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c2fcd274 DV |
1 | /* |
2 | * Copyright (C) 2014 Red Hat | |
3 | * Copyright (C) 2014 Intel Corp. | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a | |
6 | * copy of this software and associated documentation files (the "Software"), | |
7 | * to deal in the Software without restriction, including without limitation | |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | * and/or sell copies of the Software, and to permit persons to whom the | |
10 | * Software is furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
21 | * OTHER DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Rob Clark <robdclark@gmail.com> | |
25 | * Daniel Vetter <daniel.vetter@ffwll.ch> | |
26 | */ | |
27 | ||
28 | #include <drm/drmP.h> | |
29 | #include <drm/drm_atomic.h> | |
30 | #include <drm/drm_plane_helper.h> | |
31 | #include <drm/drm_crtc_helper.h> | |
623369e5 | 32 | #include <drm/drm_atomic_helper.h> |
f54d1867 | 33 | #include <linux/dma-fence.h> |
c2fcd274 | 34 | |
44d1240d MS |
35 | #include "drm_crtc_internal.h" |
36 | ||
3150c7d0 DV |
37 | /** |
38 | * DOC: overview | |
39 | * | |
40 | * This helper library provides implementations of check and commit functions on | |
41 | * top of the CRTC modeset helper callbacks and the plane helper callbacks. It | |
42 | * also provides convenience implementations for the atomic state handling | |
43 | * callbacks for drivers which don't need to subclass the drm core structures to | |
44 | * add their own additional internal state. | |
45 | * | |
46 | * This library also provides default implementations for the check callback in | |
26196f7e DV |
47 | * drm_atomic_helper_check() and for the commit callback with |
48 | * drm_atomic_helper_commit(). But the individual stages and callbacks are | |
49 | * exposed to allow drivers to mix and match and e.g. use the plane helpers only | |
3150c7d0 DV |
50 | * together with a driver private modeset implementation. |
51 | * | |
52 | * This library also provides implementations for all the legacy driver | |
26196f7e DV |
53 | * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(), |
54 | * drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the | |
3150c7d0 DV |
55 | * various functions to implement set_property callbacks. New drivers must not |
56 | * implement these functions themselves but must use the provided helpers. | |
092d01da DV |
57 | * |
58 | * The atomic helper uses the same function table structures as all other | |
59 | * modesetting helpers. See the documentation for struct &drm_crtc_helper_funcs, | |
60 | * struct &drm_encoder_helper_funcs and struct &drm_connector_helper_funcs. It | |
61 | * also shares the struct &drm_plane_helper_funcs function table with the plane | |
62 | * helpers. | |
3150c7d0 | 63 | */ |
c2fcd274 DV |
64 | static void |
65 | drm_atomic_helper_plane_changed(struct drm_atomic_state *state, | |
66 | struct drm_plane_state *plane_state, | |
67 | struct drm_plane *plane) | |
68 | { | |
69 | struct drm_crtc_state *crtc_state; | |
70 | ||
71 | if (plane->state->crtc) { | |
2943ef32 AH |
72 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
73 | plane->state->crtc); | |
c2fcd274 DV |
74 | |
75 | if (WARN_ON(!crtc_state)) | |
76 | return; | |
77 | ||
78 | crtc_state->planes_changed = true; | |
79 | } | |
80 | ||
81 | if (plane_state->crtc) { | |
2943ef32 AH |
82 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
83 | plane_state->crtc); | |
c2fcd274 DV |
84 | |
85 | if (WARN_ON(!crtc_state)) | |
86 | return; | |
87 | ||
88 | crtc_state->planes_changed = true; | |
89 | } | |
90 | } | |
91 | ||
8248b65d ML |
92 | static int handle_conflicting_encoders(struct drm_atomic_state *state, |
93 | bool disable_conflicting_encoders) | |
97ac3204 | 94 | { |
97ac3204 | 95 | struct drm_connector_state *conn_state; |
40616a26 | 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 ML |
460 | * update and adds any additional connectors needed for full modesets and calls |
461 | * down into ->mode_fixup functions of the driver backend. | |
462 | * | |
463 | * crtc_state->mode_changed is set when the input mode is changed. | |
464 | * crtc_state->connectors_changed is set when a connector is added or | |
465 | * removed from the crtc. | |
466 | * crtc_state->active_changed is set when crtc_state->active changes, | |
467 | * which is used for dpms. | |
d807ed1c | 468 | * See also: drm_atomic_crtc_needs_modeset() |
d9b13620 DV |
469 | * |
470 | * IMPORTANT: | |
471 | * | |
d807ed1c | 472 | * Drivers which set ->mode_changed (e.g. in their ->atomic_check hooks if a |
d9b13620 DV |
473 | * plane update can't be done without a full modeset) _must_ call this function |
474 | * afterwards after that change. It is permitted to call this function multiple | |
475 | * times for the same update, e.g. when the ->atomic_check functions depend upon | |
476 | * the adjusted dotclock for fifo space allocation and watermark computation. | |
477 | * | |
c39032a8 | 478 | * RETURNS: |
d9b13620 DV |
479 | * Zero for success or -errno |
480 | */ | |
481 | int | |
934ce1c2 | 482 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
483 | struct drm_atomic_state *state) |
484 | { | |
623369e5 DV |
485 | struct drm_crtc *crtc; |
486 | struct drm_crtc_state *crtc_state; | |
df63b999 ACO |
487 | struct drm_connector *connector; |
488 | struct drm_connector_state *connector_state; | |
623369e5 DV |
489 | int i, ret; |
490 | ||
df63b999 | 491 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 | 492 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { |
fa3ab4c2 VS |
493 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n", |
494 | crtc->base.id, crtc->name); | |
623369e5 DV |
495 | crtc_state->mode_changed = true; |
496 | } | |
497 | ||
498 | if (crtc->state->enable != crtc_state->enable) { | |
fa3ab4c2 VS |
499 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n", |
500 | crtc->base.id, crtc->name); | |
fc596660 ML |
501 | |
502 | /* | |
503 | * For clarity this assignment is done here, but | |
504 | * enable == 0 is only true when there are no | |
505 | * connectors and a NULL mode. | |
506 | * | |
507 | * The other way around is true as well. enable != 0 | |
508 | * iff connectors are attached and a mode is set. | |
509 | */ | |
623369e5 | 510 | crtc_state->mode_changed = true; |
fc596660 | 511 | crtc_state->connectors_changed = true; |
623369e5 DV |
512 | } |
513 | } | |
514 | ||
8248b65d ML |
515 | ret = handle_conflicting_encoders(state, state->legacy_set_config); |
516 | if (ret) | |
517 | return ret; | |
40616a26 | 518 | |
df63b999 | 519 | for_each_connector_in_state(state, connector, connector_state, i) { |
623369e5 | 520 | /* |
d807ed1c BS |
521 | * This only sets crtc->connectors_changed for routing changes, |
522 | * drivers must set crtc->connectors_changed themselves when | |
523 | * connector properties need to be updated. | |
623369e5 | 524 | */ |
9459545b ML |
525 | ret = update_connector_routing(state, connector, |
526 | connector_state); | |
623369e5 DV |
527 | if (ret) |
528 | return ret; | |
529 | } | |
530 | ||
531 | /* | |
532 | * After all the routing has been prepared we need to add in any | |
533 | * connector which is itself unchanged, but who's crtc changes it's | |
534 | * configuration. This must be done before calling mode_fixup in case a | |
535 | * crtc only changed its mode but has the same set of connectors. | |
536 | */ | |
df63b999 | 537 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
14de6c44 ML |
538 | bool has_connectors = |
539 | !!crtc_state->connector_mask; | |
623369e5 | 540 | |
eab3bbef DV |
541 | /* |
542 | * We must set ->active_changed after walking connectors for | |
543 | * otherwise an update that only changes active would result in | |
544 | * a full modeset because update_connector_routing force that. | |
545 | */ | |
546 | if (crtc->state->active != crtc_state->active) { | |
fa3ab4c2 VS |
547 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", |
548 | crtc->base.id, crtc->name); | |
eab3bbef DV |
549 | crtc_state->active_changed = true; |
550 | } | |
551 | ||
2465ff62 | 552 | if (!drm_atomic_crtc_needs_modeset(crtc_state)) |
623369e5 DV |
553 | continue; |
554 | ||
fa3ab4c2 VS |
555 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n", |
556 | crtc->base.id, crtc->name, | |
17a38d9c | 557 | crtc_state->enable ? 'y' : 'n', |
fa3ab4c2 | 558 | crtc_state->active ? 'y' : 'n'); |
623369e5 DV |
559 | |
560 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
561 | if (ret != 0) | |
562 | return ret; | |
563 | ||
57744aa7 ML |
564 | ret = drm_atomic_add_affected_planes(state, crtc); |
565 | if (ret != 0) | |
566 | return ret; | |
567 | ||
14de6c44 | 568 | if (crtc_state->enable != has_connectors) { |
fa3ab4c2 VS |
569 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", |
570 | crtc->base.id, crtc->name); | |
623369e5 DV |
571 | |
572 | return -EINVAL; | |
573 | } | |
574 | } | |
575 | ||
576 | return mode_fixup(state); | |
577 | } | |
d9b13620 | 578 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 579 | |
c2fcd274 | 580 | /** |
f98bd3ef | 581 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
582 | * @dev: DRM device |
583 | * @state: the driver state object | |
584 | * | |
585 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 DV |
586 | * This does all the plane update related checks using by calling into the |
587 | * ->atomic_check hooks provided by the driver. | |
c2fcd274 | 588 | * |
fc596660 ML |
589 | * It also sets crtc_state->planes_changed to indicate that a crtc has |
590 | * updated planes. | |
591 | * | |
c39032a8 | 592 | * RETURNS: |
c2fcd274 DV |
593 | * Zero for success or -errno |
594 | */ | |
d9b13620 DV |
595 | int |
596 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
597 | struct drm_atomic_state *state) | |
c2fcd274 | 598 | { |
df63b999 ACO |
599 | struct drm_crtc *crtc; |
600 | struct drm_crtc_state *crtc_state; | |
601 | struct drm_plane *plane; | |
602 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
603 | int i, ret = 0; |
604 | ||
df63b999 | 605 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 606 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
607 | |
608 | funcs = plane->helper_private; | |
609 | ||
610 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
611 | ||
612 | if (!funcs || !funcs->atomic_check) | |
613 | continue; | |
614 | ||
615 | ret = funcs->atomic_check(plane, plane_state); | |
616 | if (ret) { | |
9f4c97a2 VS |
617 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n", |
618 | plane->base.id, plane->name); | |
c2fcd274 DV |
619 | return ret; |
620 | } | |
621 | } | |
622 | ||
df63b999 | 623 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 624 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
625 | |
626 | funcs = crtc->helper_private; | |
627 | ||
628 | if (!funcs || !funcs->atomic_check) | |
629 | continue; | |
630 | ||
be9174a4 | 631 | ret = funcs->atomic_check(crtc, crtc_state); |
c2fcd274 | 632 | if (ret) { |
fa3ab4c2 VS |
633 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n", |
634 | crtc->base.id, crtc->name); | |
c2fcd274 DV |
635 | return ret; |
636 | } | |
637 | } | |
638 | ||
d9b13620 DV |
639 | return ret; |
640 | } | |
641 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
642 | ||
643 | /** | |
644 | * drm_atomic_helper_check - validate state object | |
645 | * @dev: DRM device | |
646 | * @state: the driver state object | |
647 | * | |
648 | * Check the state object to see if the requested state is physically possible. | |
649 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
650 | * checking that a driver needs it can simply wrap that around this function. | |
651 | * Drivers without such needs can directly use this as their ->atomic_check() | |
652 | * callback. | |
653 | * | |
b4274fbe DV |
654 | * This just wraps the two parts of the state checking for planes and modeset |
655 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
656 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
657 | * ->atomic_check functions depend upon an updated adjusted_mode.clock to | |
658 | * e.g. properly compute watermarks. | |
659 | * | |
c39032a8 | 660 | * RETURNS: |
d9b13620 DV |
661 | * Zero for success or -errno |
662 | */ | |
663 | int drm_atomic_helper_check(struct drm_device *dev, | |
664 | struct drm_atomic_state *state) | |
665 | { | |
666 | int ret; | |
667 | ||
b4274fbe | 668 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
669 | if (ret) |
670 | return ret; | |
671 | ||
b4274fbe | 672 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
673 | if (ret) |
674 | return ret; | |
675 | ||
c2fcd274 DV |
676 | return ret; |
677 | } | |
678 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
679 | ||
623369e5 DV |
680 | static void |
681 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
682 | { | |
df63b999 ACO |
683 | struct drm_connector *connector; |
684 | struct drm_connector_state *old_conn_state; | |
685 | struct drm_crtc *crtc; | |
686 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
687 | int i; |
688 | ||
df63b999 | 689 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 690 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
691 | struct drm_encoder *encoder; |
692 | ||
623369e5 DV |
693 | /* Shut down everything that's in the changeset and currently |
694 | * still on. So need to check the old, saved state. */ | |
df63b999 | 695 | if (!old_conn_state->crtc) |
623369e5 DV |
696 | continue; |
697 | ||
2943ef32 AH |
698 | old_crtc_state = drm_atomic_get_existing_crtc_state(old_state, |
699 | old_conn_state->crtc); | |
eab3bbef | 700 | |
4218a32f | 701 | if (!old_crtc_state->active || |
2465ff62 | 702 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) |
eab3bbef DV |
703 | continue; |
704 | ||
46df9adb | 705 | encoder = old_conn_state->best_encoder; |
623369e5 | 706 | |
46df9adb RC |
707 | /* We shouldn't get this far if we didn't previously have |
708 | * an encoder.. but WARN_ON() rather than explode. | |
709 | */ | |
710 | if (WARN_ON(!encoder)) | |
623369e5 DV |
711 | continue; |
712 | ||
713 | funcs = encoder->helper_private; | |
714 | ||
17a38d9c DV |
715 | DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
716 | encoder->base.id, encoder->name); | |
95d6eb3b | 717 | |
623369e5 DV |
718 | /* |
719 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 720 | * it away), so we won't call disable hooks twice. |
623369e5 | 721 | */ |
862e686c | 722 | drm_bridge_disable(encoder->bridge); |
623369e5 DV |
723 | |
724 | /* Right function depends upon target state. */ | |
2827635e NT |
725 | if (funcs) { |
726 | if (connector->state->crtc && funcs->prepare) | |
727 | funcs->prepare(encoder); | |
728 | else if (funcs->disable) | |
729 | funcs->disable(encoder); | |
730 | else if (funcs->dpms) | |
731 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
732 | } | |
623369e5 | 733 | |
862e686c | 734 | drm_bridge_post_disable(encoder->bridge); |
623369e5 DV |
735 | } |
736 | ||
df63b999 | 737 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 738 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
739 | |
740 | /* Shut down everything that needs a full modeset. */ | |
2465ff62 | 741 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
742 | continue; |
743 | ||
744 | if (!old_crtc_state->active) | |
623369e5 DV |
745 | continue; |
746 | ||
747 | funcs = crtc->helper_private; | |
748 | ||
fa3ab4c2 VS |
749 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n", |
750 | crtc->base.id, crtc->name); | |
95d6eb3b DV |
751 | |
752 | ||
623369e5 | 753 | /* Right function depends upon target state. */ |
ee0a89cf | 754 | if (crtc->state->enable && funcs->prepare) |
623369e5 | 755 | funcs->prepare(crtc); |
c9ac8b4c LY |
756 | else if (funcs->atomic_disable) |
757 | funcs->atomic_disable(crtc, old_crtc_state); | |
623369e5 DV |
758 | else if (funcs->disable) |
759 | funcs->disable(crtc); | |
760 | else | |
761 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
762 | } | |
763 | } | |
764 | ||
4c18d301 DV |
765 | /** |
766 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state | |
767 | * @dev: DRM device | |
768 | * @old_state: atomic state object with old state structures | |
769 | * | |
770 | * This function updates all the various legacy modeset state pointers in | |
771 | * connectors, encoders and crtcs. It also updates the timestamping constants | |
772 | * used for precise vblank timestamps by calling | |
773 | * drm_calc_timestamping_constants(). | |
774 | * | |
775 | * Drivers can use this for building their own atomic commit if they don't have | |
776 | * a pure helper-based modeset implementation. | |
777 | */ | |
778 | void | |
779 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, | |
780 | struct drm_atomic_state *old_state) | |
623369e5 | 781 | { |
df63b999 ACO |
782 | struct drm_connector *connector; |
783 | struct drm_connector_state *old_conn_state; | |
784 | struct drm_crtc *crtc; | |
785 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
786 | int i; |
787 | ||
8c10342c | 788 | /* clear out existing links and update dpms */ |
df63b999 | 789 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
8c10342c ML |
790 | if (connector->encoder) { |
791 | WARN_ON(!connector->encoder->crtc); | |
792 | ||
793 | connector->encoder->crtc = NULL; | |
794 | connector->encoder = NULL; | |
795 | } | |
623369e5 | 796 | |
8c10342c ML |
797 | crtc = connector->state->crtc; |
798 | if ((!crtc && old_conn_state->crtc) || | |
799 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { | |
800 | struct drm_property *dpms_prop = | |
801 | dev->mode_config.dpms_property; | |
802 | int mode = DRM_MODE_DPMS_OFF; | |
623369e5 | 803 | |
8c10342c ML |
804 | if (crtc && crtc->state->active) |
805 | mode = DRM_MODE_DPMS_ON; | |
806 | ||
807 | connector->dpms = mode; | |
808 | drm_object_property_set_value(&connector->base, | |
809 | dpms_prop, mode); | |
810 | } | |
623369e5 DV |
811 | } |
812 | ||
813 | /* set new links */ | |
df63b999 ACO |
814 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
815 | if (!connector->state->crtc) | |
623369e5 DV |
816 | continue; |
817 | ||
818 | if (WARN_ON(!connector->state->best_encoder)) | |
819 | continue; | |
820 | ||
821 | connector->encoder = connector->state->best_encoder; | |
822 | connector->encoder->crtc = connector->state->crtc; | |
823 | } | |
824 | ||
825 | /* set legacy state in the crtc structure */ | |
df63b999 | 826 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
2660801f ML |
827 | struct drm_plane *primary = crtc->primary; |
828 | ||
623369e5 DV |
829 | crtc->mode = crtc->state->mode; |
830 | crtc->enabled = crtc->state->enable; | |
2660801f ML |
831 | |
832 | if (drm_atomic_get_existing_plane_state(old_state, primary) && | |
833 | primary->state->crtc == crtc) { | |
834 | crtc->x = primary->state->src_x >> 16; | |
835 | crtc->y = primary->state->src_y >> 16; | |
836 | } | |
3d51d2d2 DV |
837 | |
838 | if (crtc->state->enable) | |
839 | drm_calc_timestamping_constants(crtc, | |
840 | &crtc->state->adjusted_mode); | |
623369e5 DV |
841 | } |
842 | } | |
4c18d301 | 843 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); |
623369e5 DV |
844 | |
845 | static void | |
846 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
847 | { | |
df63b999 ACO |
848 | struct drm_crtc *crtc; |
849 | struct drm_crtc_state *old_crtc_state; | |
850 | struct drm_connector *connector; | |
851 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
852 | int i; |
853 | ||
df63b999 | 854 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 855 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 856 | |
df63b999 | 857 | if (!crtc->state->mode_changed) |
623369e5 DV |
858 | continue; |
859 | ||
860 | funcs = crtc->helper_private; | |
861 | ||
c982bd90 | 862 | if (crtc->state->enable && funcs->mode_set_nofb) { |
fa3ab4c2 VS |
863 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n", |
864 | crtc->base.id, crtc->name); | |
95d6eb3b | 865 | |
623369e5 | 866 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 867 | } |
623369e5 DV |
868 | } |
869 | ||
df63b999 | 870 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 871 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 872 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
873 | struct drm_encoder *encoder; |
874 | struct drm_display_mode *mode, *adjusted_mode; | |
875 | ||
df63b999 | 876 | if (!connector->state->best_encoder) |
623369e5 DV |
877 | continue; |
878 | ||
879 | encoder = connector->state->best_encoder; | |
880 | funcs = encoder->helper_private; | |
881 | new_crtc_state = connector->state->crtc->state; | |
882 | mode = &new_crtc_state->mode; | |
883 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
884 | ||
eab3bbef DV |
885 | if (!new_crtc_state->mode_changed) |
886 | continue; | |
887 | ||
17a38d9c DV |
888 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
889 | encoder->base.id, encoder->name); | |
95d6eb3b | 890 | |
623369e5 DV |
891 | /* |
892 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 893 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 894 | */ |
fe4a11c9 PZ |
895 | if (funcs && funcs->atomic_mode_set) { |
896 | funcs->atomic_mode_set(encoder, new_crtc_state, | |
897 | connector->state); | |
898 | } else if (funcs && funcs->mode_set) { | |
c982bd90 | 899 | funcs->mode_set(encoder, mode, adjusted_mode); |
fe4a11c9 | 900 | } |
623369e5 | 901 | |
862e686c | 902 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
623369e5 DV |
903 | } |
904 | } | |
905 | ||
906 | /** | |
1af434a9 | 907 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 908 | * @dev: DRM device |
a072f809 | 909 | * @old_state: atomic state object with old state structures |
623369e5 | 910 | * |
1af434a9 | 911 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 912 | * prepares them (if required) with the new mode. |
1af434a9 | 913 | * |
60acc4eb | 914 | * For compatibility with legacy crtc helpers this should be called before |
1af434a9 DV |
915 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
916 | * does. But drivers with different needs can group the modeset commits together | |
917 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
918 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 919 | */ |
1af434a9 DV |
920 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
921 | struct drm_atomic_state *old_state) | |
623369e5 | 922 | { |
a072f809 | 923 | disable_outputs(dev, old_state); |
4c18d301 DV |
924 | |
925 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); | |
926 | ||
a072f809 | 927 | crtc_set_mode(dev, old_state); |
623369e5 | 928 | } |
1af434a9 | 929 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 DV |
930 | |
931 | /** | |
1af434a9 | 932 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
933 | * @dev: DRM device |
934 | * @old_state: atomic state object with old state structures | |
935 | * | |
1af434a9 DV |
936 | * This function enables all the outputs with the new configuration which had to |
937 | * be turned off for the update. | |
938 | * | |
60acc4eb | 939 | * For compatibility with legacy crtc helpers this should be called after |
1af434a9 DV |
940 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
941 | * does. But drivers with different needs can group the modeset commits together | |
942 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
943 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 944 | */ |
1af434a9 DV |
945 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
946 | struct drm_atomic_state *old_state) | |
623369e5 | 947 | { |
df63b999 ACO |
948 | struct drm_crtc *crtc; |
949 | struct drm_crtc_state *old_crtc_state; | |
950 | struct drm_connector *connector; | |
951 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
952 | int i; |
953 | ||
df63b999 | 954 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 955 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
956 | |
957 | /* Need to filter out CRTCs where only planes change. */ | |
2465ff62 | 958 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
959 | continue; |
960 | ||
961 | if (!crtc->state->active) | |
623369e5 DV |
962 | continue; |
963 | ||
964 | funcs = crtc->helper_private; | |
965 | ||
ee0a89cf | 966 | if (crtc->state->enable) { |
fa3ab4c2 VS |
967 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n", |
968 | crtc->base.id, crtc->name); | |
95d6eb3b | 969 | |
ee0a89cf DV |
970 | if (funcs->enable) |
971 | funcs->enable(crtc); | |
972 | else | |
973 | funcs->commit(crtc); | |
974 | } | |
623369e5 DV |
975 | } |
976 | ||
df63b999 | 977 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 978 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
979 | struct drm_encoder *encoder; |
980 | ||
df63b999 | 981 | if (!connector->state->best_encoder) |
623369e5 DV |
982 | continue; |
983 | ||
4218a32f | 984 | if (!connector->state->crtc->state->active || |
2465ff62 | 985 | !drm_atomic_crtc_needs_modeset(connector->state->crtc->state)) |
eab3bbef DV |
986 | continue; |
987 | ||
623369e5 DV |
988 | encoder = connector->state->best_encoder; |
989 | funcs = encoder->helper_private; | |
990 | ||
17a38d9c DV |
991 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
992 | encoder->base.id, encoder->name); | |
95d6eb3b | 993 | |
623369e5 DV |
994 | /* |
995 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 996 | * it away), so we won't call enable hooks twice. |
623369e5 | 997 | */ |
862e686c | 998 | drm_bridge_pre_enable(encoder->bridge); |
623369e5 | 999 | |
2827635e NT |
1000 | if (funcs) { |
1001 | if (funcs->enable) | |
1002 | funcs->enable(encoder); | |
1003 | else if (funcs->commit) | |
1004 | funcs->commit(encoder); | |
1005 | } | |
623369e5 | 1006 | |
862e686c | 1007 | drm_bridge_enable(encoder->bridge); |
623369e5 DV |
1008 | } |
1009 | } | |
1af434a9 | 1010 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 1011 | |
4c5b7f3a RC |
1012 | /** |
1013 | * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state | |
1014 | * @dev: DRM device | |
1015 | * @state: atomic state object with old state structures | |
1ea0c02e DV |
1016 | * @pre_swap: If true, do an interruptible wait, and @state is the new state. |
1017 | * Otherwise @state is the old state. | |
4c5b7f3a RC |
1018 | * |
1019 | * For implicit sync, driver should fish the exclusive fence out from the | |
1020 | * incoming fb's and stash it in the drm_plane_state. This is called after | |
1021 | * drm_atomic_helper_swap_state() so it uses the current plane state (and | |
1022 | * just uses the atomic state to find the changed planes) | |
f6ce410a | 1023 | * |
1ea0c02e DV |
1024 | * Note that @pre_swap is needed since the point where we block for fences moves |
1025 | * around depending upon whether an atomic commit is blocking or | |
1026 | * non-blocking. For async commit all waiting needs to happen after | |
1027 | * drm_atomic_helper_swap_state() is called, but for synchronous commits we want | |
1028 | * to wait **before** we do anything that can't be easily rolled back. That is | |
1029 | * before we call drm_atomic_helper_swap_state(). | |
1030 | * | |
f54d1867 | 1031 | * Returns zero if success or < 0 if dma_fence_wait() fails. |
4c5b7f3a | 1032 | */ |
f6ce410a GP |
1033 | int drm_atomic_helper_wait_for_fences(struct drm_device *dev, |
1034 | struct drm_atomic_state *state, | |
1035 | bool pre_swap) | |
e2330f07 | 1036 | { |
df63b999 ACO |
1037 | struct drm_plane *plane; |
1038 | struct drm_plane_state *plane_state; | |
f6ce410a | 1039 | int i, ret; |
e2330f07 | 1040 | |
df63b999 | 1041 | for_each_plane_in_state(state, plane, plane_state, i) { |
f6ce410a GP |
1042 | if (!pre_swap) |
1043 | plane_state = plane->state; | |
1044 | ||
1045 | if (!plane_state->fence) | |
e2330f07 DV |
1046 | continue; |
1047 | ||
f6ce410a GP |
1048 | WARN_ON(!plane_state->fb); |
1049 | ||
1050 | /* | |
1051 | * If waiting for fences pre-swap (ie: nonblock), userspace can | |
1052 | * still interrupt the operation. Instead of blocking until the | |
1053 | * timer expires, make the wait interruptible. | |
1054 | */ | |
f54d1867 | 1055 | ret = dma_fence_wait(plane_state->fence, pre_swap); |
f6ce410a GP |
1056 | if (ret) |
1057 | return ret; | |
e2330f07 | 1058 | |
f54d1867 | 1059 | dma_fence_put(plane_state->fence); |
f6ce410a | 1060 | plane_state->fence = NULL; |
e2330f07 | 1061 | } |
f6ce410a GP |
1062 | |
1063 | return 0; | |
e2330f07 | 1064 | } |
4c5b7f3a | 1065 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences); |
e2330f07 | 1066 | |
5ee3229c RC |
1067 | /** |
1068 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
1069 | * @dev: DRM device | |
1070 | * @old_state: atomic state object with old state structures | |
1071 | * | |
1072 | * Helper to, after atomic commit, wait for vblanks on all effected | |
1073 | * crtcs (ie. before cleaning up old framebuffers using | |
ab58e338 DV |
1074 | * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
1075 | * framebuffers have actually changed to optimize for the legacy cursor and | |
1076 | * plane update use-case. | |
5ee3229c RC |
1077 | */ |
1078 | void | |
1079 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
1080 | struct drm_atomic_state *old_state) | |
623369e5 DV |
1081 | { |
1082 | struct drm_crtc *crtc; | |
1083 | struct drm_crtc_state *old_crtc_state; | |
623369e5 | 1084 | int i, ret; |
bdc57146 | 1085 | unsigned crtc_mask = 0; |
623369e5 | 1086 | |
bdc57146 ML |
1087 | /* |
1088 | * Legacy cursor ioctls are completely unsynced, and userspace | |
1089 | * relies on that (by doing tons of cursor updates). | |
1090 | */ | |
1091 | if (old_state->legacy_cursor_update) | |
1092 | return; | |
623369e5 | 1093 | |
bdc57146 ML |
1094 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
1095 | struct drm_crtc_state *new_crtc_state = crtc->state; | |
623369e5 | 1096 | |
a3fbb53f | 1097 | if (!new_crtc_state->active || !new_crtc_state->planes_changed) |
ab58e338 DV |
1098 | continue; |
1099 | ||
623369e5 DV |
1100 | ret = drm_crtc_vblank_get(crtc); |
1101 | if (ret != 0) | |
1102 | continue; | |
1103 | ||
bdc57146 ML |
1104 | crtc_mask |= drm_crtc_mask(crtc); |
1105 | old_state->crtcs[i].last_vblank_count = drm_crtc_vblank_count(crtc); | |
623369e5 DV |
1106 | } |
1107 | ||
df63b999 | 1108 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
bdc57146 | 1109 | if (!(crtc_mask & drm_crtc_mask(crtc))) |
623369e5 DV |
1110 | continue; |
1111 | ||
1112 | ret = wait_event_timeout(dev->vblank[i].queue, | |
bdc57146 | 1113 | old_state->crtcs[i].last_vblank_count != |
d4853630 | 1114 | drm_crtc_vblank_count(crtc), |
623369e5 DV |
1115 | msecs_to_jiffies(50)); |
1116 | ||
8d4d0d70 VS |
1117 | WARN(!ret, "[CRTC:%d] vblank wait timed out\n", crtc->base.id); |
1118 | ||
623369e5 DV |
1119 | drm_crtc_vblank_put(crtc); |
1120 | } | |
1121 | } | |
5ee3229c | 1122 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 DV |
1123 | |
1124 | /** | |
9f2a7950 | 1125 | * drm_atomic_helper_commit_tail - commit atomic update to hardware |
1ea0c02e | 1126 | * @old_state: atomic state object with old state structures |
623369e5 | 1127 | * |
9f2a7950 DV |
1128 | * This is the default implemenation for the ->atomic_commit_tail() hook of the |
1129 | * &drm_mode_config_helper_funcs vtable. | |
623369e5 | 1130 | * |
9f2a7950 DV |
1131 | * Note that the default ordering of how the various stages are called is to |
1132 | * match the legacy modeset helper library closest. One peculiarity of that is | |
1133 | * that it doesn't mesh well with runtime PM at all. | |
6e48ae32 | 1134 | * |
9f2a7950 | 1135 | * For drivers supporting runtime PM the recommended sequence is instead :: |
6e48ae32 | 1136 | * |
1ea0c02e | 1137 | * drm_atomic_helper_commit_modeset_disables(dev, old_state); |
6e48ae32 | 1138 | * |
1ea0c02e | 1139 | * drm_atomic_helper_commit_modeset_enables(dev, old_state); |
6e48ae32 | 1140 | * |
1ea0c02e | 1141 | * drm_atomic_helper_commit_planes(dev, old_state, |
2b58e98d | 1142 | * DRM_PLANE_COMMIT_ACTIVE_ONLY); |
6e48ae32 | 1143 | * |
9f2a7950 DV |
1144 | * for committing the atomic update to hardware. See the kerneldoc entries for |
1145 | * these three functions for more details. | |
1146 | */ | |
1ea0c02e | 1147 | void drm_atomic_helper_commit_tail(struct drm_atomic_state *old_state) |
9f2a7950 | 1148 | { |
1ea0c02e | 1149 | struct drm_device *dev = old_state->dev; |
9f2a7950 | 1150 | |
1ea0c02e | 1151 | drm_atomic_helper_commit_modeset_disables(dev, old_state); |
9f2a7950 | 1152 | |
1ea0c02e | 1153 | drm_atomic_helper_commit_planes(dev, old_state, 0); |
9f2a7950 | 1154 | |
1ea0c02e | 1155 | drm_atomic_helper_commit_modeset_enables(dev, old_state); |
9f2a7950 | 1156 | |
1ea0c02e | 1157 | drm_atomic_helper_commit_hw_done(old_state); |
9f2a7950 | 1158 | |
1ea0c02e | 1159 | drm_atomic_helper_wait_for_vblanks(dev, old_state); |
9f2a7950 | 1160 | |
1ea0c02e | 1161 | drm_atomic_helper_cleanup_planes(dev, old_state); |
9f2a7950 DV |
1162 | } |
1163 | EXPORT_SYMBOL(drm_atomic_helper_commit_tail); | |
1164 | ||
1ea0c02e | 1165 | static void commit_tail(struct drm_atomic_state *old_state) |
9f2a7950 | 1166 | { |
1ea0c02e | 1167 | struct drm_device *dev = old_state->dev; |
9f2a7950 DV |
1168 | struct drm_mode_config_helper_funcs *funcs; |
1169 | ||
1170 | funcs = dev->mode_config.helper_private; | |
1171 | ||
1ea0c02e | 1172 | drm_atomic_helper_wait_for_fences(dev, old_state, false); |
9f2a7950 | 1173 | |
1ea0c02e | 1174 | drm_atomic_helper_wait_for_dependencies(old_state); |
9f2a7950 DV |
1175 | |
1176 | if (funcs && funcs->atomic_commit_tail) | |
1ea0c02e | 1177 | funcs->atomic_commit_tail(old_state); |
9f2a7950 | 1178 | else |
1ea0c02e | 1179 | drm_atomic_helper_commit_tail(old_state); |
9f2a7950 | 1180 | |
1ea0c02e | 1181 | drm_atomic_helper_commit_cleanup_done(old_state); |
9f2a7950 | 1182 | |
1ea0c02e | 1183 | drm_atomic_state_put(old_state); |
9f2a7950 DV |
1184 | } |
1185 | ||
1186 | static void commit_work(struct work_struct *work) | |
1187 | { | |
1188 | struct drm_atomic_state *state = container_of(work, | |
1189 | struct drm_atomic_state, | |
1190 | commit_work); | |
1191 | commit_tail(state); | |
1192 | } | |
1193 | ||
1194 | /** | |
1195 | * drm_atomic_helper_commit - commit validated state object | |
1196 | * @dev: DRM device | |
1197 | * @state: the driver state object | |
1198 | * @nonblock: whether nonblocking behavior is requested. | |
1199 | * | |
1200 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
1201 | * object. This can still fail when e.g. the framebuffer reservation fails. This | |
1202 | * function implements nonblocking commits, using | |
1203 | * drm_atomic_helper_setup_commit() and related functions. | |
1204 | * | |
9f2a7950 DV |
1205 | * Committing the actual hardware state is done through the |
1206 | * ->atomic_commit_tail() callback of the &drm_mode_config_helper_funcs vtable, | |
1207 | * or it's default implementation drm_atomic_helper_commit_tail(). | |
6e48ae32 | 1208 | * |
c39032a8 | 1209 | * RETURNS: |
623369e5 DV |
1210 | * Zero for success or -errno. |
1211 | */ | |
1212 | int drm_atomic_helper_commit(struct drm_device *dev, | |
1213 | struct drm_atomic_state *state, | |
286dbb8d | 1214 | bool nonblock) |
623369e5 DV |
1215 | { |
1216 | int ret; | |
1217 | ||
a095caa7 DV |
1218 | ret = drm_atomic_helper_setup_commit(state, nonblock); |
1219 | if (ret) | |
1220 | return ret; | |
1221 | ||
9f2a7950 DV |
1222 | INIT_WORK(&state->commit_work, commit_work); |
1223 | ||
623369e5 DV |
1224 | ret = drm_atomic_helper_prepare_planes(dev, state); |
1225 | if (ret) | |
1226 | return ret; | |
1227 | ||
f6ce410a GP |
1228 | if (!nonblock) { |
1229 | ret = drm_atomic_helper_wait_for_fences(dev, state, true); | |
1230 | if (ret) | |
1231 | return ret; | |
1232 | } | |
1233 | ||
623369e5 DV |
1234 | /* |
1235 | * This is the point of no return - everything below never fails except | |
1236 | * when the hw goes bonghits. Which means we can commit the new state on | |
1237 | * the software side now. | |
1238 | */ | |
1239 | ||
5e84c269 | 1240 | drm_atomic_helper_swap_state(state, true); |
623369e5 DV |
1241 | |
1242 | /* | |
1243 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 1244 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
1245 | * that the asynchronous work has either been cancelled (if the driver |
1246 | * supports it, which at least requires that the framebuffers get | |
1247 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
1248 | * before the new state gets committed on the software side with | |
1249 | * drm_atomic_helper_swap_state(). | |
1250 | * | |
1251 | * This scheme allows new atomic state updates to be prepared and | |
1252 | * checked in parallel to the asynchronous completion of the previous | |
1253 | * update. Which is important since compositors need to figure out the | |
1254 | * composition of the next frame right after having submitted the | |
1255 | * current layout. | |
9f2a7950 DV |
1256 | * |
1257 | * NOTE: Commit work has multiple phases, first hardware commit, then | |
1258 | * cleanup. We want them to overlap, hence need system_unbound_wq to | |
1259 | * make sure work items don't artifically stall on each another. | |
623369e5 DV |
1260 | */ |
1261 | ||
0853695c | 1262 | drm_atomic_state_get(state); |
9f2a7950 DV |
1263 | if (nonblock) |
1264 | queue_work(system_unbound_wq, &state->commit_work); | |
1265 | else | |
1266 | commit_tail(state); | |
623369e5 DV |
1267 | |
1268 | return 0; | |
1269 | } | |
1270 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1271 | ||
e8c833a7 | 1272 | /** |
286dbb8d | 1273 | * DOC: implementing nonblocking commit |
e8c833a7 | 1274 | * |
9f2a7950 | 1275 | * Nonblocking atomic commits have to be implemented in the following sequence: |
e8c833a7 DV |
1276 | * |
1277 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
1278 | * which commit needs to call which can fail, so we want to run it first and | |
1279 | * synchronously. | |
1280 | * | |
286dbb8d | 1281 | * 2. Synchronize with any outstanding nonblocking commit worker threads which |
e8c833a7 DV |
1282 | * might be affected the new state update. This can be done by either cancelling |
1283 | * or flushing the work items, depending upon whether the driver can deal with | |
1284 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
1285 | * cleanup is still done when cancelling. | |
1286 | * | |
9f2a7950 DV |
1287 | * Asynchronous workers need to have sufficient parallelism to be able to run |
1288 | * different atomic commits on different CRTCs in parallel. The simplest way to | |
1289 | * achive this is by running them on the &system_unbound_wq work queue. Note | |
1290 | * that drivers are not required to split up atomic commits and run an | |
1291 | * individual commit in parallel - userspace is supposed to do that if it cares. | |
1292 | * But it might be beneficial to do that for modesets, since those necessarily | |
1293 | * must be done as one global operation, and enabling or disabling a CRTC can | |
1294 | * take a long time. But even that is not required. | |
e8c833a7 DV |
1295 | * |
1296 | * 3. The software state is updated synchronously with | |
26196f7e | 1297 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
e8c833a7 | 1298 | * locks means concurrent callers never see inconsistent state. And doing this |
286dbb8d ML |
1299 | * while it's guaranteed that no relevant nonblocking worker runs means that |
1300 | * nonblocking workers do not need grab any locks. Actually they must not grab | |
1301 | * locks, for otherwise the work flushing will deadlock. | |
e8c833a7 DV |
1302 | * |
1303 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1304 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1305 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
1306 | * being displayed. | |
9f2a7950 DV |
1307 | * |
1308 | * The above scheme is implemented in the atomic helper libraries in | |
1309 | * drm_atomic_helper_commit() using a bunch of helper functions. See | |
1310 | * drm_atomic_helper_setup_commit() for a starting point. | |
e8c833a7 DV |
1311 | */ |
1312 | ||
a095caa7 DV |
1313 | static int stall_checks(struct drm_crtc *crtc, bool nonblock) |
1314 | { | |
1315 | struct drm_crtc_commit *commit, *stall_commit = NULL; | |
1316 | bool completed = true; | |
1317 | int i; | |
1318 | long ret = 0; | |
1319 | ||
1320 | spin_lock(&crtc->commit_lock); | |
1321 | i = 0; | |
1322 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) { | |
1323 | if (i == 0) { | |
1324 | completed = try_wait_for_completion(&commit->flip_done); | |
1325 | /* Userspace is not allowed to get ahead of the previous | |
1326 | * commit with nonblocking ones. */ | |
1327 | if (!completed && nonblock) { | |
1328 | spin_unlock(&crtc->commit_lock); | |
1329 | return -EBUSY; | |
1330 | } | |
1331 | } else if (i == 1) { | |
1332 | stall_commit = commit; | |
1333 | drm_crtc_commit_get(stall_commit); | |
a095caa7 | 1334 | break; |
723c3e55 | 1335 | } |
a095caa7 DV |
1336 | |
1337 | i++; | |
1338 | } | |
1339 | spin_unlock(&crtc->commit_lock); | |
1340 | ||
1341 | if (!stall_commit) | |
1342 | return 0; | |
1343 | ||
1344 | /* We don't want to let commits get ahead of cleanup work too much, | |
1345 | * stalling on 2nd previous commit means triple-buffer won't ever stall. | |
1346 | */ | |
723c3e55 | 1347 | ret = wait_for_completion_interruptible_timeout(&stall_commit->cleanup_done, |
a095caa7 DV |
1348 | 10*HZ); |
1349 | if (ret == 0) | |
1350 | DRM_ERROR("[CRTC:%d:%s] cleanup_done timed out\n", | |
1351 | crtc->base.id, crtc->name); | |
1352 | ||
1353 | drm_crtc_commit_put(stall_commit); | |
1354 | ||
1355 | return ret < 0 ? ret : 0; | |
1356 | } | |
1357 | ||
1358 | /** | |
1359 | * drm_atomic_helper_setup_commit - setup possibly nonblocking commit | |
1360 | * @state: new modeset state to be committed | |
1361 | * @nonblock: whether nonblocking behavior is requested. | |
1362 | * | |
1363 | * This function prepares @state to be used by the atomic helper's support for | |
1364 | * nonblocking commits. Drivers using the nonblocking commit infrastructure | |
1365 | * should always call this function from their ->atomic_commit hook. | |
1366 | * | |
1367 | * To be able to use this support drivers need to use a few more helper | |
1368 | * functions. drm_atomic_helper_wait_for_dependencies() must be called before | |
1369 | * actually committing the hardware state, and for nonblocking commits this call | |
1370 | * must be placed in the async worker. See also drm_atomic_helper_swap_state() | |
1371 | * and it's stall parameter, for when a driver's commit hooks look at the | |
1372 | * ->state pointers of struct &drm_crtc, &drm_plane or &drm_connector directly. | |
1373 | * | |
1374 | * Completion of the hardware commit step must be signalled using | |
1375 | * drm_atomic_helper_commit_hw_done(). After this step the driver is not allowed | |
1376 | * to read or change any permanent software or hardware modeset state. The only | |
1377 | * exception is state protected by other means than &drm_modeset_lock locks. | |
1378 | * Only the free standing @state with pointers to the old state structures can | |
1379 | * be inspected, e.g. to clean up old buffers using | |
1380 | * drm_atomic_helper_cleanup_planes(). | |
1381 | * | |
1382 | * At the very end, before cleaning up @state drivers must call | |
1383 | * drm_atomic_helper_commit_cleanup_done(). | |
1384 | * | |
1385 | * This is all implemented by in drm_atomic_helper_commit(), giving drivers a | |
1386 | * complete and esay-to-use default implementation of the atomic_commit() hook. | |
1387 | * | |
1388 | * The tracking of asynchronously executed and still pending commits is done | |
1389 | * using the core structure &drm_crtc_commit. | |
1390 | * | |
1391 | * By default there's no need to clean up resources allocated by this function | |
1392 | * explicitly: drm_atomic_state_default_clear() will take care of that | |
1393 | * automatically. | |
1394 | * | |
1395 | * Returns: | |
1396 | * | |
1397 | * 0 on success. -EBUSY when userspace schedules nonblocking commits too fast, | |
1398 | * -ENOMEM on allocation failures and -EINTR when a signal is pending. | |
1399 | */ | |
1400 | int drm_atomic_helper_setup_commit(struct drm_atomic_state *state, | |
1401 | bool nonblock) | |
1402 | { | |
1403 | struct drm_crtc *crtc; | |
1404 | struct drm_crtc_state *crtc_state; | |
1405 | struct drm_crtc_commit *commit; | |
1406 | int i, ret; | |
1407 | ||
1408 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1409 | commit = kzalloc(sizeof(*commit), GFP_KERNEL); | |
1410 | if (!commit) | |
1411 | return -ENOMEM; | |
1412 | ||
1413 | init_completion(&commit->flip_done); | |
1414 | init_completion(&commit->hw_done); | |
1415 | init_completion(&commit->cleanup_done); | |
1416 | INIT_LIST_HEAD(&commit->commit_entry); | |
1417 | kref_init(&commit->ref); | |
1418 | commit->crtc = crtc; | |
1419 | ||
1420 | state->crtcs[i].commit = commit; | |
1421 | ||
1422 | ret = stall_checks(crtc, nonblock); | |
1423 | if (ret) | |
1424 | return ret; | |
1425 | ||
1426 | /* Drivers only send out events when at least either current or | |
1427 | * new CRTC state is active. Complete right away if everything | |
1428 | * stays off. */ | |
1429 | if (!crtc->state->active && !crtc_state->active) { | |
1430 | complete_all(&commit->flip_done); | |
1431 | continue; | |
1432 | } | |
1433 | ||
1434 | /* Legacy cursor updates are fully unsynced. */ | |
1435 | if (state->legacy_cursor_update) { | |
1436 | complete_all(&commit->flip_done); | |
1437 | continue; | |
1438 | } | |
1439 | ||
1440 | if (!crtc_state->event) { | |
1441 | commit->event = kzalloc(sizeof(*commit->event), | |
1442 | GFP_KERNEL); | |
1443 | if (!commit->event) | |
1444 | return -ENOMEM; | |
1445 | ||
1446 | crtc_state->event = commit->event; | |
1447 | } | |
1448 | ||
1449 | crtc_state->event->base.completion = &commit->flip_done; | |
1450 | } | |
1451 | ||
1452 | return 0; | |
1453 | } | |
1454 | EXPORT_SYMBOL(drm_atomic_helper_setup_commit); | |
1455 | ||
1456 | ||
1457 | static struct drm_crtc_commit *preceeding_commit(struct drm_crtc *crtc) | |
1458 | { | |
1459 | struct drm_crtc_commit *commit; | |
1460 | int i = 0; | |
1461 | ||
1462 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) { | |
1463 | /* skip the first entry, that's the current commit */ | |
1464 | if (i == 1) | |
1465 | return commit; | |
1466 | i++; | |
1467 | } | |
1468 | ||
1469 | return NULL; | |
1470 | } | |
1471 | ||
1472 | /** | |
1473 | * drm_atomic_helper_wait_for_dependencies - wait for required preceeding commits | |
1ea0c02e | 1474 | * @old_state: atomic state object with old state structures |
a095caa7 DV |
1475 | * |
1476 | * This function waits for all preceeding commits that touch the same CRTC as | |
1ea0c02e | 1477 | * @old_state to both be committed to the hardware (as signalled by |
a095caa7 DV |
1478 | * drm_atomic_helper_commit_hw_done) and executed by the hardware (as signalled |
1479 | * by calling drm_crtc_vblank_send_event on the event member of | |
1480 | * &drm_crtc_state). | |
1481 | * | |
1482 | * This is part of the atomic helper support for nonblocking commits, see | |
1483 | * drm_atomic_helper_setup_commit() for an overview. | |
1484 | */ | |
1ea0c02e | 1485 | void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *old_state) |
a095caa7 DV |
1486 | { |
1487 | struct drm_crtc *crtc; | |
1488 | struct drm_crtc_state *crtc_state; | |
1489 | struct drm_crtc_commit *commit; | |
1490 | int i; | |
1491 | long ret; | |
1492 | ||
1ea0c02e | 1493 | for_each_crtc_in_state(old_state, crtc, crtc_state, i) { |
a095caa7 DV |
1494 | spin_lock(&crtc->commit_lock); |
1495 | commit = preceeding_commit(crtc); | |
1496 | if (commit) | |
1497 | drm_crtc_commit_get(commit); | |
1498 | spin_unlock(&crtc->commit_lock); | |
1499 | ||
1500 | if (!commit) | |
1501 | continue; | |
1502 | ||
1503 | ret = wait_for_completion_timeout(&commit->hw_done, | |
1504 | 10*HZ); | |
1505 | if (ret == 0) | |
1506 | DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n", | |
1507 | crtc->base.id, crtc->name); | |
1508 | ||
1509 | /* Currently no support for overwriting flips, hence | |
1510 | * stall for previous one to execute completely. */ | |
1511 | ret = wait_for_completion_timeout(&commit->flip_done, | |
1512 | 10*HZ); | |
1513 | if (ret == 0) | |
1514 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
1515 | crtc->base.id, crtc->name); | |
1516 | ||
1517 | drm_crtc_commit_put(commit); | |
1518 | } | |
1519 | } | |
1520 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies); | |
1521 | ||
1522 | /** | |
1523 | * drm_atomic_helper_commit_hw_done - setup possible nonblocking commit | |
1ea0c02e | 1524 | * @old_state: atomic state object with old state structures |
a095caa7 DV |
1525 | * |
1526 | * This function is used to signal completion of the hardware commit step. After | |
1527 | * this step the driver is not allowed to read or change any permanent software | |
1528 | * or hardware modeset state. The only exception is state protected by other | |
1529 | * means than &drm_modeset_lock locks. | |
1530 | * | |
1531 | * Drivers should try to postpone any expensive or delayed cleanup work after | |
1532 | * this function is called. | |
1533 | * | |
1534 | * This is part of the atomic helper support for nonblocking commits, see | |
1535 | * drm_atomic_helper_setup_commit() for an overview. | |
1536 | */ | |
1ea0c02e | 1537 | void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *old_state) |
a095caa7 DV |
1538 | { |
1539 | struct drm_crtc *crtc; | |
1540 | struct drm_crtc_state *crtc_state; | |
1541 | struct drm_crtc_commit *commit; | |
1542 | int i; | |
1543 | ||
1ea0c02e DV |
1544 | for_each_crtc_in_state(old_state, crtc, crtc_state, i) { |
1545 | commit = old_state->crtcs[i].commit; | |
a095caa7 DV |
1546 | if (!commit) |
1547 | continue; | |
1548 | ||
1549 | /* backend must have consumed any event by now */ | |
1550 | WARN_ON(crtc->state->event); | |
1551 | spin_lock(&crtc->commit_lock); | |
1552 | complete_all(&commit->hw_done); | |
1553 | spin_unlock(&crtc->commit_lock); | |
1554 | } | |
1555 | } | |
1556 | EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done); | |
1557 | ||
1558 | /** | |
1559 | * drm_atomic_helper_commit_cleanup_done - signal completion of commit | |
1ea0c02e | 1560 | * @old_state: atomic state object with old state structures |
a095caa7 | 1561 | * |
1ea0c02e DV |
1562 | * This signals completion of the atomic update @old_state, including any |
1563 | * cleanup work. If used, it must be called right before calling | |
0853695c | 1564 | * drm_atomic_state_put(). |
a095caa7 DV |
1565 | * |
1566 | * This is part of the atomic helper support for nonblocking commits, see | |
1567 | * drm_atomic_helper_setup_commit() for an overview. | |
1568 | */ | |
1ea0c02e | 1569 | void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *old_state) |
a095caa7 DV |
1570 | { |
1571 | struct drm_crtc *crtc; | |
1572 | struct drm_crtc_state *crtc_state; | |
1573 | struct drm_crtc_commit *commit; | |
1574 | int i; | |
1575 | long ret; | |
1576 | ||
1ea0c02e DV |
1577 | for_each_crtc_in_state(old_state, crtc, crtc_state, i) { |
1578 | commit = old_state->crtcs[i].commit; | |
a095caa7 DV |
1579 | if (WARN_ON(!commit)) |
1580 | continue; | |
1581 | ||
1582 | spin_lock(&crtc->commit_lock); | |
1583 | complete_all(&commit->cleanup_done); | |
1584 | WARN_ON(!try_wait_for_completion(&commit->hw_done)); | |
1585 | ||
1586 | /* commit_list borrows our reference, need to remove before we | |
1587 | * clean up our drm_atomic_state. But only after it actually | |
1588 | * completed, otherwise subsequent commits won't stall properly. */ | |
7deef7f1 DV |
1589 | if (try_wait_for_completion(&commit->flip_done)) |
1590 | goto del_commit; | |
a095caa7 DV |
1591 | |
1592 | spin_unlock(&crtc->commit_lock); | |
1593 | ||
1594 | /* We must wait for the vblank event to signal our completion | |
1595 | * before releasing our reference, since the vblank work does | |
1596 | * not hold a reference of its own. */ | |
1597 | ret = wait_for_completion_timeout(&commit->flip_done, | |
1598 | 10*HZ); | |
1599 | if (ret == 0) | |
1600 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
1601 | crtc->base.id, crtc->name); | |
1602 | ||
1603 | spin_lock(&crtc->commit_lock); | |
7deef7f1 | 1604 | del_commit: |
a095caa7 DV |
1605 | list_del(&commit->commit_entry); |
1606 | spin_unlock(&crtc->commit_lock); | |
1607 | } | |
1608 | } | |
1609 | EXPORT_SYMBOL(drm_atomic_helper_commit_cleanup_done); | |
1610 | ||
c2fcd274 | 1611 | /** |
2e3afd47 | 1612 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 1613 | * @dev: DRM device |
2e3afd47 | 1614 | * @state: atomic state object with new state structures |
c2fcd274 DV |
1615 | * |
1616 | * This function prepares plane state, specifically framebuffers, for the new | |
1617 | * configuration. If any failure is encountered this function will call | |
1618 | * ->cleanup_fb on any already successfully prepared framebuffer. | |
1619 | * | |
1620 | * Returns: | |
1621 | * 0 on success, negative error code on failure. | |
1622 | */ | |
1623 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
1624 | struct drm_atomic_state *state) | |
1625 | { | |
be9174a4 DV |
1626 | struct drm_plane *plane; |
1627 | struct drm_plane_state *plane_state; | |
1628 | int ret, i, j; | |
c2fcd274 | 1629 | |
be9174a4 | 1630 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 1631 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
1632 | |
1633 | funcs = plane->helper_private; | |
1634 | ||
844f9111 ML |
1635 | if (funcs->prepare_fb) { |
1636 | ret = funcs->prepare_fb(plane, plane_state); | |
c2fcd274 DV |
1637 | if (ret) |
1638 | goto fail; | |
1639 | } | |
1640 | } | |
1641 | ||
1642 | return 0; | |
1643 | ||
1644 | fail: | |
be9174a4 | 1645 | for_each_plane_in_state(state, plane, plane_state, j) { |
b5ceff20 | 1646 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1647 | |
be9174a4 | 1648 | if (j >= i) |
c2fcd274 DV |
1649 | continue; |
1650 | ||
1651 | funcs = plane->helper_private; | |
1652 | ||
844f9111 ML |
1653 | if (funcs->cleanup_fb) |
1654 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1655 | } |
1656 | ||
1657 | return ret; | |
1658 | } | |
1659 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
1660 | ||
7135ac54 | 1661 | static bool plane_crtc_active(const struct drm_plane_state *state) |
aef9dbb8 DV |
1662 | { |
1663 | return state->crtc && state->crtc->state->active; | |
1664 | } | |
1665 | ||
c2fcd274 DV |
1666 | /** |
1667 | * drm_atomic_helper_commit_planes - commit plane state | |
1668 | * @dev: DRM device | |
b0fcfc89 | 1669 | * @old_state: atomic state object with old state structures |
2b58e98d | 1670 | * @flags: flags for committing plane state |
c2fcd274 DV |
1671 | * |
1672 | * This function commits the new plane state using the plane and atomic helper | |
1673 | * functions for planes and crtcs. It assumes that the atomic state has already | |
1674 | * been pushed into the relevant object state pointers, since this step can no | |
1675 | * longer fail. | |
1676 | * | |
b0fcfc89 | 1677 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 | 1678 | * crtcs need to be updated though. |
de28d021 ML |
1679 | * |
1680 | * Note that this function does all plane updates across all CRTCs in one step. | |
1681 | * If the hardware can't support this approach look at | |
1682 | * drm_atomic_helper_commit_planes_on_crtc() instead. | |
6e48ae32 DV |
1683 | * |
1684 | * Plane parameters can be updated by applications while the associated CRTC is | |
1685 | * disabled. The DRM/KMS core will store the parameters in the plane state, | |
1686 | * which will be available to the driver when the CRTC is turned on. As a result | |
1687 | * most drivers don't need to be immediately notified of plane updates for a | |
1688 | * disabled CRTC. | |
1689 | * | |
2b58e98d LY |
1690 | * Unless otherwise needed, drivers are advised to set the ACTIVE_ONLY flag in |
1691 | * @flags in order not to receive plane update notifications related to a | |
1692 | * disabled CRTC. This avoids the need to manually ignore plane updates in | |
6e48ae32 DV |
1693 | * driver code when the driver and/or hardware can't or just don't need to deal |
1694 | * with updates on disabled CRTCs, for example when supporting runtime PM. | |
1695 | * | |
2b58e98d LY |
1696 | * Drivers may set the NO_DISABLE_AFTER_MODESET flag in @flags if the relevant |
1697 | * display controllers require to disable a CRTC's planes when the CRTC is | |
1698 | * disabled. This function would skip the ->atomic_disable call for a plane if | |
1699 | * the CRTC of the old plane state needs a modesetting operation. Of course, | |
1700 | * the drivers need to disable the planes in their CRTC disable callbacks | |
1701 | * since no one else would do that. | |
1702 | * | |
1703 | * The drm_atomic_helper_commit() default implementation doesn't set the | |
1704 | * ACTIVE_ONLY flag to most closely match the behaviour of the legacy helpers. | |
1705 | * This should not be copied blindly by drivers. | |
c2fcd274 DV |
1706 | */ |
1707 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
aef9dbb8 | 1708 | struct drm_atomic_state *old_state, |
2b58e98d | 1709 | uint32_t flags) |
c2fcd274 | 1710 | { |
df63b999 ACO |
1711 | struct drm_crtc *crtc; |
1712 | struct drm_crtc_state *old_crtc_state; | |
1713 | struct drm_plane *plane; | |
1714 | struct drm_plane_state *old_plane_state; | |
c2fcd274 | 1715 | int i; |
2b58e98d LY |
1716 | bool active_only = flags & DRM_PLANE_COMMIT_ACTIVE_ONLY; |
1717 | bool no_disable = flags & DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET; | |
c2fcd274 | 1718 | |
df63b999 | 1719 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1720 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1721 | |
1722 | funcs = crtc->helper_private; | |
1723 | ||
1724 | if (!funcs || !funcs->atomic_begin) | |
1725 | continue; | |
1726 | ||
aef9dbb8 DV |
1727 | if (active_only && !crtc->state->active) |
1728 | continue; | |
1729 | ||
613d2b27 | 1730 | funcs->atomic_begin(crtc, old_crtc_state); |
c2fcd274 DV |
1731 | } |
1732 | ||
df63b999 | 1733 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
b5ceff20 | 1734 | const struct drm_plane_helper_funcs *funcs; |
216c59d6 | 1735 | bool disabling; |
c2fcd274 DV |
1736 | |
1737 | funcs = plane->helper_private; | |
1738 | ||
3cad4b68 | 1739 | if (!funcs) |
c2fcd274 DV |
1740 | continue; |
1741 | ||
216c59d6 LP |
1742 | disabling = drm_atomic_plane_disabling(plane, old_plane_state); |
1743 | ||
1744 | if (active_only) { | |
1745 | /* | |
1746 | * Skip planes related to inactive CRTCs. If the plane | |
1747 | * is enabled use the state of the current CRTC. If the | |
1748 | * plane is being disabled use the state of the old | |
1749 | * CRTC to avoid skipping planes being disabled on an | |
1750 | * active CRTC. | |
1751 | */ | |
1752 | if (!disabling && !plane_crtc_active(plane->state)) | |
1753 | continue; | |
1754 | if (disabling && !plane_crtc_active(old_plane_state)) | |
1755 | continue; | |
1756 | } | |
aef9dbb8 | 1757 | |
407b8bd9 TR |
1758 | /* |
1759 | * Special-case disabling the plane if drivers support it. | |
1760 | */ | |
2b58e98d LY |
1761 | if (disabling && funcs->atomic_disable) { |
1762 | struct drm_crtc_state *crtc_state; | |
1763 | ||
1764 | crtc_state = old_plane_state->crtc->state; | |
1765 | ||
1766 | if (drm_atomic_crtc_needs_modeset(crtc_state) && | |
1767 | no_disable) | |
1768 | continue; | |
1769 | ||
407b8bd9 | 1770 | funcs->atomic_disable(plane, old_plane_state); |
2b58e98d | 1771 | } else if (plane->state->crtc || disabling) { |
407b8bd9 | 1772 | funcs->atomic_update(plane, old_plane_state); |
2b58e98d | 1773 | } |
c2fcd274 DV |
1774 | } |
1775 | ||
df63b999 | 1776 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1777 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1778 | |
1779 | funcs = crtc->helper_private; | |
1780 | ||
1781 | if (!funcs || !funcs->atomic_flush) | |
1782 | continue; | |
1783 | ||
aef9dbb8 DV |
1784 | if (active_only && !crtc->state->active) |
1785 | continue; | |
1786 | ||
613d2b27 | 1787 | funcs->atomic_flush(crtc, old_crtc_state); |
c2fcd274 DV |
1788 | } |
1789 | } | |
1790 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1791 | ||
de28d021 ML |
1792 | /** |
1793 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc | |
1794 | * @old_crtc_state: atomic state object with the old crtc state | |
1795 | * | |
1796 | * This function commits the new plane state using the plane and atomic helper | |
1797 | * functions for planes on the specific crtc. It assumes that the atomic state | |
1798 | * has already been pushed into the relevant object state pointers, since this | |
1799 | * step can no longer fail. | |
1800 | * | |
1801 | * This function is useful when plane updates should be done crtc-by-crtc | |
1802 | * instead of one global step like drm_atomic_helper_commit_planes() does. | |
1803 | * | |
1804 | * This function can only be savely used when planes are not allowed to move | |
1805 | * between different CRTCs because this function doesn't handle inter-CRTC | |
1806 | * depencies. Callers need to ensure that either no such depencies exist, | |
1807 | * resolve them through ordering of commit calls or through some other means. | |
1808 | */ | |
1809 | void | |
1810 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) | |
1811 | { | |
1812 | const struct drm_crtc_helper_funcs *crtc_funcs; | |
1813 | struct drm_crtc *crtc = old_crtc_state->crtc; | |
1814 | struct drm_atomic_state *old_state = old_crtc_state->state; | |
1815 | struct drm_plane *plane; | |
1816 | unsigned plane_mask; | |
1817 | ||
1818 | plane_mask = old_crtc_state->plane_mask; | |
1819 | plane_mask |= crtc->state->plane_mask; | |
1820 | ||
1821 | crtc_funcs = crtc->helper_private; | |
1822 | if (crtc_funcs && crtc_funcs->atomic_begin) | |
613d2b27 | 1823 | crtc_funcs->atomic_begin(crtc, old_crtc_state); |
de28d021 ML |
1824 | |
1825 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { | |
1826 | struct drm_plane_state *old_plane_state = | |
1827 | drm_atomic_get_existing_plane_state(old_state, plane); | |
1828 | const struct drm_plane_helper_funcs *plane_funcs; | |
1829 | ||
1830 | plane_funcs = plane->helper_private; | |
1831 | ||
1832 | if (!old_plane_state || !plane_funcs) | |
1833 | continue; | |
1834 | ||
1835 | WARN_ON(plane->state->crtc && plane->state->crtc != crtc); | |
1836 | ||
1837 | if (drm_atomic_plane_disabling(plane, old_plane_state) && | |
1838 | plane_funcs->atomic_disable) | |
1839 | plane_funcs->atomic_disable(plane, old_plane_state); | |
1840 | else if (plane->state->crtc || | |
1841 | drm_atomic_plane_disabling(plane, old_plane_state)) | |
1842 | plane_funcs->atomic_update(plane, old_plane_state); | |
1843 | } | |
1844 | ||
1845 | if (crtc_funcs && crtc_funcs->atomic_flush) | |
613d2b27 | 1846 | crtc_funcs->atomic_flush(crtc, old_crtc_state); |
de28d021 ML |
1847 | } |
1848 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); | |
1849 | ||
6753ba97 JS |
1850 | /** |
1851 | * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes | |
28500291 | 1852 | * @old_crtc_state: atomic state object with the old CRTC state |
6753ba97 JS |
1853 | * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks |
1854 | * | |
1855 | * Disables all planes associated with the given CRTC. This can be | |
28500291 LY |
1856 | * used for instance in the CRTC helper atomic_disable callback to disable |
1857 | * all planes. | |
6753ba97 JS |
1858 | * |
1859 | * If the atomic-parameter is set the function calls the CRTC's | |
1860 | * atomic_begin hook before and atomic_flush hook after disabling the | |
1861 | * planes. | |
1862 | * | |
1863 | * It is a bug to call this function without having implemented the | |
1864 | * ->atomic_disable() plane hook. | |
1865 | */ | |
28500291 LY |
1866 | void |
1867 | drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state, | |
1868 | bool atomic) | |
6753ba97 | 1869 | { |
28500291 | 1870 | struct drm_crtc *crtc = old_crtc_state->crtc; |
6753ba97 JS |
1871 | const struct drm_crtc_helper_funcs *crtc_funcs = |
1872 | crtc->helper_private; | |
1873 | struct drm_plane *plane; | |
1874 | ||
1875 | if (atomic && crtc_funcs && crtc_funcs->atomic_begin) | |
1876 | crtc_funcs->atomic_begin(crtc, NULL); | |
1877 | ||
28500291 | 1878 | drm_atomic_crtc_state_for_each_plane(plane, old_crtc_state) { |
6753ba97 JS |
1879 | const struct drm_plane_helper_funcs *plane_funcs = |
1880 | plane->helper_private; | |
1881 | ||
28500291 | 1882 | if (!plane_funcs) |
6753ba97 JS |
1883 | continue; |
1884 | ||
1885 | WARN_ON(!plane_funcs->atomic_disable); | |
1886 | if (plane_funcs->atomic_disable) | |
1887 | plane_funcs->atomic_disable(plane, NULL); | |
1888 | } | |
1889 | ||
1890 | if (atomic && crtc_funcs && crtc_funcs->atomic_flush) | |
1891 | crtc_funcs->atomic_flush(crtc, NULL); | |
1892 | } | |
1893 | EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); | |
1894 | ||
c2fcd274 DV |
1895 | /** |
1896 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1897 | * @dev: DRM device | |
1898 | * @old_state: atomic state object with old state structures | |
1899 | * | |
1900 | * This function cleans up plane state, specifically framebuffers, from the old | |
1901 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1902 | * be able to call this function. | |
1903 | * | |
1904 | * This function must also be called on the new state when the atomic update | |
1905 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1906 | */ | |
1907 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1908 | struct drm_atomic_state *old_state) | |
1909 | { | |
df63b999 ACO |
1910 | struct drm_plane *plane; |
1911 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
1912 | int i; |
1913 | ||
df63b999 | 1914 | for_each_plane_in_state(old_state, plane, plane_state, i) { |
b5ceff20 | 1915 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1916 | |
c2fcd274 DV |
1917 | funcs = plane->helper_private; |
1918 | ||
844f9111 ML |
1919 | if (funcs->cleanup_fb) |
1920 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1921 | } |
1922 | } | |
1923 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1924 | ||
1925 | /** | |
1926 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
c2fcd274 | 1927 | * @state: atomic state |
5e84c269 | 1928 | * @stall: stall for proceeding commits |
c2fcd274 DV |
1929 | * |
1930 | * This function stores the atomic state into the current state pointers in all | |
1931 | * driver objects. It should be called after all failing steps have been done | |
1932 | * and succeeded, but before the actual hardware state is committed. | |
1933 | * | |
1934 | * For cleanup and error recovery the current state for all changed objects will | |
1935 | * be swaped into @state. | |
1936 | * | |
1937 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1938 | * | |
1939 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1940 | * | |
1941 | * 2. Do any other steps that might fail. | |
1942 | * | |
1943 | * 3. Put the staged state into the current state pointers with this function. | |
1944 | * | |
1945 | * 4. Actually commit the hardware state. | |
1946 | * | |
26196f7e | 1947 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
c2fcd274 | 1948 | * contains the old state. Also do any other cleanup required with that state. |
a095caa7 DV |
1949 | * |
1950 | * @stall must be set when nonblocking commits for this driver directly access | |
1951 | * the ->state pointer of &drm_plane, &drm_crtc or &drm_connector. With the | |
1952 | * current atomic helpers this is almost always the case, since the helpers | |
1953 | * don't pass the right state structures to the callbacks. | |
c2fcd274 | 1954 | */ |
5e84c269 DV |
1955 | void drm_atomic_helper_swap_state(struct drm_atomic_state *state, |
1956 | bool stall) | |
c2fcd274 DV |
1957 | { |
1958 | int i; | |
a095caa7 | 1959 | long ret; |
be9174a4 DV |
1960 | struct drm_connector *connector; |
1961 | struct drm_connector_state *conn_state; | |
1962 | struct drm_crtc *crtc; | |
1963 | struct drm_crtc_state *crtc_state; | |
1964 | struct drm_plane *plane; | |
1965 | struct drm_plane_state *plane_state; | |
a095caa7 DV |
1966 | struct drm_crtc_commit *commit; |
1967 | ||
1968 | if (stall) { | |
1969 | for_each_crtc_in_state(state, crtc, crtc_state, i) { | |
1970 | spin_lock(&crtc->commit_lock); | |
1971 | commit = list_first_entry_or_null(&crtc->commit_list, | |
1972 | struct drm_crtc_commit, commit_entry); | |
1973 | if (commit) | |
1974 | drm_crtc_commit_get(commit); | |
1975 | spin_unlock(&crtc->commit_lock); | |
1976 | ||
1977 | if (!commit) | |
1978 | continue; | |
1979 | ||
1980 | ret = wait_for_completion_timeout(&commit->hw_done, | |
1981 | 10*HZ); | |
1982 | if (ret == 0) | |
1983 | DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n", | |
1984 | crtc->base.id, crtc->name); | |
1985 | drm_crtc_commit_put(commit); | |
1986 | } | |
1987 | } | |
c2fcd274 | 1988 | |
be9174a4 | 1989 | for_each_connector_in_state(state, connector, conn_state, i) { |
c2fcd274 | 1990 | connector->state->state = state; |
63e83c1d | 1991 | swap(state->connectors[i].state, connector->state); |
c2fcd274 DV |
1992 | connector->state->state = NULL; |
1993 | } | |
1994 | ||
be9174a4 | 1995 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
c2fcd274 | 1996 | crtc->state->state = state; |
5d943aa6 | 1997 | swap(state->crtcs[i].state, crtc->state); |
c2fcd274 | 1998 | crtc->state->state = NULL; |
a095caa7 DV |
1999 | |
2000 | if (state->crtcs[i].commit) { | |
2001 | spin_lock(&crtc->commit_lock); | |
2002 | list_add(&state->crtcs[i].commit->commit_entry, | |
2003 | &crtc->commit_list); | |
2004 | spin_unlock(&crtc->commit_lock); | |
2005 | ||
2006 | state->crtcs[i].commit->event = NULL; | |
2007 | } | |
c2fcd274 DV |
2008 | } |
2009 | ||
be9174a4 | 2010 | for_each_plane_in_state(state, plane, plane_state, i) { |
c2fcd274 | 2011 | plane->state->state = state; |
b8b5342b | 2012 | swap(state->planes[i].state, plane->state); |
c2fcd274 DV |
2013 | plane->state->state = NULL; |
2014 | } | |
2015 | } | |
2016 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
2017 | |
2018 | /** | |
2019 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
2020 | * @plane: plane object to update | |
2021 | * @crtc: owning CRTC of owning plane | |
2022 | * @fb: framebuffer to flip onto plane | |
2023 | * @crtc_x: x offset of primary plane on crtc | |
2024 | * @crtc_y: y offset of primary plane on crtc | |
2025 | * @crtc_w: width of primary plane rectangle on crtc | |
2026 | * @crtc_h: height of primary plane rectangle on crtc | |
2027 | * @src_x: x offset of @fb for panning | |
2028 | * @src_y: y offset of @fb for panning | |
2029 | * @src_w: width of source rectangle in @fb | |
2030 | * @src_h: height of source rectangle in @fb | |
2031 | * | |
2032 | * Provides a default plane update handler using the atomic driver interface. | |
2033 | * | |
2034 | * RETURNS: | |
2035 | * Zero on success, error code on failure | |
2036 | */ | |
2037 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
2038 | struct drm_crtc *crtc, | |
2039 | struct drm_framebuffer *fb, | |
2040 | int crtc_x, int crtc_y, | |
2041 | unsigned int crtc_w, unsigned int crtc_h, | |
2042 | uint32_t src_x, uint32_t src_y, | |
2043 | uint32_t src_w, uint32_t src_h) | |
2044 | { | |
2045 | struct drm_atomic_state *state; | |
2046 | struct drm_plane_state *plane_state; | |
2047 | int ret = 0; | |
2048 | ||
2049 | state = drm_atomic_state_alloc(plane->dev); | |
2050 | if (!state) | |
2051 | return -ENOMEM; | |
2052 | ||
2053 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2054 | retry: | |
2055 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2056 | if (IS_ERR(plane_state)) { | |
2057 | ret = PTR_ERR(plane_state); | |
2058 | goto fail; | |
2059 | } | |
2060 | ||
07cc0ef6 | 2061 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
2062 | if (ret != 0) |
2063 | goto fail; | |
321ebf04 | 2064 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
2065 | plane_state->crtc_x = crtc_x; |
2066 | plane_state->crtc_y = crtc_y; | |
042652ed | 2067 | plane_state->crtc_w = crtc_w; |
02e6f379 | 2068 | plane_state->crtc_h = crtc_h; |
042652ed DV |
2069 | plane_state->src_x = src_x; |
2070 | plane_state->src_y = src_y; | |
042652ed | 2071 | plane_state->src_w = src_w; |
02e6f379 | 2072 | plane_state->src_h = src_h; |
042652ed | 2073 | |
3671c580 DV |
2074 | if (plane == crtc->cursor) |
2075 | state->legacy_cursor_update = true; | |
2076 | ||
042652ed | 2077 | ret = drm_atomic_commit(state); |
042652ed DV |
2078 | fail: |
2079 | if (ret == -EDEADLK) | |
2080 | goto backoff; | |
2081 | ||
0853695c | 2082 | drm_atomic_state_put(state); |
042652ed | 2083 | return ret; |
0853695c | 2084 | |
042652ed | 2085 | backoff: |
042652ed | 2086 | drm_atomic_state_clear(state); |
6f75cea6 | 2087 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2088 | |
2089 | /* | |
2090 | * Someone might have exchanged the framebuffer while we dropped locks | |
2091 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2092 | * core does for us. | |
2093 | */ | |
2094 | plane->old_fb = plane->fb; | |
2095 | ||
2096 | goto retry; | |
2097 | } | |
2098 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
2099 | ||
2100 | /** | |
2101 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
2102 | * @plane: plane to disable | |
2103 | * | |
2104 | * Provides a default plane disable handler using the atomic driver interface. | |
2105 | * | |
2106 | * RETURNS: | |
2107 | * Zero on success, error code on failure | |
2108 | */ | |
2109 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
2110 | { | |
2111 | struct drm_atomic_state *state; | |
2112 | struct drm_plane_state *plane_state; | |
2113 | int ret = 0; | |
2114 | ||
aa54e2ee JSP |
2115 | /* |
2116 | * FIXME: Without plane->crtc set we can't get at the implicit legacy | |
2117 | * acquire context. The real fix will be to wire the acquire ctx through | |
2118 | * everywhere we need it, but meanwhile prevent chaos by just skipping | |
2119 | * this noop. The critical case is the cursor ioctls which a) only grab | |
2120 | * crtc/cursor-plane locks (so we need the crtc to get at the right | |
2121 | * acquire context) and b) can try to disable the plane multiple times. | |
2122 | */ | |
2123 | if (!plane->crtc) | |
2124 | return 0; | |
2125 | ||
042652ed DV |
2126 | state = drm_atomic_state_alloc(plane->dev); |
2127 | if (!state) | |
2128 | return -ENOMEM; | |
2129 | ||
2130 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
2131 | retry: | |
2132 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2133 | if (IS_ERR(plane_state)) { | |
2134 | ret = PTR_ERR(plane_state); | |
2135 | goto fail; | |
2136 | } | |
2137 | ||
24e79d0d ML |
2138 | if (plane_state->crtc && (plane == plane->crtc->cursor)) |
2139 | plane_state->state->legacy_cursor_update = true; | |
2140 | ||
bbb1e524 | 2141 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
042652ed DV |
2142 | if (ret != 0) |
2143 | goto fail; | |
f02ad907 | 2144 | |
042652ed | 2145 | ret = drm_atomic_commit(state); |
042652ed DV |
2146 | fail: |
2147 | if (ret == -EDEADLK) | |
2148 | goto backoff; | |
2149 | ||
0853695c | 2150 | drm_atomic_state_put(state); |
042652ed | 2151 | return ret; |
0853695c | 2152 | |
042652ed | 2153 | backoff: |
042652ed | 2154 | drm_atomic_state_clear(state); |
6f75cea6 | 2155 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2156 | |
2157 | /* | |
2158 | * Someone might have exchanged the framebuffer while we dropped locks | |
2159 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2160 | * core does for us. | |
2161 | */ | |
2162 | plane->old_fb = plane->fb; | |
2163 | ||
2164 | goto retry; | |
2165 | } | |
2166 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
2167 | ||
bbb1e524 RC |
2168 | /* just used from fb-helper and atomic-helper: */ |
2169 | int __drm_atomic_helper_disable_plane(struct drm_plane *plane, | |
2170 | struct drm_plane_state *plane_state) | |
2171 | { | |
2172 | int ret; | |
2173 | ||
2174 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
2175 | if (ret != 0) | |
2176 | return ret; | |
2177 | ||
2178 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
2179 | plane_state->crtc_x = 0; | |
2180 | plane_state->crtc_y = 0; | |
bbb1e524 | 2181 | plane_state->crtc_w = 0; |
02e6f379 | 2182 | plane_state->crtc_h = 0; |
bbb1e524 RC |
2183 | plane_state->src_x = 0; |
2184 | plane_state->src_y = 0; | |
bbb1e524 | 2185 | plane_state->src_w = 0; |
02e6f379 | 2186 | plane_state->src_h = 0; |
bbb1e524 | 2187 | |
bbb1e524 RC |
2188 | return 0; |
2189 | } | |
2190 | ||
042652ed DV |
2191 | static int update_output_state(struct drm_atomic_state *state, |
2192 | struct drm_mode_set *set) | |
2193 | { | |
2194 | struct drm_device *dev = set->crtc->dev; | |
df63b999 ACO |
2195 | struct drm_crtc *crtc; |
2196 | struct drm_crtc_state *crtc_state; | |
2197 | struct drm_connector *connector; | |
042652ed | 2198 | struct drm_connector_state *conn_state; |
6ab520a2 | 2199 | int ret, i; |
042652ed DV |
2200 | |
2201 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
2202 | state->acquire_ctx); | |
2203 | if (ret) | |
2204 | return ret; | |
2205 | ||
6ab520a2 ML |
2206 | /* First disable all connectors on the target crtc. */ |
2207 | ret = drm_atomic_add_affected_connectors(state, set->crtc); | |
2208 | if (ret) | |
2209 | return ret; | |
042652ed | 2210 | |
df63b999 | 2211 | for_each_connector_in_state(state, connector, conn_state, i) { |
042652ed DV |
2212 | if (conn_state->crtc == set->crtc) { |
2213 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
2214 | NULL); | |
2215 | if (ret) | |
2216 | return ret; | |
2217 | } | |
6ab520a2 | 2218 | } |
042652ed | 2219 | |
6ab520a2 ML |
2220 | /* Then set all connectors from set->connectors on the target crtc */ |
2221 | for (i = 0; i < set->num_connectors; i++) { | |
2222 | conn_state = drm_atomic_get_connector_state(state, | |
2223 | set->connectors[i]); | |
2224 | if (IS_ERR(conn_state)) | |
2225 | return PTR_ERR(conn_state); | |
2226 | ||
2227 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
2228 | set->crtc); | |
2229 | if (ret) | |
2230 | return ret; | |
042652ed DV |
2231 | } |
2232 | ||
df63b999 | 2233 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
2234 | /* Don't update ->enable for the CRTC in the set_config request, |
2235 | * since a mismatch would indicate a bug in the upper layers. | |
2236 | * The actual modeset code later on will catch any | |
2237 | * inconsistencies here. */ | |
2238 | if (crtc == set->crtc) | |
2239 | continue; | |
2240 | ||
14de6c44 | 2241 | if (!crtc_state->connector_mask) { |
c30f55a7 LP |
2242 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, |
2243 | NULL); | |
2244 | if (ret < 0) | |
2245 | return ret; | |
2246 | ||
9b5edbf7 | 2247 | crtc_state->active = false; |
c30f55a7 | 2248 | } |
042652ed DV |
2249 | } |
2250 | ||
2251 | return 0; | |
2252 | } | |
2253 | ||
2254 | /** | |
2255 | * drm_atomic_helper_set_config - set a new config from userspace | |
2256 | * @set: mode set configuration | |
2257 | * | |
2258 | * Provides a default crtc set_config handler using the atomic driver interface. | |
2259 | * | |
2260 | * Returns: | |
2261 | * Returns 0 on success, negative errno numbers on failure. | |
2262 | */ | |
2263 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
2264 | { | |
2265 | struct drm_atomic_state *state; | |
2266 | struct drm_crtc *crtc = set->crtc; | |
042652ed DV |
2267 | int ret = 0; |
2268 | ||
2269 | state = drm_atomic_state_alloc(crtc->dev); | |
2270 | if (!state) | |
2271 | return -ENOMEM; | |
2272 | ||
40616a26 | 2273 | state->legacy_set_config = true; |
042652ed DV |
2274 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); |
2275 | retry: | |
bbb1e524 RC |
2276 | ret = __drm_atomic_helper_set_config(set, state); |
2277 | if (ret != 0) | |
042652ed | 2278 | goto fail; |
042652ed | 2279 | |
bbb1e524 | 2280 | ret = drm_atomic_commit(state); |
bbb1e524 RC |
2281 | fail: |
2282 | if (ret == -EDEADLK) | |
2283 | goto backoff; | |
2284 | ||
0853695c | 2285 | drm_atomic_state_put(state); |
bbb1e524 | 2286 | return ret; |
0853695c | 2287 | |
bbb1e524 RC |
2288 | backoff: |
2289 | drm_atomic_state_clear(state); | |
2290 | drm_atomic_legacy_backoff(state); | |
2291 | ||
2292 | /* | |
2293 | * Someone might have exchanged the framebuffer while we dropped locks | |
2294 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2295 | * core does for us. | |
2296 | */ | |
2297 | crtc->primary->old_fb = crtc->primary->fb; | |
2298 | ||
2299 | goto retry; | |
2300 | } | |
2301 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
2302 | ||
2303 | /* just used from fb-helper and atomic-helper: */ | |
2304 | int __drm_atomic_helper_set_config(struct drm_mode_set *set, | |
2305 | struct drm_atomic_state *state) | |
2306 | { | |
2307 | struct drm_crtc_state *crtc_state; | |
2308 | struct drm_plane_state *primary_state; | |
2309 | struct drm_crtc *crtc = set->crtc; | |
83926117 | 2310 | int hdisplay, vdisplay; |
bbb1e524 RC |
2311 | int ret; |
2312 | ||
2313 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2314 | if (IS_ERR(crtc_state)) | |
2315 | return PTR_ERR(crtc_state); | |
2316 | ||
2317 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); | |
2318 | if (IS_ERR(primary_state)) | |
2319 | return PTR_ERR(primary_state); | |
e5b5341c | 2320 | |
042652ed DV |
2321 | if (!set->mode) { |
2322 | WARN_ON(set->fb); | |
2323 | WARN_ON(set->num_connectors); | |
2324 | ||
819364da DS |
2325 | ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); |
2326 | if (ret != 0) | |
bbb1e524 | 2327 | return ret; |
819364da | 2328 | |
eab3bbef | 2329 | crtc_state->active = false; |
e5b5341c | 2330 | |
07cc0ef6 | 2331 | ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
e5b5341c | 2332 | if (ret != 0) |
bbb1e524 | 2333 | return ret; |
e5b5341c RC |
2334 | |
2335 | drm_atomic_set_fb_for_plane(primary_state, NULL); | |
2336 | ||
042652ed DV |
2337 | goto commit; |
2338 | } | |
2339 | ||
2340 | WARN_ON(!set->fb); | |
2341 | WARN_ON(!set->num_connectors); | |
2342 | ||
819364da DS |
2343 | ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); |
2344 | if (ret != 0) | |
bbb1e524 | 2345 | return ret; |
819364da | 2346 | |
eab3bbef | 2347 | crtc_state->active = true; |
042652ed | 2348 | |
07cc0ef6 | 2349 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
042652ed | 2350 | if (ret != 0) |
bbb1e524 RC |
2351 | return ret; |
2352 | ||
83926117 VS |
2353 | drm_crtc_get_hv_timing(set->mode, &hdisplay, &vdisplay); |
2354 | ||
321ebf04 | 2355 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
042652ed DV |
2356 | primary_state->crtc_x = 0; |
2357 | primary_state->crtc_y = 0; | |
83926117 | 2358 | primary_state->crtc_w = hdisplay; |
02e6f379 | 2359 | primary_state->crtc_h = vdisplay; |
042652ed DV |
2360 | primary_state->src_x = set->x << 16; |
2361 | primary_state->src_y = set->y << 16; | |
bd2ef25d | 2362 | if (drm_rotation_90_or_270(primary_state->rotation)) { |
83926117 | 2363 | primary_state->src_w = vdisplay << 16; |
02e6f379 | 2364 | primary_state->src_h = hdisplay << 16; |
41121248 | 2365 | } else { |
83926117 | 2366 | primary_state->src_w = hdisplay << 16; |
02e6f379 | 2367 | primary_state->src_h = vdisplay << 16; |
41121248 | 2368 | } |
042652ed DV |
2369 | |
2370 | commit: | |
2371 | ret = update_output_state(state, set); | |
2372 | if (ret) | |
bbb1e524 | 2373 | return ret; |
042652ed | 2374 | |
042652ed | 2375 | return 0; |
042652ed | 2376 | } |
042652ed | 2377 | |
14942760 TR |
2378 | /** |
2379 | * drm_atomic_helper_disable_all - disable all currently active outputs | |
2380 | * @dev: DRM device | |
2381 | * @ctx: lock acquisition context | |
2382 | * | |
2383 | * Loops through all connectors, finding those that aren't turned off and then | |
2384 | * turns them off by setting their DPMS mode to OFF and deactivating the CRTC | |
2385 | * that they are connected to. | |
2386 | * | |
2387 | * This is used for example in suspend/resume to disable all currently active | |
2388 | * functions when suspending. | |
2389 | * | |
2390 | * Note that if callers haven't already acquired all modeset locks this might | |
2391 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
2392 | * | |
2393 | * Returns: | |
2394 | * 0 on success or a negative error code on failure. | |
2395 | * | |
2396 | * See also: | |
2397 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
2398 | */ | |
2399 | int drm_atomic_helper_disable_all(struct drm_device *dev, | |
2400 | struct drm_modeset_acquire_ctx *ctx) | |
2401 | { | |
2402 | struct drm_atomic_state *state; | |
2403 | struct drm_connector *conn; | |
c36a3254 | 2404 | struct drm_connector_list_iter conn_iter; |
14942760 TR |
2405 | int err; |
2406 | ||
2407 | state = drm_atomic_state_alloc(dev); | |
2408 | if (!state) | |
2409 | return -ENOMEM; | |
2410 | ||
2411 | state->acquire_ctx = ctx; | |
2412 | ||
c36a3254 DV |
2413 | drm_connector_list_iter_get(dev, &conn_iter); |
2414 | drm_for_each_connector_iter(conn, &conn_iter) { | |
14942760 TR |
2415 | struct drm_crtc *crtc = conn->state->crtc; |
2416 | struct drm_crtc_state *crtc_state; | |
2417 | ||
2418 | if (!crtc || conn->dpms != DRM_MODE_DPMS_ON) | |
2419 | continue; | |
2420 | ||
2421 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2422 | if (IS_ERR(crtc_state)) { | |
2423 | err = PTR_ERR(crtc_state); | |
2424 | goto free; | |
2425 | } | |
2426 | ||
2427 | crtc_state->active = false; | |
2428 | } | |
2429 | ||
2430 | err = drm_atomic_commit(state); | |
14942760 | 2431 | free: |
c36a3254 | 2432 | drm_connector_list_iter_put(&conn_iter); |
0853695c | 2433 | drm_atomic_state_put(state); |
14942760 TR |
2434 | return err; |
2435 | } | |
2436 | EXPORT_SYMBOL(drm_atomic_helper_disable_all); | |
2437 | ||
2438 | /** | |
2439 | * drm_atomic_helper_suspend - subsystem-level suspend helper | |
2440 | * @dev: DRM device | |
2441 | * | |
2442 | * Duplicates the current atomic state, disables all active outputs and then | |
2443 | * returns a pointer to the original atomic state to the caller. Drivers can | |
2444 | * pass this pointer to the drm_atomic_helper_resume() helper upon resume to | |
2445 | * restore the output configuration that was active at the time the system | |
2446 | * entered suspend. | |
2447 | * | |
2448 | * Note that it is potentially unsafe to use this. The atomic state object | |
2449 | * returned by this function is assumed to be persistent. Drivers must ensure | |
2450 | * that this holds true. Before calling this function, drivers must make sure | |
2451 | * to suspend fbdev emulation so that nothing can be using the device. | |
2452 | * | |
2453 | * Returns: | |
2454 | * A pointer to a copy of the state before suspend on success or an ERR_PTR()- | |
2455 | * encoded error code on failure. Drivers should store the returned atomic | |
2456 | * state object and pass it to the drm_atomic_helper_resume() helper upon | |
2457 | * resume. | |
2458 | * | |
2459 | * See also: | |
2460 | * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), | |
2461 | * drm_atomic_helper_resume() | |
2462 | */ | |
2463 | struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) | |
2464 | { | |
2465 | struct drm_modeset_acquire_ctx ctx; | |
2466 | struct drm_atomic_state *state; | |
2467 | int err; | |
2468 | ||
2469 | drm_modeset_acquire_init(&ctx, 0); | |
2470 | ||
2471 | retry: | |
2472 | err = drm_modeset_lock_all_ctx(dev, &ctx); | |
2473 | if (err < 0) { | |
2474 | state = ERR_PTR(err); | |
2475 | goto unlock; | |
2476 | } | |
2477 | ||
2478 | state = drm_atomic_helper_duplicate_state(dev, &ctx); | |
2479 | if (IS_ERR(state)) | |
2480 | goto unlock; | |
2481 | ||
2482 | err = drm_atomic_helper_disable_all(dev, &ctx); | |
2483 | if (err < 0) { | |
0853695c | 2484 | drm_atomic_state_put(state); |
14942760 TR |
2485 | state = ERR_PTR(err); |
2486 | goto unlock; | |
2487 | } | |
2488 | ||
2489 | unlock: | |
2490 | if (PTR_ERR(state) == -EDEADLK) { | |
2491 | drm_modeset_backoff(&ctx); | |
2492 | goto retry; | |
2493 | } | |
2494 | ||
2495 | drm_modeset_drop_locks(&ctx); | |
2496 | drm_modeset_acquire_fini(&ctx); | |
2497 | return state; | |
2498 | } | |
2499 | EXPORT_SYMBOL(drm_atomic_helper_suspend); | |
2500 | ||
2501 | /** | |
2502 | * drm_atomic_helper_resume - subsystem-level resume helper | |
2503 | * @dev: DRM device | |
2504 | * @state: atomic state to resume to | |
2505 | * | |
2506 | * Calls drm_mode_config_reset() to synchronize hardware and software states, | |
2507 | * grabs all modeset locks and commits the atomic state object. This can be | |
2508 | * used in conjunction with the drm_atomic_helper_suspend() helper to | |
2509 | * implement suspend/resume for drivers that support atomic mode-setting. | |
2510 | * | |
2511 | * Returns: | |
2512 | * 0 on success or a negative error code on failure. | |
2513 | * | |
2514 | * See also: | |
2515 | * drm_atomic_helper_suspend() | |
2516 | */ | |
2517 | int drm_atomic_helper_resume(struct drm_device *dev, | |
2518 | struct drm_atomic_state *state) | |
2519 | { | |
2520 | struct drm_mode_config *config = &dev->mode_config; | |
2521 | int err; | |
2522 | ||
2523 | drm_mode_config_reset(dev); | |
2524 | drm_modeset_lock_all(dev); | |
2525 | state->acquire_ctx = config->acquire_ctx; | |
2526 | err = drm_atomic_commit(state); | |
2527 | drm_modeset_unlock_all(dev); | |
2528 | ||
2529 | return err; | |
2530 | } | |
2531 | EXPORT_SYMBOL(drm_atomic_helper_resume); | |
2532 | ||
042652ed | 2533 | /** |
7f50002f | 2534 | * drm_atomic_helper_crtc_set_property - helper for crtc properties |
042652ed DV |
2535 | * @crtc: DRM crtc |
2536 | * @property: DRM property | |
2537 | * @val: value of property | |
2538 | * | |
7f50002f LP |
2539 | * Provides a default crtc set_property handler using the atomic driver |
2540 | * interface. | |
042652ed DV |
2541 | * |
2542 | * RETURNS: | |
2543 | * Zero on success, error code on failure | |
2544 | */ | |
2545 | int | |
2546 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
2547 | struct drm_property *property, | |
2548 | uint64_t val) | |
2549 | { | |
2550 | struct drm_atomic_state *state; | |
2551 | struct drm_crtc_state *crtc_state; | |
2552 | int ret = 0; | |
2553 | ||
2554 | state = drm_atomic_state_alloc(crtc->dev); | |
2555 | if (!state) | |
2556 | return -ENOMEM; | |
2557 | ||
2558 | /* ->set_property is always called with all locks held. */ | |
2559 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
2560 | retry: | |
2561 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2562 | if (IS_ERR(crtc_state)) { | |
2563 | ret = PTR_ERR(crtc_state); | |
2564 | goto fail; | |
2565 | } | |
2566 | ||
40ecc694 RC |
2567 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
2568 | property, val); | |
042652ed DV |
2569 | if (ret) |
2570 | goto fail; | |
2571 | ||
2572 | ret = drm_atomic_commit(state); | |
042652ed DV |
2573 | fail: |
2574 | if (ret == -EDEADLK) | |
2575 | goto backoff; | |
2576 | ||
0853695c | 2577 | drm_atomic_state_put(state); |
042652ed | 2578 | return ret; |
0853695c | 2579 | |
042652ed | 2580 | backoff: |
042652ed | 2581 | drm_atomic_state_clear(state); |
6f75cea6 | 2582 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2583 | |
2584 | goto retry; | |
2585 | } | |
2586 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
2587 | ||
2588 | /** | |
7f50002f | 2589 | * drm_atomic_helper_plane_set_property - helper for plane properties |
042652ed DV |
2590 | * @plane: DRM plane |
2591 | * @property: DRM property | |
2592 | * @val: value of property | |
2593 | * | |
7f50002f LP |
2594 | * Provides a default plane set_property handler using the atomic driver |
2595 | * interface. | |
042652ed DV |
2596 | * |
2597 | * RETURNS: | |
2598 | * Zero on success, error code on failure | |
2599 | */ | |
2600 | int | |
2601 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
2602 | struct drm_property *property, | |
2603 | uint64_t val) | |
2604 | { | |
2605 | struct drm_atomic_state *state; | |
2606 | struct drm_plane_state *plane_state; | |
2607 | int ret = 0; | |
2608 | ||
2609 | state = drm_atomic_state_alloc(plane->dev); | |
2610 | if (!state) | |
2611 | return -ENOMEM; | |
2612 | ||
2613 | /* ->set_property is always called with all locks held. */ | |
2614 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
2615 | retry: | |
2616 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2617 | if (IS_ERR(plane_state)) { | |
2618 | ret = PTR_ERR(plane_state); | |
2619 | goto fail; | |
2620 | } | |
2621 | ||
40ecc694 RC |
2622 | ret = drm_atomic_plane_set_property(plane, plane_state, |
2623 | property, val); | |
042652ed DV |
2624 | if (ret) |
2625 | goto fail; | |
2626 | ||
2627 | ret = drm_atomic_commit(state); | |
042652ed DV |
2628 | fail: |
2629 | if (ret == -EDEADLK) | |
2630 | goto backoff; | |
2631 | ||
0853695c | 2632 | drm_atomic_state_put(state); |
042652ed | 2633 | return ret; |
0853695c | 2634 | |
042652ed | 2635 | backoff: |
042652ed | 2636 | drm_atomic_state_clear(state); |
6f75cea6 | 2637 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2638 | |
2639 | goto retry; | |
2640 | } | |
2641 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
2642 | ||
2643 | /** | |
7f50002f | 2644 | * drm_atomic_helper_connector_set_property - helper for connector properties |
042652ed DV |
2645 | * @connector: DRM connector |
2646 | * @property: DRM property | |
2647 | * @val: value of property | |
2648 | * | |
7f50002f LP |
2649 | * Provides a default connector set_property handler using the atomic driver |
2650 | * interface. | |
042652ed DV |
2651 | * |
2652 | * RETURNS: | |
2653 | * Zero on success, error code on failure | |
2654 | */ | |
2655 | int | |
2656 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
2657 | struct drm_property *property, | |
2658 | uint64_t val) | |
2659 | { | |
2660 | struct drm_atomic_state *state; | |
2661 | struct drm_connector_state *connector_state; | |
2662 | int ret = 0; | |
2663 | ||
2664 | state = drm_atomic_state_alloc(connector->dev); | |
2665 | if (!state) | |
2666 | return -ENOMEM; | |
2667 | ||
2668 | /* ->set_property is always called with all locks held. */ | |
2669 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
2670 | retry: | |
2671 | connector_state = drm_atomic_get_connector_state(state, connector); | |
2672 | if (IS_ERR(connector_state)) { | |
2673 | ret = PTR_ERR(connector_state); | |
2674 | goto fail; | |
2675 | } | |
2676 | ||
40ecc694 RC |
2677 | ret = drm_atomic_connector_set_property(connector, connector_state, |
2678 | property, val); | |
042652ed DV |
2679 | if (ret) |
2680 | goto fail; | |
2681 | ||
2682 | ret = drm_atomic_commit(state); | |
042652ed DV |
2683 | fail: |
2684 | if (ret == -EDEADLK) | |
2685 | goto backoff; | |
2686 | ||
0853695c | 2687 | drm_atomic_state_put(state); |
042652ed | 2688 | return ret; |
0853695c | 2689 | |
042652ed | 2690 | backoff: |
042652ed | 2691 | drm_atomic_state_clear(state); |
6f75cea6 | 2692 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2693 | |
2694 | goto retry; | |
2695 | } | |
2696 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 DV |
2697 | |
2698 | /** | |
2699 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
2700 | * @crtc: DRM crtc | |
2701 | * @fb: DRM framebuffer | |
2702 | * @event: optional DRM event to signal upon completion | |
2703 | * @flags: flip flags for non-vblank sync'ed updates | |
2704 | * | |
2705 | * Provides a default page flip implementation using the atomic driver interface. | |
2706 | * | |
2707 | * Note that for now so called async page flips (i.e. updates which are not | |
2708 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
2709 | * no provisions for this yet. | |
2710 | * | |
2711 | * Returns: | |
2712 | * Returns 0 on success, negative errno numbers on failure. | |
2713 | */ | |
2714 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
2715 | struct drm_framebuffer *fb, | |
2716 | struct drm_pending_vblank_event *event, | |
2717 | uint32_t flags) | |
2718 | { | |
2719 | struct drm_plane *plane = crtc->primary; | |
2720 | struct drm_atomic_state *state; | |
2721 | struct drm_plane_state *plane_state; | |
2722 | struct drm_crtc_state *crtc_state; | |
2723 | int ret = 0; | |
2724 | ||
2725 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
2726 | return -EINVAL; | |
2727 | ||
2728 | state = drm_atomic_state_alloc(plane->dev); | |
2729 | if (!state) | |
2730 | return -ENOMEM; | |
2731 | ||
2732 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2733 | retry: | |
2734 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2735 | if (IS_ERR(crtc_state)) { | |
2736 | ret = PTR_ERR(crtc_state); | |
2737 | goto fail; | |
2738 | } | |
2739 | crtc_state->event = event; | |
2740 | ||
2741 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2742 | if (IS_ERR(plane_state)) { | |
2743 | ret = PTR_ERR(plane_state); | |
2744 | goto fail; | |
2745 | } | |
2746 | ||
07cc0ef6 | 2747 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
8bc0f312 DV |
2748 | if (ret != 0) |
2749 | goto fail; | |
321ebf04 | 2750 | drm_atomic_set_fb_for_plane(plane_state, fb); |
8bc0f312 | 2751 | |
4cba6850 DV |
2752 | /* Make sure we don't accidentally do a full modeset. */ |
2753 | state->allow_modeset = false; | |
2754 | if (!crtc_state->active) { | |
2755 | DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n", | |
2756 | crtc->base.id); | |
2757 | ret = -EINVAL; | |
2758 | goto fail; | |
2759 | } | |
2760 | ||
b837ba0a | 2761 | ret = drm_atomic_nonblocking_commit(state); |
8bc0f312 DV |
2762 | fail: |
2763 | if (ret == -EDEADLK) | |
2764 | goto backoff; | |
2765 | ||
0853695c | 2766 | drm_atomic_state_put(state); |
8bc0f312 | 2767 | return ret; |
0853695c | 2768 | |
8bc0f312 | 2769 | backoff: |
8bc0f312 | 2770 | drm_atomic_state_clear(state); |
6f75cea6 | 2771 | drm_atomic_legacy_backoff(state); |
8bc0f312 DV |
2772 | |
2773 | /* | |
2774 | * Someone might have exchanged the framebuffer while we dropped locks | |
2775 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2776 | * core does for us. | |
2777 | */ | |
2778 | plane->old_fb = plane->fb; | |
2779 | ||
2780 | goto retry; | |
2781 | } | |
2782 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
d461701c | 2783 | |
b486e0e6 DV |
2784 | /** |
2785 | * drm_atomic_helper_connector_dpms() - connector dpms helper implementation | |
2786 | * @connector: affected connector | |
2787 | * @mode: DPMS mode | |
2788 | * | |
2789 | * This is the main helper function provided by the atomic helper framework for | |
2790 | * implementing the legacy DPMS connector interface. It computes the new desired | |
2791 | * ->active state for the corresponding CRTC (if the connector is enabled) and | |
2e7a5701 | 2792 | * updates it. |
9a69a9ac ML |
2793 | * |
2794 | * Returns: | |
2795 | * Returns 0 on success, negative errno numbers on failure. | |
b486e0e6 | 2796 | */ |
9a69a9ac ML |
2797 | int drm_atomic_helper_connector_dpms(struct drm_connector *connector, |
2798 | int mode) | |
b486e0e6 DV |
2799 | { |
2800 | struct drm_mode_config *config = &connector->dev->mode_config; | |
2801 | struct drm_atomic_state *state; | |
2802 | struct drm_crtc_state *crtc_state; | |
2803 | struct drm_crtc *crtc; | |
2804 | struct drm_connector *tmp_connector; | |
c36a3254 | 2805 | struct drm_connector_list_iter conn_iter; |
b486e0e6 DV |
2806 | int ret; |
2807 | bool active = false; | |
9a69a9ac | 2808 | int old_mode = connector->dpms; |
b486e0e6 DV |
2809 | |
2810 | if (mode != DRM_MODE_DPMS_ON) | |
2811 | mode = DRM_MODE_DPMS_OFF; | |
2812 | ||
2813 | connector->dpms = mode; | |
2814 | crtc = connector->state->crtc; | |
2815 | ||
2816 | if (!crtc) | |
9a69a9ac | 2817 | return 0; |
b486e0e6 | 2818 | |
b486e0e6 DV |
2819 | state = drm_atomic_state_alloc(connector->dev); |
2820 | if (!state) | |
9a69a9ac | 2821 | return -ENOMEM; |
b486e0e6 DV |
2822 | |
2823 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2824 | retry: | |
2825 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
9a69a9ac ML |
2826 | if (IS_ERR(crtc_state)) { |
2827 | ret = PTR_ERR(crtc_state); | |
2828 | goto fail; | |
2829 | } | |
b486e0e6 DV |
2830 | |
2831 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
2832 | ||
c36a3254 DV |
2833 | drm_connector_list_iter_get(connector->dev, &conn_iter); |
2834 | drm_for_each_connector_iter(tmp_connector, &conn_iter) { | |
0388df05 | 2835 | if (tmp_connector->state->crtc != crtc) |
b486e0e6 DV |
2836 | continue; |
2837 | ||
0388df05 | 2838 | if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { |
b486e0e6 DV |
2839 | active = true; |
2840 | break; | |
2841 | } | |
2842 | } | |
c36a3254 | 2843 | drm_connector_list_iter_put(&conn_iter); |
b486e0e6 DV |
2844 | crtc_state->active = active; |
2845 | ||
2846 | ret = drm_atomic_commit(state); | |
b486e0e6 DV |
2847 | fail: |
2848 | if (ret == -EDEADLK) | |
2849 | goto backoff; | |
8f5040e4 ML |
2850 | if (ret != 0) |
2851 | connector->dpms = old_mode; | |
0853695c | 2852 | drm_atomic_state_put(state); |
9a69a9ac | 2853 | return ret; |
0853695c | 2854 | |
b486e0e6 DV |
2855 | backoff: |
2856 | drm_atomic_state_clear(state); | |
2857 | drm_atomic_legacy_backoff(state); | |
2858 | ||
2859 | goto retry; | |
2860 | } | |
2861 | EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); | |
2862 | ||
9ecb5498 NT |
2863 | /** |
2864 | * drm_atomic_helper_best_encoder - Helper for &drm_connector_helper_funcs | |
2865 | * ->best_encoder callback | |
2866 | * @connector: Connector control structure | |
2867 | * | |
2868 | * This is a &drm_connector_helper_funcs ->best_encoder callback helper for | |
2869 | * connectors that support exactly 1 encoder, statically determined at driver | |
2870 | * init time. | |
2871 | */ | |
2872 | struct drm_encoder * | |
2873 | drm_atomic_helper_best_encoder(struct drm_connector *connector) | |
2874 | { | |
2875 | WARN_ON(connector->encoder_ids[1]); | |
2876 | return drm_encoder_find(connector->dev, connector->encoder_ids[0]); | |
2877 | } | |
2878 | EXPORT_SYMBOL(drm_atomic_helper_best_encoder); | |
2879 | ||
3150c7d0 DV |
2880 | /** |
2881 | * DOC: atomic state reset and initialization | |
2882 | * | |
2883 | * Both the drm core and the atomic helpers assume that there is always the full | |
2884 | * and correct atomic software state for all connectors, CRTCs and planes | |
2885 | * available. Which is a bit a problem on driver load and also after system | |
2886 | * suspend. One way to solve this is to have a hardware state read-out | |
2887 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
2888 | * driver). | |
2889 | * | |
2890 | * The simpler solution is to just reset the software state to everything off, | |
2891 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
2892 | * the atomic helpers provide default reset implementations for all hooks. | |
7f8ee3e5 DV |
2893 | * |
2894 | * On the upside the precise state tracking of atomic simplifies system suspend | |
2895 | * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe | |
2896 | * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume(). | |
2897 | * For other drivers the building blocks are split out, see the documentation | |
2898 | * for these functions. | |
3150c7d0 DV |
2899 | */ |
2900 | ||
d461701c DV |
2901 | /** |
2902 | * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs | |
2903 | * @crtc: drm CRTC | |
2904 | * | |
2905 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
2906 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2907 | */ | |
2908 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
2909 | { | |
b0b5511b | 2910 | if (crtc->state) |
ec2dc6a0 | 2911 | __drm_atomic_helper_crtc_destroy_state(crtc->state); |
b0b5511b | 2912 | |
d461701c DV |
2913 | kfree(crtc->state); |
2914 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
07cc0ef6 DV |
2915 | |
2916 | if (crtc->state) | |
2917 | crtc->state->crtc = crtc; | |
d461701c DV |
2918 | } |
2919 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
2920 | ||
f5e7840b TR |
2921 | /** |
2922 | * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state | |
2923 | * @crtc: CRTC object | |
2924 | * @state: atomic CRTC state | |
2925 | * | |
2926 | * Copies atomic state from a CRTC's current state and resets inferred values. | |
2927 | * This is useful for drivers that subclass the CRTC state. | |
2928 | */ | |
2929 | void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc, | |
2930 | struct drm_crtc_state *state) | |
2931 | { | |
2932 | memcpy(state, crtc->state, sizeof(*state)); | |
2933 | ||
99cf4a29 DS |
2934 | if (state->mode_blob) |
2935 | drm_property_reference_blob(state->mode_blob); | |
5488dc16 LL |
2936 | if (state->degamma_lut) |
2937 | drm_property_reference_blob(state->degamma_lut); | |
2938 | if (state->ctm) | |
2939 | drm_property_reference_blob(state->ctm); | |
2940 | if (state->gamma_lut) | |
2941 | drm_property_reference_blob(state->gamma_lut); | |
f5e7840b TR |
2942 | state->mode_changed = false; |
2943 | state->active_changed = false; | |
2944 | state->planes_changed = false; | |
fc596660 | 2945 | state->connectors_changed = false; |
5488dc16 | 2946 | state->color_mgmt_changed = false; |
44d1240d | 2947 | state->zpos_changed = false; |
f5e7840b TR |
2948 | state->event = NULL; |
2949 | } | |
2950 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state); | |
2951 | ||
d461701c DV |
2952 | /** |
2953 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
2954 | * @crtc: drm CRTC | |
2955 | * | |
2956 | * Default CRTC state duplicate hook for drivers which don't have their own | |
2957 | * subclassed CRTC state structure. | |
2958 | */ | |
2959 | struct drm_crtc_state * | |
2960 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
2961 | { | |
2962 | struct drm_crtc_state *state; | |
2963 | ||
2964 | if (WARN_ON(!crtc->state)) | |
2965 | return NULL; | |
2966 | ||
f5e7840b TR |
2967 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2968 | if (state) | |
2969 | __drm_atomic_helper_crtc_duplicate_state(crtc, state); | |
d461701c DV |
2970 | |
2971 | return state; | |
2972 | } | |
2973 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
2974 | ||
f5e7840b TR |
2975 | /** |
2976 | * __drm_atomic_helper_crtc_destroy_state - release CRTC state | |
f5e7840b TR |
2977 | * @state: CRTC state object to release |
2978 | * | |
2979 | * Releases all resources stored in the CRTC state without actually freeing | |
2980 | * the memory of the CRTC state. This is useful for drivers that subclass the | |
2981 | * CRTC state. | |
2982 | */ | |
ec2dc6a0 | 2983 | void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state) |
f5e7840b | 2984 | { |
5f911905 | 2985 | drm_property_unreference_blob(state->mode_blob); |
5488dc16 LL |
2986 | drm_property_unreference_blob(state->degamma_lut); |
2987 | drm_property_unreference_blob(state->ctm); | |
2988 | drm_property_unreference_blob(state->gamma_lut); | |
f5e7840b TR |
2989 | } |
2990 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); | |
2991 | ||
d461701c DV |
2992 | /** |
2993 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
2994 | * @crtc: drm CRTC | |
2995 | * @state: CRTC state object to release | |
2996 | * | |
2997 | * Default CRTC state destroy hook for drivers which don't have their own | |
2998 | * subclassed CRTC state structure. | |
2999 | */ | |
3000 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
3001 | struct drm_crtc_state *state) | |
3002 | { | |
ec2dc6a0 | 3003 | __drm_atomic_helper_crtc_destroy_state(state); |
d461701c DV |
3004 | kfree(state); |
3005 | } | |
3006 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
3007 | ||
3008 | /** | |
3009 | * drm_atomic_helper_plane_reset - default ->reset hook for planes | |
3010 | * @plane: drm plane | |
3011 | * | |
3012 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
3013 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
3014 | */ | |
3015 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
3016 | { | |
b0b5511b | 3017 | if (plane->state) |
2f701695 | 3018 | __drm_atomic_helper_plane_destroy_state(plane->state); |
321ebf04 | 3019 | |
d461701c DV |
3020 | kfree(plane->state); |
3021 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
07cc0ef6 | 3022 | |
25aaa3a1 | 3023 | if (plane->state) { |
07cc0ef6 | 3024 | plane->state->plane = plane; |
31ad61e4 | 3025 | plane->state->rotation = DRM_ROTATE_0; |
25aaa3a1 | 3026 | } |
d461701c DV |
3027 | } |
3028 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
3029 | ||
f5e7840b TR |
3030 | /** |
3031 | * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state | |
3032 | * @plane: plane object | |
3033 | * @state: atomic plane state | |
3034 | * | |
3035 | * Copies atomic state from a plane's current state. This is useful for | |
3036 | * drivers that subclass the plane state. | |
3037 | */ | |
3038 | void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane, | |
3039 | struct drm_plane_state *state) | |
3040 | { | |
3041 | memcpy(state, plane->state, sizeof(*state)); | |
3042 | ||
3043 | if (state->fb) | |
3044 | drm_framebuffer_reference(state->fb); | |
96260142 GP |
3045 | |
3046 | state->fence = NULL; | |
f5e7840b TR |
3047 | } |
3048 | EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state); | |
3049 | ||
d461701c DV |
3050 | /** |
3051 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
3052 | * @plane: drm plane | |
3053 | * | |
3054 | * Default plane state duplicate hook for drivers which don't have their own | |
3055 | * subclassed plane state structure. | |
3056 | */ | |
3057 | struct drm_plane_state * | |
3058 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
3059 | { | |
321ebf04 DV |
3060 | struct drm_plane_state *state; |
3061 | ||
d461701c DV |
3062 | if (WARN_ON(!plane->state)) |
3063 | return NULL; | |
3064 | ||
f5e7840b TR |
3065 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
3066 | if (state) | |
3067 | __drm_atomic_helper_plane_duplicate_state(plane, state); | |
321ebf04 DV |
3068 | |
3069 | return state; | |
d461701c DV |
3070 | } |
3071 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
3072 | ||
f5e7840b TR |
3073 | /** |
3074 | * __drm_atomic_helper_plane_destroy_state - release plane state | |
f5e7840b TR |
3075 | * @state: plane state object to release |
3076 | * | |
3077 | * Releases all resources stored in the plane state without actually freeing | |
3078 | * the memory of the plane state. This is useful for drivers that subclass the | |
3079 | * plane state. | |
3080 | */ | |
2f701695 | 3081 | void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state) |
f5e7840b TR |
3082 | { |
3083 | if (state->fb) | |
3084 | drm_framebuffer_unreference(state->fb); | |
96260142 GP |
3085 | |
3086 | if (state->fence) | |
3087 | dma_fence_put(state->fence); | |
f5e7840b TR |
3088 | } |
3089 | EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state); | |
3090 | ||
d461701c DV |
3091 | /** |
3092 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
3093 | * @plane: drm plane | |
3094 | * @state: plane state object to release | |
3095 | * | |
3096 | * Default plane state destroy hook for drivers which don't have their own | |
3097 | * subclassed plane state structure. | |
3098 | */ | |
3099 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
321ebf04 | 3100 | struct drm_plane_state *state) |
d461701c | 3101 | { |
2f701695 | 3102 | __drm_atomic_helper_plane_destroy_state(state); |
d461701c DV |
3103 | kfree(state); |
3104 | } | |
3105 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
3106 | ||
4cd39917 ML |
3107 | /** |
3108 | * __drm_atomic_helper_connector_reset - reset state on connector | |
3109 | * @connector: drm connector | |
3110 | * @conn_state: connector state to assign | |
3111 | * | |
3112 | * Initializes the newly allocated @conn_state and assigns it to | |
3113 | * #connector ->state, usually required when initializing the drivers | |
3114 | * or when called from the ->reset hook. | |
3115 | * | |
3116 | * This is useful for drivers that subclass the connector state. | |
3117 | */ | |
3118 | void | |
3119 | __drm_atomic_helper_connector_reset(struct drm_connector *connector, | |
3120 | struct drm_connector_state *conn_state) | |
3121 | { | |
3122 | if (conn_state) | |
3123 | conn_state->connector = connector; | |
3124 | ||
3125 | connector->state = conn_state; | |
3126 | } | |
3127 | EXPORT_SYMBOL(__drm_atomic_helper_connector_reset); | |
3128 | ||
d461701c DV |
3129 | /** |
3130 | * drm_atomic_helper_connector_reset - default ->reset hook for connectors | |
3131 | * @connector: drm connector | |
3132 | * | |
3133 | * Resets the atomic state for @connector by freeing the state pointer (which | |
3134 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
3135 | * object. | |
3136 | */ | |
3137 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
3138 | { | |
4cd39917 ML |
3139 | struct drm_connector_state *conn_state = |
3140 | kzalloc(sizeof(*conn_state), GFP_KERNEL); | |
07cc0ef6 | 3141 | |
b0b5511b | 3142 | if (connector->state) |
fabd9106 | 3143 | __drm_atomic_helper_connector_destroy_state(connector->state); |
b0b5511b | 3144 | |
4cd39917 ML |
3145 | kfree(connector->state); |
3146 | __drm_atomic_helper_connector_reset(connector, conn_state); | |
d461701c DV |
3147 | } |
3148 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
3149 | ||
f5e7840b TR |
3150 | /** |
3151 | * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state | |
3152 | * @connector: connector object | |
3153 | * @state: atomic connector state | |
3154 | * | |
3155 | * Copies atomic state from a connector's current state. This is useful for | |
3156 | * drivers that subclass the connector state. | |
3157 | */ | |
3158 | void | |
3159 | __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector, | |
3160 | struct drm_connector_state *state) | |
3161 | { | |
3162 | memcpy(state, connector->state, sizeof(*state)); | |
d2307dea DA |
3163 | if (state->crtc) |
3164 | drm_connector_reference(connector); | |
f5e7840b TR |
3165 | } |
3166 | EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state); | |
3167 | ||
d461701c DV |
3168 | /** |
3169 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
3170 | * @connector: drm connector | |
3171 | * | |
3172 | * Default connector state duplicate hook for drivers which don't have their own | |
3173 | * subclassed connector state structure. | |
3174 | */ | |
3175 | struct drm_connector_state * | |
3176 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
3177 | { | |
f5e7840b TR |
3178 | struct drm_connector_state *state; |
3179 | ||
d461701c DV |
3180 | if (WARN_ON(!connector->state)) |
3181 | return NULL; | |
3182 | ||
f5e7840b TR |
3183 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
3184 | if (state) | |
3185 | __drm_atomic_helper_connector_duplicate_state(connector, state); | |
3186 | ||
3187 | return state; | |
d461701c DV |
3188 | } |
3189 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
3190 | ||
397fd77c TR |
3191 | /** |
3192 | * drm_atomic_helper_duplicate_state - duplicate an atomic state object | |
3193 | * @dev: DRM device | |
3194 | * @ctx: lock acquisition context | |
3195 | * | |
3196 | * Makes a copy of the current atomic state by looping over all objects and | |
14942760 TR |
3197 | * duplicating their respective states. This is used for example by suspend/ |
3198 | * resume support code to save the state prior to suspend such that it can | |
3199 | * be restored upon resume. | |
397fd77c TR |
3200 | * |
3201 | * Note that this treats atomic state as persistent between save and restore. | |
3202 | * Drivers must make sure that this is possible and won't result in confusion | |
3203 | * or erroneous behaviour. | |
3204 | * | |
3205 | * Note that if callers haven't already acquired all modeset locks this might | |
3206 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
3207 | * | |
3208 | * Returns: | |
3209 | * A pointer to the copy of the atomic state object on success or an | |
3210 | * ERR_PTR()-encoded error code on failure. | |
14942760 TR |
3211 | * |
3212 | * See also: | |
3213 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
397fd77c TR |
3214 | */ |
3215 | struct drm_atomic_state * | |
3216 | drm_atomic_helper_duplicate_state(struct drm_device *dev, | |
3217 | struct drm_modeset_acquire_ctx *ctx) | |
3218 | { | |
3219 | struct drm_atomic_state *state; | |
3220 | struct drm_connector *conn; | |
c36a3254 | 3221 | struct drm_connector_list_iter conn_iter; |
397fd77c TR |
3222 | struct drm_plane *plane; |
3223 | struct drm_crtc *crtc; | |
3224 | int err = 0; | |
3225 | ||
3226 | state = drm_atomic_state_alloc(dev); | |
3227 | if (!state) | |
3228 | return ERR_PTR(-ENOMEM); | |
3229 | ||
3230 | state->acquire_ctx = ctx; | |
3231 | ||
3232 | drm_for_each_crtc(crtc, dev) { | |
3233 | struct drm_crtc_state *crtc_state; | |
3234 | ||
3235 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3236 | if (IS_ERR(crtc_state)) { | |
3237 | err = PTR_ERR(crtc_state); | |
3238 | goto free; | |
3239 | } | |
3240 | } | |
3241 | ||
3242 | drm_for_each_plane(plane, dev) { | |
3243 | struct drm_plane_state *plane_state; | |
3244 | ||
3245 | plane_state = drm_atomic_get_plane_state(state, plane); | |
3246 | if (IS_ERR(plane_state)) { | |
3247 | err = PTR_ERR(plane_state); | |
3248 | goto free; | |
3249 | } | |
3250 | } | |
3251 | ||
c36a3254 DV |
3252 | drm_connector_list_iter_get(dev, &conn_iter); |
3253 | drm_for_each_connector_iter(conn, &conn_iter) { | |
397fd77c TR |
3254 | struct drm_connector_state *conn_state; |
3255 | ||
3256 | conn_state = drm_atomic_get_connector_state(state, conn); | |
3257 | if (IS_ERR(conn_state)) { | |
3258 | err = PTR_ERR(conn_state); | |
c36a3254 | 3259 | drm_connector_list_iter_put(&conn_iter); |
397fd77c TR |
3260 | goto free; |
3261 | } | |
3262 | } | |
c36a3254 | 3263 | drm_connector_list_iter_put(&conn_iter); |
397fd77c TR |
3264 | |
3265 | /* clear the acquire context so that it isn't accidentally reused */ | |
3266 | state->acquire_ctx = NULL; | |
3267 | ||
3268 | free: | |
3269 | if (err < 0) { | |
0853695c | 3270 | drm_atomic_state_put(state); |
397fd77c TR |
3271 | state = ERR_PTR(err); |
3272 | } | |
3273 | ||
3274 | return state; | |
3275 | } | |
3276 | EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); | |
3277 | ||
f5e7840b TR |
3278 | /** |
3279 | * __drm_atomic_helper_connector_destroy_state - release connector state | |
f5e7840b TR |
3280 | * @state: connector state object to release |
3281 | * | |
3282 | * Releases all resources stored in the connector state without actually | |
3283 | * freeing the memory of the connector state. This is useful for drivers that | |
3284 | * subclass the connector state. | |
3285 | */ | |
3286 | void | |
fabd9106 | 3287 | __drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state) |
f5e7840b TR |
3288 | { |
3289 | /* | |
3290 | * This is currently a placeholder so that drivers that subclass the | |
3291 | * state will automatically do the right thing if code is ever added | |
3292 | * to this function. | |
3293 | */ | |
d2307dea DA |
3294 | if (state->crtc) |
3295 | drm_connector_unreference(state->connector); | |
f5e7840b TR |
3296 | } |
3297 | EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state); | |
3298 | ||
d461701c DV |
3299 | /** |
3300 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
3301 | * @connector: drm connector | |
3302 | * @state: connector state object to release | |
3303 | * | |
3304 | * Default connector state destroy hook for drivers which don't have their own | |
3305 | * subclassed connector state structure. | |
3306 | */ | |
3307 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
3308 | struct drm_connector_state *state) | |
3309 | { | |
fabd9106 | 3310 | __drm_atomic_helper_connector_destroy_state(state); |
d461701c DV |
3311 | kfree(state); |
3312 | } | |
3313 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); | |
5488dc16 LL |
3314 | |
3315 | /** | |
3316 | * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table | |
3317 | * @crtc: CRTC object | |
3318 | * @red: red correction table | |
3319 | * @green: green correction table | |
3320 | * @blue: green correction table | |
5488dc16 LL |
3321 | * @size: size of the tables |
3322 | * | |
3323 | * Implements support for legacy gamma correction table for drivers | |
3324 | * that support color management through the DEGAMMA_LUT/GAMMA_LUT | |
3325 | * properties. | |
3326 | */ | |
7ea77283 ML |
3327 | int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc, |
3328 | u16 *red, u16 *green, u16 *blue, | |
3329 | uint32_t size) | |
5488dc16 LL |
3330 | { |
3331 | struct drm_device *dev = crtc->dev; | |
3332 | struct drm_mode_config *config = &dev->mode_config; | |
3333 | struct drm_atomic_state *state; | |
3334 | struct drm_crtc_state *crtc_state; | |
3335 | struct drm_property_blob *blob = NULL; | |
3336 | struct drm_color_lut *blob_data; | |
3337 | int i, ret = 0; | |
3338 | ||
3339 | state = drm_atomic_state_alloc(crtc->dev); | |
3340 | if (!state) | |
7ea77283 | 3341 | return -ENOMEM; |
5488dc16 LL |
3342 | |
3343 | blob = drm_property_create_blob(dev, | |
3344 | sizeof(struct drm_color_lut) * size, | |
3345 | NULL); | |
562c5b4d LL |
3346 | if (IS_ERR(blob)) { |
3347 | ret = PTR_ERR(blob); | |
c1f415c9 | 3348 | blob = NULL; |
5488dc16 LL |
3349 | goto fail; |
3350 | } | |
3351 | ||
3352 | /* Prepare GAMMA_LUT with the legacy values. */ | |
3353 | blob_data = (struct drm_color_lut *) blob->data; | |
3354 | for (i = 0; i < size; i++) { | |
3355 | blob_data[i].red = red[i]; | |
3356 | blob_data[i].green = green[i]; | |
3357 | blob_data[i].blue = blue[i]; | |
3358 | } | |
3359 | ||
3360 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
3361 | retry: | |
3362 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3363 | if (IS_ERR(crtc_state)) { | |
3364 | ret = PTR_ERR(crtc_state); | |
3365 | goto fail; | |
3366 | } | |
3367 | ||
3368 | /* Reset DEGAMMA_LUT and CTM properties. */ | |
3369 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3370 | config->degamma_lut_property, 0); | |
3371 | if (ret) | |
3372 | goto fail; | |
3373 | ||
3374 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3375 | config->ctm_property, 0); | |
3376 | if (ret) | |
3377 | goto fail; | |
3378 | ||
3379 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3380 | config->gamma_lut_property, blob->base.id); | |
3381 | if (ret) | |
3382 | goto fail; | |
3383 | ||
3384 | ret = drm_atomic_commit(state); | |
5488dc16 LL |
3385 | fail: |
3386 | if (ret == -EDEADLK) | |
3387 | goto backoff; | |
3388 | ||
0853695c | 3389 | drm_atomic_state_put(state); |
5488dc16 | 3390 | drm_property_unreference_blob(blob); |
7ea77283 | 3391 | return ret; |
0853695c | 3392 | |
5488dc16 LL |
3393 | backoff: |
3394 | drm_atomic_state_clear(state); | |
3395 | drm_atomic_legacy_backoff(state); | |
3396 | ||
3397 | goto retry; | |
3398 | } | |
3399 | EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set); |