
623369e5 | 267 | { |
b5ceff20 | 268 | const struct drm_connector_helper_funcs *funcs; |
623369e5 | 269 | struct drm_encoder *new_encoder; |
623369e5 | 270 | struct drm_crtc_state *crtc_state; |
623369e5 | 271 | |
17a38d9c DV |
272 | DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n", |
273 | connector->base.id, | |
274 | connector->name); | |
623369e5 DV |
275 | |
276 | if (connector->state->crtc != connector_state->crtc) { | |
277 | if (connector->state->crtc) { | |
9b8d1e53 | 278 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector->state->crtc); |
fc596660 | 279 | crtc_state->connectors_changed = true; |
623369e5 DV |
280 | } |
281 | ||
282 | if (connector_state->crtc) { | |
9b8d1e53 | 283 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc); |
fc596660 | 284 | crtc_state->connectors_changed = true; |
623369e5 DV |
285 | } |
286 | } | |
287 | ||
288 | if (!connector_state->crtc) { | |
17a38d9c | 289 | DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n", |
623369e5 DV |
290 | connector->base.id, |
291 | connector->name); | |
292 | ||
e87a52b3 | 293 | set_best_encoder(state, connector_state, NULL); |
623369e5 DV |
294 | |
295 | return 0; | |
296 | } | |
297 | ||
298 | funcs = connector->helper_private; | |
3b8a684b DV |
299 | |
300 | if (funcs->atomic_best_encoder) | |
301 | new_encoder = funcs->atomic_best_encoder(connector, | |
302 | connector_state); | |
c61b93fe | 303 | else if (funcs->best_encoder) |
3b8a684b | 304 | new_encoder = funcs->best_encoder(connector); |
c61b93fe BB |
305 | else |
306 | new_encoder = drm_atomic_helper_best_encoder(connector); | |
623369e5 DV |
307 | |
308 | if (!new_encoder) { | |
17a38d9c DV |
309 | DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", |
310 | connector->base.id, | |
311 | connector->name); | |
623369e5 DV |
312 | return -EINVAL; |
313 | } | |
314 | ||
5481c8fb DV |
315 | if (!drm_encoder_crtc_ok(new_encoder, connector_state->crtc)) { |
316 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d]\n", | |
317 | new_encoder->base.id, | |
318 | new_encoder->name, | |
319 | connector_state->crtc->base.id); | |
320 | return -EINVAL; | |
321 | } | |
322 | ||
623369e5 | 323 | if (new_encoder == connector_state->best_encoder) { |
e87a52b3 ML |
324 | set_best_encoder(state, connector_state, new_encoder); |
325 | ||
fa3ab4c2 | 326 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n", |
17a38d9c DV |
327 | connector->base.id, |
328 | connector->name, | |
329 | new_encoder->base.id, | |
330 | new_encoder->name, | |
fa3ab4c2 VS |
331 | connector_state->crtc->base.id, |
332 | connector_state->crtc->name); | |
623369e5 DV |
333 | |
334 | return 0; | |
335 | } | |
336 | ||
ec5aaa58 | 337 | steal_encoder(state, new_encoder); |
6ea76f3c | 338 | |
e87a52b3 ML |
339 | set_best_encoder(state, connector_state, new_encoder); |
340 | ||
9b8d1e53 | 341 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc); |
fc596660 | 342 | crtc_state->connectors_changed = true; |
623369e5 | 343 | |
fa3ab4c2 | 344 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n", |
17a38d9c DV |
345 | connector->base.id, |
346 | connector->name, | |
347 | new_encoder->base.id, | |
348 | new_encoder->name, | |
fa3ab4c2 VS |
349 | connector_state->crtc->base.id, |
350 | connector_state->crtc->name); | |
623369e5 DV |
351 | |
352 | return 0; | |
353 | } | |
354 | ||
355 | static int | |
356 | mode_fixup(struct drm_atomic_state *state) | |
357 | { | |
df63b999 | 358 | struct drm_crtc *crtc; |
623369e5 | 359 | struct drm_crtc_state *crtc_state; |
df63b999 | 360 | struct drm_connector *connector; |
623369e5 DV |
361 | struct drm_connector_state *conn_state; |
362 | int i; | |
363 | bool ret; | |
364 | ||
df63b999 | 365 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
fc596660 ML |
366 | if (!crtc_state->mode_changed && |
367 | !crtc_state->connectors_changed) | |
623369e5 DV |
368 | continue; |
369 | ||
370 | drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); | |
371 | } | |
372 | ||
df63b999 | 373 | for_each_connector_in_state(state, connector, conn_state, i) { |
b5ceff20 | 374 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
375 | struct drm_encoder *encoder; |
376 | ||
623369e5 DV |
377 | WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); |
378 | ||
379 | if (!conn_state->crtc || !conn_state->best_encoder) | |
380 | continue; | |
381 | ||
2943ef32 AH |
382 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
383 | conn_state->crtc); | |
623369e5 DV |
384 | |
385 | /* | |
386 | * Each encoder has at most one connector (since we always steal | |
387 | * it away), so we won't call ->mode_fixup twice. | |
388 | */ | |
389 | encoder = conn_state->best_encoder; | |
390 | funcs = encoder->helper_private; | |
391 | ||
862e686c AT |
392 | ret = drm_bridge_mode_fixup(encoder->bridge, &crtc_state->mode, |
393 | &crtc_state->adjusted_mode); | |
394 | if (!ret) { | |
395 | DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); | |
396 | return -EINVAL; | |
623369e5 DV |
397 | } |
398 | ||
2827635e | 399 | if (funcs && funcs->atomic_check) { |
4cd4df80 TR |
400 | ret = funcs->atomic_check(encoder, crtc_state, |
401 | conn_state); | |
402 | if (ret) { | |
17a38d9c DV |
403 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", |
404 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
405 | return ret; |
406 | } | |
2827635e | 407 | } else if (funcs && funcs->mode_fixup) { |
4cd4df80 TR |
408 | ret = funcs->mode_fixup(encoder, &crtc_state->mode, |
409 | &crtc_state->adjusted_mode); | |
410 | if (!ret) { | |
17a38d9c DV |
411 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", |
412 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
413 | return -EINVAL; |
414 | } | |
623369e5 DV |
415 | } |
416 | } | |
417 | ||
df63b999 | 418 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 419 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 420 | |
f55f1701 LY |
421 | if (!crtc_state->enable) |
422 | continue; | |
423 | ||
fc596660 ML |
424 | if (!crtc_state->mode_changed && |
425 | !crtc_state->connectors_changed) | |
623369e5 DV |
426 | continue; |
427 | ||
428 | funcs = crtc->helper_private; | |
840bfe95 ACO |
429 | if (!funcs->mode_fixup) |
430 | continue; | |
431 | ||
623369e5 DV |
432 | ret = funcs->mode_fixup(crtc, &crtc_state->mode, |
433 | &crtc_state->adjusted_mode); | |
434 | if (!ret) { | |
fa3ab4c2 VS |
435 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n", |
436 | crtc->base.id, crtc->name); | |
623369e5 DV |
437 | return -EINVAL; |
438 | } | |
439 | } | |
440 | ||
441 | return 0; | |
442 | } | |
443 | ||
d9b13620 | 444 | /** |
f98bd3ef | 445 | * drm_atomic_helper_check_modeset - validate state object for modeset changes |
d9b13620 DV |
446 | * @dev: DRM device |
447 | * @state: the driver state object | |
448 | * | |
449 | * Check the state object to see if the requested state is physically possible. | |
450 | * This does all the crtc and connector related computations for an atomic | |
fc596660 ML |
451 | * update and adds any additional connectors needed for full modesets and calls |
452 | * down into ->mode_fixup functions of the driver backend. | |
453 | * | |
454 | * crtc_state->mode_changed is set when the input mode is changed. | |
455 | * crtc_state->connectors_changed is set when a connector is added or | |
456 | * removed from the crtc. | |
457 | * crtc_state->active_changed is set when crtc_state->active changes, | |
458 | * which is used for dpms. | |
d9b13620 DV |
459 | * |
460 | * IMPORTANT: | |
461 | * | |
462 | * Drivers which update ->mode_changed (e.g. in their ->atomic_check hooks if a | |
463 | * plane update can't be done without a full modeset) _must_ call this function | |
464 | * afterwards after that change. It is permitted to call this function multiple | |
465 | * times for the same update, e.g. when the ->atomic_check functions depend upon | |
466 | * the adjusted dotclock for fifo space allocation and watermark computation. | |
467 | * | |
c39032a8 | 468 | * RETURNS: |
d9b13620 DV |
469 | * Zero for success or -errno |
470 | */ | |
471 | int | |
934ce1c2 | 472 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
473 | struct drm_atomic_state *state) |
474 | { | |
623369e5 DV |
475 | struct drm_crtc *crtc; |
476 | struct drm_crtc_state *crtc_state; | |
df63b999 ACO |
477 | struct drm_connector *connector; |
478 | struct drm_connector_state *connector_state; | |
623369e5 DV |
479 | int i, ret; |
480 | ||
df63b999 | 481 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 | 482 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { |
fa3ab4c2 VS |
483 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n", |
484 | crtc->base.id, crtc->name); | |
623369e5 DV |
485 | crtc_state->mode_changed = true; |
486 | } | |
487 | ||
488 | if (crtc->state->enable != crtc_state->enable) { | |
fa3ab4c2 VS |
489 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n", |
490 | crtc->base.id, crtc->name); | |
fc596660 ML |
491 | |
492 | /* | |
493 | * For clarity this assignment is done here, but | |
494 | * enable == 0 is only true when there are no | |
495 | * connectors and a NULL mode. | |
496 | * | |
497 | * The other way around is true as well. enable != 0 | |
498 | * iff connectors are attached and a mode is set. | |
499 | */ | |
623369e5 | 500 | crtc_state->mode_changed = true; |
fc596660 | 501 | crtc_state->connectors_changed = true; |
623369e5 DV |
502 | } |
503 | } | |
504 | ||
8248b65d ML |
505 | ret = handle_conflicting_encoders(state, state->legacy_set_config); |
506 | if (ret) | |
507 | return ret; | |
40616a26 | 508 | |
df63b999 | 509 | for_each_connector_in_state(state, connector, connector_state, i) { |
623369e5 DV |
510 | /* |
511 | * This only sets crtc->mode_changed for routing changes, | |
512 | * drivers must set crtc->mode_changed themselves when connector | |
513 | * properties need to be updated. | |
514 | */ | |
9459545b ML |
515 | ret = update_connector_routing(state, connector, |
516 | connector_state); | |
623369e5 DV |
517 | if (ret) |
518 | return ret; | |
519 | } | |
520 | ||
521 | /* | |
522 | * After all the routing has been prepared we need to add in any | |
523 | * connector which is itself unchanged, but who's crtc changes it's | |
524 | * configuration. This must be done before calling mode_fixup in case a | |
525 | * crtc only changed its mode but has the same set of connectors. | |
526 | */ | |
df63b999 | 527 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
14de6c44 ML |
528 | bool has_connectors = |
529 | !!crtc_state->connector_mask; | |
623369e5 | 530 | |
eab3bbef DV |
531 | /* |
532 | * We must set ->active_changed after walking connectors for | |
533 | * otherwise an update that only changes active would result in | |
534 | * a full modeset because update_connector_routing force that. | |
535 | */ | |
536 | if (crtc->state->active != crtc_state->active) { | |
fa3ab4c2 VS |
537 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", |
538 | crtc->base.id, crtc->name); | |
eab3bbef DV |
539 | crtc_state->active_changed = true; |
540 | } | |
541 | ||
2465ff62 | 542 | if (!drm_atomic_crtc_needs_modeset(crtc_state)) |
623369e5 DV |
543 | continue; |
544 | ||
fa3ab4c2 VS |
545 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n", |
546 | crtc->base.id, crtc->name, | |
17a38d9c | 547 | crtc_state->enable ? 'y' : 'n', |
fa3ab4c2 | 548 | crtc_state->active ? 'y' : 'n'); |
623369e5 DV |
549 | |
550 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
551 | if (ret != 0) | |
552 | return ret; | |
553 | ||
57744aa7 ML |
554 | ret = drm_atomic_add_affected_planes(state, crtc); |
555 | if (ret != 0) | |
556 | return ret; | |
557 | ||
14de6c44 | 558 | if (crtc_state->enable != has_connectors) { |
fa3ab4c2 VS |
559 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", |
560 | crtc->base.id, crtc->name); | |
623369e5 DV |
561 | |
562 | return -EINVAL; | |
563 | } | |
564 | } | |
565 | ||
566 | return mode_fixup(state); | |
567 | } | |
d9b13620 | 568 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 569 | |
c2fcd274 | 570 | /** |
f98bd3ef | 571 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
572 | * @dev: DRM device |
573 | * @state: the driver state object | |
574 | * | |
575 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 DV |
576 | * This does all the plane update related checks using by calling into the |
577 | * ->atomic_check hooks provided by the driver. | |
c2fcd274 | 578 | * |
fc596660 ML |
579 | * It also sets crtc_state->planes_changed to indicate that a crtc has |
580 | * updated planes. | |
581 | * | |
c39032a8 | 582 | * RETURNS: |
c2fcd274 DV |
583 | * Zero for success or -errno |
584 | */ | |
d9b13620 DV |
585 | int |
586 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
587 | struct drm_atomic_state *state) | |
c2fcd274 | 588 | { |
df63b999 ACO |
589 | struct drm_crtc *crtc; |
590 | struct drm_crtc_state *crtc_state; | |
591 | struct drm_plane *plane; | |
592 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
593 | int i, ret = 0; |
594 | ||
df63b999 | 595 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 596 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
597 | |
598 | funcs = plane->helper_private; | |
599 | ||
600 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
601 | ||
602 | if (!funcs || !funcs->atomic_check) | |
603 | continue; | |
604 | ||
605 | ret = funcs->atomic_check(plane, plane_state); | |
606 | if (ret) { | |
9f4c97a2 VS |
607 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n", |
608 | plane->base.id, plane->name); | |
c2fcd274 DV |
609 | return ret; |
610 | } | |
611 | } | |
612 | ||
df63b999 | 613 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 614 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
615 | |
616 | funcs = crtc->helper_private; | |
617 | ||
618 | if (!funcs || !funcs->atomic_check) | |
619 | continue; | |
620 | ||
be9174a4 | 621 | ret = funcs->atomic_check(crtc, crtc_state); |
c2fcd274 | 622 | if (ret) { |
fa3ab4c2 VS |
623 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n", |
624 | crtc->base.id, crtc->name); | |
c2fcd274 DV |
625 | return ret; |
626 | } | |
627 | } | |
628 | ||
d9b13620 DV |
629 | return ret; |
630 | } | |
631 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
632 | ||
633 | /** | |
634 | * drm_atomic_helper_check - validate state object | |
635 | * @dev: DRM device | |
636 | * @state: the driver state object | |
637 | * | |
638 | * Check the state object to see if the requested state is physically possible. | |
639 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
640 | * checking that a driver needs it can simply wrap that around this function. | |
641 | * Drivers without such needs can directly use this as their ->atomic_check() | |
642 | * callback. | |
643 | * | |
b4274fbe DV |
644 | * This just wraps the two parts of the state checking for planes and modeset |
645 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
646 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
647 | * ->atomic_check functions depend upon an updated adjusted_mode.clock to | |
648 | * e.g. properly compute watermarks. | |
649 | * | |
c39032a8 | 650 | * RETURNS: |
d9b13620 DV |
651 | * Zero for success or -errno |
652 | */ | |
653 | int drm_atomic_helper_check(struct drm_device *dev, | |
654 | struct drm_atomic_state *state) | |
655 | { | |
656 | int ret; | |
657 | ||
b4274fbe | 658 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
659 | if (ret) |
660 | return ret; | |
661 | ||
b4274fbe | 662 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
663 | if (ret) |
664 | return ret; | |
665 | ||
c2fcd274 DV |
666 | return ret; |
667 | } | |
668 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
669 | ||
623369e5 DV |
670 | static void |
671 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
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 | ||
df63b999 | 679 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 680 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
681 | struct drm_encoder *encoder; |
682 | ||
623369e5 DV |
683 | /* Shut down everything that's in the changeset and currently |
684 | * still on. So need to check the old, saved state. */ | |
df63b999 | 685 | if (!old_conn_state->crtc) |
623369e5 DV |
686 | continue; |
687 | ||
2943ef32 AH |
688 | old_crtc_state = drm_atomic_get_existing_crtc_state(old_state, |
689 | old_conn_state->crtc); | |
eab3bbef | 690 | |
4218a32f | 691 | if (!old_crtc_state->active || |
2465ff62 | 692 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) |
eab3bbef DV |
693 | continue; |
694 | ||
46df9adb | 695 | encoder = old_conn_state->best_encoder; |
623369e5 | 696 | |
46df9adb RC |
697 | /* We shouldn't get this far if we didn't previously have |
698 | * an encoder.. but WARN_ON() rather than explode. | |
699 | */ | |
700 | if (WARN_ON(!encoder)) | |
623369e5 DV |
701 | continue; |
702 | ||
703 | funcs = encoder->helper_private; | |
704 | ||
17a38d9c DV |
705 | DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
706 | encoder->base.id, encoder->name); | |
95d6eb3b | 707 | |
623369e5 DV |
708 | /* |
709 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 710 | * it away), so we won't call disable hooks twice. |
623369e5 | 711 | */ |
862e686c | 712 | drm_bridge_disable(encoder->bridge); |
623369e5 DV |
713 | |
714 | /* Right function depends upon target state. */ | |
2827635e NT |
715 | if (funcs) { |
716 | if (connector->state->crtc && funcs->prepare) | |
717 | funcs->prepare(encoder); | |
718 | else if (funcs->disable) | |
719 | funcs->disable(encoder); | |
720 | else if (funcs->dpms) | |
721 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
722 | } | |
623369e5 | 723 | |
862e686c | 724 | drm_bridge_post_disable(encoder->bridge); |
623369e5 DV |
725 | } |
726 | ||
df63b999 | 727 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 728 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
729 | |
730 | /* Shut down everything that needs a full modeset. */ | |
2465ff62 | 731 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
732 | continue; |
733 | ||
734 | if (!old_crtc_state->active) | |
623369e5 DV |
735 | continue; |
736 | ||
737 | funcs = crtc->helper_private; | |
738 | ||
fa3ab4c2 VS |
739 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n", |
740 | crtc->base.id, crtc->name); | |
95d6eb3b DV |
741 | |
742 | ||
623369e5 | 743 | /* Right function depends upon target state. */ |
ee0a89cf | 744 | if (crtc->state->enable && funcs->prepare) |
623369e5 DV |
745 | funcs->prepare(crtc); |
746 | else if (funcs->disable) | |
747 | funcs->disable(crtc); | |
748 | else | |
749 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
750 | } | |
751 | } | |
752 | ||
4c18d301 DV |
753 | /** |
754 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state | |
755 | * @dev: DRM device | |
756 | * @old_state: atomic state object with old state structures | |
757 | * | |
758 | * This function updates all the various legacy modeset state pointers in | |
759 | * connectors, encoders and crtcs. It also updates the timestamping constants | |
760 | * used for precise vblank timestamps by calling | |
761 | * drm_calc_timestamping_constants(). | |
762 | * | |
763 | * Drivers can use this for building their own atomic commit if they don't have | |
764 | * a pure helper-based modeset implementation. | |
765 | */ | |
766 | void | |
767 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, | |
768 | struct drm_atomic_state *old_state) | |
623369e5 | 769 | { |
df63b999 ACO |
770 | struct drm_connector *connector; |
771 | struct drm_connector_state *old_conn_state; | |
772 | struct drm_crtc *crtc; | |
773 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
774 | int i; |
775 | ||
8c10342c | 776 | /* clear out existing links and update dpms */ |
df63b999 | 777 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
8c10342c ML |
778 | if (connector->encoder) { |
779 | WARN_ON(!connector->encoder->crtc); | |
780 | ||
781 | connector->encoder->crtc = NULL; | |
782 | connector->encoder = NULL; | |
783 | } | |
623369e5 | 784 | |
8c10342c ML |
785 | crtc = connector->state->crtc; |
786 | if ((!crtc && old_conn_state->crtc) || | |
787 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { | |
788 | struct drm_property *dpms_prop = | |
789 | dev->mode_config.dpms_property; | |
790 | int mode = DRM_MODE_DPMS_OFF; | |
623369e5 | 791 | |
8c10342c ML |
792 | if (crtc && crtc->state->active) |
793 | mode = DRM_MODE_DPMS_ON; | |
794 | ||
795 | connector->dpms = mode; | |
796 | drm_object_property_set_value(&connector->base, | |
797 | dpms_prop, mode); | |
798 | } | |
623369e5 DV |
799 | } |
800 | ||
801 | /* set new links */ | |
df63b999 ACO |
802 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
803 | if (!connector->state->crtc) | |
623369e5 DV |
804 | continue; |
805 | ||
806 | if (WARN_ON(!connector->state->best_encoder)) | |
807 | continue; | |
808 | ||
809 | connector->encoder = connector->state->best_encoder; | |
810 | connector->encoder->crtc = connector->state->crtc; | |
811 | } | |
812 | ||
813 | /* set legacy state in the crtc structure */ | |
df63b999 | 814 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
2660801f ML |
815 | struct drm_plane *primary = crtc->primary; |
816 | ||
623369e5 DV |
817 | crtc->mode = crtc->state->mode; |
818 | crtc->enabled = crtc->state->enable; | |
2660801f ML |
819 | |
820 | if (drm_atomic_get_existing_plane_state(old_state, primary) && | |
821 | primary->state->crtc == crtc) { | |
822 | crtc->x = primary->state->src_x >> 16; | |
823 | crtc->y = primary->state->src_y >> 16; | |
824 | } | |
3d51d2d2 DV |
825 | |
826 | if (crtc->state->enable) | |
827 | drm_calc_timestamping_constants(crtc, | |
828 | &crtc->state->adjusted_mode); | |
623369e5 DV |
829 | } |
830 | } | |
4c18d301 | 831 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); |
623369e5 DV |
832 | |
833 | static void | |
834 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
835 | { | |
df63b999 ACO |
836 | struct drm_crtc *crtc; |
837 | struct drm_crtc_state *old_crtc_state; | |
838 | struct drm_connector *connector; | |
839 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
840 | int i; |
841 | ||
df63b999 | 842 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 843 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 844 | |
df63b999 | 845 | if (!crtc->state->mode_changed) |
623369e5 DV |
846 | continue; |
847 | ||
848 | funcs = crtc->helper_private; | |
849 | ||
c982bd90 | 850 | if (crtc->state->enable && funcs->mode_set_nofb) { |
fa3ab4c2 VS |
851 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n", |
852 | crtc->base.id, crtc->name); | |
95d6eb3b | 853 | |
623369e5 | 854 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 855 | } |
623369e5 DV |
856 | } |
857 | ||
df63b999 | 858 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 859 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 860 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
861 | struct drm_encoder *encoder; |
862 | struct drm_display_mode *mode, *adjusted_mode; | |
863 | ||
df63b999 | 864 | if (!connector->state->best_encoder) |
623369e5 DV |
865 | continue; |
866 | ||
867 | encoder = connector->state->best_encoder; | |
868 | funcs = encoder->helper_private; | |
869 | new_crtc_state = connector->state->crtc->state; | |
870 | mode = &new_crtc_state->mode; | |
871 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
872 | ||
eab3bbef DV |
873 | if (!new_crtc_state->mode_changed) |
874 | continue; | |
875 | ||
17a38d9c DV |
876 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
877 | encoder->base.id, encoder->name); | |
95d6eb3b | 878 | |
623369e5 DV |
879 | /* |
880 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 881 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 882 | */ |
2827635e | 883 | if (funcs && funcs->mode_set) |
c982bd90 | 884 | funcs->mode_set(encoder, mode, adjusted_mode); |
623369e5 | 885 | |
862e686c | 886 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
623369e5 DV |
887 | } |
888 | } | |
889 | ||
890 | /** | |
1af434a9 | 891 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 892 | * @dev: DRM device |
a072f809 | 893 | * @old_state: atomic state object with old state structures |
623369e5 | 894 | * |
1af434a9 | 895 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 896 | * prepares them (if required) with the new mode. |
1af434a9 | 897 | * |
60acc4eb | 898 | * For compatibility with legacy crtc helpers this should be called before |
1af434a9 DV |
899 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
900 | * does. But drivers with different needs can group the modeset commits together | |
901 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
902 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 903 | */ |
1af434a9 DV |
904 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
905 | struct drm_atomic_state *old_state) | |
623369e5 | 906 | { |
a072f809 | 907 | disable_outputs(dev, old_state); |
4c18d301 DV |
908 | |
909 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); | |
910 | ||
a072f809 | 911 | crtc_set_mode(dev, old_state); |
623369e5 | 912 | } |
1af434a9 | 913 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 DV |
914 | |
915 | /** | |
1af434a9 | 916 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
917 | * @dev: DRM device |
918 | * @old_state: atomic state object with old state structures | |
919 | * | |
1af434a9 DV |
920 | * This function enables all the outputs with the new configuration which had to |
921 | * be turned off for the update. | |
922 | * | |
60acc4eb | 923 | * For compatibility with legacy crtc helpers this should be called after |
1af434a9 DV |
924 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
925 | * does. But drivers with different needs can group the modeset commits together | |
926 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
927 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 928 | */ |
1af434a9 DV |
929 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
930 | struct drm_atomic_state *old_state) | |
623369e5 | 931 | { |
df63b999 ACO |
932 | struct drm_crtc *crtc; |
933 | struct drm_crtc_state *old_crtc_state; | |
934 | struct drm_connector *connector; | |
935 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
936 | int i; |
937 | ||
df63b999 | 938 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 939 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
940 | |
941 | /* Need to filter out CRTCs where only planes change. */ | |
2465ff62 | 942 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
943 | continue; |
944 | ||
945 | if (!crtc->state->active) | |
623369e5 DV |
946 | continue; |
947 | ||
948 | funcs = crtc->helper_private; | |
949 | ||
ee0a89cf | 950 | if (crtc->state->enable) { |
fa3ab4c2 VS |
951 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n", |
952 | crtc->base.id, crtc->name); | |
95d6eb3b | 953 | |
ee0a89cf DV |
954 | if (funcs->enable) |
955 | funcs->enable(crtc); | |
956 | else | |
957 | funcs->commit(crtc); | |
958 | } | |
623369e5 DV |
959 | } |
960 | ||
df63b999 | 961 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 962 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
963 | struct drm_encoder *encoder; |
964 | ||
df63b999 | 965 | if (!connector->state->best_encoder) |
623369e5 DV |
966 | continue; |
967 | ||
4218a32f | 968 | if (!connector->state->crtc->state->active || |
2465ff62 | 969 | !drm_atomic_crtc_needs_modeset(connector->state->crtc->state)) |
eab3bbef DV |
970 | continue; |
971 | ||
623369e5 DV |
972 | encoder = connector->state->best_encoder; |
973 | funcs = encoder->helper_private; | |
974 | ||
17a38d9c DV |
975 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
976 | encoder->base.id, encoder->name); | |
95d6eb3b | 977 | |
623369e5 DV |
978 | /* |
979 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 980 | * it away), so we won't call enable hooks twice. |
623369e5 | 981 | */ |
862e686c | 982 | drm_bridge_pre_enable(encoder->bridge); |
623369e5 | 983 | |
2827635e NT |
984 | if (funcs) { |
985 | if (funcs->enable) | |
986 | funcs->enable(encoder); | |
987 | else if (funcs->commit) | |
988 | funcs->commit(encoder); | |
989 | } | |
623369e5 | 990 | |
862e686c | 991 | drm_bridge_enable(encoder->bridge); |
623369e5 DV |
992 | } |
993 | } | |
1af434a9 | 994 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 995 | |
4c5b7f3a RC |
996 | /** |
997 | * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state | |
998 | * @dev: DRM device | |
999 | * @state: atomic state object with old state structures | |
1000 | * | |
1001 | * For implicit sync, driver should fish the exclusive fence out from the | |
1002 | * incoming fb's and stash it in the drm_plane_state. This is called after | |
1003 | * drm_atomic_helper_swap_state() so it uses the current plane state (and | |
1004 | * just uses the atomic state to find the changed planes) | |
1005 | */ | |
1006 | void drm_atomic_helper_wait_for_fences(struct drm_device *dev, | |
e2330f07 DV |
1007 | struct drm_atomic_state *state) |
1008 | { | |
df63b999 ACO |
1009 | struct drm_plane *plane; |
1010 | struct drm_plane_state *plane_state; | |
e2330f07 DV |
1011 | int i; |
1012 | ||
df63b999 ACO |
1013 | for_each_plane_in_state(state, plane, plane_state, i) { |
1014 | if (!plane->state->fence) | |
e2330f07 DV |
1015 | continue; |
1016 | ||
1017 | WARN_ON(!plane->state->fb); | |
1018 | ||
1019 | fence_wait(plane->state->fence, false); | |
1020 | fence_put(plane->state->fence); | |
1021 | plane->state->fence = NULL; | |
1022 | } | |
1023 | } | |
4c5b7f3a | 1024 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences); |
e2330f07 | 1025 | |
c240906d JK |
1026 | /** |
1027 | * drm_atomic_helper_framebuffer_changed - check if framebuffer has changed | |
1028 | * @dev: DRM device | |
1029 | * @old_state: atomic state object with old state structures | |
1030 | * @crtc: DRM crtc | |
1031 | * | |
1032 | * Checks whether the framebuffer used for this CRTC changes as a result of | |
1033 | * the atomic update. This is useful for drivers which cannot use | |
1034 | * drm_atomic_helper_wait_for_vblanks() and need to reimplement its | |
1035 | * functionality. | |
1036 | * | |
1037 | * Returns: | |
1038 | * true if the framebuffer changed. | |
1039 | */ | |
1040 | bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev, | |
1041 | struct drm_atomic_state *old_state, | |
1042 | struct drm_crtc *crtc) | |
ab58e338 DV |
1043 | { |
1044 | struct drm_plane *plane; | |
1045 | struct drm_plane_state *old_plane_state; | |
ab58e338 DV |
1046 | int i; |
1047 | ||
df63b999 | 1048 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
ab58e338 DV |
1049 | if (plane->state->crtc != crtc && |
1050 | old_plane_state->crtc != crtc) | |
1051 | continue; | |
1052 | ||
1053 | if (plane->state->fb != old_plane_state->fb) | |
1054 | return true; | |
1055 | } | |
1056 | ||
1057 | return false; | |
1058 | } | |
c240906d | 1059 | EXPORT_SYMBOL(drm_atomic_helper_framebuffer_changed); |
ab58e338 | 1060 | |
5ee3229c RC |
1061 | /** |
1062 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
1063 | * @dev: DRM device | |
1064 | * @old_state: atomic state object with old state structures | |
1065 | * | |
1066 | * Helper to, after atomic commit, wait for vblanks on all effected | |
1067 | * crtcs (ie. before cleaning up old framebuffers using | |
ab58e338 DV |
1068 | * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
1069 | * framebuffers have actually changed to optimize for the legacy cursor and | |
1070 | * plane update use-case. | |
5ee3229c RC |
1071 | */ |
1072 | void | |
1073 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
1074 | struct drm_atomic_state *old_state) | |
623369e5 DV |
1075 | { |
1076 | struct drm_crtc *crtc; | |
1077 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
1078 | int i, ret; |
1079 | ||
df63b999 | 1080 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
623369e5 DV |
1081 | /* No one cares about the old state, so abuse it for tracking |
1082 | * and store whether we hold a vblank reference (and should do a | |
1083 | * vblank wait) in the ->enable boolean. */ | |
1084 | old_crtc_state->enable = false; | |
1085 | ||
1086 | if (!crtc->state->enable) | |
1087 | continue; | |
1088 | ||
f02ad907 DV |
1089 | /* Legacy cursor ioctls are completely unsynced, and userspace |
1090 | * relies on that (by doing tons of cursor updates). */ | |
1091 | if (old_state->legacy_cursor_update) | |
1092 | continue; | |
1093 | ||
c240906d JK |
1094 | if (!drm_atomic_helper_framebuffer_changed(dev, |
1095 | old_state, crtc)) | |
ab58e338 DV |
1096 | continue; |
1097 | ||
623369e5 DV |
1098 | ret = drm_crtc_vblank_get(crtc); |
1099 | if (ret != 0) | |
1100 | continue; | |
1101 | ||
1102 | old_crtc_state->enable = true; | |
d4853630 | 1103 | old_crtc_state->last_vblank_count = drm_crtc_vblank_count(crtc); |
623369e5 DV |
1104 | } |
1105 | ||
df63b999 ACO |
1106 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
1107 | if (!old_crtc_state->enable) | |
623369e5 DV |
1108 | continue; |
1109 | ||
1110 | ret = wait_event_timeout(dev->vblank[i].queue, | |
1111 | old_crtc_state->last_vblank_count != | |
d4853630 | 1112 | drm_crtc_vblank_count(crtc), |
623369e5 DV |
1113 | msecs_to_jiffies(50)); |
1114 | ||
8d4d0d70 VS |
1115 | WARN(!ret, "[CRTC:%d] vblank wait timed out\n", crtc->base.id); |
1116 | ||
623369e5 DV |
1117 | drm_crtc_vblank_put(crtc); |
1118 | } | |
1119 | } | |
5ee3229c | 1120 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 DV |
1121 | |
1122 | /** | |
9f2a7950 DV |
1123 | * drm_atomic_helper_commit_tail - commit atomic update to hardware |
1124 | * @state: new modeset state to be committed | |
623369e5 | 1125 | * |
9f2a7950 DV |
1126 | * This is the default implemenation for the ->atomic_commit_tail() hook of the |
1127 | * &drm_mode_config_helper_funcs vtable. | |
623369e5 | 1128 | * |
9f2a7950 DV |
1129 | * Note that the default ordering of how the various stages are called is to |
1130 | * match the legacy modeset helper library closest. One peculiarity of that is | |
1131 | * that it doesn't mesh well with runtime PM at all. | |
6e48ae32 | 1132 | * |
9f2a7950 | 1133 | * For drivers supporting runtime PM the recommended sequence is instead :: |
6e48ae32 DV |
1134 | * |
1135 | * drm_atomic_helper_commit_modeset_disables(dev, state); | |
1136 | * | |
1137 | * drm_atomic_helper_commit_modeset_enables(dev, state); | |
1138 | * | |
1139 | * drm_atomic_helper_commit_planes(dev, state, true); | |
1140 | * | |
9f2a7950 DV |
1141 | * for committing the atomic update to hardware. See the kerneldoc entries for |
1142 | * these three functions for more details. | |
1143 | */ | |
1144 | void drm_atomic_helper_commit_tail(struct drm_atomic_state *state) | |
1145 | { | |
1146 | struct drm_device *dev = state->dev; | |
1147 | ||
1148 | drm_atomic_helper_commit_modeset_disables(dev, state); | |
1149 | ||
1150 | drm_atomic_helper_commit_planes(dev, state, false); | |
1151 | ||
1152 | drm_atomic_helper_commit_modeset_enables(dev, state); | |
1153 | ||
1154 | drm_atomic_helper_commit_hw_done(state); | |
1155 | ||
1156 | drm_atomic_helper_wait_for_vblanks(dev, state); | |
1157 | ||
1158 | drm_atomic_helper_cleanup_planes(dev, state); | |
1159 | } | |
1160 | EXPORT_SYMBOL(drm_atomic_helper_commit_tail); | |
1161 | ||
1162 | static void commit_tail(struct drm_atomic_state *state) | |
1163 | { | |
1164 | struct drm_device *dev = state->dev; | |
1165 | struct drm_mode_config_helper_funcs *funcs; | |
1166 | ||
1167 | funcs = dev->mode_config.helper_private; | |
1168 | ||
1169 | drm_atomic_helper_wait_for_fences(dev, state); | |
1170 | ||
1171 | drm_atomic_helper_wait_for_dependencies(state); | |
1172 | ||
1173 | if (funcs && funcs->atomic_commit_tail) | |
1174 | funcs->atomic_commit_tail(state); | |
1175 | else | |
1176 | drm_atomic_helper_commit_tail(state); | |
1177 | ||
1178 | drm_atomic_helper_commit_cleanup_done(state); | |
1179 | ||
1180 | drm_atomic_state_free(state); | |
1181 | } | |
1182 | ||
1183 | static void commit_work(struct work_struct *work) | |
1184 | { | |
1185 | struct drm_atomic_state *state = container_of(work, | |
1186 | struct drm_atomic_state, | |
1187 | commit_work); | |
1188 | commit_tail(state); | |
1189 | } | |
1190 | ||
1191 | /** | |
1192 | * drm_atomic_helper_commit - commit validated state object | |
1193 | * @dev: DRM device | |
1194 | * @state: the driver state object | |
1195 | * @nonblock: whether nonblocking behavior is requested. | |
1196 | * | |
1197 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
1198 | * object. This can still fail when e.g. the framebuffer reservation fails. This | |
1199 | * function implements nonblocking commits, using | |
1200 | * drm_atomic_helper_setup_commit() and related functions. | |
1201 | * | |
1202 | * Note that right now this function does not support nonblocking commits, hence | |
1203 | * driver writers must implement their own version for now. | |
1204 | * | |
1205 | * Committing the actual hardware state is done through the | |
1206 | * ->atomic_commit_tail() callback of the &drm_mode_config_helper_funcs vtable, | |
1207 | * or it's default implementation drm_atomic_helper_commit_tail(). | |
6e48ae32 | 1208 | * |
c39032a8 | 1209 | * RETURNS: |
623369e5 DV |
1210 | * Zero for success or -errno. |
1211 | */ | |
1212 | int drm_atomic_helper_commit(struct drm_device *dev, | |
1213 | struct drm_atomic_state *state, | |
286dbb8d | 1214 | bool nonblock) |
623369e5 DV |
1215 | { |
1216 | int ret; | |
1217 | ||
a095caa7 DV |
1218 | ret = drm_atomic_helper_setup_commit(state, nonblock); |
1219 | if (ret) | |
1220 | return ret; | |
1221 | ||
9f2a7950 DV |
1222 | INIT_WORK(&state->commit_work, commit_work); |
1223 | ||
623369e5 DV |
1224 | ret = drm_atomic_helper_prepare_planes(dev, state); |
1225 | if (ret) | |
1226 | return ret; | |
1227 | ||
1228 | /* | |
1229 | * This is the point of no return - everything below never fails except | |
1230 | * when the hw goes bonghits. Which means we can commit the new state on | |
1231 | * the software side now. | |
1232 | */ | |
1233 | ||
5e84c269 | 1234 | drm_atomic_helper_swap_state(state, true); |
623369e5 DV |
1235 | |
1236 | /* | |
1237 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 1238 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
1239 | * that the asynchronous work has either been cancelled (if the driver |
1240 | * supports it, which at least requires that the framebuffers get | |
1241 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
1242 | * before the new state gets committed on the software side with | |
1243 | * drm_atomic_helper_swap_state(). | |
1244 | * | |
1245 | * This scheme allows new atomic state updates to be prepared and | |
1246 | * checked in parallel to the asynchronous completion of the previous | |
1247 | * update. Which is important since compositors need to figure out the | |
1248 | * composition of the next frame right after having submitted the | |
1249 | * current layout. | |
9f2a7950 DV |
1250 | * |
1251 | * NOTE: Commit work has multiple phases, first hardware commit, then | |
1252 | * cleanup. We want them to overlap, hence need system_unbound_wq to | |
1253 | * make sure work items don't artifically stall on each another. | |
623369e5 DV |
1254 | */ |
1255 | ||
9f2a7950 DV |
1256 | if (nonblock) |
1257 | queue_work(system_unbound_wq, &state->commit_work); | |
1258 | else | |
1259 | commit_tail(state); | |
623369e5 DV |
1260 | |
1261 | return 0; | |
1262 | } | |
1263 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1264 | ||
e8c833a7 | 1265 | /** |
286dbb8d | 1266 | * DOC: implementing nonblocking commit |
e8c833a7 | 1267 | * |
9f2a7950 | 1268 | * Nonblocking atomic commits have to be implemented in the following sequence: |
e8c833a7 DV |
1269 | * |
1270 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
1271 | * which commit needs to call which can fail, so we want to run it first and | |
1272 | * synchronously. | |
1273 | * | |
286dbb8d | 1274 | * 2. Synchronize with any outstanding nonblocking commit worker threads which |
e8c833a7 DV |
1275 | * might be affected the new state update. This can be done by either cancelling |
1276 | * or flushing the work items, depending upon whether the driver can deal with | |
1277 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
1278 | * cleanup is still done when cancelling. | |
1279 | * | |
9f2a7950 DV |
1280 | * Asynchronous workers need to have sufficient parallelism to be able to run |
1281 | * different atomic commits on different CRTCs in parallel. The simplest way to | |
1282 | * achive this is by running them on the &system_unbound_wq work queue. Note | |
1283 | * that drivers are not required to split up atomic commits and run an | |
1284 | * individual commit in parallel - userspace is supposed to do that if it cares. | |
1285 | * But it might be beneficial to do that for modesets, since those necessarily | |
1286 | * must be done as one global operation, and enabling or disabling a CRTC can | |
1287 | * take a long time. But even that is not required. | |
e8c833a7 DV |
1288 | * |
1289 | * 3. The software state is updated synchronously with | |
26196f7e | 1290 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
e8c833a7 | 1291 | * locks means concurrent callers never see inconsistent state. And doing this |
286dbb8d ML |
1292 | * while it's guaranteed that no relevant nonblocking worker runs means that |
1293 | * nonblocking workers do not need grab any locks. Actually they must not grab | |
1294 | * locks, for otherwise the work flushing will deadlock. | |
e8c833a7 DV |
1295 | * |
1296 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1297 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1298 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
1299 | * being displayed. | |
9f2a7950 DV |
1300 | * |
1301 | * The above scheme is implemented in the atomic helper libraries in | |
1302 | * drm_atomic_helper_commit() using a bunch of helper functions. See | |
1303 | * drm_atomic_helper_setup_commit() for a starting point. | |
e8c833a7 DV |
1304 | */ |
1305 | ||
a095caa7 DV |
1306 | static int stall_checks(struct drm_crtc *crtc, bool nonblock) |
1307 | { | |
1308 | struct drm_crtc_commit *commit, *stall_commit = NULL; | |
1309 | bool completed = true; | |
1310 | int i; | |
1311 | long ret = 0; | |
1312 | ||
1313 | spin_lock(&crtc->commit_lock); | |
1314 | i = 0; | |
1315 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) { | |
1316 | if (i == 0) { | |
1317 | completed = try_wait_for_completion(&commit->flip_done); | |
1318 | /* Userspace is not allowed to get ahead of the previous | |
1319 | * commit with nonblocking ones. */ | |
1320 | if (!completed && nonblock) { | |
1321 | spin_unlock(&crtc->commit_lock); | |
1322 | return -EBUSY; | |
1323 | } | |
1324 | } else if (i == 1) { | |
1325 | stall_commit = commit; | |
1326 | drm_crtc_commit_get(stall_commit); | |
a095caa7 | 1327 | break; |
723c3e55 | 1328 | } |
a095caa7 DV |
1329 | |
1330 | i++; | |
1331 | } | |
1332 | spin_unlock(&crtc->commit_lock); | |
1333 | ||
1334 | if (!stall_commit) | |
1335 | return 0; | |
1336 | ||
1337 | /* We don't want to let commits get ahead of cleanup work too much, | |
1338 | * stalling on 2nd previous commit means triple-buffer won't ever stall. | |
1339 | */ | |
723c3e55 | 1340 | ret = wait_for_completion_interruptible_timeout(&stall_commit->cleanup_done, |
a095caa7 DV |
1341 | 10*HZ); |
1342 | if (ret == 0) | |
1343 | DRM_ERROR("[CRTC:%d:%s] cleanup_done timed out\n", | |
1344 | crtc->base.id, crtc->name); | |
1345 | ||
1346 | drm_crtc_commit_put(stall_commit); | |
1347 | ||
1348 | return ret < 0 ? ret : 0; | |
1349 | } | |
1350 | ||
1351 | /** | |
1352 | * drm_atomic_helper_setup_commit - setup possibly nonblocking commit | |
1353 | * @state: new modeset state to be committed | |
1354 | * @nonblock: whether nonblocking behavior is requested. | |
1355 | * | |
1356 | * This function prepares @state to be used by the atomic helper's support for | |
1357 | * nonblocking commits. Drivers using the nonblocking commit infrastructure | |
1358 | * should always call this function from their ->atomic_commit hook. | |
1359 | * | |
1360 | * To be able to use this support drivers need to use a few more helper | |
1361 | * functions. drm_atomic_helper_wait_for_dependencies() must be called before | |
1362 | * actually committing the hardware state, and for nonblocking commits this call | |
1363 | * must be placed in the async worker. See also drm_atomic_helper_swap_state() | |
1364 | * and it's stall parameter, for when a driver's commit hooks look at the | |
1365 | * ->state pointers of struct &drm_crtc, &drm_plane or &drm_connector directly. | |
1366 | * | |
1367 | * Completion of the hardware commit step must be signalled using | |
1368 | * drm_atomic_helper_commit_hw_done(). After this step the driver is not allowed | |
1369 | * to read or change any permanent software or hardware modeset state. The only | |
1370 | * exception is state protected by other means than &drm_modeset_lock locks. | |
1371 | * Only the free standing @state with pointers to the old state structures can | |
1372 | * be inspected, e.g. to clean up old buffers using | |
1373 | * drm_atomic_helper_cleanup_planes(). | |
1374 | * | |
1375 | * At the very end, before cleaning up @state drivers must call | |
1376 | * drm_atomic_helper_commit_cleanup_done(). | |
1377 | * | |
1378 | * This is all implemented by in drm_atomic_helper_commit(), giving drivers a | |
1379 | * complete and esay-to-use default implementation of the atomic_commit() hook. | |
1380 | * | |
1381 | * The tracking of asynchronously executed and still pending commits is done | |
1382 | * using the core structure &drm_crtc_commit. | |
1383 | * | |
1384 | * By default there's no need to clean up resources allocated by this function | |
1385 | * explicitly: drm_atomic_state_default_clear() will take care of that | |
1386 | * automatically. | |
1387 | * | |
1388 | * Returns: | |
1389 | * | |
1390 | * 0 on success. -EBUSY when userspace schedules nonblocking commits too fast, | |
1391 | * -ENOMEM on allocation failures and -EINTR when a signal is pending. | |
1392 | */ | |
1393 | int drm_atomic_helper_setup_commit(struct drm_atomic_state *state, | |
1394 | bool nonblock) | |
1395 | { | |
1396 | struct drm_crtc *crtc; | |
1397 | struct drm_crtc_state *crtc_state; | |
1398 | struct drm_crtc_commit *commit; | |
1399 | int i, ret; | |
1400 | ||
1401 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1402 | commit = kzalloc(sizeof(*commit), GFP_KERNEL); | |
1403 | if (!commit) | |
1404 | return -ENOMEM; | |
1405 | ||
1406 | init_completion(&commit->flip_done); | |
1407 | init_completion(&commit->hw_done); | |
1408 | init_completion(&commit->cleanup_done); | |
1409 | INIT_LIST_HEAD(&commit->commit_entry); | |
1410 | kref_init(&commit->ref); | |
1411 | commit->crtc = crtc; | |
1412 | ||
1413 | state->crtcs[i].commit = commit; | |
1414 | ||
1415 | ret = stall_checks(crtc, nonblock); | |
1416 | if (ret) | |
1417 | return ret; | |
1418 | ||
1419 | /* Drivers only send out events when at least either current or | |
1420 | * new CRTC state is active. Complete right away if everything | |
1421 | * stays off. */ | |
1422 | if (!crtc->state->active && !crtc_state->active) { | |
1423 | complete_all(&commit->flip_done); | |
1424 | continue; | |
1425 | } | |
1426 | ||
1427 | /* Legacy cursor updates are fully unsynced. */ | |
1428 | if (state->legacy_cursor_update) { | |
1429 | complete_all(&commit->flip_done); | |
1430 | continue; | |
1431 | } | |
1432 | ||
1433 | if (!crtc_state->event) { | |
1434 | commit->event = kzalloc(sizeof(*commit->event), | |
1435 | GFP_KERNEL); | |
1436 | if (!commit->event) | |
1437 | return -ENOMEM; | |
1438 | ||
1439 | crtc_state->event = commit->event; | |
1440 | } | |
1441 | ||
1442 | crtc_state->event->base.completion = &commit->flip_done; | |
1443 | } | |
1444 | ||
1445 | return 0; | |
1446 | } | |
1447 | EXPORT_SYMBOL(drm_atomic_helper_setup_commit); | |
1448 | ||
1449 | ||
1450 | static struct drm_crtc_commit *preceeding_commit(struct drm_crtc *crtc) | |
1451 | { | |
1452 | struct drm_crtc_commit *commit; | |
1453 | int i = 0; | |
1454 | ||
1455 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) { | |
1456 | /* skip the first entry, that's the current commit */ | |
1457 | if (i == 1) | |
1458 | return commit; | |
1459 | i++; | |
1460 | } | |
1461 | ||
1462 | return NULL; | |
1463 | } | |
1464 | ||
1465 | /** | |
1466 | * drm_atomic_helper_wait_for_dependencies - wait for required preceeding commits | |
1467 | * @state: new modeset state to be committed | |
1468 | * | |
1469 | * This function waits for all preceeding commits that touch the same CRTC as | |
1470 | * @state to both be committed to the hardware (as signalled by | |
1471 | * drm_atomic_helper_commit_hw_done) and executed by the hardware (as signalled | |
1472 | * by calling drm_crtc_vblank_send_event on the event member of | |
1473 | * &drm_crtc_state). | |
1474 | * | |
1475 | * This is part of the atomic helper support for nonblocking commits, see | |
1476 | * drm_atomic_helper_setup_commit() for an overview. | |
1477 | */ | |
1478 | void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *state) | |
1479 | { | |
1480 | struct drm_crtc *crtc; | |
1481 | struct drm_crtc_state *crtc_state; | |
1482 | struct drm_crtc_commit *commit; | |
1483 | int i; | |
1484 | long ret; | |
1485 | ||
1486 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1487 | spin_lock(&crtc->commit_lock); | |
1488 | commit = preceeding_commit(crtc); | |
1489 | if (commit) | |
1490 | drm_crtc_commit_get(commit); | |
1491 | spin_unlock(&crtc->commit_lock); | |
1492 | ||
1493 | if (!commit) | |
1494 | continue; | |
1495 | ||
1496 | ret = wait_for_completion_timeout(&commit->hw_done, | |
1497 | 10*HZ); | |
1498 | if (ret == 0) | |
1499 | DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n", | |
1500 | crtc->base.id, crtc->name); | |
1501 | ||
1502 | /* Currently no support for overwriting flips, hence | |
1503 | * stall for previous one to execute completely. */ | |
1504 | ret = wait_for_completion_timeout(&commit->flip_done, | |
1505 | 10*HZ); | |
1506 | if (ret == 0) | |
1507 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
1508 | crtc->base.id, crtc->name); | |
1509 | ||
1510 | drm_crtc_commit_put(commit); | |
1511 | } | |
1512 | } | |
1513 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies); | |
1514 | ||
1515 | /** | |
1516 | * drm_atomic_helper_commit_hw_done - setup possible nonblocking commit | |
1517 | * @state: new modeset state to be committed | |
1518 | * | |
1519 | * This function is used to signal completion of the hardware commit step. After | |
1520 | * this step the driver is not allowed to read or change any permanent software | |
1521 | * or hardware modeset state. The only exception is state protected by other | |
1522 | * means than &drm_modeset_lock locks. | |
1523 | * | |
1524 | * Drivers should try to postpone any expensive or delayed cleanup work after | |
1525 | * this function is called. | |
1526 | * | |
1527 | * This is part of the atomic helper support for nonblocking commits, see | |
1528 | * drm_atomic_helper_setup_commit() for an overview. | |
1529 | */ | |
1530 | void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *state) | |
1531 | { | |
1532 | struct drm_crtc *crtc; | |
1533 | struct drm_crtc_state *crtc_state; | |
1534 | struct drm_crtc_commit *commit; | |
1535 | int i; | |
1536 | ||
1537 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1538 | commit = state->crtcs[i].commit; | |
1539 | if (!commit) | |
1540 | continue; | |
1541 | ||
1542 | /* backend must have consumed any event by now */ | |
1543 | WARN_ON(crtc->state->event); | |
1544 | spin_lock(&crtc->commit_lock); | |
1545 | complete_all(&commit->hw_done); | |
1546 | spin_unlock(&crtc->commit_lock); | |
1547 | } | |
1548 | } | |
1549 | EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done); | |
1550 | ||
1551 | /** | |
1552 | * drm_atomic_helper_commit_cleanup_done - signal completion of commit | |
1553 | * @state: new modeset state to be committed | |
1554 | * | |
1555 | * This signals completion of the atomic update @state, including any cleanup | |
1556 | * work. If used, it must be called right before calling | |
1557 | * drm_atomic_state_free(). | |
1558 | * | |
1559 | * This is part of the atomic helper support for nonblocking commits, see | |
1560 | * drm_atomic_helper_setup_commit() for an overview. | |
1561 | */ | |
1562 | void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *state) | |
1563 | { | |
1564 | struct drm_crtc *crtc; | |
1565 | struct drm_crtc_state *crtc_state; | |
1566 | struct drm_crtc_commit *commit; | |
1567 | int i; | |
1568 | long ret; | |
1569 | ||
1570 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1571 | commit = state->crtcs[i].commit; | |
1572 | if (WARN_ON(!commit)) | |
1573 | continue; | |
1574 | ||
1575 | spin_lock(&crtc->commit_lock); | |
1576 | complete_all(&commit->cleanup_done); | |
1577 | WARN_ON(!try_wait_for_completion(&commit->hw_done)); | |
1578 | ||
1579 | /* commit_list borrows our reference, need to remove before we | |
1580 | * clean up our drm_atomic_state. But only after it actually | |
1581 | * completed, otherwise subsequent commits won't stall properly. */ | |
7deef7f1 DV |
1582 | if (try_wait_for_completion(&commit->flip_done)) |
1583 | goto del_commit; | |
a095caa7 DV |
1584 | |
1585 | spin_unlock(&crtc->commit_lock); | |
1586 | ||
1587 | /* We must wait for the vblank event to signal our completion | |
1588 | * before releasing our reference, since the vblank work does | |
1589 | * not hold a reference of its own. */ | |
1590 | ret = wait_for_completion_timeout(&commit->flip_done, | |
1591 | 10*HZ); | |
1592 | if (ret == 0) | |
1593 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
1594 | crtc->base.id, crtc->name); | |
1595 | ||
1596 | spin_lock(&crtc->commit_lock); | |
7deef7f1 | 1597 | del_commit: |
a095caa7 DV |
1598 | list_del(&commit->commit_entry); |
1599 | spin_unlock(&crtc->commit_lock); | |
1600 | } | |
1601 | } | |
1602 | EXPORT_SYMBOL(drm_atomic_helper_commit_cleanup_done); | |
1603 | ||
c2fcd274 | 1604 | /** |
2e3afd47 | 1605 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 1606 | * @dev: DRM device |
2e3afd47 | 1607 | * @state: atomic state object with new state structures |
c2fcd274 DV |
1608 | * |
1609 | * This function prepares plane state, specifically framebuffers, for the new | |
1610 | * configuration. If any failure is encountered this function will call | |
1611 | * ->cleanup_fb on any already successfully prepared framebuffer. | |
1612 | * | |
1613 | * Returns: | |
1614 | * 0 on success, negative error code on failure. | |
1615 | */ | |
1616 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
1617 | struct drm_atomic_state *state) | |
1618 | { | |
be9174a4 DV |
1619 | struct drm_plane *plane; |
1620 | struct drm_plane_state *plane_state; | |
1621 | int ret, i, j; | |
c2fcd274 | 1622 | |
be9174a4 | 1623 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 1624 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
1625 | |
1626 | funcs = plane->helper_private; | |
1627 | ||
844f9111 ML |
1628 | if (funcs->prepare_fb) { |
1629 | ret = funcs->prepare_fb(plane, plane_state); | |
c2fcd274 DV |
1630 | if (ret) |
1631 | goto fail; | |
1632 | } | |
1633 | } | |
1634 | ||
1635 | return 0; | |
1636 | ||
1637 | fail: | |
be9174a4 | 1638 | for_each_plane_in_state(state, plane, plane_state, j) { |
b5ceff20 | 1639 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1640 | |
be9174a4 | 1641 | if (j >= i) |
c2fcd274 DV |
1642 | continue; |
1643 | ||
1644 | funcs = plane->helper_private; | |
1645 | ||
844f9111 ML |
1646 | if (funcs->cleanup_fb) |
1647 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1648 | |
1649 | } | |
1650 | ||
1651 | return ret; | |
1652 | } | |
1653 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
1654 | ||
aef9dbb8 DV |
1655 | bool plane_crtc_active(struct drm_plane_state *state) |
1656 | { | |
1657 | return state->crtc && state->crtc->state->active; | |
1658 | } | |
1659 | ||
c2fcd274 DV |
1660 | /** |
1661 | * drm_atomic_helper_commit_planes - commit plane state | |
1662 | * @dev: DRM device | |
b0fcfc89 | 1663 | * @old_state: atomic state object with old state structures |
aef9dbb8 | 1664 | * @active_only: Only commit on active CRTC if set |
c2fcd274 DV |
1665 | * |
1666 | * This function commits the new plane state using the plane and atomic helper | |
1667 | * functions for planes and crtcs. It assumes that the atomic state has already | |
1668 | * been pushed into the relevant object state pointers, since this step can no | |
1669 | * longer fail. | |
1670 | * | |
b0fcfc89 | 1671 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 | 1672 | * crtcs need to be updated though. |
de28d021 ML |
1673 | * |
1674 | * Note that this function does all plane updates across all CRTCs in one step. | |
1675 | * If the hardware can't support this approach look at | |
1676 | * drm_atomic_helper_commit_planes_on_crtc() instead. | |
6e48ae32 DV |
1677 | * |
1678 | * Plane parameters can be updated by applications while the associated CRTC is | |
1679 | * disabled. The DRM/KMS core will store the parameters in the plane state, | |
1680 | * which will be available to the driver when the CRTC is turned on. As a result | |
1681 | * most drivers don't need to be immediately notified of plane updates for a | |
1682 | * disabled CRTC. | |
1683 | * | |
1684 | * Unless otherwise needed, drivers are advised to set the @active_only | |
1685 | * parameters to true in order not to receive plane update notifications related | |
1686 | * to a disabled CRTC. This avoids the need to manually ignore plane updates in | |
1687 | * driver code when the driver and/or hardware can't or just don't need to deal | |
1688 | * with updates on disabled CRTCs, for example when supporting runtime PM. | |
1689 | * | |
1690 | * The drm_atomic_helper_commit() default implementation only sets @active_only | |
1691 | * to false to most closely match the behaviour of the legacy helpers. This should | |
1692 | * not be copied blindly by drivers. | |
c2fcd274 DV |
1693 | */ |
1694 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
aef9dbb8 DV |
1695 | struct drm_atomic_state *old_state, |
1696 | bool active_only) | |
c2fcd274 | 1697 | { |
df63b999 ACO |
1698 | struct drm_crtc *crtc; |
1699 | struct drm_crtc_state *old_crtc_state; | |
1700 | struct drm_plane *plane; | |
1701 | struct drm_plane_state *old_plane_state; | |
c2fcd274 DV |
1702 | int i; |
1703 | ||
df63b999 | 1704 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1705 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1706 | |
1707 | funcs = crtc->helper_private; | |
1708 | ||
1709 | if (!funcs || !funcs->atomic_begin) | |
1710 | continue; | |
1711 | ||
aef9dbb8 DV |
1712 | if (active_only && !crtc->state->active) |
1713 | continue; | |
1714 | ||
613d2b27 | 1715 | funcs->atomic_begin(crtc, old_crtc_state); |
c2fcd274 DV |
1716 | } |
1717 | ||
df63b999 | 1718 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
b5ceff20 | 1719 | const struct drm_plane_helper_funcs *funcs; |
216c59d6 | 1720 | bool disabling; |
c2fcd274 DV |
1721 | |
1722 | funcs = plane->helper_private; | |
1723 | ||
3cad4b68 | 1724 | if (!funcs) |
c2fcd274 DV |
1725 | continue; |
1726 | ||
216c59d6 LP |
1727 | disabling = drm_atomic_plane_disabling(plane, old_plane_state); |
1728 | ||
1729 | if (active_only) { | |
1730 | /* | |
1731 | * Skip planes related to inactive CRTCs. If the plane | |
1732 | * is enabled use the state of the current CRTC. If the | |
1733 | * plane is being disabled use the state of the old | |
1734 | * CRTC to avoid skipping planes being disabled on an | |
1735 | * active CRTC. | |
1736 | */ | |
1737 | if (!disabling && !plane_crtc_active(plane->state)) | |
1738 | continue; | |
1739 | if (disabling && !plane_crtc_active(old_plane_state)) | |
1740 | continue; | |
1741 | } | |
aef9dbb8 | 1742 | |
407b8bd9 TR |
1743 | /* |
1744 | * Special-case disabling the plane if drivers support it. | |
1745 | */ | |
216c59d6 | 1746 | if (disabling && funcs->atomic_disable) |
407b8bd9 | 1747 | funcs->atomic_disable(plane, old_plane_state); |
216c59d6 | 1748 | else if (plane->state->crtc || disabling) |
407b8bd9 | 1749 | funcs->atomic_update(plane, old_plane_state); |
c2fcd274 DV |
1750 | } |
1751 | ||
df63b999 | 1752 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1753 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1754 | |
1755 | funcs = crtc->helper_private; | |
1756 | ||
1757 | if (!funcs || !funcs->atomic_flush) | |
1758 | continue; | |
1759 | ||
aef9dbb8 DV |
1760 | if (active_only && !crtc->state->active) |
1761 | continue; | |
1762 | ||
613d2b27 | 1763 | funcs->atomic_flush(crtc, old_crtc_state); |
c2fcd274 DV |
1764 | } |
1765 | } | |
1766 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1767 | ||
de28d021 ML |
1768 | /** |
1769 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc | |
1770 | * @old_crtc_state: atomic state object with the old crtc state | |
1771 | * | |
1772 | * This function commits the new plane state using the plane and atomic helper | |
1773 | * functions for planes on the specific crtc. It assumes that the atomic state | |
1774 | * has already been pushed into the relevant object state pointers, since this | |
1775 | * step can no longer fail. | |
1776 | * | |
1777 | * This function is useful when plane updates should be done crtc-by-crtc | |
1778 | * instead of one global step like drm_atomic_helper_commit_planes() does. | |
1779 | * | |
1780 | * This function can only be savely used when planes are not allowed to move | |
1781 | * between different CRTCs because this function doesn't handle inter-CRTC | |
1782 | * depencies. Callers need to ensure that either no such depencies exist, | |
1783 | * resolve them through ordering of commit calls or through some other means. | |
1784 | */ | |
1785 | void | |
1786 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) | |
1787 | { | |
1788 | const struct drm_crtc_helper_funcs *crtc_funcs; | |
1789 | struct drm_crtc *crtc = old_crtc_state->crtc; | |
1790 | struct drm_atomic_state *old_state = old_crtc_state->state; | |
1791 | struct drm_plane *plane; | |
1792 | unsigned plane_mask; | |
1793 | ||
1794 | plane_mask = old_crtc_state->plane_mask; | |
1795 | plane_mask |= crtc->state->plane_mask; | |
1796 | ||
1797 | crtc_funcs = crtc->helper_private; | |
1798 | if (crtc_funcs && crtc_funcs->atomic_begin) | |
613d2b27 | 1799 | crtc_funcs->atomic_begin(crtc, old_crtc_state); |
de28d021 ML |
1800 | |
1801 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { | |
1802 | struct drm_plane_state *old_plane_state = | |
1803 | drm_atomic_get_existing_plane_state(old_state, plane); | |
1804 | const struct drm_plane_helper_funcs *plane_funcs; | |
1805 | ||
1806 | plane_funcs = plane->helper_private; | |
1807 | ||
1808 | if (!old_plane_state || !plane_funcs) | |
1809 | continue; | |
1810 | ||
1811 | WARN_ON(plane->state->crtc && plane->state->crtc != crtc); | |
1812 | ||
1813 | if (drm_atomic_plane_disabling(plane, old_plane_state) && | |
1814 | plane_funcs->atomic_disable) | |
1815 | plane_funcs->atomic_disable(plane, old_plane_state); | |
1816 | else if (plane->state->crtc || | |
1817 | drm_atomic_plane_disabling(plane, old_plane_state)) | |
1818 | plane_funcs->atomic_update(plane, old_plane_state); | |
1819 | } | |
1820 | ||
1821 | if (crtc_funcs && crtc_funcs->atomic_flush) | |
613d2b27 | 1822 | crtc_funcs->atomic_flush(crtc, old_crtc_state); |
de28d021 ML |
1823 | } |
1824 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); | |
1825 | ||
6753ba97 JS |
1826 | /** |
1827 | * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes | |
1828 | * @crtc: CRTC | |
1829 | * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks | |
1830 | * | |
1831 | * Disables all planes associated with the given CRTC. This can be | |
1832 | * used for instance in the CRTC helper disable callback to disable | |
1833 | * all planes before shutting down the display pipeline. | |
1834 | * | |
1835 | * If the atomic-parameter is set the function calls the CRTC's | |
1836 | * atomic_begin hook before and atomic_flush hook after disabling the | |
1837 | * planes. | |
1838 | * | |
1839 | * It is a bug to call this function without having implemented the | |
1840 | * ->atomic_disable() plane hook. | |
1841 | */ | |
1842 | void drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc *crtc, | |
1843 | bool atomic) | |
1844 | { | |
1845 | const struct drm_crtc_helper_funcs *crtc_funcs = | |
1846 | crtc->helper_private; | |
1847 | struct drm_plane *plane; | |
1848 | ||
1849 | if (atomic && crtc_funcs && crtc_funcs->atomic_begin) | |
1850 | crtc_funcs->atomic_begin(crtc, NULL); | |
1851 | ||
1852 | drm_for_each_plane(plane, crtc->dev) { | |
1853 | const struct drm_plane_helper_funcs *plane_funcs = | |
1854 | plane->helper_private; | |
1855 | ||
1856 | if (plane->state->crtc != crtc || !plane_funcs) | |
1857 | continue; | |
1858 | ||
1859 | WARN_ON(!plane_funcs->atomic_disable); | |
1860 | if (plane_funcs->atomic_disable) | |
1861 | plane_funcs->atomic_disable(plane, NULL); | |
1862 | } | |
1863 | ||
1864 | if (atomic && crtc_funcs && crtc_funcs->atomic_flush) | |
1865 | crtc_funcs->atomic_flush(crtc, NULL); | |
1866 | } | |
1867 | EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); | |
1868 | ||
c2fcd274 DV |
1869 | /** |
1870 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1871 | * @dev: DRM device | |
1872 | * @old_state: atomic state object with old state structures | |
1873 | * | |
1874 | * This function cleans up plane state, specifically framebuffers, from the old | |
1875 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1876 | * be able to call this function. | |
1877 | * | |
1878 | * This function must also be called on the new state when the atomic update | |
1879 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1880 | */ | |
1881 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1882 | struct drm_atomic_state *old_state) | |
1883 | { | |
df63b999 ACO |
1884 | struct drm_plane *plane; |
1885 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
1886 | int i; |
1887 | ||
df63b999 | 1888 | for_each_plane_in_state(old_state, plane, plane_state, i) { |
b5ceff20 | 1889 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1890 | |
c2fcd274 DV |
1891 | funcs = plane->helper_private; |
1892 | ||
844f9111 ML |
1893 | if (funcs->cleanup_fb) |
1894 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1895 | } |
1896 | } | |
1897 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1898 | ||
1899 | /** | |
1900 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
c2fcd274 | 1901 | * @state: atomic state |
5e84c269 | 1902 | * @stall: stall for proceeding commits |
c2fcd274 DV |
1903 | * |
1904 | * This function stores the atomic state into the current state pointers in all | |
1905 | * driver objects. It should be called after all failing steps have been done | |
1906 | * and succeeded, but before the actual hardware state is committed. | |
1907 | * | |
1908 | * For cleanup and error recovery the current state for all changed objects will | |
1909 | * be swaped into @state. | |
1910 | * | |
1911 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1912 | * | |
1913 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1914 | * | |
1915 | * 2. Do any other steps that might fail. | |
1916 | * | |
1917 | * 3. Put the staged state into the current state pointers with this function. | |
1918 | * | |
1919 | * 4. Actually commit the hardware state. | |
1920 | * | |
26196f7e | 1921 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
c2fcd274 | 1922 | * contains the old state. Also do any other cleanup required with that state. |
a095caa7 DV |
1923 | * |
1924 | * @stall must be set when nonblocking commits for this driver directly access | |
1925 | * the ->state pointer of &drm_plane, &drm_crtc or &drm_connector. With the | |
1926 | * current atomic helpers this is almost always the case, since the helpers | |
1927 | * don't pass the right state structures to the callbacks. | |
c2fcd274 | 1928 | */ |
5e84c269 DV |
1929 | void drm_atomic_helper_swap_state(struct drm_atomic_state *state, |
1930 | bool stall) | |
c2fcd274 DV |
1931 | { |
1932 | int i; | |
a095caa7 | 1933 | long ret; |
be9174a4 DV |
1934 | struct drm_connector *connector; |
1935 | struct drm_connector_state *conn_state; | |
1936 | struct drm_crtc *crtc; | |
1937 | struct drm_crtc_state *crtc_state; | |
1938 | struct drm_plane *plane; | |
1939 | struct drm_plane_state *plane_state; | |
a095caa7 DV |
1940 | struct drm_crtc_commit *commit; |
1941 | ||
1942 | if (stall) { | |
1943 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1944 | spin_lock(&crtc->commit_lock); | |
1945 | commit = list_first_entry_or_null(&crtc->commit_list, | |
1946 | struct drm_crtc_commit, commit_entry); | |
1947 | if (commit) | |
1948 | drm_crtc_commit_get(commit); | |
1949 | spin_unlock(&crtc->commit_lock); | |
1950 | ||
1951 | if (!commit) | |
1952 | continue; | |
1953 | ||
1954 | ret = wait_for_completion_timeout(&commit->hw_done, | |
1955 | 10*HZ); | |
1956 | if (ret == 0) | |
1957 | DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n", | |
1958 | crtc->base.id, crtc->name); | |
1959 | drm_crtc_commit_put(commit); | |
1960 | } | |
1961 | } | |
c2fcd274 | 1962 | |
be9174a4 | 1963 | for_each_connector_in_state(state, connector, conn_state, i) { |
c2fcd274 | 1964 | connector->state->state = state; |
63e83c1d | 1965 | swap(state->connectors[i].state, connector->state); |
c2fcd274 DV |
1966 | connector->state->state = NULL; |
1967 | } | |
1968 | ||
be9174a4 | 1969 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
c2fcd274 | 1970 | crtc->state->state = state; |
5d943aa6 | 1971 | swap(state->crtcs[i].state, crtc->state); |
c2fcd274 | 1972 | crtc->state->state = NULL; |
a095caa7 DV |
1973 | |
1974 | if (state->crtcs[i].commit) { | |
1975 | spin_lock(&crtc->commit_lock); | |
1976 | list_add(&state->crtcs[i].commit->commit_entry, | |
1977 | &crtc->commit_list); | |
1978 | spin_unlock(&crtc->commit_lock); | |
1979 | ||
1980 | state->crtcs[i].commit->event = NULL; | |
1981 | } | |
c2fcd274 DV |
1982 | } |
1983 | ||
be9174a4 | 1984 | for_each_plane_in_state(state, plane, plane_state, i) { |
c2fcd274 | 1985 | plane->state->state = state; |
b8b5342b | 1986 | swap(state->planes[i].state, plane->state); |
c2fcd274 DV |
1987 | plane->state->state = NULL; |
1988 | } | |
1989 | } | |
1990 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
1991 | |
1992 | /** | |
1993 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
1994 | * @plane: plane object to update | |
1995 | * @crtc: owning CRTC of owning plane | |
1996 | * @fb: framebuffer to flip onto plane | |
1997 | * @crtc_x: x offset of primary plane on crtc | |
1998 | * @crtc_y: y offset of primary plane on crtc | |
1999 | * @crtc_w: width of primary plane rectangle on crtc | |
2000 | * @crtc_h: height of primary plane rectangle on crtc | |
2001 | * @src_x: x offset of @fb for panning | |
2002 | * @src_y: y offset of @fb for panning | |
2003 | * @src_w: width of source rectangle in @fb | |
2004 | * @src_h: height of source rectangle in @fb | |
2005 | * | |
2006 | * Provides a default plane update handler using the atomic driver interface. | |
2007 | * | |
2008 | * RETURNS: | |
2009 | * Zero on success, error code on failure | |
2010 | */ | |
2011 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
2012 | struct drm_crtc *crtc, | |
2013 | struct drm_framebuffer *fb, | |
2014 | int crtc_x, int crtc_y, | |
2015 | unsigned int crtc_w, unsigned int crtc_h, | |
2016 | uint32_t src_x, uint32_t src_y, | |
2017 | uint32_t src_w, uint32_t src_h) | |
2018 | { | |
2019 | struct drm_atomic_state *state; | |
2020 | struct drm_plane_state *plane_state; | |
2021 | int ret = 0; | |
2022 | ||
2023 | state = drm_atomic_state_alloc(plane->dev); | |
2024 | if (!state) | |
2025 | return -ENOMEM; | |
2026 | ||
2027 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2028 | retry: | |
2029 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2030 | if (IS_ERR(plane_state)) { | |
2031 | ret = PTR_ERR(plane_state); | |
2032 | goto fail; | |
2033 | } | |
2034 | ||
07cc0ef6 | 2035 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
2036 | if (ret != 0) |
2037 | goto fail; | |
321ebf04 | 2038 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
2039 | plane_state->crtc_x = crtc_x; |
2040 | plane_state->crtc_y = crtc_y; | |
042652ed | 2041 | plane_state->crtc_w = crtc_w; |
02e6f379 | 2042 | plane_state->crtc_h = crtc_h; |
042652ed DV |
2043 | plane_state->src_x = src_x; |
2044 | plane_state->src_y = src_y; | |
042652ed | 2045 | plane_state->src_w = src_w; |
02e6f379 | 2046 | plane_state->src_h = src_h; |
042652ed | 2047 | |
3671c580 DV |
2048 | if (plane == crtc->cursor) |
2049 | state->legacy_cursor_update = true; | |
2050 | ||
042652ed DV |
2051 | ret = drm_atomic_commit(state); |
2052 | if (ret != 0) | |
2053 | goto fail; | |
2054 | ||
2055 | /* Driver takes ownership of state on successful commit. */ | |
2056 | return 0; | |
2057 | fail: | |
2058 | if (ret == -EDEADLK) | |
2059 | goto backoff; | |
2060 | ||
2061 | drm_atomic_state_free(state); | |
2062 | ||
2063 | return ret; | |
2064 | backoff: | |
042652ed | 2065 | drm_atomic_state_clear(state); |
6f75cea6 | 2066 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2067 | |
2068 | /* | |
2069 | * Someone might have exchanged the framebuffer while we dropped locks | |
2070 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2071 | * core does for us. | |
2072 | */ | |
2073 | plane->old_fb = plane->fb; | |
2074 | ||
2075 | goto retry; | |
2076 | } | |
2077 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
2078 | ||
2079 | /** | |
2080 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
2081 | * @plane: plane to disable | |
2082 | * | |
2083 | * Provides a default plane disable handler using the atomic driver interface. | |
2084 | * | |
2085 | * RETURNS: | |
2086 | * Zero on success, error code on failure | |
2087 | */ | |
2088 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
2089 | { | |
2090 | struct drm_atomic_state *state; | |
2091 | struct drm_plane_state *plane_state; | |
2092 | int ret = 0; | |
2093 | ||
aa54e2ee JSP |
2094 | /* |
2095 | * FIXME: Without plane->crtc set we can't get at the implicit legacy | |
2096 | * acquire context. The real fix will be to wire the acquire ctx through | |
2097 | * everywhere we need it, but meanwhile prevent chaos by just skipping | |
2098 | * this noop. The critical case is the cursor ioctls which a) only grab | |
2099 | * crtc/cursor-plane locks (so we need the crtc to get at the right | |
2100 | * acquire context) and b) can try to disable the plane multiple times. | |
2101 | */ | |
2102 | if (!plane->crtc) | |
2103 | return 0; | |
2104 | ||
042652ed DV |
2105 | state = drm_atomic_state_alloc(plane->dev); |
2106 | if (!state) | |
2107 | return -ENOMEM; | |
2108 | ||
2109 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
2110 | retry: | |
2111 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2112 | if (IS_ERR(plane_state)) { | |
2113 | ret = PTR_ERR(plane_state); | |
2114 | goto fail; | |
2115 | } | |
2116 | ||
24e79d0d ML |
2117 | if (plane_state->crtc && (plane == plane->crtc->cursor)) |
2118 | plane_state->state->legacy_cursor_update = true; | |
2119 | ||
bbb1e524 | 2120 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
042652ed DV |
2121 | if (ret != 0) |
2122 | goto fail; | |
f02ad907 | 2123 | |
042652ed DV |
2124 | ret = drm_atomic_commit(state); |
2125 | if (ret != 0) | |
2126 | goto fail; | |
2127 | ||
2128 | /* Driver takes ownership of state on successful commit. */ | |
2129 | return 0; | |
2130 | fail: | |
2131 | if (ret == -EDEADLK) | |
2132 | goto backoff; | |
2133 | ||
2134 | drm_atomic_state_free(state); | |
2135 | ||
2136 | return ret; | |
2137 | backoff: | |
042652ed | 2138 | drm_atomic_state_clear(state); |
6f75cea6 | 2139 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2140 | |
2141 | /* | |
2142 | * Someone might have exchanged the framebuffer while we dropped locks | |
2143 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2144 | * core does for us. | |
2145 | */ | |
2146 | plane->old_fb = plane->fb; | |
2147 | ||
2148 | goto retry; | |
2149 | } | |
2150 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
2151 | ||
bbb1e524 RC |
2152 | /* just used from fb-helper and atomic-helper: */ |
2153 | int __drm_atomic_helper_disable_plane(struct drm_plane *plane, | |
2154 | struct drm_plane_state *plane_state) | |
2155 | { | |
2156 | int ret; | |
2157 | ||
2158 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
2159 | if (ret != 0) | |
2160 | return ret; | |
2161 | ||
2162 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
2163 | plane_state->crtc_x = 0; | |
2164 | plane_state->crtc_y = 0; | |
bbb1e524 | 2165 | plane_state->crtc_w = 0; |
02e6f379 | 2166 | plane_state->crtc_h = 0; |
bbb1e524 RC |
2167 | plane_state->src_x = 0; |
2168 | plane_state->src_y = 0; | |
bbb1e524 | 2169 | plane_state->src_w = 0; |
02e6f379 | 2170 | plane_state->src_h = 0; |
bbb1e524 | 2171 | |
bbb1e524 RC |
2172 | return 0; |
2173 | } | |
2174 | ||
042652ed DV |
2175 | static int update_output_state(struct drm_atomic_state *state, |
2176 | struct drm_mode_set *set) | |
2177 | { | |
2178 | struct drm_device *dev = set->crtc->dev; | |
df63b999 ACO |
2179 | struct drm_crtc *crtc; |
2180 | struct drm_crtc_state *crtc_state; | |
2181 | struct drm_connector *connector; | |
042652ed | 2182 | struct drm_connector_state *conn_state; |
6ab520a2 | 2183 | int ret, i; |
042652ed DV |
2184 | |
2185 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
2186 | state->acquire_ctx); | |
2187 | if (ret) | |
2188 | return ret; | |
2189 | ||
6ab520a2 ML |
2190 | /* First disable all connectors on the target crtc. */ |
2191 | ret = drm_atomic_add_affected_connectors(state, set->crtc); | |
2192 | if (ret) | |
2193 | return ret; | |
042652ed | 2194 | |
df63b999 | 2195 | for_each_connector_in_state(state, connector, conn_state, i) { |
042652ed DV |
2196 | if (conn_state->crtc == set->crtc) { |
2197 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
2198 | NULL); | |
2199 | if (ret) | |
2200 | return ret; | |
2201 | } | |
6ab520a2 | 2202 | } |
042652ed | 2203 | |
6ab520a2 ML |
2204 | /* Then set all connectors from set->connectors on the target crtc */ |
2205 | for (i = 0; i < set->num_connectors; i++) { | |
2206 | conn_state = drm_atomic_get_connector_state(state, | |
2207 | set->connectors[i]); | |
2208 | if (IS_ERR(conn_state)) | |
2209 | return PTR_ERR(conn_state); | |
2210 | ||
2211 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
2212 | set->crtc); | |
2213 | if (ret) | |
2214 | return ret; | |
042652ed DV |
2215 | } |
2216 | ||
df63b999 | 2217 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
2218 | /* Don't update ->enable for the CRTC in the set_config request, |
2219 | * since a mismatch would indicate a bug in the upper layers. | |
2220 | * The actual modeset code later on will catch any | |
2221 | * inconsistencies here. */ | |
2222 | if (crtc == set->crtc) | |
2223 | continue; | |
2224 | ||
14de6c44 | 2225 | if (!crtc_state->connector_mask) { |
c30f55a7 LP |
2226 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, |
2227 | NULL); | |
2228 | if (ret < 0) | |
2229 | return ret; | |
2230 | ||
9b5edbf7 | 2231 | crtc_state->active = false; |
c30f55a7 | 2232 | } |
042652ed DV |
2233 | } |
2234 | ||
2235 | return 0; | |
2236 | } | |
2237 | ||
2238 | /** | |
2239 | * drm_atomic_helper_set_config - set a new config from userspace | |
2240 | * @set: mode set configuration | |
2241 | * | |
2242 | * Provides a default crtc set_config handler using the atomic driver interface. | |
2243 | * | |
2244 | * Returns: | |
2245 | * Returns 0 on success, negative errno numbers on failure. | |
2246 | */ | |
2247 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
2248 | { | |
2249 | struct drm_atomic_state *state; | |
2250 | struct drm_crtc *crtc = set->crtc; | |
042652ed DV |
2251 | int ret = 0; |
2252 | ||
2253 | state = drm_atomic_state_alloc(crtc->dev); | |
2254 | if (!state) | |
2255 | return -ENOMEM; | |
2256 | ||
40616a26 | 2257 | state->legacy_set_config = true; |
042652ed DV |
2258 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); |
2259 | retry: | |
bbb1e524 RC |
2260 | ret = __drm_atomic_helper_set_config(set, state); |
2261 | if (ret != 0) | |
042652ed | 2262 | goto fail; |
042652ed | 2263 | |
bbb1e524 RC |
2264 | ret = drm_atomic_commit(state); |
2265 | if (ret != 0) | |
e5b5341c | 2266 | goto fail; |
bbb1e524 RC |
2267 | |
2268 | /* Driver takes ownership of state on successful commit. */ | |
2269 | return 0; | |
2270 | fail: | |
2271 | if (ret == -EDEADLK) | |
2272 | goto backoff; | |
2273 | ||
2274 | drm_atomic_state_free(state); | |
2275 | ||
2276 | return ret; | |
2277 | backoff: | |
2278 | drm_atomic_state_clear(state); | |
2279 | drm_atomic_legacy_backoff(state); | |
2280 | ||
2281 | /* | |
2282 | * Someone might have exchanged the framebuffer while we dropped locks | |
2283 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2284 | * core does for us. | |
2285 | */ | |
2286 | crtc->primary->old_fb = crtc->primary->fb; | |
2287 | ||
2288 | goto retry; | |
2289 | } | |
2290 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
2291 | ||
2292 | /* just used from fb-helper and atomic-helper: */ | |
2293 | int __drm_atomic_helper_set_config(struct drm_mode_set *set, | |
2294 | struct drm_atomic_state *state) | |
2295 | { | |
2296 | struct drm_crtc_state *crtc_state; | |
2297 | struct drm_plane_state *primary_state; | |
2298 | struct drm_crtc *crtc = set->crtc; | |
83926117 | 2299 | int hdisplay, vdisplay; |
bbb1e524 RC |
2300 | int ret; |
2301 | ||
2302 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2303 | if (IS_ERR(crtc_state)) | |
2304 | return PTR_ERR(crtc_state); | |
2305 | ||
2306 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); | |
2307 | if (IS_ERR(primary_state)) | |
2308 | return PTR_ERR(primary_state); | |
e5b5341c | 2309 | |
042652ed DV |
2310 | if (!set->mode) { |
2311 | WARN_ON(set->fb); | |
2312 | WARN_ON(set->num_connectors); | |
2313 | ||
819364da DS |
2314 | ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); |
2315 | if (ret != 0) | |
bbb1e524 | 2316 | return ret; |
819364da | 2317 | |
eab3bbef | 2318 | crtc_state->active = false; |
e5b5341c | 2319 | |
07cc0ef6 | 2320 | ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
e5b5341c | 2321 | if (ret != 0) |
bbb1e524 | 2322 | return ret; |
e5b5341c RC |
2323 | |
2324 | drm_atomic_set_fb_for_plane(primary_state, NULL); | |
2325 | ||
042652ed DV |
2326 | goto commit; |
2327 | } | |
2328 | ||
2329 | WARN_ON(!set->fb); | |
2330 | WARN_ON(!set->num_connectors); | |
2331 | ||
819364da DS |
2332 | ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); |
2333 | if (ret != 0) | |
bbb1e524 | 2334 | return ret; |
819364da | 2335 | |
eab3bbef | 2336 | crtc_state->active = true; |
042652ed | 2337 | |
07cc0ef6 | 2338 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
042652ed | 2339 | if (ret != 0) |
bbb1e524 RC |
2340 | return ret; |
2341 | ||
83926117 VS |
2342 | drm_crtc_get_hv_timing(set->mode, &hdisplay, &vdisplay); |
2343 | ||
321ebf04 | 2344 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
042652ed DV |
2345 | primary_state->crtc_x = 0; |
2346 | primary_state->crtc_y = 0; | |
83926117 | 2347 | primary_state->crtc_w = hdisplay; |
02e6f379 | 2348 | primary_state->crtc_h = vdisplay; |
042652ed DV |
2349 | primary_state->src_x = set->x << 16; |
2350 | primary_state->src_y = set->y << 16; | |
41121248 | 2351 | if (primary_state->rotation & (BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270))) { |
83926117 | 2352 | primary_state->src_w = vdisplay << 16; |
02e6f379 | 2353 | primary_state->src_h = hdisplay << 16; |
41121248 | 2354 | } else { |
83926117 | 2355 | primary_state->src_w = hdisplay << 16; |
02e6f379 | 2356 | primary_state->src_h = vdisplay << 16; |
41121248 | 2357 | } |
042652ed DV |
2358 | |
2359 | commit: | |
2360 | ret = update_output_state(state, set); | |
2361 | if (ret) | |
bbb1e524 | 2362 | return ret; |
042652ed | 2363 | |
042652ed | 2364 | return 0; |
042652ed | 2365 | } |
042652ed | 2366 | |
14942760 TR |
2367 | /** |
2368 | * drm_atomic_helper_disable_all - disable all currently active outputs | |
2369 | * @dev: DRM device | |
2370 | * @ctx: lock acquisition context | |
2371 | * | |
2372 | * Loops through all connectors, finding those that aren't turned off and then | |
2373 | * turns them off by setting their DPMS mode to OFF and deactivating the CRTC | |
2374 | * that they are connected to. | |
2375 | * | |
2376 | * This is used for example in suspend/resume to disable all currently active | |
2377 | * functions when suspending. | |
2378 | * | |
2379 | * Note that if callers haven't already acquired all modeset locks this might | |
2380 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
2381 | * | |
2382 | * Returns: | |
2383 | * 0 on success or a negative error code on failure. | |
2384 | * | |
2385 | * See also: | |
2386 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
2387 | */ | |
2388 | int drm_atomic_helper_disable_all(struct drm_device *dev, | |
2389 | struct drm_modeset_acquire_ctx *ctx) | |
2390 | { | |
2391 | struct drm_atomic_state *state; | |
2392 | struct drm_connector *conn; | |
2393 | int err; | |
2394 | ||
2395 | state = drm_atomic_state_alloc(dev); | |
2396 | if (!state) | |
2397 | return -ENOMEM; | |
2398 | ||
2399 | state->acquire_ctx = ctx; | |
2400 | ||
2401 | drm_for_each_connector(conn, dev) { | |
2402 | struct drm_crtc *crtc = conn->state->crtc; | |
2403 | struct drm_crtc_state *crtc_state; | |
2404 | ||
2405 | if (!crtc || conn->dpms != DRM_MODE_DPMS_ON) | |
2406 | continue; | |
2407 | ||
2408 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2409 | if (IS_ERR(crtc_state)) { | |
2410 | err = PTR_ERR(crtc_state); | |
2411 | goto free; | |
2412 | } | |
2413 | ||
2414 | crtc_state->active = false; | |
2415 | } | |
2416 | ||
2417 | err = drm_atomic_commit(state); | |
2418 | ||
2419 | free: | |
2420 | if (err < 0) | |
2421 | drm_atomic_state_free(state); | |
2422 | ||
2423 | return err; | |
2424 | } | |
2425 | EXPORT_SYMBOL(drm_atomic_helper_disable_all); | |
2426 | ||
2427 | /** | |
2428 | * drm_atomic_helper_suspend - subsystem-level suspend helper | |
2429 | * @dev: DRM device | |
2430 | * | |
2431 | * Duplicates the current atomic state, disables all active outputs and then | |
2432 | * returns a pointer to the original atomic state to the caller. Drivers can | |
2433 | * pass this pointer to the drm_atomic_helper_resume() helper upon resume to | |
2434 | * restore the output configuration that was active at the time the system | |
2435 | * entered suspend. | |
2436 | * | |
2437 | * Note that it is potentially unsafe to use this. The atomic state object | |
2438 | * returned by this function is assumed to be persistent. Drivers must ensure | |
2439 | * that this holds true. Before calling this function, drivers must make sure | |
2440 | * to suspend fbdev emulation so that nothing can be using the device. | |
2441 | * | |
2442 | * Returns: | |
2443 | * A pointer to a copy of the state before suspend on success or an ERR_PTR()- | |
2444 | * encoded error code on failure. Drivers should store the returned atomic | |
2445 | * state object and pass it to the drm_atomic_helper_resume() helper upon | |
2446 | * resume. | |
2447 | * | |
2448 | * See also: | |
2449 | * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), | |
2450 | * drm_atomic_helper_resume() | |
2451 | */ | |
2452 | struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) | |
2453 | { | |
2454 | struct drm_modeset_acquire_ctx ctx; | |
2455 | struct drm_atomic_state *state; | |
2456 | int err; | |
2457 | ||
2458 | drm_modeset_acquire_init(&ctx, 0); | |
2459 | ||
2460 | retry: | |
2461 | err = drm_modeset_lock_all_ctx(dev, &ctx); | |
2462 | if (err < 0) { | |
2463 | state = ERR_PTR(err); | |
2464 | goto unlock; | |
2465 | } | |
2466 | ||
2467 | state = drm_atomic_helper_duplicate_state(dev, &ctx); | |
2468 | if (IS_ERR(state)) | |
2469 | goto unlock; | |
2470 | ||
2471 | err = drm_atomic_helper_disable_all(dev, &ctx); | |
2472 | if (err < 0) { | |
2473 | drm_atomic_state_free(state); | |
2474 | state = ERR_PTR(err); | |
2475 | goto unlock; | |
2476 | } | |
2477 | ||
2478 | unlock: | |
2479 | if (PTR_ERR(state) == -EDEADLK) { | |
2480 | drm_modeset_backoff(&ctx); | |
2481 | goto retry; | |
2482 | } | |
2483 | ||
2484 | drm_modeset_drop_locks(&ctx); | |
2485 | drm_modeset_acquire_fini(&ctx); | |
2486 | return state; | |
2487 | } | |
2488 | EXPORT_SYMBOL(drm_atomic_helper_suspend); | |
2489 | ||
2490 | /** | |
2491 | * drm_atomic_helper_resume - subsystem-level resume helper | |
2492 | * @dev: DRM device | |
2493 | * @state: atomic state to resume to | |
2494 | * | |
2495 | * Calls drm_mode_config_reset() to synchronize hardware and software states, | |
2496 | * grabs all modeset locks and commits the atomic state object. This can be | |
2497 | * used in conjunction with the drm_atomic_helper_suspend() helper to | |
2498 | * implement suspend/resume for drivers that support atomic mode-setting. | |
2499 | * | |
2500 | * Returns: | |
2501 | * 0 on success or a negative error code on failure. | |
2502 | * | |
2503 | * See also: | |
2504 | * drm_atomic_helper_suspend() | |
2505 | */ | |
2506 | int drm_atomic_helper_resume(struct drm_device *dev, | |
2507 | struct drm_atomic_state *state) | |
2508 | { | |
2509 | struct drm_mode_config *config = &dev->mode_config; | |
2510 | int err; | |
2511 | ||
2512 | drm_mode_config_reset(dev); | |
2513 | drm_modeset_lock_all(dev); | |
2514 | state->acquire_ctx = config->acquire_ctx; | |
2515 | err = drm_atomic_commit(state); | |
2516 | drm_modeset_unlock_all(dev); | |
2517 | ||
2518 | return err; | |
2519 | } | |
2520 | EXPORT_SYMBOL(drm_atomic_helper_resume); | |
2521 | ||
042652ed | 2522 | /** |
7f50002f | 2523 | * drm_atomic_helper_crtc_set_property - helper for crtc properties |
042652ed DV |
2524 | * @crtc: DRM crtc |
2525 | * @property: DRM property | |
2526 | * @val: value of property | |
2527 | * | |
7f50002f LP |
2528 | * Provides a default crtc set_property handler using the atomic driver |
2529 | * interface. | |
042652ed DV |
2530 | * |
2531 | * RETURNS: | |
2532 | * Zero on success, error code on failure | |
2533 | */ | |
2534 | int | |
2535 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
2536 | struct drm_property *property, | |
2537 | uint64_t val) | |
2538 | { | |
2539 | struct drm_atomic_state *state; | |
2540 | struct drm_crtc_state *crtc_state; | |
2541 | int ret = 0; | |
2542 | ||
2543 | state = drm_atomic_state_alloc(crtc->dev); | |
2544 | if (!state) | |
2545 | return -ENOMEM; | |
2546 | ||
2547 | /* ->set_property is always called with all locks held. */ | |
2548 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
2549 | retry: | |
2550 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2551 | if (IS_ERR(crtc_state)) { | |
2552 | ret = PTR_ERR(crtc_state); | |
2553 | goto fail; | |
2554 | } | |
2555 | ||
40ecc694 RC |
2556 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
2557 | property, val); | |
042652ed DV |
2558 | if (ret) |
2559 | goto fail; | |
2560 | ||
2561 | ret = drm_atomic_commit(state); | |
2562 | if (ret != 0) | |
2563 | goto fail; | |
2564 | ||
2565 | /* Driver takes ownership of state on successful commit. */ | |
2566 | return 0; | |
2567 | fail: | |
2568 | if (ret == -EDEADLK) | |
2569 | goto backoff; | |
2570 | ||
2571 | drm_atomic_state_free(state); | |
2572 | ||
2573 | return ret; | |
2574 | backoff: | |
042652ed | 2575 | drm_atomic_state_clear(state); |
6f75cea6 | 2576 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2577 | |
2578 | goto retry; | |
2579 | } | |
2580 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
2581 | ||
2582 | /** | |
7f50002f | 2583 | * drm_atomic_helper_plane_set_property - helper for plane properties |
042652ed DV |
2584 | * @plane: DRM plane |
2585 | * @property: DRM property | |
2586 | * @val: value of property | |
2587 | * | |
7f50002f LP |
2588 | * Provides a default plane set_property handler using the atomic driver |
2589 | * interface. | |
042652ed DV |
2590 | * |
2591 | * RETURNS: | |
2592 | * Zero on success, error code on failure | |
2593 | */ | |
2594 | int | |
2595 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
2596 | struct drm_property *property, | |
2597 | uint64_t val) | |
2598 | { | |
2599 | struct drm_atomic_state *state; | |
2600 | struct drm_plane_state *plane_state; | |
2601 | int ret = 0; | |
2602 | ||
2603 | state = drm_atomic_state_alloc(plane->dev); | |
2604 | if (!state) | |
2605 | return -ENOMEM; | |
2606 | ||
2607 | /* ->set_property is always called with all locks held. */ | |
2608 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
2609 | retry: | |
2610 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2611 | if (IS_ERR(plane_state)) { | |
2612 | ret = PTR_ERR(plane_state); | |
2613 | goto fail; | |
2614 | } | |
2615 | ||
40ecc694 RC |
2616 | ret = drm_atomic_plane_set_property(plane, plane_state, |
2617 | property, val); | |
042652ed DV |
2618 | if (ret) |
2619 | goto fail; | |
2620 | ||
2621 | ret = drm_atomic_commit(state); | |
2622 | if (ret != 0) | |
2623 | goto fail; | |
2624 | ||
2625 | /* Driver takes ownership of state on successful commit. */ | |
2626 | return 0; | |
2627 | fail: | |
2628 | if (ret == -EDEADLK) | |
2629 | goto backoff; | |
2630 | ||
2631 | drm_atomic_state_free(state); | |
2632 | ||
2633 | return ret; | |
2634 | backoff: | |
042652ed | 2635 | drm_atomic_state_clear(state); |
6f75cea6 | 2636 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2637 | |
2638 | goto retry; | |
2639 | } | |
2640 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
2641 | ||
2642 | /** | |
7f50002f | 2643 | * drm_atomic_helper_connector_set_property - helper for connector properties |
042652ed DV |
2644 | * @connector: DRM connector |
2645 | * @property: DRM property | |
2646 | * @val: value of property | |
2647 | * | |
7f50002f LP |
2648 | * Provides a default connector set_property handler using the atomic driver |
2649 | * interface. | |
042652ed DV |
2650 | * |
2651 | * RETURNS: | |
2652 | * Zero on success, error code on failure | |
2653 | */ | |
2654 | int | |
2655 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
2656 | struct drm_property *property, | |
2657 | uint64_t val) | |
2658 | { | |
2659 | struct drm_atomic_state *state; | |
2660 | struct drm_connector_state *connector_state; | |
2661 | int ret = 0; | |
2662 | ||
2663 | state = drm_atomic_state_alloc(connector->dev); | |
2664 | if (!state) | |
2665 | return -ENOMEM; | |
2666 | ||
2667 | /* ->set_property is always called with all locks held. */ | |
2668 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
2669 | retry: | |
2670 | connector_state = drm_atomic_get_connector_state(state, connector); | |
2671 | if (IS_ERR(connector_state)) { | |
2672 | ret = PTR_ERR(connector_state); | |
2673 | goto fail; | |
2674 | } | |
2675 | ||
40ecc694 RC |
2676 | ret = drm_atomic_connector_set_property(connector, connector_state, |
2677 | property, val); | |
042652ed DV |
2678 | if (ret) |
2679 | goto fail; | |
2680 | ||
2681 | ret = drm_atomic_commit(state); | |
2682 | if (ret != 0) | |
2683 | goto fail; | |
2684 | ||
2685 | /* Driver takes ownership of state on successful commit. */ | |
2686 | return 0; | |
2687 | fail: | |
2688 | if (ret == -EDEADLK) | |
2689 | goto backoff; | |
2690 | ||
2691 | drm_atomic_state_free(state); | |
2692 | ||
2693 | return ret; | |
2694 | backoff: | |
042652ed | 2695 | drm_atomic_state_clear(state); |
6f75cea6 | 2696 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2697 | |
2698 | goto retry; | |
2699 | } | |
2700 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 DV |
2701 | |
2702 | /** | |
2703 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
2704 | * @crtc: DRM crtc | |
2705 | * @fb: DRM framebuffer | |
2706 | * @event: optional DRM event to signal upon completion | |
2707 | * @flags: flip flags for non-vblank sync'ed updates | |
2708 | * | |
2709 | * Provides a default page flip implementation using the atomic driver interface. | |
2710 | * | |
2711 | * Note that for now so called async page flips (i.e. updates which are not | |
2712 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
2713 | * no provisions for this yet. | |
2714 | * | |
2715 | * Returns: | |
2716 | * Returns 0 on success, negative errno numbers on failure. | |
2717 | */ | |
2718 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
2719 | struct drm_framebuffer *fb, | |
2720 | struct drm_pending_vblank_event *event, | |
2721 | uint32_t flags) | |
2722 | { | |
2723 | struct drm_plane *plane = crtc->primary; | |
2724 | struct drm_atomic_state *state; | |
2725 | struct drm_plane_state *plane_state; | |
2726 | struct drm_crtc_state *crtc_state; | |
2727 | int ret = 0; | |
2728 | ||
2729 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
2730 | return -EINVAL; | |
2731 | ||
2732 | state = drm_atomic_state_alloc(plane->dev); | |
2733 | if (!state) | |
2734 | return -ENOMEM; | |
2735 | ||
2736 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2737 | retry: | |
2738 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2739 | if (IS_ERR(crtc_state)) { | |
2740 | ret = PTR_ERR(crtc_state); | |
2741 | goto fail; | |
2742 | } | |
2743 | crtc_state->event = event; | |
2744 | ||
2745 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2746 | if (IS_ERR(plane_state)) { | |
2747 | ret = PTR_ERR(plane_state); | |
2748 | goto fail; | |
2749 | } | |
2750 | ||
07cc0ef6 | 2751 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
8bc0f312 DV |
2752 | if (ret != 0) |
2753 | goto fail; | |
321ebf04 | 2754 | drm_atomic_set_fb_for_plane(plane_state, fb); |
8bc0f312 | 2755 | |
4cba6850 DV |
2756 | /* Make sure we don't accidentally do a full modeset. */ |
2757 | state->allow_modeset = false; | |
2758 | if (!crtc_state->active) { | |
2759 | DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n", | |
2760 | crtc->base.id); | |
2761 | ret = -EINVAL; | |
2762 | goto fail; | |
2763 | } | |
2764 | ||
b837ba0a | 2765 | ret = drm_atomic_nonblocking_commit(state); |
8bc0f312 DV |
2766 | if (ret != 0) |
2767 | goto fail; | |
2768 | ||
b837ba0a | 2769 | /* Driver takes ownership of state on successful commit. */ |
8bc0f312 DV |
2770 | return 0; |
2771 | fail: | |
2772 | if (ret == -EDEADLK) | |
2773 | goto backoff; | |
2774 | ||
2775 | drm_atomic_state_free(state); | |
2776 | ||
2777 | return ret; | |
2778 | backoff: | |
8bc0f312 | 2779 | drm_atomic_state_clear(state); |
6f75cea6 | 2780 | drm_atomic_legacy_backoff(state); |
8bc0f312 DV |
2781 | |
2782 | /* | |
2783 | * Someone might have exchanged the framebuffer while we dropped locks | |
2784 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2785 | * core does for us. | |
2786 | */ | |
2787 | plane->old_fb = plane->fb; | |
2788 | ||
2789 | goto retry; | |
2790 | } | |
2791 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
d461701c | 2792 | |
b486e0e6 DV |
2793 | /** |
2794 | * drm_atomic_helper_connector_dpms() - connector dpms helper implementation | |
2795 | * @connector: affected connector | |
2796 | * @mode: DPMS mode | |
2797 | * | |
2798 | * This is the main helper function provided by the atomic helper framework for | |
2799 | * implementing the legacy DPMS connector interface. It computes the new desired | |
2800 | * ->active state for the corresponding CRTC (if the connector is enabled) and | |
2e7a5701 | 2801 | * updates it. |
9a69a9ac ML |
2802 | * |
2803 | * Returns: | |
2804 | * Returns 0 on success, negative errno numbers on failure. | |
b486e0e6 | 2805 | */ |
9a69a9ac ML |
2806 | int drm_atomic_helper_connector_dpms(struct drm_connector *connector, |
2807 | int mode) | |
b486e0e6 DV |
2808 | { |
2809 | struct drm_mode_config *config = &connector->dev->mode_config; | |
2810 | struct drm_atomic_state *state; | |
2811 | struct drm_crtc_state *crtc_state; | |
2812 | struct drm_crtc *crtc; | |
2813 | struct drm_connector *tmp_connector; | |
2814 | int ret; | |
2815 | bool active = false; | |
9a69a9ac | 2816 | int old_mode = connector->dpms; |
b486e0e6 DV |
2817 | |
2818 | if (mode != DRM_MODE_DPMS_ON) | |
2819 | mode = DRM_MODE_DPMS_OFF; | |
2820 | ||
2821 | connector->dpms = mode; | |
2822 | crtc = connector->state->crtc; | |
2823 | ||
2824 | if (!crtc) | |
9a69a9ac | 2825 | return 0; |
b486e0e6 | 2826 | |
b486e0e6 DV |
2827 | state = drm_atomic_state_alloc(connector->dev); |
2828 | if (!state) | |
9a69a9ac | 2829 | return -ENOMEM; |
b486e0e6 DV |
2830 | |
2831 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2832 | retry: | |
2833 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
9a69a9ac ML |
2834 | if (IS_ERR(crtc_state)) { |
2835 | ret = PTR_ERR(crtc_state); | |
2836 | goto fail; | |
2837 | } | |
b486e0e6 DV |
2838 | |
2839 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
2840 | ||
9a9f5ce8 | 2841 | drm_for_each_connector(tmp_connector, connector->dev) { |
0388df05 | 2842 | if (tmp_connector->state->crtc != crtc) |
b486e0e6 DV |
2843 | continue; |
2844 | ||
0388df05 | 2845 | if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { |
b486e0e6 DV |
2846 | active = true; |
2847 | break; | |
2848 | } | |
2849 | } | |
2850 | crtc_state->active = active; | |
2851 | ||
2852 | ret = drm_atomic_commit(state); | |
2853 | if (ret != 0) | |
2854 | goto fail; | |
2855 | ||
9a69a9ac ML |
2856 | /* Driver takes ownership of state on successful commit. */ |
2857 | return 0; | |
b486e0e6 DV |
2858 | fail: |
2859 | if (ret == -EDEADLK) | |
2860 | goto backoff; | |
2861 | ||
9a69a9ac | 2862 | connector->dpms = old_mode; |
b486e0e6 DV |
2863 | drm_atomic_state_free(state); |
2864 | ||
9a69a9ac | 2865 | return ret; |
b486e0e6 DV |
2866 | backoff: |
2867 | drm_atomic_state_clear(state); | |
2868 | drm_atomic_legacy_backoff(state); | |
2869 | ||
2870 | goto retry; | |
2871 | } | |
2872 | EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); | |
2873 | ||
9ecb5498 NT |
2874 | /** |
2875 | * drm_atomic_helper_best_encoder - Helper for &drm_connector_helper_funcs | |
2876 | * ->best_encoder callback | |
2877 | * @connector: Connector control structure | |
2878 | * | |
2879 | * This is a &drm_connector_helper_funcs ->best_encoder callback helper for | |
2880 | * connectors that support exactly 1 encoder, statically determined at driver | |
2881 | * init time. | |
2882 | */ | |
2883 | struct drm_encoder * | |
2884 | drm_atomic_helper_best_encoder(struct drm_connector *connector) | |
2885 | { | |
2886 | WARN_ON(connector->encoder_ids[1]); | |
2887 | return drm_encoder_find(connector->dev, connector->encoder_ids[0]); | |
2888 | } | |
2889 | EXPORT_SYMBOL(drm_atomic_helper_best_encoder); | |
2890 | ||
3150c7d0 DV |
2891 | /** |
2892 | * DOC: atomic state reset and initialization | |
2893 | * | |
2894 | * Both the drm core and the atomic helpers assume that there is always the full | |
2895 | * and correct atomic software state for all connectors, CRTCs and planes | |
2896 | * available. Which is a bit a problem on driver load and also after system | |
2897 | * suspend. One way to solve this is to have a hardware state read-out | |
2898 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
2899 | * driver). | |
2900 | * | |
2901 | * The simpler solution is to just reset the software state to everything off, | |
2902 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
2903 | * the atomic helpers provide default reset implementations for all hooks. | |
7f8ee3e5 DV |
2904 | * |
2905 | * On the upside the precise state tracking of atomic simplifies system suspend | |
2906 | * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe | |
2907 | * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume(). | |
2908 | * For other drivers the building blocks are split out, see the documentation | |
2909 | * for these functions. | |
3150c7d0 DV |
2910 | */ |
2911 | ||
d461701c DV |
2912 | /** |
2913 | * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs | |
2914 | * @crtc: drm CRTC | |
2915 | * | |
2916 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
2917 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2918 | */ | |
2919 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
2920 | { | |
b0b5511b | 2921 | if (crtc->state) |
ec2dc6a0 | 2922 | __drm_atomic_helper_crtc_destroy_state(crtc->state); |
b0b5511b | 2923 | |
d461701c DV |
2924 | kfree(crtc->state); |
2925 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
07cc0ef6 DV |
2926 | |
2927 | if (crtc->state) | |
2928 | crtc->state->crtc = crtc; | |
d461701c DV |
2929 | } |
2930 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
2931 | ||
f5e7840b TR |
2932 | /** |
2933 | * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state | |
2934 | * @crtc: CRTC object | |
2935 | * @state: atomic CRTC state | |
2936 | * | |
2937 | * Copies atomic state from a CRTC's current state and resets inferred values. | |
2938 | * This is useful for drivers that subclass the CRTC state. | |
2939 | */ | |
2940 | void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc, | |
2941 | struct drm_crtc_state *state) | |
2942 | { | |
2943 | memcpy(state, crtc->state, sizeof(*state)); | |
2944 | ||
99cf4a29 DS |
2945 | if (state->mode_blob) |
2946 | drm_property_reference_blob(state->mode_blob); | |
5488dc16 LL |
2947 | if (state->degamma_lut) |
2948 | drm_property_reference_blob(state->degamma_lut); | |
2949 | if (state->ctm) | |
2950 | drm_property_reference_blob(state->ctm); | |
2951 | if (state->gamma_lut) | |
2952 | drm_property_reference_blob(state->gamma_lut); | |
f5e7840b TR |
2953 | state->mode_changed = false; |
2954 | state->active_changed = false; | |
2955 | state->planes_changed = false; | |
fc596660 | 2956 | state->connectors_changed = false; |
5488dc16 | 2957 | state->color_mgmt_changed = false; |
f5e7840b TR |
2958 | state->event = NULL; |
2959 | } | |
2960 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state); | |
2961 | ||
d461701c DV |
2962 | /** |
2963 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
2964 | * @crtc: drm CRTC | |
2965 | * | |
2966 | * Default CRTC state duplicate hook for drivers which don't have their own | |
2967 | * subclassed CRTC state structure. | |
2968 | */ | |
2969 | struct drm_crtc_state * | |
2970 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
2971 | { | |
2972 | struct drm_crtc_state *state; | |
2973 | ||
2974 | if (WARN_ON(!crtc->state)) | |
2975 | return NULL; | |
2976 | ||
f5e7840b TR |
2977 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2978 | if (state) | |
2979 | __drm_atomic_helper_crtc_duplicate_state(crtc, state); | |
d461701c DV |
2980 | |
2981 | return state; | |
2982 | } | |
2983 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
2984 | ||
f5e7840b TR |
2985 | /** |
2986 | * __drm_atomic_helper_crtc_destroy_state - release CRTC state | |
f5e7840b TR |
2987 | * @state: CRTC state object to release |
2988 | * | |
2989 | * Releases all resources stored in the CRTC state without actually freeing | |
2990 | * the memory of the CRTC state. This is useful for drivers that subclass the | |
2991 | * CRTC state. | |
2992 | */ | |
ec2dc6a0 | 2993 | void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state) |
f5e7840b | 2994 | { |
5f911905 | 2995 | drm_property_unreference_blob(state->mode_blob); |
5488dc16 LL |
2996 | drm_property_unreference_blob(state->degamma_lut); |
2997 | drm_property_unreference_blob(state->ctm); | |
2998 | drm_property_unreference_blob(state->gamma_lut); | |
f5e7840b TR |
2999 | } |
3000 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); | |
3001 | ||
d461701c DV |
3002 | /** |
3003 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
3004 | * @crtc: drm CRTC | |
3005 | * @state: CRTC state object to release | |
3006 | * | |
3007 | * Default CRTC state destroy hook for drivers which don't have their own | |
3008 | * subclassed CRTC state structure. | |
3009 | */ | |
3010 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
3011 | struct drm_crtc_state *state) | |
3012 | { | |
ec2dc6a0 | 3013 | __drm_atomic_helper_crtc_destroy_state(state); |
d461701c DV |
3014 | kfree(state); |
3015 | } | |
3016 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
3017 | ||
3018 | /** | |
3019 | * drm_atomic_helper_plane_reset - default ->reset hook for planes | |
3020 | * @plane: drm plane | |
3021 | * | |
3022 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
3023 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
3024 | */ | |
3025 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
3026 | { | |
b0b5511b | 3027 | if (plane->state) |
2f701695 | 3028 | __drm_atomic_helper_plane_destroy_state(plane->state); |
321ebf04 | 3029 | |
d461701c DV |
3030 | kfree(plane->state); |
3031 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
07cc0ef6 | 3032 | |
25aaa3a1 | 3033 | if (plane->state) { |
07cc0ef6 | 3034 | plane->state->plane = plane; |
25aaa3a1 MS |
3035 | plane->state->rotation = BIT(DRM_ROTATE_0); |
3036 | } | |
d461701c DV |
3037 | } |
3038 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
3039 | ||
f5e7840b TR |
3040 | /** |
3041 | * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state | |
3042 | * @plane: plane object | |
3043 | * @state: atomic plane state | |
3044 | * | |
3045 | * Copies atomic state from a plane's current state. This is useful for | |
3046 | * drivers that subclass the plane state. | |
3047 | */ | |
3048 | void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane, | |
3049 | struct drm_plane_state *state) | |
3050 | { | |
3051 | memcpy(state, plane->state, sizeof(*state)); | |
3052 | ||
3053 | if (state->fb) | |
3054 | drm_framebuffer_reference(state->fb); | |
3055 | } | |
3056 | EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state); | |
3057 | ||
d461701c DV |
3058 | /** |
3059 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
3060 | * @plane: drm plane | |
3061 | * | |
3062 | * Default plane state duplicate hook for drivers which don't have their own | |
3063 | * subclassed plane state structure. | |
3064 | */ | |
3065 | struct drm_plane_state * | |
3066 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
3067 | { | |
321ebf04 DV |
3068 | struct drm_plane_state *state; |
3069 | ||
d461701c DV |
3070 | if (WARN_ON(!plane->state)) |
3071 | return NULL; | |
3072 | ||
f5e7840b TR |
3073 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
3074 | if (state) | |
3075 | __drm_atomic_helper_plane_duplicate_state(plane, state); | |
321ebf04 DV |
3076 | |
3077 | return state; | |
d461701c DV |
3078 | } |
3079 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
3080 | ||
f5e7840b TR |
3081 | /** |
3082 | * __drm_atomic_helper_plane_destroy_state - release plane state | |
f5e7840b TR |
3083 | * @state: plane state object to release |
3084 | * | |
3085 | * Releases all resources stored in the plane state without actually freeing | |
3086 | * the memory of the plane state. This is useful for drivers that subclass the | |
3087 | * plane state. | |
3088 | */ | |
2f701695 | 3089 | void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state) |
f5e7840b TR |
3090 | { |
3091 | if (state->fb) | |
3092 | drm_framebuffer_unreference(state->fb); | |
3093 | } | |
3094 | EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state); | |
3095 | ||
d461701c DV |
3096 | /** |
3097 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
3098 | * @plane: drm plane | |
3099 | * @state: plane state object to release | |
3100 | * | |
3101 | * Default plane state destroy hook for drivers which don't have their own | |
3102 | * subclassed plane state structure. | |
3103 | */ | |
3104 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
321ebf04 | 3105 | struct drm_plane_state *state) |
d461701c | 3106 | { |
2f701695 | 3107 | __drm_atomic_helper_plane_destroy_state(state); |
d461701c DV |
3108 | kfree(state); |
3109 | } | |
3110 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
3111 | ||
4cd39917 ML |
3112 | /** |
3113 | * __drm_atomic_helper_connector_reset - reset state on connector | |
3114 | * @connector: drm connector | |
3115 | * @conn_state: connector state to assign | |
3116 | * | |
3117 | * Initializes the newly allocated @conn_state and assigns it to | |
3118 | * #connector ->state, usually required when initializing the drivers | |
3119 | * or when called from the ->reset hook. | |
3120 | * | |
3121 | * This is useful for drivers that subclass the connector state. | |
3122 | */ | |
3123 | void | |
3124 | __drm_atomic_helper_connector_reset(struct drm_connector *connector, | |
3125 | struct drm_connector_state *conn_state) | |
3126 | { | |
3127 | if (conn_state) | |
3128 | conn_state->connector = connector; | |
3129 | ||
3130 | connector->state = conn_state; | |
3131 | } | |
3132 | EXPORT_SYMBOL(__drm_atomic_helper_connector_reset); | |
3133 | ||
d461701c DV |
3134 | /** |
3135 | * drm_atomic_helper_connector_reset - default ->reset hook for connectors | |
3136 | * @connector: drm connector | |
3137 | * | |
3138 | * Resets the atomic state for @connector by freeing the state pointer (which | |
3139 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
3140 | * object. | |
3141 | */ | |
3142 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
3143 | { | |
4cd39917 ML |
3144 | struct drm_connector_state *conn_state = |
3145 | kzalloc(sizeof(*conn_state), GFP_KERNEL); | |
07cc0ef6 | 3146 | |
b0b5511b | 3147 | if (connector->state) |
fabd9106 | 3148 | __drm_atomic_helper_connector_destroy_state(connector->state); |
b0b5511b | 3149 | |
4cd39917 ML |
3150 | kfree(connector->state); |
3151 | __drm_atomic_helper_connector_reset(connector, conn_state); | |
d461701c DV |
3152 | } |
3153 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
3154 | ||
f5e7840b TR |
3155 | /** |
3156 | * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state | |
3157 | * @connector: connector object | |
3158 | * @state: atomic connector state | |
3159 | * | |
3160 | * Copies atomic state from a connector's current state. This is useful for | |
3161 | * drivers that subclass the connector state. | |
3162 | */ | |
3163 | void | |
3164 | __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector, | |
3165 | struct drm_connector_state *state) | |
3166 | { | |
3167 | memcpy(state, connector->state, sizeof(*state)); | |
d2307dea DA |
3168 | if (state->crtc) |
3169 | drm_connector_reference(connector); | |
f5e7840b TR |
3170 | } |
3171 | EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state); | |
3172 | ||
d461701c DV |
3173 | /** |
3174 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
3175 | * @connector: drm connector | |
3176 | * | |
3177 | * Default connector state duplicate hook for drivers which don't have their own | |
3178 | * subclassed connector state structure. | |
3179 | */ | |
3180 | struct drm_connector_state * | |
3181 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
3182 | { | |
f5e7840b TR |
3183 | struct drm_connector_state *state; |
3184 | ||
d461701c DV |
3185 | if (WARN_ON(!connector->state)) |
3186 | return NULL; | |
3187 | ||
f5e7840b TR |
3188 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
3189 | if (state) | |
3190 | __drm_atomic_helper_connector_duplicate_state(connector, state); | |
3191 | ||
3192 | return state; | |
d461701c DV |
3193 | } |
3194 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
3195 | ||
397fd77c TR |
3196 | /** |
3197 | * drm_atomic_helper_duplicate_state - duplicate an atomic state object | |
3198 | * @dev: DRM device | |
3199 | * @ctx: lock acquisition context | |
3200 | * | |
3201 | * Makes a copy of the current atomic state by looping over all objects and | |
14942760 TR |
3202 | * duplicating their respective states. This is used for example by suspend/ |
3203 | * resume support code to save the state prior to suspend such that it can | |
3204 | * be restored upon resume. | |
397fd77c TR |
3205 | * |
3206 | * Note that this treats atomic state as persistent between save and restore. | |
3207 | * Drivers must make sure that this is possible and won't result in confusion | |
3208 | * or erroneous behaviour. | |
3209 | * | |
3210 | * Note that if callers haven't already acquired all modeset locks this might | |
3211 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
3212 | * | |
3213 | * Returns: | |
3214 | * A pointer to the copy of the atomic state object on success or an | |
3215 | * ERR_PTR()-encoded error code on failure. | |
14942760 TR |
3216 | * |
3217 | * See also: | |
3218 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
397fd77c TR |
3219 | */ |
3220 | struct drm_atomic_state * | |
3221 | drm_atomic_helper_duplicate_state(struct drm_device *dev, | |
3222 | struct drm_modeset_acquire_ctx *ctx) | |
3223 | { | |
3224 | struct drm_atomic_state *state; | |
3225 | struct drm_connector *conn; | |
3226 | struct drm_plane *plane; | |
3227 | struct drm_crtc *crtc; | |
3228 | int err = 0; | |
3229 | ||
3230 | state = drm_atomic_state_alloc(dev); | |
3231 | if (!state) | |
3232 | return ERR_PTR(-ENOMEM); | |
3233 | ||
3234 | state->acquire_ctx = ctx; | |
3235 | ||
3236 | drm_for_each_crtc(crtc, dev) { | |
3237 | struct drm_crtc_state *crtc_state; | |
3238 | ||
3239 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3240 | if (IS_ERR(crtc_state)) { | |
3241 | err = PTR_ERR(crtc_state); | |
3242 | goto free; | |
3243 | } | |
3244 | } | |
3245 | ||
3246 | drm_for_each_plane(plane, dev) { | |
3247 | struct drm_plane_state *plane_state; | |
3248 | ||
3249 | plane_state = drm_atomic_get_plane_state(state, plane); | |
3250 | if (IS_ERR(plane_state)) { | |
3251 | err = PTR_ERR(plane_state); | |
3252 | goto free; | |
3253 | } | |
3254 | } | |
3255 | ||
3256 | drm_for_each_connector(conn, dev) { | |
3257 | struct drm_connector_state *conn_state; | |
3258 | ||
3259 | conn_state = drm_atomic_get_connector_state(state, conn); | |
3260 | if (IS_ERR(conn_state)) { | |
3261 | err = PTR_ERR(conn_state); | |
3262 | goto free; | |
3263 | } | |
3264 | } | |
3265 | ||
3266 | /* clear the acquire context so that it isn't accidentally reused */ | |
3267 | state->acquire_ctx = NULL; | |
3268 | ||
3269 | free: | |
3270 | if (err < 0) { | |
3271 | drm_atomic_state_free(state); | |
3272 | state = ERR_PTR(err); | |
3273 | } | |
3274 | ||
3275 | return state; | |
3276 | } | |
3277 | EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); | |
3278 | ||
f5e7840b TR |
3279 | /** |
3280 | * __drm_atomic_helper_connector_destroy_state - release connector state | |
f5e7840b TR |
3281 | * @state: connector state object to release |
3282 | * | |
3283 | * Releases all resources stored in the connector state without actually | |
3284 | * freeing the memory of the connector state. This is useful for drivers that | |
3285 | * subclass the connector state. | |
3286 | */ | |
3287 | void | |
fabd9106 | 3288 | __drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state) |
f5e7840b TR |
3289 | { |
3290 | /* | |
3291 | * This is currently a placeholder so that drivers that subclass the | |
3292 | * state will automatically do the right thing if code is ever added | |
3293 | * to this function. | |
3294 | */ | |
d2307dea DA |
3295 | if (state->crtc) |
3296 | drm_connector_unreference(state->connector); | |
f5e7840b TR |
3297 | } |
3298 | EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state); | |
3299 | ||
d461701c DV |
3300 | /** |
3301 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
3302 | * @connector: drm connector | |
3303 | * @state: connector state object to release | |
3304 | * | |
3305 | * Default connector state destroy hook for drivers which don't have their own | |
3306 | * subclassed connector state structure. | |
3307 | */ | |
3308 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
3309 | struct drm_connector_state *state) | |
3310 | { | |
fabd9106 | 3311 | __drm_atomic_helper_connector_destroy_state(state); |
d461701c DV |
3312 | kfree(state); |
3313 | } | |
3314 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); | |
5488dc16 LL |
3315 | |
3316 | /** | |
3317 | * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table | |
3318 | * @crtc: CRTC object | |
3319 | * @red: red correction table | |
3320 | * @green: green correction table | |
3321 | * @blue: green correction table | |
5488dc16 LL |
3322 | * @size: size of the tables |
3323 | * | |
3324 | * Implements support for legacy gamma correction table for drivers | |
3325 | * that support color management through the DEGAMMA_LUT/GAMMA_LUT | |
3326 | * properties. | |
3327 | */ | |
7ea77283 ML |
3328 | int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc, |
3329 | u16 *red, u16 *green, u16 *blue, | |
3330 | uint32_t size) | |
5488dc16 LL |
3331 | { |
3332 | struct drm_device *dev = crtc->dev; | |
3333 | struct drm_mode_config *config = &dev->mode_config; | |
3334 | struct drm_atomic_state *state; | |
3335 | struct drm_crtc_state *crtc_state; | |
3336 | struct drm_property_blob *blob = NULL; | |
3337 | struct drm_color_lut *blob_data; | |
3338 | int i, ret = 0; | |
3339 | ||
3340 | state = drm_atomic_state_alloc(crtc->dev); | |
3341 | if (!state) | |
7ea77283 | 3342 | return -ENOMEM; |
5488dc16 LL |
3343 | |
3344 | blob = drm_property_create_blob(dev, | |
3345 | sizeof(struct drm_color_lut) * size, | |
3346 | NULL); | |
562c5b4d LL |
3347 | if (IS_ERR(blob)) { |
3348 | ret = PTR_ERR(blob); | |
c1f415c9 | 3349 | blob = NULL; |
5488dc16 LL |
3350 | goto fail; |
3351 | } | |
3352 | ||
3353 | /* Prepare GAMMA_LUT with the legacy values. */ | |
3354 | blob_data = (struct drm_color_lut *) blob->data; | |
3355 | for (i = 0; i < size; i++) { | |
3356 | blob_data[i].red = red[i]; | |
3357 | blob_data[i].green = green[i]; | |
3358 | blob_data[i].blue = blue[i]; | |
3359 | } | |
3360 | ||
3361 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
3362 | retry: | |
3363 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3364 | if (IS_ERR(crtc_state)) { | |
3365 | ret = PTR_ERR(crtc_state); | |
3366 | goto fail; | |
3367 | } | |
3368 | ||
3369 | /* Reset DEGAMMA_LUT and CTM properties. */ | |
3370 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3371 | config->degamma_lut_property, 0); | |
3372 | if (ret) | |
3373 | goto fail; | |
3374 | ||
3375 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3376 | config->ctm_property, 0); | |
3377 | if (ret) | |
3378 | goto fail; | |
3379 | ||
3380 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3381 | config->gamma_lut_property, blob->base.id); | |
3382 | if (ret) | |
3383 | goto fail; | |
3384 | ||
3385 | ret = drm_atomic_commit(state); | |
3386 | if (ret) | |
3387 | goto fail; | |
3388 | ||
3389 | /* Driver takes ownership of state on successful commit. */ | |
3390 | ||
3391 | drm_property_unreference_blob(blob); | |
3392 | ||
7ea77283 | 3393 | return 0; |
5488dc16 LL |
3394 | fail: |
3395 | if (ret == -EDEADLK) | |
3396 | goto backoff; | |
3397 | ||
3398 | drm_atomic_state_free(state); | |
3399 | drm_property_unreference_blob(blob); | |
3400 | ||
7ea77283 | 3401 | return ret; |
5488dc16 LL |
3402 | backoff: |
3403 | drm_atomic_state_clear(state); | |
3404 | drm_atomic_legacy_backoff(state); | |
3405 | ||
3406 | goto retry; | |
3407 | } | |
3408 | EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set); |