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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> |
f54d1867 | 33 | #include <linux/dma-fence.h> |
c2fcd274 | 34 | |
44d1240d MS |
35 | #include "drm_crtc_internal.h" |
36 | ||
3150c7d0 DV |
37 | /** |
38 | * DOC: overview | |
39 | * | |
40 | * This helper library provides implementations of check and commit functions on | |
41 | * top of the CRTC modeset helper callbacks and the plane helper callbacks. It | |
42 | * also provides convenience implementations for the atomic state handling | |
43 | * callbacks for drivers which don't need to subclass the drm core structures to | |
44 | * add their own additional internal state. | |
45 | * | |
46 | * This library also provides default implementations for the check callback in | |
26196f7e DV |
47 | * drm_atomic_helper_check() and for the commit callback with |
48 | * drm_atomic_helper_commit(). But the individual stages and callbacks are | |
49 | * exposed to allow drivers to mix and match and e.g. use the plane helpers only | |
3150c7d0 DV |
50 | * together with a driver private modeset implementation. |
51 | * | |
52 | * This library also provides implementations for all the legacy driver | |
26196f7e DV |
53 | * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(), |
54 | * drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the | |
3150c7d0 DV |
55 | * various functions to implement set_property callbacks. New drivers must not |
56 | * implement these functions themselves but must use the provided helpers. | |
092d01da DV |
57 | * |
58 | * The atomic helper uses the same function table structures as all other | |
59 | * modesetting helpers. See the documentation for struct &drm_crtc_helper_funcs, | |
60 | * struct &drm_encoder_helper_funcs and struct &drm_connector_helper_funcs. It | |
61 | * also shares the struct &drm_plane_helper_funcs function table with the plane | |
62 | * helpers. | |
3150c7d0 | 63 | */ |
c2fcd274 DV |
64 | static void |
65 | drm_atomic_helper_plane_changed(struct drm_atomic_state *state, | |
66 | struct drm_plane_state *plane_state, | |
67 | struct drm_plane *plane) | |
68 | { | |
69 | struct drm_crtc_state *crtc_state; | |
70 | ||
71 | if (plane->state->crtc) { | |
2943ef32 AH |
72 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
73 | plane->state->crtc); | |
c2fcd274 DV |
74 | |
75 | if (WARN_ON(!crtc_state)) | |
76 | return; | |
77 | ||
78 | crtc_state->planes_changed = true; | |
79 | } | |
80 | ||
81 | if (plane_state->crtc) { | |
2943ef32 AH |
82 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
83 | plane_state->crtc); | |
c2fcd274 DV |
84 | |
85 | if (WARN_ON(!crtc_state)) | |
86 | return; | |
87 | ||
88 | crtc_state->planes_changed = true; | |
89 | } | |
90 | } | |
91 | ||
8248b65d ML |
92 | static int handle_conflicting_encoders(struct drm_atomic_state *state, |
93 | bool disable_conflicting_encoders) | |
97ac3204 | 94 | { |
97ac3204 | 95 | struct drm_connector_state *conn_state; |
40616a26 ML |
96 | struct drm_connector *connector; |
97 | struct drm_encoder *encoder; | |
98 | unsigned encoder_mask = 0; | |
99 | int i, ret; | |
97ac3204 | 100 | |
8248b65d ML |
101 | /* |
102 | * First loop, find all newly assigned encoders from the connectors | |
103 | * part of the state. If the same encoder is assigned to multiple | |
104 | * connectors bail out. | |
105 | */ | |
97ac3204 | 106 | for_each_connector_in_state(state, connector, conn_state, i) { |
40616a26 ML |
107 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; |
108 | struct drm_encoder *new_encoder; | |
109 | ||
110 | if (!conn_state->crtc) | |
97ac3204 DV |
111 | continue; |
112 | ||
40616a26 ML |
113 | if (funcs->atomic_best_encoder) |
114 | new_encoder = funcs->atomic_best_encoder(connector, conn_state); | |
a0909cc5 | 115 | else if (funcs->best_encoder) |
40616a26 | 116 | new_encoder = funcs->best_encoder(connector); |
a0909cc5 BB |
117 | else |
118 | new_encoder = drm_atomic_helper_best_encoder(connector); | |
40616a26 | 119 | |
8248b65d ML |
120 | if (new_encoder) { |
121 | if (encoder_mask & (1 << drm_encoder_index(new_encoder))) { | |
122 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n", | |
123 | new_encoder->base.id, new_encoder->name, | |
124 | connector->base.id, connector->name); | |
125 | ||
126 | return -EINVAL; | |
127 | } | |
128 | ||
40616a26 | 129 | encoder_mask |= 1 << drm_encoder_index(new_encoder); |
8248b65d | 130 | } |
97ac3204 DV |
131 | } |
132 | ||
8248b65d ML |
133 | if (!encoder_mask) |
134 | return 0; | |
97ac3204 | 135 | |
8248b65d ML |
136 | /* |
137 | * Second loop, iterate over all connectors not part of the state. | |
138 | * | |
139 | * If a conflicting encoder is found and disable_conflicting_encoders | |
140 | * is not set, an error is returned. Userspace can provide a solution | |
141 | * through the atomic ioctl. | |
142 | * | |
143 | * If the flag is set conflicting connectors are removed from the crtc | |
144 | * and the crtc is disabled if no encoder is left. This preserves | |
145 | * compatibility with the legacy set_config behavior. | |
146 | */ | |
40616a26 ML |
147 | drm_for_each_connector(connector, state->dev) { |
148 | struct drm_crtc_state *crtc_state; | |
623369e5 | 149 | |
40616a26 ML |
150 | if (drm_atomic_get_existing_connector_state(state, connector)) |
151 | continue; | |
623369e5 | 152 | |
40616a26 ML |
153 | encoder = connector->state->best_encoder; |
154 | if (!encoder || !(encoder_mask & (1 << drm_encoder_index(encoder)))) | |
623369e5 DV |
155 | continue; |
156 | ||
8248b65d ML |
157 | if (!disable_conflicting_encoders) { |
158 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n", | |
159 | encoder->base.id, encoder->name, | |
160 | connector->state->crtc->base.id, | |
161 | connector->state->crtc->name, | |
162 | connector->base.id, connector->name); | |
163 | return -EINVAL; | |
164 | } | |
165 | ||
40616a26 ML |
166 | conn_state = drm_atomic_get_connector_state(state, connector); |
167 | if (IS_ERR(conn_state)) | |
168 | return PTR_ERR(conn_state); | |
169 | ||
170 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n", | |
171 | encoder->base.id, encoder->name, | |
172 | conn_state->crtc->base.id, conn_state->crtc->name, | |
173 | connector->base.id, connector->name); | |
174 | ||
175 | crtc_state = drm_atomic_get_existing_crtc_state(state, conn_state->crtc); | |
176 | ||
177 | ret = drm_atomic_set_crtc_for_connector(conn_state, NULL); | |
178 | if (ret) | |
179 | return ret; | |
180 | ||
181 | if (!crtc_state->connector_mask) { | |
182 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, | |
183 | NULL); | |
184 | if (ret < 0) | |
185 | return ret; | |
186 | ||
187 | crtc_state->active = false; | |
188 | } | |
623369e5 DV |
189 | } |
190 | ||
40616a26 | 191 | return 0; |
623369e5 DV |
192 | } |
193 | ||
e87a52b3 ML |
194 | static void |
195 | set_best_encoder(struct drm_atomic_state *state, | |
196 | struct drm_connector_state *conn_state, | |
197 | struct drm_encoder *encoder) | |
198 | { | |
199 | struct drm_crtc_state *crtc_state; | |
200 | struct drm_crtc *crtc; | |
201 | ||
202 | if (conn_state->best_encoder) { | |
203 | /* Unset the encoder_mask in the old crtc state. */ | |
204 | crtc = conn_state->connector->state->crtc; | |
205 | ||
206 | /* A NULL crtc is an error here because we should have | |
207 | * duplicated a NULL best_encoder when crtc was NULL. | |
208 | * As an exception restoring duplicated atomic state | |
209 | * during resume is allowed, so don't warn when | |
210 | * best_encoder is equal to encoder we intend to set. | |
211 | */ | |
212 | WARN_ON(!crtc && encoder != conn_state->best_encoder); | |
213 | if (crtc) { | |
214 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); | |
215 | ||
216 | crtc_state->encoder_mask &= | |
217 | ~(1 << drm_encoder_index(conn_state->best_encoder)); | |
218 | } | |
219 | } | |
220 | ||
221 | if (encoder) { | |
222 | crtc = conn_state->crtc; | |
223 | WARN_ON(!crtc); | |
224 | if (crtc) { | |
225 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); | |
226 | ||
227 | crtc_state->encoder_mask |= | |
228 | 1 << drm_encoder_index(encoder); | |
229 | } | |
230 | } | |
231 | ||
232 | conn_state->best_encoder = encoder; | |
233 | } | |
234 | ||
ec5aaa58 | 235 | static void |
623369e5 | 236 | steal_encoder(struct drm_atomic_state *state, |
ff19b786 | 237 | struct drm_encoder *encoder) |
623369e5 | 238 | { |
623369e5 DV |
239 | struct drm_crtc_state *crtc_state; |
240 | struct drm_connector *connector; | |
241 | struct drm_connector_state *connector_state; | |
ec5aaa58 | 242 | int i; |
623369e5 | 243 | |
ec5aaa58 | 244 | for_each_connector_in_state(state, connector, connector_state, i) { |
ff19b786 | 245 | struct drm_crtc *encoder_crtc; |
623369e5 | 246 | |
e87a52b3 | 247 | if (connector_state->best_encoder != encoder) |
623369e5 DV |
248 | continue; |
249 | ||
ff19b786 | 250 | encoder_crtc = connector->state->crtc; |
623369e5 | 251 | |
ff19b786 ML |
252 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n", |
253 | encoder->base.id, encoder->name, | |
254 | encoder_crtc->base.id, encoder_crtc->name); | |
e87a52b3 ML |
255 | |
256 | set_best_encoder(state, connector_state, NULL); | |
623369e5 | 257 | |
ff19b786 ML |
258 | crtc_state = drm_atomic_get_existing_crtc_state(state, encoder_crtc); |
259 | crtc_state->connectors_changed = true; | |
260 | ||
ec5aaa58 | 261 | return; |
623369e5 | 262 | } |
623369e5 DV |
263 | } |
264 | ||
265 | static int | |
9459545b ML |
266 | update_connector_routing(struct drm_atomic_state *state, |
267 | struct drm_connector *connector, | |
268 | struct drm_connector_state *connector_state) | |
623369e5 | 269 | { |
b5ceff20 | 270 | const struct drm_connector_helper_funcs *funcs; |
623369e5 | 271 | struct drm_encoder *new_encoder; |
623369e5 | 272 | struct drm_crtc_state *crtc_state; |
623369e5 | 273 | |
17a38d9c DV |
274 | DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n", |
275 | connector->base.id, | |
276 | connector->name); | |
623369e5 DV |
277 | |
278 | if (connector->state->crtc != connector_state->crtc) { | |
279 | if (connector->state->crtc) { | |
9b8d1e53 | 280 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector->state->crtc); |
fc596660 | 281 | crtc_state->connectors_changed = true; |
623369e5 DV |
282 | } |
283 | ||
284 | if (connector_state->crtc) { | |
9b8d1e53 | 285 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc); |
fc596660 | 286 | crtc_state->connectors_changed = true; |
623369e5 DV |
287 | } |
288 | } | |
289 | ||
290 | if (!connector_state->crtc) { | |
17a38d9c | 291 | DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n", |
623369e5 DV |
292 | connector->base.id, |
293 | connector->name); | |
294 | ||
e87a52b3 | 295 | set_best_encoder(state, connector_state, NULL); |
623369e5 DV |
296 | |
297 | return 0; | |
298 | } | |
299 | ||
300 | funcs = connector->helper_private; | |
3b8a684b DV |
301 | |
302 | if (funcs->atomic_best_encoder) | |
303 | new_encoder = funcs->atomic_best_encoder(connector, | |
304 | connector_state); | |
c61b93fe | 305 | else if (funcs->best_encoder) |
3b8a684b | 306 | new_encoder = funcs->best_encoder(connector); |
c61b93fe BB |
307 | else |
308 | new_encoder = drm_atomic_helper_best_encoder(connector); | |
623369e5 DV |
309 | |
310 | if (!new_encoder) { | |
17a38d9c DV |
311 | DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", |
312 | connector->base.id, | |
313 | connector->name); | |
623369e5 DV |
314 | return -EINVAL; |
315 | } | |
316 | ||
5481c8fb DV |
317 | if (!drm_encoder_crtc_ok(new_encoder, connector_state->crtc)) { |
318 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d]\n", | |
319 | new_encoder->base.id, | |
320 | new_encoder->name, | |
321 | connector_state->crtc->base.id); | |
322 | return -EINVAL; | |
323 | } | |
324 | ||
623369e5 | 325 | if (new_encoder == connector_state->best_encoder) { |
e87a52b3 ML |
326 | set_best_encoder(state, connector_state, new_encoder); |
327 | ||
fa3ab4c2 | 328 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n", |
17a38d9c DV |
329 | connector->base.id, |
330 | connector->name, | |
331 | new_encoder->base.id, | |
332 | new_encoder->name, | |
fa3ab4c2 VS |
333 | connector_state->crtc->base.id, |
334 | connector_state->crtc->name); | |
623369e5 DV |
335 | |
336 | return 0; | |
337 | } | |
338 | ||
ec5aaa58 | 339 | steal_encoder(state, new_encoder); |
6ea76f3c | 340 | |
e87a52b3 ML |
341 | set_best_encoder(state, connector_state, new_encoder); |
342 | ||
9b8d1e53 | 343 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc); |
fc596660 | 344 | crtc_state->connectors_changed = true; |
623369e5 | 345 | |
fa3ab4c2 | 346 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n", |
17a38d9c DV |
347 | connector->base.id, |
348 | connector->name, | |
349 | new_encoder->base.id, | |
350 | new_encoder->name, | |
fa3ab4c2 VS |
351 | connector_state->crtc->base.id, |
352 | connector_state->crtc->name); | |
623369e5 DV |
353 | |
354 | return 0; | |
355 | } | |
356 | ||
357 | static int | |
358 | mode_fixup(struct drm_atomic_state *state) | |
359 | { | |
df63b999 | 360 | struct drm_crtc *crtc; |
623369e5 | 361 | struct drm_crtc_state *crtc_state; |
df63b999 | 362 | struct drm_connector *connector; |
623369e5 DV |
363 | struct drm_connector_state *conn_state; |
364 | int i; | |
365 | bool ret; | |
366 | ||
df63b999 | 367 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
fc596660 ML |
368 | if (!crtc_state->mode_changed && |
369 | !crtc_state->connectors_changed) | |
623369e5 DV |
370 | continue; |
371 | ||
372 | drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); | |
373 | } | |
374 | ||
df63b999 | 375 | for_each_connector_in_state(state, connector, conn_state, i) { |
b5ceff20 | 376 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
377 | struct drm_encoder *encoder; |
378 | ||
623369e5 DV |
379 | WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); |
380 | ||
381 | if (!conn_state->crtc || !conn_state->best_encoder) | |
382 | continue; | |
383 | ||
2943ef32 AH |
384 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
385 | conn_state->crtc); | |
623369e5 DV |
386 | |
387 | /* | |
388 | * Each encoder has at most one connector (since we always steal | |
389 | * it away), so we won't call ->mode_fixup twice. | |
390 | */ | |
391 | encoder = conn_state->best_encoder; | |
392 | funcs = encoder->helper_private; | |
393 | ||
862e686c AT |
394 | ret = drm_bridge_mode_fixup(encoder->bridge, &crtc_state->mode, |
395 | &crtc_state->adjusted_mode); | |
396 | if (!ret) { | |
397 | DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); | |
398 | return -EINVAL; | |
623369e5 DV |
399 | } |
400 | ||
2827635e | 401 | if (funcs && funcs->atomic_check) { |
4cd4df80 TR |
402 | ret = funcs->atomic_check(encoder, crtc_state, |
403 | conn_state); | |
404 | if (ret) { | |
17a38d9c DV |
405 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", |
406 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
407 | return ret; |
408 | } | |
2827635e | 409 | } else if (funcs && funcs->mode_fixup) { |
4cd4df80 TR |
410 | ret = funcs->mode_fixup(encoder, &crtc_state->mode, |
411 | &crtc_state->adjusted_mode); | |
412 | if (!ret) { | |
17a38d9c DV |
413 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", |
414 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
415 | return -EINVAL; |
416 | } | |
623369e5 DV |
417 | } |
418 | } | |
419 | ||
df63b999 | 420 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 421 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 422 | |
f55f1701 LY |
423 | if (!crtc_state->enable) |
424 | continue; | |
425 | ||
fc596660 ML |
426 | if (!crtc_state->mode_changed && |
427 | !crtc_state->connectors_changed) | |
623369e5 DV |
428 | continue; |
429 | ||
430 | funcs = crtc->helper_private; | |
840bfe95 ACO |
431 | if (!funcs->mode_fixup) |
432 | continue; | |
433 | ||
623369e5 DV |
434 | ret = funcs->mode_fixup(crtc, &crtc_state->mode, |
435 | &crtc_state->adjusted_mode); | |
436 | if (!ret) { | |
fa3ab4c2 VS |
437 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n", |
438 | crtc->base.id, crtc->name); | |
623369e5 DV |
439 | return -EINVAL; |
440 | } | |
441 | } | |
442 | ||
443 | return 0; | |
444 | } | |
445 | ||
d9b13620 | 446 | /** |
f98bd3ef | 447 | * drm_atomic_helper_check_modeset - validate state object for modeset changes |
d9b13620 DV |
448 | * @dev: DRM device |
449 | * @state: the driver state object | |
450 | * | |
451 | * Check the state object to see if the requested state is physically possible. | |
452 | * This does all the crtc and connector related computations for an atomic | |
fc596660 ML |
453 | * update and adds any additional connectors needed for full modesets and calls |
454 | * down into ->mode_fixup functions of the driver backend. | |
455 | * | |
456 | * crtc_state->mode_changed is set when the input mode is changed. | |
457 | * crtc_state->connectors_changed is set when a connector is added or | |
458 | * removed from the crtc. | |
459 | * crtc_state->active_changed is set when crtc_state->active changes, | |
460 | * which is used for dpms. | |
d807ed1c | 461 | * See also: drm_atomic_crtc_needs_modeset() |
d9b13620 DV |
462 | * |
463 | * IMPORTANT: | |
464 | * | |
d807ed1c | 465 | * Drivers which set ->mode_changed (e.g. in their ->atomic_check hooks if a |
d9b13620 DV |
466 | * plane update can't be done without a full modeset) _must_ call this function |
467 | * afterwards after that change. It is permitted to call this function multiple | |
468 | * times for the same update, e.g. when the ->atomic_check functions depend upon | |
469 | * the adjusted dotclock for fifo space allocation and watermark computation. | |
470 | * | |
c39032a8 | 471 | * RETURNS: |
d9b13620 DV |
472 | * Zero for success or -errno |
473 | */ | |
474 | int | |
934ce1c2 | 475 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
476 | struct drm_atomic_state *state) |
477 | { | |
623369e5 DV |
478 | struct drm_crtc *crtc; |
479 | struct drm_crtc_state *crtc_state; | |
df63b999 ACO |
480 | struct drm_connector *connector; |
481 | struct drm_connector_state *connector_state; | |
623369e5 DV |
482 | int i, ret; |
483 | ||
df63b999 | 484 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 | 485 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { |
fa3ab4c2 VS |
486 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n", |
487 | crtc->base.id, crtc->name); | |
623369e5 DV |
488 | crtc_state->mode_changed = true; |
489 | } | |
490 | ||
491 | if (crtc->state->enable != crtc_state->enable) { | |
fa3ab4c2 VS |
492 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n", |
493 | crtc->base.id, crtc->name); | |
fc596660 ML |
494 | |
495 | /* | |
496 | * For clarity this assignment is done here, but | |
497 | * enable == 0 is only true when there are no | |
498 | * connectors and a NULL mode. | |
499 | * | |
500 | * The other way around is true as well. enable != 0 | |
501 | * iff connectors are attached and a mode is set. | |
502 | */ | |
623369e5 | 503 | crtc_state->mode_changed = true; |
fc596660 | 504 | crtc_state->connectors_changed = true; |
623369e5 DV |
505 | } |
506 | } | |
507 | ||
8248b65d ML |
508 | ret = handle_conflicting_encoders(state, state->legacy_set_config); |
509 | if (ret) | |
510 | return ret; | |
40616a26 | 511 | |
df63b999 | 512 | for_each_connector_in_state(state, connector, connector_state, i) { |
623369e5 | 513 | /* |
d807ed1c BS |
514 | * This only sets crtc->connectors_changed for routing changes, |
515 | * drivers must set crtc->connectors_changed themselves when | |
516 | * connector properties need to be updated. | |
623369e5 | 517 | */ |
9459545b ML |
518 | ret = update_connector_routing(state, connector, |
519 | connector_state); | |
623369e5 DV |
520 | if (ret) |
521 | return ret; | |
522 | } | |
523 | ||
524 | /* | |
525 | * After all the routing has been prepared we need to add in any | |
526 | * connector which is itself unchanged, but who's crtc changes it's | |
527 | * configuration. This must be done before calling mode_fixup in case a | |
528 | * crtc only changed its mode but has the same set of connectors. | |
529 | */ | |
df63b999 | 530 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
14de6c44 ML |
531 | bool has_connectors = |
532 | !!crtc_state->connector_mask; | |
623369e5 | 533 | |
eab3bbef DV |
534 | /* |
535 | * We must set ->active_changed after walking connectors for | |
536 | * otherwise an update that only changes active would result in | |
537 | * a full modeset because update_connector_routing force that. | |
538 | */ | |
539 | if (crtc->state->active != crtc_state->active) { | |
fa3ab4c2 VS |
540 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", |
541 | crtc->base.id, crtc->name); | |
eab3bbef DV |
542 | crtc_state->active_changed = true; |
543 | } | |
544 | ||
2465ff62 | 545 | if (!drm_atomic_crtc_needs_modeset(crtc_state)) |
623369e5 DV |
546 | continue; |
547 | ||
fa3ab4c2 VS |
548 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n", |
549 | crtc->base.id, crtc->name, | |
17a38d9c | 550 | crtc_state->enable ? 'y' : 'n', |
fa3ab4c2 | 551 | crtc_state->active ? 'y' : 'n'); |
623369e5 DV |
552 | |
553 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
554 | if (ret != 0) | |
555 | return ret; | |
556 | ||
57744aa7 ML |
557 | ret = drm_atomic_add_affected_planes(state, crtc); |
558 | if (ret != 0) | |
559 | return ret; | |
560 | ||
14de6c44 | 561 | if (crtc_state->enable != has_connectors) { |
fa3ab4c2 VS |
562 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", |
563 | crtc->base.id, crtc->name); | |
623369e5 DV |
564 | |
565 | return -EINVAL; | |
566 | } | |
567 | } | |
568 | ||
569 | return mode_fixup(state); | |
570 | } | |
d9b13620 | 571 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 572 | |
c2fcd274 | 573 | /** |
f98bd3ef | 574 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
575 | * @dev: DRM device |
576 | * @state: the driver state object | |
577 | * | |
578 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 DV |
579 | * This does all the plane update related checks using by calling into the |
580 | * ->atomic_check hooks provided by the driver. | |
c2fcd274 | 581 | * |
fc596660 ML |
582 | * It also sets crtc_state->planes_changed to indicate that a crtc has |
583 | * updated planes. | |
584 | * | |
c39032a8 | 585 | * RETURNS: |
c2fcd274 DV |
586 | * Zero for success or -errno |
587 | */ | |
d9b13620 DV |
588 | int |
589 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
590 | struct drm_atomic_state *state) | |
c2fcd274 | 591 | { |
df63b999 ACO |
592 | struct drm_crtc *crtc; |
593 | struct drm_crtc_state *crtc_state; | |
594 | struct drm_plane *plane; | |
595 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
596 | int i, ret = 0; |
597 | ||
df63b999 | 598 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 599 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
600 | |
601 | funcs = plane->helper_private; | |
602 | ||
603 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
604 | ||
605 | if (!funcs || !funcs->atomic_check) | |
606 | continue; | |
607 | ||
608 | ret = funcs->atomic_check(plane, plane_state); | |
609 | if (ret) { | |
9f4c97a2 VS |
610 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n", |
611 | plane->base.id, plane->name); | |
c2fcd274 DV |
612 | return ret; |
613 | } | |
614 | } | |
615 | ||
df63b999 | 616 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 617 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
618 | |
619 | funcs = crtc->helper_private; | |
620 | ||
621 | if (!funcs || !funcs->atomic_check) | |
622 | continue; | |
623 | ||
be9174a4 | 624 | ret = funcs->atomic_check(crtc, crtc_state); |
c2fcd274 | 625 | if (ret) { |
fa3ab4c2 VS |
626 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n", |
627 | crtc->base.id, crtc->name); | |
c2fcd274 DV |
628 | return ret; |
629 | } | |
630 | } | |
631 | ||
d9b13620 DV |
632 | return ret; |
633 | } | |
634 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
635 | ||
636 | /** | |
637 | * drm_atomic_helper_check - validate state object | |
638 | * @dev: DRM device | |
639 | * @state: the driver state object | |
640 | * | |
641 | * Check the state object to see if the requested state is physically possible. | |
642 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
643 | * checking that a driver needs it can simply wrap that around this function. | |
644 | * Drivers without such needs can directly use this as their ->atomic_check() | |
645 | * callback. | |
646 | * | |
b4274fbe DV |
647 | * This just wraps the two parts of the state checking for planes and modeset |
648 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
649 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
650 | * ->atomic_check functions depend upon an updated adjusted_mode.clock to | |
651 | * e.g. properly compute watermarks. | |
652 | * | |
c39032a8 | 653 | * RETURNS: |
d9b13620 DV |
654 | * Zero for success or -errno |
655 | */ | |
656 | int drm_atomic_helper_check(struct drm_device *dev, | |
657 | struct drm_atomic_state *state) | |
658 | { | |
659 | int ret; | |
660 | ||
b4274fbe | 661 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
662 | if (ret) |
663 | return ret; | |
664 | ||
b4274fbe | 665 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
666 | if (ret) |
667 | return ret; | |
668 | ||
c2fcd274 DV |
669 | return ret; |
670 | } | |
671 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
672 | ||
623369e5 DV |
673 | static void |
674 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
675 | { | |
df63b999 ACO |
676 | struct drm_connector *connector; |
677 | struct drm_connector_state *old_conn_state; | |
678 | struct drm_crtc *crtc; | |
679 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
680 | int i; |
681 | ||
df63b999 | 682 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 683 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
684 | struct drm_encoder *encoder; |
685 | ||
623369e5 DV |
686 | /* Shut down everything that's in the changeset and currently |
687 | * still on. So need to check the old, saved state. */ | |
df63b999 | 688 | if (!old_conn_state->crtc) |
623369e5 DV |
689 | continue; |
690 | ||
2943ef32 AH |
691 | old_crtc_state = drm_atomic_get_existing_crtc_state(old_state, |
692 | old_conn_state->crtc); | |
eab3bbef | 693 | |
4218a32f | 694 | if (!old_crtc_state->active || |
2465ff62 | 695 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) |
eab3bbef DV |
696 | continue; |
697 | ||
46df9adb | 698 | encoder = old_conn_state->best_encoder; |
623369e5 | 699 | |
46df9adb RC |
700 | /* We shouldn't get this far if we didn't previously have |
701 | * an encoder.. but WARN_ON() rather than explode. | |
702 | */ | |
703 | if (WARN_ON(!encoder)) | |
623369e5 DV |
704 | continue; |
705 | ||
706 | funcs = encoder->helper_private; | |
707 | ||
17a38d9c DV |
708 | DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
709 | encoder->base.id, encoder->name); | |
95d6eb3b | 710 | |
623369e5 DV |
711 | /* |
712 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 713 | * it away), so we won't call disable hooks twice. |
623369e5 | 714 | */ |
862e686c | 715 | drm_bridge_disable(encoder->bridge); |
623369e5 DV |
716 | |
717 | /* Right function depends upon target state. */ | |
2827635e NT |
718 | if (funcs) { |
719 | if (connector->state->crtc && funcs->prepare) | |
720 | funcs->prepare(encoder); | |
721 | else if (funcs->disable) | |
722 | funcs->disable(encoder); | |
723 | else if (funcs->dpms) | |
724 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
725 | } | |
623369e5 | 726 | |
862e686c | 727 | drm_bridge_post_disable(encoder->bridge); |
623369e5 DV |
728 | } |
729 | ||
df63b999 | 730 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 731 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
732 | |
733 | /* Shut down everything that needs a full modeset. */ | |
2465ff62 | 734 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
735 | continue; |
736 | ||
737 | if (!old_crtc_state->active) | |
623369e5 DV |
738 | continue; |
739 | ||
740 | funcs = crtc->helper_private; | |
741 | ||
fa3ab4c2 VS |
742 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n", |
743 | crtc->base.id, crtc->name); | |
95d6eb3b DV |
744 | |
745 | ||
623369e5 | 746 | /* Right function depends upon target state. */ |
ee0a89cf | 747 | if (crtc->state->enable && funcs->prepare) |
623369e5 | 748 | funcs->prepare(crtc); |
c9ac8b4c LY |
749 | else if (funcs->atomic_disable) |
750 | funcs->atomic_disable(crtc, old_crtc_state); | |
623369e5 DV |
751 | else if (funcs->disable) |
752 | funcs->disable(crtc); | |
753 | else | |
754 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
755 | } | |
756 | } | |
757 | ||
4c18d301 DV |
758 | /** |
759 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state | |
760 | * @dev: DRM device | |
761 | * @old_state: atomic state object with old state structures | |
762 | * | |
763 | * This function updates all the various legacy modeset state pointers in | |
764 | * connectors, encoders and crtcs. It also updates the timestamping constants | |
765 | * used for precise vblank timestamps by calling | |
766 | * drm_calc_timestamping_constants(). | |
767 | * | |
768 | * Drivers can use this for building their own atomic commit if they don't have | |
769 | * a pure helper-based modeset implementation. | |
770 | */ | |
771 | void | |
772 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, | |
773 | struct drm_atomic_state *old_state) | |
623369e5 | 774 | { |
df63b999 ACO |
775 | struct drm_connector *connector; |
776 | struct drm_connector_state *old_conn_state; | |
777 | struct drm_crtc *crtc; | |
778 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
779 | int i; |
780 | ||
8c10342c | 781 | /* clear out existing links and update dpms */ |
df63b999 | 782 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
8c10342c ML |
783 | if (connector->encoder) { |
784 | WARN_ON(!connector->encoder->crtc); | |
785 | ||
786 | connector->encoder->crtc = NULL; | |
787 | connector->encoder = NULL; | |
788 | } | |
623369e5 | 789 | |
8c10342c ML |
790 | crtc = connector->state->crtc; |
791 | if ((!crtc && old_conn_state->crtc) || | |
792 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { | |
793 | struct drm_property *dpms_prop = | |
794 | dev->mode_config.dpms_property; | |
795 | int mode = DRM_MODE_DPMS_OFF; | |
623369e5 | 796 | |
8c10342c ML |
797 | if (crtc && crtc->state->active) |
798 | mode = DRM_MODE_DPMS_ON; | |
799 | ||
800 | connector->dpms = mode; | |
801 | drm_object_property_set_value(&connector->base, | |
802 | dpms_prop, mode); | |
803 | } | |
623369e5 DV |
804 | } |
805 | ||
806 | /* set new links */ | |
df63b999 ACO |
807 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
808 | if (!connector->state->crtc) | |
623369e5 DV |
809 | continue; |
810 | ||
811 | if (WARN_ON(!connector->state->best_encoder)) | |
812 | continue; | |
813 | ||
814 | connector->encoder = connector->state->best_encoder; | |
815 | connector->encoder->crtc = connector->state->crtc; | |
816 | } | |
817 | ||
818 | /* set legacy state in the crtc structure */ | |
df63b999 | 819 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
2660801f ML |
820 | struct drm_plane *primary = crtc->primary; |
821 | ||
623369e5 DV |
822 | crtc->mode = crtc->state->mode; |
823 | crtc->enabled = crtc->state->enable; | |
2660801f ML |
824 | |
825 | if (drm_atomic_get_existing_plane_state(old_state, primary) && | |
826 | primary->state->crtc == crtc) { | |
827 | crtc->x = primary->state->src_x >> 16; | |
828 | crtc->y = primary->state->src_y >> 16; | |
829 | } | |
3d51d2d2 DV |
830 | |
831 | if (crtc->state->enable) | |
832 | drm_calc_timestamping_constants(crtc, | |
833 | &crtc->state->adjusted_mode); | |
623369e5 DV |
834 | } |
835 | } | |
4c18d301 | 836 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); |
623369e5 DV |
837 | |
838 | static void | |
839 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
840 | { | |
df63b999 ACO |
841 | struct drm_crtc *crtc; |
842 | struct drm_crtc_state *old_crtc_state; | |
843 | struct drm_connector *connector; | |
844 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
845 | int i; |
846 | ||
df63b999 | 847 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 848 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 849 | |
df63b999 | 850 | if (!crtc->state->mode_changed) |
623369e5 DV |
851 | continue; |
852 | ||
853 | funcs = crtc->helper_private; | |
854 | ||
c982bd90 | 855 | if (crtc->state->enable && funcs->mode_set_nofb) { |
fa3ab4c2 VS |
856 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n", |
857 | crtc->base.id, crtc->name); | |
95d6eb3b | 858 | |
623369e5 | 859 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 860 | } |
623369e5 DV |
861 | } |
862 | ||
df63b999 | 863 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 864 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 865 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
866 | struct drm_encoder *encoder; |
867 | struct drm_display_mode *mode, *adjusted_mode; | |
868 | ||
df63b999 | 869 | if (!connector->state->best_encoder) |
623369e5 DV |
870 | continue; |
871 | ||
872 | encoder = connector->state->best_encoder; | |
873 | funcs = encoder->helper_private; | |
874 | new_crtc_state = connector->state->crtc->state; | |
875 | mode = &new_crtc_state->mode; | |
876 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
877 | ||
eab3bbef DV |
878 | if (!new_crtc_state->mode_changed) |
879 | continue; | |
880 | ||
17a38d9c DV |
881 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
882 | encoder->base.id, encoder->name); | |
95d6eb3b | 883 | |
623369e5 DV |
884 | /* |
885 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 886 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 887 | */ |
fe4a11c9 PZ |
888 | if (funcs && funcs->atomic_mode_set) { |
889 | funcs->atomic_mode_set(encoder, new_crtc_state, | |
890 | connector->state); | |
891 | } else if (funcs && funcs->mode_set) { | |
c982bd90 | 892 | funcs->mode_set(encoder, mode, adjusted_mode); |
fe4a11c9 | 893 | } |
623369e5 | 894 | |
862e686c | 895 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
623369e5 DV |
896 | } |
897 | } | |
898 | ||
899 | /** | |
1af434a9 | 900 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 901 | * @dev: DRM device |
a072f809 | 902 | * @old_state: atomic state object with old state structures |
623369e5 | 903 | * |
1af434a9 | 904 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 905 | * prepares them (if required) with the new mode. |
1af434a9 | 906 | * |
60acc4eb | 907 | * For compatibility with legacy crtc helpers this should be called before |
1af434a9 DV |
908 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
909 | * does. But drivers with different needs can group the modeset commits together | |
910 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
911 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 912 | */ |
1af434a9 DV |
913 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
914 | struct drm_atomic_state *old_state) | |
623369e5 | 915 | { |
a072f809 | 916 | disable_outputs(dev, old_state); |
4c18d301 DV |
917 | |
918 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); | |
919 | ||
a072f809 | 920 | crtc_set_mode(dev, old_state); |
623369e5 | 921 | } |
1af434a9 | 922 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 DV |
923 | |
924 | /** | |
1af434a9 | 925 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
926 | * @dev: DRM device |
927 | * @old_state: atomic state object with old state structures | |
928 | * | |
1af434a9 DV |
929 | * This function enables all the outputs with the new configuration which had to |
930 | * be turned off for the update. | |
931 | * | |
60acc4eb | 932 | * For compatibility with legacy crtc helpers this should be called after |
1af434a9 DV |
933 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
934 | * does. But drivers with different needs can group the modeset commits together | |
935 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
936 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 937 | */ |
1af434a9 DV |
938 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
939 | struct drm_atomic_state *old_state) | |
623369e5 | 940 | { |
df63b999 ACO |
941 | struct drm_crtc *crtc; |
942 | struct drm_crtc_state *old_crtc_state; | |
943 | struct drm_connector *connector; | |
944 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
945 | int i; |
946 | ||
df63b999 | 947 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 948 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
949 | |
950 | /* Need to filter out CRTCs where only planes change. */ | |
2465ff62 | 951 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
952 | continue; |
953 | ||
954 | if (!crtc->state->active) | |
623369e5 DV |
955 | continue; |
956 | ||
957 | funcs = crtc->helper_private; | |
958 | ||
ee0a89cf | 959 | if (crtc->state->enable) { |
fa3ab4c2 VS |
960 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n", |
961 | crtc->base.id, crtc->name); | |
95d6eb3b | 962 | |
ee0a89cf DV |
963 | if (funcs->enable) |
964 | funcs->enable(crtc); | |
965 | else | |
966 | funcs->commit(crtc); | |
967 | } | |
623369e5 DV |
968 | } |
969 | ||
df63b999 | 970 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 971 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
972 | struct drm_encoder *encoder; |
973 | ||
df63b999 | 974 | if (!connector->state->best_encoder) |
623369e5 DV |
975 | continue; |
976 | ||
4218a32f | 977 | if (!connector->state->crtc->state->active || |
2465ff62 | 978 | !drm_atomic_crtc_needs_modeset(connector->state->crtc->state)) |
eab3bbef DV |
979 | continue; |
980 | ||
623369e5 DV |
981 | encoder = connector->state->best_encoder; |
982 | funcs = encoder->helper_private; | |
983 | ||
17a38d9c DV |
984 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
985 | encoder->base.id, encoder->name); | |
95d6eb3b | 986 | |
623369e5 DV |
987 | /* |
988 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 989 | * it away), so we won't call enable hooks twice. |
623369e5 | 990 | */ |
862e686c | 991 | drm_bridge_pre_enable(encoder->bridge); |
623369e5 | 992 | |
2827635e NT |
993 | if (funcs) { |
994 | if (funcs->enable) | |
995 | funcs->enable(encoder); | |
996 | else if (funcs->commit) | |
997 | funcs->commit(encoder); | |
998 | } | |
623369e5 | 999 | |
862e686c | 1000 | drm_bridge_enable(encoder->bridge); |
623369e5 DV |
1001 | } |
1002 | } | |
1af434a9 | 1003 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 1004 | |
4c5b7f3a RC |
1005 | /** |
1006 | * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state | |
1007 | * @dev: DRM device | |
1008 | * @state: atomic state object with old state structures | |
1ea0c02e DV |
1009 | * @pre_swap: If true, do an interruptible wait, and @state is the new state. |
1010 | * Otherwise @state is the old state. | |
4c5b7f3a RC |
1011 | * |
1012 | * For implicit sync, driver should fish the exclusive fence out from the | |
1013 | * incoming fb's and stash it in the drm_plane_state. This is called after | |
1014 | * drm_atomic_helper_swap_state() so it uses the current plane state (and | |
1015 | * just uses the atomic state to find the changed planes) | |
f6ce410a | 1016 | * |
1ea0c02e DV |
1017 | * Note that @pre_swap is needed since the point where we block for fences moves |
1018 | * around depending upon whether an atomic commit is blocking or | |
1019 | * non-blocking. For async commit all waiting needs to happen after | |
1020 | * drm_atomic_helper_swap_state() is called, but for synchronous commits we want | |
1021 | * to wait **before** we do anything that can't be easily rolled back. That is | |
1022 | * before we call drm_atomic_helper_swap_state(). | |
1023 | * | |
f54d1867 | 1024 | * Returns zero if success or < 0 if dma_fence_wait() fails. |
4c5b7f3a | 1025 | */ |
f6ce410a GP |
1026 | int drm_atomic_helper_wait_for_fences(struct drm_device *dev, |
1027 | struct drm_atomic_state *state, | |
1028 | bool pre_swap) | |
e2330f07 | 1029 | { |
df63b999 ACO |
1030 | struct drm_plane *plane; |
1031 | struct drm_plane_state *plane_state; | |
f6ce410a | 1032 | int i, ret; |
e2330f07 | 1033 | |
df63b999 | 1034 | for_each_plane_in_state(state, plane, plane_state, i) { |
f6ce410a GP |
1035 | if (!pre_swap) |
1036 | plane_state = plane->state; | |
1037 | ||
1038 | if (!plane_state->fence) | |
e2330f07 DV |
1039 | continue; |
1040 | ||
f6ce410a GP |
1041 | WARN_ON(!plane_state->fb); |
1042 | ||
1043 | /* | |
1044 | * If waiting for fences pre-swap (ie: nonblock), userspace can | |
1045 | * still interrupt the operation. Instead of blocking until the | |
1046 | * timer expires, make the wait interruptible. | |
1047 | */ | |
f54d1867 | 1048 | ret = dma_fence_wait(plane_state->fence, pre_swap); |
f6ce410a GP |
1049 | if (ret) |
1050 | return ret; | |
e2330f07 | 1051 | |
f54d1867 | 1052 | dma_fence_put(plane_state->fence); |
f6ce410a | 1053 | plane_state->fence = NULL; |
e2330f07 | 1054 | } |
f6ce410a GP |
1055 | |
1056 | return 0; | |
e2330f07 | 1057 | } |
4c5b7f3a | 1058 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences); |
e2330f07 | 1059 | |
c240906d JK |
1060 | /** |
1061 | * drm_atomic_helper_framebuffer_changed - check if framebuffer has changed | |
1062 | * @dev: DRM device | |
1063 | * @old_state: atomic state object with old state structures | |
1064 | * @crtc: DRM crtc | |
1065 | * | |
1066 | * Checks whether the framebuffer used for this CRTC changes as a result of | |
1067 | * the atomic update. This is useful for drivers which cannot use | |
1068 | * drm_atomic_helper_wait_for_vblanks() and need to reimplement its | |
1069 | * functionality. | |
1070 | * | |
1071 | * Returns: | |
1072 | * true if the framebuffer changed. | |
1073 | */ | |
1074 | bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev, | |
1075 | struct drm_atomic_state *old_state, | |
1076 | struct drm_crtc *crtc) | |
ab58e338 DV |
1077 | { |
1078 | struct drm_plane *plane; | |
1079 | struct drm_plane_state *old_plane_state; | |
ab58e338 DV |
1080 | int i; |
1081 | ||
df63b999 | 1082 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
ab58e338 DV |
1083 | if (plane->state->crtc != crtc && |
1084 | old_plane_state->crtc != crtc) | |
1085 | continue; | |
1086 | ||
1087 | if (plane->state->fb != old_plane_state->fb) | |
1088 | return true; | |
1089 | } | |
1090 | ||
1091 | return false; | |
1092 | } | |
c240906d | 1093 | EXPORT_SYMBOL(drm_atomic_helper_framebuffer_changed); |
ab58e338 | 1094 | |
5ee3229c RC |
1095 | /** |
1096 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
1097 | * @dev: DRM device | |
1098 | * @old_state: atomic state object with old state structures | |
1099 | * | |
1100 | * Helper to, after atomic commit, wait for vblanks on all effected | |
1101 | * crtcs (ie. before cleaning up old framebuffers using | |
ab58e338 DV |
1102 | * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
1103 | * framebuffers have actually changed to optimize for the legacy cursor and | |
1104 | * plane update use-case. | |
5ee3229c RC |
1105 | */ |
1106 | void | |
1107 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
1108 | struct drm_atomic_state *old_state) | |
623369e5 DV |
1109 | { |
1110 | struct drm_crtc *crtc; | |
1111 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
1112 | int i, ret; |
1113 | ||
df63b999 | 1114 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
623369e5 DV |
1115 | /* No one cares about the old state, so abuse it for tracking |
1116 | * and store whether we hold a vblank reference (and should do a | |
1117 | * vblank wait) in the ->enable boolean. */ | |
1118 | old_crtc_state->enable = false; | |
1119 | ||
1120 | if (!crtc->state->enable) | |
1121 | continue; | |
1122 | ||
f02ad907 DV |
1123 | /* Legacy cursor ioctls are completely unsynced, and userspace |
1124 | * relies on that (by doing tons of cursor updates). */ | |
1125 | if (old_state->legacy_cursor_update) | |
1126 | continue; | |
1127 | ||
c240906d JK |
1128 | if (!drm_atomic_helper_framebuffer_changed(dev, |
1129 | old_state, crtc)) | |
ab58e338 DV |
1130 | continue; |
1131 | ||
623369e5 DV |
1132 | ret = drm_crtc_vblank_get(crtc); |
1133 | if (ret != 0) | |
1134 | continue; | |
1135 | ||
1136 | old_crtc_state->enable = true; | |
d4853630 | 1137 | old_crtc_state->last_vblank_count = drm_crtc_vblank_count(crtc); |
623369e5 DV |
1138 | } |
1139 | ||
df63b999 ACO |
1140 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
1141 | if (!old_crtc_state->enable) | |
623369e5 DV |
1142 | continue; |
1143 | ||
1144 | ret = wait_event_timeout(dev->vblank[i].queue, | |
1145 | old_crtc_state->last_vblank_count != | |
d4853630 | 1146 | drm_crtc_vblank_count(crtc), |
623369e5 DV |
1147 | msecs_to_jiffies(50)); |
1148 | ||
8d4d0d70 VS |
1149 | WARN(!ret, "[CRTC:%d] vblank wait timed out\n", crtc->base.id); |
1150 | ||
623369e5 DV |
1151 | drm_crtc_vblank_put(crtc); |
1152 | } | |
1153 | } | |
5ee3229c | 1154 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 DV |
1155 | |
1156 | /** | |
9f2a7950 | 1157 | * drm_atomic_helper_commit_tail - commit atomic update to hardware |
1ea0c02e | 1158 | * @old_state: atomic state object with old state structures |
623369e5 | 1159 | * |
9f2a7950 DV |
1160 | * This is the default implemenation for the ->atomic_commit_tail() hook of the |
1161 | * &drm_mode_config_helper_funcs vtable. | |
623369e5 | 1162 | * |
9f2a7950 DV |
1163 | * Note that the default ordering of how the various stages are called is to |
1164 | * match the legacy modeset helper library closest. One peculiarity of that is | |
1165 | * that it doesn't mesh well with runtime PM at all. | |
6e48ae32 | 1166 | * |
9f2a7950 | 1167 | * For drivers supporting runtime PM the recommended sequence is instead :: |
6e48ae32 | 1168 | * |
1ea0c02e | 1169 | * drm_atomic_helper_commit_modeset_disables(dev, old_state); |
6e48ae32 | 1170 | * |
1ea0c02e | 1171 | * drm_atomic_helper_commit_modeset_enables(dev, old_state); |
6e48ae32 | 1172 | * |
1ea0c02e | 1173 | * drm_atomic_helper_commit_planes(dev, old_state, |
2b58e98d | 1174 | * DRM_PLANE_COMMIT_ACTIVE_ONLY); |
6e48ae32 | 1175 | * |
9f2a7950 DV |
1176 | * for committing the atomic update to hardware. See the kerneldoc entries for |
1177 | * these three functions for more details. | |
1178 | */ | |
1ea0c02e | 1179 | void drm_atomic_helper_commit_tail(struct drm_atomic_state *old_state) |
9f2a7950 | 1180 | { |
1ea0c02e | 1181 | struct drm_device *dev = old_state->dev; |
9f2a7950 | 1182 | |
1ea0c02e | 1183 | drm_atomic_helper_commit_modeset_disables(dev, old_state); |
9f2a7950 | 1184 | |
1ea0c02e | 1185 | drm_atomic_helper_commit_planes(dev, old_state, 0); |
9f2a7950 | 1186 | |
1ea0c02e | 1187 | drm_atomic_helper_commit_modeset_enables(dev, old_state); |
9f2a7950 | 1188 | |
1ea0c02e | 1189 | drm_atomic_helper_commit_hw_done(old_state); |
9f2a7950 | 1190 | |
1ea0c02e | 1191 | drm_atomic_helper_wait_for_vblanks(dev, old_state); |
9f2a7950 | 1192 | |
1ea0c02e | 1193 | drm_atomic_helper_cleanup_planes(dev, old_state); |
9f2a7950 DV |
1194 | } |
1195 | EXPORT_SYMBOL(drm_atomic_helper_commit_tail); | |
1196 | ||
1ea0c02e | 1197 | static void commit_tail(struct drm_atomic_state *old_state) |
9f2a7950 | 1198 | { |
1ea0c02e | 1199 | struct drm_device *dev = old_state->dev; |
9f2a7950 DV |
1200 | struct drm_mode_config_helper_funcs *funcs; |
1201 | ||
1202 | funcs = dev->mode_config.helper_private; | |
1203 | ||
1ea0c02e | 1204 | drm_atomic_helper_wait_for_fences(dev, old_state, false); |
9f2a7950 | 1205 | |
1ea0c02e | 1206 | drm_atomic_helper_wait_for_dependencies(old_state); |
9f2a7950 DV |
1207 | |
1208 | if (funcs && funcs->atomic_commit_tail) | |
1ea0c02e | 1209 | funcs->atomic_commit_tail(old_state); |
9f2a7950 | 1210 | else |
1ea0c02e | 1211 | drm_atomic_helper_commit_tail(old_state); |
9f2a7950 | 1212 | |
1ea0c02e | 1213 | drm_atomic_helper_commit_cleanup_done(old_state); |
9f2a7950 | 1214 | |
1ea0c02e | 1215 | drm_atomic_state_put(old_state); |
9f2a7950 DV |
1216 | } |
1217 | ||
1218 | static void commit_work(struct work_struct *work) | |
1219 | { | |
1220 | struct drm_atomic_state *state = container_of(work, | |
1221 | struct drm_atomic_state, | |
1222 | commit_work); | |
1223 | commit_tail(state); | |
1224 | } | |
1225 | ||
1226 | /** | |
1227 | * drm_atomic_helper_commit - commit validated state object | |
1228 | * @dev: DRM device | |
1229 | * @state: the driver state object | |
1230 | * @nonblock: whether nonblocking behavior is requested. | |
1231 | * | |
1232 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
1233 | * object. This can still fail when e.g. the framebuffer reservation fails. This | |
1234 | * function implements nonblocking commits, using | |
1235 | * drm_atomic_helper_setup_commit() and related functions. | |
1236 | * | |
9f2a7950 DV |
1237 | * Committing the actual hardware state is done through the |
1238 | * ->atomic_commit_tail() callback of the &drm_mode_config_helper_funcs vtable, | |
1239 | * or it's default implementation drm_atomic_helper_commit_tail(). | |
6e48ae32 | 1240 | * |
c39032a8 | 1241 | * RETURNS: |
623369e5 DV |
1242 | * Zero for success or -errno. |
1243 | */ | |
1244 | int drm_atomic_helper_commit(struct drm_device *dev, | |
1245 | struct drm_atomic_state *state, | |
286dbb8d | 1246 | bool nonblock) |
623369e5 DV |
1247 | { |
1248 | int ret; | |
1249 | ||
a095caa7 DV |
1250 | ret = drm_atomic_helper_setup_commit(state, nonblock); |
1251 | if (ret) | |
1252 | return ret; | |
1253 | ||
9f2a7950 DV |
1254 | INIT_WORK(&state->commit_work, commit_work); |
1255 | ||
623369e5 DV |
1256 | ret = drm_atomic_helper_prepare_planes(dev, state); |
1257 | if (ret) | |
1258 | return ret; | |
1259 | ||
f6ce410a GP |
1260 | if (!nonblock) { |
1261 | ret = drm_atomic_helper_wait_for_fences(dev, state, true); | |
aebe55c2 LP |
1262 | if (ret) { |
1263 | drm_atomic_helper_cleanup_planes(dev, state); | |
f6ce410a | 1264 | return ret; |
aebe55c2 | 1265 | } |
f6ce410a GP |
1266 | } |
1267 | ||
623369e5 DV |
1268 | /* |
1269 | * This is the point of no return - everything below never fails except | |
1270 | * when the hw goes bonghits. Which means we can commit the new state on | |
1271 | * the software side now. | |
1272 | */ | |
1273 | ||
5e84c269 | 1274 | drm_atomic_helper_swap_state(state, true); |
623369e5 DV |
1275 | |
1276 | /* | |
1277 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 1278 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
1279 | * that the asynchronous work has either been cancelled (if the driver |
1280 | * supports it, which at least requires that the framebuffers get | |
1281 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
1282 | * before the new state gets committed on the software side with | |
1283 | * drm_atomic_helper_swap_state(). | |
1284 | * | |
1285 | * This scheme allows new atomic state updates to be prepared and | |
1286 | * checked in parallel to the asynchronous completion of the previous | |
1287 | * update. Which is important since compositors need to figure out the | |
1288 | * composition of the next frame right after having submitted the | |
1289 | * current layout. | |
9f2a7950 DV |
1290 | * |
1291 | * NOTE: Commit work has multiple phases, first hardware commit, then | |
1292 | * cleanup. We want them to overlap, hence need system_unbound_wq to | |
1293 | * make sure work items don't artifically stall on each another. | |
623369e5 DV |
1294 | */ |
1295 | ||
0853695c | 1296 | drm_atomic_state_get(state); |
9f2a7950 DV |
1297 | if (nonblock) |
1298 | queue_work(system_unbound_wq, &state->commit_work); | |
1299 | else | |
1300 | commit_tail(state); | |
623369e5 DV |
1301 | |
1302 | return 0; | |
1303 | } | |
1304 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1305 | ||
e8c833a7 | 1306 | /** |
286dbb8d | 1307 | * DOC: implementing nonblocking commit |
e8c833a7 | 1308 | * |
9f2a7950 | 1309 | * Nonblocking atomic commits have to be implemented in the following sequence: |
e8c833a7 DV |
1310 | * |
1311 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
1312 | * which commit needs to call which can fail, so we want to run it first and | |
1313 | * synchronously. | |
1314 | * | |
286dbb8d | 1315 | * 2. Synchronize with any outstanding nonblocking commit worker threads which |
e8c833a7 DV |
1316 | * might be affected the new state update. This can be done by either cancelling |
1317 | * or flushing the work items, depending upon whether the driver can deal with | |
1318 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
1319 | * cleanup is still done when cancelling. | |
1320 | * | |
9f2a7950 DV |
1321 | * Asynchronous workers need to have sufficient parallelism to be able to run |
1322 | * different atomic commits on different CRTCs in parallel. The simplest way to | |
1323 | * achive this is by running them on the &system_unbound_wq work queue. Note | |
1324 | * that drivers are not required to split up atomic commits and run an | |
1325 | * individual commit in parallel - userspace is supposed to do that if it cares. | |
1326 | * But it might be beneficial to do that for modesets, since those necessarily | |
1327 | * must be done as one global operation, and enabling or disabling a CRTC can | |
1328 | * take a long time. But even that is not required. | |
e8c833a7 DV |
1329 | * |
1330 | * 3. The software state is updated synchronously with | |
26196f7e | 1331 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
e8c833a7 | 1332 | * locks means concurrent callers never see inconsistent state. And doing this |
286dbb8d ML |
1333 | * while it's guaranteed that no relevant nonblocking worker runs means that |
1334 | * nonblocking workers do not need grab any locks. Actually they must not grab | |
1335 | * locks, for otherwise the work flushing will deadlock. | |
e8c833a7 DV |
1336 | * |
1337 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1338 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1339 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
1340 | * being displayed. | |
9f2a7950 DV |
1341 | * |
1342 | * The above scheme is implemented in the atomic helper libraries in | |
1343 | * drm_atomic_helper_commit() using a bunch of helper functions. See | |
1344 | * drm_atomic_helper_setup_commit() for a starting point. | |
e8c833a7 DV |
1345 | */ |
1346 | ||
a095caa7 DV |
1347 | static int stall_checks(struct drm_crtc *crtc, bool nonblock) |
1348 | { | |
1349 | struct drm_crtc_commit *commit, *stall_commit = NULL; | |
1350 | bool completed = true; | |
1351 | int i; | |
1352 | long ret = 0; | |
1353 | ||
1354 | spin_lock(&crtc->commit_lock); | |
1355 | i = 0; | |
1356 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) { | |
1357 | if (i == 0) { | |
1358 | completed = try_wait_for_completion(&commit->flip_done); | |
1359 | /* Userspace is not allowed to get ahead of the previous | |
1360 | * commit with nonblocking ones. */ | |
1361 | if (!completed && nonblock) { | |
1362 | spin_unlock(&crtc->commit_lock); | |
1363 | return -EBUSY; | |
1364 | } | |
1365 | } else if (i == 1) { | |
1366 | stall_commit = commit; | |
1367 | drm_crtc_commit_get(stall_commit); | |
a095caa7 | 1368 | break; |
723c3e55 | 1369 | } |
a095caa7 DV |
1370 | |
1371 | i++; | |
1372 | } | |
1373 | spin_unlock(&crtc->commit_lock); | |
1374 | ||
1375 | if (!stall_commit) | |
1376 | return 0; | |
1377 | ||
1378 | /* We don't want to let commits get ahead of cleanup work too much, | |
1379 | * stalling on 2nd previous commit means triple-buffer won't ever stall. | |
1380 | */ | |
723c3e55 | 1381 | ret = wait_for_completion_interruptible_timeout(&stall_commit->cleanup_done, |
a095caa7 DV |
1382 | 10*HZ); |
1383 | if (ret == 0) | |
1384 | DRM_ERROR("[CRTC:%d:%s] cleanup_done timed out\n", | |
1385 | crtc->base.id, crtc->name); | |
1386 | ||
1387 | drm_crtc_commit_put(stall_commit); | |
1388 | ||
1389 | return ret < 0 ? ret : 0; | |
1390 | } | |
1391 | ||
1392 | /** | |
1393 | * drm_atomic_helper_setup_commit - setup possibly nonblocking commit | |
1394 | * @state: new modeset state to be committed | |
1395 | * @nonblock: whether nonblocking behavior is requested. | |
1396 | * | |
1397 | * This function prepares @state to be used by the atomic helper's support for | |
1398 | * nonblocking commits. Drivers using the nonblocking commit infrastructure | |
1399 | * should always call this function from their ->atomic_commit hook. | |
1400 | * | |
1401 | * To be able to use this support drivers need to use a few more helper | |
1402 | * functions. drm_atomic_helper_wait_for_dependencies() must be called before | |
1403 | * actually committing the hardware state, and for nonblocking commits this call | |
1404 | * must be placed in the async worker. See also drm_atomic_helper_swap_state() | |
1405 | * and it's stall parameter, for when a driver's commit hooks look at the | |
1406 | * ->state pointers of struct &drm_crtc, &drm_plane or &drm_connector directly. | |
1407 | * | |
1408 | * Completion of the hardware commit step must be signalled using | |
1409 | * drm_atomic_helper_commit_hw_done(). After this step the driver is not allowed | |
1410 | * to read or change any permanent software or hardware modeset state. The only | |
1411 | * exception is state protected by other means than &drm_modeset_lock locks. | |
1412 | * Only the free standing @state with pointers to the old state structures can | |
1413 | * be inspected, e.g. to clean up old buffers using | |
1414 | * drm_atomic_helper_cleanup_planes(). | |
1415 | * | |
1416 | * At the very end, before cleaning up @state drivers must call | |
1417 | * drm_atomic_helper_commit_cleanup_done(). | |
1418 | * | |
1419 | * This is all implemented by in drm_atomic_helper_commit(), giving drivers a | |
1420 | * complete and esay-to-use default implementation of the atomic_commit() hook. | |
1421 | * | |
1422 | * The tracking of asynchronously executed and still pending commits is done | |
1423 | * using the core structure &drm_crtc_commit. | |
1424 | * | |
1425 | * By default there's no need to clean up resources allocated by this function | |
1426 | * explicitly: drm_atomic_state_default_clear() will take care of that | |
1427 | * automatically. | |
1428 | * | |
1429 | * Returns: | |
1430 | * | |
1431 | * 0 on success. -EBUSY when userspace schedules nonblocking commits too fast, | |
1432 | * -ENOMEM on allocation failures and -EINTR when a signal is pending. | |
1433 | */ | |
1434 | int drm_atomic_helper_setup_commit(struct drm_atomic_state *state, | |
1435 | bool nonblock) | |
1436 | { | |
1437 | struct drm_crtc *crtc; | |
1438 | struct drm_crtc_state *crtc_state; | |
1439 | struct drm_crtc_commit *commit; | |
1440 | int i, ret; | |
1441 | ||
1442 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1443 | commit = kzalloc(sizeof(*commit), GFP_KERNEL); | |
1444 | if (!commit) | |
1445 | return -ENOMEM; | |
1446 | ||
1447 | init_completion(&commit->flip_done); | |
1448 | init_completion(&commit->hw_done); | |
1449 | init_completion(&commit->cleanup_done); | |
1450 | INIT_LIST_HEAD(&commit->commit_entry); | |
1451 | kref_init(&commit->ref); | |
1452 | commit->crtc = crtc; | |
1453 | ||
1454 | state->crtcs[i].commit = commit; | |
1455 | ||
1456 | ret = stall_checks(crtc, nonblock); | |
1457 | if (ret) | |
1458 | return ret; | |
1459 | ||
1460 | /* Drivers only send out events when at least either current or | |
1461 | * new CRTC state is active. Complete right away if everything | |
1462 | * stays off. */ | |
1463 | if (!crtc->state->active && !crtc_state->active) { | |
1464 | complete_all(&commit->flip_done); | |
1465 | continue; | |
1466 | } | |
1467 | ||
1468 | /* Legacy cursor updates are fully unsynced. */ | |
1469 | if (state->legacy_cursor_update) { | |
1470 | complete_all(&commit->flip_done); | |
1471 | continue; | |
1472 | } | |
1473 | ||
1474 | if (!crtc_state->event) { | |
1475 | commit->event = kzalloc(sizeof(*commit->event), | |
1476 | GFP_KERNEL); | |
1477 | if (!commit->event) | |
1478 | return -ENOMEM; | |
1479 | ||
1480 | crtc_state->event = commit->event; | |
1481 | } | |
1482 | ||
1483 | crtc_state->event->base.completion = &commit->flip_done; | |
1484 | } | |
1485 | ||
1486 | return 0; | |
1487 | } | |
1488 | EXPORT_SYMBOL(drm_atomic_helper_setup_commit); | |
1489 | ||
1490 | ||
1491 | static struct drm_crtc_commit *preceeding_commit(struct drm_crtc *crtc) | |
1492 | { | |
1493 | struct drm_crtc_commit *commit; | |
1494 | int i = 0; | |
1495 | ||
1496 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) { | |
1497 | /* skip the first entry, that's the current commit */ | |
1498 | if (i == 1) | |
1499 | return commit; | |
1500 | i++; | |
1501 | } | |
1502 | ||
1503 | return NULL; | |
1504 | } | |
1505 | ||
1506 | /** | |
1507 | * drm_atomic_helper_wait_for_dependencies - wait for required preceeding commits | |
1ea0c02e | 1508 | * @old_state: atomic state object with old state structures |
a095caa7 DV |
1509 | * |
1510 | * This function waits for all preceeding commits that touch the same CRTC as | |
1ea0c02e | 1511 | * @old_state to both be committed to the hardware (as signalled by |
a095caa7 DV |
1512 | * drm_atomic_helper_commit_hw_done) and executed by the hardware (as signalled |
1513 | * by calling drm_crtc_vblank_send_event on the event member of | |
1514 | * &drm_crtc_state). | |
1515 | * | |
1516 | * This is part of the atomic helper support for nonblocking commits, see | |
1517 | * drm_atomic_helper_setup_commit() for an overview. | |
1518 | */ | |
1ea0c02e | 1519 | void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *old_state) |
a095caa7 DV |
1520 | { |
1521 | struct drm_crtc *crtc; | |
1522 | struct drm_crtc_state *crtc_state; | |
1523 | struct drm_crtc_commit *commit; | |
1524 | int i; | |
1525 | long ret; | |
1526 | ||
1ea0c02e | 1527 | for_each_crtc_in_state(old_state, crtc, crtc_state, i) { |
a095caa7 DV |
1528 | spin_lock(&crtc->commit_lock); |
1529 | commit = preceeding_commit(crtc); | |
1530 | if (commit) | |
1531 | drm_crtc_commit_get(commit); | |
1532 | spin_unlock(&crtc->commit_lock); | |
1533 | ||
1534 | if (!commit) | |
1535 | continue; | |
1536 | ||
1537 | ret = wait_for_completion_timeout(&commit->hw_done, | |
1538 | 10*HZ); | |
1539 | if (ret == 0) | |
1540 | DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n", | |
1541 | crtc->base.id, crtc->name); | |
1542 | ||
1543 | /* Currently no support for overwriting flips, hence | |
1544 | * stall for previous one to execute completely. */ | |
1545 | ret = wait_for_completion_timeout(&commit->flip_done, | |
1546 | 10*HZ); | |
1547 | if (ret == 0) | |
1548 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
1549 | crtc->base.id, crtc->name); | |
1550 | ||
1551 | drm_crtc_commit_put(commit); | |
1552 | } | |
1553 | } | |
1554 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies); | |
1555 | ||
1556 | /** | |
1557 | * drm_atomic_helper_commit_hw_done - setup possible nonblocking commit | |
1ea0c02e | 1558 | * @old_state: atomic state object with old state structures |
a095caa7 DV |
1559 | * |
1560 | * This function is used to signal completion of the hardware commit step. After | |
1561 | * this step the driver is not allowed to read or change any permanent software | |
1562 | * or hardware modeset state. The only exception is state protected by other | |
1563 | * means than &drm_modeset_lock locks. | |
1564 | * | |
1565 | * Drivers should try to postpone any expensive or delayed cleanup work after | |
1566 | * this function is called. | |
1567 | * | |
1568 | * This is part of the atomic helper support for nonblocking commits, see | |
1569 | * drm_atomic_helper_setup_commit() for an overview. | |
1570 | */ | |
1ea0c02e | 1571 | void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *old_state) |
a095caa7 DV |
1572 | { |
1573 | struct drm_crtc *crtc; | |
1574 | struct drm_crtc_state *crtc_state; | |
1575 | struct drm_crtc_commit *commit; | |
1576 | int i; | |
1577 | ||
1ea0c02e DV |
1578 | for_each_crtc_in_state(old_state, crtc, crtc_state, i) { |
1579 | commit = old_state->crtcs[i].commit; | |
a095caa7 DV |
1580 | if (!commit) |
1581 | continue; | |
1582 | ||
1583 | /* backend must have consumed any event by now */ | |
1584 | WARN_ON(crtc->state->event); | |
1585 | spin_lock(&crtc->commit_lock); | |
1586 | complete_all(&commit->hw_done); | |
1587 | spin_unlock(&crtc->commit_lock); | |
1588 | } | |
1589 | } | |
1590 | EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done); | |
1591 | ||
1592 | /** | |
1593 | * drm_atomic_helper_commit_cleanup_done - signal completion of commit | |
1ea0c02e | 1594 | * @old_state: atomic state object with old state structures |
a095caa7 | 1595 | * |
1ea0c02e DV |
1596 | * This signals completion of the atomic update @old_state, including any |
1597 | * cleanup work. If used, it must be called right before calling | |
0853695c | 1598 | * drm_atomic_state_put(). |
a095caa7 DV |
1599 | * |
1600 | * This is part of the atomic helper support for nonblocking commits, see | |
1601 | * drm_atomic_helper_setup_commit() for an overview. | |
1602 | */ | |
1ea0c02e | 1603 | void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *old_state) |
a095caa7 DV |
1604 | { |
1605 | struct drm_crtc *crtc; | |
1606 | struct drm_crtc_state *crtc_state; | |
1607 | struct drm_crtc_commit *commit; | |
1608 | int i; | |
1609 | long ret; | |
1610 | ||
1ea0c02e DV |
1611 | for_each_crtc_in_state(old_state, crtc, crtc_state, i) { |
1612 | commit = old_state->crtcs[i].commit; | |
a095caa7 DV |
1613 | if (WARN_ON(!commit)) |
1614 | continue; | |
1615 | ||
1616 | spin_lock(&crtc->commit_lock); | |
1617 | complete_all(&commit->cleanup_done); | |
1618 | WARN_ON(!try_wait_for_completion(&commit->hw_done)); | |
1619 | ||
1620 | /* commit_list borrows our reference, need to remove before we | |
1621 | * clean up our drm_atomic_state. But only after it actually | |
1622 | * completed, otherwise subsequent commits won't stall properly. */ | |
7deef7f1 DV |
1623 | if (try_wait_for_completion(&commit->flip_done)) |
1624 | goto del_commit; | |
a095caa7 DV |
1625 | |
1626 | spin_unlock(&crtc->commit_lock); | |
1627 | ||
1628 | /* We must wait for the vblank event to signal our completion | |
1629 | * before releasing our reference, since the vblank work does | |
1630 | * not hold a reference of its own. */ | |
1631 | ret = wait_for_completion_timeout(&commit->flip_done, | |
1632 | 10*HZ); | |
1633 | if (ret == 0) | |
1634 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
1635 | crtc->base.id, crtc->name); | |
1636 | ||
1637 | spin_lock(&crtc->commit_lock); | |
7deef7f1 | 1638 | del_commit: |
a095caa7 DV |
1639 | list_del(&commit->commit_entry); |
1640 | spin_unlock(&crtc->commit_lock); | |
1641 | } | |
1642 | } | |
1643 | EXPORT_SYMBOL(drm_atomic_helper_commit_cleanup_done); | |
1644 | ||
c2fcd274 | 1645 | /** |
2e3afd47 | 1646 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 1647 | * @dev: DRM device |
2e3afd47 | 1648 | * @state: atomic state object with new state structures |
c2fcd274 DV |
1649 | * |
1650 | * This function prepares plane state, specifically framebuffers, for the new | |
1651 | * configuration. If any failure is encountered this function will call | |
1652 | * ->cleanup_fb on any already successfully prepared framebuffer. | |
1653 | * | |
1654 | * Returns: | |
1655 | * 0 on success, negative error code on failure. | |
1656 | */ | |
1657 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
1658 | struct drm_atomic_state *state) | |
1659 | { | |
be9174a4 DV |
1660 | struct drm_plane *plane; |
1661 | struct drm_plane_state *plane_state; | |
1662 | int ret, i, j; | |
c2fcd274 | 1663 | |
be9174a4 | 1664 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 1665 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
1666 | |
1667 | funcs = plane->helper_private; | |
1668 | ||
fcc60b41 KP |
1669 | if (!drm_atomic_helper_framebuffer_changed(dev, state, plane_state->crtc)) |
1670 | continue; | |
1671 | ||
844f9111 ML |
1672 | if (funcs->prepare_fb) { |
1673 | ret = funcs->prepare_fb(plane, plane_state); | |
c2fcd274 DV |
1674 | if (ret) |
1675 | goto fail; | |
1676 | } | |
1677 | } | |
1678 | ||
1679 | return 0; | |
1680 | ||
1681 | fail: | |
be9174a4 | 1682 | for_each_plane_in_state(state, plane, plane_state, j) { |
b5ceff20 | 1683 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1684 | |
be9174a4 | 1685 | if (j >= i) |
c2fcd274 DV |
1686 | continue; |
1687 | ||
fcc60b41 KP |
1688 | if (!drm_atomic_helper_framebuffer_changed(dev, state, plane_state->crtc)) |
1689 | continue; | |
1690 | ||
c2fcd274 DV |
1691 | funcs = plane->helper_private; |
1692 | ||
844f9111 ML |
1693 | if (funcs->cleanup_fb) |
1694 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1695 | } |
1696 | ||
1697 | return ret; | |
1698 | } | |
1699 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
1700 | ||
7135ac54 | 1701 | static bool plane_crtc_active(const struct drm_plane_state *state) |
aef9dbb8 DV |
1702 | { |
1703 | return state->crtc && state->crtc->state->active; | |
1704 | } | |
1705 | ||
c2fcd274 DV |
1706 | /** |
1707 | * drm_atomic_helper_commit_planes - commit plane state | |
1708 | * @dev: DRM device | |
b0fcfc89 | 1709 | * @old_state: atomic state object with old state structures |
2b58e98d | 1710 | * @flags: flags for committing plane state |
c2fcd274 DV |
1711 | * |
1712 | * This function commits the new plane state using the plane and atomic helper | |
1713 | * functions for planes and crtcs. It assumes that the atomic state has already | |
1714 | * been pushed into the relevant object state pointers, since this step can no | |
1715 | * longer fail. | |
1716 | * | |
b0fcfc89 | 1717 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 | 1718 | * crtcs need to be updated though. |
de28d021 ML |
1719 | * |
1720 | * Note that this function does all plane updates across all CRTCs in one step. | |
1721 | * If the hardware can't support this approach look at | |
1722 | * drm_atomic_helper_commit_planes_on_crtc() instead. | |
6e48ae32 DV |
1723 | * |
1724 | * Plane parameters can be updated by applications while the associated CRTC is | |
1725 | * disabled. The DRM/KMS core will store the parameters in the plane state, | |
1726 | * which will be available to the driver when the CRTC is turned on. As a result | |
1727 | * most drivers don't need to be immediately notified of plane updates for a | |
1728 | * disabled CRTC. | |
1729 | * | |
2b58e98d LY |
1730 | * Unless otherwise needed, drivers are advised to set the ACTIVE_ONLY flag in |
1731 | * @flags in order not to receive plane update notifications related to a | |
1732 | * disabled CRTC. This avoids the need to manually ignore plane updates in | |
6e48ae32 DV |
1733 | * driver code when the driver and/or hardware can't or just don't need to deal |
1734 | * with updates on disabled CRTCs, for example when supporting runtime PM. | |
1735 | * | |
2b58e98d LY |
1736 | * Drivers may set the NO_DISABLE_AFTER_MODESET flag in @flags if the relevant |
1737 | * display controllers require to disable a CRTC's planes when the CRTC is | |
1738 | * disabled. This function would skip the ->atomic_disable call for a plane if | |
1739 | * the CRTC of the old plane state needs a modesetting operation. Of course, | |
1740 | * the drivers need to disable the planes in their CRTC disable callbacks | |
1741 | * since no one else would do that. | |
1742 | * | |
1743 | * The drm_atomic_helper_commit() default implementation doesn't set the | |
1744 | * ACTIVE_ONLY flag to most closely match the behaviour of the legacy helpers. | |
1745 | * This should not be copied blindly by drivers. | |
c2fcd274 DV |
1746 | */ |
1747 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
aef9dbb8 | 1748 | struct drm_atomic_state *old_state, |
2b58e98d | 1749 | uint32_t flags) |
c2fcd274 | 1750 | { |
df63b999 ACO |
1751 | struct drm_crtc *crtc; |
1752 | struct drm_crtc_state *old_crtc_state; | |
1753 | struct drm_plane *plane; | |
1754 | struct drm_plane_state *old_plane_state; | |
c2fcd274 | 1755 | int i; |
2b58e98d LY |
1756 | bool active_only = flags & DRM_PLANE_COMMIT_ACTIVE_ONLY; |
1757 | bool no_disable = flags & DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET; | |
c2fcd274 | 1758 | |
df63b999 | 1759 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1760 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1761 | |
1762 | funcs = crtc->helper_private; | |
1763 | ||
1764 | if (!funcs || !funcs->atomic_begin) | |
1765 | continue; | |
1766 | ||
aef9dbb8 DV |
1767 | if (active_only && !crtc->state->active) |
1768 | continue; | |
1769 | ||
613d2b27 | 1770 | funcs->atomic_begin(crtc, old_crtc_state); |
c2fcd274 DV |
1771 | } |
1772 | ||
df63b999 | 1773 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
b5ceff20 | 1774 | const struct drm_plane_helper_funcs *funcs; |
216c59d6 | 1775 | bool disabling; |
c2fcd274 DV |
1776 | |
1777 | funcs = plane->helper_private; | |
1778 | ||
3cad4b68 | 1779 | if (!funcs) |
c2fcd274 DV |
1780 | continue; |
1781 | ||
216c59d6 LP |
1782 | disabling = drm_atomic_plane_disabling(plane, old_plane_state); |
1783 | ||
1784 | if (active_only) { | |
1785 | /* | |
1786 | * Skip planes related to inactive CRTCs. If the plane | |
1787 | * is enabled use the state of the current CRTC. If the | |
1788 | * plane is being disabled use the state of the old | |
1789 | * CRTC to avoid skipping planes being disabled on an | |
1790 | * active CRTC. | |
1791 | */ | |
1792 | if (!disabling && !plane_crtc_active(plane->state)) | |
1793 | continue; | |
1794 | if (disabling && !plane_crtc_active(old_plane_state)) | |
1795 | continue; | |
1796 | } | |
aef9dbb8 | 1797 | |
407b8bd9 TR |
1798 | /* |
1799 | * Special-case disabling the plane if drivers support it. | |
1800 | */ | |
2b58e98d LY |
1801 | if (disabling && funcs->atomic_disable) { |
1802 | struct drm_crtc_state *crtc_state; | |
1803 | ||
1804 | crtc_state = old_plane_state->crtc->state; | |
1805 | ||
1806 | if (drm_atomic_crtc_needs_modeset(crtc_state) && | |
1807 | no_disable) | |
1808 | continue; | |
1809 | ||
407b8bd9 | 1810 | funcs->atomic_disable(plane, old_plane_state); |
2b58e98d | 1811 | } else if (plane->state->crtc || disabling) { |
407b8bd9 | 1812 | funcs->atomic_update(plane, old_plane_state); |
2b58e98d | 1813 | } |
c2fcd274 DV |
1814 | } |
1815 | ||
df63b999 | 1816 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1817 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1818 | |
1819 | funcs = crtc->helper_private; | |
1820 | ||
1821 | if (!funcs || !funcs->atomic_flush) | |
1822 | continue; | |
1823 | ||
aef9dbb8 DV |
1824 | if (active_only && !crtc->state->active) |
1825 | continue; | |
1826 | ||
613d2b27 | 1827 | funcs->atomic_flush(crtc, old_crtc_state); |
c2fcd274 DV |
1828 | } |
1829 | } | |
1830 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1831 | ||
de28d021 ML |
1832 | /** |
1833 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc | |
1834 | * @old_crtc_state: atomic state object with the old crtc state | |
1835 | * | |
1836 | * This function commits the new plane state using the plane and atomic helper | |
1837 | * functions for planes on the specific crtc. It assumes that the atomic state | |
1838 | * has already been pushed into the relevant object state pointers, since this | |
1839 | * step can no longer fail. | |
1840 | * | |
1841 | * This function is useful when plane updates should be done crtc-by-crtc | |
1842 | * instead of one global step like drm_atomic_helper_commit_planes() does. | |
1843 | * | |
1844 | * This function can only be savely used when planes are not allowed to move | |
1845 | * between different CRTCs because this function doesn't handle inter-CRTC | |
1846 | * depencies. Callers need to ensure that either no such depencies exist, | |
1847 | * resolve them through ordering of commit calls or through some other means. | |
1848 | */ | |
1849 | void | |
1850 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) | |
1851 | { | |
1852 | const struct drm_crtc_helper_funcs *crtc_funcs; | |
1853 | struct drm_crtc *crtc = old_crtc_state->crtc; | |
1854 | struct drm_atomic_state *old_state = old_crtc_state->state; | |
1855 | struct drm_plane *plane; | |
1856 | unsigned plane_mask; | |
1857 | ||
1858 | plane_mask = old_crtc_state->plane_mask; | |
1859 | plane_mask |= crtc->state->plane_mask; | |
1860 | ||
1861 | crtc_funcs = crtc->helper_private; | |
1862 | if (crtc_funcs && crtc_funcs->atomic_begin) | |
613d2b27 | 1863 | crtc_funcs->atomic_begin(crtc, old_crtc_state); |
de28d021 ML |
1864 | |
1865 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { | |
1866 | struct drm_plane_state *old_plane_state = | |
1867 | drm_atomic_get_existing_plane_state(old_state, plane); | |
1868 | const struct drm_plane_helper_funcs *plane_funcs; | |
1869 | ||
1870 | plane_funcs = plane->helper_private; | |
1871 | ||
1872 | if (!old_plane_state || !plane_funcs) | |
1873 | continue; | |
1874 | ||
1875 | WARN_ON(plane->state->crtc && plane->state->crtc != crtc); | |
1876 | ||
1877 | if (drm_atomic_plane_disabling(plane, old_plane_state) && | |
1878 | plane_funcs->atomic_disable) | |
1879 | plane_funcs->atomic_disable(plane, old_plane_state); | |
1880 | else if (plane->state->crtc || | |
1881 | drm_atomic_plane_disabling(plane, old_plane_state)) | |
1882 | plane_funcs->atomic_update(plane, old_plane_state); | |
1883 | } | |
1884 | ||
1885 | if (crtc_funcs && crtc_funcs->atomic_flush) | |
613d2b27 | 1886 | crtc_funcs->atomic_flush(crtc, old_crtc_state); |
de28d021 ML |
1887 | } |
1888 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); | |
1889 | ||
6753ba97 JS |
1890 | /** |
1891 | * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes | |
28500291 | 1892 | * @old_crtc_state: atomic state object with the old CRTC state |
6753ba97 JS |
1893 | * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks |
1894 | * | |
1895 | * Disables all planes associated with the given CRTC. This can be | |
28500291 LY |
1896 | * used for instance in the CRTC helper atomic_disable callback to disable |
1897 | * all planes. | |
6753ba97 JS |
1898 | * |
1899 | * If the atomic-parameter is set the function calls the CRTC's | |
1900 | * atomic_begin hook before and atomic_flush hook after disabling the | |
1901 | * planes. | |
1902 | * | |
1903 | * It is a bug to call this function without having implemented the | |
1904 | * ->atomic_disable() plane hook. | |
1905 | */ | |
28500291 LY |
1906 | void |
1907 | drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state, | |
1908 | bool atomic) | |
6753ba97 | 1909 | { |
28500291 | 1910 | struct drm_crtc *crtc = old_crtc_state->crtc; |
6753ba97 JS |
1911 | const struct drm_crtc_helper_funcs *crtc_funcs = |
1912 | crtc->helper_private; | |
1913 | struct drm_plane *plane; | |
1914 | ||
1915 | if (atomic && crtc_funcs && crtc_funcs->atomic_begin) | |
1916 | crtc_funcs->atomic_begin(crtc, NULL); | |
1917 | ||
28500291 | 1918 | drm_atomic_crtc_state_for_each_plane(plane, old_crtc_state) { |
6753ba97 JS |
1919 | const struct drm_plane_helper_funcs *plane_funcs = |
1920 | plane->helper_private; | |
1921 | ||
28500291 | 1922 | if (!plane_funcs) |
6753ba97 JS |
1923 | continue; |
1924 | ||
1925 | WARN_ON(!plane_funcs->atomic_disable); | |
1926 | if (plane_funcs->atomic_disable) | |
1927 | plane_funcs->atomic_disable(plane, NULL); | |
1928 | } | |
1929 | ||
1930 | if (atomic && crtc_funcs && crtc_funcs->atomic_flush) | |
1931 | crtc_funcs->atomic_flush(crtc, NULL); | |
1932 | } | |
1933 | EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); | |
1934 | ||
c2fcd274 DV |
1935 | /** |
1936 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1937 | * @dev: DRM device | |
1938 | * @old_state: atomic state object with old state structures | |
1939 | * | |
1940 | * This function cleans up plane state, specifically framebuffers, from the old | |
1941 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1942 | * be able to call this function. | |
1943 | * | |
1944 | * This function must also be called on the new state when the atomic update | |
1945 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1946 | */ | |
1947 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1948 | struct drm_atomic_state *old_state) | |
1949 | { | |
df63b999 ACO |
1950 | struct drm_plane *plane; |
1951 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
1952 | int i; |
1953 | ||
df63b999 | 1954 | for_each_plane_in_state(old_state, plane, plane_state, i) { |
b5ceff20 | 1955 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1956 | |
fcc60b41 KP |
1957 | if (!drm_atomic_helper_framebuffer_changed(dev, old_state, plane_state->crtc)) |
1958 | continue; | |
1959 | ||
c2fcd274 DV |
1960 | funcs = plane->helper_private; |
1961 | ||
844f9111 ML |
1962 | if (funcs->cleanup_fb) |
1963 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1964 | } |
1965 | } | |
1966 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1967 | ||
1968 | /** | |
1969 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
c2fcd274 | 1970 | * @state: atomic state |
5e84c269 | 1971 | * @stall: stall for proceeding commits |
c2fcd274 DV |
1972 | * |
1973 | * This function stores the atomic state into the current state pointers in all | |
1974 | * driver objects. It should be called after all failing steps have been done | |
1975 | * and succeeded, but before the actual hardware state is committed. | |
1976 | * | |
1977 | * For cleanup and error recovery the current state for all changed objects will | |
1978 | * be swaped into @state. | |
1979 | * | |
1980 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1981 | * | |
1982 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1983 | * | |
1984 | * 2. Do any other steps that might fail. | |
1985 | * | |
1986 | * 3. Put the staged state into the current state pointers with this function. | |
1987 | * | |
1988 | * 4. Actually commit the hardware state. | |
1989 | * | |
26196f7e | 1990 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
c2fcd274 | 1991 | * contains the old state. Also do any other cleanup required with that state. |
a095caa7 DV |
1992 | * |
1993 | * @stall must be set when nonblocking commits for this driver directly access | |
1994 | * the ->state pointer of &drm_plane, &drm_crtc or &drm_connector. With the | |
1995 | * current atomic helpers this is almost always the case, since the helpers | |
1996 | * don't pass the right state structures to the callbacks. | |
c2fcd274 | 1997 | */ |
5e84c269 DV |
1998 | void drm_atomic_helper_swap_state(struct drm_atomic_state *state, |
1999 | bool stall) | |
c2fcd274 DV |
2000 | { |
2001 | int i; | |
a095caa7 | 2002 | long ret; |
be9174a4 DV |
2003 | struct drm_connector *connector; |
2004 | struct drm_connector_state *conn_state; | |
2005 | struct drm_crtc *crtc; | |
2006 | struct drm_crtc_state *crtc_state; | |
2007 | struct drm_plane *plane; | |
2008 | struct drm_plane_state *plane_state; | |
a095caa7 DV |
2009 | struct drm_crtc_commit *commit; |
2010 | ||
2011 | if (stall) { | |
2012 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
2013 | spin_lock(&crtc->commit_lock); | |
2014 | commit = list_first_entry_or_null(&crtc->commit_list, | |
2015 | struct drm_crtc_commit, commit_entry); | |
2016 | if (commit) | |
2017 | drm_crtc_commit_get(commit); | |
2018 | spin_unlock(&crtc->commit_lock); | |
2019 | ||
2020 | if (!commit) | |
2021 | continue; | |
2022 | ||
2023 | ret = wait_for_completion_timeout(&commit->hw_done, | |
2024 | 10*HZ); | |
2025 | if (ret == 0) | |
2026 | DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n", | |
2027 | crtc->base.id, crtc->name); | |
2028 | drm_crtc_commit_put(commit); | |
2029 | } | |
2030 | } | |
c2fcd274 | 2031 | |
be9174a4 | 2032 | for_each_connector_in_state(state, connector, conn_state, i) { |
c2fcd274 | 2033 | connector->state->state = state; |
63e83c1d | 2034 | swap(state->connectors[i].state, connector->state); |
c2fcd274 DV |
2035 | connector->state->state = NULL; |
2036 | } | |
2037 | ||
be9174a4 | 2038 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
c2fcd274 | 2039 | crtc->state->state = state; |
5d943aa6 | 2040 | swap(state->crtcs[i].state, crtc->state); |
c2fcd274 | 2041 | crtc->state->state = NULL; |
a095caa7 DV |
2042 | |
2043 | if (state->crtcs[i].commit) { | |
2044 | spin_lock(&crtc->commit_lock); | |
2045 | list_add(&state->crtcs[i].commit->commit_entry, | |
2046 | &crtc->commit_list); | |
2047 | spin_unlock(&crtc->commit_lock); | |
2048 | ||
2049 | state->crtcs[i].commit->event = NULL; | |
2050 | } | |
c2fcd274 DV |
2051 | } |
2052 | ||
be9174a4 | 2053 | for_each_plane_in_state(state, plane, plane_state, i) { |
c2fcd274 | 2054 | plane->state->state = state; |
b8b5342b | 2055 | swap(state->planes[i].state, plane->state); |
c2fcd274 DV |
2056 | plane->state->state = NULL; |
2057 | } | |
2058 | } | |
2059 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
2060 | |
2061 | /** | |
2062 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
2063 | * @plane: plane object to update | |
2064 | * @crtc: owning CRTC of owning plane | |
2065 | * @fb: framebuffer to flip onto plane | |
2066 | * @crtc_x: x offset of primary plane on crtc | |
2067 | * @crtc_y: y offset of primary plane on crtc | |
2068 | * @crtc_w: width of primary plane rectangle on crtc | |
2069 | * @crtc_h: height of primary plane rectangle on crtc | |
2070 | * @src_x: x offset of @fb for panning | |
2071 | * @src_y: y offset of @fb for panning | |
2072 | * @src_w: width of source rectangle in @fb | |
2073 | * @src_h: height of source rectangle in @fb | |
2074 | * | |
2075 | * Provides a default plane update handler using the atomic driver interface. | |
2076 | * | |
2077 | * RETURNS: | |
2078 | * Zero on success, error code on failure | |
2079 | */ | |
2080 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
2081 | struct drm_crtc *crtc, | |
2082 | struct drm_framebuffer *fb, | |
2083 | int crtc_x, int crtc_y, | |
2084 | unsigned int crtc_w, unsigned int crtc_h, | |
2085 | uint32_t src_x, uint32_t src_y, | |
2086 | uint32_t src_w, uint32_t src_h) | |
2087 | { | |
2088 | struct drm_atomic_state *state; | |
2089 | struct drm_plane_state *plane_state; | |
2090 | int ret = 0; | |
2091 | ||
2092 | state = drm_atomic_state_alloc(plane->dev); | |
2093 | if (!state) | |
2094 | return -ENOMEM; | |
2095 | ||
2096 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2097 | retry: | |
2098 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2099 | if (IS_ERR(plane_state)) { | |
2100 | ret = PTR_ERR(plane_state); | |
2101 | goto fail; | |
2102 | } | |
2103 | ||
07cc0ef6 | 2104 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
2105 | if (ret != 0) |
2106 | goto fail; | |
321ebf04 | 2107 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
2108 | plane_state->crtc_x = crtc_x; |
2109 | plane_state->crtc_y = crtc_y; | |
042652ed | 2110 | plane_state->crtc_w = crtc_w; |
02e6f379 | 2111 | plane_state->crtc_h = crtc_h; |
042652ed DV |
2112 | plane_state->src_x = src_x; |
2113 | plane_state->src_y = src_y; | |
042652ed | 2114 | plane_state->src_w = src_w; |
02e6f379 | 2115 | plane_state->src_h = src_h; |
042652ed | 2116 | |
3671c580 DV |
2117 | if (plane == crtc->cursor) |
2118 | state->legacy_cursor_update = true; | |
2119 | ||
042652ed | 2120 | ret = drm_atomic_commit(state); |
042652ed DV |
2121 | fail: |
2122 | if (ret == -EDEADLK) | |
2123 | goto backoff; | |
2124 | ||
0853695c | 2125 | drm_atomic_state_put(state); |
042652ed | 2126 | return ret; |
0853695c | 2127 | |
042652ed | 2128 | backoff: |
042652ed | 2129 | drm_atomic_state_clear(state); |
6f75cea6 | 2130 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2131 | |
2132 | /* | |
2133 | * Someone might have exchanged the framebuffer while we dropped locks | |
2134 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2135 | * core does for us. | |
2136 | */ | |
2137 | plane->old_fb = plane->fb; | |
2138 | ||
2139 | goto retry; | |
2140 | } | |
2141 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
2142 | ||
2143 | /** | |
2144 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
2145 | * @plane: plane to disable | |
2146 | * | |
2147 | * Provides a default plane disable handler using the atomic driver interface. | |
2148 | * | |
2149 | * RETURNS: | |
2150 | * Zero on success, error code on failure | |
2151 | */ | |
2152 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
2153 | { | |
2154 | struct drm_atomic_state *state; | |
2155 | struct drm_plane_state *plane_state; | |
2156 | int ret = 0; | |
2157 | ||
aa54e2ee JSP |
2158 | /* |
2159 | * FIXME: Without plane->crtc set we can't get at the implicit legacy | |
2160 | * acquire context. The real fix will be to wire the acquire ctx through | |
2161 | * everywhere we need it, but meanwhile prevent chaos by just skipping | |
2162 | * this noop. The critical case is the cursor ioctls which a) only grab | |
2163 | * crtc/cursor-plane locks (so we need the crtc to get at the right | |
2164 | * acquire context) and b) can try to disable the plane multiple times. | |
2165 | */ | |
2166 | if (!plane->crtc) | |
2167 | return 0; | |
2168 | ||
042652ed DV |
2169 | state = drm_atomic_state_alloc(plane->dev); |
2170 | if (!state) | |
2171 | return -ENOMEM; | |
2172 | ||
2173 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
2174 | retry: | |
2175 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2176 | if (IS_ERR(plane_state)) { | |
2177 | ret = PTR_ERR(plane_state); | |
2178 | goto fail; | |
2179 | } | |
2180 | ||
24e79d0d ML |
2181 | if (plane_state->crtc && (plane == plane->crtc->cursor)) |
2182 | plane_state->state->legacy_cursor_update = true; | |
2183 | ||
bbb1e524 | 2184 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
042652ed DV |
2185 | if (ret != 0) |
2186 | goto fail; | |
f02ad907 | 2187 | |
042652ed | 2188 | ret = drm_atomic_commit(state); |
042652ed DV |
2189 | fail: |
2190 | if (ret == -EDEADLK) | |
2191 | goto backoff; | |
2192 | ||
0853695c | 2193 | drm_atomic_state_put(state); |
042652ed | 2194 | return ret; |
0853695c | 2195 | |
042652ed | 2196 | backoff: |
042652ed | 2197 | drm_atomic_state_clear(state); |
6f75cea6 | 2198 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2199 | |
2200 | /* | |
2201 | * Someone might have exchanged the framebuffer while we dropped locks | |
2202 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2203 | * core does for us. | |
2204 | */ | |
2205 | plane->old_fb = plane->fb; | |
2206 | ||
2207 | goto retry; | |
2208 | } | |
2209 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
2210 | ||
bbb1e524 RC |
2211 | /* just used from fb-helper and atomic-helper: */ |
2212 | int __drm_atomic_helper_disable_plane(struct drm_plane *plane, | |
2213 | struct drm_plane_state *plane_state) | |
2214 | { | |
2215 | int ret; | |
2216 | ||
2217 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
2218 | if (ret != 0) | |
2219 | return ret; | |
2220 | ||
2221 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
2222 | plane_state->crtc_x = 0; | |
2223 | plane_state->crtc_y = 0; | |
bbb1e524 | 2224 | plane_state->crtc_w = 0; |
02e6f379 | 2225 | plane_state->crtc_h = 0; |
bbb1e524 RC |
2226 | plane_state->src_x = 0; |
2227 | plane_state->src_y = 0; | |
bbb1e524 | 2228 | plane_state->src_w = 0; |
02e6f379 | 2229 | plane_state->src_h = 0; |
bbb1e524 | 2230 | |
bbb1e524 RC |
2231 | return 0; |
2232 | } | |
2233 | ||
042652ed DV |
2234 | static int update_output_state(struct drm_atomic_state *state, |
2235 | struct drm_mode_set *set) | |
2236 | { | |
2237 | struct drm_device *dev = set->crtc->dev; | |
df63b999 ACO |
2238 | struct drm_crtc *crtc; |
2239 | struct drm_crtc_state *crtc_state; | |
2240 | struct drm_connector *connector; | |
042652ed | 2241 | struct drm_connector_state *conn_state; |
6ab520a2 | 2242 | int ret, i; |
042652ed DV |
2243 | |
2244 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
2245 | state->acquire_ctx); | |
2246 | if (ret) | |
2247 | return ret; | |
2248 | ||
6ab520a2 ML |
2249 | /* First disable all connectors on the target crtc. */ |
2250 | ret = drm_atomic_add_affected_connectors(state, set->crtc); | |
2251 | if (ret) | |
2252 | return ret; | |
042652ed | 2253 | |
df63b999 | 2254 | for_each_connector_in_state(state, connector, conn_state, i) { |
042652ed DV |
2255 | if (conn_state->crtc == set->crtc) { |
2256 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
2257 | NULL); | |
2258 | if (ret) | |
2259 | return ret; | |
2260 | } | |
6ab520a2 | 2261 | } |
042652ed | 2262 | |
6ab520a2 ML |
2263 | /* Then set all connectors from set->connectors on the target crtc */ |
2264 | for (i = 0; i < set->num_connectors; i++) { | |
2265 | conn_state = drm_atomic_get_connector_state(state, | |
2266 | set->connectors[i]); | |
2267 | if (IS_ERR(conn_state)) | |
2268 | return PTR_ERR(conn_state); | |
2269 | ||
2270 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
2271 | set->crtc); | |
2272 | if (ret) | |
2273 | return ret; | |
042652ed DV |
2274 | } |
2275 | ||
df63b999 | 2276 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
2277 | /* Don't update ->enable for the CRTC in the set_config request, |
2278 | * since a mismatch would indicate a bug in the upper layers. | |
2279 | * The actual modeset code later on will catch any | |
2280 | * inconsistencies here. */ | |
2281 | if (crtc == set->crtc) | |
2282 | continue; | |
2283 | ||
14de6c44 | 2284 | if (!crtc_state->connector_mask) { |
c30f55a7 LP |
2285 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, |
2286 | NULL); | |
2287 | if (ret < 0) | |
2288 | return ret; | |
2289 | ||
9b5edbf7 | 2290 | crtc_state->active = false; |
c30f55a7 | 2291 | } |
042652ed DV |
2292 | } |
2293 | ||
2294 | return 0; | |
2295 | } | |
2296 | ||
2297 | /** | |
2298 | * drm_atomic_helper_set_config - set a new config from userspace | |
2299 | * @set: mode set configuration | |
2300 | * | |
2301 | * Provides a default crtc set_config handler using the atomic driver interface. | |
2302 | * | |
2303 | * Returns: | |
2304 | * Returns 0 on success, negative errno numbers on failure. | |
2305 | */ | |
2306 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
2307 | { | |
2308 | struct drm_atomic_state *state; | |
2309 | struct drm_crtc *crtc = set->crtc; | |
042652ed DV |
2310 | int ret = 0; |
2311 | ||
2312 | state = drm_atomic_state_alloc(crtc->dev); | |
2313 | if (!state) | |
2314 | return -ENOMEM; | |
2315 | ||
40616a26 | 2316 | state->legacy_set_config = true; |
042652ed DV |
2317 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); |
2318 | retry: | |
bbb1e524 RC |
2319 | ret = __drm_atomic_helper_set_config(set, state); |
2320 | if (ret != 0) | |
042652ed | 2321 | goto fail; |
042652ed | 2322 | |
bbb1e524 | 2323 | ret = drm_atomic_commit(state); |
bbb1e524 RC |
2324 | fail: |
2325 | if (ret == -EDEADLK) | |
2326 | goto backoff; | |
2327 | ||
0853695c | 2328 | drm_atomic_state_put(state); |
bbb1e524 | 2329 | return ret; |
0853695c | 2330 | |
bbb1e524 RC |
2331 | backoff: |
2332 | drm_atomic_state_clear(state); | |
2333 | drm_atomic_legacy_backoff(state); | |
2334 | ||
2335 | /* | |
2336 | * Someone might have exchanged the framebuffer while we dropped locks | |
2337 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2338 | * core does for us. | |
2339 | */ | |
2340 | crtc->primary->old_fb = crtc->primary->fb; | |
2341 | ||
2342 | goto retry; | |
2343 | } | |
2344 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
2345 | ||
2346 | /* just used from fb-helper and atomic-helper: */ | |
2347 | int __drm_atomic_helper_set_config(struct drm_mode_set *set, | |
2348 | struct drm_atomic_state *state) | |
2349 | { | |
2350 | struct drm_crtc_state *crtc_state; | |
2351 | struct drm_plane_state *primary_state; | |
2352 | struct drm_crtc *crtc = set->crtc; | |
83926117 | 2353 | int hdisplay, vdisplay; |
bbb1e524 RC |
2354 | int ret; |
2355 | ||
2356 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2357 | if (IS_ERR(crtc_state)) | |
2358 | return PTR_ERR(crtc_state); | |
2359 | ||
2360 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); | |
2361 | if (IS_ERR(primary_state)) | |
2362 | return PTR_ERR(primary_state); | |
e5b5341c | 2363 | |
042652ed DV |
2364 | if (!set->mode) { |
2365 | WARN_ON(set->fb); | |
2366 | WARN_ON(set->num_connectors); | |
2367 | ||
819364da DS |
2368 | ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); |
2369 | if (ret != 0) | |
bbb1e524 | 2370 | return ret; |
819364da | 2371 | |
eab3bbef | 2372 | crtc_state->active = false; |
e5b5341c | 2373 | |
07cc0ef6 | 2374 | ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
e5b5341c | 2375 | if (ret != 0) |
bbb1e524 | 2376 | return ret; |
e5b5341c RC |
2377 | |
2378 | drm_atomic_set_fb_for_plane(primary_state, NULL); | |
2379 | ||
042652ed DV |
2380 | goto commit; |
2381 | } | |
2382 | ||
2383 | WARN_ON(!set->fb); | |
2384 | WARN_ON(!set->num_connectors); | |
2385 | ||
819364da DS |
2386 | ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); |
2387 | if (ret != 0) | |
bbb1e524 | 2388 | return ret; |
819364da | 2389 | |
eab3bbef | 2390 | crtc_state->active = true; |
042652ed | 2391 | |
07cc0ef6 | 2392 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
042652ed | 2393 | if (ret != 0) |
bbb1e524 RC |
2394 | return ret; |
2395 | ||
83926117 VS |
2396 | drm_crtc_get_hv_timing(set->mode, &hdisplay, &vdisplay); |
2397 | ||
321ebf04 | 2398 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
042652ed DV |
2399 | primary_state->crtc_x = 0; |
2400 | primary_state->crtc_y = 0; | |
83926117 | 2401 | primary_state->crtc_w = hdisplay; |
02e6f379 | 2402 | primary_state->crtc_h = vdisplay; |
042652ed DV |
2403 | primary_state->src_x = set->x << 16; |
2404 | primary_state->src_y = set->y << 16; | |
bd2ef25d | 2405 | if (drm_rotation_90_or_270(primary_state->rotation)) { |
83926117 | 2406 | primary_state->src_w = vdisplay << 16; |
02e6f379 | 2407 | primary_state->src_h = hdisplay << 16; |
41121248 | 2408 | } else { |
83926117 | 2409 | primary_state->src_w = hdisplay << 16; |
02e6f379 | 2410 | primary_state->src_h = vdisplay << 16; |
41121248 | 2411 | } |
042652ed DV |
2412 | |
2413 | commit: | |
2414 | ret = update_output_state(state, set); | |
2415 | if (ret) | |
bbb1e524 | 2416 | return ret; |
042652ed | 2417 | |
042652ed | 2418 | return 0; |
042652ed | 2419 | } |
042652ed | 2420 | |
14942760 TR |
2421 | /** |
2422 | * drm_atomic_helper_disable_all - disable all currently active outputs | |
2423 | * @dev: DRM device | |
2424 | * @ctx: lock acquisition context | |
2425 | * | |
2426 | * Loops through all connectors, finding those that aren't turned off and then | |
2427 | * turns them off by setting their DPMS mode to OFF and deactivating the CRTC | |
2428 | * that they are connected to. | |
2429 | * | |
2430 | * This is used for example in suspend/resume to disable all currently active | |
2431 | * functions when suspending. | |
2432 | * | |
2433 | * Note that if callers haven't already acquired all modeset locks this might | |
2434 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
2435 | * | |
2436 | * Returns: | |
2437 | * 0 on success or a negative error code on failure. | |
2438 | * | |
2439 | * See also: | |
2440 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
2441 | */ | |
2442 | int drm_atomic_helper_disable_all(struct drm_device *dev, | |
2443 | struct drm_modeset_acquire_ctx *ctx) | |
2444 | { | |
2445 | struct drm_atomic_state *state; | |
2446 | struct drm_connector *conn; | |
2447 | int err; | |
2448 | ||
2449 | state = drm_atomic_state_alloc(dev); | |
2450 | if (!state) | |
2451 | return -ENOMEM; | |
2452 | ||
2453 | state->acquire_ctx = ctx; | |
2454 | ||
2455 | drm_for_each_connector(conn, dev) { | |
2456 | struct drm_crtc *crtc = conn->state->crtc; | |
2457 | struct drm_crtc_state *crtc_state; | |
2458 | ||
2459 | if (!crtc || conn->dpms != DRM_MODE_DPMS_ON) | |
2460 | continue; | |
2461 | ||
2462 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2463 | if (IS_ERR(crtc_state)) { | |
2464 | err = PTR_ERR(crtc_state); | |
2465 | goto free; | |
2466 | } | |
2467 | ||
2468 | crtc_state->active = false; | |
2469 | } | |
2470 | ||
2471 | err = drm_atomic_commit(state); | |
14942760 | 2472 | free: |
0853695c | 2473 | drm_atomic_state_put(state); |
14942760 TR |
2474 | return err; |
2475 | } | |
2476 | EXPORT_SYMBOL(drm_atomic_helper_disable_all); | |
2477 | ||
2478 | /** | |
2479 | * drm_atomic_helper_suspend - subsystem-level suspend helper | |
2480 | * @dev: DRM device | |
2481 | * | |
2482 | * Duplicates the current atomic state, disables all active outputs and then | |
2483 | * returns a pointer to the original atomic state to the caller. Drivers can | |
2484 | * pass this pointer to the drm_atomic_helper_resume() helper upon resume to | |
2485 | * restore the output configuration that was active at the time the system | |
2486 | * entered suspend. | |
2487 | * | |
2488 | * Note that it is potentially unsafe to use this. The atomic state object | |
2489 | * returned by this function is assumed to be persistent. Drivers must ensure | |
2490 | * that this holds true. Before calling this function, drivers must make sure | |
2491 | * to suspend fbdev emulation so that nothing can be using the device. | |
2492 | * | |
2493 | * Returns: | |
2494 | * A pointer to a copy of the state before suspend on success or an ERR_PTR()- | |
2495 | * encoded error code on failure. Drivers should store the returned atomic | |
2496 | * state object and pass it to the drm_atomic_helper_resume() helper upon | |
2497 | * resume. | |
2498 | * | |
2499 | * See also: | |
2500 | * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), | |
2501 | * drm_atomic_helper_resume() | |
2502 | */ | |
2503 | struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) | |
2504 | { | |
2505 | struct drm_modeset_acquire_ctx ctx; | |
2506 | struct drm_atomic_state *state; | |
2507 | int err; | |
2508 | ||
2509 | drm_modeset_acquire_init(&ctx, 0); | |
2510 | ||
2511 | retry: | |
2512 | err = drm_modeset_lock_all_ctx(dev, &ctx); | |
2513 | if (err < 0) { | |
2514 | state = ERR_PTR(err); | |
2515 | goto unlock; | |
2516 | } | |
2517 | ||
2518 | state = drm_atomic_helper_duplicate_state(dev, &ctx); | |
2519 | if (IS_ERR(state)) | |
2520 | goto unlock; | |
2521 | ||
2522 | err = drm_atomic_helper_disable_all(dev, &ctx); | |
2523 | if (err < 0) { | |
0853695c | 2524 | drm_atomic_state_put(state); |
14942760 TR |
2525 | state = ERR_PTR(err); |
2526 | goto unlock; | |
2527 | } | |
2528 | ||
2529 | unlock: | |
2530 | if (PTR_ERR(state) == -EDEADLK) { | |
2531 | drm_modeset_backoff(&ctx); | |
2532 | goto retry; | |
2533 | } | |
2534 | ||
2535 | drm_modeset_drop_locks(&ctx); | |
2536 | drm_modeset_acquire_fini(&ctx); | |
2537 | return state; | |
2538 | } | |
2539 | EXPORT_SYMBOL(drm_atomic_helper_suspend); | |
2540 | ||
2541 | /** | |
2542 | * drm_atomic_helper_resume - subsystem-level resume helper | |
2543 | * @dev: DRM device | |
2544 | * @state: atomic state to resume to | |
2545 | * | |
2546 | * Calls drm_mode_config_reset() to synchronize hardware and software states, | |
2547 | * grabs all modeset locks and commits the atomic state object. This can be | |
2548 | * used in conjunction with the drm_atomic_helper_suspend() helper to | |
2549 | * implement suspend/resume for drivers that support atomic mode-setting. | |
2550 | * | |
2551 | * Returns: | |
2552 | * 0 on success or a negative error code on failure. | |
2553 | * | |
2554 | * See also: | |
2555 | * drm_atomic_helper_suspend() | |
2556 | */ | |
2557 | int drm_atomic_helper_resume(struct drm_device *dev, | |
2558 | struct drm_atomic_state *state) | |
2559 | { | |
2560 | struct drm_mode_config *config = &dev->mode_config; | |
2561 | int err; | |
2562 | ||
2563 | drm_mode_config_reset(dev); | |
2564 | drm_modeset_lock_all(dev); | |
2565 | state->acquire_ctx = config->acquire_ctx; | |
2566 | err = drm_atomic_commit(state); | |
2567 | drm_modeset_unlock_all(dev); | |
2568 | ||
2569 | return err; | |
2570 | } | |
2571 | EXPORT_SYMBOL(drm_atomic_helper_resume); | |
2572 | ||
042652ed | 2573 | /** |
7f50002f | 2574 | * drm_atomic_helper_crtc_set_property - helper for crtc properties |
042652ed DV |
2575 | * @crtc: DRM crtc |
2576 | * @property: DRM property | |
2577 | * @val: value of property | |
2578 | * | |
7f50002f LP |
2579 | * Provides a default crtc set_property handler using the atomic driver |
2580 | * interface. | |
042652ed DV |
2581 | * |
2582 | * RETURNS: | |
2583 | * Zero on success, error code on failure | |
2584 | */ | |
2585 | int | |
2586 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
2587 | struct drm_property *property, | |
2588 | uint64_t val) | |
2589 | { | |
2590 | struct drm_atomic_state *state; | |
2591 | struct drm_crtc_state *crtc_state; | |
2592 | int ret = 0; | |
2593 | ||
2594 | state = drm_atomic_state_alloc(crtc->dev); | |
2595 | if (!state) | |
2596 | return -ENOMEM; | |
2597 | ||
2598 | /* ->set_property is always called with all locks held. */ | |
2599 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
2600 | retry: | |
2601 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2602 | if (IS_ERR(crtc_state)) { | |
2603 | ret = PTR_ERR(crtc_state); | |
2604 | goto fail; | |
2605 | } | |
2606 | ||
40ecc694 RC |
2607 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
2608 | property, val); | |
042652ed DV |
2609 | if (ret) |
2610 | goto fail; | |
2611 | ||
2612 | ret = drm_atomic_commit(state); | |
042652ed DV |
2613 | fail: |
2614 | if (ret == -EDEADLK) | |
2615 | goto backoff; | |
2616 | ||
0853695c | 2617 | drm_atomic_state_put(state); |
042652ed | 2618 | return ret; |
0853695c | 2619 | |
042652ed | 2620 | backoff: |
042652ed | 2621 | drm_atomic_state_clear(state); |
6f75cea6 | 2622 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2623 | |
2624 | goto retry; | |
2625 | } | |
2626 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
2627 | ||
2628 | /** | |
7f50002f | 2629 | * drm_atomic_helper_plane_set_property - helper for plane properties |
042652ed DV |
2630 | * @plane: DRM plane |
2631 | * @property: DRM property | |
2632 | * @val: value of property | |
2633 | * | |
7f50002f LP |
2634 | * Provides a default plane set_property handler using the atomic driver |
2635 | * interface. | |
042652ed DV |
2636 | * |
2637 | * RETURNS: | |
2638 | * Zero on success, error code on failure | |
2639 | */ | |
2640 | int | |
2641 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
2642 | struct drm_property *property, | |
2643 | uint64_t val) | |
2644 | { | |
2645 | struct drm_atomic_state *state; | |
2646 | struct drm_plane_state *plane_state; | |
2647 | int ret = 0; | |
2648 | ||
2649 | state = drm_atomic_state_alloc(plane->dev); | |
2650 | if (!state) | |
2651 | return -ENOMEM; | |
2652 | ||
2653 | /* ->set_property is always called with all locks held. */ | |
2654 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
2655 | retry: | |
2656 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2657 | if (IS_ERR(plane_state)) { | |
2658 | ret = PTR_ERR(plane_state); | |
2659 | goto fail; | |
2660 | } | |
2661 | ||
40ecc694 RC |
2662 | ret = drm_atomic_plane_set_property(plane, plane_state, |
2663 | property, val); | |
042652ed DV |
2664 | if (ret) |
2665 | goto fail; | |
2666 | ||
2667 | ret = drm_atomic_commit(state); | |
042652ed DV |
2668 | fail: |
2669 | if (ret == -EDEADLK) | |
2670 | goto backoff; | |
2671 | ||
0853695c | 2672 | drm_atomic_state_put(state); |
042652ed | 2673 | return ret; |
0853695c | 2674 | |
042652ed | 2675 | backoff: |
042652ed | 2676 | drm_atomic_state_clear(state); |
6f75cea6 | 2677 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2678 | |
2679 | goto retry; | |
2680 | } | |
2681 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
2682 | ||
2683 | /** | |
7f50002f | 2684 | * drm_atomic_helper_connector_set_property - helper for connector properties |
042652ed DV |
2685 | * @connector: DRM connector |
2686 | * @property: DRM property | |
2687 | * @val: value of property | |
2688 | * | |
7f50002f LP |
2689 | * Provides a default connector set_property handler using the atomic driver |
2690 | * interface. | |
042652ed DV |
2691 | * |
2692 | * RETURNS: | |
2693 | * Zero on success, error code on failure | |
2694 | */ | |
2695 | int | |
2696 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
2697 | struct drm_property *property, | |
2698 | uint64_t val) | |
2699 | { | |
2700 | struct drm_atomic_state *state; | |
2701 | struct drm_connector_state *connector_state; | |
2702 | int ret = 0; | |
2703 | ||
2704 | state = drm_atomic_state_alloc(connector->dev); | |
2705 | if (!state) | |
2706 | return -ENOMEM; | |
2707 | ||
2708 | /* ->set_property is always called with all locks held. */ | |
2709 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
2710 | retry: | |
2711 | connector_state = drm_atomic_get_connector_state(state, connector); | |
2712 | if (IS_ERR(connector_state)) { | |
2713 | ret = PTR_ERR(connector_state); | |
2714 | goto fail; | |
2715 | } | |
2716 | ||
40ecc694 RC |
2717 | ret = drm_atomic_connector_set_property(connector, connector_state, |
2718 | property, val); | |
042652ed DV |
2719 | if (ret) |
2720 | goto fail; | |
2721 | ||
2722 | ret = drm_atomic_commit(state); | |
042652ed DV |
2723 | fail: |
2724 | if (ret == -EDEADLK) | |
2725 | goto backoff; | |
2726 | ||
0853695c | 2727 | drm_atomic_state_put(state); |
042652ed | 2728 | return ret; |
0853695c | 2729 | |
042652ed | 2730 | backoff: |
042652ed | 2731 | drm_atomic_state_clear(state); |
6f75cea6 | 2732 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2733 | |
2734 | goto retry; | |
2735 | } | |
2736 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 DV |
2737 | |
2738 | /** | |
2739 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
2740 | * @crtc: DRM crtc | |
2741 | * @fb: DRM framebuffer | |
2742 | * @event: optional DRM event to signal upon completion | |
2743 | * @flags: flip flags for non-vblank sync'ed updates | |
2744 | * | |
2745 | * Provides a default page flip implementation using the atomic driver interface. | |
2746 | * | |
2747 | * Note that for now so called async page flips (i.e. updates which are not | |
2748 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
2749 | * no provisions for this yet. | |
2750 | * | |
2751 | * Returns: | |
2752 | * Returns 0 on success, negative errno numbers on failure. | |
2753 | */ | |
2754 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
2755 | struct drm_framebuffer *fb, | |
2756 | struct drm_pending_vblank_event *event, | |
2757 | uint32_t flags) | |
2758 | { | |
2759 | struct drm_plane *plane = crtc->primary; | |
2760 | struct drm_atomic_state *state; | |
2761 | struct drm_plane_state *plane_state; | |
2762 | struct drm_crtc_state *crtc_state; | |
2763 | int ret = 0; | |
2764 | ||
2765 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
2766 | return -EINVAL; | |
2767 | ||
2768 | state = drm_atomic_state_alloc(plane->dev); | |
2769 | if (!state) | |
2770 | return -ENOMEM; | |
2771 | ||
2772 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2773 | retry: | |
2774 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2775 | if (IS_ERR(crtc_state)) { | |
2776 | ret = PTR_ERR(crtc_state); | |
2777 | goto fail; | |
2778 | } | |
2779 | crtc_state->event = event; | |
2780 | ||
2781 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2782 | if (IS_ERR(plane_state)) { | |
2783 | ret = PTR_ERR(plane_state); | |
2784 | goto fail; | |
2785 | } | |
2786 | ||
07cc0ef6 | 2787 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
8bc0f312 DV |
2788 | if (ret != 0) |
2789 | goto fail; | |
321ebf04 | 2790 | drm_atomic_set_fb_for_plane(plane_state, fb); |
8bc0f312 | 2791 | |
4cba6850 DV |
2792 | /* Make sure we don't accidentally do a full modeset. */ |
2793 | state->allow_modeset = false; | |
2794 | if (!crtc_state->active) { | |
2795 | DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n", | |
2796 | crtc->base.id); | |
2797 | ret = -EINVAL; | |
2798 | goto fail; | |
2799 | } | |
2800 | ||
b837ba0a | 2801 | ret = drm_atomic_nonblocking_commit(state); |
8bc0f312 DV |
2802 | fail: |
2803 | if (ret == -EDEADLK) | |
2804 | goto backoff; | |
2805 | ||
0853695c | 2806 | drm_atomic_state_put(state); |
8bc0f312 | 2807 | return ret; |
0853695c | 2808 | |
8bc0f312 | 2809 | backoff: |
8bc0f312 | 2810 | drm_atomic_state_clear(state); |
6f75cea6 | 2811 | drm_atomic_legacy_backoff(state); |
8bc0f312 DV |
2812 | |
2813 | /* | |
2814 | * Someone might have exchanged the framebuffer while we dropped locks | |
2815 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2816 | * core does for us. | |
2817 | */ | |
2818 | plane->old_fb = plane->fb; | |
2819 | ||
2820 | goto retry; | |
2821 | } | |
2822 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
d461701c | 2823 | |
b486e0e6 DV |
2824 | /** |
2825 | * drm_atomic_helper_connector_dpms() - connector dpms helper implementation | |
2826 | * @connector: affected connector | |
2827 | * @mode: DPMS mode | |
2828 | * | |
2829 | * This is the main helper function provided by the atomic helper framework for | |
2830 | * implementing the legacy DPMS connector interface. It computes the new desired | |
2831 | * ->active state for the corresponding CRTC (if the connector is enabled) and | |
2e7a5701 | 2832 | * updates it. |
9a69a9ac ML |
2833 | * |
2834 | * Returns: | |
2835 | * Returns 0 on success, negative errno numbers on failure. | |
b486e0e6 | 2836 | */ |
9a69a9ac ML |
2837 | int drm_atomic_helper_connector_dpms(struct drm_connector *connector, |
2838 | int mode) | |
b486e0e6 DV |
2839 | { |
2840 | struct drm_mode_config *config = &connector->dev->mode_config; | |
2841 | struct drm_atomic_state *state; | |
2842 | struct drm_crtc_state *crtc_state; | |
2843 | struct drm_crtc *crtc; | |
2844 | struct drm_connector *tmp_connector; | |
2845 | int ret; | |
2846 | bool active = false; | |
9a69a9ac | 2847 | int old_mode = connector->dpms; |
b486e0e6 DV |
2848 | |
2849 | if (mode != DRM_MODE_DPMS_ON) | |
2850 | mode = DRM_MODE_DPMS_OFF; | |
2851 | ||
2852 | connector->dpms = mode; | |
2853 | crtc = connector->state->crtc; | |
2854 | ||
2855 | if (!crtc) | |
9a69a9ac | 2856 | return 0; |
b486e0e6 | 2857 | |
b486e0e6 DV |
2858 | state = drm_atomic_state_alloc(connector->dev); |
2859 | if (!state) | |
9a69a9ac | 2860 | return -ENOMEM; |
b486e0e6 DV |
2861 | |
2862 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2863 | retry: | |
2864 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
9a69a9ac ML |
2865 | if (IS_ERR(crtc_state)) { |
2866 | ret = PTR_ERR(crtc_state); | |
2867 | goto fail; | |
2868 | } | |
b486e0e6 DV |
2869 | |
2870 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
2871 | ||
9a9f5ce8 | 2872 | drm_for_each_connector(tmp_connector, connector->dev) { |
0388df05 | 2873 | if (tmp_connector->state->crtc != crtc) |
b486e0e6 DV |
2874 | continue; |
2875 | ||
0388df05 | 2876 | if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { |
b486e0e6 DV |
2877 | active = true; |
2878 | break; | |
2879 | } | |
2880 | } | |
2881 | crtc_state->active = active; | |
2882 | ||
2883 | ret = drm_atomic_commit(state); | |
b486e0e6 DV |
2884 | fail: |
2885 | if (ret == -EDEADLK) | |
2886 | goto backoff; | |
8f5040e4 ML |
2887 | if (ret != 0) |
2888 | connector->dpms = old_mode; | |
0853695c | 2889 | drm_atomic_state_put(state); |
9a69a9ac | 2890 | return ret; |
0853695c | 2891 | |
b486e0e6 DV |
2892 | backoff: |
2893 | drm_atomic_state_clear(state); | |
2894 | drm_atomic_legacy_backoff(state); | |
2895 | ||
2896 | goto retry; | |
2897 | } | |
2898 | EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); | |
2899 | ||
9ecb5498 NT |
2900 | /** |
2901 | * drm_atomic_helper_best_encoder - Helper for &drm_connector_helper_funcs | |
2902 | * ->best_encoder callback | |
2903 | * @connector: Connector control structure | |
2904 | * | |
2905 | * This is a &drm_connector_helper_funcs ->best_encoder callback helper for | |
2906 | * connectors that support exactly 1 encoder, statically determined at driver | |
2907 | * init time. | |
2908 | */ | |
2909 | struct drm_encoder * | |
2910 | drm_atomic_helper_best_encoder(struct drm_connector *connector) | |
2911 | { | |
2912 | WARN_ON(connector->encoder_ids[1]); | |
2913 | return drm_encoder_find(connector->dev, connector->encoder_ids[0]); | |
2914 | } | |
2915 | EXPORT_SYMBOL(drm_atomic_helper_best_encoder); | |
2916 | ||
3150c7d0 DV |
2917 | /** |
2918 | * DOC: atomic state reset and initialization | |
2919 | * | |
2920 | * Both the drm core and the atomic helpers assume that there is always the full | |
2921 | * and correct atomic software state for all connectors, CRTCs and planes | |
2922 | * available. Which is a bit a problem on driver load and also after system | |
2923 | * suspend. One way to solve this is to have a hardware state read-out | |
2924 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
2925 | * driver). | |
2926 | * | |
2927 | * The simpler solution is to just reset the software state to everything off, | |
2928 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
2929 | * the atomic helpers provide default reset implementations for all hooks. | |
7f8ee3e5 DV |
2930 | * |
2931 | * On the upside the precise state tracking of atomic simplifies system suspend | |
2932 | * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe | |
2933 | * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume(). | |
2934 | * For other drivers the building blocks are split out, see the documentation | |
2935 | * for these functions. | |
3150c7d0 DV |
2936 | */ |
2937 | ||
d461701c DV |
2938 | /** |
2939 | * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs | |
2940 | * @crtc: drm CRTC | |
2941 | * | |
2942 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
2943 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2944 | */ | |
2945 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
2946 | { | |
b0b5511b | 2947 | if (crtc->state) |
ec2dc6a0 | 2948 | __drm_atomic_helper_crtc_destroy_state(crtc->state); |
b0b5511b | 2949 | |
d461701c DV |
2950 | kfree(crtc->state); |
2951 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
07cc0ef6 DV |
2952 | |
2953 | if (crtc->state) | |
2954 | crtc->state->crtc = crtc; | |
d461701c DV |
2955 | } |
2956 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
2957 | ||
f5e7840b TR |
2958 | /** |
2959 | * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state | |
2960 | * @crtc: CRTC object | |
2961 | * @state: atomic CRTC state | |
2962 | * | |
2963 | * Copies atomic state from a CRTC's current state and resets inferred values. | |
2964 | * This is useful for drivers that subclass the CRTC state. | |
2965 | */ | |
2966 | void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc, | |
2967 | struct drm_crtc_state *state) | |
2968 | { | |
2969 | memcpy(state, crtc->state, sizeof(*state)); | |
2970 | ||
99cf4a29 DS |
2971 | if (state->mode_blob) |
2972 | drm_property_reference_blob(state->mode_blob); | |
5488dc16 LL |
2973 | if (state->degamma_lut) |
2974 | drm_property_reference_blob(state->degamma_lut); | |
2975 | if (state->ctm) | |
2976 | drm_property_reference_blob(state->ctm); | |
2977 | if (state->gamma_lut) | |
2978 | drm_property_reference_blob(state->gamma_lut); | |
f5e7840b TR |
2979 | state->mode_changed = false; |
2980 | state->active_changed = false; | |
2981 | state->planes_changed = false; | |
fc596660 | 2982 | state->connectors_changed = false; |
5488dc16 | 2983 | state->color_mgmt_changed = false; |
44d1240d | 2984 | state->zpos_changed = false; |
f5e7840b TR |
2985 | state->event = NULL; |
2986 | } | |
2987 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state); | |
2988 | ||
d461701c DV |
2989 | /** |
2990 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
2991 | * @crtc: drm CRTC | |
2992 | * | |
2993 | * Default CRTC state duplicate hook for drivers which don't have their own | |
2994 | * subclassed CRTC state structure. | |
2995 | */ | |
2996 | struct drm_crtc_state * | |
2997 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
2998 | { | |
2999 | struct drm_crtc_state *state; | |
3000 | ||
3001 | if (WARN_ON(!crtc->state)) | |
3002 | return NULL; | |
3003 | ||
f5e7840b TR |
3004 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
3005 | if (state) | |
3006 | __drm_atomic_helper_crtc_duplicate_state(crtc, state); | |
d461701c DV |
3007 | |
3008 | return state; | |
3009 | } | |
3010 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
3011 | ||
f5e7840b TR |
3012 | /** |
3013 | * __drm_atomic_helper_crtc_destroy_state - release CRTC state | |
f5e7840b TR |
3014 | * @state: CRTC state object to release |
3015 | * | |
3016 | * Releases all resources stored in the CRTC state without actually freeing | |
3017 | * the memory of the CRTC state. This is useful for drivers that subclass the | |
3018 | * CRTC state. | |
3019 | */ | |
ec2dc6a0 | 3020 | void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state) |
f5e7840b | 3021 | { |
5f911905 | 3022 | drm_property_unreference_blob(state->mode_blob); |
5488dc16 LL |
3023 | drm_property_unreference_blob(state->degamma_lut); |
3024 | drm_property_unreference_blob(state->ctm); | |
3025 | drm_property_unreference_blob(state->gamma_lut); | |
f5e7840b TR |
3026 | } |
3027 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); | |
3028 | ||
d461701c DV |
3029 | /** |
3030 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
3031 | * @crtc: drm CRTC | |
3032 | * @state: CRTC state object to release | |
3033 | * | |
3034 | * Default CRTC state destroy hook for drivers which don't have their own | |
3035 | * subclassed CRTC state structure. | |
3036 | */ | |
3037 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
3038 | struct drm_crtc_state *state) | |
3039 | { | |
ec2dc6a0 | 3040 | __drm_atomic_helper_crtc_destroy_state(state); |
d461701c DV |
3041 | kfree(state); |
3042 | } | |
3043 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
3044 | ||
3045 | /** | |
3046 | * drm_atomic_helper_plane_reset - default ->reset hook for planes | |
3047 | * @plane: drm plane | |
3048 | * | |
3049 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
3050 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
3051 | */ | |
3052 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
3053 | { | |
b0b5511b | 3054 | if (plane->state) |
2f701695 | 3055 | __drm_atomic_helper_plane_destroy_state(plane->state); |
321ebf04 | 3056 | |
d461701c DV |
3057 | kfree(plane->state); |
3058 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
07cc0ef6 | 3059 | |
25aaa3a1 | 3060 | if (plane->state) { |
07cc0ef6 | 3061 | plane->state->plane = plane; |
31ad61e4 | 3062 | plane->state->rotation = DRM_ROTATE_0; |
25aaa3a1 | 3063 | } |
d461701c DV |
3064 | } |
3065 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
3066 | ||
f5e7840b TR |
3067 | /** |
3068 | * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state | |
3069 | * @plane: plane object | |
3070 | * @state: atomic plane state | |
3071 | * | |
3072 | * Copies atomic state from a plane's current state. This is useful for | |
3073 | * drivers that subclass the plane state. | |
3074 | */ | |
3075 | void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane, | |
3076 | struct drm_plane_state *state) | |
3077 | { | |
3078 | memcpy(state, plane->state, sizeof(*state)); | |
3079 | ||
3080 | if (state->fb) | |
3081 | drm_framebuffer_reference(state->fb); | |
96260142 GP |
3082 | |
3083 | state->fence = NULL; | |
f5e7840b TR |
3084 | } |
3085 | EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state); | |
3086 | ||
d461701c DV |
3087 | /** |
3088 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
3089 | * @plane: drm plane | |
3090 | * | |
3091 | * Default plane state duplicate hook for drivers which don't have their own | |
3092 | * subclassed plane state structure. | |
3093 | */ | |
3094 | struct drm_plane_state * | |
3095 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
3096 | { | |
321ebf04 DV |
3097 | struct drm_plane_state *state; |
3098 | ||
d461701c DV |
3099 | if (WARN_ON(!plane->state)) |
3100 | return NULL; | |
3101 | ||
f5e7840b TR |
3102 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
3103 | if (state) | |
3104 | __drm_atomic_helper_plane_duplicate_state(plane, state); | |
321ebf04 DV |
3105 | |
3106 | return state; | |
d461701c DV |
3107 | } |
3108 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
3109 | ||
f5e7840b TR |
3110 | /** |
3111 | * __drm_atomic_helper_plane_destroy_state - release plane state | |
f5e7840b TR |
3112 | * @state: plane state object to release |
3113 | * | |
3114 | * Releases all resources stored in the plane state without actually freeing | |
3115 | * the memory of the plane state. This is useful for drivers that subclass the | |
3116 | * plane state. | |
3117 | */ | |
2f701695 | 3118 | void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state) |
f5e7840b TR |
3119 | { |
3120 | if (state->fb) | |
3121 | drm_framebuffer_unreference(state->fb); | |
96260142 GP |
3122 | |
3123 | if (state->fence) | |
3124 | dma_fence_put(state->fence); | |
f5e7840b TR |
3125 | } |
3126 | EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state); | |
3127 | ||
d461701c DV |
3128 | /** |
3129 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
3130 | * @plane: drm plane | |
3131 | * @state: plane state object to release | |
3132 | * | |
3133 | * Default plane state destroy hook for drivers which don't have their own | |
3134 | * subclassed plane state structure. | |
3135 | */ | |
3136 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
321ebf04 | 3137 | struct drm_plane_state *state) |
d461701c | 3138 | { |
2f701695 | 3139 | __drm_atomic_helper_plane_destroy_state(state); |
d461701c DV |
3140 | kfree(state); |
3141 | } | |
3142 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
3143 | ||
4cd39917 ML |
3144 | /** |
3145 | * __drm_atomic_helper_connector_reset - reset state on connector | |
3146 | * @connector: drm connector | |
3147 | * @conn_state: connector state to assign | |
3148 | * | |
3149 | * Initializes the newly allocated @conn_state and assigns it to | |
3150 | * #connector ->state, usually required when initializing the drivers | |
3151 | * or when called from the ->reset hook. | |
3152 | * | |
3153 | * This is useful for drivers that subclass the connector state. | |
3154 | */ | |
3155 | void | |
3156 | __drm_atomic_helper_connector_reset(struct drm_connector *connector, | |
3157 | struct drm_connector_state *conn_state) | |
3158 | { | |
3159 | if (conn_state) | |
3160 | conn_state->connector = connector; | |
3161 | ||
3162 | connector->state = conn_state; | |
3163 | } | |
3164 | EXPORT_SYMBOL(__drm_atomic_helper_connector_reset); | |
3165 | ||
d461701c DV |
3166 | /** |
3167 | * drm_atomic_helper_connector_reset - default ->reset hook for connectors | |
3168 | * @connector: drm connector | |
3169 | * | |
3170 | * Resets the atomic state for @connector by freeing the state pointer (which | |
3171 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
3172 | * object. | |
3173 | */ | |
3174 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
3175 | { | |
4cd39917 ML |
3176 | struct drm_connector_state *conn_state = |
3177 | kzalloc(sizeof(*conn_state), GFP_KERNEL); | |
07cc0ef6 | 3178 | |
b0b5511b | 3179 | if (connector->state) |
fabd9106 | 3180 | __drm_atomic_helper_connector_destroy_state(connector->state); |
b0b5511b | 3181 | |
4cd39917 ML |
3182 | kfree(connector->state); |
3183 | __drm_atomic_helper_connector_reset(connector, conn_state); | |
d461701c DV |
3184 | } |
3185 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
3186 | ||
f5e7840b TR |
3187 | /** |
3188 | * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state | |
3189 | * @connector: connector object | |
3190 | * @state: atomic connector state | |
3191 | * | |
3192 | * Copies atomic state from a connector's current state. This is useful for | |
3193 | * drivers that subclass the connector state. | |
3194 | */ | |
3195 | void | |
3196 | __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector, | |
3197 | struct drm_connector_state *state) | |
3198 | { | |
3199 | memcpy(state, connector->state, sizeof(*state)); | |
d2307dea DA |
3200 | if (state->crtc) |
3201 | drm_connector_reference(connector); | |
f5e7840b TR |
3202 | } |
3203 | EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state); | |
3204 | ||
d461701c DV |
3205 | /** |
3206 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
3207 | * @connector: drm connector | |
3208 | * | |
3209 | * Default connector state duplicate hook for drivers which don't have their own | |
3210 | * subclassed connector state structure. | |
3211 | */ | |
3212 | struct drm_connector_state * | |
3213 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
3214 | { | |
f5e7840b TR |
3215 | struct drm_connector_state *state; |
3216 | ||
d461701c DV |
3217 | if (WARN_ON(!connector->state)) |
3218 | return NULL; | |
3219 | ||
f5e7840b TR |
3220 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
3221 | if (state) | |
3222 | __drm_atomic_helper_connector_duplicate_state(connector, state); | |
3223 | ||
3224 | return state; | |
d461701c DV |
3225 | } |
3226 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
3227 | ||
397fd77c TR |
3228 | /** |
3229 | * drm_atomic_helper_duplicate_state - duplicate an atomic state object | |
3230 | * @dev: DRM device | |
3231 | * @ctx: lock acquisition context | |
3232 | * | |
3233 | * Makes a copy of the current atomic state by looping over all objects and | |
14942760 TR |
3234 | * duplicating their respective states. This is used for example by suspend/ |
3235 | * resume support code to save the state prior to suspend such that it can | |
3236 | * be restored upon resume. | |
397fd77c TR |
3237 | * |
3238 | * Note that this treats atomic state as persistent between save and restore. | |
3239 | * Drivers must make sure that this is possible and won't result in confusion | |
3240 | * or erroneous behaviour. | |
3241 | * | |
3242 | * Note that if callers haven't already acquired all modeset locks this might | |
3243 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
3244 | * | |
3245 | * Returns: | |
3246 | * A pointer to the copy of the atomic state object on success or an | |
3247 | * ERR_PTR()-encoded error code on failure. | |
14942760 TR |
3248 | * |
3249 | * See also: | |
3250 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
397fd77c TR |
3251 | */ |
3252 | struct drm_atomic_state * | |
3253 | drm_atomic_helper_duplicate_state(struct drm_device *dev, | |
3254 | struct drm_modeset_acquire_ctx *ctx) | |
3255 | { | |
3256 | struct drm_atomic_state *state; | |
3257 | struct drm_connector *conn; | |
3258 | struct drm_plane *plane; | |
3259 | struct drm_crtc *crtc; | |
3260 | int err = 0; | |
3261 | ||
3262 | state = drm_atomic_state_alloc(dev); | |
3263 | if (!state) | |
3264 | return ERR_PTR(-ENOMEM); | |
3265 | ||
3266 | state->acquire_ctx = ctx; | |
3267 | ||
3268 | drm_for_each_crtc(crtc, dev) { | |
3269 | struct drm_crtc_state *crtc_state; | |
3270 | ||
3271 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3272 | if (IS_ERR(crtc_state)) { | |
3273 | err = PTR_ERR(crtc_state); | |
3274 | goto free; | |
3275 | } | |
3276 | } | |
3277 | ||
3278 | drm_for_each_plane(plane, dev) { | |
3279 | struct drm_plane_state *plane_state; | |
3280 | ||
3281 | plane_state = drm_atomic_get_plane_state(state, plane); | |
3282 | if (IS_ERR(plane_state)) { | |
3283 | err = PTR_ERR(plane_state); | |
3284 | goto free; | |
3285 | } | |
3286 | } | |
3287 | ||
3288 | drm_for_each_connector(conn, dev) { | |
3289 | struct drm_connector_state *conn_state; | |
3290 | ||
3291 | conn_state = drm_atomic_get_connector_state(state, conn); | |
3292 | if (IS_ERR(conn_state)) { | |
3293 | err = PTR_ERR(conn_state); | |
3294 | goto free; | |
3295 | } | |
3296 | } | |
3297 | ||
3298 | /* clear the acquire context so that it isn't accidentally reused */ | |
3299 | state->acquire_ctx = NULL; | |
3300 | ||
3301 | free: | |
3302 | if (err < 0) { | |
0853695c | 3303 | drm_atomic_state_put(state); |
397fd77c TR |
3304 | state = ERR_PTR(err); |
3305 | } | |
3306 | ||
3307 | return state; | |
3308 | } | |
3309 | EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); | |
3310 | ||
f5e7840b TR |
3311 | /** |
3312 | * __drm_atomic_helper_connector_destroy_state - release connector state | |
f5e7840b TR |
3313 | * @state: connector state object to release |
3314 | * | |
3315 | * Releases all resources stored in the connector state without actually | |
3316 | * freeing the memory of the connector state. This is useful for drivers that | |
3317 | * subclass the connector state. | |
3318 | */ | |
3319 | void | |
fabd9106 | 3320 | __drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state) |
f5e7840b TR |
3321 | { |
3322 | /* | |
3323 | * This is currently a placeholder so that drivers that subclass the | |
3324 | * state will automatically do the right thing if code is ever added | |
3325 | * to this function. | |
3326 | */ | |
d2307dea DA |
3327 | if (state->crtc) |
3328 | drm_connector_unreference(state->connector); | |
f5e7840b TR |
3329 | } |
3330 | EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state); | |
3331 | ||
d461701c DV |
3332 | /** |
3333 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
3334 | * @connector: drm connector | |
3335 | * @state: connector state object to release | |
3336 | * | |
3337 | * Default connector state destroy hook for drivers which don't have their own | |
3338 | * subclassed connector state structure. | |
3339 | */ | |
3340 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
3341 | struct drm_connector_state *state) | |
3342 | { | |
fabd9106 | 3343 | __drm_atomic_helper_connector_destroy_state(state); |
d461701c DV |
3344 | kfree(state); |
3345 | } | |
3346 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); | |
5488dc16 LL |
3347 | |
3348 | /** | |
3349 | * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table | |
3350 | * @crtc: CRTC object | |
3351 | * @red: red correction table | |
3352 | * @green: green correction table | |
3353 | * @blue: green correction table | |
5488dc16 LL |
3354 | * @size: size of the tables |
3355 | * | |
3356 | * Implements support for legacy gamma correction table for drivers | |
3357 | * that support color management through the DEGAMMA_LUT/GAMMA_LUT | |
3358 | * properties. | |
3359 | */ | |
7ea77283 ML |
3360 | int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc, |
3361 | u16 *red, u16 *green, u16 *blue, | |
3362 | uint32_t size) | |
5488dc16 LL |
3363 | { |
3364 | struct drm_device *dev = crtc->dev; | |
3365 | struct drm_mode_config *config = &dev->mode_config; | |
3366 | struct drm_atomic_state *state; | |
3367 | struct drm_crtc_state *crtc_state; | |
3368 | struct drm_property_blob *blob = NULL; | |
3369 | struct drm_color_lut *blob_data; | |
3370 | int i, ret = 0; | |
3371 | ||
3372 | state = drm_atomic_state_alloc(crtc->dev); | |
3373 | if (!state) | |
7ea77283 | 3374 | return -ENOMEM; |
5488dc16 LL |
3375 | |
3376 | blob = drm_property_create_blob(dev, | |
3377 | sizeof(struct drm_color_lut) * size, | |
3378 | NULL); | |
562c5b4d LL |
3379 | if (IS_ERR(blob)) { |
3380 | ret = PTR_ERR(blob); | |
c1f415c9 | 3381 | blob = NULL; |
5488dc16 LL |
3382 | goto fail; |
3383 | } | |
3384 | ||
3385 | /* Prepare GAMMA_LUT with the legacy values. */ | |
3386 | blob_data = (struct drm_color_lut *) blob->data; | |
3387 | for (i = 0; i < size; i++) { | |
3388 | blob_data[i].red = red[i]; | |
3389 | blob_data[i].green = green[i]; | |
3390 | blob_data[i].blue = blue[i]; | |
3391 | } | |
3392 | ||
3393 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
3394 | retry: | |
3395 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3396 | if (IS_ERR(crtc_state)) { | |
3397 | ret = PTR_ERR(crtc_state); | |
3398 | goto fail; | |
3399 | } | |
3400 | ||
3401 | /* Reset DEGAMMA_LUT and CTM properties. */ | |
3402 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3403 | config->degamma_lut_property, 0); | |
3404 | if (ret) | |
3405 | goto fail; | |
3406 | ||
3407 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3408 | config->ctm_property, 0); | |
3409 | if (ret) | |
3410 | goto fail; | |
3411 | ||
3412 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3413 | config->gamma_lut_property, blob->base.id); | |
3414 | if (ret) | |
3415 | goto fail; | |
3416 | ||
3417 | ret = drm_atomic_commit(state); | |
5488dc16 LL |
3418 | fail: |
3419 | if (ret == -EDEADLK) | |
3420 | goto backoff; | |
3421 | ||
0853695c | 3422 | drm_atomic_state_put(state); |
5488dc16 | 3423 | drm_property_unreference_blob(blob); |
7ea77283 | 3424 | return ret; |
0853695c | 3425 | |
5488dc16 LL |
3426 | backoff: |
3427 | drm_atomic_state_clear(state); | |
3428 | drm_atomic_legacy_backoff(state); | |
3429 | ||
3430 | goto retry; | |
3431 | } | |
3432 | EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set); |