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c2fcd274 DV |
1 | /* |
2 | * Copyright (C) 2014 Red Hat | |
3 | * Copyright (C) 2014 Intel Corp. | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a | |
6 | * copy of this software and associated documentation files (the "Software"), | |
7 | * to deal in the Software without restriction, including without limitation | |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | * and/or sell copies of the Software, and to permit persons to whom the | |
10 | * Software is furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
21 | * OTHER DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Rob Clark <robdclark@gmail.com> | |
25 | * Daniel Vetter <daniel.vetter@ffwll.ch> | |
26 | */ | |
27 | ||
28 | #include <drm/drmP.h> | |
29 | #include <drm/drm_atomic.h> | |
30 | #include <drm/drm_plane_helper.h> | |
31 | #include <drm/drm_crtc_helper.h> | |
623369e5 | 32 | #include <drm/drm_atomic_helper.h> |
f54d1867 | 33 | #include <linux/dma-fence.h> |
c2fcd274 | 34 | |
44d1240d MS |
35 | #include "drm_crtc_internal.h" |
36 | ||
3150c7d0 DV |
37 | /** |
38 | * DOC: overview | |
39 | * | |
40 | * This helper library provides implementations of check and commit functions on | |
41 | * top of the CRTC modeset helper callbacks and the plane helper callbacks. It | |
42 | * also provides convenience implementations for the atomic state handling | |
43 | * callbacks for drivers which don't need to subclass the drm core structures to | |
44 | * add their own additional internal state. | |
45 | * | |
46 | * This library also provides default implementations for the check callback in | |
26196f7e DV |
47 | * drm_atomic_helper_check() and for the commit callback with |
48 | * drm_atomic_helper_commit(). But the individual stages and callbacks are | |
49 | * exposed to allow drivers to mix and match and e.g. use the plane helpers only | |
3150c7d0 DV |
50 | * together with a driver private modeset implementation. |
51 | * | |
52 | * This library also provides implementations for all the legacy driver | |
26196f7e DV |
53 | * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(), |
54 | * drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the | |
3150c7d0 DV |
55 | * various functions to implement set_property callbacks. New drivers must not |
56 | * implement these functions themselves but must use the provided helpers. | |
092d01da DV |
57 | * |
58 | * The atomic helper uses the same function table structures as all other | |
ea0dd85a DV |
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 | |
092d01da | 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 | 96 | struct drm_connector *connector; |
c36a3254 | 97 | struct drm_connector_list_iter conn_iter; |
40616a26 ML |
98 | struct drm_encoder *encoder; |
99 | unsigned encoder_mask = 0; | |
c36a3254 | 100 | int i, ret = 0; |
97ac3204 | 101 | |
8248b65d ML |
102 | /* |
103 | * First loop, find all newly assigned encoders from the connectors | |
104 | * part of the state. If the same encoder is assigned to multiple | |
105 | * connectors bail out. | |
106 | */ | |
97ac3204 | 107 | for_each_connector_in_state(state, connector, conn_state, i) { |
40616a26 ML |
108 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; |
109 | struct drm_encoder *new_encoder; | |
110 | ||
111 | if (!conn_state->crtc) | |
97ac3204 DV |
112 | continue; |
113 | ||
40616a26 ML |
114 | if (funcs->atomic_best_encoder) |
115 | new_encoder = funcs->atomic_best_encoder(connector, conn_state); | |
a0909cc5 | 116 | else if (funcs->best_encoder) |
40616a26 | 117 | new_encoder = funcs->best_encoder(connector); |
a0909cc5 BB |
118 | else |
119 | new_encoder = drm_atomic_helper_best_encoder(connector); | |
40616a26 | 120 | |
8248b65d ML |
121 | if (new_encoder) { |
122 | if (encoder_mask & (1 << drm_encoder_index(new_encoder))) { | |
123 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n", | |
124 | new_encoder->base.id, new_encoder->name, | |
125 | connector->base.id, connector->name); | |
126 | ||
127 | return -EINVAL; | |
128 | } | |
129 | ||
40616a26 | 130 | encoder_mask |= 1 << drm_encoder_index(new_encoder); |
8248b65d | 131 | } |
97ac3204 DV |
132 | } |
133 | ||
8248b65d ML |
134 | if (!encoder_mask) |
135 | return 0; | |
97ac3204 | 136 | |
8248b65d ML |
137 | /* |
138 | * Second loop, iterate over all connectors not part of the state. | |
139 | * | |
140 | * If a conflicting encoder is found and disable_conflicting_encoders | |
141 | * is not set, an error is returned. Userspace can provide a solution | |
142 | * through the atomic ioctl. | |
143 | * | |
144 | * If the flag is set conflicting connectors are removed from the crtc | |
145 | * and the crtc is disabled if no encoder is left. This preserves | |
146 | * compatibility with the legacy set_config behavior. | |
147 | */ | |
c36a3254 DV |
148 | drm_connector_list_iter_get(state->dev, &conn_iter); |
149 | drm_for_each_connector_iter(connector, &conn_iter) { | |
40616a26 | 150 | struct drm_crtc_state *crtc_state; |
623369e5 | 151 | |
40616a26 ML |
152 | if (drm_atomic_get_existing_connector_state(state, connector)) |
153 | continue; | |
623369e5 | 154 | |
40616a26 ML |
155 | encoder = connector->state->best_encoder; |
156 | if (!encoder || !(encoder_mask & (1 << drm_encoder_index(encoder)))) | |
623369e5 DV |
157 | continue; |
158 | ||
8248b65d ML |
159 | if (!disable_conflicting_encoders) { |
160 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n", | |
161 | encoder->base.id, encoder->name, | |
162 | connector->state->crtc->base.id, | |
163 | connector->state->crtc->name, | |
164 | connector->base.id, connector->name); | |
c36a3254 DV |
165 | ret = -EINVAL; |
166 | goto out; | |
8248b65d ML |
167 | } |
168 | ||
40616a26 | 169 | conn_state = drm_atomic_get_connector_state(state, connector); |
c36a3254 DV |
170 | if (IS_ERR(conn_state)) { |
171 | ret = PTR_ERR(conn_state); | |
172 | goto out; | |
173 | } | |
40616a26 ML |
174 | |
175 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n", | |
176 | encoder->base.id, encoder->name, | |
177 | conn_state->crtc->base.id, conn_state->crtc->name, | |
178 | connector->base.id, connector->name); | |
179 | ||
180 | crtc_state = drm_atomic_get_existing_crtc_state(state, conn_state->crtc); | |
181 | ||
182 | ret = drm_atomic_set_crtc_for_connector(conn_state, NULL); | |
183 | if (ret) | |
c36a3254 | 184 | goto out; |
40616a26 ML |
185 | |
186 | if (!crtc_state->connector_mask) { | |
187 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, | |
188 | NULL); | |
189 | if (ret < 0) | |
c36a3254 | 190 | goto out; |
40616a26 ML |
191 | |
192 | crtc_state->active = false; | |
193 | } | |
623369e5 | 194 | } |
c36a3254 DV |
195 | out: |
196 | drm_connector_list_iter_put(&conn_iter); | |
623369e5 | 197 | |
c36a3254 | 198 | return ret; |
623369e5 DV |
199 | } |
200 | ||
e87a52b3 ML |
201 | static void |
202 | set_best_encoder(struct drm_atomic_state *state, | |
203 | struct drm_connector_state *conn_state, | |
204 | struct drm_encoder *encoder) | |
205 | { | |
206 | struct drm_crtc_state *crtc_state; | |
207 | struct drm_crtc *crtc; | |
208 | ||
209 | if (conn_state->best_encoder) { | |
210 | /* Unset the encoder_mask in the old crtc state. */ | |
211 | crtc = conn_state->connector->state->crtc; | |
212 | ||
213 | /* A NULL crtc is an error here because we should have | |
214 | * duplicated a NULL best_encoder when crtc was NULL. | |
215 | * As an exception restoring duplicated atomic state | |
216 | * during resume is allowed, so don't warn when | |
217 | * best_encoder is equal to encoder we intend to set. | |
218 | */ | |
219 | WARN_ON(!crtc && encoder != conn_state->best_encoder); | |
220 | if (crtc) { | |
221 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); | |
222 | ||
223 | crtc_state->encoder_mask &= | |
224 | ~(1 << drm_encoder_index(conn_state->best_encoder)); | |
225 | } | |
226 | } | |
227 | ||
228 | if (encoder) { | |
229 | crtc = conn_state->crtc; | |
230 | WARN_ON(!crtc); | |
231 | if (crtc) { | |
232 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); | |
233 | ||
234 | crtc_state->encoder_mask |= | |
235 | 1 << drm_encoder_index(encoder); | |
236 | } | |
237 | } | |
238 | ||
239 | conn_state->best_encoder = encoder; | |
240 | } | |
241 | ||
ec5aaa58 | 242 | static void |
623369e5 | 243 | steal_encoder(struct drm_atomic_state *state, |
ff19b786 | 244 | struct drm_encoder *encoder) |
623369e5 | 245 | { |
623369e5 DV |
246 | struct drm_crtc_state *crtc_state; |
247 | struct drm_connector *connector; | |
248 | struct drm_connector_state *connector_state; | |
ec5aaa58 | 249 | int i; |
623369e5 | 250 | |
ec5aaa58 | 251 | for_each_connector_in_state(state, connector, connector_state, i) { |
ff19b786 | 252 | struct drm_crtc *encoder_crtc; |
623369e5 | 253 | |
e87a52b3 | 254 | if (connector_state->best_encoder != encoder) |
623369e5 DV |
255 | continue; |
256 | ||
ff19b786 | 257 | encoder_crtc = connector->state->crtc; |
623369e5 | 258 | |
ff19b786 ML |
259 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n", |
260 | encoder->base.id, encoder->name, | |
261 | encoder_crtc->base.id, encoder_crtc->name); | |
e87a52b3 ML |
262 | |
263 | set_best_encoder(state, connector_state, NULL); | |
623369e5 | 264 | |
ff19b786 ML |
265 | crtc_state = drm_atomic_get_existing_crtc_state(state, encoder_crtc); |
266 | crtc_state->connectors_changed = true; | |
267 | ||
ec5aaa58 | 268 | return; |
623369e5 | 269 | } |
623369e5 DV |
270 | } |
271 | ||
272 | static int | |
9459545b ML |
273 | update_connector_routing(struct drm_atomic_state *state, |
274 | struct drm_connector *connector, | |
275 | struct drm_connector_state *connector_state) | |
623369e5 | 276 | { |
b5ceff20 | 277 | const struct drm_connector_helper_funcs *funcs; |
623369e5 | 278 | struct drm_encoder *new_encoder; |
623369e5 | 279 | struct drm_crtc_state *crtc_state; |
623369e5 | 280 | |
17a38d9c DV |
281 | DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n", |
282 | connector->base.id, | |
283 | connector->name); | |
623369e5 DV |
284 | |
285 | if (connector->state->crtc != connector_state->crtc) { | |
286 | if (connector->state->crtc) { | |
9b8d1e53 | 287 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector->state->crtc); |
fc596660 | 288 | crtc_state->connectors_changed = true; |
623369e5 DV |
289 | } |
290 | ||
291 | if (connector_state->crtc) { | |
9b8d1e53 | 292 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc); |
fc596660 | 293 | crtc_state->connectors_changed = true; |
623369e5 DV |
294 | } |
295 | } | |
296 | ||
297 | if (!connector_state->crtc) { | |
17a38d9c | 298 | DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n", |
623369e5 DV |
299 | connector->base.id, |
300 | connector->name); | |
301 | ||
e87a52b3 | 302 | set_best_encoder(state, connector_state, NULL); |
623369e5 DV |
303 | |
304 | return 0; | |
305 | } | |
306 | ||
307 | funcs = connector->helper_private; | |
3b8a684b DV |
308 | |
309 | if (funcs->atomic_best_encoder) | |
310 | new_encoder = funcs->atomic_best_encoder(connector, | |
311 | connector_state); | |
c61b93fe | 312 | else if (funcs->best_encoder) |
3b8a684b | 313 | new_encoder = funcs->best_encoder(connector); |
c61b93fe BB |
314 | else |
315 | new_encoder = drm_atomic_helper_best_encoder(connector); | |
623369e5 DV |
316 | |
317 | if (!new_encoder) { | |
17a38d9c DV |
318 | DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", |
319 | connector->base.id, | |
320 | connector->name); | |
623369e5 DV |
321 | return -EINVAL; |
322 | } | |
323 | ||
5481c8fb DV |
324 | if (!drm_encoder_crtc_ok(new_encoder, connector_state->crtc)) { |
325 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d]\n", | |
326 | new_encoder->base.id, | |
327 | new_encoder->name, | |
328 | connector_state->crtc->base.id); | |
329 | return -EINVAL; | |
330 | } | |
331 | ||
623369e5 | 332 | if (new_encoder == connector_state->best_encoder) { |
e87a52b3 ML |
333 | set_best_encoder(state, connector_state, new_encoder); |
334 | ||
fa3ab4c2 | 335 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n", |
17a38d9c DV |
336 | connector->base.id, |
337 | connector->name, | |
338 | new_encoder->base.id, | |
339 | new_encoder->name, | |
fa3ab4c2 VS |
340 | connector_state->crtc->base.id, |
341 | connector_state->crtc->name); | |
623369e5 DV |
342 | |
343 | return 0; | |
344 | } | |
345 | ||
ec5aaa58 | 346 | steal_encoder(state, new_encoder); |
6ea76f3c | 347 | |
e87a52b3 ML |
348 | set_best_encoder(state, connector_state, new_encoder); |
349 | ||
9b8d1e53 | 350 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc); |
fc596660 | 351 | crtc_state->connectors_changed = true; |
623369e5 | 352 | |
fa3ab4c2 | 353 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n", |
17a38d9c DV |
354 | connector->base.id, |
355 | connector->name, | |
356 | new_encoder->base.id, | |
357 | new_encoder->name, | |
fa3ab4c2 VS |
358 | connector_state->crtc->base.id, |
359 | connector_state->crtc->name); | |
623369e5 DV |
360 | |
361 | return 0; | |
362 | } | |
363 | ||
364 | static int | |
365 | mode_fixup(struct drm_atomic_state *state) | |
366 | { | |
df63b999 | 367 | struct drm_crtc *crtc; |
623369e5 | 368 | struct drm_crtc_state *crtc_state; |
df63b999 | 369 | struct drm_connector *connector; |
623369e5 DV |
370 | struct drm_connector_state *conn_state; |
371 | int i; | |
372 | bool ret; | |
373 | ||
df63b999 | 374 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
fc596660 ML |
375 | if (!crtc_state->mode_changed && |
376 | !crtc_state->connectors_changed) | |
623369e5 DV |
377 | continue; |
378 | ||
379 | drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); | |
380 | } | |
381 | ||
df63b999 | 382 | for_each_connector_in_state(state, connector, conn_state, i) { |
b5ceff20 | 383 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
384 | struct drm_encoder *encoder; |
385 | ||
623369e5 DV |
386 | WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); |
387 | ||
388 | if (!conn_state->crtc || !conn_state->best_encoder) | |
389 | continue; | |
390 | ||
2943ef32 AH |
391 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
392 | conn_state->crtc); | |
623369e5 DV |
393 | |
394 | /* | |
395 | * Each encoder has at most one connector (since we always steal | |
396 | * it away), so we won't call ->mode_fixup twice. | |
397 | */ | |
398 | encoder = conn_state->best_encoder; | |
399 | funcs = encoder->helper_private; | |
400 | ||
862e686c AT |
401 | ret = drm_bridge_mode_fixup(encoder->bridge, &crtc_state->mode, |
402 | &crtc_state->adjusted_mode); | |
403 | if (!ret) { | |
404 | DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); | |
405 | return -EINVAL; | |
623369e5 DV |
406 | } |
407 | ||
2827635e | 408 | if (funcs && funcs->atomic_check) { |
4cd4df80 TR |
409 | ret = funcs->atomic_check(encoder, crtc_state, |
410 | conn_state); | |
411 | if (ret) { | |
17a38d9c DV |
412 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", |
413 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
414 | return ret; |
415 | } | |
2827635e | 416 | } else if (funcs && funcs->mode_fixup) { |
4cd4df80 TR |
417 | ret = funcs->mode_fixup(encoder, &crtc_state->mode, |
418 | &crtc_state->adjusted_mode); | |
419 | if (!ret) { | |
17a38d9c DV |
420 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", |
421 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
422 | return -EINVAL; |
423 | } | |
623369e5 DV |
424 | } |
425 | } | |
426 | ||
df63b999 | 427 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 428 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 429 | |
f55f1701 LY |
430 | if (!crtc_state->enable) |
431 | continue; | |
432 | ||
fc596660 ML |
433 | if (!crtc_state->mode_changed && |
434 | !crtc_state->connectors_changed) | |
623369e5 DV |
435 | continue; |
436 | ||
437 | funcs = crtc->helper_private; | |
840bfe95 ACO |
438 | if (!funcs->mode_fixup) |
439 | continue; | |
440 | ||
623369e5 DV |
441 | ret = funcs->mode_fixup(crtc, &crtc_state->mode, |
442 | &crtc_state->adjusted_mode); | |
443 | if (!ret) { | |
fa3ab4c2 VS |
444 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n", |
445 | crtc->base.id, crtc->name); | |
623369e5 DV |
446 | return -EINVAL; |
447 | } | |
448 | } | |
449 | ||
450 | return 0; | |
451 | } | |
452 | ||
d9b13620 | 453 | /** |
f98bd3ef | 454 | * drm_atomic_helper_check_modeset - validate state object for modeset changes |
d9b13620 DV |
455 | * @dev: DRM device |
456 | * @state: the driver state object | |
457 | * | |
458 | * Check the state object to see if the requested state is physically possible. | |
459 | * This does all the crtc and connector related computations for an atomic | |
fc596660 | 460 | * update and adds any additional connectors needed for full modesets and calls |
6806cdf9 DV |
461 | * down into &drm_crtc_helper_funcs.mode_fixup and |
462 | * &drm_encoder_helper_funcs.mode_fixup or | |
463 | * &drm_encoder_helper_funcs.atomic_check functions of the driver backend. | |
464 | * | |
465 | * &drm_crtc_state.mode_changed is set when the input mode is changed. | |
466 | * &drm_crtc_state.connectors_changed is set when a connector is added or | |
467 | * removed from the crtc. &drm_crtc_state.active_changed is set when | |
468 | * &drm_crtc_state.active changes, which is used for DPMS. | |
d807ed1c | 469 | * See also: drm_atomic_crtc_needs_modeset() |
d9b13620 DV |
470 | * |
471 | * IMPORTANT: | |
472 | * | |
6806cdf9 DV |
473 | * Drivers which set &drm_crtc_state.mode_changed (e.g. in their |
474 | * &drm_plane_helper_funcs.atomic_check hooks if a plane update can't be done | |
475 | * without a full modeset) _must_ call this function afterwards after that | |
476 | * change. It is permitted to call this function multiple times for the same | |
477 | * update, e.g. when the &drm_crtc_helper_funcs.atomic_check functions depend | |
478 | * upon the adjusted dotclock for fifo space allocation and watermark | |
479 | * computation. | |
d9b13620 | 480 | * |
c39032a8 | 481 | * RETURNS: |
d9b13620 DV |
482 | * Zero for success or -errno |
483 | */ | |
484 | int | |
934ce1c2 | 485 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
486 | struct drm_atomic_state *state) |
487 | { | |
623369e5 DV |
488 | struct drm_crtc *crtc; |
489 | struct drm_crtc_state *crtc_state; | |
df63b999 ACO |
490 | struct drm_connector *connector; |
491 | struct drm_connector_state *connector_state; | |
623369e5 DV |
492 | int i, ret; |
493 | ||
df63b999 | 494 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 | 495 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { |
fa3ab4c2 VS |
496 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n", |
497 | crtc->base.id, crtc->name); | |
623369e5 DV |
498 | crtc_state->mode_changed = true; |
499 | } | |
500 | ||
501 | if (crtc->state->enable != crtc_state->enable) { | |
fa3ab4c2 VS |
502 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n", |
503 | crtc->base.id, crtc->name); | |
fc596660 ML |
504 | |
505 | /* | |
506 | * For clarity this assignment is done here, but | |
507 | * enable == 0 is only true when there are no | |
508 | * connectors and a NULL mode. | |
509 | * | |
510 | * The other way around is true as well. enable != 0 | |
511 | * iff connectors are attached and a mode is set. | |
512 | */ | |
623369e5 | 513 | crtc_state->mode_changed = true; |
fc596660 | 514 | crtc_state->connectors_changed = true; |
623369e5 DV |
515 | } |
516 | } | |
517 | ||
8248b65d ML |
518 | ret = handle_conflicting_encoders(state, state->legacy_set_config); |
519 | if (ret) | |
520 | return ret; | |
40616a26 | 521 | |
df63b999 | 522 | for_each_connector_in_state(state, connector, connector_state, i) { |
623369e5 | 523 | /* |
d807ed1c BS |
524 | * This only sets crtc->connectors_changed for routing changes, |
525 | * drivers must set crtc->connectors_changed themselves when | |
526 | * connector properties need to be updated. | |
623369e5 | 527 | */ |
9459545b ML |
528 | ret = update_connector_routing(state, connector, |
529 | connector_state); | |
623369e5 DV |
530 | if (ret) |
531 | return ret; | |
532 | } | |
533 | ||
534 | /* | |
535 | * After all the routing has been prepared we need to add in any | |
536 | * connector which is itself unchanged, but who's crtc changes it's | |
537 | * configuration. This must be done before calling mode_fixup in case a | |
538 | * crtc only changed its mode but has the same set of connectors. | |
539 | */ | |
df63b999 | 540 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
14de6c44 ML |
541 | bool has_connectors = |
542 | !!crtc_state->connector_mask; | |
623369e5 | 543 | |
eab3bbef DV |
544 | /* |
545 | * We must set ->active_changed after walking connectors for | |
546 | * otherwise an update that only changes active would result in | |
547 | * a full modeset because update_connector_routing force that. | |
548 | */ | |
549 | if (crtc->state->active != crtc_state->active) { | |
fa3ab4c2 VS |
550 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", |
551 | crtc->base.id, crtc->name); | |
eab3bbef DV |
552 | crtc_state->active_changed = true; |
553 | } | |
554 | ||
2465ff62 | 555 | if (!drm_atomic_crtc_needs_modeset(crtc_state)) |
623369e5 DV |
556 | continue; |
557 | ||
fa3ab4c2 VS |
558 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n", |
559 | crtc->base.id, crtc->name, | |
17a38d9c | 560 | crtc_state->enable ? 'y' : 'n', |
fa3ab4c2 | 561 | crtc_state->active ? 'y' : 'n'); |
623369e5 DV |
562 | |
563 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
564 | if (ret != 0) | |
565 | return ret; | |
566 | ||
57744aa7 ML |
567 | ret = drm_atomic_add_affected_planes(state, crtc); |
568 | if (ret != 0) | |
569 | return ret; | |
570 | ||
14de6c44 | 571 | if (crtc_state->enable != has_connectors) { |
fa3ab4c2 VS |
572 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", |
573 | crtc->base.id, crtc->name); | |
623369e5 DV |
574 | |
575 | return -EINVAL; | |
576 | } | |
577 | } | |
578 | ||
579 | return mode_fixup(state); | |
580 | } | |
d9b13620 | 581 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 582 | |
c2fcd274 | 583 | /** |
f98bd3ef | 584 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
585 | * @dev: DRM device |
586 | * @state: the driver state object | |
587 | * | |
588 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 | 589 | * This does all the plane update related checks using by calling into the |
6806cdf9 DV |
590 | * &drm_crtc_helper_funcs.atomic_check and &drm_plane_helper_funcs.atomic_check |
591 | * hooks provided by the driver. | |
c2fcd274 | 592 | * |
6806cdf9 | 593 | * It also sets &drm_crtc_state.planes_changed to indicate that a crtc has |
fc596660 ML |
594 | * updated planes. |
595 | * | |
c39032a8 | 596 | * RETURNS: |
c2fcd274 DV |
597 | * Zero for success or -errno |
598 | */ | |
d9b13620 DV |
599 | int |
600 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
601 | struct drm_atomic_state *state) | |
c2fcd274 | 602 | { |
df63b999 ACO |
603 | struct drm_crtc *crtc; |
604 | struct drm_crtc_state *crtc_state; | |
605 | struct drm_plane *plane; | |
606 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
607 | int i, ret = 0; |
608 | ||
df63b999 | 609 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 610 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
611 | |
612 | funcs = plane->helper_private; | |
613 | ||
614 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
615 | ||
616 | if (!funcs || !funcs->atomic_check) | |
617 | continue; | |
618 | ||
619 | ret = funcs->atomic_check(plane, plane_state); | |
620 | if (ret) { | |
9f4c97a2 VS |
621 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n", |
622 | plane->base.id, plane->name); | |
c2fcd274 DV |
623 | return ret; |
624 | } | |
625 | } | |
626 | ||
df63b999 | 627 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 628 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
629 | |
630 | funcs = crtc->helper_private; | |
631 | ||
632 | if (!funcs || !funcs->atomic_check) | |
633 | continue; | |
634 | ||
be9174a4 | 635 | ret = funcs->atomic_check(crtc, crtc_state); |
c2fcd274 | 636 | if (ret) { |
fa3ab4c2 VS |
637 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n", |
638 | crtc->base.id, crtc->name); | |
c2fcd274 DV |
639 | return ret; |
640 | } | |
641 | } | |
642 | ||
d9b13620 DV |
643 | return ret; |
644 | } | |
645 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
646 | ||
647 | /** | |
648 | * drm_atomic_helper_check - validate state object | |
649 | * @dev: DRM device | |
650 | * @state: the driver state object | |
651 | * | |
652 | * Check the state object to see if the requested state is physically possible. | |
653 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
654 | * checking that a driver needs it can simply wrap that around this function. | |
6806cdf9 DV |
655 | * Drivers without such needs can directly use this as their |
656 | * &drm_mode_config_funcs.atomic_check callback. | |
d9b13620 | 657 | * |
b4274fbe DV |
658 | * This just wraps the two parts of the state checking for planes and modeset |
659 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
660 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
6806cdf9 DV |
661 | * @drm_plane_helper_funcs.atomic_check and @drm_crtc_helper_funcs.atomic_check |
662 | * functions depend upon an updated adjusted_mode.clock to e.g. properly compute | |
663 | * watermarks. | |
b4274fbe | 664 | * |
c39032a8 | 665 | * RETURNS: |
d9b13620 DV |
666 | * Zero for success or -errno |
667 | */ | |
668 | int drm_atomic_helper_check(struct drm_device *dev, | |
669 | struct drm_atomic_state *state) | |
670 | { | |
671 | int ret; | |
672 | ||
b4274fbe | 673 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
674 | if (ret) |
675 | return ret; | |
676 | ||
b4274fbe | 677 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
678 | if (ret) |
679 | return ret; | |
680 | ||
c2fcd274 DV |
681 | return ret; |
682 | } | |
683 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
684 | ||
623369e5 DV |
685 | static void |
686 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
687 | { | |
df63b999 ACO |
688 | struct drm_connector *connector; |
689 | struct drm_connector_state *old_conn_state; | |
690 | struct drm_crtc *crtc; | |
691 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
692 | int i; |
693 | ||
df63b999 | 694 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 695 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
696 | struct drm_encoder *encoder; |
697 | ||
623369e5 DV |
698 | /* Shut down everything that's in the changeset and currently |
699 | * still on. So need to check the old, saved state. */ | |
df63b999 | 700 | if (!old_conn_state->crtc) |
623369e5 DV |
701 | continue; |
702 | ||
2943ef32 AH |
703 | old_crtc_state = drm_atomic_get_existing_crtc_state(old_state, |
704 | old_conn_state->crtc); | |
eab3bbef | 705 | |
4218a32f | 706 | if (!old_crtc_state->active || |
2465ff62 | 707 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) |
eab3bbef DV |
708 | continue; |
709 | ||
46df9adb | 710 | encoder = old_conn_state->best_encoder; |
623369e5 | 711 | |
46df9adb RC |
712 | /* We shouldn't get this far if we didn't previously have |
713 | * an encoder.. but WARN_ON() rather than explode. | |
714 | */ | |
715 | if (WARN_ON(!encoder)) | |
623369e5 DV |
716 | continue; |
717 | ||
718 | funcs = encoder->helper_private; | |
719 | ||
17a38d9c DV |
720 | DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
721 | encoder->base.id, encoder->name); | |
95d6eb3b | 722 | |
623369e5 DV |
723 | /* |
724 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 725 | * it away), so we won't call disable hooks twice. |
623369e5 | 726 | */ |
862e686c | 727 | drm_bridge_disable(encoder->bridge); |
623369e5 DV |
728 | |
729 | /* Right function depends upon target state. */ | |
2827635e NT |
730 | if (funcs) { |
731 | if (connector->state->crtc && funcs->prepare) | |
732 | funcs->prepare(encoder); | |
733 | else if (funcs->disable) | |
734 | funcs->disable(encoder); | |
735 | else if (funcs->dpms) | |
736 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
737 | } | |
623369e5 | 738 | |
862e686c | 739 | drm_bridge_post_disable(encoder->bridge); |
623369e5 DV |
740 | } |
741 | ||
df63b999 | 742 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 743 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
744 | |
745 | /* Shut down everything that needs a full modeset. */ | |
2465ff62 | 746 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
747 | continue; |
748 | ||
749 | if (!old_crtc_state->active) | |
623369e5 DV |
750 | continue; |
751 | ||
752 | funcs = crtc->helper_private; | |
753 | ||
fa3ab4c2 VS |
754 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n", |
755 | crtc->base.id, crtc->name); | |
95d6eb3b DV |
756 | |
757 | ||
623369e5 | 758 | /* Right function depends upon target state. */ |
ee0a89cf | 759 | if (crtc->state->enable && funcs->prepare) |
623369e5 | 760 | funcs->prepare(crtc); |
c9ac8b4c LY |
761 | else if (funcs->atomic_disable) |
762 | funcs->atomic_disable(crtc, old_crtc_state); | |
623369e5 DV |
763 | else if (funcs->disable) |
764 | funcs->disable(crtc); | |
765 | else | |
766 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
767 | } | |
768 | } | |
769 | ||
4c18d301 DV |
770 | /** |
771 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state | |
772 | * @dev: DRM device | |
773 | * @old_state: atomic state object with old state structures | |
774 | * | |
775 | * This function updates all the various legacy modeset state pointers in | |
776 | * connectors, encoders and crtcs. It also updates the timestamping constants | |
777 | * used for precise vblank timestamps by calling | |
778 | * drm_calc_timestamping_constants(). | |
779 | * | |
780 | * Drivers can use this for building their own atomic commit if they don't have | |
781 | * a pure helper-based modeset implementation. | |
782 | */ | |
783 | void | |
784 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, | |
785 | struct drm_atomic_state *old_state) | |
623369e5 | 786 | { |
df63b999 ACO |
787 | struct drm_connector *connector; |
788 | struct drm_connector_state *old_conn_state; | |
789 | struct drm_crtc *crtc; | |
790 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
791 | int i; |
792 | ||
8c10342c | 793 | /* clear out existing links and update dpms */ |
df63b999 | 794 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
8c10342c ML |
795 | if (connector->encoder) { |
796 | WARN_ON(!connector->encoder->crtc); | |
797 | ||
798 | connector->encoder->crtc = NULL; | |
799 | connector->encoder = NULL; | |
800 | } | |
623369e5 | 801 | |
8c10342c ML |
802 | crtc = connector->state->crtc; |
803 | if ((!crtc && old_conn_state->crtc) || | |
804 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { | |
805 | struct drm_property *dpms_prop = | |
806 | dev->mode_config.dpms_property; | |
807 | int mode = DRM_MODE_DPMS_OFF; | |
623369e5 | 808 | |
8c10342c ML |
809 | if (crtc && crtc->state->active) |
810 | mode = DRM_MODE_DPMS_ON; | |
811 | ||
812 | connector->dpms = mode; | |
813 | drm_object_property_set_value(&connector->base, | |
814 | dpms_prop, mode); | |
815 | } | |
623369e5 DV |
816 | } |
817 | ||
818 | /* set new links */ | |
df63b999 ACO |
819 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
820 | if (!connector->state->crtc) | |
623369e5 DV |
821 | continue; |
822 | ||
823 | if (WARN_ON(!connector->state->best_encoder)) | |
824 | continue; | |
825 | ||
826 | connector->encoder = connector->state->best_encoder; | |
827 | connector->encoder->crtc = connector->state->crtc; | |
828 | } | |
829 | ||
830 | /* set legacy state in the crtc structure */ | |
df63b999 | 831 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
2660801f ML |
832 | struct drm_plane *primary = crtc->primary; |
833 | ||
623369e5 DV |
834 | crtc->mode = crtc->state->mode; |
835 | crtc->enabled = crtc->state->enable; | |
2660801f ML |
836 | |
837 | if (drm_atomic_get_existing_plane_state(old_state, primary) && | |
838 | primary->state->crtc == crtc) { | |
839 | crtc->x = primary->state->src_x >> 16; | |
840 | crtc->y = primary->state->src_y >> 16; | |
841 | } | |
3d51d2d2 DV |
842 | |
843 | if (crtc->state->enable) | |
844 | drm_calc_timestamping_constants(crtc, | |
845 | &crtc->state->adjusted_mode); | |
623369e5 DV |
846 | } |
847 | } | |
4c18d301 | 848 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); |
623369e5 DV |
849 | |
850 | static void | |
851 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
852 | { | |
df63b999 ACO |
853 | struct drm_crtc *crtc; |
854 | struct drm_crtc_state *old_crtc_state; | |
855 | struct drm_connector *connector; | |
856 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
857 | int i; |
858 | ||
df63b999 | 859 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 860 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 861 | |
df63b999 | 862 | if (!crtc->state->mode_changed) |
623369e5 DV |
863 | continue; |
864 | ||
865 | funcs = crtc->helper_private; | |
866 | ||
c982bd90 | 867 | if (crtc->state->enable && funcs->mode_set_nofb) { |
fa3ab4c2 VS |
868 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n", |
869 | crtc->base.id, crtc->name); | |
95d6eb3b | 870 | |
623369e5 | 871 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 872 | } |
623369e5 DV |
873 | } |
874 | ||
df63b999 | 875 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 876 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 877 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
878 | struct drm_encoder *encoder; |
879 | struct drm_display_mode *mode, *adjusted_mode; | |
880 | ||
df63b999 | 881 | if (!connector->state->best_encoder) |
623369e5 DV |
882 | continue; |
883 | ||
884 | encoder = connector->state->best_encoder; | |
885 | funcs = encoder->helper_private; | |
886 | new_crtc_state = connector->state->crtc->state; | |
887 | mode = &new_crtc_state->mode; | |
888 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
889 | ||
eab3bbef DV |
890 | if (!new_crtc_state->mode_changed) |
891 | continue; | |
892 | ||
17a38d9c DV |
893 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
894 | encoder->base.id, encoder->name); | |
95d6eb3b | 895 | |
623369e5 DV |
896 | /* |
897 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 898 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 899 | */ |
fe4a11c9 PZ |
900 | if (funcs && funcs->atomic_mode_set) { |
901 | funcs->atomic_mode_set(encoder, new_crtc_state, | |
902 | connector->state); | |
903 | } else if (funcs && funcs->mode_set) { | |
c982bd90 | 904 | funcs->mode_set(encoder, mode, adjusted_mode); |
fe4a11c9 | 905 | } |
623369e5 | 906 | |
862e686c | 907 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
623369e5 DV |
908 | } |
909 | } | |
910 | ||
911 | /** | |
1af434a9 | 912 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 913 | * @dev: DRM device |
a072f809 | 914 | * @old_state: atomic state object with old state structures |
623369e5 | 915 | * |
1af434a9 | 916 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 917 | * prepares them (if required) with the new mode. |
1af434a9 | 918 | * |
60acc4eb | 919 | * For compatibility with legacy crtc helpers this should be called before |
1af434a9 DV |
920 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
921 | * does. But drivers with different needs can group the modeset commits together | |
922 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
923 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 924 | */ |
1af434a9 DV |
925 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
926 | struct drm_atomic_state *old_state) | |
623369e5 | 927 | { |
a072f809 | 928 | disable_outputs(dev, old_state); |
4c18d301 DV |
929 | |
930 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); | |
931 | ||
a072f809 | 932 | crtc_set_mode(dev, old_state); |
623369e5 | 933 | } |
1af434a9 | 934 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 DV |
935 | |
936 | /** | |
1af434a9 | 937 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
938 | * @dev: DRM device |
939 | * @old_state: atomic state object with old state structures | |
940 | * | |
1af434a9 DV |
941 | * This function enables all the outputs with the new configuration which had to |
942 | * be turned off for the update. | |
943 | * | |
60acc4eb | 944 | * For compatibility with legacy crtc helpers this should be called after |
1af434a9 DV |
945 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
946 | * does. But drivers with different needs can group the modeset commits together | |
947 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
948 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 949 | */ |
1af434a9 DV |
950 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
951 | struct drm_atomic_state *old_state) | |
623369e5 | 952 | { |
df63b999 ACO |
953 | struct drm_crtc *crtc; |
954 | struct drm_crtc_state *old_crtc_state; | |
955 | struct drm_connector *connector; | |
956 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
957 | int i; |
958 | ||
df63b999 | 959 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 960 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
961 | |
962 | /* Need to filter out CRTCs where only planes change. */ | |
2465ff62 | 963 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
964 | continue; |
965 | ||
966 | if (!crtc->state->active) | |
623369e5 DV |
967 | continue; |
968 | ||
969 | funcs = crtc->helper_private; | |
970 | ||
ee0a89cf | 971 | if (crtc->state->enable) { |
fa3ab4c2 VS |
972 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n", |
973 | crtc->base.id, crtc->name); | |
95d6eb3b | 974 | |
ee0a89cf DV |
975 | if (funcs->enable) |
976 | funcs->enable(crtc); | |
977 | else | |
978 | funcs->commit(crtc); | |
979 | } | |
623369e5 DV |
980 | } |
981 | ||
df63b999 | 982 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 983 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
984 | struct drm_encoder *encoder; |
985 | ||
df63b999 | 986 | if (!connector->state->best_encoder) |
623369e5 DV |
987 | continue; |
988 | ||
4218a32f | 989 | if (!connector->state->crtc->state->active || |
2465ff62 | 990 | !drm_atomic_crtc_needs_modeset(connector->state->crtc->state)) |
eab3bbef DV |
991 | continue; |
992 | ||
623369e5 DV |
993 | encoder = connector->state->best_encoder; |
994 | funcs = encoder->helper_private; | |
995 | ||
17a38d9c DV |
996 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
997 | encoder->base.id, encoder->name); | |
95d6eb3b | 998 | |
623369e5 DV |
999 | /* |
1000 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 1001 | * it away), so we won't call enable hooks twice. |
623369e5 | 1002 | */ |
862e686c | 1003 | drm_bridge_pre_enable(encoder->bridge); |
623369e5 | 1004 | |
2827635e NT |
1005 | if (funcs) { |
1006 | if (funcs->enable) | |
1007 | funcs->enable(encoder); | |
1008 | else if (funcs->commit) | |
1009 | funcs->commit(encoder); | |
1010 | } | |
623369e5 | 1011 | |
862e686c | 1012 | drm_bridge_enable(encoder->bridge); |
623369e5 DV |
1013 | } |
1014 | } | |
1af434a9 | 1015 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 1016 | |
4c5b7f3a RC |
1017 | /** |
1018 | * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state | |
1019 | * @dev: DRM device | |
1020 | * @state: atomic state object with old state structures | |
1ea0c02e DV |
1021 | * @pre_swap: If true, do an interruptible wait, and @state is the new state. |
1022 | * Otherwise @state is the old state. | |
4c5b7f3a RC |
1023 | * |
1024 | * For implicit sync, driver should fish the exclusive fence out from the | |
1025 | * incoming fb's and stash it in the drm_plane_state. This is called after | |
1026 | * drm_atomic_helper_swap_state() so it uses the current plane state (and | |
1027 | * just uses the atomic state to find the changed planes) | |
f6ce410a | 1028 | * |
1ea0c02e DV |
1029 | * Note that @pre_swap is needed since the point where we block for fences moves |
1030 | * around depending upon whether an atomic commit is blocking or | |
1031 | * non-blocking. For async commit all waiting needs to happen after | |
1032 | * drm_atomic_helper_swap_state() is called, but for synchronous commits we want | |
1033 | * to wait **before** we do anything that can't be easily rolled back. That is | |
1034 | * before we call drm_atomic_helper_swap_state(). | |
1035 | * | |
f54d1867 | 1036 | * Returns zero if success or < 0 if dma_fence_wait() fails. |
4c5b7f3a | 1037 | */ |
f6ce410a GP |
1038 | int drm_atomic_helper_wait_for_fences(struct drm_device *dev, |
1039 | struct drm_atomic_state *state, | |
1040 | bool pre_swap) | |
e2330f07 | 1041 | { |
df63b999 ACO |
1042 | struct drm_plane *plane; |
1043 | struct drm_plane_state *plane_state; | |
f6ce410a | 1044 | int i, ret; |
e2330f07 | 1045 | |
df63b999 | 1046 | for_each_plane_in_state(state, plane, plane_state, i) { |
f6ce410a GP |
1047 | if (!pre_swap) |
1048 | plane_state = plane->state; | |
1049 | ||
1050 | if (!plane_state->fence) | |
e2330f07 DV |
1051 | continue; |
1052 | ||
f6ce410a GP |
1053 | WARN_ON(!plane_state->fb); |
1054 | ||
1055 | /* | |
1056 | * If waiting for fences pre-swap (ie: nonblock), userspace can | |
1057 | * still interrupt the operation. Instead of blocking until the | |
1058 | * timer expires, make the wait interruptible. | |
1059 | */ | |
f54d1867 | 1060 | ret = dma_fence_wait(plane_state->fence, pre_swap); |
f6ce410a GP |
1061 | if (ret) |
1062 | return ret; | |
e2330f07 | 1063 | |
f54d1867 | 1064 | dma_fence_put(plane_state->fence); |
f6ce410a | 1065 | plane_state->fence = NULL; |
e2330f07 | 1066 | } |
f6ce410a GP |
1067 | |
1068 | return 0; | |
e2330f07 | 1069 | } |
4c5b7f3a | 1070 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences); |
e2330f07 | 1071 | |
5ee3229c RC |
1072 | /** |
1073 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
1074 | * @dev: DRM device | |
1075 | * @old_state: atomic state object with old state structures | |
1076 | * | |
1077 | * Helper to, after atomic commit, wait for vblanks on all effected | |
1078 | * crtcs (ie. before cleaning up old framebuffers using | |
ab58e338 DV |
1079 | * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
1080 | * framebuffers have actually changed to optimize for the legacy cursor and | |
1081 | * plane update use-case. | |
5ee3229c RC |
1082 | */ |
1083 | void | |
1084 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
1085 | struct drm_atomic_state *old_state) | |
623369e5 DV |
1086 | { |
1087 | struct drm_crtc *crtc; | |
1088 | struct drm_crtc_state *old_crtc_state; | |
623369e5 | 1089 | int i, ret; |
bdc57146 | 1090 | unsigned crtc_mask = 0; |
623369e5 | 1091 | |
bdc57146 ML |
1092 | /* |
1093 | * Legacy cursor ioctls are completely unsynced, and userspace | |
1094 | * relies on that (by doing tons of cursor updates). | |
1095 | */ | |
1096 | if (old_state->legacy_cursor_update) | |
1097 | return; | |
623369e5 | 1098 | |
bdc57146 ML |
1099 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
1100 | struct drm_crtc_state *new_crtc_state = crtc->state; | |
623369e5 | 1101 | |
a3fbb53f | 1102 | if (!new_crtc_state->active || !new_crtc_state->planes_changed) |
ab58e338 DV |
1103 | continue; |
1104 | ||
623369e5 DV |
1105 | ret = drm_crtc_vblank_get(crtc); |
1106 | if (ret != 0) | |
1107 | continue; | |
1108 | ||
bdc57146 ML |
1109 | crtc_mask |= drm_crtc_mask(crtc); |
1110 | old_state->crtcs[i].last_vblank_count = drm_crtc_vblank_count(crtc); | |
623369e5 DV |
1111 | } |
1112 | ||
df63b999 | 1113 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
bdc57146 | 1114 | if (!(crtc_mask & drm_crtc_mask(crtc))) |
623369e5 DV |
1115 | continue; |
1116 | ||
1117 | ret = wait_event_timeout(dev->vblank[i].queue, | |
bdc57146 | 1118 | old_state->crtcs[i].last_vblank_count != |
d4853630 | 1119 | drm_crtc_vblank_count(crtc), |
623369e5 DV |
1120 | msecs_to_jiffies(50)); |
1121 | ||
8d4d0d70 VS |
1122 | WARN(!ret, "[CRTC:%d] vblank wait timed out\n", crtc->base.id); |
1123 | ||
623369e5 DV |
1124 | drm_crtc_vblank_put(crtc); |
1125 | } | |
1126 | } | |
5ee3229c | 1127 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 DV |
1128 | |
1129 | /** | |
9f2a7950 | 1130 | * drm_atomic_helper_commit_tail - commit atomic update to hardware |
1ea0c02e | 1131 | * @old_state: atomic state object with old state structures |
623369e5 | 1132 | * |
6806cdf9 DV |
1133 | * This is the default implementation for the |
1134 | * &drm_mode_config_helper_funcs.atomic_commit_tail hook. | |
623369e5 | 1135 | * |
9f2a7950 DV |
1136 | * Note that the default ordering of how the various stages are called is to |
1137 | * match the legacy modeset helper library closest. One peculiarity of that is | |
1138 | * that it doesn't mesh well with runtime PM at all. | |
6e48ae32 | 1139 | * |
9f2a7950 | 1140 | * For drivers supporting runtime PM the recommended sequence is instead :: |
6e48ae32 | 1141 | * |
1ea0c02e | 1142 | * drm_atomic_helper_commit_modeset_disables(dev, old_state); |
6e48ae32 | 1143 | * |
1ea0c02e | 1144 | * drm_atomic_helper_commit_modeset_enables(dev, old_state); |
6e48ae32 | 1145 | * |
1ea0c02e | 1146 | * drm_atomic_helper_commit_planes(dev, old_state, |
2b58e98d | 1147 | * DRM_PLANE_COMMIT_ACTIVE_ONLY); |
6e48ae32 | 1148 | * |
9f2a7950 DV |
1149 | * for committing the atomic update to hardware. See the kerneldoc entries for |
1150 | * these three functions for more details. | |
1151 | */ | |
1ea0c02e | 1152 | void drm_atomic_helper_commit_tail(struct drm_atomic_state *old_state) |
9f2a7950 | 1153 | { |
1ea0c02e | 1154 | struct drm_device *dev = old_state->dev; |
9f2a7950 | 1155 | |
1ea0c02e | 1156 | drm_atomic_helper_commit_modeset_disables(dev, old_state); |
9f2a7950 | 1157 | |
1ea0c02e | 1158 | drm_atomic_helper_commit_planes(dev, old_state, 0); |
9f2a7950 | 1159 | |
1ea0c02e | 1160 | drm_atomic_helper_commit_modeset_enables(dev, old_state); |
9f2a7950 | 1161 | |
1ea0c02e | 1162 | drm_atomic_helper_commit_hw_done(old_state); |
9f2a7950 | 1163 | |
1ea0c02e | 1164 | drm_atomic_helper_wait_for_vblanks(dev, old_state); |
9f2a7950 | 1165 | |
1ea0c02e | 1166 | drm_atomic_helper_cleanup_planes(dev, old_state); |
9f2a7950 DV |
1167 | } |
1168 | EXPORT_SYMBOL(drm_atomic_helper_commit_tail); | |
1169 | ||
1ea0c02e | 1170 | static void commit_tail(struct drm_atomic_state *old_state) |
9f2a7950 | 1171 | { |
1ea0c02e | 1172 | struct drm_device *dev = old_state->dev; |
9f2a7950 DV |
1173 | struct drm_mode_config_helper_funcs *funcs; |
1174 | ||
1175 | funcs = dev->mode_config.helper_private; | |
1176 | ||
1ea0c02e | 1177 | drm_atomic_helper_wait_for_fences(dev, old_state, false); |
9f2a7950 | 1178 | |
1ea0c02e | 1179 | drm_atomic_helper_wait_for_dependencies(old_state); |
9f2a7950 DV |
1180 | |
1181 | if (funcs && funcs->atomic_commit_tail) | |
1ea0c02e | 1182 | funcs->atomic_commit_tail(old_state); |
9f2a7950 | 1183 | else |
1ea0c02e | 1184 | drm_atomic_helper_commit_tail(old_state); |
9f2a7950 | 1185 | |
1ea0c02e | 1186 | drm_atomic_helper_commit_cleanup_done(old_state); |
9f2a7950 | 1187 | |
1ea0c02e | 1188 | drm_atomic_state_put(old_state); |
9f2a7950 DV |
1189 | } |
1190 | ||
1191 | static void commit_work(struct work_struct *work) | |
1192 | { | |
1193 | struct drm_atomic_state *state = container_of(work, | |
1194 | struct drm_atomic_state, | |
1195 | commit_work); | |
1196 | commit_tail(state); | |
1197 | } | |
1198 | ||
1199 | /** | |
1200 | * drm_atomic_helper_commit - commit validated state object | |
1201 | * @dev: DRM device | |
1202 | * @state: the driver state object | |
1203 | * @nonblock: whether nonblocking behavior is requested. | |
1204 | * | |
1205 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
1206 | * object. This can still fail when e.g. the framebuffer reservation fails. This | |
1207 | * function implements nonblocking commits, using | |
1208 | * drm_atomic_helper_setup_commit() and related functions. | |
1209 | * | |
9f2a7950 | 1210 | * Committing the actual hardware state is done through the |
6806cdf9 DV |
1211 | * &drm_mode_config_helper_funcs.atomic_commit_tail callback, or it's default |
1212 | * implementation drm_atomic_helper_commit_tail(). | |
6e48ae32 | 1213 | * |
c39032a8 | 1214 | * RETURNS: |
623369e5 DV |
1215 | * Zero for success or -errno. |
1216 | */ | |
1217 | int drm_atomic_helper_commit(struct drm_device *dev, | |
1218 | struct drm_atomic_state *state, | |
286dbb8d | 1219 | bool nonblock) |
623369e5 DV |
1220 | { |
1221 | int ret; | |
1222 | ||
a095caa7 DV |
1223 | ret = drm_atomic_helper_setup_commit(state, nonblock); |
1224 | if (ret) | |
1225 | return ret; | |
1226 | ||
9f2a7950 DV |
1227 | INIT_WORK(&state->commit_work, commit_work); |
1228 | ||
623369e5 DV |
1229 | ret = drm_atomic_helper_prepare_planes(dev, state); |
1230 | if (ret) | |
1231 | return ret; | |
1232 | ||
f6ce410a GP |
1233 | if (!nonblock) { |
1234 | ret = drm_atomic_helper_wait_for_fences(dev, state, true); | |
aebe55c2 LP |
1235 | if (ret) { |
1236 | drm_atomic_helper_cleanup_planes(dev, state); | |
f6ce410a | 1237 | return ret; |
aebe55c2 | 1238 | } |
f6ce410a GP |
1239 | } |
1240 | ||
623369e5 DV |
1241 | /* |
1242 | * This is the point of no return - everything below never fails except | |
1243 | * when the hw goes bonghits. Which means we can commit the new state on | |
1244 | * the software side now. | |
1245 | */ | |
1246 | ||
5e84c269 | 1247 | drm_atomic_helper_swap_state(state, true); |
623369e5 DV |
1248 | |
1249 | /* | |
1250 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 1251 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
1252 | * that the asynchronous work has either been cancelled (if the driver |
1253 | * supports it, which at least requires that the framebuffers get | |
1254 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
1255 | * before the new state gets committed on the software side with | |
1256 | * drm_atomic_helper_swap_state(). | |
1257 | * | |
1258 | * This scheme allows new atomic state updates to be prepared and | |
1259 | * checked in parallel to the asynchronous completion of the previous | |
1260 | * update. Which is important since compositors need to figure out the | |
1261 | * composition of the next frame right after having submitted the | |
1262 | * current layout. | |
9f2a7950 DV |
1263 | * |
1264 | * NOTE: Commit work has multiple phases, first hardware commit, then | |
1265 | * cleanup. We want them to overlap, hence need system_unbound_wq to | |
1266 | * make sure work items don't artifically stall on each another. | |
623369e5 DV |
1267 | */ |
1268 | ||
0853695c | 1269 | drm_atomic_state_get(state); |
9f2a7950 DV |
1270 | if (nonblock) |
1271 | queue_work(system_unbound_wq, &state->commit_work); | |
1272 | else | |
1273 | commit_tail(state); | |
623369e5 DV |
1274 | |
1275 | return 0; | |
1276 | } | |
1277 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1278 | ||
e8c833a7 | 1279 | /** |
286dbb8d | 1280 | * DOC: implementing nonblocking commit |
e8c833a7 | 1281 | * |
9f2a7950 | 1282 | * Nonblocking atomic commits have to be implemented in the following sequence: |
e8c833a7 DV |
1283 | * |
1284 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
1285 | * which commit needs to call which can fail, so we want to run it first and | |
1286 | * synchronously. | |
1287 | * | |
286dbb8d | 1288 | * 2. Synchronize with any outstanding nonblocking commit worker threads which |
e8c833a7 DV |
1289 | * might be affected the new state update. This can be done by either cancelling |
1290 | * or flushing the work items, depending upon whether the driver can deal with | |
1291 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
1292 | * cleanup is still done when cancelling. | |
1293 | * | |
9f2a7950 DV |
1294 | * Asynchronous workers need to have sufficient parallelism to be able to run |
1295 | * different atomic commits on different CRTCs in parallel. The simplest way to | |
1296 | * achive this is by running them on the &system_unbound_wq work queue. Note | |
1297 | * that drivers are not required to split up atomic commits and run an | |
1298 | * individual commit in parallel - userspace is supposed to do that if it cares. | |
1299 | * But it might be beneficial to do that for modesets, since those necessarily | |
1300 | * must be done as one global operation, and enabling or disabling a CRTC can | |
1301 | * take a long time. But even that is not required. | |
e8c833a7 DV |
1302 | * |
1303 | * 3. The software state is updated synchronously with | |
26196f7e | 1304 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
e8c833a7 | 1305 | * locks means concurrent callers never see inconsistent state. And doing this |
286dbb8d ML |
1306 | * while it's guaranteed that no relevant nonblocking worker runs means that |
1307 | * nonblocking workers do not need grab any locks. Actually they must not grab | |
1308 | * locks, for otherwise the work flushing will deadlock. | |
e8c833a7 DV |
1309 | * |
1310 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1311 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1312 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
1313 | * being displayed. | |
9f2a7950 DV |
1314 | * |
1315 | * The above scheme is implemented in the atomic helper libraries in | |
1316 | * drm_atomic_helper_commit() using a bunch of helper functions. See | |
1317 | * drm_atomic_helper_setup_commit() for a starting point. | |
e8c833a7 DV |
1318 | */ |
1319 | ||
a095caa7 DV |
1320 | static int stall_checks(struct drm_crtc *crtc, bool nonblock) |
1321 | { | |
1322 | struct drm_crtc_commit *commit, *stall_commit = NULL; | |
1323 | bool completed = true; | |
1324 | int i; | |
1325 | long ret = 0; | |
1326 | ||
1327 | spin_lock(&crtc->commit_lock); | |
1328 | i = 0; | |
1329 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) { | |
1330 | if (i == 0) { | |
1331 | completed = try_wait_for_completion(&commit->flip_done); | |
1332 | /* Userspace is not allowed to get ahead of the previous | |
1333 | * commit with nonblocking ones. */ | |
1334 | if (!completed && nonblock) { | |
1335 | spin_unlock(&crtc->commit_lock); | |
1336 | return -EBUSY; | |
1337 | } | |
1338 | } else if (i == 1) { | |
1339 | stall_commit = commit; | |
1340 | drm_crtc_commit_get(stall_commit); | |
a095caa7 | 1341 | break; |
723c3e55 | 1342 | } |
a095caa7 DV |
1343 | |
1344 | i++; | |
1345 | } | |
1346 | spin_unlock(&crtc->commit_lock); | |
1347 | ||
1348 | if (!stall_commit) | |
1349 | return 0; | |
1350 | ||
1351 | /* We don't want to let commits get ahead of cleanup work too much, | |
1352 | * stalling on 2nd previous commit means triple-buffer won't ever stall. | |
1353 | */ | |
723c3e55 | 1354 | ret = wait_for_completion_interruptible_timeout(&stall_commit->cleanup_done, |
a095caa7 DV |
1355 | 10*HZ); |
1356 | if (ret == 0) | |
1357 | DRM_ERROR("[CRTC:%d:%s] cleanup_done timed out\n", | |
1358 | crtc->base.id, crtc->name); | |
1359 | ||
1360 | drm_crtc_commit_put(stall_commit); | |
1361 | ||
1362 | return ret < 0 ? ret : 0; | |
1363 | } | |
1364 | ||
899cc5f1 | 1365 | static void release_crtc_commit(struct completion *completion) |
24835e44 DV |
1366 | { |
1367 | struct drm_crtc_commit *commit = container_of(completion, | |
1368 | typeof(*commit), | |
1369 | flip_done); | |
1370 | ||
1371 | drm_crtc_commit_put(commit); | |
1372 | } | |
1373 | ||
a095caa7 DV |
1374 | /** |
1375 | * drm_atomic_helper_setup_commit - setup possibly nonblocking commit | |
1376 | * @state: new modeset state to be committed | |
1377 | * @nonblock: whether nonblocking behavior is requested. | |
1378 | * | |
1379 | * This function prepares @state to be used by the atomic helper's support for | |
1380 | * nonblocking commits. Drivers using the nonblocking commit infrastructure | |
6806cdf9 DV |
1381 | * should always call this function from their |
1382 | * &drm_mode_config_funcs.atomic_commit hook. | |
a095caa7 DV |
1383 | * |
1384 | * To be able to use this support drivers need to use a few more helper | |
1385 | * functions. drm_atomic_helper_wait_for_dependencies() must be called before | |
1386 | * actually committing the hardware state, and for nonblocking commits this call | |
1387 | * must be placed in the async worker. See also drm_atomic_helper_swap_state() | |
1388 | * and it's stall parameter, for when a driver's commit hooks look at the | |
6806cdf9 | 1389 | * &drm_crtc.state, &drm_plane.state or &drm_connector.state pointer directly. |
a095caa7 DV |
1390 | * |
1391 | * Completion of the hardware commit step must be signalled using | |
1392 | * drm_atomic_helper_commit_hw_done(). After this step the driver is not allowed | |
1393 | * to read or change any permanent software or hardware modeset state. The only | |
1394 | * exception is state protected by other means than &drm_modeset_lock locks. | |
1395 | * Only the free standing @state with pointers to the old state structures can | |
1396 | * be inspected, e.g. to clean up old buffers using | |
1397 | * drm_atomic_helper_cleanup_planes(). | |
1398 | * | |
1399 | * At the very end, before cleaning up @state drivers must call | |
1400 | * drm_atomic_helper_commit_cleanup_done(). | |
1401 | * | |
1402 | * This is all implemented by in drm_atomic_helper_commit(), giving drivers a | |
1403 | * complete and esay-to-use default implementation of the atomic_commit() hook. | |
1404 | * | |
1405 | * The tracking of asynchronously executed and still pending commits is done | |
1406 | * using the core structure &drm_crtc_commit. | |
1407 | * | |
1408 | * By default there's no need to clean up resources allocated by this function | |
1409 | * explicitly: drm_atomic_state_default_clear() will take care of that | |
1410 | * automatically. | |
1411 | * | |
1412 | * Returns: | |
1413 | * | |
1414 | * 0 on success. -EBUSY when userspace schedules nonblocking commits too fast, | |
1415 | * -ENOMEM on allocation failures and -EINTR when a signal is pending. | |
1416 | */ | |
1417 | int drm_atomic_helper_setup_commit(struct drm_atomic_state *state, | |
1418 | bool nonblock) | |
1419 | { | |
1420 | struct drm_crtc *crtc; | |
1421 | struct drm_crtc_state *crtc_state; | |
1422 | struct drm_crtc_commit *commit; | |
1423 | int i, ret; | |
1424 | ||
1425 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1426 | commit = kzalloc(sizeof(*commit), GFP_KERNEL); | |
1427 | if (!commit) | |
1428 | return -ENOMEM; | |
1429 | ||
1430 | init_completion(&commit->flip_done); | |
1431 | init_completion(&commit->hw_done); | |
1432 | init_completion(&commit->cleanup_done); | |
1433 | INIT_LIST_HEAD(&commit->commit_entry); | |
1434 | kref_init(&commit->ref); | |
1435 | commit->crtc = crtc; | |
1436 | ||
1437 | state->crtcs[i].commit = commit; | |
1438 | ||
1439 | ret = stall_checks(crtc, nonblock); | |
1440 | if (ret) | |
1441 | return ret; | |
1442 | ||
1443 | /* Drivers only send out events when at least either current or | |
1444 | * new CRTC state is active. Complete right away if everything | |
1445 | * stays off. */ | |
1446 | if (!crtc->state->active && !crtc_state->active) { | |
1447 | complete_all(&commit->flip_done); | |
1448 | continue; | |
1449 | } | |
1450 | ||
1451 | /* Legacy cursor updates are fully unsynced. */ | |
1452 | if (state->legacy_cursor_update) { | |
1453 | complete_all(&commit->flip_done); | |
1454 | continue; | |
1455 | } | |
1456 | ||
1457 | if (!crtc_state->event) { | |
1458 | commit->event = kzalloc(sizeof(*commit->event), | |
1459 | GFP_KERNEL); | |
1460 | if (!commit->event) | |
1461 | return -ENOMEM; | |
1462 | ||
1463 | crtc_state->event = commit->event; | |
1464 | } | |
1465 | ||
1466 | crtc_state->event->base.completion = &commit->flip_done; | |
24835e44 DV |
1467 | crtc_state->event->base.completion_release = release_crtc_commit; |
1468 | drm_crtc_commit_get(commit); | |
a095caa7 DV |
1469 | } |
1470 | ||
1471 | return 0; | |
1472 | } | |
1473 | EXPORT_SYMBOL(drm_atomic_helper_setup_commit); | |
1474 | ||
1475 | ||
1476 | static struct drm_crtc_commit *preceeding_commit(struct drm_crtc *crtc) | |
1477 | { | |
1478 | struct drm_crtc_commit *commit; | |
1479 | int i = 0; | |
1480 | ||
1481 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) { | |
1482 | /* skip the first entry, that's the current commit */ | |
1483 | if (i == 1) | |
1484 | return commit; | |
1485 | i++; | |
1486 | } | |
1487 | ||
1488 | return NULL; | |
1489 | } | |
1490 | ||
1491 | /** | |
1492 | * drm_atomic_helper_wait_for_dependencies - wait for required preceeding commits | |
1ea0c02e | 1493 | * @old_state: atomic state object with old state structures |
a095caa7 DV |
1494 | * |
1495 | * This function waits for all preceeding commits that touch the same CRTC as | |
1ea0c02e | 1496 | * @old_state to both be committed to the hardware (as signalled by |
a095caa7 | 1497 | * drm_atomic_helper_commit_hw_done) and executed by the hardware (as signalled |
6806cdf9 | 1498 | * by calling drm_crtc_vblank_send_event() on the &drm_crtc_state.event). |
a095caa7 DV |
1499 | * |
1500 | * This is part of the atomic helper support for nonblocking commits, see | |
1501 | * drm_atomic_helper_setup_commit() for an overview. | |
1502 | */ | |
1ea0c02e | 1503 | void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *old_state) |
a095caa7 DV |
1504 | { |
1505 | struct drm_crtc *crtc; | |
1506 | struct drm_crtc_state *crtc_state; | |
1507 | struct drm_crtc_commit *commit; | |
1508 | int i; | |
1509 | long ret; | |
1510 | ||
1ea0c02e | 1511 | for_each_crtc_in_state(old_state, crtc, crtc_state, i) { |
a095caa7 DV |
1512 | spin_lock(&crtc->commit_lock); |
1513 | commit = preceeding_commit(crtc); | |
1514 | if (commit) | |
1515 | drm_crtc_commit_get(commit); | |
1516 | spin_unlock(&crtc->commit_lock); | |
1517 | ||
1518 | if (!commit) | |
1519 | continue; | |
1520 | ||
1521 | ret = wait_for_completion_timeout(&commit->hw_done, | |
1522 | 10*HZ); | |
1523 | if (ret == 0) | |
1524 | DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n", | |
1525 | crtc->base.id, crtc->name); | |
1526 | ||
1527 | /* Currently no support for overwriting flips, hence | |
1528 | * stall for previous one to execute completely. */ | |
1529 | ret = wait_for_completion_timeout(&commit->flip_done, | |
1530 | 10*HZ); | |
1531 | if (ret == 0) | |
1532 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
1533 | crtc->base.id, crtc->name); | |
1534 | ||
1535 | drm_crtc_commit_put(commit); | |
1536 | } | |
1537 | } | |
1538 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies); | |
1539 | ||
1540 | /** | |
1541 | * drm_atomic_helper_commit_hw_done - setup possible nonblocking commit | |
1ea0c02e | 1542 | * @old_state: atomic state object with old state structures |
a095caa7 DV |
1543 | * |
1544 | * This function is used to signal completion of the hardware commit step. After | |
1545 | * this step the driver is not allowed to read or change any permanent software | |
1546 | * or hardware modeset state. The only exception is state protected by other | |
1547 | * means than &drm_modeset_lock locks. | |
1548 | * | |
1549 | * Drivers should try to postpone any expensive or delayed cleanup work after | |
1550 | * this function is called. | |
1551 | * | |
1552 | * This is part of the atomic helper support for nonblocking commits, see | |
1553 | * drm_atomic_helper_setup_commit() for an overview. | |
1554 | */ | |
1ea0c02e | 1555 | void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *old_state) |
a095caa7 DV |
1556 | { |
1557 | struct drm_crtc *crtc; | |
1558 | struct drm_crtc_state *crtc_state; | |
1559 | struct drm_crtc_commit *commit; | |
1560 | int i; | |
1561 | ||
1ea0c02e DV |
1562 | for_each_crtc_in_state(old_state, crtc, crtc_state, i) { |
1563 | commit = old_state->crtcs[i].commit; | |
a095caa7 DV |
1564 | if (!commit) |
1565 | continue; | |
1566 | ||
1567 | /* backend must have consumed any event by now */ | |
1568 | WARN_ON(crtc->state->event); | |
1569 | spin_lock(&crtc->commit_lock); | |
1570 | complete_all(&commit->hw_done); | |
1571 | spin_unlock(&crtc->commit_lock); | |
1572 | } | |
1573 | } | |
1574 | EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done); | |
1575 | ||
1576 | /** | |
1577 | * drm_atomic_helper_commit_cleanup_done - signal completion of commit | |
1ea0c02e | 1578 | * @old_state: atomic state object with old state structures |
a095caa7 | 1579 | * |
1ea0c02e DV |
1580 | * This signals completion of the atomic update @old_state, including any |
1581 | * cleanup work. If used, it must be called right before calling | |
0853695c | 1582 | * drm_atomic_state_put(). |
a095caa7 DV |
1583 | * |
1584 | * This is part of the atomic helper support for nonblocking commits, see | |
1585 | * drm_atomic_helper_setup_commit() for an overview. | |
1586 | */ | |
1ea0c02e | 1587 | void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *old_state) |
a095caa7 DV |
1588 | { |
1589 | struct drm_crtc *crtc; | |
1590 | struct drm_crtc_state *crtc_state; | |
1591 | struct drm_crtc_commit *commit; | |
1592 | int i; | |
1593 | long ret; | |
1594 | ||
1ea0c02e DV |
1595 | for_each_crtc_in_state(old_state, crtc, crtc_state, i) { |
1596 | commit = old_state->crtcs[i].commit; | |
a095caa7 DV |
1597 | if (WARN_ON(!commit)) |
1598 | continue; | |
1599 | ||
1600 | spin_lock(&crtc->commit_lock); | |
1601 | complete_all(&commit->cleanup_done); | |
1602 | WARN_ON(!try_wait_for_completion(&commit->hw_done)); | |
1603 | ||
1604 | /* commit_list borrows our reference, need to remove before we | |
1605 | * clean up our drm_atomic_state. But only after it actually | |
1606 | * completed, otherwise subsequent commits won't stall properly. */ | |
7deef7f1 DV |
1607 | if (try_wait_for_completion(&commit->flip_done)) |
1608 | goto del_commit; | |
a095caa7 DV |
1609 | |
1610 | spin_unlock(&crtc->commit_lock); | |
1611 | ||
1612 | /* We must wait for the vblank event to signal our completion | |
1613 | * before releasing our reference, since the vblank work does | |
1614 | * not hold a reference of its own. */ | |
1615 | ret = wait_for_completion_timeout(&commit->flip_done, | |
1616 | 10*HZ); | |
1617 | if (ret == 0) | |
1618 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
1619 | crtc->base.id, crtc->name); | |
1620 | ||
1621 | spin_lock(&crtc->commit_lock); | |
7deef7f1 | 1622 | del_commit: |
a095caa7 DV |
1623 | list_del(&commit->commit_entry); |
1624 | spin_unlock(&crtc->commit_lock); | |
1625 | } | |
1626 | } | |
1627 | EXPORT_SYMBOL(drm_atomic_helper_commit_cleanup_done); | |
1628 | ||
c2fcd274 | 1629 | /** |
2e3afd47 | 1630 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 1631 | * @dev: DRM device |
2e3afd47 | 1632 | * @state: atomic state object with new state structures |
c2fcd274 DV |
1633 | * |
1634 | * This function prepares plane state, specifically framebuffers, for the new | |
6806cdf9 DV |
1635 | * configuration, by calling &drm_plane_helper_funcs.prepare_fb. If any failure |
1636 | * is encountered this function will call &drm_plane_helper_funcs.cleanup_fb on | |
1637 | * any already successfully prepared framebuffer. | |
c2fcd274 DV |
1638 | * |
1639 | * Returns: | |
1640 | * 0 on success, negative error code on failure. | |
1641 | */ | |
1642 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
1643 | struct drm_atomic_state *state) | |
1644 | { | |
be9174a4 DV |
1645 | struct drm_plane *plane; |
1646 | struct drm_plane_state *plane_state; | |
1647 | int ret, i, j; | |
c2fcd274 | 1648 | |
be9174a4 | 1649 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 1650 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
1651 | |
1652 | funcs = plane->helper_private; | |
1653 | ||
844f9111 ML |
1654 | if (funcs->prepare_fb) { |
1655 | ret = funcs->prepare_fb(plane, plane_state); | |
c2fcd274 DV |
1656 | if (ret) |
1657 | goto fail; | |
1658 | } | |
1659 | } | |
1660 | ||
1661 | return 0; | |
1662 | ||
1663 | fail: | |
be9174a4 | 1664 | for_each_plane_in_state(state, plane, plane_state, j) { |
b5ceff20 | 1665 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1666 | |
be9174a4 | 1667 | if (j >= i) |
c2fcd274 DV |
1668 | continue; |
1669 | ||
1670 | funcs = plane->helper_private; | |
1671 | ||
844f9111 ML |
1672 | if (funcs->cleanup_fb) |
1673 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1674 | } |
1675 | ||
1676 | return ret; | |
1677 | } | |
1678 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
1679 | ||
7135ac54 | 1680 | static bool plane_crtc_active(const struct drm_plane_state *state) |
aef9dbb8 DV |
1681 | { |
1682 | return state->crtc && state->crtc->state->active; | |
1683 | } | |
1684 | ||
c2fcd274 DV |
1685 | /** |
1686 | * drm_atomic_helper_commit_planes - commit plane state | |
1687 | * @dev: DRM device | |
b0fcfc89 | 1688 | * @old_state: atomic state object with old state structures |
2b58e98d | 1689 | * @flags: flags for committing plane state |
c2fcd274 DV |
1690 | * |
1691 | * This function commits the new plane state using the plane and atomic helper | |
1692 | * functions for planes and crtcs. It assumes that the atomic state has already | |
1693 | * been pushed into the relevant object state pointers, since this step can no | |
1694 | * longer fail. | |
1695 | * | |
b0fcfc89 | 1696 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 | 1697 | * crtcs need to be updated though. |
de28d021 ML |
1698 | * |
1699 | * Note that this function does all plane updates across all CRTCs in one step. | |
1700 | * If the hardware can't support this approach look at | |
1701 | * drm_atomic_helper_commit_planes_on_crtc() instead. | |
6e48ae32 DV |
1702 | * |
1703 | * Plane parameters can be updated by applications while the associated CRTC is | |
1704 | * disabled. The DRM/KMS core will store the parameters in the plane state, | |
1705 | * which will be available to the driver when the CRTC is turned on. As a result | |
1706 | * most drivers don't need to be immediately notified of plane updates for a | |
1707 | * disabled CRTC. | |
1708 | * | |
2b58e98d LY |
1709 | * Unless otherwise needed, drivers are advised to set the ACTIVE_ONLY flag in |
1710 | * @flags in order not to receive plane update notifications related to a | |
1711 | * disabled CRTC. This avoids the need to manually ignore plane updates in | |
6e48ae32 DV |
1712 | * driver code when the driver and/or hardware can't or just don't need to deal |
1713 | * with updates on disabled CRTCs, for example when supporting runtime PM. | |
1714 | * | |
2b58e98d LY |
1715 | * Drivers may set the NO_DISABLE_AFTER_MODESET flag in @flags if the relevant |
1716 | * display controllers require to disable a CRTC's planes when the CRTC is | |
6806cdf9 DV |
1717 | * disabled. This function would skip the &drm_plane_helper_funcs.atomic_disable |
1718 | * call for a plane if the CRTC of the old plane state needs a modesetting | |
1719 | * operation. Of course, the drivers need to disable the planes in their CRTC | |
1720 | * disable callbacks since no one else would do that. | |
2b58e98d LY |
1721 | * |
1722 | * The drm_atomic_helper_commit() default implementation doesn't set the | |
1723 | * ACTIVE_ONLY flag to most closely match the behaviour of the legacy helpers. | |
1724 | * This should not be copied blindly by drivers. | |
c2fcd274 DV |
1725 | */ |
1726 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
aef9dbb8 | 1727 | struct drm_atomic_state *old_state, |
2b58e98d | 1728 | uint32_t flags) |
c2fcd274 | 1729 | { |
df63b999 ACO |
1730 | struct drm_crtc *crtc; |
1731 | struct drm_crtc_state *old_crtc_state; | |
1732 | struct drm_plane *plane; | |
1733 | struct drm_plane_state *old_plane_state; | |
c2fcd274 | 1734 | int i; |
2b58e98d LY |
1735 | bool active_only = flags & DRM_PLANE_COMMIT_ACTIVE_ONLY; |
1736 | bool no_disable = flags & DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET; | |
c2fcd274 | 1737 | |
df63b999 | 1738 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1739 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1740 | |
1741 | funcs = crtc->helper_private; | |
1742 | ||
1743 | if (!funcs || !funcs->atomic_begin) | |
1744 | continue; | |
1745 | ||
aef9dbb8 DV |
1746 | if (active_only && !crtc->state->active) |
1747 | continue; | |
1748 | ||
613d2b27 | 1749 | funcs->atomic_begin(crtc, old_crtc_state); |
c2fcd274 DV |
1750 | } |
1751 | ||
df63b999 | 1752 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
b5ceff20 | 1753 | const struct drm_plane_helper_funcs *funcs; |
216c59d6 | 1754 | bool disabling; |
c2fcd274 DV |
1755 | |
1756 | funcs = plane->helper_private; | |
1757 | ||
3cad4b68 | 1758 | if (!funcs) |
c2fcd274 DV |
1759 | continue; |
1760 | ||
216c59d6 LP |
1761 | disabling = drm_atomic_plane_disabling(plane, old_plane_state); |
1762 | ||
1763 | if (active_only) { | |
1764 | /* | |
1765 | * Skip planes related to inactive CRTCs. If the plane | |
1766 | * is enabled use the state of the current CRTC. If the | |
1767 | * plane is being disabled use the state of the old | |
1768 | * CRTC to avoid skipping planes being disabled on an | |
1769 | * active CRTC. | |
1770 | */ | |
1771 | if (!disabling && !plane_crtc_active(plane->state)) | |
1772 | continue; | |
1773 | if (disabling && !plane_crtc_active(old_plane_state)) | |
1774 | continue; | |
1775 | } | |
aef9dbb8 | 1776 | |
407b8bd9 TR |
1777 | /* |
1778 | * Special-case disabling the plane if drivers support it. | |
1779 | */ | |
2b58e98d LY |
1780 | if (disabling && funcs->atomic_disable) { |
1781 | struct drm_crtc_state *crtc_state; | |
1782 | ||
1783 | crtc_state = old_plane_state->crtc->state; | |
1784 | ||
1785 | if (drm_atomic_crtc_needs_modeset(crtc_state) && | |
1786 | no_disable) | |
1787 | continue; | |
1788 | ||
407b8bd9 | 1789 | funcs->atomic_disable(plane, old_plane_state); |
2b58e98d | 1790 | } else if (plane->state->crtc || disabling) { |
407b8bd9 | 1791 | funcs->atomic_update(plane, old_plane_state); |
2b58e98d | 1792 | } |
c2fcd274 DV |
1793 | } |
1794 | ||
df63b999 | 1795 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1796 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1797 | |
1798 | funcs = crtc->helper_private; | |
1799 | ||
1800 | if (!funcs || !funcs->atomic_flush) | |
1801 | continue; | |
1802 | ||
aef9dbb8 DV |
1803 | if (active_only && !crtc->state->active) |
1804 | continue; | |
1805 | ||
613d2b27 | 1806 | funcs->atomic_flush(crtc, old_crtc_state); |
c2fcd274 DV |
1807 | } |
1808 | } | |
1809 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1810 | ||
de28d021 ML |
1811 | /** |
1812 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc | |
1813 | * @old_crtc_state: atomic state object with the old crtc state | |
1814 | * | |
1815 | * This function commits the new plane state using the plane and atomic helper | |
1816 | * functions for planes on the specific crtc. It assumes that the atomic state | |
1817 | * has already been pushed into the relevant object state pointers, since this | |
1818 | * step can no longer fail. | |
1819 | * | |
1820 | * This function is useful when plane updates should be done crtc-by-crtc | |
1821 | * instead of one global step like drm_atomic_helper_commit_planes() does. | |
1822 | * | |
1823 | * This function can only be savely used when planes are not allowed to move | |
1824 | * between different CRTCs because this function doesn't handle inter-CRTC | |
1825 | * depencies. Callers need to ensure that either no such depencies exist, | |
1826 | * resolve them through ordering of commit calls or through some other means. | |
1827 | */ | |
1828 | void | |
1829 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) | |
1830 | { | |
1831 | const struct drm_crtc_helper_funcs *crtc_funcs; | |
1832 | struct drm_crtc *crtc = old_crtc_state->crtc; | |
1833 | struct drm_atomic_state *old_state = old_crtc_state->state; | |
1834 | struct drm_plane *plane; | |
1835 | unsigned plane_mask; | |
1836 | ||
1837 | plane_mask = old_crtc_state->plane_mask; | |
1838 | plane_mask |= crtc->state->plane_mask; | |
1839 | ||
1840 | crtc_funcs = crtc->helper_private; | |
1841 | if (crtc_funcs && crtc_funcs->atomic_begin) | |
613d2b27 | 1842 | crtc_funcs->atomic_begin(crtc, old_crtc_state); |
de28d021 ML |
1843 | |
1844 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { | |
1845 | struct drm_plane_state *old_plane_state = | |
1846 | drm_atomic_get_existing_plane_state(old_state, plane); | |
1847 | const struct drm_plane_helper_funcs *plane_funcs; | |
1848 | ||
1849 | plane_funcs = plane->helper_private; | |
1850 | ||
1851 | if (!old_plane_state || !plane_funcs) | |
1852 | continue; | |
1853 | ||
1854 | WARN_ON(plane->state->crtc && plane->state->crtc != crtc); | |
1855 | ||
1856 | if (drm_atomic_plane_disabling(plane, old_plane_state) && | |
1857 | plane_funcs->atomic_disable) | |
1858 | plane_funcs->atomic_disable(plane, old_plane_state); | |
1859 | else if (plane->state->crtc || | |
1860 | drm_atomic_plane_disabling(plane, old_plane_state)) | |
1861 | plane_funcs->atomic_update(plane, old_plane_state); | |
1862 | } | |
1863 | ||
1864 | if (crtc_funcs && crtc_funcs->atomic_flush) | |
613d2b27 | 1865 | crtc_funcs->atomic_flush(crtc, old_crtc_state); |
de28d021 ML |
1866 | } |
1867 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); | |
1868 | ||
6753ba97 JS |
1869 | /** |
1870 | * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes | |
28500291 | 1871 | * @old_crtc_state: atomic state object with the old CRTC state |
6753ba97 JS |
1872 | * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks |
1873 | * | |
1874 | * Disables all planes associated with the given CRTC. This can be | |
28500291 LY |
1875 | * used for instance in the CRTC helper atomic_disable callback to disable |
1876 | * all planes. | |
6753ba97 JS |
1877 | * |
1878 | * If the atomic-parameter is set the function calls the CRTC's | |
1879 | * atomic_begin hook before and atomic_flush hook after disabling the | |
1880 | * planes. | |
1881 | * | |
1882 | * It is a bug to call this function without having implemented the | |
6806cdf9 | 1883 | * &drm_plane_helper_funcs.atomic_disable plane hook. |
6753ba97 | 1884 | */ |
28500291 LY |
1885 | void |
1886 | drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state, | |
1887 | bool atomic) | |
6753ba97 | 1888 | { |
28500291 | 1889 | struct drm_crtc *crtc = old_crtc_state->crtc; |
6753ba97 JS |
1890 | const struct drm_crtc_helper_funcs *crtc_funcs = |
1891 | crtc->helper_private; | |
1892 | struct drm_plane *plane; | |
1893 | ||
1894 | if (atomic && crtc_funcs && crtc_funcs->atomic_begin) | |
1895 | crtc_funcs->atomic_begin(crtc, NULL); | |
1896 | ||
28500291 | 1897 | drm_atomic_crtc_state_for_each_plane(plane, old_crtc_state) { |
6753ba97 JS |
1898 | const struct drm_plane_helper_funcs *plane_funcs = |
1899 | plane->helper_private; | |
1900 | ||
28500291 | 1901 | if (!plane_funcs) |
6753ba97 JS |
1902 | continue; |
1903 | ||
1904 | WARN_ON(!plane_funcs->atomic_disable); | |
1905 | if (plane_funcs->atomic_disable) | |
1906 | plane_funcs->atomic_disable(plane, NULL); | |
1907 | } | |
1908 | ||
1909 | if (atomic && crtc_funcs && crtc_funcs->atomic_flush) | |
1910 | crtc_funcs->atomic_flush(crtc, NULL); | |
1911 | } | |
1912 | EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); | |
1913 | ||
c2fcd274 DV |
1914 | /** |
1915 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1916 | * @dev: DRM device | |
1917 | * @old_state: atomic state object with old state structures | |
1918 | * | |
1919 | * This function cleans up plane state, specifically framebuffers, from the old | |
1920 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1921 | * be able to call this function. | |
1922 | * | |
1923 | * This function must also be called on the new state when the atomic update | |
1924 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1925 | */ | |
1926 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1927 | struct drm_atomic_state *old_state) | |
1928 | { | |
df63b999 ACO |
1929 | struct drm_plane *plane; |
1930 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
1931 | int i; |
1932 | ||
df63b999 | 1933 | for_each_plane_in_state(old_state, plane, plane_state, i) { |
b5ceff20 | 1934 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1935 | |
c2fcd274 DV |
1936 | funcs = plane->helper_private; |
1937 | ||
844f9111 ML |
1938 | if (funcs->cleanup_fb) |
1939 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1940 | } |
1941 | } | |
1942 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1943 | ||
1944 | /** | |
1945 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
c2fcd274 | 1946 | * @state: atomic state |
5e84c269 | 1947 | * @stall: stall for proceeding commits |
c2fcd274 DV |
1948 | * |
1949 | * This function stores the atomic state into the current state pointers in all | |
1950 | * driver objects. It should be called after all failing steps have been done | |
1951 | * and succeeded, but before the actual hardware state is committed. | |
1952 | * | |
1953 | * For cleanup and error recovery the current state for all changed objects will | |
1954 | * be swaped into @state. | |
1955 | * | |
1956 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1957 | * | |
1958 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1959 | * | |
1960 | * 2. Do any other steps that might fail. | |
1961 | * | |
1962 | * 3. Put the staged state into the current state pointers with this function. | |
1963 | * | |
1964 | * 4. Actually commit the hardware state. | |
1965 | * | |
26196f7e | 1966 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
c2fcd274 | 1967 | * contains the old state. Also do any other cleanup required with that state. |
a095caa7 DV |
1968 | * |
1969 | * @stall must be set when nonblocking commits for this driver directly access | |
6806cdf9 DV |
1970 | * the &drm_plane.state, &drm_crtc.state or &drm_connector.state pointer. With |
1971 | * the current atomic helpers this is almost always the case, since the helpers | |
a095caa7 | 1972 | * don't pass the right state structures to the callbacks. |
c2fcd274 | 1973 | */ |
5e84c269 DV |
1974 | void drm_atomic_helper_swap_state(struct drm_atomic_state *state, |
1975 | bool stall) | |
c2fcd274 DV |
1976 | { |
1977 | int i; | |
a095caa7 | 1978 | long ret; |
be9174a4 DV |
1979 | struct drm_connector *connector; |
1980 | struct drm_connector_state *conn_state; | |
1981 | struct drm_crtc *crtc; | |
1982 | struct drm_crtc_state *crtc_state; | |
1983 | struct drm_plane *plane; | |
1984 | struct drm_plane_state *plane_state; | |
a095caa7 DV |
1985 | struct drm_crtc_commit *commit; |
1986 | ||
1987 | if (stall) { | |
1988 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1989 | spin_lock(&crtc->commit_lock); | |
1990 | commit = list_first_entry_or_null(&crtc->commit_list, | |
1991 | struct drm_crtc_commit, commit_entry); | |
1992 | if (commit) | |
1993 | drm_crtc_commit_get(commit); | |
1994 | spin_unlock(&crtc->commit_lock); | |
1995 | ||
1996 | if (!commit) | |
1997 | continue; | |
1998 | ||
1999 | ret = wait_for_completion_timeout(&commit->hw_done, | |
2000 | 10*HZ); | |
2001 | if (ret == 0) | |
2002 | DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n", | |
2003 | crtc->base.id, crtc->name); | |
2004 | drm_crtc_commit_put(commit); | |
2005 | } | |
2006 | } | |
c2fcd274 | 2007 | |
be9174a4 | 2008 | for_each_connector_in_state(state, connector, conn_state, i) { |
c2fcd274 | 2009 | connector->state->state = state; |
63e83c1d | 2010 | swap(state->connectors[i].state, connector->state); |
c2fcd274 DV |
2011 | connector->state->state = NULL; |
2012 | } | |
2013 | ||
be9174a4 | 2014 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
c2fcd274 | 2015 | crtc->state->state = state; |
5d943aa6 | 2016 | swap(state->crtcs[i].state, crtc->state); |
c2fcd274 | 2017 | crtc->state->state = NULL; |
a095caa7 DV |
2018 | |
2019 | if (state->crtcs[i].commit) { | |
2020 | spin_lock(&crtc->commit_lock); | |
2021 | list_add(&state->crtcs[i].commit->commit_entry, | |
2022 | &crtc->commit_list); | |
2023 | spin_unlock(&crtc->commit_lock); | |
2024 | ||
2025 | state->crtcs[i].commit->event = NULL; | |
2026 | } | |
c2fcd274 DV |
2027 | } |
2028 | ||
be9174a4 | 2029 | for_each_plane_in_state(state, plane, plane_state, i) { |
c2fcd274 | 2030 | plane->state->state = state; |
b8b5342b | 2031 | swap(state->planes[i].state, plane->state); |
c2fcd274 DV |
2032 | plane->state->state = NULL; |
2033 | } | |
2034 | } | |
2035 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
2036 | |
2037 | /** | |
2038 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
2039 | * @plane: plane object to update | |
2040 | * @crtc: owning CRTC of owning plane | |
2041 | * @fb: framebuffer to flip onto plane | |
2042 | * @crtc_x: x offset of primary plane on crtc | |
2043 | * @crtc_y: y offset of primary plane on crtc | |
2044 | * @crtc_w: width of primary plane rectangle on crtc | |
2045 | * @crtc_h: height of primary plane rectangle on crtc | |
2046 | * @src_x: x offset of @fb for panning | |
2047 | * @src_y: y offset of @fb for panning | |
2048 | * @src_w: width of source rectangle in @fb | |
2049 | * @src_h: height of source rectangle in @fb | |
2050 | * | |
2051 | * Provides a default plane update handler using the atomic driver interface. | |
2052 | * | |
2053 | * RETURNS: | |
2054 | * Zero on success, error code on failure | |
2055 | */ | |
2056 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
2057 | struct drm_crtc *crtc, | |
2058 | struct drm_framebuffer *fb, | |
2059 | int crtc_x, int crtc_y, | |
2060 | unsigned int crtc_w, unsigned int crtc_h, | |
2061 | uint32_t src_x, uint32_t src_y, | |
2062 | uint32_t src_w, uint32_t src_h) | |
2063 | { | |
2064 | struct drm_atomic_state *state; | |
2065 | struct drm_plane_state *plane_state; | |
2066 | int ret = 0; | |
2067 | ||
2068 | state = drm_atomic_state_alloc(plane->dev); | |
2069 | if (!state) | |
2070 | return -ENOMEM; | |
2071 | ||
2072 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2073 | retry: | |
2074 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2075 | if (IS_ERR(plane_state)) { | |
2076 | ret = PTR_ERR(plane_state); | |
2077 | goto fail; | |
2078 | } | |
2079 | ||
07cc0ef6 | 2080 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
2081 | if (ret != 0) |
2082 | goto fail; | |
321ebf04 | 2083 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
2084 | plane_state->crtc_x = crtc_x; |
2085 | plane_state->crtc_y = crtc_y; | |
042652ed | 2086 | plane_state->crtc_w = crtc_w; |
02e6f379 | 2087 | plane_state->crtc_h = crtc_h; |
042652ed DV |
2088 | plane_state->src_x = src_x; |
2089 | plane_state->src_y = src_y; | |
042652ed | 2090 | plane_state->src_w = src_w; |
02e6f379 | 2091 | plane_state->src_h = src_h; |
042652ed | 2092 | |
3671c580 DV |
2093 | if (plane == crtc->cursor) |
2094 | state->legacy_cursor_update = true; | |
2095 | ||
042652ed | 2096 | ret = drm_atomic_commit(state); |
042652ed DV |
2097 | fail: |
2098 | if (ret == -EDEADLK) | |
2099 | goto backoff; | |
2100 | ||
0853695c | 2101 | drm_atomic_state_put(state); |
042652ed | 2102 | return ret; |
0853695c | 2103 | |
042652ed | 2104 | backoff: |
042652ed | 2105 | drm_atomic_state_clear(state); |
6f75cea6 | 2106 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2107 | |
2108 | /* | |
2109 | * Someone might have exchanged the framebuffer while we dropped locks | |
2110 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2111 | * core does for us. | |
2112 | */ | |
2113 | plane->old_fb = plane->fb; | |
2114 | ||
2115 | goto retry; | |
2116 | } | |
2117 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
2118 | ||
2119 | /** | |
2120 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
2121 | * @plane: plane to disable | |
2122 | * | |
2123 | * Provides a default plane disable handler using the atomic driver interface. | |
2124 | * | |
2125 | * RETURNS: | |
2126 | * Zero on success, error code on failure | |
2127 | */ | |
2128 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
2129 | { | |
2130 | struct drm_atomic_state *state; | |
2131 | struct drm_plane_state *plane_state; | |
2132 | int ret = 0; | |
2133 | ||
aa54e2ee JSP |
2134 | /* |
2135 | * FIXME: Without plane->crtc set we can't get at the implicit legacy | |
2136 | * acquire context. The real fix will be to wire the acquire ctx through | |
2137 | * everywhere we need it, but meanwhile prevent chaos by just skipping | |
2138 | * this noop. The critical case is the cursor ioctls which a) only grab | |
2139 | * crtc/cursor-plane locks (so we need the crtc to get at the right | |
2140 | * acquire context) and b) can try to disable the plane multiple times. | |
2141 | */ | |
2142 | if (!plane->crtc) | |
2143 | return 0; | |
2144 | ||
042652ed DV |
2145 | state = drm_atomic_state_alloc(plane->dev); |
2146 | if (!state) | |
2147 | return -ENOMEM; | |
2148 | ||
2149 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
2150 | retry: | |
2151 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2152 | if (IS_ERR(plane_state)) { | |
2153 | ret = PTR_ERR(plane_state); | |
2154 | goto fail; | |
2155 | } | |
2156 | ||
24e79d0d ML |
2157 | if (plane_state->crtc && (plane == plane->crtc->cursor)) |
2158 | plane_state->state->legacy_cursor_update = true; | |
2159 | ||
bbb1e524 | 2160 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
042652ed DV |
2161 | if (ret != 0) |
2162 | goto fail; | |
f02ad907 | 2163 | |
042652ed | 2164 | ret = drm_atomic_commit(state); |
042652ed DV |
2165 | fail: |
2166 | if (ret == -EDEADLK) | |
2167 | goto backoff; | |
2168 | ||
0853695c | 2169 | drm_atomic_state_put(state); |
042652ed | 2170 | return ret; |
0853695c | 2171 | |
042652ed | 2172 | backoff: |
042652ed | 2173 | drm_atomic_state_clear(state); |
6f75cea6 | 2174 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2175 | |
2176 | /* | |
2177 | * Someone might have exchanged the framebuffer while we dropped locks | |
2178 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2179 | * core does for us. | |
2180 | */ | |
2181 | plane->old_fb = plane->fb; | |
2182 | ||
2183 | goto retry; | |
2184 | } | |
2185 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
2186 | ||
bbb1e524 RC |
2187 | /* just used from fb-helper and atomic-helper: */ |
2188 | int __drm_atomic_helper_disable_plane(struct drm_plane *plane, | |
2189 | struct drm_plane_state *plane_state) | |
2190 | { | |
2191 | int ret; | |
2192 | ||
2193 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
2194 | if (ret != 0) | |
2195 | return ret; | |
2196 | ||
2197 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
2198 | plane_state->crtc_x = 0; | |
2199 | plane_state->crtc_y = 0; | |
bbb1e524 | 2200 | plane_state->crtc_w = 0; |
02e6f379 | 2201 | plane_state->crtc_h = 0; |
bbb1e524 RC |
2202 | plane_state->src_x = 0; |
2203 | plane_state->src_y = 0; | |
bbb1e524 | 2204 | plane_state->src_w = 0; |
02e6f379 | 2205 | plane_state->src_h = 0; |
bbb1e524 | 2206 | |
bbb1e524 RC |
2207 | return 0; |
2208 | } | |
2209 | ||
042652ed DV |
2210 | static int update_output_state(struct drm_atomic_state *state, |
2211 | struct drm_mode_set *set) | |
2212 | { | |
2213 | struct drm_device *dev = set->crtc->dev; | |
df63b999 ACO |
2214 | struct drm_crtc *crtc; |
2215 | struct drm_crtc_state *crtc_state; | |
2216 | struct drm_connector *connector; | |
042652ed | 2217 | struct drm_connector_state *conn_state; |
6ab520a2 | 2218 | int ret, i; |
042652ed DV |
2219 | |
2220 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
2221 | state->acquire_ctx); | |
2222 | if (ret) | |
2223 | return ret; | |
2224 | ||
6ab520a2 ML |
2225 | /* First disable all connectors on the target crtc. */ |
2226 | ret = drm_atomic_add_affected_connectors(state, set->crtc); | |
2227 | if (ret) | |
2228 | return ret; | |
042652ed | 2229 | |
df63b999 | 2230 | for_each_connector_in_state(state, connector, conn_state, i) { |
042652ed DV |
2231 | if (conn_state->crtc == set->crtc) { |
2232 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
2233 | NULL); | |
2234 | if (ret) | |
2235 | return ret; | |
2236 | } | |
6ab520a2 | 2237 | } |
042652ed | 2238 | |
6ab520a2 ML |
2239 | /* Then set all connectors from set->connectors on the target crtc */ |
2240 | for (i = 0; i < set->num_connectors; i++) { | |
2241 | conn_state = drm_atomic_get_connector_state(state, | |
2242 | set->connectors[i]); | |
2243 | if (IS_ERR(conn_state)) | |
2244 | return PTR_ERR(conn_state); | |
2245 | ||
2246 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
2247 | set->crtc); | |
2248 | if (ret) | |
2249 | return ret; | |
042652ed DV |
2250 | } |
2251 | ||
df63b999 | 2252 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
2253 | /* Don't update ->enable for the CRTC in the set_config request, |
2254 | * since a mismatch would indicate a bug in the upper layers. | |
2255 | * The actual modeset code later on will catch any | |
2256 | * inconsistencies here. */ | |
2257 | if (crtc == set->crtc) | |
2258 | continue; | |
2259 | ||
14de6c44 | 2260 | if (!crtc_state->connector_mask) { |
c30f55a7 LP |
2261 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, |
2262 | NULL); | |
2263 | if (ret < 0) | |
2264 | return ret; | |
2265 | ||
9b5edbf7 | 2266 | crtc_state->active = false; |
c30f55a7 | 2267 | } |
042652ed DV |
2268 | } |
2269 | ||
2270 | return 0; | |
2271 | } | |
2272 | ||
2273 | /** | |
2274 | * drm_atomic_helper_set_config - set a new config from userspace | |
2275 | * @set: mode set configuration | |
2276 | * | |
2277 | * Provides a default crtc set_config handler using the atomic driver interface. | |
2278 | * | |
2279 | * Returns: | |
2280 | * Returns 0 on success, negative errno numbers on failure. | |
2281 | */ | |
2282 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
2283 | { | |
2284 | struct drm_atomic_state *state; | |
2285 | struct drm_crtc *crtc = set->crtc; | |
042652ed DV |
2286 | int ret = 0; |
2287 | ||
2288 | state = drm_atomic_state_alloc(crtc->dev); | |
2289 | if (!state) | |
2290 | return -ENOMEM; | |
2291 | ||
40616a26 | 2292 | state->legacy_set_config = true; |
042652ed DV |
2293 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); |
2294 | retry: | |
bbb1e524 RC |
2295 | ret = __drm_atomic_helper_set_config(set, state); |
2296 | if (ret != 0) | |
042652ed | 2297 | goto fail; |
042652ed | 2298 | |
bbb1e524 | 2299 | ret = drm_atomic_commit(state); |
bbb1e524 RC |
2300 | fail: |
2301 | if (ret == -EDEADLK) | |
2302 | goto backoff; | |
2303 | ||
0853695c | 2304 | drm_atomic_state_put(state); |
bbb1e524 | 2305 | return ret; |
0853695c | 2306 | |
bbb1e524 RC |
2307 | backoff: |
2308 | drm_atomic_state_clear(state); | |
2309 | drm_atomic_legacy_backoff(state); | |
2310 | ||
2311 | /* | |
2312 | * Someone might have exchanged the framebuffer while we dropped locks | |
2313 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2314 | * core does for us. | |
2315 | */ | |
2316 | crtc->primary->old_fb = crtc->primary->fb; | |
2317 | ||
2318 | goto retry; | |
2319 | } | |
2320 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
2321 | ||
2322 | /* just used from fb-helper and atomic-helper: */ | |
2323 | int __drm_atomic_helper_set_config(struct drm_mode_set *set, | |
2324 | struct drm_atomic_state *state) | |
2325 | { | |
2326 | struct drm_crtc_state *crtc_state; | |
2327 | struct drm_plane_state *primary_state; | |
2328 | struct drm_crtc *crtc = set->crtc; | |
83926117 | 2329 | int hdisplay, vdisplay; |
bbb1e524 RC |
2330 | int ret; |
2331 | ||
2332 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2333 | if (IS_ERR(crtc_state)) | |
2334 | return PTR_ERR(crtc_state); | |
2335 | ||
2336 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); | |
2337 | if (IS_ERR(primary_state)) | |
2338 | return PTR_ERR(primary_state); | |
e5b5341c | 2339 | |
042652ed DV |
2340 | if (!set->mode) { |
2341 | WARN_ON(set->fb); | |
2342 | WARN_ON(set->num_connectors); | |
2343 | ||
819364da DS |
2344 | ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); |
2345 | if (ret != 0) | |
bbb1e524 | 2346 | return ret; |
819364da | 2347 | |
eab3bbef | 2348 | crtc_state->active = false; |
e5b5341c | 2349 | |
07cc0ef6 | 2350 | ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
e5b5341c | 2351 | if (ret != 0) |
bbb1e524 | 2352 | return ret; |
e5b5341c RC |
2353 | |
2354 | drm_atomic_set_fb_for_plane(primary_state, NULL); | |
2355 | ||
042652ed DV |
2356 | goto commit; |
2357 | } | |
2358 | ||
2359 | WARN_ON(!set->fb); | |
2360 | WARN_ON(!set->num_connectors); | |
2361 | ||
819364da DS |
2362 | ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); |
2363 | if (ret != 0) | |
bbb1e524 | 2364 | return ret; |
819364da | 2365 | |
eab3bbef | 2366 | crtc_state->active = true; |
042652ed | 2367 | |
07cc0ef6 | 2368 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
042652ed | 2369 | if (ret != 0) |
bbb1e524 RC |
2370 | return ret; |
2371 | ||
196cd5d3 | 2372 | drm_mode_get_hv_timing(set->mode, &hdisplay, &vdisplay); |
83926117 | 2373 | |
321ebf04 | 2374 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
042652ed DV |
2375 | primary_state->crtc_x = 0; |
2376 | primary_state->crtc_y = 0; | |
83926117 | 2377 | primary_state->crtc_w = hdisplay; |
02e6f379 | 2378 | primary_state->crtc_h = vdisplay; |
042652ed DV |
2379 | primary_state->src_x = set->x << 16; |
2380 | primary_state->src_y = set->y << 16; | |
bd2ef25d | 2381 | if (drm_rotation_90_or_270(primary_state->rotation)) { |
83926117 | 2382 | primary_state->src_w = vdisplay << 16; |
02e6f379 | 2383 | primary_state->src_h = hdisplay << 16; |
41121248 | 2384 | } else { |
83926117 | 2385 | primary_state->src_w = hdisplay << 16; |
02e6f379 | 2386 | primary_state->src_h = vdisplay << 16; |
41121248 | 2387 | } |
042652ed DV |
2388 | |
2389 | commit: | |
2390 | ret = update_output_state(state, set); | |
2391 | if (ret) | |
bbb1e524 | 2392 | return ret; |
042652ed | 2393 | |
042652ed | 2394 | return 0; |
042652ed | 2395 | } |
042652ed | 2396 | |
14942760 TR |
2397 | /** |
2398 | * drm_atomic_helper_disable_all - disable all currently active outputs | |
2399 | * @dev: DRM device | |
2400 | * @ctx: lock acquisition context | |
2401 | * | |
2402 | * Loops through all connectors, finding those that aren't turned off and then | |
2403 | * turns them off by setting their DPMS mode to OFF and deactivating the CRTC | |
2404 | * that they are connected to. | |
2405 | * | |
2406 | * This is used for example in suspend/resume to disable all currently active | |
2407 | * functions when suspending. | |
2408 | * | |
2409 | * Note that if callers haven't already acquired all modeset locks this might | |
2410 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
2411 | * | |
2412 | * Returns: | |
2413 | * 0 on success or a negative error code on failure. | |
2414 | * | |
2415 | * See also: | |
2416 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
2417 | */ | |
2418 | int drm_atomic_helper_disable_all(struct drm_device *dev, | |
2419 | struct drm_modeset_acquire_ctx *ctx) | |
2420 | { | |
2421 | struct drm_atomic_state *state; | |
2422 | struct drm_connector *conn; | |
c36a3254 | 2423 | struct drm_connector_list_iter conn_iter; |
14942760 TR |
2424 | int err; |
2425 | ||
2426 | state = drm_atomic_state_alloc(dev); | |
2427 | if (!state) | |
2428 | return -ENOMEM; | |
2429 | ||
2430 | state->acquire_ctx = ctx; | |
2431 | ||
c36a3254 DV |
2432 | drm_connector_list_iter_get(dev, &conn_iter); |
2433 | drm_for_each_connector_iter(conn, &conn_iter) { | |
14942760 TR |
2434 | struct drm_crtc *crtc = conn->state->crtc; |
2435 | struct drm_crtc_state *crtc_state; | |
2436 | ||
2437 | if (!crtc || conn->dpms != DRM_MODE_DPMS_ON) | |
2438 | continue; | |
2439 | ||
2440 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2441 | if (IS_ERR(crtc_state)) { | |
2442 | err = PTR_ERR(crtc_state); | |
2443 | goto free; | |
2444 | } | |
2445 | ||
2446 | crtc_state->active = false; | |
2447 | } | |
2448 | ||
2449 | err = drm_atomic_commit(state); | |
14942760 | 2450 | free: |
c36a3254 | 2451 | drm_connector_list_iter_put(&conn_iter); |
0853695c | 2452 | drm_atomic_state_put(state); |
14942760 TR |
2453 | return err; |
2454 | } | |
2455 | EXPORT_SYMBOL(drm_atomic_helper_disable_all); | |
2456 | ||
2457 | /** | |
2458 | * drm_atomic_helper_suspend - subsystem-level suspend helper | |
2459 | * @dev: DRM device | |
2460 | * | |
2461 | * Duplicates the current atomic state, disables all active outputs and then | |
2462 | * returns a pointer to the original atomic state to the caller. Drivers can | |
2463 | * pass this pointer to the drm_atomic_helper_resume() helper upon resume to | |
2464 | * restore the output configuration that was active at the time the system | |
2465 | * entered suspend. | |
2466 | * | |
2467 | * Note that it is potentially unsafe to use this. The atomic state object | |
2468 | * returned by this function is assumed to be persistent. Drivers must ensure | |
2469 | * that this holds true. Before calling this function, drivers must make sure | |
2470 | * to suspend fbdev emulation so that nothing can be using the device. | |
2471 | * | |
2472 | * Returns: | |
2473 | * A pointer to a copy of the state before suspend on success or an ERR_PTR()- | |
2474 | * encoded error code on failure. Drivers should store the returned atomic | |
2475 | * state object and pass it to the drm_atomic_helper_resume() helper upon | |
2476 | * resume. | |
2477 | * | |
2478 | * See also: | |
2479 | * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), | |
2480 | * drm_atomic_helper_resume() | |
2481 | */ | |
2482 | struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) | |
2483 | { | |
2484 | struct drm_modeset_acquire_ctx ctx; | |
2485 | struct drm_atomic_state *state; | |
2486 | int err; | |
2487 | ||
2488 | drm_modeset_acquire_init(&ctx, 0); | |
2489 | ||
2490 | retry: | |
2491 | err = drm_modeset_lock_all_ctx(dev, &ctx); | |
2492 | if (err < 0) { | |
2493 | state = ERR_PTR(err); | |
2494 | goto unlock; | |
2495 | } | |
2496 | ||
2497 | state = drm_atomic_helper_duplicate_state(dev, &ctx); | |
2498 | if (IS_ERR(state)) | |
2499 | goto unlock; | |
2500 | ||
2501 | err = drm_atomic_helper_disable_all(dev, &ctx); | |
2502 | if (err < 0) { | |
0853695c | 2503 | drm_atomic_state_put(state); |
14942760 TR |
2504 | state = ERR_PTR(err); |
2505 | goto unlock; | |
2506 | } | |
2507 | ||
2508 | unlock: | |
2509 | if (PTR_ERR(state) == -EDEADLK) { | |
2510 | drm_modeset_backoff(&ctx); | |
2511 | goto retry; | |
2512 | } | |
2513 | ||
2514 | drm_modeset_drop_locks(&ctx); | |
2515 | drm_modeset_acquire_fini(&ctx); | |
2516 | return state; | |
2517 | } | |
2518 | EXPORT_SYMBOL(drm_atomic_helper_suspend); | |
2519 | ||
2520 | /** | |
2521 | * drm_atomic_helper_resume - subsystem-level resume helper | |
2522 | * @dev: DRM device | |
2523 | * @state: atomic state to resume to | |
2524 | * | |
2525 | * Calls drm_mode_config_reset() to synchronize hardware and software states, | |
2526 | * grabs all modeset locks and commits the atomic state object. This can be | |
2527 | * used in conjunction with the drm_atomic_helper_suspend() helper to | |
2528 | * implement suspend/resume for drivers that support atomic mode-setting. | |
2529 | * | |
2530 | * Returns: | |
2531 | * 0 on success or a negative error code on failure. | |
2532 | * | |
2533 | * See also: | |
2534 | * drm_atomic_helper_suspend() | |
2535 | */ | |
2536 | int drm_atomic_helper_resume(struct drm_device *dev, | |
2537 | struct drm_atomic_state *state) | |
2538 | { | |
2539 | struct drm_mode_config *config = &dev->mode_config; | |
2540 | int err; | |
2541 | ||
2542 | drm_mode_config_reset(dev); | |
2543 | drm_modeset_lock_all(dev); | |
2544 | state->acquire_ctx = config->acquire_ctx; | |
2545 | err = drm_atomic_commit(state); | |
2546 | drm_modeset_unlock_all(dev); | |
2547 | ||
2548 | return err; | |
2549 | } | |
2550 | EXPORT_SYMBOL(drm_atomic_helper_resume); | |
2551 | ||
042652ed | 2552 | /** |
7f50002f | 2553 | * drm_atomic_helper_crtc_set_property - helper for crtc properties |
042652ed DV |
2554 | * @crtc: DRM crtc |
2555 | * @property: DRM property | |
2556 | * @val: value of property | |
2557 | * | |
7f50002f LP |
2558 | * Provides a default crtc set_property handler using the atomic driver |
2559 | * interface. | |
042652ed DV |
2560 | * |
2561 | * RETURNS: | |
2562 | * Zero on success, error code on failure | |
2563 | */ | |
2564 | int | |
2565 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
2566 | struct drm_property *property, | |
2567 | uint64_t val) | |
2568 | { | |
2569 | struct drm_atomic_state *state; | |
2570 | struct drm_crtc_state *crtc_state; | |
2571 | int ret = 0; | |
2572 | ||
2573 | state = drm_atomic_state_alloc(crtc->dev); | |
2574 | if (!state) | |
2575 | return -ENOMEM; | |
2576 | ||
2577 | /* ->set_property is always called with all locks held. */ | |
2578 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
2579 | retry: | |
2580 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2581 | if (IS_ERR(crtc_state)) { | |
2582 | ret = PTR_ERR(crtc_state); | |
2583 | goto fail; | |
2584 | } | |
2585 | ||
40ecc694 RC |
2586 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
2587 | property, val); | |
042652ed DV |
2588 | if (ret) |
2589 | goto fail; | |
2590 | ||
2591 | ret = drm_atomic_commit(state); | |
042652ed DV |
2592 | fail: |
2593 | if (ret == -EDEADLK) | |
2594 | goto backoff; | |
2595 | ||
0853695c | 2596 | drm_atomic_state_put(state); |
042652ed | 2597 | return ret; |
0853695c | 2598 | |
042652ed | 2599 | backoff: |
042652ed | 2600 | drm_atomic_state_clear(state); |
6f75cea6 | 2601 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2602 | |
2603 | goto retry; | |
2604 | } | |
2605 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
2606 | ||
2607 | /** | |
7f50002f | 2608 | * drm_atomic_helper_plane_set_property - helper for plane properties |
042652ed DV |
2609 | * @plane: DRM plane |
2610 | * @property: DRM property | |
2611 | * @val: value of property | |
2612 | * | |
7f50002f LP |
2613 | * Provides a default plane set_property handler using the atomic driver |
2614 | * interface. | |
042652ed DV |
2615 | * |
2616 | * RETURNS: | |
2617 | * Zero on success, error code on failure | |
2618 | */ | |
2619 | int | |
2620 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
2621 | struct drm_property *property, | |
2622 | uint64_t val) | |
2623 | { | |
2624 | struct drm_atomic_state *state; | |
2625 | struct drm_plane_state *plane_state; | |
2626 | int ret = 0; | |
2627 | ||
2628 | state = drm_atomic_state_alloc(plane->dev); | |
2629 | if (!state) | |
2630 | return -ENOMEM; | |
2631 | ||
2632 | /* ->set_property is always called with all locks held. */ | |
2633 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
2634 | retry: | |
2635 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2636 | if (IS_ERR(plane_state)) { | |
2637 | ret = PTR_ERR(plane_state); | |
2638 | goto fail; | |
2639 | } | |
2640 | ||
40ecc694 RC |
2641 | ret = drm_atomic_plane_set_property(plane, plane_state, |
2642 | property, val); | |
042652ed DV |
2643 | if (ret) |
2644 | goto fail; | |
2645 | ||
2646 | ret = drm_atomic_commit(state); | |
042652ed DV |
2647 | fail: |
2648 | if (ret == -EDEADLK) | |
2649 | goto backoff; | |
2650 | ||
0853695c | 2651 | drm_atomic_state_put(state); |
042652ed | 2652 | return ret; |
0853695c | 2653 | |
042652ed | 2654 | backoff: |
042652ed | 2655 | drm_atomic_state_clear(state); |
6f75cea6 | 2656 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2657 | |
2658 | goto retry; | |
2659 | } | |
2660 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
2661 | ||
2662 | /** | |
7f50002f | 2663 | * drm_atomic_helper_connector_set_property - helper for connector properties |
042652ed DV |
2664 | * @connector: DRM connector |
2665 | * @property: DRM property | |
2666 | * @val: value of property | |
2667 | * | |
7f50002f LP |
2668 | * Provides a default connector set_property handler using the atomic driver |
2669 | * interface. | |
042652ed DV |
2670 | * |
2671 | * RETURNS: | |
2672 | * Zero on success, error code on failure | |
2673 | */ | |
2674 | int | |
2675 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
2676 | struct drm_property *property, | |
2677 | uint64_t val) | |
2678 | { | |
2679 | struct drm_atomic_state *state; | |
2680 | struct drm_connector_state *connector_state; | |
2681 | int ret = 0; | |
2682 | ||
2683 | state = drm_atomic_state_alloc(connector->dev); | |
2684 | if (!state) | |
2685 | return -ENOMEM; | |
2686 | ||
2687 | /* ->set_property is always called with all locks held. */ | |
2688 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
2689 | retry: | |
2690 | connector_state = drm_atomic_get_connector_state(state, connector); | |
2691 | if (IS_ERR(connector_state)) { | |
2692 | ret = PTR_ERR(connector_state); | |
2693 | goto fail; | |
2694 | } | |
2695 | ||
40ecc694 RC |
2696 | ret = drm_atomic_connector_set_property(connector, connector_state, |
2697 | property, val); | |
042652ed DV |
2698 | if (ret) |
2699 | goto fail; | |
2700 | ||
2701 | ret = drm_atomic_commit(state); | |
042652ed DV |
2702 | fail: |
2703 | if (ret == -EDEADLK) | |
2704 | goto backoff; | |
2705 | ||
0853695c | 2706 | drm_atomic_state_put(state); |
042652ed | 2707 | return ret; |
0853695c | 2708 | |
042652ed | 2709 | backoff: |
042652ed | 2710 | drm_atomic_state_clear(state); |
6f75cea6 | 2711 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2712 | |
2713 | goto retry; | |
2714 | } | |
2715 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 | 2716 | |
f869a6ec AG |
2717 | static int page_flip_common( |
2718 | struct drm_atomic_state *state, | |
2719 | struct drm_crtc *crtc, | |
2720 | struct drm_framebuffer *fb, | |
2721 | struct drm_pending_vblank_event *event) | |
2722 | { | |
2723 | struct drm_plane *plane = crtc->primary; | |
2724 | struct drm_plane_state *plane_state; | |
2725 | struct drm_crtc_state *crtc_state; | |
2726 | int ret = 0; | |
2727 | ||
2728 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2729 | if (IS_ERR(crtc_state)) | |
2730 | return PTR_ERR(crtc_state); | |
2731 | ||
2732 | crtc_state->event = event; | |
2733 | ||
2734 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2735 | if (IS_ERR(plane_state)) | |
2736 | return PTR_ERR(plane_state); | |
2737 | ||
2738 | ||
2739 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); | |
2740 | if (ret != 0) | |
2741 | return ret; | |
2742 | drm_atomic_set_fb_for_plane(plane_state, fb); | |
2743 | ||
2744 | /* Make sure we don't accidentally do a full modeset. */ | |
2745 | state->allow_modeset = false; | |
2746 | if (!crtc_state->active) { | |
2747 | DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n", | |
2748 | crtc->base.id); | |
2749 | return -EINVAL; | |
2750 | } | |
2751 | ||
2752 | return ret; | |
2753 | } | |
2754 | ||
8bc0f312 DV |
2755 | /** |
2756 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
2757 | * @crtc: DRM crtc | |
2758 | * @fb: DRM framebuffer | |
2759 | * @event: optional DRM event to signal upon completion | |
2760 | * @flags: flip flags for non-vblank sync'ed updates | |
2761 | * | |
f869a6ec AG |
2762 | * Provides a default &drm_crtc_funcs.page_flip implementation |
2763 | * using the atomic driver interface. | |
8bc0f312 DV |
2764 | * |
2765 | * Note that for now so called async page flips (i.e. updates which are not | |
2766 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
2767 | * no provisions for this yet. | |
2768 | * | |
2769 | * Returns: | |
2770 | * Returns 0 on success, negative errno numbers on failure. | |
f869a6ec AG |
2771 | * |
2772 | * See also: | |
2773 | * drm_atomic_helper_page_flip_target() | |
8bc0f312 DV |
2774 | */ |
2775 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
2776 | struct drm_framebuffer *fb, | |
2777 | struct drm_pending_vblank_event *event, | |
2778 | uint32_t flags) | |
2779 | { | |
2780 | struct drm_plane *plane = crtc->primary; | |
2781 | struct drm_atomic_state *state; | |
8bc0f312 DV |
2782 | int ret = 0; |
2783 | ||
2784 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
2785 | return -EINVAL; | |
2786 | ||
2787 | state = drm_atomic_state_alloc(plane->dev); | |
2788 | if (!state) | |
2789 | return -ENOMEM; | |
2790 | ||
2791 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
f869a6ec | 2792 | |
8bc0f312 | 2793 | retry: |
f869a6ec AG |
2794 | ret = page_flip_common(state, crtc, fb, event); |
2795 | if (ret != 0) | |
8bc0f312 | 2796 | goto fail; |
8bc0f312 | 2797 | |
f869a6ec | 2798 | ret = drm_atomic_nonblocking_commit(state); |
8bc0f312 | 2799 | |
f869a6ec AG |
2800 | fail: |
2801 | if (ret == -EDEADLK) | |
2802 | goto backoff; | |
2803 | ||
2804 | drm_atomic_state_put(state); | |
2805 | return ret; | |
2806 | ||
2807 | backoff: | |
2808 | drm_atomic_state_clear(state); | |
2809 | drm_atomic_legacy_backoff(state); | |
2810 | ||
2811 | /* | |
2812 | * Someone might have exchanged the framebuffer while we dropped locks | |
2813 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2814 | * core does for us. | |
2815 | */ | |
2816 | plane->old_fb = plane->fb; | |
2817 | ||
2818 | goto retry; | |
2819 | } | |
2820 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
2821 | ||
2822 | /** | |
2823 | * drm_atomic_helper_page_flip_target - do page flip on target vblank period. | |
2824 | * @crtc: DRM crtc | |
2825 | * @fb: DRM framebuffer | |
2826 | * @event: optional DRM event to signal upon completion | |
2827 | * @flags: flip flags for non-vblank sync'ed updates | |
2828 | * @target: specifying the target vblank period when the flip to take effect | |
2829 | * | |
2830 | * Provides a default &drm_crtc_funcs.page_flip_target implementation. | |
2831 | * Similar to drm_atomic_helper_page_flip() with extra parameter to specify | |
2832 | * target vblank period to flip. | |
2833 | * | |
2834 | * Returns: | |
2835 | * Returns 0 on success, negative errno numbers on failure. | |
2836 | */ | |
2837 | int drm_atomic_helper_page_flip_target( | |
2838 | struct drm_crtc *crtc, | |
2839 | struct drm_framebuffer *fb, | |
2840 | struct drm_pending_vblank_event *event, | |
2841 | uint32_t flags, | |
2842 | uint32_t target) | |
2843 | { | |
2844 | struct drm_plane *plane = crtc->primary; | |
2845 | struct drm_atomic_state *state; | |
2846 | struct drm_crtc_state *crtc_state; | |
2847 | int ret = 0; | |
2848 | ||
2849 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
2850 | return -EINVAL; | |
2851 | ||
2852 | state = drm_atomic_state_alloc(plane->dev); | |
2853 | if (!state) | |
2854 | return -ENOMEM; | |
2855 | ||
2856 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2857 | ||
2858 | retry: | |
2859 | ret = page_flip_common(state, crtc, fb, event); | |
8bc0f312 DV |
2860 | if (ret != 0) |
2861 | goto fail; | |
8bc0f312 | 2862 | |
f869a6ec AG |
2863 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); |
2864 | if (WARN_ON(!crtc_state)) { | |
4cba6850 DV |
2865 | ret = -EINVAL; |
2866 | goto fail; | |
2867 | } | |
f869a6ec | 2868 | crtc_state->target_vblank = target; |
4cba6850 | 2869 | |
b837ba0a | 2870 | ret = drm_atomic_nonblocking_commit(state); |
f869a6ec | 2871 | |
8bc0f312 DV |
2872 | fail: |
2873 | if (ret == -EDEADLK) | |
2874 | goto backoff; | |
2875 | ||
0853695c | 2876 | drm_atomic_state_put(state); |
8bc0f312 | 2877 | return ret; |
0853695c | 2878 | |
8bc0f312 | 2879 | backoff: |
8bc0f312 | 2880 | drm_atomic_state_clear(state); |
6f75cea6 | 2881 | drm_atomic_legacy_backoff(state); |
8bc0f312 DV |
2882 | |
2883 | /* | |
2884 | * Someone might have exchanged the framebuffer while we dropped locks | |
2885 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2886 | * core does for us. | |
2887 | */ | |
2888 | plane->old_fb = plane->fb; | |
2889 | ||
2890 | goto retry; | |
2891 | } | |
f869a6ec | 2892 | EXPORT_SYMBOL(drm_atomic_helper_page_flip_target); |
d461701c | 2893 | |
b486e0e6 DV |
2894 | /** |
2895 | * drm_atomic_helper_connector_dpms() - connector dpms helper implementation | |
2896 | * @connector: affected connector | |
2897 | * @mode: DPMS mode | |
2898 | * | |
2899 | * This is the main helper function provided by the atomic helper framework for | |
2900 | * implementing the legacy DPMS connector interface. It computes the new desired | |
6806cdf9 DV |
2901 | * &drm_crtc_state.active state for the corresponding CRTC (if the connector is |
2902 | * enabled) and updates it. | |
9a69a9ac ML |
2903 | * |
2904 | * Returns: | |
2905 | * Returns 0 on success, negative errno numbers on failure. | |
b486e0e6 | 2906 | */ |
9a69a9ac ML |
2907 | int drm_atomic_helper_connector_dpms(struct drm_connector *connector, |
2908 | int mode) | |
b486e0e6 DV |
2909 | { |
2910 | struct drm_mode_config *config = &connector->dev->mode_config; | |
2911 | struct drm_atomic_state *state; | |
2912 | struct drm_crtc_state *crtc_state; | |
2913 | struct drm_crtc *crtc; | |
2914 | struct drm_connector *tmp_connector; | |
c36a3254 | 2915 | struct drm_connector_list_iter conn_iter; |
b486e0e6 DV |
2916 | int ret; |
2917 | bool active = false; | |
9a69a9ac | 2918 | int old_mode = connector->dpms; |
b486e0e6 DV |
2919 | |
2920 | if (mode != DRM_MODE_DPMS_ON) | |
2921 | mode = DRM_MODE_DPMS_OFF; | |
2922 | ||
2923 | connector->dpms = mode; | |
2924 | crtc = connector->state->crtc; | |
2925 | ||
2926 | if (!crtc) | |
9a69a9ac | 2927 | return 0; |
b486e0e6 | 2928 | |
b486e0e6 DV |
2929 | state = drm_atomic_state_alloc(connector->dev); |
2930 | if (!state) | |
9a69a9ac | 2931 | return -ENOMEM; |
b486e0e6 DV |
2932 | |
2933 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2934 | retry: | |
2935 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
9a69a9ac ML |
2936 | if (IS_ERR(crtc_state)) { |
2937 | ret = PTR_ERR(crtc_state); | |
2938 | goto fail; | |
2939 | } | |
b486e0e6 DV |
2940 | |
2941 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
2942 | ||
c36a3254 DV |
2943 | drm_connector_list_iter_get(connector->dev, &conn_iter); |
2944 | drm_for_each_connector_iter(tmp_connector, &conn_iter) { | |
0388df05 | 2945 | if (tmp_connector->state->crtc != crtc) |
b486e0e6 DV |
2946 | continue; |
2947 | ||
0388df05 | 2948 | if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { |
b486e0e6 DV |
2949 | active = true; |
2950 | break; | |
2951 | } | |
2952 | } | |
c36a3254 | 2953 | drm_connector_list_iter_put(&conn_iter); |
b486e0e6 DV |
2954 | crtc_state->active = active; |
2955 | ||
2956 | ret = drm_atomic_commit(state); | |
b486e0e6 DV |
2957 | fail: |
2958 | if (ret == -EDEADLK) | |
2959 | goto backoff; | |
8f5040e4 ML |
2960 | if (ret != 0) |
2961 | connector->dpms = old_mode; | |
0853695c | 2962 | drm_atomic_state_put(state); |
9a69a9ac | 2963 | return ret; |
0853695c | 2964 | |
b486e0e6 DV |
2965 | backoff: |
2966 | drm_atomic_state_clear(state); | |
2967 | drm_atomic_legacy_backoff(state); | |
2968 | ||
2969 | goto retry; | |
2970 | } | |
2971 | EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); | |
2972 | ||
9ecb5498 | 2973 | /** |
6806cdf9 DV |
2974 | * drm_atomic_helper_best_encoder - Helper for |
2975 | * &drm_connector_helper_funcs.best_encoder callback | |
9ecb5498 NT |
2976 | * @connector: Connector control structure |
2977 | * | |
6806cdf9 | 2978 | * This is a &drm_connector_helper_funcs.best_encoder callback helper for |
9ecb5498 NT |
2979 | * connectors that support exactly 1 encoder, statically determined at driver |
2980 | * init time. | |
2981 | */ | |
2982 | struct drm_encoder * | |
2983 | drm_atomic_helper_best_encoder(struct drm_connector *connector) | |
2984 | { | |
2985 | WARN_ON(connector->encoder_ids[1]); | |
2986 | return drm_encoder_find(connector->dev, connector->encoder_ids[0]); | |
2987 | } | |
2988 | EXPORT_SYMBOL(drm_atomic_helper_best_encoder); | |
2989 | ||
3150c7d0 DV |
2990 | /** |
2991 | * DOC: atomic state reset and initialization | |
2992 | * | |
2993 | * Both the drm core and the atomic helpers assume that there is always the full | |
2994 | * and correct atomic software state for all connectors, CRTCs and planes | |
2995 | * available. Which is a bit a problem on driver load and also after system | |
2996 | * suspend. One way to solve this is to have a hardware state read-out | |
2997 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
2998 | * driver). | |
2999 | * | |
3000 | * The simpler solution is to just reset the software state to everything off, | |
3001 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
3002 | * the atomic helpers provide default reset implementations for all hooks. | |
7f8ee3e5 DV |
3003 | * |
3004 | * On the upside the precise state tracking of atomic simplifies system suspend | |
3005 | * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe | |
3006 | * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume(). | |
3007 | * For other drivers the building blocks are split out, see the documentation | |
3008 | * for these functions. | |
3150c7d0 DV |
3009 | */ |
3010 | ||
d461701c | 3011 | /** |
6806cdf9 | 3012 | * drm_atomic_helper_crtc_reset - default &drm_crtc_funcs.reset hook for CRTCs |
d461701c DV |
3013 | * @crtc: drm CRTC |
3014 | * | |
3015 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
3016 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
3017 | */ | |
3018 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
3019 | { | |
b0b5511b | 3020 | if (crtc->state) |
ec2dc6a0 | 3021 | __drm_atomic_helper_crtc_destroy_state(crtc->state); |
b0b5511b | 3022 | |
d461701c DV |
3023 | kfree(crtc->state); |
3024 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
07cc0ef6 DV |
3025 | |
3026 | if (crtc->state) | |
3027 | crtc->state->crtc = crtc; | |
d461701c DV |
3028 | } |
3029 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
3030 | ||
f5e7840b TR |
3031 | /** |
3032 | * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state | |
3033 | * @crtc: CRTC object | |
3034 | * @state: atomic CRTC state | |
3035 | * | |
3036 | * Copies atomic state from a CRTC's current state and resets inferred values. | |
3037 | * This is useful for drivers that subclass the CRTC state. | |
3038 | */ | |
3039 | void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc, | |
3040 | struct drm_crtc_state *state) | |
3041 | { | |
3042 | memcpy(state, crtc->state, sizeof(*state)); | |
3043 | ||
99cf4a29 DS |
3044 | if (state->mode_blob) |
3045 | drm_property_reference_blob(state->mode_blob); | |
5488dc16 LL |
3046 | if (state->degamma_lut) |
3047 | drm_property_reference_blob(state->degamma_lut); | |
3048 | if (state->ctm) | |
3049 | drm_property_reference_blob(state->ctm); | |
3050 | if (state->gamma_lut) | |
3051 | drm_property_reference_blob(state->gamma_lut); | |
f5e7840b TR |
3052 | state->mode_changed = false; |
3053 | state->active_changed = false; | |
3054 | state->planes_changed = false; | |
fc596660 | 3055 | state->connectors_changed = false; |
5488dc16 | 3056 | state->color_mgmt_changed = false; |
44d1240d | 3057 | state->zpos_changed = false; |
f5e7840b TR |
3058 | state->event = NULL; |
3059 | } | |
3060 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state); | |
3061 | ||
d461701c DV |
3062 | /** |
3063 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
3064 | * @crtc: drm CRTC | |
3065 | * | |
3066 | * Default CRTC state duplicate hook for drivers which don't have their own | |
3067 | * subclassed CRTC state structure. | |
3068 | */ | |
3069 | struct drm_crtc_state * | |
3070 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
3071 | { | |
3072 | struct drm_crtc_state *state; | |
3073 | ||
3074 | if (WARN_ON(!crtc->state)) | |
3075 | return NULL; | |
3076 | ||
f5e7840b TR |
3077 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
3078 | if (state) | |
3079 | __drm_atomic_helper_crtc_duplicate_state(crtc, state); | |
d461701c DV |
3080 | |
3081 | return state; | |
3082 | } | |
3083 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
3084 | ||
f5e7840b TR |
3085 | /** |
3086 | * __drm_atomic_helper_crtc_destroy_state - release CRTC state | |
f5e7840b TR |
3087 | * @state: CRTC state object to release |
3088 | * | |
3089 | * Releases all resources stored in the CRTC state without actually freeing | |
3090 | * the memory of the CRTC state. This is useful for drivers that subclass the | |
3091 | * CRTC state. | |
3092 | */ | |
ec2dc6a0 | 3093 | void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state) |
f5e7840b | 3094 | { |
5f911905 | 3095 | drm_property_unreference_blob(state->mode_blob); |
5488dc16 LL |
3096 | drm_property_unreference_blob(state->degamma_lut); |
3097 | drm_property_unreference_blob(state->ctm); | |
3098 | drm_property_unreference_blob(state->gamma_lut); | |
f5e7840b TR |
3099 | } |
3100 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); | |
3101 | ||
d461701c DV |
3102 | /** |
3103 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
3104 | * @crtc: drm CRTC | |
3105 | * @state: CRTC state object to release | |
3106 | * | |
3107 | * Default CRTC state destroy hook for drivers which don't have their own | |
3108 | * subclassed CRTC state structure. | |
3109 | */ | |
3110 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
3111 | struct drm_crtc_state *state) | |
3112 | { | |
ec2dc6a0 | 3113 | __drm_atomic_helper_crtc_destroy_state(state); |
d461701c DV |
3114 | kfree(state); |
3115 | } | |
3116 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
3117 | ||
3118 | /** | |
6806cdf9 | 3119 | * drm_atomic_helper_plane_reset - default &drm_plane_funcs.reset hook for planes |
d461701c DV |
3120 | * @plane: drm plane |
3121 | * | |
3122 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
3123 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
3124 | */ | |
3125 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
3126 | { | |
b0b5511b | 3127 | if (plane->state) |
2f701695 | 3128 | __drm_atomic_helper_plane_destroy_state(plane->state); |
321ebf04 | 3129 | |
d461701c DV |
3130 | kfree(plane->state); |
3131 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
07cc0ef6 | 3132 | |
25aaa3a1 | 3133 | if (plane->state) { |
07cc0ef6 | 3134 | plane->state->plane = plane; |
31ad61e4 | 3135 | plane->state->rotation = DRM_ROTATE_0; |
25aaa3a1 | 3136 | } |
d461701c DV |
3137 | } |
3138 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
3139 | ||
f5e7840b TR |
3140 | /** |
3141 | * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state | |
3142 | * @plane: plane object | |
3143 | * @state: atomic plane state | |
3144 | * | |
3145 | * Copies atomic state from a plane's current state. This is useful for | |
3146 | * drivers that subclass the plane state. | |
3147 | */ | |
3148 | void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane, | |
3149 | struct drm_plane_state *state) | |
3150 | { | |
3151 | memcpy(state, plane->state, sizeof(*state)); | |
3152 | ||
3153 | if (state->fb) | |
3154 | drm_framebuffer_reference(state->fb); | |
96260142 GP |
3155 | |
3156 | state->fence = NULL; | |
f5e7840b TR |
3157 | } |
3158 | EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state); | |
3159 | ||
d461701c DV |
3160 | /** |
3161 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
3162 | * @plane: drm plane | |
3163 | * | |
3164 | * Default plane state duplicate hook for drivers which don't have their own | |
3165 | * subclassed plane state structure. | |
3166 | */ | |
3167 | struct drm_plane_state * | |
3168 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
3169 | { | |
321ebf04 DV |
3170 | struct drm_plane_state *state; |
3171 | ||
d461701c DV |
3172 | if (WARN_ON(!plane->state)) |
3173 | return NULL; | |
3174 | ||
f5e7840b TR |
3175 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
3176 | if (state) | |
3177 | __drm_atomic_helper_plane_duplicate_state(plane, state); | |
321ebf04 DV |
3178 | |
3179 | return state; | |
d461701c DV |
3180 | } |
3181 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
3182 | ||
f5e7840b TR |
3183 | /** |
3184 | * __drm_atomic_helper_plane_destroy_state - release plane state | |
f5e7840b TR |
3185 | * @state: plane state object to release |
3186 | * | |
3187 | * Releases all resources stored in the plane state without actually freeing | |
3188 | * the memory of the plane state. This is useful for drivers that subclass the | |
3189 | * plane state. | |
3190 | */ | |
2f701695 | 3191 | void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state) |
f5e7840b TR |
3192 | { |
3193 | if (state->fb) | |
3194 | drm_framebuffer_unreference(state->fb); | |
96260142 GP |
3195 | |
3196 | if (state->fence) | |
3197 | dma_fence_put(state->fence); | |
f5e7840b TR |
3198 | } |
3199 | EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state); | |
3200 | ||
d461701c DV |
3201 | /** |
3202 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
3203 | * @plane: drm plane | |
3204 | * @state: plane state object to release | |
3205 | * | |
3206 | * Default plane state destroy hook for drivers which don't have their own | |
3207 | * subclassed plane state structure. | |
3208 | */ | |
3209 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
321ebf04 | 3210 | struct drm_plane_state *state) |
d461701c | 3211 | { |
2f701695 | 3212 | __drm_atomic_helper_plane_destroy_state(state); |
d461701c DV |
3213 | kfree(state); |
3214 | } | |
3215 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
3216 | ||
4cd39917 ML |
3217 | /** |
3218 | * __drm_atomic_helper_connector_reset - reset state on connector | |
3219 | * @connector: drm connector | |
3220 | * @conn_state: connector state to assign | |
3221 | * | |
3222 | * Initializes the newly allocated @conn_state and assigns it to | |
6806cdf9 DV |
3223 | * the &drm_conector->state pointer of @connector, usually required when |
3224 | * initializing the drivers or when called from the &drm_connector_funcs.reset | |
3225 | * hook. | |
4cd39917 ML |
3226 | * |
3227 | * This is useful for drivers that subclass the connector state. | |
3228 | */ | |
3229 | void | |
3230 | __drm_atomic_helper_connector_reset(struct drm_connector *connector, | |
3231 | struct drm_connector_state *conn_state) | |
3232 | { | |
3233 | if (conn_state) | |
3234 | conn_state->connector = connector; | |
3235 | ||
3236 | connector->state = conn_state; | |
3237 | } | |
3238 | EXPORT_SYMBOL(__drm_atomic_helper_connector_reset); | |
3239 | ||
d461701c | 3240 | /** |
6806cdf9 | 3241 | * drm_atomic_helper_connector_reset - default &drm_connector_funcs.reset hook for connectors |
d461701c DV |
3242 | * @connector: drm connector |
3243 | * | |
3244 | * Resets the atomic state for @connector by freeing the state pointer (which | |
3245 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
3246 | * object. | |
3247 | */ | |
3248 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
3249 | { | |
4cd39917 ML |
3250 | struct drm_connector_state *conn_state = |
3251 | kzalloc(sizeof(*conn_state), GFP_KERNEL); | |
07cc0ef6 | 3252 | |
b0b5511b | 3253 | if (connector->state) |
fabd9106 | 3254 | __drm_atomic_helper_connector_destroy_state(connector->state); |
b0b5511b | 3255 | |
4cd39917 ML |
3256 | kfree(connector->state); |
3257 | __drm_atomic_helper_connector_reset(connector, conn_state); | |
d461701c DV |
3258 | } |
3259 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
3260 | ||
f5e7840b TR |
3261 | /** |
3262 | * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state | |
3263 | * @connector: connector object | |
3264 | * @state: atomic connector state | |
3265 | * | |
3266 | * Copies atomic state from a connector's current state. This is useful for | |
3267 | * drivers that subclass the connector state. | |
3268 | */ | |
3269 | void | |
3270 | __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector, | |
3271 | struct drm_connector_state *state) | |
3272 | { | |
3273 | memcpy(state, connector->state, sizeof(*state)); | |
d2307dea DA |
3274 | if (state->crtc) |
3275 | drm_connector_reference(connector); | |
f5e7840b TR |
3276 | } |
3277 | EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state); | |
3278 | ||
d461701c DV |
3279 | /** |
3280 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
3281 | * @connector: drm connector | |
3282 | * | |
3283 | * Default connector state duplicate hook for drivers which don't have their own | |
3284 | * subclassed connector state structure. | |
3285 | */ | |
3286 | struct drm_connector_state * | |
3287 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
3288 | { | |
f5e7840b TR |
3289 | struct drm_connector_state *state; |
3290 | ||
d461701c DV |
3291 | if (WARN_ON(!connector->state)) |
3292 | return NULL; | |
3293 | ||
f5e7840b TR |
3294 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
3295 | if (state) | |
3296 | __drm_atomic_helper_connector_duplicate_state(connector, state); | |
3297 | ||
3298 | return state; | |
d461701c DV |
3299 | } |
3300 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
3301 | ||
397fd77c TR |
3302 | /** |
3303 | * drm_atomic_helper_duplicate_state - duplicate an atomic state object | |
3304 | * @dev: DRM device | |
3305 | * @ctx: lock acquisition context | |
3306 | * | |
3307 | * Makes a copy of the current atomic state by looping over all objects and | |
14942760 TR |
3308 | * duplicating their respective states. This is used for example by suspend/ |
3309 | * resume support code to save the state prior to suspend such that it can | |
3310 | * be restored upon resume. | |
397fd77c TR |
3311 | * |
3312 | * Note that this treats atomic state as persistent between save and restore. | |
3313 | * Drivers must make sure that this is possible and won't result in confusion | |
3314 | * or erroneous behaviour. | |
3315 | * | |
3316 | * Note that if callers haven't already acquired all modeset locks this might | |
3317 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
3318 | * | |
3319 | * Returns: | |
3320 | * A pointer to the copy of the atomic state object on success or an | |
3321 | * ERR_PTR()-encoded error code on failure. | |
14942760 TR |
3322 | * |
3323 | * See also: | |
3324 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
397fd77c TR |
3325 | */ |
3326 | struct drm_atomic_state * | |
3327 | drm_atomic_helper_duplicate_state(struct drm_device *dev, | |
3328 | struct drm_modeset_acquire_ctx *ctx) | |
3329 | { | |
3330 | struct drm_atomic_state *state; | |
3331 | struct drm_connector *conn; | |
c36a3254 | 3332 | struct drm_connector_list_iter conn_iter; |
397fd77c TR |
3333 | struct drm_plane *plane; |
3334 | struct drm_crtc *crtc; | |
3335 | int err = 0; | |
3336 | ||
3337 | state = drm_atomic_state_alloc(dev); | |
3338 | if (!state) | |
3339 | return ERR_PTR(-ENOMEM); | |
3340 | ||
3341 | state->acquire_ctx = ctx; | |
3342 | ||
3343 | drm_for_each_crtc(crtc, dev) { | |
3344 | struct drm_crtc_state *crtc_state; | |
3345 | ||
3346 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3347 | if (IS_ERR(crtc_state)) { | |
3348 | err = PTR_ERR(crtc_state); | |
3349 | goto free; | |
3350 | } | |
3351 | } | |
3352 | ||
3353 | drm_for_each_plane(plane, dev) { | |
3354 | struct drm_plane_state *plane_state; | |
3355 | ||
3356 | plane_state = drm_atomic_get_plane_state(state, plane); | |
3357 | if (IS_ERR(plane_state)) { | |
3358 | err = PTR_ERR(plane_state); | |
3359 | goto free; | |
3360 | } | |
3361 | } | |
3362 | ||
c36a3254 DV |
3363 | drm_connector_list_iter_get(dev, &conn_iter); |
3364 | drm_for_each_connector_iter(conn, &conn_iter) { | |
397fd77c TR |
3365 | struct drm_connector_state *conn_state; |
3366 | ||
3367 | conn_state = drm_atomic_get_connector_state(state, conn); | |
3368 | if (IS_ERR(conn_state)) { | |
3369 | err = PTR_ERR(conn_state); | |
c36a3254 | 3370 | drm_connector_list_iter_put(&conn_iter); |
397fd77c TR |
3371 | goto free; |
3372 | } | |
3373 | } | |
c36a3254 | 3374 | drm_connector_list_iter_put(&conn_iter); |
397fd77c TR |
3375 | |
3376 | /* clear the acquire context so that it isn't accidentally reused */ | |
3377 | state->acquire_ctx = NULL; | |
3378 | ||
3379 | free: | |
3380 | if (err < 0) { | |
0853695c | 3381 | drm_atomic_state_put(state); |
397fd77c TR |
3382 | state = ERR_PTR(err); |
3383 | } | |
3384 | ||
3385 | return state; | |
3386 | } | |
3387 | EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); | |
3388 | ||
f5e7840b TR |
3389 | /** |
3390 | * __drm_atomic_helper_connector_destroy_state - release connector state | |
f5e7840b TR |
3391 | * @state: connector state object to release |
3392 | * | |
3393 | * Releases all resources stored in the connector state without actually | |
3394 | * freeing the memory of the connector state. This is useful for drivers that | |
3395 | * subclass the connector state. | |
3396 | */ | |
3397 | void | |
fabd9106 | 3398 | __drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state) |
f5e7840b | 3399 | { |
d2307dea DA |
3400 | if (state->crtc) |
3401 | drm_connector_unreference(state->connector); | |
f5e7840b TR |
3402 | } |
3403 | EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state); | |
3404 | ||
d461701c DV |
3405 | /** |
3406 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
3407 | * @connector: drm connector | |
3408 | * @state: connector state object to release | |
3409 | * | |
3410 | * Default connector state destroy hook for drivers which don't have their own | |
3411 | * subclassed connector state structure. | |
3412 | */ | |
3413 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
3414 | struct drm_connector_state *state) | |
3415 | { | |
fabd9106 | 3416 | __drm_atomic_helper_connector_destroy_state(state); |
d461701c DV |
3417 | kfree(state); |
3418 | } | |
3419 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); | |
5488dc16 LL |
3420 | |
3421 | /** | |
3422 | * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table | |
3423 | * @crtc: CRTC object | |
3424 | * @red: red correction table | |
3425 | * @green: green correction table | |
3426 | * @blue: green correction table | |
5488dc16 LL |
3427 | * @size: size of the tables |
3428 | * | |
3429 | * Implements support for legacy gamma correction table for drivers | |
3430 | * that support color management through the DEGAMMA_LUT/GAMMA_LUT | |
3431 | * properties. | |
3432 | */ | |
7ea77283 ML |
3433 | int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc, |
3434 | u16 *red, u16 *green, u16 *blue, | |
3435 | uint32_t size) | |
5488dc16 LL |
3436 | { |
3437 | struct drm_device *dev = crtc->dev; | |
3438 | struct drm_mode_config *config = &dev->mode_config; | |
3439 | struct drm_atomic_state *state; | |
3440 | struct drm_crtc_state *crtc_state; | |
3441 | struct drm_property_blob *blob = NULL; | |
3442 | struct drm_color_lut *blob_data; | |
3443 | int i, ret = 0; | |
3444 | ||
3445 | state = drm_atomic_state_alloc(crtc->dev); | |
3446 | if (!state) | |
7ea77283 | 3447 | return -ENOMEM; |
5488dc16 LL |
3448 | |
3449 | blob = drm_property_create_blob(dev, | |
3450 | sizeof(struct drm_color_lut) * size, | |
3451 | NULL); | |
562c5b4d LL |
3452 | if (IS_ERR(blob)) { |
3453 | ret = PTR_ERR(blob); | |
c1f415c9 | 3454 | blob = NULL; |
5488dc16 LL |
3455 | goto fail; |
3456 | } | |
3457 | ||
3458 | /* Prepare GAMMA_LUT with the legacy values. */ | |
3459 | blob_data = (struct drm_color_lut *) blob->data; | |
3460 | for (i = 0; i < size; i++) { | |
3461 | blob_data[i].red = red[i]; | |
3462 | blob_data[i].green = green[i]; | |
3463 | blob_data[i].blue = blue[i]; | |
3464 | } | |
3465 | ||
3466 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
3467 | retry: | |
3468 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3469 | if (IS_ERR(crtc_state)) { | |
3470 | ret = PTR_ERR(crtc_state); | |
3471 | goto fail; | |
3472 | } | |
3473 | ||
3474 | /* Reset DEGAMMA_LUT and CTM properties. */ | |
3475 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3476 | config->degamma_lut_property, 0); | |
3477 | if (ret) | |
3478 | goto fail; | |
3479 | ||
3480 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3481 | config->ctm_property, 0); | |
3482 | if (ret) | |
3483 | goto fail; | |
3484 | ||
3485 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3486 | config->gamma_lut_property, blob->base.id); | |
3487 | if (ret) | |
3488 | goto fail; | |
3489 | ||
3490 | ret = drm_atomic_commit(state); | |
5488dc16 LL |
3491 | fail: |
3492 | if (ret == -EDEADLK) | |
3493 | goto backoff; | |
3494 | ||
0853695c | 3495 | drm_atomic_state_put(state); |
5488dc16 | 3496 | drm_property_unreference_blob(blob); |
7ea77283 | 3497 | return ret; |
0853695c | 3498 | |
5488dc16 LL |
3499 | backoff: |
3500 | drm_atomic_state_clear(state); | |
3501 | drm_atomic_legacy_backoff(state); | |
3502 | ||
3503 | goto retry; | |
3504 | } | |
3505 | EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set); |