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c2fcd274 DV |
1 | /* |
2 | * Copyright (C) 2014 Red Hat | |
3 | * Copyright (C) 2014 Intel Corp. | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a | |
6 | * copy of this software and associated documentation files (the "Software"), | |
7 | * to deal in the Software without restriction, including without limitation | |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | * and/or sell copies of the Software, and to permit persons to whom the | |
10 | * Software is furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
21 | * OTHER DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Rob Clark <robdclark@gmail.com> | |
25 | * Daniel Vetter <daniel.vetter@ffwll.ch> | |
26 | */ | |
27 | ||
28 | #include <drm/drmP.h> | |
29 | #include <drm/drm_atomic.h> | |
30 | #include <drm/drm_plane_helper.h> | |
31 | #include <drm/drm_crtc_helper.h> | |
623369e5 | 32 | #include <drm/drm_atomic_helper.h> |
e2330f07 | 33 | #include <linux/fence.h> |
c2fcd274 | 34 | |
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. | |
d9b13620 DV |
461 | * |
462 | * IMPORTANT: | |
463 | * | |
464 | * Drivers which update ->mode_changed (e.g. in their ->atomic_check hooks if a | |
465 | * plane update can't be done without a full modeset) _must_ call this function | |
466 | * afterwards after that change. It is permitted to call this function multiple | |
467 | * times for the same update, e.g. when the ->atomic_check functions depend upon | |
468 | * the adjusted dotclock for fifo space allocation and watermark computation. | |
469 | * | |
c39032a8 | 470 | * RETURNS: |
d9b13620 DV |
471 | * Zero for success or -errno |
472 | */ | |
473 | int | |
934ce1c2 | 474 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
475 | struct drm_atomic_state *state) |
476 | { | |
623369e5 DV |
477 | struct drm_crtc *crtc; |
478 | struct drm_crtc_state *crtc_state; | |
df63b999 ACO |
479 | struct drm_connector *connector; |
480 | struct drm_connector_state *connector_state; | |
623369e5 DV |
481 | int i, ret; |
482 | ||
df63b999 | 483 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 | 484 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { |
fa3ab4c2 VS |
485 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n", |
486 | crtc->base.id, crtc->name); | |
623369e5 DV |
487 | crtc_state->mode_changed = true; |
488 | } | |
489 | ||
490 | if (crtc->state->enable != crtc_state->enable) { | |
fa3ab4c2 VS |
491 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n", |
492 | crtc->base.id, crtc->name); | |
fc596660 ML |
493 | |
494 | /* | |
495 | * For clarity this assignment is done here, but | |
496 | * enable == 0 is only true when there are no | |
497 | * connectors and a NULL mode. | |
498 | * | |
499 | * The other way around is true as well. enable != 0 | |
500 | * iff connectors are attached and a mode is set. | |
501 | */ | |
623369e5 | 502 | crtc_state->mode_changed = true; |
fc596660 | 503 | crtc_state->connectors_changed = true; |
623369e5 DV |
504 | } |
505 | } | |
506 | ||
8248b65d ML |
507 | ret = handle_conflicting_encoders(state, state->legacy_set_config); |
508 | if (ret) | |
509 | return ret; | |
40616a26 | 510 | |
df63b999 | 511 | for_each_connector_in_state(state, connector, connector_state, i) { |
623369e5 DV |
512 | /* |
513 | * This only sets crtc->mode_changed for routing changes, | |
514 | * drivers must set crtc->mode_changed themselves when connector | |
515 | * properties need to be updated. | |
516 | */ | |
9459545b ML |
517 | ret = update_connector_routing(state, connector, |
518 | connector_state); | |
623369e5 DV |
519 | if (ret) |
520 | return ret; | |
521 | } | |
522 | ||
523 | /* | |
524 | * After all the routing has been prepared we need to add in any | |
525 | * connector which is itself unchanged, but who's crtc changes it's | |
526 | * configuration. This must be done before calling mode_fixup in case a | |
527 | * crtc only changed its mode but has the same set of connectors. | |
528 | */ | |
df63b999 | 529 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
14de6c44 ML |
530 | bool has_connectors = |
531 | !!crtc_state->connector_mask; | |
623369e5 | 532 | |
eab3bbef DV |
533 | /* |
534 | * We must set ->active_changed after walking connectors for | |
535 | * otherwise an update that only changes active would result in | |
536 | * a full modeset because update_connector_routing force that. | |
537 | */ | |
538 | if (crtc->state->active != crtc_state->active) { | |
fa3ab4c2 VS |
539 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", |
540 | crtc->base.id, crtc->name); | |
eab3bbef DV |
541 | crtc_state->active_changed = true; |
542 | } | |
543 | ||
2465ff62 | 544 | if (!drm_atomic_crtc_needs_modeset(crtc_state)) |
623369e5 DV |
545 | continue; |
546 | ||
fa3ab4c2 VS |
547 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n", |
548 | crtc->base.id, crtc->name, | |
17a38d9c | 549 | crtc_state->enable ? 'y' : 'n', |
fa3ab4c2 | 550 | crtc_state->active ? 'y' : 'n'); |
623369e5 DV |
551 | |
552 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
553 | if (ret != 0) | |
554 | return ret; | |
555 | ||
57744aa7 ML |
556 | ret = drm_atomic_add_affected_planes(state, crtc); |
557 | if (ret != 0) | |
558 | return ret; | |
559 | ||
14de6c44 | 560 | if (crtc_state->enable != has_connectors) { |
fa3ab4c2 VS |
561 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", |
562 | crtc->base.id, crtc->name); | |
623369e5 DV |
563 | |
564 | return -EINVAL; | |
565 | } | |
566 | } | |
567 | ||
568 | return mode_fixup(state); | |
569 | } | |
d9b13620 | 570 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 571 | |
c2fcd274 | 572 | /** |
f98bd3ef | 573 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
574 | * @dev: DRM device |
575 | * @state: the driver state object | |
576 | * | |
577 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 DV |
578 | * This does all the plane update related checks using by calling into the |
579 | * ->atomic_check hooks provided by the driver. | |
c2fcd274 | 580 | * |
fc596660 ML |
581 | * It also sets crtc_state->planes_changed to indicate that a crtc has |
582 | * updated planes. | |
583 | * | |
c39032a8 | 584 | * RETURNS: |
c2fcd274 DV |
585 | * Zero for success or -errno |
586 | */ | |
d9b13620 DV |
587 | int |
588 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
589 | struct drm_atomic_state *state) | |
c2fcd274 | 590 | { |
df63b999 ACO |
591 | struct drm_crtc *crtc; |
592 | struct drm_crtc_state *crtc_state; | |
593 | struct drm_plane *plane; | |
594 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
595 | int i, ret = 0; |
596 | ||
44d1240d MS |
597 | ret = drm_atomic_helper_normalize_zpos(dev, state); |
598 | if (ret) | |
599 | return ret; | |
600 | ||
df63b999 | 601 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 602 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
603 | |
604 | funcs = plane->helper_private; | |
605 | ||
606 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
607 | ||
608 | if (!funcs || !funcs->atomic_check) | |
609 | continue; | |
610 | ||
611 | ret = funcs->atomic_check(plane, plane_state); | |
612 | if (ret) { | |
9f4c97a2 VS |
613 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n", |
614 | plane->base.id, plane->name); | |
c2fcd274 DV |
615 | return ret; |
616 | } | |
617 | } | |
618 | ||
df63b999 | 619 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 620 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
621 | |
622 | funcs = crtc->helper_private; | |
623 | ||
624 | if (!funcs || !funcs->atomic_check) | |
625 | continue; | |
626 | ||
be9174a4 | 627 | ret = funcs->atomic_check(crtc, crtc_state); |
c2fcd274 | 628 | if (ret) { |
fa3ab4c2 VS |
629 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n", |
630 | crtc->base.id, crtc->name); | |
c2fcd274 DV |
631 | return ret; |
632 | } | |
633 | } | |
634 | ||
d9b13620 DV |
635 | return ret; |
636 | } | |
637 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
638 | ||
639 | /** | |
640 | * drm_atomic_helper_check - validate state object | |
641 | * @dev: DRM device | |
642 | * @state: the driver state object | |
643 | * | |
644 | * Check the state object to see if the requested state is physically possible. | |
645 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
646 | * checking that a driver needs it can simply wrap that around this function. | |
647 | * Drivers without such needs can directly use this as their ->atomic_check() | |
648 | * callback. | |
649 | * | |
b4274fbe DV |
650 | * This just wraps the two parts of the state checking for planes and modeset |
651 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
652 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
653 | * ->atomic_check functions depend upon an updated adjusted_mode.clock to | |
654 | * e.g. properly compute watermarks. | |
655 | * | |
c39032a8 | 656 | * RETURNS: |
d9b13620 DV |
657 | * Zero for success or -errno |
658 | */ | |
659 | int drm_atomic_helper_check(struct drm_device *dev, | |
660 | struct drm_atomic_state *state) | |
661 | { | |
662 | int ret; | |
663 | ||
b4274fbe | 664 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
665 | if (ret) |
666 | return ret; | |
667 | ||
b4274fbe | 668 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
669 | if (ret) |
670 | return ret; | |
671 | ||
c2fcd274 DV |
672 | return ret; |
673 | } | |
674 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
675 | ||
623369e5 DV |
676 | static void |
677 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
678 | { | |
df63b999 ACO |
679 | struct drm_connector *connector; |
680 | struct drm_connector_state *old_conn_state; | |
681 | struct drm_crtc *crtc; | |
682 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
683 | int i; |
684 | ||
df63b999 | 685 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 686 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
687 | struct drm_encoder *encoder; |
688 | ||
623369e5 DV |
689 | /* Shut down everything that's in the changeset and currently |
690 | * still on. So need to check the old, saved state. */ | |
df63b999 | 691 | if (!old_conn_state->crtc) |
623369e5 DV |
692 | continue; |
693 | ||
2943ef32 AH |
694 | old_crtc_state = drm_atomic_get_existing_crtc_state(old_state, |
695 | old_conn_state->crtc); | |
eab3bbef | 696 | |
4218a32f | 697 | if (!old_crtc_state->active || |
2465ff62 | 698 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) |
eab3bbef DV |
699 | continue; |
700 | ||
46df9adb | 701 | encoder = old_conn_state->best_encoder; |
623369e5 | 702 | |
46df9adb RC |
703 | /* We shouldn't get this far if we didn't previously have |
704 | * an encoder.. but WARN_ON() rather than explode. | |
705 | */ | |
706 | if (WARN_ON(!encoder)) | |
623369e5 DV |
707 | continue; |
708 | ||
709 | funcs = encoder->helper_private; | |
710 | ||
17a38d9c DV |
711 | DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
712 | encoder->base.id, encoder->name); | |
95d6eb3b | 713 | |
623369e5 DV |
714 | /* |
715 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 716 | * it away), so we won't call disable hooks twice. |
623369e5 | 717 | */ |
862e686c | 718 | drm_bridge_disable(encoder->bridge); |
623369e5 DV |
719 | |
720 | /* Right function depends upon target state. */ | |
2827635e NT |
721 | if (funcs) { |
722 | if (connector->state->crtc && funcs->prepare) | |
723 | funcs->prepare(encoder); | |
724 | else if (funcs->disable) | |
725 | funcs->disable(encoder); | |
726 | else if (funcs->dpms) | |
727 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
728 | } | |
623369e5 | 729 | |
862e686c | 730 | drm_bridge_post_disable(encoder->bridge); |
623369e5 DV |
731 | } |
732 | ||
df63b999 | 733 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 734 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
735 | |
736 | /* Shut down everything that needs a full modeset. */ | |
2465ff62 | 737 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
738 | continue; |
739 | ||
740 | if (!old_crtc_state->active) | |
623369e5 DV |
741 | continue; |
742 | ||
743 | funcs = crtc->helper_private; | |
744 | ||
fa3ab4c2 VS |
745 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n", |
746 | crtc->base.id, crtc->name); | |
95d6eb3b DV |
747 | |
748 | ||
623369e5 | 749 | /* Right function depends upon target state. */ |
ee0a89cf | 750 | if (crtc->state->enable && funcs->prepare) |
623369e5 DV |
751 | funcs->prepare(crtc); |
752 | else if (funcs->disable) | |
753 | funcs->disable(crtc); | |
754 | else | |
755 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
756 | } | |
757 | } | |
758 | ||
4c18d301 DV |
759 | /** |
760 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state | |
761 | * @dev: DRM device | |
762 | * @old_state: atomic state object with old state structures | |
763 | * | |
764 | * This function updates all the various legacy modeset state pointers in | |
765 | * connectors, encoders and crtcs. It also updates the timestamping constants | |
766 | * used for precise vblank timestamps by calling | |
767 | * drm_calc_timestamping_constants(). | |
768 | * | |
769 | * Drivers can use this for building their own atomic commit if they don't have | |
770 | * a pure helper-based modeset implementation. | |
771 | */ | |
772 | void | |
773 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, | |
774 | struct drm_atomic_state *old_state) | |
623369e5 | 775 | { |
df63b999 ACO |
776 | struct drm_connector *connector; |
777 | struct drm_connector_state *old_conn_state; | |
778 | struct drm_crtc *crtc; | |
779 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
780 | int i; |
781 | ||
8c10342c | 782 | /* clear out existing links and update dpms */ |
df63b999 | 783 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
8c10342c ML |
784 | if (connector->encoder) { |
785 | WARN_ON(!connector->encoder->crtc); | |
786 | ||
787 | connector->encoder->crtc = NULL; | |
788 | connector->encoder = NULL; | |
789 | } | |
623369e5 | 790 | |
8c10342c ML |
791 | crtc = connector->state->crtc; |
792 | if ((!crtc && old_conn_state->crtc) || | |
793 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { | |
794 | struct drm_property *dpms_prop = | |
795 | dev->mode_config.dpms_property; | |
796 | int mode = DRM_MODE_DPMS_OFF; | |
623369e5 | 797 | |
8c10342c ML |
798 | if (crtc && crtc->state->active) |
799 | mode = DRM_MODE_DPMS_ON; | |
800 | ||
801 | connector->dpms = mode; | |
802 | drm_object_property_set_value(&connector->base, | |
803 | dpms_prop, mode); | |
804 | } | |
623369e5 DV |
805 | } |
806 | ||
807 | /* set new links */ | |
df63b999 ACO |
808 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
809 | if (!connector->state->crtc) | |
623369e5 DV |
810 | continue; |
811 | ||
812 | if (WARN_ON(!connector->state->best_encoder)) | |
813 | continue; | |
814 | ||
815 | connector->encoder = connector->state->best_encoder; | |
816 | connector->encoder->crtc = connector->state->crtc; | |
817 | } | |
818 | ||
819 | /* set legacy state in the crtc structure */ | |
df63b999 | 820 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
2660801f ML |
821 | struct drm_plane *primary = crtc->primary; |
822 | ||
623369e5 DV |
823 | crtc->mode = crtc->state->mode; |
824 | crtc->enabled = crtc->state->enable; | |
2660801f ML |
825 | |
826 | if (drm_atomic_get_existing_plane_state(old_state, primary) && | |
827 | primary->state->crtc == crtc) { | |
828 | crtc->x = primary->state->src_x >> 16; | |
829 | crtc->y = primary->state->src_y >> 16; | |
830 | } | |
3d51d2d2 DV |
831 | |
832 | if (crtc->state->enable) | |
833 | drm_calc_timestamping_constants(crtc, | |
834 | &crtc->state->adjusted_mode); | |
623369e5 DV |
835 | } |
836 | } | |
4c18d301 | 837 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); |
623369e5 DV |
838 | |
839 | static void | |
840 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
841 | { | |
df63b999 ACO |
842 | struct drm_crtc *crtc; |
843 | struct drm_crtc_state *old_crtc_state; | |
844 | struct drm_connector *connector; | |
845 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
846 | int i; |
847 | ||
df63b999 | 848 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 849 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 850 | |
df63b999 | 851 | if (!crtc->state->mode_changed) |
623369e5 DV |
852 | continue; |
853 | ||
854 | funcs = crtc->helper_private; | |
855 | ||
c982bd90 | 856 | if (crtc->state->enable && funcs->mode_set_nofb) { |
fa3ab4c2 VS |
857 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n", |
858 | crtc->base.id, crtc->name); | |
95d6eb3b | 859 | |
623369e5 | 860 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 861 | } |
623369e5 DV |
862 | } |
863 | ||
df63b999 | 864 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 865 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 866 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
867 | struct drm_encoder *encoder; |
868 | struct drm_display_mode *mode, *adjusted_mode; | |
869 | ||
df63b999 | 870 | if (!connector->state->best_encoder) |
623369e5 DV |
871 | continue; |
872 | ||
873 | encoder = connector->state->best_encoder; | |
874 | funcs = encoder->helper_private; | |
875 | new_crtc_state = connector->state->crtc->state; | |
876 | mode = &new_crtc_state->mode; | |
877 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
878 | ||
eab3bbef DV |
879 | if (!new_crtc_state->mode_changed) |
880 | continue; | |
881 | ||
17a38d9c DV |
882 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
883 | encoder->base.id, encoder->name); | |
95d6eb3b | 884 | |
623369e5 DV |
885 | /* |
886 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 887 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 888 | */ |
fe4a11c9 PZ |
889 | if (funcs && funcs->atomic_mode_set) { |
890 | funcs->atomic_mode_set(encoder, new_crtc_state, | |
891 | connector->state); | |
892 | } else if (funcs && funcs->mode_set) { | |
c982bd90 | 893 | funcs->mode_set(encoder, mode, adjusted_mode); |
fe4a11c9 | 894 | } |
623369e5 | 895 | |
862e686c | 896 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
623369e5 DV |
897 | } |
898 | } | |
899 | ||
900 | /** | |
1af434a9 | 901 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 902 | * @dev: DRM device |
a072f809 | 903 | * @old_state: atomic state object with old state structures |
623369e5 | 904 | * |
1af434a9 | 905 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 906 | * prepares them (if required) with the new mode. |
1af434a9 | 907 | * |
60acc4eb | 908 | * For compatibility with legacy crtc helpers this should be called before |
1af434a9 DV |
909 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
910 | * does. But drivers with different needs can group the modeset commits together | |
911 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
912 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 913 | */ |
1af434a9 DV |
914 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
915 | struct drm_atomic_state *old_state) | |
623369e5 | 916 | { |
a072f809 | 917 | disable_outputs(dev, old_state); |
4c18d301 DV |
918 | |
919 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); | |
920 | ||
a072f809 | 921 | crtc_set_mode(dev, old_state); |
623369e5 | 922 | } |
1af434a9 | 923 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 DV |
924 | |
925 | /** | |
1af434a9 | 926 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
927 | * @dev: DRM device |
928 | * @old_state: atomic state object with old state structures | |
929 | * | |
1af434a9 DV |
930 | * This function enables all the outputs with the new configuration which had to |
931 | * be turned off for the update. | |
932 | * | |
60acc4eb | 933 | * For compatibility with legacy crtc helpers this should be called after |
1af434a9 DV |
934 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
935 | * does. But drivers with different needs can group the modeset commits together | |
936 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
937 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 938 | */ |
1af434a9 DV |
939 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
940 | struct drm_atomic_state *old_state) | |
623369e5 | 941 | { |
df63b999 ACO |
942 | struct drm_crtc *crtc; |
943 | struct drm_crtc_state *old_crtc_state; | |
944 | struct drm_connector *connector; | |
945 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
946 | int i; |
947 | ||
df63b999 | 948 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 949 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
950 | |
951 | /* Need to filter out CRTCs where only planes change. */ | |
2465ff62 | 952 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
953 | continue; |
954 | ||
955 | if (!crtc->state->active) | |
623369e5 DV |
956 | continue; |
957 | ||
958 | funcs = crtc->helper_private; | |
959 | ||
ee0a89cf | 960 | if (crtc->state->enable) { |
fa3ab4c2 VS |
961 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n", |
962 | crtc->base.id, crtc->name); | |
95d6eb3b | 963 | |
ee0a89cf DV |
964 | if (funcs->enable) |
965 | funcs->enable(crtc); | |
966 | else | |
967 | funcs->commit(crtc); | |
968 | } | |
623369e5 DV |
969 | } |
970 | ||
df63b999 | 971 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 972 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
973 | struct drm_encoder *encoder; |
974 | ||
df63b999 | 975 | if (!connector->state->best_encoder) |
623369e5 DV |
976 | continue; |
977 | ||
4218a32f | 978 | if (!connector->state->crtc->state->active || |
2465ff62 | 979 | !drm_atomic_crtc_needs_modeset(connector->state->crtc->state)) |
eab3bbef DV |
980 | continue; |
981 | ||
623369e5 DV |
982 | encoder = connector->state->best_encoder; |
983 | funcs = encoder->helper_private; | |
984 | ||
17a38d9c DV |
985 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
986 | encoder->base.id, encoder->name); | |
95d6eb3b | 987 | |
623369e5 DV |
988 | /* |
989 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 990 | * it away), so we won't call enable hooks twice. |
623369e5 | 991 | */ |
862e686c | 992 | drm_bridge_pre_enable(encoder->bridge); |
623369e5 | 993 | |
2827635e NT |
994 | if (funcs) { |
995 | if (funcs->enable) | |
996 | funcs->enable(encoder); | |
997 | else if (funcs->commit) | |
998 | funcs->commit(encoder); | |
999 | } | |
623369e5 | 1000 | |
862e686c | 1001 | drm_bridge_enable(encoder->bridge); |
623369e5 DV |
1002 | } |
1003 | } | |
1af434a9 | 1004 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 1005 | |
4c5b7f3a RC |
1006 | /** |
1007 | * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state | |
1008 | * @dev: DRM device | |
1009 | * @state: atomic state object with old state structures | |
1010 | * | |
1011 | * For implicit sync, driver should fish the exclusive fence out from the | |
1012 | * incoming fb's and stash it in the drm_plane_state. This is called after | |
1013 | * drm_atomic_helper_swap_state() so it uses the current plane state (and | |
1014 | * just uses the atomic state to find the changed planes) | |
1015 | */ | |
1016 | void drm_atomic_helper_wait_for_fences(struct drm_device *dev, | |
e2330f07 DV |
1017 | struct drm_atomic_state *state) |
1018 | { | |
df63b999 ACO |
1019 | struct drm_plane *plane; |
1020 | struct drm_plane_state *plane_state; | |
e2330f07 DV |
1021 | int i; |
1022 | ||
df63b999 ACO |
1023 | for_each_plane_in_state(state, plane, plane_state, i) { |
1024 | if (!plane->state->fence) | |
e2330f07 DV |
1025 | continue; |
1026 | ||
1027 | WARN_ON(!plane->state->fb); | |
1028 | ||
1029 | fence_wait(plane->state->fence, false); | |
1030 | fence_put(plane->state->fence); | |
1031 | plane->state->fence = NULL; | |
1032 | } | |
1033 | } | |
4c5b7f3a | 1034 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences); |
e2330f07 | 1035 | |
c240906d JK |
1036 | /** |
1037 | * drm_atomic_helper_framebuffer_changed - check if framebuffer has changed | |
1038 | * @dev: DRM device | |
1039 | * @old_state: atomic state object with old state structures | |
1040 | * @crtc: DRM crtc | |
1041 | * | |
1042 | * Checks whether the framebuffer used for this CRTC changes as a result of | |
1043 | * the atomic update. This is useful for drivers which cannot use | |
1044 | * drm_atomic_helper_wait_for_vblanks() and need to reimplement its | |
1045 | * functionality. | |
1046 | * | |
1047 | * Returns: | |
1048 | * true if the framebuffer changed. | |
1049 | */ | |
1050 | bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev, | |
1051 | struct drm_atomic_state *old_state, | |
1052 | struct drm_crtc *crtc) | |
ab58e338 DV |
1053 | { |
1054 | struct drm_plane *plane; | |
1055 | struct drm_plane_state *old_plane_state; | |
ab58e338 DV |
1056 | int i; |
1057 | ||
df63b999 | 1058 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
ab58e338 DV |
1059 | if (plane->state->crtc != crtc && |
1060 | old_plane_state->crtc != crtc) | |
1061 | continue; | |
1062 | ||
1063 | if (plane->state->fb != old_plane_state->fb) | |
1064 | return true; | |
1065 | } | |
1066 | ||
1067 | return false; | |
1068 | } | |
c240906d | 1069 | EXPORT_SYMBOL(drm_atomic_helper_framebuffer_changed); |
ab58e338 | 1070 | |
5ee3229c RC |
1071 | /** |
1072 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
1073 | * @dev: DRM device | |
1074 | * @old_state: atomic state object with old state structures | |
1075 | * | |
1076 | * Helper to, after atomic commit, wait for vblanks on all effected | |
1077 | * crtcs (ie. before cleaning up old framebuffers using | |
ab58e338 DV |
1078 | * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
1079 | * framebuffers have actually changed to optimize for the legacy cursor and | |
1080 | * plane update use-case. | |
5ee3229c RC |
1081 | */ |
1082 | void | |
1083 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
1084 | struct drm_atomic_state *old_state) | |
623369e5 DV |
1085 | { |
1086 | struct drm_crtc *crtc; | |
1087 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
1088 | int i, ret; |
1089 | ||
df63b999 | 1090 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
623369e5 DV |
1091 | /* No one cares about the old state, so abuse it for tracking |
1092 | * and store whether we hold a vblank reference (and should do a | |
1093 | * vblank wait) in the ->enable boolean. */ | |
1094 | old_crtc_state->enable = false; | |
1095 | ||
1096 | if (!crtc->state->enable) | |
1097 | continue; | |
1098 | ||
f02ad907 DV |
1099 | /* Legacy cursor ioctls are completely unsynced, and userspace |
1100 | * relies on that (by doing tons of cursor updates). */ | |
1101 | if (old_state->legacy_cursor_update) | |
1102 | continue; | |
1103 | ||
c240906d JK |
1104 | if (!drm_atomic_helper_framebuffer_changed(dev, |
1105 | old_state, crtc)) | |
ab58e338 DV |
1106 | continue; |
1107 | ||
623369e5 DV |
1108 | ret = drm_crtc_vblank_get(crtc); |
1109 | if (ret != 0) | |
1110 | continue; | |
1111 | ||
1112 | old_crtc_state->enable = true; | |
d4853630 | 1113 | old_crtc_state->last_vblank_count = drm_crtc_vblank_count(crtc); |
623369e5 DV |
1114 | } |
1115 | ||
df63b999 ACO |
1116 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
1117 | if (!old_crtc_state->enable) | |
623369e5 DV |
1118 | continue; |
1119 | ||
1120 | ret = wait_event_timeout(dev->vblank[i].queue, | |
1121 | old_crtc_state->last_vblank_count != | |
d4853630 | 1122 | drm_crtc_vblank_count(crtc), |
623369e5 DV |
1123 | msecs_to_jiffies(50)); |
1124 | ||
8d4d0d70 VS |
1125 | WARN(!ret, "[CRTC:%d] vblank wait timed out\n", crtc->base.id); |
1126 | ||
623369e5 DV |
1127 | drm_crtc_vblank_put(crtc); |
1128 | } | |
1129 | } | |
5ee3229c | 1130 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 DV |
1131 | |
1132 | /** | |
9f2a7950 DV |
1133 | * drm_atomic_helper_commit_tail - commit atomic update to hardware |
1134 | * @state: new modeset state to be committed | |
623369e5 | 1135 | * |
9f2a7950 DV |
1136 | * This is the default implemenation for the ->atomic_commit_tail() hook of the |
1137 | * &drm_mode_config_helper_funcs vtable. | |
623369e5 | 1138 | * |
9f2a7950 DV |
1139 | * Note that the default ordering of how the various stages are called is to |
1140 | * match the legacy modeset helper library closest. One peculiarity of that is | |
1141 | * that it doesn't mesh well with runtime PM at all. | |
6e48ae32 | 1142 | * |
9f2a7950 | 1143 | * For drivers supporting runtime PM the recommended sequence is instead :: |
6e48ae32 DV |
1144 | * |
1145 | * drm_atomic_helper_commit_modeset_disables(dev, state); | |
1146 | * | |
1147 | * drm_atomic_helper_commit_modeset_enables(dev, state); | |
1148 | * | |
1149 | * drm_atomic_helper_commit_planes(dev, state, true); | |
1150 | * | |
9f2a7950 DV |
1151 | * for committing the atomic update to hardware. See the kerneldoc entries for |
1152 | * these three functions for more details. | |
1153 | */ | |
1154 | void drm_atomic_helper_commit_tail(struct drm_atomic_state *state) | |
1155 | { | |
1156 | struct drm_device *dev = state->dev; | |
1157 | ||
1158 | drm_atomic_helper_commit_modeset_disables(dev, state); | |
1159 | ||
1160 | drm_atomic_helper_commit_planes(dev, state, false); | |
1161 | ||
1162 | drm_atomic_helper_commit_modeset_enables(dev, state); | |
1163 | ||
1164 | drm_atomic_helper_commit_hw_done(state); | |
1165 | ||
1166 | drm_atomic_helper_wait_for_vblanks(dev, state); | |
1167 | ||
1168 | drm_atomic_helper_cleanup_planes(dev, state); | |
1169 | } | |
1170 | EXPORT_SYMBOL(drm_atomic_helper_commit_tail); | |
1171 | ||
1172 | static void commit_tail(struct drm_atomic_state *state) | |
1173 | { | |
1174 | struct drm_device *dev = state->dev; | |
1175 | struct drm_mode_config_helper_funcs *funcs; | |
1176 | ||
1177 | funcs = dev->mode_config.helper_private; | |
1178 | ||
1179 | drm_atomic_helper_wait_for_fences(dev, state); | |
1180 | ||
1181 | drm_atomic_helper_wait_for_dependencies(state); | |
1182 | ||
1183 | if (funcs && funcs->atomic_commit_tail) | |
1184 | funcs->atomic_commit_tail(state); | |
1185 | else | |
1186 | drm_atomic_helper_commit_tail(state); | |
1187 | ||
1188 | drm_atomic_helper_commit_cleanup_done(state); | |
1189 | ||
1190 | drm_atomic_state_free(state); | |
1191 | } | |
1192 | ||
1193 | static void commit_work(struct work_struct *work) | |
1194 | { | |
1195 | struct drm_atomic_state *state = container_of(work, | |
1196 | struct drm_atomic_state, | |
1197 | commit_work); | |
1198 | commit_tail(state); | |
1199 | } | |
1200 | ||
1201 | /** | |
1202 | * drm_atomic_helper_commit - commit validated state object | |
1203 | * @dev: DRM device | |
1204 | * @state: the driver state object | |
1205 | * @nonblock: whether nonblocking behavior is requested. | |
1206 | * | |
1207 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
1208 | * object. This can still fail when e.g. the framebuffer reservation fails. This | |
1209 | * function implements nonblocking commits, using | |
1210 | * drm_atomic_helper_setup_commit() and related functions. | |
1211 | * | |
1212 | * Note that right now this function does not support nonblocking commits, hence | |
1213 | * driver writers must implement their own version for now. | |
1214 | * | |
1215 | * Committing the actual hardware state is done through the | |
1216 | * ->atomic_commit_tail() callback of the &drm_mode_config_helper_funcs vtable, | |
1217 | * or it's default implementation drm_atomic_helper_commit_tail(). | |
6e48ae32 | 1218 | * |
c39032a8 | 1219 | * RETURNS: |
623369e5 DV |
1220 | * Zero for success or -errno. |
1221 | */ | |
1222 | int drm_atomic_helper_commit(struct drm_device *dev, | |
1223 | struct drm_atomic_state *state, | |
286dbb8d | 1224 | bool nonblock) |
623369e5 DV |
1225 | { |
1226 | int ret; | |
1227 | ||
a095caa7 DV |
1228 | ret = drm_atomic_helper_setup_commit(state, nonblock); |
1229 | if (ret) | |
1230 | return ret; | |
1231 | ||
9f2a7950 DV |
1232 | INIT_WORK(&state->commit_work, commit_work); |
1233 | ||
623369e5 DV |
1234 | ret = drm_atomic_helper_prepare_planes(dev, state); |
1235 | if (ret) | |
1236 | return ret; | |
1237 | ||
1238 | /* | |
1239 | * This is the point of no return - everything below never fails except | |
1240 | * when the hw goes bonghits. Which means we can commit the new state on | |
1241 | * the software side now. | |
1242 | */ | |
1243 | ||
5e84c269 | 1244 | drm_atomic_helper_swap_state(state, true); |
623369e5 DV |
1245 | |
1246 | /* | |
1247 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 1248 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
1249 | * that the asynchronous work has either been cancelled (if the driver |
1250 | * supports it, which at least requires that the framebuffers get | |
1251 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
1252 | * before the new state gets committed on the software side with | |
1253 | * drm_atomic_helper_swap_state(). | |
1254 | * | |
1255 | * This scheme allows new atomic state updates to be prepared and | |
1256 | * checked in parallel to the asynchronous completion of the previous | |
1257 | * update. Which is important since compositors need to figure out the | |
1258 | * composition of the next frame right after having submitted the | |
1259 | * current layout. | |
9f2a7950 DV |
1260 | * |
1261 | * NOTE: Commit work has multiple phases, first hardware commit, then | |
1262 | * cleanup. We want them to overlap, hence need system_unbound_wq to | |
1263 | * make sure work items don't artifically stall on each another. | |
623369e5 DV |
1264 | */ |
1265 | ||
9f2a7950 DV |
1266 | if (nonblock) |
1267 | queue_work(system_unbound_wq, &state->commit_work); | |
1268 | else | |
1269 | commit_tail(state); | |
623369e5 DV |
1270 | |
1271 | return 0; | |
1272 | } | |
1273 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1274 | ||
e8c833a7 | 1275 | /** |
286dbb8d | 1276 | * DOC: implementing nonblocking commit |
e8c833a7 | 1277 | * |
9f2a7950 | 1278 | * Nonblocking atomic commits have to be implemented in the following sequence: |
e8c833a7 DV |
1279 | * |
1280 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
1281 | * which commit needs to call which can fail, so we want to run it first and | |
1282 | * synchronously. | |
1283 | * | |
286dbb8d | 1284 | * 2. Synchronize with any outstanding nonblocking commit worker threads which |
e8c833a7 DV |
1285 | * might be affected the new state update. This can be done by either cancelling |
1286 | * or flushing the work items, depending upon whether the driver can deal with | |
1287 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
1288 | * cleanup is still done when cancelling. | |
1289 | * | |
9f2a7950 DV |
1290 | * Asynchronous workers need to have sufficient parallelism to be able to run |
1291 | * different atomic commits on different CRTCs in parallel. The simplest way to | |
1292 | * achive this is by running them on the &system_unbound_wq work queue. Note | |
1293 | * that drivers are not required to split up atomic commits and run an | |
1294 | * individual commit in parallel - userspace is supposed to do that if it cares. | |
1295 | * But it might be beneficial to do that for modesets, since those necessarily | |
1296 | * must be done as one global operation, and enabling or disabling a CRTC can | |
1297 | * take a long time. But even that is not required. | |
e8c833a7 DV |
1298 | * |
1299 | * 3. The software state is updated synchronously with | |
26196f7e | 1300 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
e8c833a7 | 1301 | * locks means concurrent callers never see inconsistent state. And doing this |
286dbb8d ML |
1302 | * while it's guaranteed that no relevant nonblocking worker runs means that |
1303 | * nonblocking workers do not need grab any locks. Actually they must not grab | |
1304 | * locks, for otherwise the work flushing will deadlock. | |
e8c833a7 DV |
1305 | * |
1306 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1307 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1308 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
1309 | * being displayed. | |
9f2a7950 DV |
1310 | * |
1311 | * The above scheme is implemented in the atomic helper libraries in | |
1312 | * drm_atomic_helper_commit() using a bunch of helper functions. See | |
1313 | * drm_atomic_helper_setup_commit() for a starting point. | |
e8c833a7 DV |
1314 | */ |
1315 | ||
a095caa7 DV |
1316 | static int stall_checks(struct drm_crtc *crtc, bool nonblock) |
1317 | { | |
1318 | struct drm_crtc_commit *commit, *stall_commit = NULL; | |
1319 | bool completed = true; | |
1320 | int i; | |
1321 | long ret = 0; | |
1322 | ||
1323 | spin_lock(&crtc->commit_lock); | |
1324 | i = 0; | |
1325 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) { | |
1326 | if (i == 0) { | |
1327 | completed = try_wait_for_completion(&commit->flip_done); | |
1328 | /* Userspace is not allowed to get ahead of the previous | |
1329 | * commit with nonblocking ones. */ | |
1330 | if (!completed && nonblock) { | |
1331 | spin_unlock(&crtc->commit_lock); | |
1332 | return -EBUSY; | |
1333 | } | |
1334 | } else if (i == 1) { | |
1335 | stall_commit = commit; | |
1336 | drm_crtc_commit_get(stall_commit); | |
a095caa7 | 1337 | break; |
723c3e55 | 1338 | } |
a095caa7 DV |
1339 | |
1340 | i++; | |
1341 | } | |
1342 | spin_unlock(&crtc->commit_lock); | |
1343 | ||
1344 | if (!stall_commit) | |
1345 | return 0; | |
1346 | ||
1347 | /* We don't want to let commits get ahead of cleanup work too much, | |
1348 | * stalling on 2nd previous commit means triple-buffer won't ever stall. | |
1349 | */ | |
723c3e55 | 1350 | ret = wait_for_completion_interruptible_timeout(&stall_commit->cleanup_done, |
a095caa7 DV |
1351 | 10*HZ); |
1352 | if (ret == 0) | |
1353 | DRM_ERROR("[CRTC:%d:%s] cleanup_done timed out\n", | |
1354 | crtc->base.id, crtc->name); | |
1355 | ||
1356 | drm_crtc_commit_put(stall_commit); | |
1357 | ||
1358 | return ret < 0 ? ret : 0; | |
1359 | } | |
1360 | ||
1361 | /** | |
1362 | * drm_atomic_helper_setup_commit - setup possibly nonblocking commit | |
1363 | * @state: new modeset state to be committed | |
1364 | * @nonblock: whether nonblocking behavior is requested. | |
1365 | * | |
1366 | * This function prepares @state to be used by the atomic helper's support for | |
1367 | * nonblocking commits. Drivers using the nonblocking commit infrastructure | |
1368 | * should always call this function from their ->atomic_commit hook. | |
1369 | * | |
1370 | * To be able to use this support drivers need to use a few more helper | |
1371 | * functions. drm_atomic_helper_wait_for_dependencies() must be called before | |
1372 | * actually committing the hardware state, and for nonblocking commits this call | |
1373 | * must be placed in the async worker. See also drm_atomic_helper_swap_state() | |
1374 | * and it's stall parameter, for when a driver's commit hooks look at the | |
1375 | * ->state pointers of struct &drm_crtc, &drm_plane or &drm_connector directly. | |
1376 | * | |
1377 | * Completion of the hardware commit step must be signalled using | |
1378 | * drm_atomic_helper_commit_hw_done(). After this step the driver is not allowed | |
1379 | * to read or change any permanent software or hardware modeset state. The only | |
1380 | * exception is state protected by other means than &drm_modeset_lock locks. | |
1381 | * Only the free standing @state with pointers to the old state structures can | |
1382 | * be inspected, e.g. to clean up old buffers using | |
1383 | * drm_atomic_helper_cleanup_planes(). | |
1384 | * | |
1385 | * At the very end, before cleaning up @state drivers must call | |
1386 | * drm_atomic_helper_commit_cleanup_done(). | |
1387 | * | |
1388 | * This is all implemented by in drm_atomic_helper_commit(), giving drivers a | |
1389 | * complete and esay-to-use default implementation of the atomic_commit() hook. | |
1390 | * | |
1391 | * The tracking of asynchronously executed and still pending commits is done | |
1392 | * using the core structure &drm_crtc_commit. | |
1393 | * | |
1394 | * By default there's no need to clean up resources allocated by this function | |
1395 | * explicitly: drm_atomic_state_default_clear() will take care of that | |
1396 | * automatically. | |
1397 | * | |
1398 | * Returns: | |
1399 | * | |
1400 | * 0 on success. -EBUSY when userspace schedules nonblocking commits too fast, | |
1401 | * -ENOMEM on allocation failures and -EINTR when a signal is pending. | |
1402 | */ | |
1403 | int drm_atomic_helper_setup_commit(struct drm_atomic_state *state, | |
1404 | bool nonblock) | |
1405 | { | |
1406 | struct drm_crtc *crtc; | |
1407 | struct drm_crtc_state *crtc_state; | |
1408 | struct drm_crtc_commit *commit; | |
1409 | int i, ret; | |
1410 | ||
1411 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1412 | commit = kzalloc(sizeof(*commit), GFP_KERNEL); | |
1413 | if (!commit) | |
1414 | return -ENOMEM; | |
1415 | ||
1416 | init_completion(&commit->flip_done); | |
1417 | init_completion(&commit->hw_done); | |
1418 | init_completion(&commit->cleanup_done); | |
1419 | INIT_LIST_HEAD(&commit->commit_entry); | |
1420 | kref_init(&commit->ref); | |
1421 | commit->crtc = crtc; | |
1422 | ||
1423 | state->crtcs[i].commit = commit; | |
1424 | ||
1425 | ret = stall_checks(crtc, nonblock); | |
1426 | if (ret) | |
1427 | return ret; | |
1428 | ||
1429 | /* Drivers only send out events when at least either current or | |
1430 | * new CRTC state is active. Complete right away if everything | |
1431 | * stays off. */ | |
1432 | if (!crtc->state->active && !crtc_state->active) { | |
1433 | complete_all(&commit->flip_done); | |
1434 | continue; | |
1435 | } | |
1436 | ||
1437 | /* Legacy cursor updates are fully unsynced. */ | |
1438 | if (state->legacy_cursor_update) { | |
1439 | complete_all(&commit->flip_done); | |
1440 | continue; | |
1441 | } | |
1442 | ||
1443 | if (!crtc_state->event) { | |
1444 | commit->event = kzalloc(sizeof(*commit->event), | |
1445 | GFP_KERNEL); | |
1446 | if (!commit->event) | |
1447 | return -ENOMEM; | |
1448 | ||
1449 | crtc_state->event = commit->event; | |
1450 | } | |
1451 | ||
1452 | crtc_state->event->base.completion = &commit->flip_done; | |
1453 | } | |
1454 | ||
1455 | return 0; | |
1456 | } | |
1457 | EXPORT_SYMBOL(drm_atomic_helper_setup_commit); | |
1458 | ||
1459 | ||
1460 | static struct drm_crtc_commit *preceeding_commit(struct drm_crtc *crtc) | |
1461 | { | |
1462 | struct drm_crtc_commit *commit; | |
1463 | int i = 0; | |
1464 | ||
1465 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) { | |
1466 | /* skip the first entry, that's the current commit */ | |
1467 | if (i == 1) | |
1468 | return commit; | |
1469 | i++; | |
1470 | } | |
1471 | ||
1472 | return NULL; | |
1473 | } | |
1474 | ||
1475 | /** | |
1476 | * drm_atomic_helper_wait_for_dependencies - wait for required preceeding commits | |
1477 | * @state: new modeset state to be committed | |
1478 | * | |
1479 | * This function waits for all preceeding commits that touch the same CRTC as | |
1480 | * @state to both be committed to the hardware (as signalled by | |
1481 | * drm_atomic_helper_commit_hw_done) and executed by the hardware (as signalled | |
1482 | * by calling drm_crtc_vblank_send_event on the event member of | |
1483 | * &drm_crtc_state). | |
1484 | * | |
1485 | * This is part of the atomic helper support for nonblocking commits, see | |
1486 | * drm_atomic_helper_setup_commit() for an overview. | |
1487 | */ | |
1488 | void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *state) | |
1489 | { | |
1490 | struct drm_crtc *crtc; | |
1491 | struct drm_crtc_state *crtc_state; | |
1492 | struct drm_crtc_commit *commit; | |
1493 | int i; | |
1494 | long ret; | |
1495 | ||
1496 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1497 | spin_lock(&crtc->commit_lock); | |
1498 | commit = preceeding_commit(crtc); | |
1499 | if (commit) | |
1500 | drm_crtc_commit_get(commit); | |
1501 | spin_unlock(&crtc->commit_lock); | |
1502 | ||
1503 | if (!commit) | |
1504 | continue; | |
1505 | ||
1506 | ret = wait_for_completion_timeout(&commit->hw_done, | |
1507 | 10*HZ); | |
1508 | if (ret == 0) | |
1509 | DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n", | |
1510 | crtc->base.id, crtc->name); | |
1511 | ||
1512 | /* Currently no support for overwriting flips, hence | |
1513 | * stall for previous one to execute completely. */ | |
1514 | ret = wait_for_completion_timeout(&commit->flip_done, | |
1515 | 10*HZ); | |
1516 | if (ret == 0) | |
1517 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
1518 | crtc->base.id, crtc->name); | |
1519 | ||
1520 | drm_crtc_commit_put(commit); | |
1521 | } | |
1522 | } | |
1523 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies); | |
1524 | ||
1525 | /** | |
1526 | * drm_atomic_helper_commit_hw_done - setup possible nonblocking commit | |
1527 | * @state: new modeset state to be committed | |
1528 | * | |
1529 | * This function is used to signal completion of the hardware commit step. After | |
1530 | * this step the driver is not allowed to read or change any permanent software | |
1531 | * or hardware modeset state. The only exception is state protected by other | |
1532 | * means than &drm_modeset_lock locks. | |
1533 | * | |
1534 | * Drivers should try to postpone any expensive or delayed cleanup work after | |
1535 | * this function is called. | |
1536 | * | |
1537 | * This is part of the atomic helper support for nonblocking commits, see | |
1538 | * drm_atomic_helper_setup_commit() for an overview. | |
1539 | */ | |
1540 | void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *state) | |
1541 | { | |
1542 | struct drm_crtc *crtc; | |
1543 | struct drm_crtc_state *crtc_state; | |
1544 | struct drm_crtc_commit *commit; | |
1545 | int i; | |
1546 | ||
1547 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1548 | commit = state->crtcs[i].commit; | |
1549 | if (!commit) | |
1550 | continue; | |
1551 | ||
1552 | /* backend must have consumed any event by now */ | |
1553 | WARN_ON(crtc->state->event); | |
1554 | spin_lock(&crtc->commit_lock); | |
1555 | complete_all(&commit->hw_done); | |
1556 | spin_unlock(&crtc->commit_lock); | |
1557 | } | |
1558 | } | |
1559 | EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done); | |
1560 | ||
1561 | /** | |
1562 | * drm_atomic_helper_commit_cleanup_done - signal completion of commit | |
1563 | * @state: new modeset state to be committed | |
1564 | * | |
1565 | * This signals completion of the atomic update @state, including any cleanup | |
1566 | * work. If used, it must be called right before calling | |
1567 | * drm_atomic_state_free(). | |
1568 | * | |
1569 | * This is part of the atomic helper support for nonblocking commits, see | |
1570 | * drm_atomic_helper_setup_commit() for an overview. | |
1571 | */ | |
1572 | void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *state) | |
1573 | { | |
1574 | struct drm_crtc *crtc; | |
1575 | struct drm_crtc_state *crtc_state; | |
1576 | struct drm_crtc_commit *commit; | |
1577 | int i; | |
1578 | long ret; | |
1579 | ||
1580 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1581 | commit = state->crtcs[i].commit; | |
1582 | if (WARN_ON(!commit)) | |
1583 | continue; | |
1584 | ||
1585 | spin_lock(&crtc->commit_lock); | |
1586 | complete_all(&commit->cleanup_done); | |
1587 | WARN_ON(!try_wait_for_completion(&commit->hw_done)); | |
1588 | ||
1589 | /* commit_list borrows our reference, need to remove before we | |
1590 | * clean up our drm_atomic_state. But only after it actually | |
1591 | * completed, otherwise subsequent commits won't stall properly. */ | |
7deef7f1 DV |
1592 | if (try_wait_for_completion(&commit->flip_done)) |
1593 | goto del_commit; | |
a095caa7 DV |
1594 | |
1595 | spin_unlock(&crtc->commit_lock); | |
1596 | ||
1597 | /* We must wait for the vblank event to signal our completion | |
1598 | * before releasing our reference, since the vblank work does | |
1599 | * not hold a reference of its own. */ | |
1600 | ret = wait_for_completion_timeout(&commit->flip_done, | |
1601 | 10*HZ); | |
1602 | if (ret == 0) | |
1603 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
1604 | crtc->base.id, crtc->name); | |
1605 | ||
1606 | spin_lock(&crtc->commit_lock); | |
7deef7f1 | 1607 | del_commit: |
a095caa7 DV |
1608 | list_del(&commit->commit_entry); |
1609 | spin_unlock(&crtc->commit_lock); | |
1610 | } | |
1611 | } | |
1612 | EXPORT_SYMBOL(drm_atomic_helper_commit_cleanup_done); | |
1613 | ||
c2fcd274 | 1614 | /** |
2e3afd47 | 1615 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 1616 | * @dev: DRM device |
2e3afd47 | 1617 | * @state: atomic state object with new state structures |
c2fcd274 DV |
1618 | * |
1619 | * This function prepares plane state, specifically framebuffers, for the new | |
1620 | * configuration. If any failure is encountered this function will call | |
1621 | * ->cleanup_fb on any already successfully prepared framebuffer. | |
1622 | * | |
1623 | * Returns: | |
1624 | * 0 on success, negative error code on failure. | |
1625 | */ | |
1626 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
1627 | struct drm_atomic_state *state) | |
1628 | { | |
be9174a4 DV |
1629 | struct drm_plane *plane; |
1630 | struct drm_plane_state *plane_state; | |
1631 | int ret, i, j; | |
c2fcd274 | 1632 | |
be9174a4 | 1633 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 1634 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
1635 | |
1636 | funcs = plane->helper_private; | |
1637 | ||
fcc60b41 KP |
1638 | if (!drm_atomic_helper_framebuffer_changed(dev, state, plane_state->crtc)) |
1639 | continue; | |
1640 | ||
844f9111 ML |
1641 | if (funcs->prepare_fb) { |
1642 | ret = funcs->prepare_fb(plane, plane_state); | |
c2fcd274 DV |
1643 | if (ret) |
1644 | goto fail; | |
1645 | } | |
1646 | } | |
1647 | ||
1648 | return 0; | |
1649 | ||
1650 | fail: | |
be9174a4 | 1651 | for_each_plane_in_state(state, plane, plane_state, j) { |
b5ceff20 | 1652 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1653 | |
be9174a4 | 1654 | if (j >= i) |
c2fcd274 DV |
1655 | continue; |
1656 | ||
fcc60b41 KP |
1657 | if (!drm_atomic_helper_framebuffer_changed(dev, state, plane_state->crtc)) |
1658 | continue; | |
1659 | ||
c2fcd274 DV |
1660 | funcs = plane->helper_private; |
1661 | ||
844f9111 ML |
1662 | if (funcs->cleanup_fb) |
1663 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1664 | } |
1665 | ||
1666 | return ret; | |
1667 | } | |
1668 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
1669 | ||
aef9dbb8 DV |
1670 | bool plane_crtc_active(struct drm_plane_state *state) |
1671 | { | |
1672 | return state->crtc && state->crtc->state->active; | |
1673 | } | |
1674 | ||
c2fcd274 DV |
1675 | /** |
1676 | * drm_atomic_helper_commit_planes - commit plane state | |
1677 | * @dev: DRM device | |
b0fcfc89 | 1678 | * @old_state: atomic state object with old state structures |
aef9dbb8 | 1679 | * @active_only: Only commit on active CRTC if set |
c2fcd274 DV |
1680 | * |
1681 | * This function commits the new plane state using the plane and atomic helper | |
1682 | * functions for planes and crtcs. It assumes that the atomic state has already | |
1683 | * been pushed into the relevant object state pointers, since this step can no | |
1684 | * longer fail. | |
1685 | * | |
b0fcfc89 | 1686 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 | 1687 | * crtcs need to be updated though. |
de28d021 ML |
1688 | * |
1689 | * Note that this function does all plane updates across all CRTCs in one step. | |
1690 | * If the hardware can't support this approach look at | |
1691 | * drm_atomic_helper_commit_planes_on_crtc() instead. | |
6e48ae32 DV |
1692 | * |
1693 | * Plane parameters can be updated by applications while the associated CRTC is | |
1694 | * disabled. The DRM/KMS core will store the parameters in the plane state, | |
1695 | * which will be available to the driver when the CRTC is turned on. As a result | |
1696 | * most drivers don't need to be immediately notified of plane updates for a | |
1697 | * disabled CRTC. | |
1698 | * | |
1699 | * Unless otherwise needed, drivers are advised to set the @active_only | |
1700 | * parameters to true in order not to receive plane update notifications related | |
1701 | * to a disabled CRTC. This avoids the need to manually ignore plane updates in | |
1702 | * driver code when the driver and/or hardware can't or just don't need to deal | |
1703 | * with updates on disabled CRTCs, for example when supporting runtime PM. | |
1704 | * | |
1705 | * The drm_atomic_helper_commit() default implementation only sets @active_only | |
1706 | * to false to most closely match the behaviour of the legacy helpers. This should | |
1707 | * not be copied blindly by drivers. | |
c2fcd274 DV |
1708 | */ |
1709 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
aef9dbb8 DV |
1710 | struct drm_atomic_state *old_state, |
1711 | bool active_only) | |
c2fcd274 | 1712 | { |
df63b999 ACO |
1713 | struct drm_crtc *crtc; |
1714 | struct drm_crtc_state *old_crtc_state; | |
1715 | struct drm_plane *plane; | |
1716 | struct drm_plane_state *old_plane_state; | |
c2fcd274 DV |
1717 | int i; |
1718 | ||
df63b999 | 1719 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1720 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1721 | |
1722 | funcs = crtc->helper_private; | |
1723 | ||
1724 | if (!funcs || !funcs->atomic_begin) | |
1725 | continue; | |
1726 | ||
aef9dbb8 DV |
1727 | if (active_only && !crtc->state->active) |
1728 | continue; | |
1729 | ||
613d2b27 | 1730 | funcs->atomic_begin(crtc, old_crtc_state); |
c2fcd274 DV |
1731 | } |
1732 | ||
df63b999 | 1733 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
b5ceff20 | 1734 | const struct drm_plane_helper_funcs *funcs; |
216c59d6 | 1735 | bool disabling; |
c2fcd274 DV |
1736 | |
1737 | funcs = plane->helper_private; | |
1738 | ||
3cad4b68 | 1739 | if (!funcs) |
c2fcd274 DV |
1740 | continue; |
1741 | ||
216c59d6 LP |
1742 | disabling = drm_atomic_plane_disabling(plane, old_plane_state); |
1743 | ||
1744 | if (active_only) { | |
1745 | /* | |
1746 | * Skip planes related to inactive CRTCs. If the plane | |
1747 | * is enabled use the state of the current CRTC. If the | |
1748 | * plane is being disabled use the state of the old | |
1749 | * CRTC to avoid skipping planes being disabled on an | |
1750 | * active CRTC. | |
1751 | */ | |
1752 | if (!disabling && !plane_crtc_active(plane->state)) | |
1753 | continue; | |
1754 | if (disabling && !plane_crtc_active(old_plane_state)) | |
1755 | continue; | |
1756 | } | |
aef9dbb8 | 1757 | |
407b8bd9 TR |
1758 | /* |
1759 | * Special-case disabling the plane if drivers support it. | |
1760 | */ | |
216c59d6 | 1761 | if (disabling && funcs->atomic_disable) |
407b8bd9 | 1762 | funcs->atomic_disable(plane, old_plane_state); |
216c59d6 | 1763 | else if (plane->state->crtc || disabling) |
407b8bd9 | 1764 | funcs->atomic_update(plane, old_plane_state); |
c2fcd274 DV |
1765 | } |
1766 | ||
df63b999 | 1767 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1768 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1769 | |
1770 | funcs = crtc->helper_private; | |
1771 | ||
1772 | if (!funcs || !funcs->atomic_flush) | |
1773 | continue; | |
1774 | ||
aef9dbb8 DV |
1775 | if (active_only && !crtc->state->active) |
1776 | continue; | |
1777 | ||
613d2b27 | 1778 | funcs->atomic_flush(crtc, old_crtc_state); |
c2fcd274 DV |
1779 | } |
1780 | } | |
1781 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1782 | ||
de28d021 ML |
1783 | /** |
1784 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc | |
1785 | * @old_crtc_state: atomic state object with the old crtc state | |
1786 | * | |
1787 | * This function commits the new plane state using the plane and atomic helper | |
1788 | * functions for planes on the specific crtc. It assumes that the atomic state | |
1789 | * has already been pushed into the relevant object state pointers, since this | |
1790 | * step can no longer fail. | |
1791 | * | |
1792 | * This function is useful when plane updates should be done crtc-by-crtc | |
1793 | * instead of one global step like drm_atomic_helper_commit_planes() does. | |
1794 | * | |
1795 | * This function can only be savely used when planes are not allowed to move | |
1796 | * between different CRTCs because this function doesn't handle inter-CRTC | |
1797 | * depencies. Callers need to ensure that either no such depencies exist, | |
1798 | * resolve them through ordering of commit calls or through some other means. | |
1799 | */ | |
1800 | void | |
1801 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) | |
1802 | { | |
1803 | const struct drm_crtc_helper_funcs *crtc_funcs; | |
1804 | struct drm_crtc *crtc = old_crtc_state->crtc; | |
1805 | struct drm_atomic_state *old_state = old_crtc_state->state; | |
1806 | struct drm_plane *plane; | |
1807 | unsigned plane_mask; | |
1808 | ||
1809 | plane_mask = old_crtc_state->plane_mask; | |
1810 | plane_mask |= crtc->state->plane_mask; | |
1811 | ||
1812 | crtc_funcs = crtc->helper_private; | |
1813 | if (crtc_funcs && crtc_funcs->atomic_begin) | |
613d2b27 | 1814 | crtc_funcs->atomic_begin(crtc, old_crtc_state); |
de28d021 ML |
1815 | |
1816 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { | |
1817 | struct drm_plane_state *old_plane_state = | |
1818 | drm_atomic_get_existing_plane_state(old_state, plane); | |
1819 | const struct drm_plane_helper_funcs *plane_funcs; | |
1820 | ||
1821 | plane_funcs = plane->helper_private; | |
1822 | ||
1823 | if (!old_plane_state || !plane_funcs) | |
1824 | continue; | |
1825 | ||
1826 | WARN_ON(plane->state->crtc && plane->state->crtc != crtc); | |
1827 | ||
1828 | if (drm_atomic_plane_disabling(plane, old_plane_state) && | |
1829 | plane_funcs->atomic_disable) | |
1830 | plane_funcs->atomic_disable(plane, old_plane_state); | |
1831 | else if (plane->state->crtc || | |
1832 | drm_atomic_plane_disabling(plane, old_plane_state)) | |
1833 | plane_funcs->atomic_update(plane, old_plane_state); | |
1834 | } | |
1835 | ||
1836 | if (crtc_funcs && crtc_funcs->atomic_flush) | |
613d2b27 | 1837 | crtc_funcs->atomic_flush(crtc, old_crtc_state); |
de28d021 ML |
1838 | } |
1839 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); | |
1840 | ||
6753ba97 JS |
1841 | /** |
1842 | * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes | |
1843 | * @crtc: CRTC | |
1844 | * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks | |
1845 | * | |
1846 | * Disables all planes associated with the given CRTC. This can be | |
1847 | * used for instance in the CRTC helper disable callback to disable | |
1848 | * all planes before shutting down the display pipeline. | |
1849 | * | |
1850 | * If the atomic-parameter is set the function calls the CRTC's | |
1851 | * atomic_begin hook before and atomic_flush hook after disabling the | |
1852 | * planes. | |
1853 | * | |
1854 | * It is a bug to call this function without having implemented the | |
1855 | * ->atomic_disable() plane hook. | |
1856 | */ | |
1857 | void drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc *crtc, | |
1858 | bool atomic) | |
1859 | { | |
1860 | const struct drm_crtc_helper_funcs *crtc_funcs = | |
1861 | crtc->helper_private; | |
1862 | struct drm_plane *plane; | |
1863 | ||
1864 | if (atomic && crtc_funcs && crtc_funcs->atomic_begin) | |
1865 | crtc_funcs->atomic_begin(crtc, NULL); | |
1866 | ||
1867 | drm_for_each_plane(plane, crtc->dev) { | |
1868 | const struct drm_plane_helper_funcs *plane_funcs = | |
1869 | plane->helper_private; | |
1870 | ||
1871 | if (plane->state->crtc != crtc || !plane_funcs) | |
1872 | continue; | |
1873 | ||
1874 | WARN_ON(!plane_funcs->atomic_disable); | |
1875 | if (plane_funcs->atomic_disable) | |
1876 | plane_funcs->atomic_disable(plane, NULL); | |
1877 | } | |
1878 | ||
1879 | if (atomic && crtc_funcs && crtc_funcs->atomic_flush) | |
1880 | crtc_funcs->atomic_flush(crtc, NULL); | |
1881 | } | |
1882 | EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); | |
1883 | ||
c2fcd274 DV |
1884 | /** |
1885 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1886 | * @dev: DRM device | |
1887 | * @old_state: atomic state object with old state structures | |
1888 | * | |
1889 | * This function cleans up plane state, specifically framebuffers, from the old | |
1890 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1891 | * be able to call this function. | |
1892 | * | |
1893 | * This function must also be called on the new state when the atomic update | |
1894 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1895 | */ | |
1896 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1897 | struct drm_atomic_state *old_state) | |
1898 | { | |
df63b999 ACO |
1899 | struct drm_plane *plane; |
1900 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
1901 | int i; |
1902 | ||
df63b999 | 1903 | for_each_plane_in_state(old_state, plane, plane_state, i) { |
b5ceff20 | 1904 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1905 | |
fcc60b41 KP |
1906 | if (!drm_atomic_helper_framebuffer_changed(dev, old_state, plane_state->crtc)) |
1907 | continue; | |
1908 | ||
c2fcd274 DV |
1909 | funcs = plane->helper_private; |
1910 | ||
844f9111 ML |
1911 | if (funcs->cleanup_fb) |
1912 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1913 | } |
1914 | } | |
1915 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1916 | ||
1917 | /** | |
1918 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
c2fcd274 | 1919 | * @state: atomic state |
5e84c269 | 1920 | * @stall: stall for proceeding commits |
c2fcd274 DV |
1921 | * |
1922 | * This function stores the atomic state into the current state pointers in all | |
1923 | * driver objects. It should be called after all failing steps have been done | |
1924 | * and succeeded, but before the actual hardware state is committed. | |
1925 | * | |
1926 | * For cleanup and error recovery the current state for all changed objects will | |
1927 | * be swaped into @state. | |
1928 | * | |
1929 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1930 | * | |
1931 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1932 | * | |
1933 | * 2. Do any other steps that might fail. | |
1934 | * | |
1935 | * 3. Put the staged state into the current state pointers with this function. | |
1936 | * | |
1937 | * 4. Actually commit the hardware state. | |
1938 | * | |
26196f7e | 1939 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
c2fcd274 | 1940 | * contains the old state. Also do any other cleanup required with that state. |
a095caa7 DV |
1941 | * |
1942 | * @stall must be set when nonblocking commits for this driver directly access | |
1943 | * the ->state pointer of &drm_plane, &drm_crtc or &drm_connector. With the | |
1944 | * current atomic helpers this is almost always the case, since the helpers | |
1945 | * don't pass the right state structures to the callbacks. | |
c2fcd274 | 1946 | */ |
5e84c269 DV |
1947 | void drm_atomic_helper_swap_state(struct drm_atomic_state *state, |
1948 | bool stall) | |
c2fcd274 DV |
1949 | { |
1950 | int i; | |
a095caa7 | 1951 | long ret; |
be9174a4 DV |
1952 | struct drm_connector *connector; |
1953 | struct drm_connector_state *conn_state; | |
1954 | struct drm_crtc *crtc; | |
1955 | struct drm_crtc_state *crtc_state; | |
1956 | struct drm_plane *plane; | |
1957 | struct drm_plane_state *plane_state; | |
a095caa7 DV |
1958 | struct drm_crtc_commit *commit; |
1959 | ||
1960 | if (stall) { | |
1961 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1962 | spin_lock(&crtc->commit_lock); | |
1963 | commit = list_first_entry_or_null(&crtc->commit_list, | |
1964 | struct drm_crtc_commit, commit_entry); | |
1965 | if (commit) | |
1966 | drm_crtc_commit_get(commit); | |
1967 | spin_unlock(&crtc->commit_lock); | |
1968 | ||
1969 | if (!commit) | |
1970 | continue; | |
1971 | ||
1972 | ret = wait_for_completion_timeout(&commit->hw_done, | |
1973 | 10*HZ); | |
1974 | if (ret == 0) | |
1975 | DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n", | |
1976 | crtc->base.id, crtc->name); | |
1977 | drm_crtc_commit_put(commit); | |
1978 | } | |
1979 | } | |
c2fcd274 | 1980 | |
be9174a4 | 1981 | for_each_connector_in_state(state, connector, conn_state, i) { |
c2fcd274 | 1982 | connector->state->state = state; |
63e83c1d | 1983 | swap(state->connectors[i].state, connector->state); |
c2fcd274 DV |
1984 | connector->state->state = NULL; |
1985 | } | |
1986 | ||
be9174a4 | 1987 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
c2fcd274 | 1988 | crtc->state->state = state; |
5d943aa6 | 1989 | swap(state->crtcs[i].state, crtc->state); |
c2fcd274 | 1990 | crtc->state->state = NULL; |
a095caa7 DV |
1991 | |
1992 | if (state->crtcs[i].commit) { | |
1993 | spin_lock(&crtc->commit_lock); | |
1994 | list_add(&state->crtcs[i].commit->commit_entry, | |
1995 | &crtc->commit_list); | |
1996 | spin_unlock(&crtc->commit_lock); | |
1997 | ||
1998 | state->crtcs[i].commit->event = NULL; | |
1999 | } | |
c2fcd274 DV |
2000 | } |
2001 | ||
be9174a4 | 2002 | for_each_plane_in_state(state, plane, plane_state, i) { |
c2fcd274 | 2003 | plane->state->state = state; |
b8b5342b | 2004 | swap(state->planes[i].state, plane->state); |
c2fcd274 DV |
2005 | plane->state->state = NULL; |
2006 | } | |
2007 | } | |
2008 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
2009 | |
2010 | /** | |
2011 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
2012 | * @plane: plane object to update | |
2013 | * @crtc: owning CRTC of owning plane | |
2014 | * @fb: framebuffer to flip onto plane | |
2015 | * @crtc_x: x offset of primary plane on crtc | |
2016 | * @crtc_y: y offset of primary plane on crtc | |
2017 | * @crtc_w: width of primary plane rectangle on crtc | |
2018 | * @crtc_h: height of primary plane rectangle on crtc | |
2019 | * @src_x: x offset of @fb for panning | |
2020 | * @src_y: y offset of @fb for panning | |
2021 | * @src_w: width of source rectangle in @fb | |
2022 | * @src_h: height of source rectangle in @fb | |
2023 | * | |
2024 | * Provides a default plane update handler using the atomic driver interface. | |
2025 | * | |
2026 | * RETURNS: | |
2027 | * Zero on success, error code on failure | |
2028 | */ | |
2029 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
2030 | struct drm_crtc *crtc, | |
2031 | struct drm_framebuffer *fb, | |
2032 | int crtc_x, int crtc_y, | |
2033 | unsigned int crtc_w, unsigned int crtc_h, | |
2034 | uint32_t src_x, uint32_t src_y, | |
2035 | uint32_t src_w, uint32_t src_h) | |
2036 | { | |
2037 | struct drm_atomic_state *state; | |
2038 | struct drm_plane_state *plane_state; | |
2039 | int ret = 0; | |
2040 | ||
2041 | state = drm_atomic_state_alloc(plane->dev); | |
2042 | if (!state) | |
2043 | return -ENOMEM; | |
2044 | ||
2045 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2046 | retry: | |
2047 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2048 | if (IS_ERR(plane_state)) { | |
2049 | ret = PTR_ERR(plane_state); | |
2050 | goto fail; | |
2051 | } | |
2052 | ||
07cc0ef6 | 2053 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
2054 | if (ret != 0) |
2055 | goto fail; | |
321ebf04 | 2056 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
2057 | plane_state->crtc_x = crtc_x; |
2058 | plane_state->crtc_y = crtc_y; | |
042652ed | 2059 | plane_state->crtc_w = crtc_w; |
02e6f379 | 2060 | plane_state->crtc_h = crtc_h; |
042652ed DV |
2061 | plane_state->src_x = src_x; |
2062 | plane_state->src_y = src_y; | |
042652ed | 2063 | plane_state->src_w = src_w; |
02e6f379 | 2064 | plane_state->src_h = src_h; |
042652ed | 2065 | |
3671c580 DV |
2066 | if (plane == crtc->cursor) |
2067 | state->legacy_cursor_update = true; | |
2068 | ||
042652ed DV |
2069 | ret = drm_atomic_commit(state); |
2070 | if (ret != 0) | |
2071 | goto fail; | |
2072 | ||
2073 | /* Driver takes ownership of state on successful commit. */ | |
2074 | return 0; | |
2075 | fail: | |
2076 | if (ret == -EDEADLK) | |
2077 | goto backoff; | |
2078 | ||
2079 | drm_atomic_state_free(state); | |
2080 | ||
2081 | return ret; | |
2082 | backoff: | |
042652ed | 2083 | drm_atomic_state_clear(state); |
6f75cea6 | 2084 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2085 | |
2086 | /* | |
2087 | * Someone might have exchanged the framebuffer while we dropped locks | |
2088 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2089 | * core does for us. | |
2090 | */ | |
2091 | plane->old_fb = plane->fb; | |
2092 | ||
2093 | goto retry; | |
2094 | } | |
2095 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
2096 | ||
2097 | /** | |
2098 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
2099 | * @plane: plane to disable | |
2100 | * | |
2101 | * Provides a default plane disable handler using the atomic driver interface. | |
2102 | * | |
2103 | * RETURNS: | |
2104 | * Zero on success, error code on failure | |
2105 | */ | |
2106 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
2107 | { | |
2108 | struct drm_atomic_state *state; | |
2109 | struct drm_plane_state *plane_state; | |
2110 | int ret = 0; | |
2111 | ||
aa54e2ee JSP |
2112 | /* |
2113 | * FIXME: Without plane->crtc set we can't get at the implicit legacy | |
2114 | * acquire context. The real fix will be to wire the acquire ctx through | |
2115 | * everywhere we need it, but meanwhile prevent chaos by just skipping | |
2116 | * this noop. The critical case is the cursor ioctls which a) only grab | |
2117 | * crtc/cursor-plane locks (so we need the crtc to get at the right | |
2118 | * acquire context) and b) can try to disable the plane multiple times. | |
2119 | */ | |
2120 | if (!plane->crtc) | |
2121 | return 0; | |
2122 | ||
042652ed DV |
2123 | state = drm_atomic_state_alloc(plane->dev); |
2124 | if (!state) | |
2125 | return -ENOMEM; | |
2126 | ||
2127 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
2128 | retry: | |
2129 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2130 | if (IS_ERR(plane_state)) { | |
2131 | ret = PTR_ERR(plane_state); | |
2132 | goto fail; | |
2133 | } | |
2134 | ||
24e79d0d ML |
2135 | if (plane_state->crtc && (plane == plane->crtc->cursor)) |
2136 | plane_state->state->legacy_cursor_update = true; | |
2137 | ||
bbb1e524 | 2138 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
042652ed DV |
2139 | if (ret != 0) |
2140 | goto fail; | |
f02ad907 | 2141 | |
042652ed DV |
2142 | ret = drm_atomic_commit(state); |
2143 | if (ret != 0) | |
2144 | goto fail; | |
2145 | ||
2146 | /* Driver takes ownership of state on successful commit. */ | |
2147 | return 0; | |
2148 | fail: | |
2149 | if (ret == -EDEADLK) | |
2150 | goto backoff; | |
2151 | ||
2152 | drm_atomic_state_free(state); | |
2153 | ||
2154 | return ret; | |
2155 | backoff: | |
042652ed | 2156 | drm_atomic_state_clear(state); |
6f75cea6 | 2157 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2158 | |
2159 | /* | |
2160 | * Someone might have exchanged the framebuffer while we dropped locks | |
2161 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2162 | * core does for us. | |
2163 | */ | |
2164 | plane->old_fb = plane->fb; | |
2165 | ||
2166 | goto retry; | |
2167 | } | |
2168 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
2169 | ||
bbb1e524 RC |
2170 | /* just used from fb-helper and atomic-helper: */ |
2171 | int __drm_atomic_helper_disable_plane(struct drm_plane *plane, | |
2172 | struct drm_plane_state *plane_state) | |
2173 | { | |
2174 | int ret; | |
2175 | ||
2176 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
2177 | if (ret != 0) | |
2178 | return ret; | |
2179 | ||
2180 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
2181 | plane_state->crtc_x = 0; | |
2182 | plane_state->crtc_y = 0; | |
bbb1e524 | 2183 | plane_state->crtc_w = 0; |
02e6f379 | 2184 | plane_state->crtc_h = 0; |
bbb1e524 RC |
2185 | plane_state->src_x = 0; |
2186 | plane_state->src_y = 0; | |
bbb1e524 | 2187 | plane_state->src_w = 0; |
02e6f379 | 2188 | plane_state->src_h = 0; |
bbb1e524 | 2189 | |
bbb1e524 RC |
2190 | return 0; |
2191 | } | |
2192 | ||
042652ed DV |
2193 | static int update_output_state(struct drm_atomic_state *state, |
2194 | struct drm_mode_set *set) | |
2195 | { | |
2196 | struct drm_device *dev = set->crtc->dev; | |
df63b999 ACO |
2197 | struct drm_crtc *crtc; |
2198 | struct drm_crtc_state *crtc_state; | |
2199 | struct drm_connector *connector; | |
042652ed | 2200 | struct drm_connector_state *conn_state; |
6ab520a2 | 2201 | int ret, i; |
042652ed DV |
2202 | |
2203 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
2204 | state->acquire_ctx); | |
2205 | if (ret) | |
2206 | return ret; | |
2207 | ||
6ab520a2 ML |
2208 | /* First disable all connectors on the target crtc. */ |
2209 | ret = drm_atomic_add_affected_connectors(state, set->crtc); | |
2210 | if (ret) | |
2211 | return ret; | |
042652ed | 2212 | |
df63b999 | 2213 | for_each_connector_in_state(state, connector, conn_state, i) { |
042652ed DV |
2214 | if (conn_state->crtc == set->crtc) { |
2215 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
2216 | NULL); | |
2217 | if (ret) | |
2218 | return ret; | |
2219 | } | |
6ab520a2 | 2220 | } |
042652ed | 2221 | |
6ab520a2 ML |
2222 | /* Then set all connectors from set->connectors on the target crtc */ |
2223 | for (i = 0; i < set->num_connectors; i++) { | |
2224 | conn_state = drm_atomic_get_connector_state(state, | |
2225 | set->connectors[i]); | |
2226 | if (IS_ERR(conn_state)) | |
2227 | return PTR_ERR(conn_state); | |
2228 | ||
2229 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
2230 | set->crtc); | |
2231 | if (ret) | |
2232 | return ret; | |
042652ed DV |
2233 | } |
2234 | ||
df63b999 | 2235 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
2236 | /* Don't update ->enable for the CRTC in the set_config request, |
2237 | * since a mismatch would indicate a bug in the upper layers. | |
2238 | * The actual modeset code later on will catch any | |
2239 | * inconsistencies here. */ | |
2240 | if (crtc == set->crtc) | |
2241 | continue; | |
2242 | ||
14de6c44 | 2243 | if (!crtc_state->connector_mask) { |
c30f55a7 LP |
2244 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, |
2245 | NULL); | |
2246 | if (ret < 0) | |
2247 | return ret; | |
2248 | ||
9b5edbf7 | 2249 | crtc_state->active = false; |
c30f55a7 | 2250 | } |
042652ed DV |
2251 | } |
2252 | ||
2253 | return 0; | |
2254 | } | |
2255 | ||
2256 | /** | |
2257 | * drm_atomic_helper_set_config - set a new config from userspace | |
2258 | * @set: mode set configuration | |
2259 | * | |
2260 | * Provides a default crtc set_config handler using the atomic driver interface. | |
2261 | * | |
2262 | * Returns: | |
2263 | * Returns 0 on success, negative errno numbers on failure. | |
2264 | */ | |
2265 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
2266 | { | |
2267 | struct drm_atomic_state *state; | |
2268 | struct drm_crtc *crtc = set->crtc; | |
042652ed DV |
2269 | int ret = 0; |
2270 | ||
2271 | state = drm_atomic_state_alloc(crtc->dev); | |
2272 | if (!state) | |
2273 | return -ENOMEM; | |
2274 | ||
40616a26 | 2275 | state->legacy_set_config = true; |
042652ed DV |
2276 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); |
2277 | retry: | |
bbb1e524 RC |
2278 | ret = __drm_atomic_helper_set_config(set, state); |
2279 | if (ret != 0) | |
042652ed | 2280 | goto fail; |
042652ed | 2281 | |
bbb1e524 RC |
2282 | ret = drm_atomic_commit(state); |
2283 | if (ret != 0) | |
e5b5341c | 2284 | goto fail; |
bbb1e524 RC |
2285 | |
2286 | /* Driver takes ownership of state on successful commit. */ | |
2287 | return 0; | |
2288 | fail: | |
2289 | if (ret == -EDEADLK) | |
2290 | goto backoff; | |
2291 | ||
2292 | drm_atomic_state_free(state); | |
2293 | ||
2294 | return ret; | |
2295 | backoff: | |
2296 | drm_atomic_state_clear(state); | |
2297 | drm_atomic_legacy_backoff(state); | |
2298 | ||
2299 | /* | |
2300 | * Someone might have exchanged the framebuffer while we dropped locks | |
2301 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2302 | * core does for us. | |
2303 | */ | |
2304 | crtc->primary->old_fb = crtc->primary->fb; | |
2305 | ||
2306 | goto retry; | |
2307 | } | |
2308 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
2309 | ||
2310 | /* just used from fb-helper and atomic-helper: */ | |
2311 | int __drm_atomic_helper_set_config(struct drm_mode_set *set, | |
2312 | struct drm_atomic_state *state) | |
2313 | { | |
2314 | struct drm_crtc_state *crtc_state; | |
2315 | struct drm_plane_state *primary_state; | |
2316 | struct drm_crtc *crtc = set->crtc; | |
83926117 | 2317 | int hdisplay, vdisplay; |
bbb1e524 RC |
2318 | int ret; |
2319 | ||
2320 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2321 | if (IS_ERR(crtc_state)) | |
2322 | return PTR_ERR(crtc_state); | |
2323 | ||
2324 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); | |
2325 | if (IS_ERR(primary_state)) | |
2326 | return PTR_ERR(primary_state); | |
e5b5341c | 2327 | |
042652ed DV |
2328 | if (!set->mode) { |
2329 | WARN_ON(set->fb); | |
2330 | WARN_ON(set->num_connectors); | |
2331 | ||
819364da DS |
2332 | ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); |
2333 | if (ret != 0) | |
bbb1e524 | 2334 | return ret; |
819364da | 2335 | |
eab3bbef | 2336 | crtc_state->active = false; |
e5b5341c | 2337 | |
07cc0ef6 | 2338 | ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
e5b5341c | 2339 | if (ret != 0) |
bbb1e524 | 2340 | return ret; |
e5b5341c RC |
2341 | |
2342 | drm_atomic_set_fb_for_plane(primary_state, NULL); | |
2343 | ||
042652ed DV |
2344 | goto commit; |
2345 | } | |
2346 | ||
2347 | WARN_ON(!set->fb); | |
2348 | WARN_ON(!set->num_connectors); | |
2349 | ||
819364da DS |
2350 | ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); |
2351 | if (ret != 0) | |
bbb1e524 | 2352 | return ret; |
819364da | 2353 | |
eab3bbef | 2354 | crtc_state->active = true; |
042652ed | 2355 | |
07cc0ef6 | 2356 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
042652ed | 2357 | if (ret != 0) |
bbb1e524 RC |
2358 | return ret; |
2359 | ||
83926117 VS |
2360 | drm_crtc_get_hv_timing(set->mode, &hdisplay, &vdisplay); |
2361 | ||
321ebf04 | 2362 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
042652ed DV |
2363 | primary_state->crtc_x = 0; |
2364 | primary_state->crtc_y = 0; | |
83926117 | 2365 | primary_state->crtc_w = hdisplay; |
02e6f379 | 2366 | primary_state->crtc_h = vdisplay; |
042652ed DV |
2367 | primary_state->src_x = set->x << 16; |
2368 | primary_state->src_y = set->y << 16; | |
31ad61e4 | 2369 | if (primary_state->rotation & (DRM_ROTATE_90 | DRM_ROTATE_270)) { |
83926117 | 2370 | primary_state->src_w = vdisplay << 16; |
02e6f379 | 2371 | primary_state->src_h = hdisplay << 16; |
41121248 | 2372 | } else { |
83926117 | 2373 | primary_state->src_w = hdisplay << 16; |
02e6f379 | 2374 | primary_state->src_h = vdisplay << 16; |
41121248 | 2375 | } |
042652ed DV |
2376 | |
2377 | commit: | |
2378 | ret = update_output_state(state, set); | |
2379 | if (ret) | |
bbb1e524 | 2380 | return ret; |
042652ed | 2381 | |
042652ed | 2382 | return 0; |
042652ed | 2383 | } |
042652ed | 2384 | |
14942760 TR |
2385 | /** |
2386 | * drm_atomic_helper_disable_all - disable all currently active outputs | |
2387 | * @dev: DRM device | |
2388 | * @ctx: lock acquisition context | |
2389 | * | |
2390 | * Loops through all connectors, finding those that aren't turned off and then | |
2391 | * turns them off by setting their DPMS mode to OFF and deactivating the CRTC | |
2392 | * that they are connected to. | |
2393 | * | |
2394 | * This is used for example in suspend/resume to disable all currently active | |
2395 | * functions when suspending. | |
2396 | * | |
2397 | * Note that if callers haven't already acquired all modeset locks this might | |
2398 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
2399 | * | |
2400 | * Returns: | |
2401 | * 0 on success or a negative error code on failure. | |
2402 | * | |
2403 | * See also: | |
2404 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
2405 | */ | |
2406 | int drm_atomic_helper_disable_all(struct drm_device *dev, | |
2407 | struct drm_modeset_acquire_ctx *ctx) | |
2408 | { | |
2409 | struct drm_atomic_state *state; | |
2410 | struct drm_connector *conn; | |
2411 | int err; | |
2412 | ||
2413 | state = drm_atomic_state_alloc(dev); | |
2414 | if (!state) | |
2415 | return -ENOMEM; | |
2416 | ||
2417 | state->acquire_ctx = ctx; | |
2418 | ||
2419 | drm_for_each_connector(conn, dev) { | |
2420 | struct drm_crtc *crtc = conn->state->crtc; | |
2421 | struct drm_crtc_state *crtc_state; | |
2422 | ||
2423 | if (!crtc || conn->dpms != DRM_MODE_DPMS_ON) | |
2424 | continue; | |
2425 | ||
2426 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2427 | if (IS_ERR(crtc_state)) { | |
2428 | err = PTR_ERR(crtc_state); | |
2429 | goto free; | |
2430 | } | |
2431 | ||
2432 | crtc_state->active = false; | |
2433 | } | |
2434 | ||
2435 | err = drm_atomic_commit(state); | |
2436 | ||
2437 | free: | |
2438 | if (err < 0) | |
2439 | drm_atomic_state_free(state); | |
2440 | ||
2441 | return err; | |
2442 | } | |
2443 | EXPORT_SYMBOL(drm_atomic_helper_disable_all); | |
2444 | ||
2445 | /** | |
2446 | * drm_atomic_helper_suspend - subsystem-level suspend helper | |
2447 | * @dev: DRM device | |
2448 | * | |
2449 | * Duplicates the current atomic state, disables all active outputs and then | |
2450 | * returns a pointer to the original atomic state to the caller. Drivers can | |
2451 | * pass this pointer to the drm_atomic_helper_resume() helper upon resume to | |
2452 | * restore the output configuration that was active at the time the system | |
2453 | * entered suspend. | |
2454 | * | |
2455 | * Note that it is potentially unsafe to use this. The atomic state object | |
2456 | * returned by this function is assumed to be persistent. Drivers must ensure | |
2457 | * that this holds true. Before calling this function, drivers must make sure | |
2458 | * to suspend fbdev emulation so that nothing can be using the device. | |
2459 | * | |
2460 | * Returns: | |
2461 | * A pointer to a copy of the state before suspend on success or an ERR_PTR()- | |
2462 | * encoded error code on failure. Drivers should store the returned atomic | |
2463 | * state object and pass it to the drm_atomic_helper_resume() helper upon | |
2464 | * resume. | |
2465 | * | |
2466 | * See also: | |
2467 | * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), | |
2468 | * drm_atomic_helper_resume() | |
2469 | */ | |
2470 | struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) | |
2471 | { | |
2472 | struct drm_modeset_acquire_ctx ctx; | |
2473 | struct drm_atomic_state *state; | |
2474 | int err; | |
2475 | ||
2476 | drm_modeset_acquire_init(&ctx, 0); | |
2477 | ||
2478 | retry: | |
2479 | err = drm_modeset_lock_all_ctx(dev, &ctx); | |
2480 | if (err < 0) { | |
2481 | state = ERR_PTR(err); | |
2482 | goto unlock; | |
2483 | } | |
2484 | ||
2485 | state = drm_atomic_helper_duplicate_state(dev, &ctx); | |
2486 | if (IS_ERR(state)) | |
2487 | goto unlock; | |
2488 | ||
2489 | err = drm_atomic_helper_disable_all(dev, &ctx); | |
2490 | if (err < 0) { | |
2491 | drm_atomic_state_free(state); | |
2492 | state = ERR_PTR(err); | |
2493 | goto unlock; | |
2494 | } | |
2495 | ||
2496 | unlock: | |
2497 | if (PTR_ERR(state) == -EDEADLK) { | |
2498 | drm_modeset_backoff(&ctx); | |
2499 | goto retry; | |
2500 | } | |
2501 | ||
2502 | drm_modeset_drop_locks(&ctx); | |
2503 | drm_modeset_acquire_fini(&ctx); | |
2504 | return state; | |
2505 | } | |
2506 | EXPORT_SYMBOL(drm_atomic_helper_suspend); | |
2507 | ||
2508 | /** | |
2509 | * drm_atomic_helper_resume - subsystem-level resume helper | |
2510 | * @dev: DRM device | |
2511 | * @state: atomic state to resume to | |
2512 | * | |
2513 | * Calls drm_mode_config_reset() to synchronize hardware and software states, | |
2514 | * grabs all modeset locks and commits the atomic state object. This can be | |
2515 | * used in conjunction with the drm_atomic_helper_suspend() helper to | |
2516 | * implement suspend/resume for drivers that support atomic mode-setting. | |
2517 | * | |
2518 | * Returns: | |
2519 | * 0 on success or a negative error code on failure. | |
2520 | * | |
2521 | * See also: | |
2522 | * drm_atomic_helper_suspend() | |
2523 | */ | |
2524 | int drm_atomic_helper_resume(struct drm_device *dev, | |
2525 | struct drm_atomic_state *state) | |
2526 | { | |
2527 | struct drm_mode_config *config = &dev->mode_config; | |
2528 | int err; | |
2529 | ||
2530 | drm_mode_config_reset(dev); | |
2531 | drm_modeset_lock_all(dev); | |
2532 | state->acquire_ctx = config->acquire_ctx; | |
2533 | err = drm_atomic_commit(state); | |
2534 | drm_modeset_unlock_all(dev); | |
2535 | ||
2536 | return err; | |
2537 | } | |
2538 | EXPORT_SYMBOL(drm_atomic_helper_resume); | |
2539 | ||
042652ed | 2540 | /** |
7f50002f | 2541 | * drm_atomic_helper_crtc_set_property - helper for crtc properties |
042652ed DV |
2542 | * @crtc: DRM crtc |
2543 | * @property: DRM property | |
2544 | * @val: value of property | |
2545 | * | |
7f50002f LP |
2546 | * Provides a default crtc set_property handler using the atomic driver |
2547 | * interface. | |
042652ed DV |
2548 | * |
2549 | * RETURNS: | |
2550 | * Zero on success, error code on failure | |
2551 | */ | |
2552 | int | |
2553 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
2554 | struct drm_property *property, | |
2555 | uint64_t val) | |
2556 | { | |
2557 | struct drm_atomic_state *state; | |
2558 | struct drm_crtc_state *crtc_state; | |
2559 | int ret = 0; | |
2560 | ||
2561 | state = drm_atomic_state_alloc(crtc->dev); | |
2562 | if (!state) | |
2563 | return -ENOMEM; | |
2564 | ||
2565 | /* ->set_property is always called with all locks held. */ | |
2566 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
2567 | retry: | |
2568 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2569 | if (IS_ERR(crtc_state)) { | |
2570 | ret = PTR_ERR(crtc_state); | |
2571 | goto fail; | |
2572 | } | |
2573 | ||
40ecc694 RC |
2574 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
2575 | property, val); | |
042652ed DV |
2576 | if (ret) |
2577 | goto fail; | |
2578 | ||
2579 | ret = drm_atomic_commit(state); | |
2580 | if (ret != 0) | |
2581 | goto fail; | |
2582 | ||
2583 | /* Driver takes ownership of state on successful commit. */ | |
2584 | return 0; | |
2585 | fail: | |
2586 | if (ret == -EDEADLK) | |
2587 | goto backoff; | |
2588 | ||
2589 | drm_atomic_state_free(state); | |
2590 | ||
2591 | return ret; | |
2592 | backoff: | |
042652ed | 2593 | drm_atomic_state_clear(state); |
6f75cea6 | 2594 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2595 | |
2596 | goto retry; | |
2597 | } | |
2598 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
2599 | ||
2600 | /** | |
7f50002f | 2601 | * drm_atomic_helper_plane_set_property - helper for plane properties |
042652ed DV |
2602 | * @plane: DRM plane |
2603 | * @property: DRM property | |
2604 | * @val: value of property | |
2605 | * | |
7f50002f LP |
2606 | * Provides a default plane set_property handler using the atomic driver |
2607 | * interface. | |
042652ed DV |
2608 | * |
2609 | * RETURNS: | |
2610 | * Zero on success, error code on failure | |
2611 | */ | |
2612 | int | |
2613 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
2614 | struct drm_property *property, | |
2615 | uint64_t val) | |
2616 | { | |
2617 | struct drm_atomic_state *state; | |
2618 | struct drm_plane_state *plane_state; | |
2619 | int ret = 0; | |
2620 | ||
2621 | state = drm_atomic_state_alloc(plane->dev); | |
2622 | if (!state) | |
2623 | return -ENOMEM; | |
2624 | ||
2625 | /* ->set_property is always called with all locks held. */ | |
2626 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
2627 | retry: | |
2628 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2629 | if (IS_ERR(plane_state)) { | |
2630 | ret = PTR_ERR(plane_state); | |
2631 | goto fail; | |
2632 | } | |
2633 | ||
40ecc694 RC |
2634 | ret = drm_atomic_plane_set_property(plane, plane_state, |
2635 | property, val); | |
042652ed DV |
2636 | if (ret) |
2637 | goto fail; | |
2638 | ||
2639 | ret = drm_atomic_commit(state); | |
2640 | if (ret != 0) | |
2641 | goto fail; | |
2642 | ||
2643 | /* Driver takes ownership of state on successful commit. */ | |
2644 | return 0; | |
2645 | fail: | |
2646 | if (ret == -EDEADLK) | |
2647 | goto backoff; | |
2648 | ||
2649 | drm_atomic_state_free(state); | |
2650 | ||
2651 | return ret; | |
2652 | backoff: | |
042652ed | 2653 | drm_atomic_state_clear(state); |
6f75cea6 | 2654 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2655 | |
2656 | goto retry; | |
2657 | } | |
2658 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
2659 | ||
2660 | /** | |
7f50002f | 2661 | * drm_atomic_helper_connector_set_property - helper for connector properties |
042652ed DV |
2662 | * @connector: DRM connector |
2663 | * @property: DRM property | |
2664 | * @val: value of property | |
2665 | * | |
7f50002f LP |
2666 | * Provides a default connector set_property handler using the atomic driver |
2667 | * interface. | |
042652ed DV |
2668 | * |
2669 | * RETURNS: | |
2670 | * Zero on success, error code on failure | |
2671 | */ | |
2672 | int | |
2673 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
2674 | struct drm_property *property, | |
2675 | uint64_t val) | |
2676 | { | |
2677 | struct drm_atomic_state *state; | |
2678 | struct drm_connector_state *connector_state; | |
2679 | int ret = 0; | |
2680 | ||
2681 | state = drm_atomic_state_alloc(connector->dev); | |
2682 | if (!state) | |
2683 | return -ENOMEM; | |
2684 | ||
2685 | /* ->set_property is always called with all locks held. */ | |
2686 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
2687 | retry: | |
2688 | connector_state = drm_atomic_get_connector_state(state, connector); | |
2689 | if (IS_ERR(connector_state)) { | |
2690 | ret = PTR_ERR(connector_state); | |
2691 | goto fail; | |
2692 | } | |
2693 | ||
40ecc694 RC |
2694 | ret = drm_atomic_connector_set_property(connector, connector_state, |
2695 | property, val); | |
042652ed DV |
2696 | if (ret) |
2697 | goto fail; | |
2698 | ||
2699 | ret = drm_atomic_commit(state); | |
2700 | if (ret != 0) | |
2701 | goto fail; | |
2702 | ||
2703 | /* Driver takes ownership of state on successful commit. */ | |
2704 | return 0; | |
2705 | fail: | |
2706 | if (ret == -EDEADLK) | |
2707 | goto backoff; | |
2708 | ||
2709 | drm_atomic_state_free(state); | |
2710 | ||
2711 | return ret; | |
2712 | backoff: | |
042652ed | 2713 | drm_atomic_state_clear(state); |
6f75cea6 | 2714 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2715 | |
2716 | goto retry; | |
2717 | } | |
2718 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 DV |
2719 | |
2720 | /** | |
2721 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
2722 | * @crtc: DRM crtc | |
2723 | * @fb: DRM framebuffer | |
2724 | * @event: optional DRM event to signal upon completion | |
2725 | * @flags: flip flags for non-vblank sync'ed updates | |
2726 | * | |
2727 | * Provides a default page flip implementation using the atomic driver interface. | |
2728 | * | |
2729 | * Note that for now so called async page flips (i.e. updates which are not | |
2730 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
2731 | * no provisions for this yet. | |
2732 | * | |
2733 | * Returns: | |
2734 | * Returns 0 on success, negative errno numbers on failure. | |
2735 | */ | |
2736 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
2737 | struct drm_framebuffer *fb, | |
2738 | struct drm_pending_vblank_event *event, | |
2739 | uint32_t flags) | |
2740 | { | |
2741 | struct drm_plane *plane = crtc->primary; | |
2742 | struct drm_atomic_state *state; | |
2743 | struct drm_plane_state *plane_state; | |
2744 | struct drm_crtc_state *crtc_state; | |
2745 | int ret = 0; | |
2746 | ||
2747 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
2748 | return -EINVAL; | |
2749 | ||
2750 | state = drm_atomic_state_alloc(plane->dev); | |
2751 | if (!state) | |
2752 | return -ENOMEM; | |
2753 | ||
2754 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2755 | retry: | |
2756 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2757 | if (IS_ERR(crtc_state)) { | |
2758 | ret = PTR_ERR(crtc_state); | |
2759 | goto fail; | |
2760 | } | |
2761 | crtc_state->event = event; | |
2762 | ||
2763 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2764 | if (IS_ERR(plane_state)) { | |
2765 | ret = PTR_ERR(plane_state); | |
2766 | goto fail; | |
2767 | } | |
2768 | ||
07cc0ef6 | 2769 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
8bc0f312 DV |
2770 | if (ret != 0) |
2771 | goto fail; | |
321ebf04 | 2772 | drm_atomic_set_fb_for_plane(plane_state, fb); |
8bc0f312 | 2773 | |
4cba6850 DV |
2774 | /* Make sure we don't accidentally do a full modeset. */ |
2775 | state->allow_modeset = false; | |
2776 | if (!crtc_state->active) { | |
2777 | DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n", | |
2778 | crtc->base.id); | |
2779 | ret = -EINVAL; | |
2780 | goto fail; | |
2781 | } | |
2782 | ||
b837ba0a | 2783 | ret = drm_atomic_nonblocking_commit(state); |
8bc0f312 DV |
2784 | if (ret != 0) |
2785 | goto fail; | |
2786 | ||
b837ba0a | 2787 | /* Driver takes ownership of state on successful commit. */ |
8bc0f312 DV |
2788 | return 0; |
2789 | fail: | |
2790 | if (ret == -EDEADLK) | |
2791 | goto backoff; | |
2792 | ||
2793 | drm_atomic_state_free(state); | |
2794 | ||
2795 | return ret; | |
2796 | backoff: | |
8bc0f312 | 2797 | drm_atomic_state_clear(state); |
6f75cea6 | 2798 | drm_atomic_legacy_backoff(state); |
8bc0f312 DV |
2799 | |
2800 | /* | |
2801 | * Someone might have exchanged the framebuffer while we dropped locks | |
2802 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2803 | * core does for us. | |
2804 | */ | |
2805 | plane->old_fb = plane->fb; | |
2806 | ||
2807 | goto retry; | |
2808 | } | |
2809 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
d461701c | 2810 | |
b486e0e6 DV |
2811 | /** |
2812 | * drm_atomic_helper_connector_dpms() - connector dpms helper implementation | |
2813 | * @connector: affected connector | |
2814 | * @mode: DPMS mode | |
2815 | * | |
2816 | * This is the main helper function provided by the atomic helper framework for | |
2817 | * implementing the legacy DPMS connector interface. It computes the new desired | |
2818 | * ->active state for the corresponding CRTC (if the connector is enabled) and | |
2e7a5701 | 2819 | * updates it. |
9a69a9ac ML |
2820 | * |
2821 | * Returns: | |
2822 | * Returns 0 on success, negative errno numbers on failure. | |
b486e0e6 | 2823 | */ |
9a69a9ac ML |
2824 | int drm_atomic_helper_connector_dpms(struct drm_connector *connector, |
2825 | int mode) | |
b486e0e6 DV |
2826 | { |
2827 | struct drm_mode_config *config = &connector->dev->mode_config; | |
2828 | struct drm_atomic_state *state; | |
2829 | struct drm_crtc_state *crtc_state; | |
2830 | struct drm_crtc *crtc; | |
2831 | struct drm_connector *tmp_connector; | |
2832 | int ret; | |
2833 | bool active = false; | |
9a69a9ac | 2834 | int old_mode = connector->dpms; |
b486e0e6 DV |
2835 | |
2836 | if (mode != DRM_MODE_DPMS_ON) | |
2837 | mode = DRM_MODE_DPMS_OFF; | |
2838 | ||
2839 | connector->dpms = mode; | |
2840 | crtc = connector->state->crtc; | |
2841 | ||
2842 | if (!crtc) | |
9a69a9ac | 2843 | return 0; |
b486e0e6 | 2844 | |
b486e0e6 DV |
2845 | state = drm_atomic_state_alloc(connector->dev); |
2846 | if (!state) | |
9a69a9ac | 2847 | return -ENOMEM; |
b486e0e6 DV |
2848 | |
2849 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2850 | retry: | |
2851 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
9a69a9ac ML |
2852 | if (IS_ERR(crtc_state)) { |
2853 | ret = PTR_ERR(crtc_state); | |
2854 | goto fail; | |
2855 | } | |
b486e0e6 DV |
2856 | |
2857 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
2858 | ||
9a9f5ce8 | 2859 | drm_for_each_connector(tmp_connector, connector->dev) { |
0388df05 | 2860 | if (tmp_connector->state->crtc != crtc) |
b486e0e6 DV |
2861 | continue; |
2862 | ||
0388df05 | 2863 | if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { |
b486e0e6 DV |
2864 | active = true; |
2865 | break; | |
2866 | } | |
2867 | } | |
2868 | crtc_state->active = active; | |
2869 | ||
2870 | ret = drm_atomic_commit(state); | |
2871 | if (ret != 0) | |
2872 | goto fail; | |
2873 | ||
9a69a9ac ML |
2874 | /* Driver takes ownership of state on successful commit. */ |
2875 | return 0; | |
b486e0e6 DV |
2876 | fail: |
2877 | if (ret == -EDEADLK) | |
2878 | goto backoff; | |
2879 | ||
9a69a9ac | 2880 | connector->dpms = old_mode; |
b486e0e6 DV |
2881 | drm_atomic_state_free(state); |
2882 | ||
9a69a9ac | 2883 | return ret; |
b486e0e6 DV |
2884 | backoff: |
2885 | drm_atomic_state_clear(state); | |
2886 | drm_atomic_legacy_backoff(state); | |
2887 | ||
2888 | goto retry; | |
2889 | } | |
2890 | EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); | |
2891 | ||
9ecb5498 NT |
2892 | /** |
2893 | * drm_atomic_helper_best_encoder - Helper for &drm_connector_helper_funcs | |
2894 | * ->best_encoder callback | |
2895 | * @connector: Connector control structure | |
2896 | * | |
2897 | * This is a &drm_connector_helper_funcs ->best_encoder callback helper for | |
2898 | * connectors that support exactly 1 encoder, statically determined at driver | |
2899 | * init time. | |
2900 | */ | |
2901 | struct drm_encoder * | |
2902 | drm_atomic_helper_best_encoder(struct drm_connector *connector) | |
2903 | { | |
2904 | WARN_ON(connector->encoder_ids[1]); | |
2905 | return drm_encoder_find(connector->dev, connector->encoder_ids[0]); | |
2906 | } | |
2907 | EXPORT_SYMBOL(drm_atomic_helper_best_encoder); | |
2908 | ||
3150c7d0 DV |
2909 | /** |
2910 | * DOC: atomic state reset and initialization | |
2911 | * | |
2912 | * Both the drm core and the atomic helpers assume that there is always the full | |
2913 | * and correct atomic software state for all connectors, CRTCs and planes | |
2914 | * available. Which is a bit a problem on driver load and also after system | |
2915 | * suspend. One way to solve this is to have a hardware state read-out | |
2916 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
2917 | * driver). | |
2918 | * | |
2919 | * The simpler solution is to just reset the software state to everything off, | |
2920 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
2921 | * the atomic helpers provide default reset implementations for all hooks. | |
7f8ee3e5 DV |
2922 | * |
2923 | * On the upside the precise state tracking of atomic simplifies system suspend | |
2924 | * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe | |
2925 | * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume(). | |
2926 | * For other drivers the building blocks are split out, see the documentation | |
2927 | * for these functions. | |
3150c7d0 DV |
2928 | */ |
2929 | ||
d461701c DV |
2930 | /** |
2931 | * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs | |
2932 | * @crtc: drm CRTC | |
2933 | * | |
2934 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
2935 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2936 | */ | |
2937 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
2938 | { | |
b0b5511b | 2939 | if (crtc->state) |
ec2dc6a0 | 2940 | __drm_atomic_helper_crtc_destroy_state(crtc->state); |
b0b5511b | 2941 | |
d461701c DV |
2942 | kfree(crtc->state); |
2943 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
07cc0ef6 DV |
2944 | |
2945 | if (crtc->state) | |
2946 | crtc->state->crtc = crtc; | |
d461701c DV |
2947 | } |
2948 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
2949 | ||
f5e7840b TR |
2950 | /** |
2951 | * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state | |
2952 | * @crtc: CRTC object | |
2953 | * @state: atomic CRTC state | |
2954 | * | |
2955 | * Copies atomic state from a CRTC's current state and resets inferred values. | |
2956 | * This is useful for drivers that subclass the CRTC state. | |
2957 | */ | |
2958 | void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc, | |
2959 | struct drm_crtc_state *state) | |
2960 | { | |
2961 | memcpy(state, crtc->state, sizeof(*state)); | |
2962 | ||
99cf4a29 DS |
2963 | if (state->mode_blob) |
2964 | drm_property_reference_blob(state->mode_blob); | |
5488dc16 LL |
2965 | if (state->degamma_lut) |
2966 | drm_property_reference_blob(state->degamma_lut); | |
2967 | if (state->ctm) | |
2968 | drm_property_reference_blob(state->ctm); | |
2969 | if (state->gamma_lut) | |
2970 | drm_property_reference_blob(state->gamma_lut); | |
f5e7840b TR |
2971 | state->mode_changed = false; |
2972 | state->active_changed = false; | |
2973 | state->planes_changed = false; | |
fc596660 | 2974 | state->connectors_changed = false; |
5488dc16 | 2975 | state->color_mgmt_changed = false; |
44d1240d | 2976 | state->zpos_changed = false; |
f5e7840b TR |
2977 | state->event = NULL; |
2978 | } | |
2979 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state); | |
2980 | ||
d461701c DV |
2981 | /** |
2982 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
2983 | * @crtc: drm CRTC | |
2984 | * | |
2985 | * Default CRTC state duplicate hook for drivers which don't have their own | |
2986 | * subclassed CRTC state structure. | |
2987 | */ | |
2988 | struct drm_crtc_state * | |
2989 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
2990 | { | |
2991 | struct drm_crtc_state *state; | |
2992 | ||
2993 | if (WARN_ON(!crtc->state)) | |
2994 | return NULL; | |
2995 | ||
f5e7840b TR |
2996 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2997 | if (state) | |
2998 | __drm_atomic_helper_crtc_duplicate_state(crtc, state); | |
d461701c DV |
2999 | |
3000 | return state; | |
3001 | } | |
3002 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
3003 | ||
f5e7840b TR |
3004 | /** |
3005 | * __drm_atomic_helper_crtc_destroy_state - release CRTC state | |
f5e7840b TR |
3006 | * @state: CRTC state object to release |
3007 | * | |
3008 | * Releases all resources stored in the CRTC state without actually freeing | |
3009 | * the memory of the CRTC state. This is useful for drivers that subclass the | |
3010 | * CRTC state. | |
3011 | */ | |
ec2dc6a0 | 3012 | void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state) |
f5e7840b | 3013 | { |
5f911905 | 3014 | drm_property_unreference_blob(state->mode_blob); |
5488dc16 LL |
3015 | drm_property_unreference_blob(state->degamma_lut); |
3016 | drm_property_unreference_blob(state->ctm); | |
3017 | drm_property_unreference_blob(state->gamma_lut); | |
f5e7840b TR |
3018 | } |
3019 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); | |
3020 | ||
d461701c DV |
3021 | /** |
3022 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
3023 | * @crtc: drm CRTC | |
3024 | * @state: CRTC state object to release | |
3025 | * | |
3026 | * Default CRTC state destroy hook for drivers which don't have their own | |
3027 | * subclassed CRTC state structure. | |
3028 | */ | |
3029 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
3030 | struct drm_crtc_state *state) | |
3031 | { | |
ec2dc6a0 | 3032 | __drm_atomic_helper_crtc_destroy_state(state); |
d461701c DV |
3033 | kfree(state); |
3034 | } | |
3035 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
3036 | ||
3037 | /** | |
3038 | * drm_atomic_helper_plane_reset - default ->reset hook for planes | |
3039 | * @plane: drm plane | |
3040 | * | |
3041 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
3042 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
3043 | */ | |
3044 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
3045 | { | |
b0b5511b | 3046 | if (plane->state) |
2f701695 | 3047 | __drm_atomic_helper_plane_destroy_state(plane->state); |
321ebf04 | 3048 | |
d461701c DV |
3049 | kfree(plane->state); |
3050 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
07cc0ef6 | 3051 | |
25aaa3a1 | 3052 | if (plane->state) { |
07cc0ef6 | 3053 | plane->state->plane = plane; |
31ad61e4 | 3054 | plane->state->rotation = DRM_ROTATE_0; |
25aaa3a1 | 3055 | } |
d461701c DV |
3056 | } |
3057 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
3058 | ||
f5e7840b TR |
3059 | /** |
3060 | * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state | |
3061 | * @plane: plane object | |
3062 | * @state: atomic plane state | |
3063 | * | |
3064 | * Copies atomic state from a plane's current state. This is useful for | |
3065 | * drivers that subclass the plane state. | |
3066 | */ | |
3067 | void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane, | |
3068 | struct drm_plane_state *state) | |
3069 | { | |
3070 | memcpy(state, plane->state, sizeof(*state)); | |
3071 | ||
3072 | if (state->fb) | |
3073 | drm_framebuffer_reference(state->fb); | |
3074 | } | |
3075 | EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state); | |
3076 | ||
d461701c DV |
3077 | /** |
3078 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
3079 | * @plane: drm plane | |
3080 | * | |
3081 | * Default plane state duplicate hook for drivers which don't have their own | |
3082 | * subclassed plane state structure. | |
3083 | */ | |
3084 | struct drm_plane_state * | |
3085 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
3086 | { | |
321ebf04 DV |
3087 | struct drm_plane_state *state; |
3088 | ||
d461701c DV |
3089 | if (WARN_ON(!plane->state)) |
3090 | return NULL; | |
3091 | ||
f5e7840b TR |
3092 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
3093 | if (state) | |
3094 | __drm_atomic_helper_plane_duplicate_state(plane, state); | |
321ebf04 DV |
3095 | |
3096 | return state; | |
d461701c DV |
3097 | } |
3098 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
3099 | ||
f5e7840b TR |
3100 | /** |
3101 | * __drm_atomic_helper_plane_destroy_state - release plane state | |
f5e7840b TR |
3102 | * @state: plane state object to release |
3103 | * | |
3104 | * Releases all resources stored in the plane state without actually freeing | |
3105 | * the memory of the plane state. This is useful for drivers that subclass the | |
3106 | * plane state. | |
3107 | */ | |
2f701695 | 3108 | void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state) |
f5e7840b TR |
3109 | { |
3110 | if (state->fb) | |
3111 | drm_framebuffer_unreference(state->fb); | |
3112 | } | |
3113 | EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state); | |
3114 | ||
d461701c DV |
3115 | /** |
3116 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
3117 | * @plane: drm plane | |
3118 | * @state: plane state object to release | |
3119 | * | |
3120 | * Default plane state destroy hook for drivers which don't have their own | |
3121 | * subclassed plane state structure. | |
3122 | */ | |
3123 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
321ebf04 | 3124 | struct drm_plane_state *state) |
d461701c | 3125 | { |
2f701695 | 3126 | __drm_atomic_helper_plane_destroy_state(state); |
d461701c DV |
3127 | kfree(state); |
3128 | } | |
3129 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
3130 | ||
4cd39917 ML |
3131 | /** |
3132 | * __drm_atomic_helper_connector_reset - reset state on connector | |
3133 | * @connector: drm connector | |
3134 | * @conn_state: connector state to assign | |
3135 | * | |
3136 | * Initializes the newly allocated @conn_state and assigns it to | |
3137 | * #connector ->state, usually required when initializing the drivers | |
3138 | * or when called from the ->reset hook. | |
3139 | * | |
3140 | * This is useful for drivers that subclass the connector state. | |
3141 | */ | |
3142 | void | |
3143 | __drm_atomic_helper_connector_reset(struct drm_connector *connector, | |
3144 | struct drm_connector_state *conn_state) | |
3145 | { | |
3146 | if (conn_state) | |
3147 | conn_state->connector = connector; | |
3148 | ||
3149 | connector->state = conn_state; | |
3150 | } | |
3151 | EXPORT_SYMBOL(__drm_atomic_helper_connector_reset); | |
3152 | ||
d461701c DV |
3153 | /** |
3154 | * drm_atomic_helper_connector_reset - default ->reset hook for connectors | |
3155 | * @connector: drm connector | |
3156 | * | |
3157 | * Resets the atomic state for @connector by freeing the state pointer (which | |
3158 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
3159 | * object. | |
3160 | */ | |
3161 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
3162 | { | |
4cd39917 ML |
3163 | struct drm_connector_state *conn_state = |
3164 | kzalloc(sizeof(*conn_state), GFP_KERNEL); | |
07cc0ef6 | 3165 | |
b0b5511b | 3166 | if (connector->state) |
fabd9106 | 3167 | __drm_atomic_helper_connector_destroy_state(connector->state); |
b0b5511b | 3168 | |
4cd39917 ML |
3169 | kfree(connector->state); |
3170 | __drm_atomic_helper_connector_reset(connector, conn_state); | |
d461701c DV |
3171 | } |
3172 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
3173 | ||
f5e7840b TR |
3174 | /** |
3175 | * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state | |
3176 | * @connector: connector object | |
3177 | * @state: atomic connector state | |
3178 | * | |
3179 | * Copies atomic state from a connector's current state. This is useful for | |
3180 | * drivers that subclass the connector state. | |
3181 | */ | |
3182 | void | |
3183 | __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector, | |
3184 | struct drm_connector_state *state) | |
3185 | { | |
3186 | memcpy(state, connector->state, sizeof(*state)); | |
d2307dea DA |
3187 | if (state->crtc) |
3188 | drm_connector_reference(connector); | |
f5e7840b TR |
3189 | } |
3190 | EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state); | |
3191 | ||
d461701c DV |
3192 | /** |
3193 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
3194 | * @connector: drm connector | |
3195 | * | |
3196 | * Default connector state duplicate hook for drivers which don't have their own | |
3197 | * subclassed connector state structure. | |
3198 | */ | |
3199 | struct drm_connector_state * | |
3200 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
3201 | { | |
f5e7840b TR |
3202 | struct drm_connector_state *state; |
3203 | ||
d461701c DV |
3204 | if (WARN_ON(!connector->state)) |
3205 | return NULL; | |
3206 | ||
f5e7840b TR |
3207 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
3208 | if (state) | |
3209 | __drm_atomic_helper_connector_duplicate_state(connector, state); | |
3210 | ||
3211 | return state; | |
d461701c DV |
3212 | } |
3213 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
3214 | ||
397fd77c TR |
3215 | /** |
3216 | * drm_atomic_helper_duplicate_state - duplicate an atomic state object | |
3217 | * @dev: DRM device | |
3218 | * @ctx: lock acquisition context | |
3219 | * | |
3220 | * Makes a copy of the current atomic state by looping over all objects and | |
14942760 TR |
3221 | * duplicating their respective states. This is used for example by suspend/ |
3222 | * resume support code to save the state prior to suspend such that it can | |
3223 | * be restored upon resume. | |
397fd77c TR |
3224 | * |
3225 | * Note that this treats atomic state as persistent between save and restore. | |
3226 | * Drivers must make sure that this is possible and won't result in confusion | |
3227 | * or erroneous behaviour. | |
3228 | * | |
3229 | * Note that if callers haven't already acquired all modeset locks this might | |
3230 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
3231 | * | |
3232 | * Returns: | |
3233 | * A pointer to the copy of the atomic state object on success or an | |
3234 | * ERR_PTR()-encoded error code on failure. | |
14942760 TR |
3235 | * |
3236 | * See also: | |
3237 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
397fd77c TR |
3238 | */ |
3239 | struct drm_atomic_state * | |
3240 | drm_atomic_helper_duplicate_state(struct drm_device *dev, | |
3241 | struct drm_modeset_acquire_ctx *ctx) | |
3242 | { | |
3243 | struct drm_atomic_state *state; | |
3244 | struct drm_connector *conn; | |
3245 | struct drm_plane *plane; | |
3246 | struct drm_crtc *crtc; | |
3247 | int err = 0; | |
3248 | ||
3249 | state = drm_atomic_state_alloc(dev); | |
3250 | if (!state) | |
3251 | return ERR_PTR(-ENOMEM); | |
3252 | ||
3253 | state->acquire_ctx = ctx; | |
3254 | ||
3255 | drm_for_each_crtc(crtc, dev) { | |
3256 | struct drm_crtc_state *crtc_state; | |
3257 | ||
3258 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3259 | if (IS_ERR(crtc_state)) { | |
3260 | err = PTR_ERR(crtc_state); | |
3261 | goto free; | |
3262 | } | |
3263 | } | |
3264 | ||
3265 | drm_for_each_plane(plane, dev) { | |
3266 | struct drm_plane_state *plane_state; | |
3267 | ||
3268 | plane_state = drm_atomic_get_plane_state(state, plane); | |
3269 | if (IS_ERR(plane_state)) { | |
3270 | err = PTR_ERR(plane_state); | |
3271 | goto free; | |
3272 | } | |
3273 | } | |
3274 | ||
3275 | drm_for_each_connector(conn, dev) { | |
3276 | struct drm_connector_state *conn_state; | |
3277 | ||
3278 | conn_state = drm_atomic_get_connector_state(state, conn); | |
3279 | if (IS_ERR(conn_state)) { | |
3280 | err = PTR_ERR(conn_state); | |
3281 | goto free; | |
3282 | } | |
3283 | } | |
3284 | ||
3285 | /* clear the acquire context so that it isn't accidentally reused */ | |
3286 | state->acquire_ctx = NULL; | |
3287 | ||
3288 | free: | |
3289 | if (err < 0) { | |
3290 | drm_atomic_state_free(state); | |
3291 | state = ERR_PTR(err); | |
3292 | } | |
3293 | ||
3294 | return state; | |
3295 | } | |
3296 | EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); | |
3297 | ||
f5e7840b TR |
3298 | /** |
3299 | * __drm_atomic_helper_connector_destroy_state - release connector state | |
f5e7840b TR |
3300 | * @state: connector state object to release |
3301 | * | |
3302 | * Releases all resources stored in the connector state without actually | |
3303 | * freeing the memory of the connector state. This is useful for drivers that | |
3304 | * subclass the connector state. | |
3305 | */ | |
3306 | void | |
fabd9106 | 3307 | __drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state) |
f5e7840b TR |
3308 | { |
3309 | /* | |
3310 | * This is currently a placeholder so that drivers that subclass the | |
3311 | * state will automatically do the right thing if code is ever added | |
3312 | * to this function. | |
3313 | */ | |
d2307dea DA |
3314 | if (state->crtc) |
3315 | drm_connector_unreference(state->connector); | |
f5e7840b TR |
3316 | } |
3317 | EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state); | |
3318 | ||
d461701c DV |
3319 | /** |
3320 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
3321 | * @connector: drm connector | |
3322 | * @state: connector state object to release | |
3323 | * | |
3324 | * Default connector state destroy hook for drivers which don't have their own | |
3325 | * subclassed connector state structure. | |
3326 | */ | |
3327 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
3328 | struct drm_connector_state *state) | |
3329 | { | |
fabd9106 | 3330 | __drm_atomic_helper_connector_destroy_state(state); |
d461701c DV |
3331 | kfree(state); |
3332 | } | |
3333 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); | |
5488dc16 LL |
3334 | |
3335 | /** | |
3336 | * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table | |
3337 | * @crtc: CRTC object | |
3338 | * @red: red correction table | |
3339 | * @green: green correction table | |
3340 | * @blue: green correction table | |
5488dc16 LL |
3341 | * @size: size of the tables |
3342 | * | |
3343 | * Implements support for legacy gamma correction table for drivers | |
3344 | * that support color management through the DEGAMMA_LUT/GAMMA_LUT | |
3345 | * properties. | |
3346 | */ | |
7ea77283 ML |
3347 | int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc, |
3348 | u16 *red, u16 *green, u16 *blue, | |
3349 | uint32_t size) | |
5488dc16 LL |
3350 | { |
3351 | struct drm_device *dev = crtc->dev; | |
3352 | struct drm_mode_config *config = &dev->mode_config; | |
3353 | struct drm_atomic_state *state; | |
3354 | struct drm_crtc_state *crtc_state; | |
3355 | struct drm_property_blob *blob = NULL; | |
3356 | struct drm_color_lut *blob_data; | |
3357 | int i, ret = 0; | |
3358 | ||
3359 | state = drm_atomic_state_alloc(crtc->dev); | |
3360 | if (!state) | |
7ea77283 | 3361 | return -ENOMEM; |
5488dc16 LL |
3362 | |
3363 | blob = drm_property_create_blob(dev, | |
3364 | sizeof(struct drm_color_lut) * size, | |
3365 | NULL); | |
562c5b4d LL |
3366 | if (IS_ERR(blob)) { |
3367 | ret = PTR_ERR(blob); | |
c1f415c9 | 3368 | blob = NULL; |
5488dc16 LL |
3369 | goto fail; |
3370 | } | |
3371 | ||
3372 | /* Prepare GAMMA_LUT with the legacy values. */ | |
3373 | blob_data = (struct drm_color_lut *) blob->data; | |
3374 | for (i = 0; i < size; i++) { | |
3375 | blob_data[i].red = red[i]; | |
3376 | blob_data[i].green = green[i]; | |
3377 | blob_data[i].blue = blue[i]; | |
3378 | } | |
3379 | ||
3380 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
3381 | retry: | |
3382 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3383 | if (IS_ERR(crtc_state)) { | |
3384 | ret = PTR_ERR(crtc_state); | |
3385 | goto fail; | |
3386 | } | |
3387 | ||
3388 | /* Reset DEGAMMA_LUT and CTM properties. */ | |
3389 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3390 | config->degamma_lut_property, 0); | |
3391 | if (ret) | |
3392 | goto fail; | |
3393 | ||
3394 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3395 | config->ctm_property, 0); | |
3396 | if (ret) | |
3397 | goto fail; | |
3398 | ||
3399 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3400 | config->gamma_lut_property, blob->base.id); | |
3401 | if (ret) | |
3402 | goto fail; | |
3403 | ||
3404 | ret = drm_atomic_commit(state); | |
3405 | if (ret) | |
3406 | goto fail; | |
3407 | ||
3408 | /* Driver takes ownership of state on successful commit. */ | |
3409 | ||
3410 | drm_property_unreference_blob(blob); | |
3411 | ||
7ea77283 | 3412 | return 0; |
5488dc16 LL |
3413 | fail: |
3414 | if (ret == -EDEADLK) | |
3415 | goto backoff; | |
3416 | ||
3417 | drm_atomic_state_free(state); | |
3418 | drm_property_unreference_blob(blob); | |
3419 | ||
7ea77283 | 3420 | return ret; |
5488dc16 LL |
3421 | backoff: |
3422 | drm_atomic_state_clear(state); | |
3423 | drm_atomic_legacy_backoff(state); | |
3424 | ||
3425 | goto retry; | |
3426 | } | |
3427 | EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set); |