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c2fcd274 DV |
1 | /* |
2 | * Copyright (C) 2014 Red Hat | |
3 | * Copyright (C) 2014 Intel Corp. | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a | |
6 | * copy of this software and associated documentation files (the "Software"), | |
7 | * to deal in the Software without restriction, including without limitation | |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | * and/or sell copies of the Software, and to permit persons to whom the | |
10 | * Software is furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
21 | * OTHER DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Rob Clark <robdclark@gmail.com> | |
25 | * Daniel Vetter <daniel.vetter@ffwll.ch> | |
26 | */ | |
27 | ||
28 | #include <drm/drmP.h> | |
29 | #include <drm/drm_atomic.h> | |
30 | #include <drm/drm_plane_helper.h> | |
31 | #include <drm/drm_crtc_helper.h> | |
623369e5 | 32 | #include <drm/drm_atomic_helper.h> |
e2330f07 | 33 | #include <linux/fence.h> |
c2fcd274 | 34 | |
3150c7d0 DV |
35 | /** |
36 | * DOC: overview | |
37 | * | |
38 | * This helper library provides implementations of check and commit functions on | |
39 | * top of the CRTC modeset helper callbacks and the plane helper callbacks. It | |
40 | * also provides convenience implementations for the atomic state handling | |
41 | * callbacks for drivers which don't need to subclass the drm core structures to | |
42 | * add their own additional internal state. | |
43 | * | |
44 | * This library also provides default implementations for the check callback in | |
26196f7e DV |
45 | * drm_atomic_helper_check() and for the commit callback with |
46 | * drm_atomic_helper_commit(). But the individual stages and callbacks are | |
47 | * exposed to allow drivers to mix and match and e.g. use the plane helpers only | |
3150c7d0 DV |
48 | * together with a driver private modeset implementation. |
49 | * | |
50 | * This library also provides implementations for all the legacy driver | |
26196f7e DV |
51 | * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(), |
52 | * drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the | |
3150c7d0 DV |
53 | * various functions to implement set_property callbacks. New drivers must not |
54 | * implement these functions themselves but must use the provided helpers. | |
092d01da DV |
55 | * |
56 | * The atomic helper uses the same function table structures as all other | |
57 | * modesetting helpers. See the documentation for struct &drm_crtc_helper_funcs, | |
58 | * struct &drm_encoder_helper_funcs and struct &drm_connector_helper_funcs. It | |
59 | * also shares the struct &drm_plane_helper_funcs function table with the plane | |
60 | * helpers. | |
3150c7d0 | 61 | */ |
c2fcd274 DV |
62 | static void |
63 | drm_atomic_helper_plane_changed(struct drm_atomic_state *state, | |
64 | struct drm_plane_state *plane_state, | |
65 | struct drm_plane *plane) | |
66 | { | |
67 | struct drm_crtc_state *crtc_state; | |
68 | ||
69 | if (plane->state->crtc) { | |
4b08eae5 | 70 | crtc_state = state->crtc_states[drm_crtc_index(plane->state->crtc)]; |
c2fcd274 DV |
71 | |
72 | if (WARN_ON(!crtc_state)) | |
73 | return; | |
74 | ||
75 | crtc_state->planes_changed = true; | |
76 | } | |
77 | ||
78 | if (plane_state->crtc) { | |
79 | crtc_state = | |
80 | state->crtc_states[drm_crtc_index(plane_state->crtc)]; | |
81 | ||
82 | if (WARN_ON(!crtc_state)) | |
83 | return; | |
84 | ||
85 | crtc_state->planes_changed = true; | |
86 | } | |
87 | } | |
88 | ||
8248b65d ML |
89 | static int handle_conflicting_encoders(struct drm_atomic_state *state, |
90 | bool disable_conflicting_encoders) | |
40616a26 ML |
91 | { |
92 | struct drm_connector_state *conn_state; | |
93 | struct drm_connector *connector; | |
94 | struct drm_encoder *encoder; | |
95 | unsigned encoder_mask = 0; | |
96 | int i, ret; | |
97 | ||
8248b65d ML |
98 | /* |
99 | * First loop, find all newly assigned encoders from the connectors | |
100 | * part of the state. If the same encoder is assigned to multiple | |
101 | * connectors bail out. | |
102 | */ | |
40616a26 ML |
103 | for_each_connector_in_state(state, connector, conn_state, i) { |
104 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; | |
105 | struct drm_encoder *new_encoder; | |
106 | ||
107 | if (!conn_state->crtc) | |
108 | continue; | |
109 | ||
110 | if (funcs->atomic_best_encoder) | |
111 | new_encoder = funcs->atomic_best_encoder(connector, conn_state); | |
112 | else | |
113 | new_encoder = funcs->best_encoder(connector); | |
114 | ||
8248b65d ML |
115 | if (new_encoder) { |
116 | if (encoder_mask & (1 << drm_encoder_index(new_encoder))) { | |
117 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n", | |
118 | new_encoder->base.id, new_encoder->name, | |
119 | connector->base.id, connector->name); | |
120 | ||
121 | return -EINVAL; | |
122 | } | |
123 | ||
40616a26 | 124 | encoder_mask |= 1 << drm_encoder_index(new_encoder); |
8248b65d | 125 | } |
40616a26 ML |
126 | } |
127 | ||
8248b65d ML |
128 | if (!encoder_mask) |
129 | return 0; | |
130 | ||
131 | /* | |
132 | * Second loop, iterate over all connectors not part of the state. | |
133 | * | |
134 | * If a conflicting encoder is found and disable_conflicting_encoders | |
135 | * is not set, an error is returned. Userspace can provide a solution | |
136 | * through the atomic ioctl. | |
137 | * | |
138 | * If the flag is set conflicting connectors are removed from the crtc | |
139 | * and the crtc is disabled if no encoder is left. This preserves | |
140 | * compatibility with the legacy set_config behavior. | |
141 | */ | |
40616a26 ML |
142 | drm_for_each_connector(connector, state->dev) { |
143 | struct drm_crtc_state *crtc_state; | |
144 | ||
145 | if (drm_atomic_get_existing_connector_state(state, connector)) | |
146 | continue; | |
147 | ||
148 | encoder = connector->state->best_encoder; | |
149 | if (!encoder || !(encoder_mask & (1 << drm_encoder_index(encoder)))) | |
150 | continue; | |
151 | ||
8248b65d ML |
152 | if (!disable_conflicting_encoders) { |
153 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n", | |
154 | encoder->base.id, encoder->name, | |
155 | connector->state->crtc->base.id, | |
156 | connector->state->crtc->name, | |
157 | connector->base.id, connector->name); | |
158 | return -EINVAL; | |
159 | } | |
160 | ||
40616a26 ML |
161 | conn_state = drm_atomic_get_connector_state(state, connector); |
162 | if (IS_ERR(conn_state)) | |
163 | return PTR_ERR(conn_state); | |
164 | ||
165 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n", | |
166 | encoder->base.id, encoder->name, | |
167 | conn_state->crtc->base.id, conn_state->crtc->name, | |
168 | connector->base.id, connector->name); | |
169 | ||
170 | crtc_state = drm_atomic_get_existing_crtc_state(state, conn_state->crtc); | |
171 | ||
172 | ret = drm_atomic_set_crtc_for_connector(conn_state, NULL); | |
173 | if (ret) | |
174 | return ret; | |
175 | ||
176 | if (!crtc_state->connector_mask) { | |
177 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, | |
178 | NULL); | |
179 | if (ret < 0) | |
180 | return ret; | |
181 | ||
182 | crtc_state->active = false; | |
183 | } | |
184 | } | |
185 | ||
186 | return 0; | |
187 | } | |
188 | ||
e87a52b3 ML |
189 | static void |
190 | set_best_encoder(struct drm_atomic_state *state, | |
191 | struct drm_connector_state *conn_state, | |
192 | struct drm_encoder *encoder) | |
193 | { | |
194 | struct drm_crtc_state *crtc_state; | |
195 | struct drm_crtc *crtc; | |
196 | ||
197 | if (conn_state->best_encoder) { | |
198 | /* Unset the encoder_mask in the old crtc state. */ | |
199 | crtc = conn_state->connector->state->crtc; | |
200 | ||
201 | /* A NULL crtc is an error here because we should have | |
202 | * duplicated a NULL best_encoder when crtc was NULL. | |
203 | * As an exception restoring duplicated atomic state | |
204 | * during resume is allowed, so don't warn when | |
205 | * best_encoder is equal to encoder we intend to set. | |
206 | */ | |
207 | WARN_ON(!crtc && encoder != conn_state->best_encoder); | |
208 | if (crtc) { | |
209 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); | |
210 | ||
211 | crtc_state->encoder_mask &= | |
212 | ~(1 << drm_encoder_index(conn_state->best_encoder)); | |
213 | } | |
214 | } | |
215 | ||
216 | if (encoder) { | |
217 | crtc = conn_state->crtc; | |
218 | WARN_ON(!crtc); | |
219 | if (crtc) { | |
220 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); | |
221 | ||
222 | crtc_state->encoder_mask |= | |
223 | 1 << drm_encoder_index(encoder); | |
224 | } | |
225 | } | |
226 | ||
227 | conn_state->best_encoder = encoder; | |
228 | } | |
229 | ||
ec5aaa58 | 230 | static void |
623369e5 | 231 | steal_encoder(struct drm_atomic_state *state, |
ff19b786 | 232 | struct drm_encoder *encoder) |
623369e5 | 233 | { |
623369e5 DV |
234 | struct drm_crtc_state *crtc_state; |
235 | struct drm_connector *connector; | |
236 | struct drm_connector_state *connector_state; | |
ec5aaa58 | 237 | int i; |
623369e5 | 238 | |
ec5aaa58 | 239 | for_each_connector_in_state(state, connector, connector_state, i) { |
ff19b786 | 240 | struct drm_crtc *encoder_crtc; |
623369e5 | 241 | |
e87a52b3 ML |
242 | if (connector_state->best_encoder != encoder) |
243 | continue; | |
244 | ||
ff19b786 ML |
245 | encoder_crtc = connector->state->crtc; |
246 | ||
247 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n", | |
248 | encoder->base.id, encoder->name, | |
249 | encoder_crtc->base.id, encoder_crtc->name); | |
250 | ||
e87a52b3 | 251 | set_best_encoder(state, connector_state, NULL); |
ff19b786 ML |
252 | |
253 | crtc_state = drm_atomic_get_existing_crtc_state(state, encoder_crtc); | |
254 | crtc_state->connectors_changed = true; | |
255 | ||
ec5aaa58 | 256 | return; |
623369e5 | 257 | } |
623369e5 DV |
258 | } |
259 | ||
260 | static int | |
9459545b ML |
261 | update_connector_routing(struct drm_atomic_state *state, |
262 | struct drm_connector *connector, | |
263 | struct drm_connector_state *connector_state) | |
623369e5 | 264 | { |
b5ceff20 | 265 | const struct drm_connector_helper_funcs *funcs; |
623369e5 | 266 | struct drm_encoder *new_encoder; |
623369e5 | 267 | struct drm_crtc_state *crtc_state; |
623369e5 | 268 | |
17a38d9c DV |
269 | DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n", |
270 | connector->base.id, | |
271 | connector->name); | |
623369e5 DV |
272 | |
273 | if (connector->state->crtc != connector_state->crtc) { | |
274 | if (connector->state->crtc) { | |
9b8d1e53 | 275 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector->state->crtc); |
fc596660 | 276 | crtc_state->connectors_changed = true; |
623369e5 DV |
277 | } |
278 | ||
279 | if (connector_state->crtc) { | |
9b8d1e53 | 280 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc); |
fc596660 | 281 | crtc_state->connectors_changed = true; |
623369e5 DV |
282 | } |
283 | } | |
284 | ||
285 | if (!connector_state->crtc) { | |
17a38d9c | 286 | DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n", |
623369e5 DV |
287 | connector->base.id, |
288 | connector->name); | |
289 | ||
e87a52b3 | 290 | set_best_encoder(state, connector_state, NULL); |
623369e5 DV |
291 | |
292 | return 0; | |
293 | } | |
294 | ||
295 | funcs = connector->helper_private; | |
3b8a684b DV |
296 | |
297 | if (funcs->atomic_best_encoder) | |
298 | new_encoder = funcs->atomic_best_encoder(connector, | |
299 | connector_state); | |
300 | else | |
301 | new_encoder = funcs->best_encoder(connector); | |
623369e5 DV |
302 | |
303 | if (!new_encoder) { | |
17a38d9c DV |
304 | DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", |
305 | connector->base.id, | |
306 | connector->name); | |
623369e5 DV |
307 | return -EINVAL; |
308 | } | |
309 | ||
5481c8fb DV |
310 | if (!drm_encoder_crtc_ok(new_encoder, connector_state->crtc)) { |
311 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d]\n", | |
312 | new_encoder->base.id, | |
313 | new_encoder->name, | |
314 | connector_state->crtc->base.id); | |
315 | return -EINVAL; | |
316 | } | |
317 | ||
623369e5 | 318 | if (new_encoder == connector_state->best_encoder) { |
e87a52b3 ML |
319 | set_best_encoder(state, connector_state, new_encoder); |
320 | ||
fa3ab4c2 | 321 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n", |
17a38d9c DV |
322 | connector->base.id, |
323 | connector->name, | |
324 | new_encoder->base.id, | |
325 | new_encoder->name, | |
fa3ab4c2 VS |
326 | connector_state->crtc->base.id, |
327 | connector_state->crtc->name); | |
623369e5 DV |
328 | |
329 | return 0; | |
330 | } | |
331 | ||
ec5aaa58 | 332 | steal_encoder(state, new_encoder); |
623369e5 | 333 | |
e87a52b3 ML |
334 | set_best_encoder(state, connector_state, new_encoder); |
335 | ||
9b8d1e53 | 336 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc); |
fc596660 | 337 | crtc_state->connectors_changed = true; |
623369e5 | 338 | |
fa3ab4c2 | 339 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n", |
17a38d9c DV |
340 | connector->base.id, |
341 | connector->name, | |
342 | new_encoder->base.id, | |
343 | new_encoder->name, | |
fa3ab4c2 VS |
344 | connector_state->crtc->base.id, |
345 | connector_state->crtc->name); | |
623369e5 DV |
346 | |
347 | return 0; | |
348 | } | |
349 | ||
350 | static int | |
351 | mode_fixup(struct drm_atomic_state *state) | |
352 | { | |
df63b999 | 353 | struct drm_crtc *crtc; |
623369e5 | 354 | struct drm_crtc_state *crtc_state; |
df63b999 | 355 | struct drm_connector *connector; |
623369e5 DV |
356 | struct drm_connector_state *conn_state; |
357 | int i; | |
358 | bool ret; | |
359 | ||
df63b999 | 360 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
fc596660 ML |
361 | if (!crtc_state->mode_changed && |
362 | !crtc_state->connectors_changed) | |
623369e5 DV |
363 | continue; |
364 | ||
365 | drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); | |
366 | } | |
367 | ||
df63b999 | 368 | for_each_connector_in_state(state, connector, conn_state, i) { |
b5ceff20 | 369 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
370 | struct drm_encoder *encoder; |
371 | ||
623369e5 DV |
372 | WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); |
373 | ||
374 | if (!conn_state->crtc || !conn_state->best_encoder) | |
375 | continue; | |
376 | ||
377 | crtc_state = | |
378 | state->crtc_states[drm_crtc_index(conn_state->crtc)]; | |
379 | ||
380 | /* | |
381 | * Each encoder has at most one connector (since we always steal | |
382 | * it away), so we won't call ->mode_fixup twice. | |
383 | */ | |
384 | encoder = conn_state->best_encoder; | |
385 | funcs = encoder->helper_private; | |
840bfe95 ACO |
386 | if (!funcs) |
387 | continue; | |
623369e5 | 388 | |
862e686c AT |
389 | ret = drm_bridge_mode_fixup(encoder->bridge, &crtc_state->mode, |
390 | &crtc_state->adjusted_mode); | |
391 | if (!ret) { | |
392 | DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); | |
393 | return -EINVAL; | |
623369e5 DV |
394 | } |
395 | ||
4cd4df80 TR |
396 | if (funcs->atomic_check) { |
397 | ret = funcs->atomic_check(encoder, crtc_state, | |
398 | conn_state); | |
399 | if (ret) { | |
17a38d9c DV |
400 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", |
401 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
402 | return ret; |
403 | } | |
84524917 | 404 | } else if (funcs->mode_fixup) { |
4cd4df80 TR |
405 | ret = funcs->mode_fixup(encoder, &crtc_state->mode, |
406 | &crtc_state->adjusted_mode); | |
407 | if (!ret) { | |
17a38d9c DV |
408 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", |
409 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
410 | return -EINVAL; |
411 | } | |
623369e5 DV |
412 | } |
413 | } | |
414 | ||
df63b999 | 415 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 416 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 417 | |
fc596660 ML |
418 | if (!crtc_state->mode_changed && |
419 | !crtc_state->connectors_changed) | |
623369e5 DV |
420 | continue; |
421 | ||
422 | funcs = crtc->helper_private; | |
840bfe95 ACO |
423 | if (!funcs->mode_fixup) |
424 | continue; | |
425 | ||
623369e5 DV |
426 | ret = funcs->mode_fixup(crtc, &crtc_state->mode, |
427 | &crtc_state->adjusted_mode); | |
428 | if (!ret) { | |
fa3ab4c2 VS |
429 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n", |
430 | crtc->base.id, crtc->name); | |
623369e5 DV |
431 | return -EINVAL; |
432 | } | |
433 | } | |
434 | ||
435 | return 0; | |
436 | } | |
437 | ||
d9b13620 | 438 | /** |
f98bd3ef | 439 | * drm_atomic_helper_check_modeset - validate state object for modeset changes |
d9b13620 DV |
440 | * @dev: DRM device |
441 | * @state: the driver state object | |
442 | * | |
443 | * Check the state object to see if the requested state is physically possible. | |
444 | * This does all the crtc and connector related computations for an atomic | |
fc596660 ML |
445 | * update and adds any additional connectors needed for full modesets and calls |
446 | * down into ->mode_fixup functions of the driver backend. | |
447 | * | |
448 | * crtc_state->mode_changed is set when the input mode is changed. | |
449 | * crtc_state->connectors_changed is set when a connector is added or | |
450 | * removed from the crtc. | |
451 | * crtc_state->active_changed is set when crtc_state->active changes, | |
452 | * which is used for dpms. | |
d9b13620 DV |
453 | * |
454 | * IMPORTANT: | |
455 | * | |
456 | * Drivers which update ->mode_changed (e.g. in their ->atomic_check hooks if a | |
457 | * plane update can't be done without a full modeset) _must_ call this function | |
458 | * afterwards after that change. It is permitted to call this function multiple | |
459 | * times for the same update, e.g. when the ->atomic_check functions depend upon | |
460 | * the adjusted dotclock for fifo space allocation and watermark computation. | |
461 | * | |
462 | * RETURNS | |
463 | * Zero for success or -errno | |
464 | */ | |
465 | int | |
934ce1c2 | 466 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
467 | struct drm_atomic_state *state) |
468 | { | |
623369e5 DV |
469 | struct drm_crtc *crtc; |
470 | struct drm_crtc_state *crtc_state; | |
df63b999 ACO |
471 | struct drm_connector *connector; |
472 | struct drm_connector_state *connector_state; | |
623369e5 DV |
473 | int i, ret; |
474 | ||
df63b999 | 475 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 | 476 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { |
fa3ab4c2 VS |
477 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n", |
478 | crtc->base.id, crtc->name); | |
623369e5 DV |
479 | crtc_state->mode_changed = true; |
480 | } | |
481 | ||
482 | if (crtc->state->enable != crtc_state->enable) { | |
fa3ab4c2 VS |
483 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n", |
484 | crtc->base.id, crtc->name); | |
fc596660 ML |
485 | |
486 | /* | |
487 | * For clarity this assignment is done here, but | |
488 | * enable == 0 is only true when there are no | |
489 | * connectors and a NULL mode. | |
490 | * | |
491 | * The other way around is true as well. enable != 0 | |
492 | * iff connectors are attached and a mode is set. | |
493 | */ | |
623369e5 | 494 | crtc_state->mode_changed = true; |
fc596660 | 495 | crtc_state->connectors_changed = true; |
623369e5 DV |
496 | } |
497 | } | |
498 | ||
8248b65d ML |
499 | ret = handle_conflicting_encoders(state, state->legacy_set_config); |
500 | if (ret) | |
501 | return ret; | |
40616a26 | 502 | |
df63b999 | 503 | for_each_connector_in_state(state, connector, connector_state, i) { |
623369e5 DV |
504 | /* |
505 | * This only sets crtc->mode_changed for routing changes, | |
506 | * drivers must set crtc->mode_changed themselves when connector | |
507 | * properties need to be updated. | |
508 | */ | |
9459545b ML |
509 | ret = update_connector_routing(state, connector, |
510 | connector_state); | |
623369e5 DV |
511 | if (ret) |
512 | return ret; | |
513 | } | |
514 | ||
515 | /* | |
516 | * After all the routing has been prepared we need to add in any | |
517 | * connector which is itself unchanged, but who's crtc changes it's | |
518 | * configuration. This must be done before calling mode_fixup in case a | |
519 | * crtc only changed its mode but has the same set of connectors. | |
520 | */ | |
df63b999 | 521 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
14de6c44 ML |
522 | bool has_connectors = |
523 | !!crtc_state->connector_mask; | |
623369e5 | 524 | |
eab3bbef DV |
525 | /* |
526 | * We must set ->active_changed after walking connectors for | |
527 | * otherwise an update that only changes active would result in | |
528 | * a full modeset because update_connector_routing force that. | |
529 | */ | |
530 | if (crtc->state->active != crtc_state->active) { | |
fa3ab4c2 VS |
531 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", |
532 | crtc->base.id, crtc->name); | |
eab3bbef DV |
533 | crtc_state->active_changed = true; |
534 | } | |
535 | ||
2465ff62 | 536 | if (!drm_atomic_crtc_needs_modeset(crtc_state)) |
623369e5 DV |
537 | continue; |
538 | ||
fa3ab4c2 VS |
539 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n", |
540 | crtc->base.id, crtc->name, | |
17a38d9c | 541 | crtc_state->enable ? 'y' : 'n', |
fa3ab4c2 | 542 | crtc_state->active ? 'y' : 'n'); |
623369e5 DV |
543 | |
544 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
545 | if (ret != 0) | |
546 | return ret; | |
547 | ||
57744aa7 ML |
548 | ret = drm_atomic_add_affected_planes(state, crtc); |
549 | if (ret != 0) | |
550 | return ret; | |
551 | ||
14de6c44 | 552 | if (crtc_state->enable != has_connectors) { |
fa3ab4c2 VS |
553 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", |
554 | crtc->base.id, crtc->name); | |
623369e5 DV |
555 | |
556 | return -EINVAL; | |
557 | } | |
558 | } | |
559 | ||
560 | return mode_fixup(state); | |
561 | } | |
d9b13620 | 562 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 563 | |
c2fcd274 | 564 | /** |
f98bd3ef | 565 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
566 | * @dev: DRM device |
567 | * @state: the driver state object | |
568 | * | |
569 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 DV |
570 | * This does all the plane update related checks using by calling into the |
571 | * ->atomic_check hooks provided by the driver. | |
c2fcd274 | 572 | * |
fc596660 ML |
573 | * It also sets crtc_state->planes_changed to indicate that a crtc has |
574 | * updated planes. | |
575 | * | |
c2fcd274 DV |
576 | * RETURNS |
577 | * Zero for success or -errno | |
578 | */ | |
d9b13620 DV |
579 | int |
580 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
581 | struct drm_atomic_state *state) | |
c2fcd274 | 582 | { |
df63b999 ACO |
583 | struct drm_crtc *crtc; |
584 | struct drm_crtc_state *crtc_state; | |
585 | struct drm_plane *plane; | |
586 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
587 | int i, ret = 0; |
588 | ||
df63b999 | 589 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 590 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
591 | |
592 | funcs = plane->helper_private; | |
593 | ||
594 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
595 | ||
596 | if (!funcs || !funcs->atomic_check) | |
597 | continue; | |
598 | ||
599 | ret = funcs->atomic_check(plane, plane_state); | |
600 | if (ret) { | |
9f4c97a2 VS |
601 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n", |
602 | plane->base.id, plane->name); | |
c2fcd274 DV |
603 | return ret; |
604 | } | |
605 | } | |
606 | ||
df63b999 | 607 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 608 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
609 | |
610 | funcs = crtc->helper_private; | |
611 | ||
612 | if (!funcs || !funcs->atomic_check) | |
613 | continue; | |
614 | ||
615 | ret = funcs->atomic_check(crtc, state->crtc_states[i]); | |
616 | if (ret) { | |
fa3ab4c2 VS |
617 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n", |
618 | crtc->base.id, crtc->name); | |
c2fcd274 DV |
619 | return ret; |
620 | } | |
621 | } | |
622 | ||
d9b13620 DV |
623 | return ret; |
624 | } | |
625 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
626 | ||
627 | /** | |
628 | * drm_atomic_helper_check - validate state object | |
629 | * @dev: DRM device | |
630 | * @state: the driver state object | |
631 | * | |
632 | * Check the state object to see if the requested state is physically possible. | |
633 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
634 | * checking that a driver needs it can simply wrap that around this function. | |
635 | * Drivers without such needs can directly use this as their ->atomic_check() | |
636 | * callback. | |
637 | * | |
b4274fbe DV |
638 | * This just wraps the two parts of the state checking for planes and modeset |
639 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
640 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
641 | * ->atomic_check functions depend upon an updated adjusted_mode.clock to | |
642 | * e.g. properly compute watermarks. | |
643 | * | |
d9b13620 DV |
644 | * RETURNS |
645 | * Zero for success or -errno | |
646 | */ | |
647 | int drm_atomic_helper_check(struct drm_device *dev, | |
648 | struct drm_atomic_state *state) | |
649 | { | |
650 | int ret; | |
651 | ||
b4274fbe | 652 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
653 | if (ret) |
654 | return ret; | |
655 | ||
b4274fbe | 656 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
657 | if (ret) |
658 | return ret; | |
659 | ||
c2fcd274 DV |
660 | return ret; |
661 | } | |
662 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
663 | ||
623369e5 DV |
664 | static void |
665 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
666 | { | |
df63b999 ACO |
667 | struct drm_connector *connector; |
668 | struct drm_connector_state *old_conn_state; | |
669 | struct drm_crtc *crtc; | |
670 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
671 | int i; |
672 | ||
df63b999 | 673 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 674 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
675 | struct drm_encoder *encoder; |
676 | ||
623369e5 DV |
677 | /* Shut down everything that's in the changeset and currently |
678 | * still on. So need to check the old, saved state. */ | |
df63b999 | 679 | if (!old_conn_state->crtc) |
623369e5 DV |
680 | continue; |
681 | ||
eab3bbef DV |
682 | old_crtc_state = old_state->crtc_states[drm_crtc_index(old_conn_state->crtc)]; |
683 | ||
4218a32f | 684 | if (!old_crtc_state->active || |
2465ff62 | 685 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) |
eab3bbef DV |
686 | continue; |
687 | ||
46df9adb | 688 | encoder = old_conn_state->best_encoder; |
623369e5 | 689 | |
46df9adb RC |
690 | /* We shouldn't get this far if we didn't previously have |
691 | * an encoder.. but WARN_ON() rather than explode. | |
692 | */ | |
693 | if (WARN_ON(!encoder)) | |
623369e5 DV |
694 | continue; |
695 | ||
696 | funcs = encoder->helper_private; | |
697 | ||
17a38d9c DV |
698 | DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
699 | encoder->base.id, encoder->name); | |
95d6eb3b | 700 | |
623369e5 DV |
701 | /* |
702 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 703 | * it away), so we won't call disable hooks twice. |
623369e5 | 704 | */ |
862e686c | 705 | drm_bridge_disable(encoder->bridge); |
623369e5 DV |
706 | |
707 | /* Right function depends upon target state. */ | |
ee0a89cf | 708 | if (connector->state->crtc && funcs->prepare) |
623369e5 DV |
709 | funcs->prepare(encoder); |
710 | else if (funcs->disable) | |
711 | funcs->disable(encoder); | |
712 | else | |
713 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
714 | ||
862e686c | 715 | drm_bridge_post_disable(encoder->bridge); |
623369e5 DV |
716 | } |
717 | ||
df63b999 | 718 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 719 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
720 | |
721 | /* Shut down everything that needs a full modeset. */ | |
2465ff62 | 722 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
723 | continue; |
724 | ||
725 | if (!old_crtc_state->active) | |
623369e5 DV |
726 | continue; |
727 | ||
728 | funcs = crtc->helper_private; | |
729 | ||
fa3ab4c2 VS |
730 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n", |
731 | crtc->base.id, crtc->name); | |
95d6eb3b DV |
732 | |
733 | ||
623369e5 | 734 | /* Right function depends upon target state. */ |
ee0a89cf | 735 | if (crtc->state->enable && funcs->prepare) |
623369e5 DV |
736 | funcs->prepare(crtc); |
737 | else if (funcs->disable) | |
738 | funcs->disable(crtc); | |
739 | else | |
740 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
741 | } | |
742 | } | |
743 | ||
4c18d301 DV |
744 | /** |
745 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state | |
746 | * @dev: DRM device | |
747 | * @old_state: atomic state object with old state structures | |
748 | * | |
749 | * This function updates all the various legacy modeset state pointers in | |
750 | * connectors, encoders and crtcs. It also updates the timestamping constants | |
751 | * used for precise vblank timestamps by calling | |
752 | * drm_calc_timestamping_constants(). | |
753 | * | |
754 | * Drivers can use this for building their own atomic commit if they don't have | |
755 | * a pure helper-based modeset implementation. | |
756 | */ | |
757 | void | |
758 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, | |
759 | struct drm_atomic_state *old_state) | |
623369e5 | 760 | { |
df63b999 ACO |
761 | struct drm_connector *connector; |
762 | struct drm_connector_state *old_conn_state; | |
763 | struct drm_crtc *crtc; | |
764 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
765 | int i; |
766 | ||
8c10342c | 767 | /* clear out existing links and update dpms */ |
df63b999 | 768 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
8c10342c ML |
769 | if (connector->encoder) { |
770 | WARN_ON(!connector->encoder->crtc); | |
771 | ||
772 | connector->encoder->crtc = NULL; | |
773 | connector->encoder = NULL; | |
774 | } | |
623369e5 | 775 | |
8c10342c ML |
776 | crtc = connector->state->crtc; |
777 | if ((!crtc && old_conn_state->crtc) || | |
778 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { | |
779 | struct drm_property *dpms_prop = | |
780 | dev->mode_config.dpms_property; | |
781 | int mode = DRM_MODE_DPMS_OFF; | |
623369e5 | 782 | |
8c10342c ML |
783 | if (crtc && crtc->state->active) |
784 | mode = DRM_MODE_DPMS_ON; | |
785 | ||
786 | connector->dpms = mode; | |
787 | drm_object_property_set_value(&connector->base, | |
788 | dpms_prop, mode); | |
789 | } | |
623369e5 DV |
790 | } |
791 | ||
792 | /* set new links */ | |
df63b999 ACO |
793 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
794 | if (!connector->state->crtc) | |
623369e5 DV |
795 | continue; |
796 | ||
797 | if (WARN_ON(!connector->state->best_encoder)) | |
798 | continue; | |
799 | ||
800 | connector->encoder = connector->state->best_encoder; | |
801 | connector->encoder->crtc = connector->state->crtc; | |
802 | } | |
803 | ||
804 | /* set legacy state in the crtc structure */ | |
df63b999 | 805 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
2660801f ML |
806 | struct drm_plane *primary = crtc->primary; |
807 | ||
623369e5 DV |
808 | crtc->mode = crtc->state->mode; |
809 | crtc->enabled = crtc->state->enable; | |
2660801f ML |
810 | |
811 | if (drm_atomic_get_existing_plane_state(old_state, primary) && | |
812 | primary->state->crtc == crtc) { | |
813 | crtc->x = primary->state->src_x >> 16; | |
814 | crtc->y = primary->state->src_y >> 16; | |
815 | } | |
3d51d2d2 DV |
816 | |
817 | if (crtc->state->enable) | |
818 | drm_calc_timestamping_constants(crtc, | |
819 | &crtc->state->adjusted_mode); | |
623369e5 DV |
820 | } |
821 | } | |
4c18d301 | 822 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); |
623369e5 DV |
823 | |
824 | static void | |
825 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
826 | { | |
df63b999 ACO |
827 | struct drm_crtc *crtc; |
828 | struct drm_crtc_state *old_crtc_state; | |
829 | struct drm_connector *connector; | |
830 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
831 | int i; |
832 | ||
df63b999 | 833 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 834 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 835 | |
df63b999 | 836 | if (!crtc->state->mode_changed) |
623369e5 DV |
837 | continue; |
838 | ||
839 | funcs = crtc->helper_private; | |
840 | ||
c982bd90 | 841 | if (crtc->state->enable && funcs->mode_set_nofb) { |
fa3ab4c2 VS |
842 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n", |
843 | crtc->base.id, crtc->name); | |
95d6eb3b | 844 | |
623369e5 | 845 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 846 | } |
623369e5 DV |
847 | } |
848 | ||
df63b999 | 849 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 850 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 851 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
852 | struct drm_encoder *encoder; |
853 | struct drm_display_mode *mode, *adjusted_mode; | |
854 | ||
df63b999 | 855 | if (!connector->state->best_encoder) |
623369e5 DV |
856 | continue; |
857 | ||
858 | encoder = connector->state->best_encoder; | |
859 | funcs = encoder->helper_private; | |
860 | new_crtc_state = connector->state->crtc->state; | |
861 | mode = &new_crtc_state->mode; | |
862 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
863 | ||
eab3bbef DV |
864 | if (!new_crtc_state->mode_changed) |
865 | continue; | |
866 | ||
17a38d9c DV |
867 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
868 | encoder->base.id, encoder->name); | |
95d6eb3b | 869 | |
623369e5 DV |
870 | /* |
871 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 872 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 873 | */ |
c982bd90 DV |
874 | if (funcs->mode_set) |
875 | funcs->mode_set(encoder, mode, adjusted_mode); | |
623369e5 | 876 | |
862e686c | 877 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
623369e5 DV |
878 | } |
879 | } | |
880 | ||
881 | /** | |
1af434a9 | 882 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 883 | * @dev: DRM device |
a072f809 | 884 | * @old_state: atomic state object with old state structures |
623369e5 | 885 | * |
1af434a9 | 886 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 887 | * prepares them (if required) with the new mode. |
1af434a9 | 888 | * |
60acc4eb | 889 | * For compatibility with legacy crtc helpers this should be called before |
1af434a9 DV |
890 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
891 | * does. But drivers with different needs can group the modeset commits together | |
892 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
893 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 894 | */ |
1af434a9 DV |
895 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
896 | struct drm_atomic_state *old_state) | |
623369e5 | 897 | { |
a072f809 | 898 | disable_outputs(dev, old_state); |
4c18d301 DV |
899 | |
900 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); | |
901 | ||
a072f809 | 902 | crtc_set_mode(dev, old_state); |
623369e5 | 903 | } |
1af434a9 | 904 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 DV |
905 | |
906 | /** | |
1af434a9 | 907 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
908 | * @dev: DRM device |
909 | * @old_state: atomic state object with old state structures | |
910 | * | |
1af434a9 DV |
911 | * This function enables all the outputs with the new configuration which had to |
912 | * be turned off for the update. | |
913 | * | |
60acc4eb | 914 | * For compatibility with legacy crtc helpers this should be called after |
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_enables(struct drm_device *dev, |
921 | struct drm_atomic_state *old_state) | |
623369e5 | 922 | { |
df63b999 ACO |
923 | struct drm_crtc *crtc; |
924 | struct drm_crtc_state *old_crtc_state; | |
925 | struct drm_connector *connector; | |
926 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
927 | int i; |
928 | ||
df63b999 | 929 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 930 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
931 | |
932 | /* Need to filter out CRTCs where only planes change. */ | |
2465ff62 | 933 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
934 | continue; |
935 | ||
936 | if (!crtc->state->active) | |
623369e5 DV |
937 | continue; |
938 | ||
939 | funcs = crtc->helper_private; | |
940 | ||
ee0a89cf | 941 | if (crtc->state->enable) { |
fa3ab4c2 VS |
942 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n", |
943 | crtc->base.id, crtc->name); | |
95d6eb3b | 944 | |
ee0a89cf DV |
945 | if (funcs->enable) |
946 | funcs->enable(crtc); | |
947 | else | |
948 | funcs->commit(crtc); | |
949 | } | |
623369e5 DV |
950 | } |
951 | ||
df63b999 | 952 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 953 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
954 | struct drm_encoder *encoder; |
955 | ||
df63b999 | 956 | if (!connector->state->best_encoder) |
623369e5 DV |
957 | continue; |
958 | ||
4218a32f | 959 | if (!connector->state->crtc->state->active || |
2465ff62 | 960 | !drm_atomic_crtc_needs_modeset(connector->state->crtc->state)) |
eab3bbef DV |
961 | continue; |
962 | ||
623369e5 DV |
963 | encoder = connector->state->best_encoder; |
964 | funcs = encoder->helper_private; | |
965 | ||
17a38d9c DV |
966 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
967 | encoder->base.id, encoder->name); | |
95d6eb3b | 968 | |
623369e5 DV |
969 | /* |
970 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 971 | * it away), so we won't call enable hooks twice. |
623369e5 | 972 | */ |
862e686c | 973 | drm_bridge_pre_enable(encoder->bridge); |
623369e5 | 974 | |
ee0a89cf DV |
975 | if (funcs->enable) |
976 | funcs->enable(encoder); | |
977 | else | |
978 | funcs->commit(encoder); | |
623369e5 | 979 | |
862e686c | 980 | drm_bridge_enable(encoder->bridge); |
623369e5 DV |
981 | } |
982 | } | |
1af434a9 | 983 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 984 | |
e2330f07 DV |
985 | static void wait_for_fences(struct drm_device *dev, |
986 | struct drm_atomic_state *state) | |
987 | { | |
df63b999 ACO |
988 | struct drm_plane *plane; |
989 | struct drm_plane_state *plane_state; | |
e2330f07 DV |
990 | int i; |
991 | ||
df63b999 ACO |
992 | for_each_plane_in_state(state, plane, plane_state, i) { |
993 | if (!plane->state->fence) | |
e2330f07 DV |
994 | continue; |
995 | ||
996 | WARN_ON(!plane->state->fb); | |
997 | ||
998 | fence_wait(plane->state->fence, false); | |
999 | fence_put(plane->state->fence); | |
1000 | plane->state->fence = NULL; | |
1001 | } | |
1002 | } | |
1003 | ||
c240906d JK |
1004 | /** |
1005 | * drm_atomic_helper_framebuffer_changed - check if framebuffer has changed | |
1006 | * @dev: DRM device | |
1007 | * @old_state: atomic state object with old state structures | |
1008 | * @crtc: DRM crtc | |
1009 | * | |
1010 | * Checks whether the framebuffer used for this CRTC changes as a result of | |
1011 | * the atomic update. This is useful for drivers which cannot use | |
1012 | * drm_atomic_helper_wait_for_vblanks() and need to reimplement its | |
1013 | * functionality. | |
1014 | * | |
1015 | * Returns: | |
1016 | * true if the framebuffer changed. | |
1017 | */ | |
1018 | bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev, | |
1019 | struct drm_atomic_state *old_state, | |
1020 | struct drm_crtc *crtc) | |
ab58e338 DV |
1021 | { |
1022 | struct drm_plane *plane; | |
1023 | struct drm_plane_state *old_plane_state; | |
ab58e338 DV |
1024 | int i; |
1025 | ||
df63b999 | 1026 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
ab58e338 DV |
1027 | if (plane->state->crtc != crtc && |
1028 | old_plane_state->crtc != crtc) | |
1029 | continue; | |
1030 | ||
1031 | if (plane->state->fb != old_plane_state->fb) | |
1032 | return true; | |
1033 | } | |
1034 | ||
1035 | return false; | |
1036 | } | |
c240906d | 1037 | EXPORT_SYMBOL(drm_atomic_helper_framebuffer_changed); |
ab58e338 | 1038 | |
5ee3229c RC |
1039 | /** |
1040 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
1041 | * @dev: DRM device | |
1042 | * @old_state: atomic state object with old state structures | |
1043 | * | |
1044 | * Helper to, after atomic commit, wait for vblanks on all effected | |
1045 | * crtcs (ie. before cleaning up old framebuffers using | |
ab58e338 DV |
1046 | * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
1047 | * framebuffers have actually changed to optimize for the legacy cursor and | |
1048 | * plane update use-case. | |
5ee3229c RC |
1049 | */ |
1050 | void | |
1051 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
1052 | struct drm_atomic_state *old_state) | |
623369e5 DV |
1053 | { |
1054 | struct drm_crtc *crtc; | |
1055 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
1056 | int i, ret; |
1057 | ||
df63b999 | 1058 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
623369e5 DV |
1059 | /* No one cares about the old state, so abuse it for tracking |
1060 | * and store whether we hold a vblank reference (and should do a | |
1061 | * vblank wait) in the ->enable boolean. */ | |
1062 | old_crtc_state->enable = false; | |
1063 | ||
1064 | if (!crtc->state->enable) | |
1065 | continue; | |
1066 | ||
f02ad907 DV |
1067 | /* Legacy cursor ioctls are completely unsynced, and userspace |
1068 | * relies on that (by doing tons of cursor updates). */ | |
1069 | if (old_state->legacy_cursor_update) | |
1070 | continue; | |
1071 | ||
c240906d JK |
1072 | if (!drm_atomic_helper_framebuffer_changed(dev, |
1073 | old_state, crtc)) | |
ab58e338 DV |
1074 | continue; |
1075 | ||
623369e5 DV |
1076 | ret = drm_crtc_vblank_get(crtc); |
1077 | if (ret != 0) | |
1078 | continue; | |
1079 | ||
1080 | old_crtc_state->enable = true; | |
d4853630 | 1081 | old_crtc_state->last_vblank_count = drm_crtc_vblank_count(crtc); |
623369e5 DV |
1082 | } |
1083 | ||
df63b999 ACO |
1084 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
1085 | if (!old_crtc_state->enable) | |
623369e5 DV |
1086 | continue; |
1087 | ||
1088 | ret = wait_event_timeout(dev->vblank[i].queue, | |
1089 | old_crtc_state->last_vblank_count != | |
d4853630 | 1090 | drm_crtc_vblank_count(crtc), |
623369e5 DV |
1091 | msecs_to_jiffies(50)); |
1092 | ||
1093 | drm_crtc_vblank_put(crtc); | |
1094 | } | |
1095 | } | |
5ee3229c | 1096 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 DV |
1097 | |
1098 | /** | |
1099 | * drm_atomic_helper_commit - commit validated state object | |
1100 | * @dev: DRM device | |
1101 | * @state: the driver state object | |
1102 | * @async: asynchronous commit | |
1103 | * | |
1104 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
1105 | * object. This can still fail when e.g. the framebuffer reservation fails. For | |
1106 | * now this doesn't implement asynchronous commits. | |
1107 | * | |
6e48ae32 DV |
1108 | * Note that right now this function does not support async commits, and hence |
1109 | * driver writers must implement their own version for now. Also note that the | |
1110 | * default ordering of how the various stages are called is to match the legacy | |
1111 | * modeset helper library closest. One peculiarity of that is that it doesn't | |
1112 | * mesh well with runtime PM at all. | |
1113 | * | |
1114 | * For drivers supporting runtime PM the recommended sequence is | |
1115 | * | |
1116 | * drm_atomic_helper_commit_modeset_disables(dev, state); | |
1117 | * | |
1118 | * drm_atomic_helper_commit_modeset_enables(dev, state); | |
1119 | * | |
1120 | * drm_atomic_helper_commit_planes(dev, state, true); | |
1121 | * | |
1122 | * See the kerneldoc entries for these three functions for more details. | |
1123 | * | |
623369e5 DV |
1124 | * RETURNS |
1125 | * Zero for success or -errno. | |
1126 | */ | |
1127 | int drm_atomic_helper_commit(struct drm_device *dev, | |
1128 | struct drm_atomic_state *state, | |
1129 | bool async) | |
1130 | { | |
1131 | int ret; | |
1132 | ||
1133 | if (async) | |
1134 | return -EBUSY; | |
1135 | ||
1136 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
1137 | if (ret) | |
1138 | return ret; | |
1139 | ||
1140 | /* | |
1141 | * This is the point of no return - everything below never fails except | |
1142 | * when the hw goes bonghits. Which means we can commit the new state on | |
1143 | * the software side now. | |
1144 | */ | |
1145 | ||
1146 | drm_atomic_helper_swap_state(dev, state); | |
1147 | ||
1148 | /* | |
1149 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 1150 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
1151 | * that the asynchronous work has either been cancelled (if the driver |
1152 | * supports it, which at least requires that the framebuffers get | |
1153 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
1154 | * before the new state gets committed on the software side with | |
1155 | * drm_atomic_helper_swap_state(). | |
1156 | * | |
1157 | * This scheme allows new atomic state updates to be prepared and | |
1158 | * checked in parallel to the asynchronous completion of the previous | |
1159 | * update. Which is important since compositors need to figure out the | |
1160 | * composition of the next frame right after having submitted the | |
1161 | * current layout. | |
1162 | */ | |
1163 | ||
e2330f07 DV |
1164 | wait_for_fences(dev, state); |
1165 | ||
1af434a9 | 1166 | drm_atomic_helper_commit_modeset_disables(dev, state); |
623369e5 | 1167 | |
aef9dbb8 | 1168 | drm_atomic_helper_commit_planes(dev, state, false); |
623369e5 | 1169 | |
1af434a9 | 1170 | drm_atomic_helper_commit_modeset_enables(dev, state); |
623369e5 | 1171 | |
5ee3229c | 1172 | drm_atomic_helper_wait_for_vblanks(dev, state); |
623369e5 DV |
1173 | |
1174 | drm_atomic_helper_cleanup_planes(dev, state); | |
1175 | ||
1176 | drm_atomic_state_free(state); | |
1177 | ||
1178 | return 0; | |
1179 | } | |
1180 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1181 | ||
e8c833a7 DV |
1182 | /** |
1183 | * DOC: implementing async commit | |
1184 | * | |
1185 | * For now the atomic helpers don't support async commit directly. If there is | |
1186 | * real need it could be added though, using the dma-buf fence infrastructure | |
1187 | * for generic synchronization with outstanding rendering. | |
1188 | * | |
1189 | * For now drivers have to implement async commit themselves, with the following | |
1190 | * sequence being the recommended one: | |
1191 | * | |
1192 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
1193 | * which commit needs to call which can fail, so we want to run it first and | |
1194 | * synchronously. | |
1195 | * | |
1196 | * 2. Synchronize with any outstanding asynchronous commit worker threads which | |
1197 | * might be affected the new state update. This can be done by either cancelling | |
1198 | * or flushing the work items, depending upon whether the driver can deal with | |
1199 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
1200 | * cleanup is still done when cancelling. | |
1201 | * | |
1202 | * For sufficient parallelism it is recommended to have a work item per crtc | |
1203 | * (for updates which don't touch global state) and a global one. Then we only | |
1204 | * need to synchronize with the crtc work items for changed crtcs and the global | |
1205 | * work item, which allows nice concurrent updates on disjoint sets of crtcs. | |
1206 | * | |
1207 | * 3. The software state is updated synchronously with | |
26196f7e | 1208 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
e8c833a7 DV |
1209 | * locks means concurrent callers never see inconsistent state. And doing this |
1210 | * while it's guaranteed that no relevant async worker runs means that async | |
1211 | * workers do not need grab any locks. Actually they must not grab locks, for | |
1212 | * otherwise the work flushing will deadlock. | |
1213 | * | |
1214 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1215 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1216 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
1217 | * being displayed. | |
1218 | */ | |
1219 | ||
c2fcd274 | 1220 | /** |
2e3afd47 | 1221 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 1222 | * @dev: DRM device |
2e3afd47 | 1223 | * @state: atomic state object with new state structures |
c2fcd274 DV |
1224 | * |
1225 | * This function prepares plane state, specifically framebuffers, for the new | |
1226 | * configuration. If any failure is encountered this function will call | |
1227 | * ->cleanup_fb on any already successfully prepared framebuffer. | |
1228 | * | |
1229 | * Returns: | |
1230 | * 0 on success, negative error code on failure. | |
1231 | */ | |
1232 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
1233 | struct drm_atomic_state *state) | |
1234 | { | |
1235 | int nplanes = dev->mode_config.num_total_plane; | |
1236 | int ret, i; | |
1237 | ||
1238 | for (i = 0; i < nplanes; i++) { | |
b5ceff20 | 1239 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1240 | struct drm_plane *plane = state->planes[i]; |
d136dfee | 1241 | struct drm_plane_state *plane_state = state->plane_states[i]; |
c2fcd274 DV |
1242 | |
1243 | if (!plane) | |
1244 | continue; | |
1245 | ||
1246 | funcs = plane->helper_private; | |
1247 | ||
844f9111 ML |
1248 | if (funcs->prepare_fb) { |
1249 | ret = funcs->prepare_fb(plane, plane_state); | |
c2fcd274 DV |
1250 | if (ret) |
1251 | goto fail; | |
1252 | } | |
1253 | } | |
1254 | ||
1255 | return 0; | |
1256 | ||
1257 | fail: | |
1258 | for (i--; i >= 0; i--) { | |
b5ceff20 | 1259 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1260 | struct drm_plane *plane = state->planes[i]; |
d136dfee | 1261 | struct drm_plane_state *plane_state = state->plane_states[i]; |
c2fcd274 DV |
1262 | |
1263 | if (!plane) | |
1264 | continue; | |
1265 | ||
1266 | funcs = plane->helper_private; | |
1267 | ||
844f9111 ML |
1268 | if (funcs->cleanup_fb) |
1269 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1270 | |
1271 | } | |
1272 | ||
1273 | return ret; | |
1274 | } | |
1275 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
1276 | ||
aef9dbb8 DV |
1277 | bool plane_crtc_active(struct drm_plane_state *state) |
1278 | { | |
1279 | return state->crtc && state->crtc->state->active; | |
1280 | } | |
1281 | ||
c2fcd274 DV |
1282 | /** |
1283 | * drm_atomic_helper_commit_planes - commit plane state | |
1284 | * @dev: DRM device | |
b0fcfc89 | 1285 | * @old_state: atomic state object with old state structures |
aef9dbb8 | 1286 | * @active_only: Only commit on active CRTC if set |
c2fcd274 DV |
1287 | * |
1288 | * This function commits the new plane state using the plane and atomic helper | |
1289 | * functions for planes and crtcs. It assumes that the atomic state has already | |
1290 | * been pushed into the relevant object state pointers, since this step can no | |
1291 | * longer fail. | |
1292 | * | |
b0fcfc89 | 1293 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 | 1294 | * crtcs need to be updated though. |
de28d021 ML |
1295 | * |
1296 | * Note that this function does all plane updates across all CRTCs in one step. | |
1297 | * If the hardware can't support this approach look at | |
1298 | * drm_atomic_helper_commit_planes_on_crtc() instead. | |
6e48ae32 DV |
1299 | * |
1300 | * Plane parameters can be updated by applications while the associated CRTC is | |
1301 | * disabled. The DRM/KMS core will store the parameters in the plane state, | |
1302 | * which will be available to the driver when the CRTC is turned on. As a result | |
1303 | * most drivers don't need to be immediately notified of plane updates for a | |
1304 | * disabled CRTC. | |
1305 | * | |
1306 | * Unless otherwise needed, drivers are advised to set the @active_only | |
1307 | * parameters to true in order not to receive plane update notifications related | |
1308 | * to a disabled CRTC. This avoids the need to manually ignore plane updates in | |
1309 | * driver code when the driver and/or hardware can't or just don't need to deal | |
1310 | * with updates on disabled CRTCs, for example when supporting runtime PM. | |
1311 | * | |
1312 | * The drm_atomic_helper_commit() default implementation only sets @active_only | |
1313 | * to false to most closely match the behaviour of the legacy helpers. This should | |
1314 | * not be copied blindly by drivers. | |
c2fcd274 DV |
1315 | */ |
1316 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
aef9dbb8 DV |
1317 | struct drm_atomic_state *old_state, |
1318 | bool active_only) | |
c2fcd274 | 1319 | { |
df63b999 ACO |
1320 | struct drm_crtc *crtc; |
1321 | struct drm_crtc_state *old_crtc_state; | |
1322 | struct drm_plane *plane; | |
1323 | struct drm_plane_state *old_plane_state; | |
c2fcd274 DV |
1324 | int i; |
1325 | ||
df63b999 | 1326 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1327 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1328 | |
1329 | funcs = crtc->helper_private; | |
1330 | ||
1331 | if (!funcs || !funcs->atomic_begin) | |
1332 | continue; | |
1333 | ||
aef9dbb8 DV |
1334 | if (active_only && !crtc->state->active) |
1335 | continue; | |
1336 | ||
613d2b27 | 1337 | funcs->atomic_begin(crtc, old_crtc_state); |
c2fcd274 DV |
1338 | } |
1339 | ||
df63b999 | 1340 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
b5ceff20 | 1341 | const struct drm_plane_helper_funcs *funcs; |
216c59d6 | 1342 | bool disabling; |
c2fcd274 DV |
1343 | |
1344 | funcs = plane->helper_private; | |
1345 | ||
3cad4b68 | 1346 | if (!funcs) |
c2fcd274 DV |
1347 | continue; |
1348 | ||
216c59d6 LP |
1349 | disabling = drm_atomic_plane_disabling(plane, old_plane_state); |
1350 | ||
1351 | if (active_only) { | |
1352 | /* | |
1353 | * Skip planes related to inactive CRTCs. If the plane | |
1354 | * is enabled use the state of the current CRTC. If the | |
1355 | * plane is being disabled use the state of the old | |
1356 | * CRTC to avoid skipping planes being disabled on an | |
1357 | * active CRTC. | |
1358 | */ | |
1359 | if (!disabling && !plane_crtc_active(plane->state)) | |
1360 | continue; | |
1361 | if (disabling && !plane_crtc_active(old_plane_state)) | |
1362 | continue; | |
1363 | } | |
aef9dbb8 | 1364 | |
407b8bd9 TR |
1365 | /* |
1366 | * Special-case disabling the plane if drivers support it. | |
1367 | */ | |
216c59d6 | 1368 | if (disabling && funcs->atomic_disable) |
407b8bd9 | 1369 | funcs->atomic_disable(plane, old_plane_state); |
216c59d6 | 1370 | else if (plane->state->crtc || disabling) |
407b8bd9 | 1371 | funcs->atomic_update(plane, old_plane_state); |
c2fcd274 DV |
1372 | } |
1373 | ||
df63b999 | 1374 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1375 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1376 | |
1377 | funcs = crtc->helper_private; | |
1378 | ||
1379 | if (!funcs || !funcs->atomic_flush) | |
1380 | continue; | |
1381 | ||
aef9dbb8 DV |
1382 | if (active_only && !crtc->state->active) |
1383 | continue; | |
1384 | ||
613d2b27 | 1385 | funcs->atomic_flush(crtc, old_crtc_state); |
c2fcd274 DV |
1386 | } |
1387 | } | |
1388 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1389 | ||
de28d021 ML |
1390 | /** |
1391 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc | |
1392 | * @old_crtc_state: atomic state object with the old crtc state | |
1393 | * | |
1394 | * This function commits the new plane state using the plane and atomic helper | |
1395 | * functions for planes on the specific crtc. It assumes that the atomic state | |
1396 | * has already been pushed into the relevant object state pointers, since this | |
1397 | * step can no longer fail. | |
1398 | * | |
1399 | * This function is useful when plane updates should be done crtc-by-crtc | |
1400 | * instead of one global step like drm_atomic_helper_commit_planes() does. | |
1401 | * | |
1402 | * This function can only be savely used when planes are not allowed to move | |
1403 | * between different CRTCs because this function doesn't handle inter-CRTC | |
1404 | * depencies. Callers need to ensure that either no such depencies exist, | |
1405 | * resolve them through ordering of commit calls or through some other means. | |
1406 | */ | |
1407 | void | |
1408 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) | |
1409 | { | |
1410 | const struct drm_crtc_helper_funcs *crtc_funcs; | |
1411 | struct drm_crtc *crtc = old_crtc_state->crtc; | |
1412 | struct drm_atomic_state *old_state = old_crtc_state->state; | |
1413 | struct drm_plane *plane; | |
1414 | unsigned plane_mask; | |
1415 | ||
1416 | plane_mask = old_crtc_state->plane_mask; | |
1417 | plane_mask |= crtc->state->plane_mask; | |
1418 | ||
1419 | crtc_funcs = crtc->helper_private; | |
1420 | if (crtc_funcs && crtc_funcs->atomic_begin) | |
613d2b27 | 1421 | crtc_funcs->atomic_begin(crtc, old_crtc_state); |
de28d021 ML |
1422 | |
1423 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { | |
1424 | struct drm_plane_state *old_plane_state = | |
1425 | drm_atomic_get_existing_plane_state(old_state, plane); | |
1426 | const struct drm_plane_helper_funcs *plane_funcs; | |
1427 | ||
1428 | plane_funcs = plane->helper_private; | |
1429 | ||
1430 | if (!old_plane_state || !plane_funcs) | |
1431 | continue; | |
1432 | ||
1433 | WARN_ON(plane->state->crtc && plane->state->crtc != crtc); | |
1434 | ||
1435 | if (drm_atomic_plane_disabling(plane, old_plane_state) && | |
1436 | plane_funcs->atomic_disable) | |
1437 | plane_funcs->atomic_disable(plane, old_plane_state); | |
1438 | else if (plane->state->crtc || | |
1439 | drm_atomic_plane_disabling(plane, old_plane_state)) | |
1440 | plane_funcs->atomic_update(plane, old_plane_state); | |
1441 | } | |
1442 | ||
1443 | if (crtc_funcs && crtc_funcs->atomic_flush) | |
613d2b27 | 1444 | crtc_funcs->atomic_flush(crtc, old_crtc_state); |
de28d021 ML |
1445 | } |
1446 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); | |
1447 | ||
6753ba97 JS |
1448 | /** |
1449 | * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes | |
1450 | * @crtc: CRTC | |
1451 | * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks | |
1452 | * | |
1453 | * Disables all planes associated with the given CRTC. This can be | |
1454 | * used for instance in the CRTC helper disable callback to disable | |
1455 | * all planes before shutting down the display pipeline. | |
1456 | * | |
1457 | * If the atomic-parameter is set the function calls the CRTC's | |
1458 | * atomic_begin hook before and atomic_flush hook after disabling the | |
1459 | * planes. | |
1460 | * | |
1461 | * It is a bug to call this function without having implemented the | |
1462 | * ->atomic_disable() plane hook. | |
1463 | */ | |
1464 | void drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc *crtc, | |
1465 | bool atomic) | |
1466 | { | |
1467 | const struct drm_crtc_helper_funcs *crtc_funcs = | |
1468 | crtc->helper_private; | |
1469 | struct drm_plane *plane; | |
1470 | ||
1471 | if (atomic && crtc_funcs && crtc_funcs->atomic_begin) | |
1472 | crtc_funcs->atomic_begin(crtc, NULL); | |
1473 | ||
1474 | drm_for_each_plane(plane, crtc->dev) { | |
1475 | const struct drm_plane_helper_funcs *plane_funcs = | |
1476 | plane->helper_private; | |
1477 | ||
1478 | if (plane->state->crtc != crtc || !plane_funcs) | |
1479 | continue; | |
1480 | ||
1481 | WARN_ON(!plane_funcs->atomic_disable); | |
1482 | if (plane_funcs->atomic_disable) | |
1483 | plane_funcs->atomic_disable(plane, NULL); | |
1484 | } | |
1485 | ||
1486 | if (atomic && crtc_funcs && crtc_funcs->atomic_flush) | |
1487 | crtc_funcs->atomic_flush(crtc, NULL); | |
1488 | } | |
1489 | EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); | |
1490 | ||
c2fcd274 DV |
1491 | /** |
1492 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1493 | * @dev: DRM device | |
1494 | * @old_state: atomic state object with old state structures | |
1495 | * | |
1496 | * This function cleans up plane state, specifically framebuffers, from the old | |
1497 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1498 | * be able to call this function. | |
1499 | * | |
1500 | * This function must also be called on the new state when the atomic update | |
1501 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1502 | */ | |
1503 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1504 | struct drm_atomic_state *old_state) | |
1505 | { | |
df63b999 ACO |
1506 | struct drm_plane *plane; |
1507 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
1508 | int i; |
1509 | ||
df63b999 | 1510 | for_each_plane_in_state(old_state, plane, plane_state, i) { |
b5ceff20 | 1511 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1512 | |
c2fcd274 DV |
1513 | funcs = plane->helper_private; |
1514 | ||
844f9111 ML |
1515 | if (funcs->cleanup_fb) |
1516 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1517 | } |
1518 | } | |
1519 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1520 | ||
1521 | /** | |
1522 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
1523 | * @dev: DRM device | |
1524 | * @state: atomic state | |
1525 | * | |
1526 | * This function stores the atomic state into the current state pointers in all | |
1527 | * driver objects. It should be called after all failing steps have been done | |
1528 | * and succeeded, but before the actual hardware state is committed. | |
1529 | * | |
1530 | * For cleanup and error recovery the current state for all changed objects will | |
1531 | * be swaped into @state. | |
1532 | * | |
1533 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1534 | * | |
1535 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1536 | * | |
1537 | * 2. Do any other steps that might fail. | |
1538 | * | |
1539 | * 3. Put the staged state into the current state pointers with this function. | |
1540 | * | |
1541 | * 4. Actually commit the hardware state. | |
1542 | * | |
26196f7e | 1543 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
c2fcd274 DV |
1544 | * contains the old state. Also do any other cleanup required with that state. |
1545 | */ | |
1546 | void drm_atomic_helper_swap_state(struct drm_device *dev, | |
1547 | struct drm_atomic_state *state) | |
1548 | { | |
1549 | int i; | |
1550 | ||
1551 | for (i = 0; i < dev->mode_config.num_connector; i++) { | |
1552 | struct drm_connector *connector = state->connectors[i]; | |
1553 | ||
1554 | if (!connector) | |
1555 | continue; | |
1556 | ||
1557 | connector->state->state = state; | |
1558 | swap(state->connector_states[i], connector->state); | |
1559 | connector->state->state = NULL; | |
1560 | } | |
1561 | ||
1562 | for (i = 0; i < dev->mode_config.num_crtc; i++) { | |
1563 | struct drm_crtc *crtc = state->crtcs[i]; | |
1564 | ||
1565 | if (!crtc) | |
1566 | continue; | |
1567 | ||
1568 | crtc->state->state = state; | |
1569 | swap(state->crtc_states[i], crtc->state); | |
1570 | crtc->state->state = NULL; | |
1571 | } | |
1572 | ||
1573 | for (i = 0; i < dev->mode_config.num_total_plane; i++) { | |
1574 | struct drm_plane *plane = state->planes[i]; | |
1575 | ||
1576 | if (!plane) | |
1577 | continue; | |
1578 | ||
1579 | plane->state->state = state; | |
1580 | swap(state->plane_states[i], plane->state); | |
1581 | plane->state->state = NULL; | |
1582 | } | |
1583 | } | |
1584 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
1585 | |
1586 | /** | |
1587 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
1588 | * @plane: plane object to update | |
1589 | * @crtc: owning CRTC of owning plane | |
1590 | * @fb: framebuffer to flip onto plane | |
1591 | * @crtc_x: x offset of primary plane on crtc | |
1592 | * @crtc_y: y offset of primary plane on crtc | |
1593 | * @crtc_w: width of primary plane rectangle on crtc | |
1594 | * @crtc_h: height of primary plane rectangle on crtc | |
1595 | * @src_x: x offset of @fb for panning | |
1596 | * @src_y: y offset of @fb for panning | |
1597 | * @src_w: width of source rectangle in @fb | |
1598 | * @src_h: height of source rectangle in @fb | |
1599 | * | |
1600 | * Provides a default plane update handler using the atomic driver interface. | |
1601 | * | |
1602 | * RETURNS: | |
1603 | * Zero on success, error code on failure | |
1604 | */ | |
1605 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
1606 | struct drm_crtc *crtc, | |
1607 | struct drm_framebuffer *fb, | |
1608 | int crtc_x, int crtc_y, | |
1609 | unsigned int crtc_w, unsigned int crtc_h, | |
1610 | uint32_t src_x, uint32_t src_y, | |
1611 | uint32_t src_w, uint32_t src_h) | |
1612 | { | |
1613 | struct drm_atomic_state *state; | |
1614 | struct drm_plane_state *plane_state; | |
1615 | int ret = 0; | |
1616 | ||
1617 | state = drm_atomic_state_alloc(plane->dev); | |
1618 | if (!state) | |
1619 | return -ENOMEM; | |
1620 | ||
1621 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1622 | retry: | |
1623 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1624 | if (IS_ERR(plane_state)) { | |
1625 | ret = PTR_ERR(plane_state); | |
1626 | goto fail; | |
1627 | } | |
1628 | ||
07cc0ef6 | 1629 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
1630 | if (ret != 0) |
1631 | goto fail; | |
321ebf04 | 1632 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
1633 | plane_state->crtc_x = crtc_x; |
1634 | plane_state->crtc_y = crtc_y; | |
042652ed | 1635 | plane_state->crtc_w = crtc_w; |
02e6f379 | 1636 | plane_state->crtc_h = crtc_h; |
042652ed DV |
1637 | plane_state->src_x = src_x; |
1638 | plane_state->src_y = src_y; | |
042652ed | 1639 | plane_state->src_w = src_w; |
02e6f379 | 1640 | plane_state->src_h = src_h; |
042652ed | 1641 | |
3671c580 DV |
1642 | if (plane == crtc->cursor) |
1643 | state->legacy_cursor_update = true; | |
1644 | ||
042652ed DV |
1645 | ret = drm_atomic_commit(state); |
1646 | if (ret != 0) | |
1647 | goto fail; | |
1648 | ||
1649 | /* Driver takes ownership of state on successful commit. */ | |
1650 | return 0; | |
1651 | fail: | |
1652 | if (ret == -EDEADLK) | |
1653 | goto backoff; | |
1654 | ||
1655 | drm_atomic_state_free(state); | |
1656 | ||
1657 | return ret; | |
1658 | backoff: | |
042652ed | 1659 | drm_atomic_state_clear(state); |
6f75cea6 | 1660 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1661 | |
1662 | /* | |
1663 | * Someone might have exchanged the framebuffer while we dropped locks | |
1664 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1665 | * core does for us. | |
1666 | */ | |
1667 | plane->old_fb = plane->fb; | |
1668 | ||
1669 | goto retry; | |
1670 | } | |
1671 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
1672 | ||
1673 | /** | |
1674 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
1675 | * @plane: plane to disable | |
1676 | * | |
1677 | * Provides a default plane disable handler using the atomic driver interface. | |
1678 | * | |
1679 | * RETURNS: | |
1680 | * Zero on success, error code on failure | |
1681 | */ | |
1682 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
1683 | { | |
1684 | struct drm_atomic_state *state; | |
1685 | struct drm_plane_state *plane_state; | |
1686 | int ret = 0; | |
1687 | ||
aa54e2ee JSP |
1688 | /* |
1689 | * FIXME: Without plane->crtc set we can't get at the implicit legacy | |
1690 | * acquire context. The real fix will be to wire the acquire ctx through | |
1691 | * everywhere we need it, but meanwhile prevent chaos by just skipping | |
1692 | * this noop. The critical case is the cursor ioctls which a) only grab | |
1693 | * crtc/cursor-plane locks (so we need the crtc to get at the right | |
1694 | * acquire context) and b) can try to disable the plane multiple times. | |
1695 | */ | |
1696 | if (!plane->crtc) | |
1697 | return 0; | |
1698 | ||
042652ed DV |
1699 | state = drm_atomic_state_alloc(plane->dev); |
1700 | if (!state) | |
1701 | return -ENOMEM; | |
1702 | ||
1703 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
1704 | retry: | |
1705 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1706 | if (IS_ERR(plane_state)) { | |
1707 | ret = PTR_ERR(plane_state); | |
1708 | goto fail; | |
1709 | } | |
1710 | ||
24e79d0d ML |
1711 | if (plane_state->crtc && (plane == plane->crtc->cursor)) |
1712 | plane_state->state->legacy_cursor_update = true; | |
1713 | ||
bbb1e524 | 1714 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
042652ed DV |
1715 | if (ret != 0) |
1716 | goto fail; | |
f02ad907 | 1717 | |
042652ed DV |
1718 | ret = drm_atomic_commit(state); |
1719 | if (ret != 0) | |
1720 | goto fail; | |
1721 | ||
1722 | /* Driver takes ownership of state on successful commit. */ | |
1723 | return 0; | |
1724 | fail: | |
1725 | if (ret == -EDEADLK) | |
1726 | goto backoff; | |
1727 | ||
1728 | drm_atomic_state_free(state); | |
1729 | ||
1730 | return ret; | |
1731 | backoff: | |
042652ed | 1732 | drm_atomic_state_clear(state); |
6f75cea6 | 1733 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1734 | |
1735 | /* | |
1736 | * Someone might have exchanged the framebuffer while we dropped locks | |
1737 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1738 | * core does for us. | |
1739 | */ | |
1740 | plane->old_fb = plane->fb; | |
1741 | ||
1742 | goto retry; | |
1743 | } | |
1744 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
1745 | ||
bbb1e524 RC |
1746 | /* just used from fb-helper and atomic-helper: */ |
1747 | int __drm_atomic_helper_disable_plane(struct drm_plane *plane, | |
1748 | struct drm_plane_state *plane_state) | |
1749 | { | |
1750 | int ret; | |
1751 | ||
1752 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
1753 | if (ret != 0) | |
1754 | return ret; | |
1755 | ||
1756 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
1757 | plane_state->crtc_x = 0; | |
1758 | plane_state->crtc_y = 0; | |
bbb1e524 | 1759 | plane_state->crtc_w = 0; |
02e6f379 | 1760 | plane_state->crtc_h = 0; |
bbb1e524 RC |
1761 | plane_state->src_x = 0; |
1762 | plane_state->src_y = 0; | |
bbb1e524 | 1763 | plane_state->src_w = 0; |
02e6f379 | 1764 | plane_state->src_h = 0; |
bbb1e524 | 1765 | |
bbb1e524 RC |
1766 | return 0; |
1767 | } | |
1768 | ||
042652ed DV |
1769 | static int update_output_state(struct drm_atomic_state *state, |
1770 | struct drm_mode_set *set) | |
1771 | { | |
1772 | struct drm_device *dev = set->crtc->dev; | |
df63b999 ACO |
1773 | struct drm_crtc *crtc; |
1774 | struct drm_crtc_state *crtc_state; | |
1775 | struct drm_connector *connector; | |
042652ed | 1776 | struct drm_connector_state *conn_state; |
6ab520a2 | 1777 | int ret, i; |
042652ed DV |
1778 | |
1779 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
1780 | state->acquire_ctx); | |
1781 | if (ret) | |
1782 | return ret; | |
1783 | ||
6ab520a2 ML |
1784 | /* First disable all connectors on the target crtc. */ |
1785 | ret = drm_atomic_add_affected_connectors(state, set->crtc); | |
1786 | if (ret) | |
1787 | return ret; | |
042652ed | 1788 | |
df63b999 | 1789 | for_each_connector_in_state(state, connector, conn_state, i) { |
042652ed DV |
1790 | if (conn_state->crtc == set->crtc) { |
1791 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1792 | NULL); | |
1793 | if (ret) | |
1794 | return ret; | |
1795 | } | |
6ab520a2 | 1796 | } |
042652ed | 1797 | |
6ab520a2 ML |
1798 | /* Then set all connectors from set->connectors on the target crtc */ |
1799 | for (i = 0; i < set->num_connectors; i++) { | |
1800 | conn_state = drm_atomic_get_connector_state(state, | |
1801 | set->connectors[i]); | |
1802 | if (IS_ERR(conn_state)) | |
1803 | return PTR_ERR(conn_state); | |
1804 | ||
1805 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1806 | set->crtc); | |
1807 | if (ret) | |
1808 | return ret; | |
042652ed DV |
1809 | } |
1810 | ||
df63b999 | 1811 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
1812 | /* Don't update ->enable for the CRTC in the set_config request, |
1813 | * since a mismatch would indicate a bug in the upper layers. | |
1814 | * The actual modeset code later on will catch any | |
1815 | * inconsistencies here. */ | |
1816 | if (crtc == set->crtc) | |
1817 | continue; | |
1818 | ||
14de6c44 | 1819 | if (!crtc_state->connector_mask) { |
c30f55a7 LP |
1820 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, |
1821 | NULL); | |
1822 | if (ret < 0) | |
1823 | return ret; | |
1824 | ||
9b5edbf7 | 1825 | crtc_state->active = false; |
c30f55a7 | 1826 | } |
042652ed DV |
1827 | } |
1828 | ||
1829 | return 0; | |
1830 | } | |
1831 | ||
1832 | /** | |
1833 | * drm_atomic_helper_set_config - set a new config from userspace | |
1834 | * @set: mode set configuration | |
1835 | * | |
1836 | * Provides a default crtc set_config handler using the atomic driver interface. | |
1837 | * | |
1838 | * Returns: | |
1839 | * Returns 0 on success, negative errno numbers on failure. | |
1840 | */ | |
1841 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
1842 | { | |
1843 | struct drm_atomic_state *state; | |
1844 | struct drm_crtc *crtc = set->crtc; | |
042652ed DV |
1845 | int ret = 0; |
1846 | ||
1847 | state = drm_atomic_state_alloc(crtc->dev); | |
1848 | if (!state) | |
1849 | return -ENOMEM; | |
1850 | ||
40616a26 | 1851 | state->legacy_set_config = true; |
042652ed DV |
1852 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); |
1853 | retry: | |
bbb1e524 RC |
1854 | ret = __drm_atomic_helper_set_config(set, state); |
1855 | if (ret != 0) | |
042652ed | 1856 | goto fail; |
042652ed | 1857 | |
bbb1e524 RC |
1858 | ret = drm_atomic_commit(state); |
1859 | if (ret != 0) | |
e5b5341c | 1860 | goto fail; |
bbb1e524 RC |
1861 | |
1862 | /* Driver takes ownership of state on successful commit. */ | |
1863 | return 0; | |
1864 | fail: | |
1865 | if (ret == -EDEADLK) | |
1866 | goto backoff; | |
1867 | ||
1868 | drm_atomic_state_free(state); | |
1869 | ||
1870 | return ret; | |
1871 | backoff: | |
1872 | drm_atomic_state_clear(state); | |
1873 | drm_atomic_legacy_backoff(state); | |
1874 | ||
1875 | /* | |
1876 | * Someone might have exchanged the framebuffer while we dropped locks | |
1877 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1878 | * core does for us. | |
1879 | */ | |
1880 | crtc->primary->old_fb = crtc->primary->fb; | |
1881 | ||
1882 | goto retry; | |
1883 | } | |
1884 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
1885 | ||
1886 | /* just used from fb-helper and atomic-helper: */ | |
1887 | int __drm_atomic_helper_set_config(struct drm_mode_set *set, | |
1888 | struct drm_atomic_state *state) | |
1889 | { | |
1890 | struct drm_crtc_state *crtc_state; | |
1891 | struct drm_plane_state *primary_state; | |
1892 | struct drm_crtc *crtc = set->crtc; | |
83926117 | 1893 | int hdisplay, vdisplay; |
bbb1e524 RC |
1894 | int ret; |
1895 | ||
1896 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1897 | if (IS_ERR(crtc_state)) | |
1898 | return PTR_ERR(crtc_state); | |
1899 | ||
1900 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); | |
1901 | if (IS_ERR(primary_state)) | |
1902 | return PTR_ERR(primary_state); | |
e5b5341c | 1903 | |
042652ed DV |
1904 | if (!set->mode) { |
1905 | WARN_ON(set->fb); | |
1906 | WARN_ON(set->num_connectors); | |
1907 | ||
819364da DS |
1908 | ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); |
1909 | if (ret != 0) | |
bbb1e524 | 1910 | return ret; |
819364da | 1911 | |
eab3bbef | 1912 | crtc_state->active = false; |
e5b5341c | 1913 | |
07cc0ef6 | 1914 | ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
e5b5341c | 1915 | if (ret != 0) |
bbb1e524 | 1916 | return ret; |
e5b5341c RC |
1917 | |
1918 | drm_atomic_set_fb_for_plane(primary_state, NULL); | |
1919 | ||
042652ed DV |
1920 | goto commit; |
1921 | } | |
1922 | ||
1923 | WARN_ON(!set->fb); | |
1924 | WARN_ON(!set->num_connectors); | |
1925 | ||
819364da DS |
1926 | ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); |
1927 | if (ret != 0) | |
bbb1e524 | 1928 | return ret; |
819364da | 1929 | |
eab3bbef | 1930 | crtc_state->active = true; |
042652ed | 1931 | |
07cc0ef6 | 1932 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
042652ed | 1933 | if (ret != 0) |
bbb1e524 RC |
1934 | return ret; |
1935 | ||
83926117 VS |
1936 | drm_crtc_get_hv_timing(set->mode, &hdisplay, &vdisplay); |
1937 | ||
321ebf04 | 1938 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
042652ed DV |
1939 | primary_state->crtc_x = 0; |
1940 | primary_state->crtc_y = 0; | |
83926117 | 1941 | primary_state->crtc_w = hdisplay; |
02e6f379 | 1942 | primary_state->crtc_h = vdisplay; |
042652ed DV |
1943 | primary_state->src_x = set->x << 16; |
1944 | primary_state->src_y = set->y << 16; | |
41121248 | 1945 | if (primary_state->rotation & (BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270))) { |
83926117 | 1946 | primary_state->src_w = vdisplay << 16; |
02e6f379 | 1947 | primary_state->src_h = hdisplay << 16; |
41121248 | 1948 | } else { |
83926117 | 1949 | primary_state->src_w = hdisplay << 16; |
02e6f379 | 1950 | primary_state->src_h = vdisplay << 16; |
41121248 | 1951 | } |
042652ed DV |
1952 | |
1953 | commit: | |
1954 | ret = update_output_state(state, set); | |
1955 | if (ret) | |
bbb1e524 | 1956 | return ret; |
042652ed | 1957 | |
042652ed | 1958 | return 0; |
042652ed | 1959 | } |
042652ed | 1960 | |
14942760 TR |
1961 | /** |
1962 | * drm_atomic_helper_disable_all - disable all currently active outputs | |
1963 | * @dev: DRM device | |
1964 | * @ctx: lock acquisition context | |
1965 | * | |
1966 | * Loops through all connectors, finding those that aren't turned off and then | |
1967 | * turns them off by setting their DPMS mode to OFF and deactivating the CRTC | |
1968 | * that they are connected to. | |
1969 | * | |
1970 | * This is used for example in suspend/resume to disable all currently active | |
1971 | * functions when suspending. | |
1972 | * | |
1973 | * Note that if callers haven't already acquired all modeset locks this might | |
1974 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
1975 | * | |
1976 | * Returns: | |
1977 | * 0 on success or a negative error code on failure. | |
1978 | * | |
1979 | * See also: | |
1980 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
1981 | */ | |
1982 | int drm_atomic_helper_disable_all(struct drm_device *dev, | |
1983 | struct drm_modeset_acquire_ctx *ctx) | |
1984 | { | |
1985 | struct drm_atomic_state *state; | |
1986 | struct drm_connector *conn; | |
1987 | int err; | |
1988 | ||
1989 | state = drm_atomic_state_alloc(dev); | |
1990 | if (!state) | |
1991 | return -ENOMEM; | |
1992 | ||
1993 | state->acquire_ctx = ctx; | |
1994 | ||
1995 | drm_for_each_connector(conn, dev) { | |
1996 | struct drm_crtc *crtc = conn->state->crtc; | |
1997 | struct drm_crtc_state *crtc_state; | |
1998 | ||
1999 | if (!crtc || conn->dpms != DRM_MODE_DPMS_ON) | |
2000 | continue; | |
2001 | ||
2002 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2003 | if (IS_ERR(crtc_state)) { | |
2004 | err = PTR_ERR(crtc_state); | |
2005 | goto free; | |
2006 | } | |
2007 | ||
2008 | crtc_state->active = false; | |
2009 | } | |
2010 | ||
2011 | err = drm_atomic_commit(state); | |
2012 | ||
2013 | free: | |
2014 | if (err < 0) | |
2015 | drm_atomic_state_free(state); | |
2016 | ||
2017 | return err; | |
2018 | } | |
2019 | EXPORT_SYMBOL(drm_atomic_helper_disable_all); | |
2020 | ||
2021 | /** | |
2022 | * drm_atomic_helper_suspend - subsystem-level suspend helper | |
2023 | * @dev: DRM device | |
2024 | * | |
2025 | * Duplicates the current atomic state, disables all active outputs and then | |
2026 | * returns a pointer to the original atomic state to the caller. Drivers can | |
2027 | * pass this pointer to the drm_atomic_helper_resume() helper upon resume to | |
2028 | * restore the output configuration that was active at the time the system | |
2029 | * entered suspend. | |
2030 | * | |
2031 | * Note that it is potentially unsafe to use this. The atomic state object | |
2032 | * returned by this function is assumed to be persistent. Drivers must ensure | |
2033 | * that this holds true. Before calling this function, drivers must make sure | |
2034 | * to suspend fbdev emulation so that nothing can be using the device. | |
2035 | * | |
2036 | * Returns: | |
2037 | * A pointer to a copy of the state before suspend on success or an ERR_PTR()- | |
2038 | * encoded error code on failure. Drivers should store the returned atomic | |
2039 | * state object and pass it to the drm_atomic_helper_resume() helper upon | |
2040 | * resume. | |
2041 | * | |
2042 | * See also: | |
2043 | * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), | |
2044 | * drm_atomic_helper_resume() | |
2045 | */ | |
2046 | struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) | |
2047 | { | |
2048 | struct drm_modeset_acquire_ctx ctx; | |
2049 | struct drm_atomic_state *state; | |
2050 | int err; | |
2051 | ||
2052 | drm_modeset_acquire_init(&ctx, 0); | |
2053 | ||
2054 | retry: | |
2055 | err = drm_modeset_lock_all_ctx(dev, &ctx); | |
2056 | if (err < 0) { | |
2057 | state = ERR_PTR(err); | |
2058 | goto unlock; | |
2059 | } | |
2060 | ||
2061 | state = drm_atomic_helper_duplicate_state(dev, &ctx); | |
2062 | if (IS_ERR(state)) | |
2063 | goto unlock; | |
2064 | ||
2065 | err = drm_atomic_helper_disable_all(dev, &ctx); | |
2066 | if (err < 0) { | |
2067 | drm_atomic_state_free(state); | |
2068 | state = ERR_PTR(err); | |
2069 | goto unlock; | |
2070 | } | |
2071 | ||
2072 | unlock: | |
2073 | if (PTR_ERR(state) == -EDEADLK) { | |
2074 | drm_modeset_backoff(&ctx); | |
2075 | goto retry; | |
2076 | } | |
2077 | ||
2078 | drm_modeset_drop_locks(&ctx); | |
2079 | drm_modeset_acquire_fini(&ctx); | |
2080 | return state; | |
2081 | } | |
2082 | EXPORT_SYMBOL(drm_atomic_helper_suspend); | |
2083 | ||
2084 | /** | |
2085 | * drm_atomic_helper_resume - subsystem-level resume helper | |
2086 | * @dev: DRM device | |
2087 | * @state: atomic state to resume to | |
2088 | * | |
2089 | * Calls drm_mode_config_reset() to synchronize hardware and software states, | |
2090 | * grabs all modeset locks and commits the atomic state object. This can be | |
2091 | * used in conjunction with the drm_atomic_helper_suspend() helper to | |
2092 | * implement suspend/resume for drivers that support atomic mode-setting. | |
2093 | * | |
2094 | * Returns: | |
2095 | * 0 on success or a negative error code on failure. | |
2096 | * | |
2097 | * See also: | |
2098 | * drm_atomic_helper_suspend() | |
2099 | */ | |
2100 | int drm_atomic_helper_resume(struct drm_device *dev, | |
2101 | struct drm_atomic_state *state) | |
2102 | { | |
2103 | struct drm_mode_config *config = &dev->mode_config; | |
2104 | int err; | |
2105 | ||
2106 | drm_mode_config_reset(dev); | |
2107 | drm_modeset_lock_all(dev); | |
2108 | state->acquire_ctx = config->acquire_ctx; | |
2109 | err = drm_atomic_commit(state); | |
2110 | drm_modeset_unlock_all(dev); | |
2111 | ||
2112 | return err; | |
2113 | } | |
2114 | EXPORT_SYMBOL(drm_atomic_helper_resume); | |
2115 | ||
042652ed | 2116 | /** |
7f50002f | 2117 | * drm_atomic_helper_crtc_set_property - helper for crtc properties |
042652ed DV |
2118 | * @crtc: DRM crtc |
2119 | * @property: DRM property | |
2120 | * @val: value of property | |
2121 | * | |
7f50002f LP |
2122 | * Provides a default crtc set_property handler using the atomic driver |
2123 | * interface. | |
042652ed DV |
2124 | * |
2125 | * RETURNS: | |
2126 | * Zero on success, error code on failure | |
2127 | */ | |
2128 | int | |
2129 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
2130 | struct drm_property *property, | |
2131 | uint64_t val) | |
2132 | { | |
2133 | struct drm_atomic_state *state; | |
2134 | struct drm_crtc_state *crtc_state; | |
2135 | int ret = 0; | |
2136 | ||
2137 | state = drm_atomic_state_alloc(crtc->dev); | |
2138 | if (!state) | |
2139 | return -ENOMEM; | |
2140 | ||
2141 | /* ->set_property is always called with all locks held. */ | |
2142 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
2143 | retry: | |
2144 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2145 | if (IS_ERR(crtc_state)) { | |
2146 | ret = PTR_ERR(crtc_state); | |
2147 | goto fail; | |
2148 | } | |
2149 | ||
40ecc694 RC |
2150 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
2151 | property, val); | |
042652ed DV |
2152 | if (ret) |
2153 | goto fail; | |
2154 | ||
2155 | ret = drm_atomic_commit(state); | |
2156 | if (ret != 0) | |
2157 | goto fail; | |
2158 | ||
2159 | /* Driver takes ownership of state on successful commit. */ | |
2160 | return 0; | |
2161 | fail: | |
2162 | if (ret == -EDEADLK) | |
2163 | goto backoff; | |
2164 | ||
2165 | drm_atomic_state_free(state); | |
2166 | ||
2167 | return ret; | |
2168 | backoff: | |
042652ed | 2169 | drm_atomic_state_clear(state); |
6f75cea6 | 2170 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2171 | |
2172 | goto retry; | |
2173 | } | |
2174 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
2175 | ||
2176 | /** | |
7f50002f | 2177 | * drm_atomic_helper_plane_set_property - helper for plane properties |
042652ed DV |
2178 | * @plane: DRM plane |
2179 | * @property: DRM property | |
2180 | * @val: value of property | |
2181 | * | |
7f50002f LP |
2182 | * Provides a default plane set_property handler using the atomic driver |
2183 | * interface. | |
042652ed DV |
2184 | * |
2185 | * RETURNS: | |
2186 | * Zero on success, error code on failure | |
2187 | */ | |
2188 | int | |
2189 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
2190 | struct drm_property *property, | |
2191 | uint64_t val) | |
2192 | { | |
2193 | struct drm_atomic_state *state; | |
2194 | struct drm_plane_state *plane_state; | |
2195 | int ret = 0; | |
2196 | ||
2197 | state = drm_atomic_state_alloc(plane->dev); | |
2198 | if (!state) | |
2199 | return -ENOMEM; | |
2200 | ||
2201 | /* ->set_property is always called with all locks held. */ | |
2202 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
2203 | retry: | |
2204 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2205 | if (IS_ERR(plane_state)) { | |
2206 | ret = PTR_ERR(plane_state); | |
2207 | goto fail; | |
2208 | } | |
2209 | ||
40ecc694 RC |
2210 | ret = drm_atomic_plane_set_property(plane, plane_state, |
2211 | property, val); | |
042652ed DV |
2212 | if (ret) |
2213 | goto fail; | |
2214 | ||
2215 | ret = drm_atomic_commit(state); | |
2216 | if (ret != 0) | |
2217 | goto fail; | |
2218 | ||
2219 | /* Driver takes ownership of state on successful commit. */ | |
2220 | return 0; | |
2221 | fail: | |
2222 | if (ret == -EDEADLK) | |
2223 | goto backoff; | |
2224 | ||
2225 | drm_atomic_state_free(state); | |
2226 | ||
2227 | return ret; | |
2228 | backoff: | |
042652ed | 2229 | drm_atomic_state_clear(state); |
6f75cea6 | 2230 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2231 | |
2232 | goto retry; | |
2233 | } | |
2234 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
2235 | ||
2236 | /** | |
7f50002f | 2237 | * drm_atomic_helper_connector_set_property - helper for connector properties |
042652ed DV |
2238 | * @connector: DRM connector |
2239 | * @property: DRM property | |
2240 | * @val: value of property | |
2241 | * | |
7f50002f LP |
2242 | * Provides a default connector set_property handler using the atomic driver |
2243 | * interface. | |
042652ed DV |
2244 | * |
2245 | * RETURNS: | |
2246 | * Zero on success, error code on failure | |
2247 | */ | |
2248 | int | |
2249 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
2250 | struct drm_property *property, | |
2251 | uint64_t val) | |
2252 | { | |
2253 | struct drm_atomic_state *state; | |
2254 | struct drm_connector_state *connector_state; | |
2255 | int ret = 0; | |
2256 | ||
2257 | state = drm_atomic_state_alloc(connector->dev); | |
2258 | if (!state) | |
2259 | return -ENOMEM; | |
2260 | ||
2261 | /* ->set_property is always called with all locks held. */ | |
2262 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
2263 | retry: | |
2264 | connector_state = drm_atomic_get_connector_state(state, connector); | |
2265 | if (IS_ERR(connector_state)) { | |
2266 | ret = PTR_ERR(connector_state); | |
2267 | goto fail; | |
2268 | } | |
2269 | ||
40ecc694 RC |
2270 | ret = drm_atomic_connector_set_property(connector, connector_state, |
2271 | property, val); | |
042652ed DV |
2272 | if (ret) |
2273 | goto fail; | |
2274 | ||
2275 | ret = drm_atomic_commit(state); | |
2276 | if (ret != 0) | |
2277 | goto fail; | |
2278 | ||
2279 | /* Driver takes ownership of state on successful commit. */ | |
2280 | return 0; | |
2281 | fail: | |
2282 | if (ret == -EDEADLK) | |
2283 | goto backoff; | |
2284 | ||
2285 | drm_atomic_state_free(state); | |
2286 | ||
2287 | return ret; | |
2288 | backoff: | |
042652ed | 2289 | drm_atomic_state_clear(state); |
6f75cea6 | 2290 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2291 | |
2292 | goto retry; | |
2293 | } | |
2294 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 DV |
2295 | |
2296 | /** | |
2297 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
2298 | * @crtc: DRM crtc | |
2299 | * @fb: DRM framebuffer | |
2300 | * @event: optional DRM event to signal upon completion | |
2301 | * @flags: flip flags for non-vblank sync'ed updates | |
2302 | * | |
2303 | * Provides a default page flip implementation using the atomic driver interface. | |
2304 | * | |
2305 | * Note that for now so called async page flips (i.e. updates which are not | |
2306 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
2307 | * no provisions for this yet. | |
2308 | * | |
2309 | * Returns: | |
2310 | * Returns 0 on success, negative errno numbers on failure. | |
2311 | */ | |
2312 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
2313 | struct drm_framebuffer *fb, | |
2314 | struct drm_pending_vblank_event *event, | |
2315 | uint32_t flags) | |
2316 | { | |
2317 | struct drm_plane *plane = crtc->primary; | |
2318 | struct drm_atomic_state *state; | |
2319 | struct drm_plane_state *plane_state; | |
2320 | struct drm_crtc_state *crtc_state; | |
2321 | int ret = 0; | |
2322 | ||
2323 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
2324 | return -EINVAL; | |
2325 | ||
2326 | state = drm_atomic_state_alloc(plane->dev); | |
2327 | if (!state) | |
2328 | return -ENOMEM; | |
2329 | ||
2330 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2331 | retry: | |
2332 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2333 | if (IS_ERR(crtc_state)) { | |
2334 | ret = PTR_ERR(crtc_state); | |
2335 | goto fail; | |
2336 | } | |
2337 | crtc_state->event = event; | |
2338 | ||
2339 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2340 | if (IS_ERR(plane_state)) { | |
2341 | ret = PTR_ERR(plane_state); | |
2342 | goto fail; | |
2343 | } | |
2344 | ||
07cc0ef6 | 2345 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
8bc0f312 DV |
2346 | if (ret != 0) |
2347 | goto fail; | |
321ebf04 | 2348 | drm_atomic_set_fb_for_plane(plane_state, fb); |
8bc0f312 | 2349 | |
4cba6850 DV |
2350 | /* Make sure we don't accidentally do a full modeset. */ |
2351 | state->allow_modeset = false; | |
2352 | if (!crtc_state->active) { | |
2353 | DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n", | |
2354 | crtc->base.id); | |
2355 | ret = -EINVAL; | |
2356 | goto fail; | |
2357 | } | |
2358 | ||
8bc0f312 DV |
2359 | ret = drm_atomic_async_commit(state); |
2360 | if (ret != 0) | |
2361 | goto fail; | |
2362 | ||
8bc0f312 DV |
2363 | /* Driver takes ownership of state on successful async commit. */ |
2364 | return 0; | |
2365 | fail: | |
2366 | if (ret == -EDEADLK) | |
2367 | goto backoff; | |
2368 | ||
2369 | drm_atomic_state_free(state); | |
2370 | ||
2371 | return ret; | |
2372 | backoff: | |
8bc0f312 | 2373 | drm_atomic_state_clear(state); |
6f75cea6 | 2374 | drm_atomic_legacy_backoff(state); |
8bc0f312 DV |
2375 | |
2376 | /* | |
2377 | * Someone might have exchanged the framebuffer while we dropped locks | |
2378 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2379 | * core does for us. | |
2380 | */ | |
2381 | plane->old_fb = plane->fb; | |
2382 | ||
2383 | goto retry; | |
2384 | } | |
2385 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
d461701c | 2386 | |
b486e0e6 DV |
2387 | /** |
2388 | * drm_atomic_helper_connector_dpms() - connector dpms helper implementation | |
2389 | * @connector: affected connector | |
2390 | * @mode: DPMS mode | |
2391 | * | |
2392 | * This is the main helper function provided by the atomic helper framework for | |
2393 | * implementing the legacy DPMS connector interface. It computes the new desired | |
2394 | * ->active state for the corresponding CRTC (if the connector is enabled) and | |
2395 | * updates it. | |
9a69a9ac ML |
2396 | * |
2397 | * Returns: | |
2398 | * Returns 0 on success, negative errno numbers on failure. | |
b486e0e6 | 2399 | */ |
9a69a9ac ML |
2400 | int drm_atomic_helper_connector_dpms(struct drm_connector *connector, |
2401 | int mode) | |
b486e0e6 DV |
2402 | { |
2403 | struct drm_mode_config *config = &connector->dev->mode_config; | |
2404 | struct drm_atomic_state *state; | |
2405 | struct drm_crtc_state *crtc_state; | |
2406 | struct drm_crtc *crtc; | |
2407 | struct drm_connector *tmp_connector; | |
2408 | int ret; | |
2409 | bool active = false; | |
9a69a9ac | 2410 | int old_mode = connector->dpms; |
b486e0e6 DV |
2411 | |
2412 | if (mode != DRM_MODE_DPMS_ON) | |
2413 | mode = DRM_MODE_DPMS_OFF; | |
2414 | ||
2415 | connector->dpms = mode; | |
2416 | crtc = connector->state->crtc; | |
2417 | ||
2418 | if (!crtc) | |
9a69a9ac | 2419 | return 0; |
b486e0e6 | 2420 | |
b486e0e6 DV |
2421 | state = drm_atomic_state_alloc(connector->dev); |
2422 | if (!state) | |
9a69a9ac | 2423 | return -ENOMEM; |
b486e0e6 DV |
2424 | |
2425 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2426 | retry: | |
2427 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
9a69a9ac ML |
2428 | if (IS_ERR(crtc_state)) { |
2429 | ret = PTR_ERR(crtc_state); | |
2430 | goto fail; | |
2431 | } | |
b486e0e6 DV |
2432 | |
2433 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
2434 | ||
9a9f5ce8 | 2435 | drm_for_each_connector(tmp_connector, connector->dev) { |
0388df05 | 2436 | if (tmp_connector->state->crtc != crtc) |
b486e0e6 DV |
2437 | continue; |
2438 | ||
0388df05 | 2439 | if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { |
b486e0e6 DV |
2440 | active = true; |
2441 | break; | |
2442 | } | |
2443 | } | |
2444 | crtc_state->active = active; | |
2445 | ||
2446 | ret = drm_atomic_commit(state); | |
2447 | if (ret != 0) | |
2448 | goto fail; | |
2449 | ||
9a69a9ac ML |
2450 | /* Driver takes ownership of state on successful commit. */ |
2451 | return 0; | |
b486e0e6 DV |
2452 | fail: |
2453 | if (ret == -EDEADLK) | |
2454 | goto backoff; | |
2455 | ||
9a69a9ac | 2456 | connector->dpms = old_mode; |
b486e0e6 DV |
2457 | drm_atomic_state_free(state); |
2458 | ||
9a69a9ac | 2459 | return ret; |
b486e0e6 DV |
2460 | backoff: |
2461 | drm_atomic_state_clear(state); | |
2462 | drm_atomic_legacy_backoff(state); | |
2463 | ||
2464 | goto retry; | |
2465 | } | |
2466 | EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); | |
2467 | ||
3150c7d0 DV |
2468 | /** |
2469 | * DOC: atomic state reset and initialization | |
2470 | * | |
2471 | * Both the drm core and the atomic helpers assume that there is always the full | |
2472 | * and correct atomic software state for all connectors, CRTCs and planes | |
2473 | * available. Which is a bit a problem on driver load and also after system | |
2474 | * suspend. One way to solve this is to have a hardware state read-out | |
2475 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
2476 | * driver). | |
2477 | * | |
2478 | * The simpler solution is to just reset the software state to everything off, | |
2479 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
2480 | * the atomic helpers provide default reset implementations for all hooks. | |
7f8ee3e5 DV |
2481 | * |
2482 | * On the upside the precise state tracking of atomic simplifies system suspend | |
2483 | * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe | |
2484 | * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume(). | |
2485 | * For other drivers the building blocks are split out, see the documentation | |
2486 | * for these functions. | |
3150c7d0 DV |
2487 | */ |
2488 | ||
d461701c DV |
2489 | /** |
2490 | * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs | |
2491 | * @crtc: drm CRTC | |
2492 | * | |
2493 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
2494 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2495 | */ | |
2496 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
2497 | { | |
5f911905 | 2498 | if (crtc->state) |
99cf4a29 | 2499 | drm_property_unreference_blob(crtc->state->mode_blob); |
d461701c DV |
2500 | kfree(crtc->state); |
2501 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
07cc0ef6 DV |
2502 | |
2503 | if (crtc->state) | |
2504 | crtc->state->crtc = crtc; | |
d461701c DV |
2505 | } |
2506 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
2507 | ||
f5e7840b TR |
2508 | /** |
2509 | * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state | |
2510 | * @crtc: CRTC object | |
2511 | * @state: atomic CRTC state | |
2512 | * | |
2513 | * Copies atomic state from a CRTC's current state and resets inferred values. | |
2514 | * This is useful for drivers that subclass the CRTC state. | |
2515 | */ | |
2516 | void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc, | |
2517 | struct drm_crtc_state *state) | |
2518 | { | |
2519 | memcpy(state, crtc->state, sizeof(*state)); | |
2520 | ||
99cf4a29 DS |
2521 | if (state->mode_blob) |
2522 | drm_property_reference_blob(state->mode_blob); | |
f5e7840b TR |
2523 | state->mode_changed = false; |
2524 | state->active_changed = false; | |
2525 | state->planes_changed = false; | |
fc596660 | 2526 | state->connectors_changed = false; |
f5e7840b TR |
2527 | state->event = NULL; |
2528 | } | |
2529 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state); | |
2530 | ||
d461701c DV |
2531 | /** |
2532 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
2533 | * @crtc: drm CRTC | |
2534 | * | |
2535 | * Default CRTC state duplicate hook for drivers which don't have their own | |
2536 | * subclassed CRTC state structure. | |
2537 | */ | |
2538 | struct drm_crtc_state * | |
2539 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
2540 | { | |
2541 | struct drm_crtc_state *state; | |
2542 | ||
2543 | if (WARN_ON(!crtc->state)) | |
2544 | return NULL; | |
2545 | ||
f5e7840b TR |
2546 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2547 | if (state) | |
2548 | __drm_atomic_helper_crtc_duplicate_state(crtc, state); | |
d461701c DV |
2549 | |
2550 | return state; | |
2551 | } | |
2552 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
2553 | ||
f5e7840b TR |
2554 | /** |
2555 | * __drm_atomic_helper_crtc_destroy_state - release CRTC state | |
2556 | * @crtc: CRTC object | |
2557 | * @state: CRTC state object to release | |
2558 | * | |
2559 | * Releases all resources stored in the CRTC state without actually freeing | |
2560 | * the memory of the CRTC state. This is useful for drivers that subclass the | |
2561 | * CRTC state. | |
2562 | */ | |
2563 | void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
2564 | struct drm_crtc_state *state) | |
2565 | { | |
5f911905 | 2566 | drm_property_unreference_blob(state->mode_blob); |
f5e7840b TR |
2567 | } |
2568 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); | |
2569 | ||
d461701c DV |
2570 | /** |
2571 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
2572 | * @crtc: drm CRTC | |
2573 | * @state: CRTC state object to release | |
2574 | * | |
2575 | * Default CRTC state destroy hook for drivers which don't have their own | |
2576 | * subclassed CRTC state structure. | |
2577 | */ | |
2578 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
2579 | struct drm_crtc_state *state) | |
2580 | { | |
f5e7840b | 2581 | __drm_atomic_helper_crtc_destroy_state(crtc, state); |
d461701c DV |
2582 | kfree(state); |
2583 | } | |
2584 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
2585 | ||
2586 | /** | |
2587 | * drm_atomic_helper_plane_reset - default ->reset hook for planes | |
2588 | * @plane: drm plane | |
2589 | * | |
2590 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
2591 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2592 | */ | |
2593 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
2594 | { | |
321ebf04 DV |
2595 | if (plane->state && plane->state->fb) |
2596 | drm_framebuffer_unreference(plane->state->fb); | |
2597 | ||
d461701c DV |
2598 | kfree(plane->state); |
2599 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
07cc0ef6 | 2600 | |
25aaa3a1 | 2601 | if (plane->state) { |
07cc0ef6 | 2602 | plane->state->plane = plane; |
25aaa3a1 MS |
2603 | plane->state->rotation = BIT(DRM_ROTATE_0); |
2604 | } | |
d461701c DV |
2605 | } |
2606 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
2607 | ||
f5e7840b TR |
2608 | /** |
2609 | * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state | |
2610 | * @plane: plane object | |
2611 | * @state: atomic plane state | |
2612 | * | |
2613 | * Copies atomic state from a plane's current state. This is useful for | |
2614 | * drivers that subclass the plane state. | |
2615 | */ | |
2616 | void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane, | |
2617 | struct drm_plane_state *state) | |
2618 | { | |
2619 | memcpy(state, plane->state, sizeof(*state)); | |
2620 | ||
2621 | if (state->fb) | |
2622 | drm_framebuffer_reference(state->fb); | |
2623 | } | |
2624 | EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state); | |
2625 | ||
d461701c DV |
2626 | /** |
2627 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
2628 | * @plane: drm plane | |
2629 | * | |
2630 | * Default plane state duplicate hook for drivers which don't have their own | |
2631 | * subclassed plane state structure. | |
2632 | */ | |
2633 | struct drm_plane_state * | |
2634 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
2635 | { | |
321ebf04 DV |
2636 | struct drm_plane_state *state; |
2637 | ||
d461701c DV |
2638 | if (WARN_ON(!plane->state)) |
2639 | return NULL; | |
2640 | ||
f5e7840b TR |
2641 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2642 | if (state) | |
2643 | __drm_atomic_helper_plane_duplicate_state(plane, state); | |
321ebf04 DV |
2644 | |
2645 | return state; | |
d461701c DV |
2646 | } |
2647 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
2648 | ||
f5e7840b TR |
2649 | /** |
2650 | * __drm_atomic_helper_plane_destroy_state - release plane state | |
2651 | * @plane: plane object | |
2652 | * @state: plane state object to release | |
2653 | * | |
2654 | * Releases all resources stored in the plane state without actually freeing | |
2655 | * the memory of the plane state. This is useful for drivers that subclass the | |
2656 | * plane state. | |
2657 | */ | |
2658 | void __drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
2659 | struct drm_plane_state *state) | |
2660 | { | |
2661 | if (state->fb) | |
2662 | drm_framebuffer_unreference(state->fb); | |
2663 | } | |
2664 | EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state); | |
2665 | ||
d461701c DV |
2666 | /** |
2667 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
2668 | * @plane: drm plane | |
2669 | * @state: plane state object to release | |
2670 | * | |
2671 | * Default plane state destroy hook for drivers which don't have their own | |
2672 | * subclassed plane state structure. | |
2673 | */ | |
2674 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
321ebf04 | 2675 | struct drm_plane_state *state) |
d461701c | 2676 | { |
f5e7840b | 2677 | __drm_atomic_helper_plane_destroy_state(plane, state); |
d461701c DV |
2678 | kfree(state); |
2679 | } | |
2680 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
2681 | ||
4cd39917 ML |
2682 | /** |
2683 | * __drm_atomic_helper_connector_reset - reset state on connector | |
2684 | * @connector: drm connector | |
2685 | * @conn_state: connector state to assign | |
2686 | * | |
2687 | * Initializes the newly allocated @conn_state and assigns it to | |
2688 | * #connector ->state, usually required when initializing the drivers | |
2689 | * or when called from the ->reset hook. | |
2690 | * | |
2691 | * This is useful for drivers that subclass the connector state. | |
2692 | */ | |
2693 | void | |
2694 | __drm_atomic_helper_connector_reset(struct drm_connector *connector, | |
2695 | struct drm_connector_state *conn_state) | |
2696 | { | |
2697 | if (conn_state) | |
2698 | conn_state->connector = connector; | |
2699 | ||
2700 | connector->state = conn_state; | |
2701 | } | |
2702 | EXPORT_SYMBOL(__drm_atomic_helper_connector_reset); | |
2703 | ||
d461701c DV |
2704 | /** |
2705 | * drm_atomic_helper_connector_reset - default ->reset hook for connectors | |
2706 | * @connector: drm connector | |
2707 | * | |
2708 | * Resets the atomic state for @connector by freeing the state pointer (which | |
2709 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
2710 | * object. | |
2711 | */ | |
2712 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
2713 | { | |
4cd39917 ML |
2714 | struct drm_connector_state *conn_state = |
2715 | kzalloc(sizeof(*conn_state), GFP_KERNEL); | |
07cc0ef6 | 2716 | |
4cd39917 ML |
2717 | kfree(connector->state); |
2718 | __drm_atomic_helper_connector_reset(connector, conn_state); | |
d461701c DV |
2719 | } |
2720 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
2721 | ||
f5e7840b TR |
2722 | /** |
2723 | * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state | |
2724 | * @connector: connector object | |
2725 | * @state: atomic connector state | |
2726 | * | |
2727 | * Copies atomic state from a connector's current state. This is useful for | |
2728 | * drivers that subclass the connector state. | |
2729 | */ | |
2730 | void | |
2731 | __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector, | |
2732 | struct drm_connector_state *state) | |
2733 | { | |
2734 | memcpy(state, connector->state, sizeof(*state)); | |
2735 | } | |
2736 | EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state); | |
2737 | ||
d461701c DV |
2738 | /** |
2739 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
2740 | * @connector: drm connector | |
2741 | * | |
2742 | * Default connector state duplicate hook for drivers which don't have their own | |
2743 | * subclassed connector state structure. | |
2744 | */ | |
2745 | struct drm_connector_state * | |
2746 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
2747 | { | |
f5e7840b TR |
2748 | struct drm_connector_state *state; |
2749 | ||
d461701c DV |
2750 | if (WARN_ON(!connector->state)) |
2751 | return NULL; | |
2752 | ||
f5e7840b TR |
2753 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2754 | if (state) | |
2755 | __drm_atomic_helper_connector_duplicate_state(connector, state); | |
2756 | ||
2757 | return state; | |
d461701c DV |
2758 | } |
2759 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
2760 | ||
397fd77c TR |
2761 | /** |
2762 | * drm_atomic_helper_duplicate_state - duplicate an atomic state object | |
2763 | * @dev: DRM device | |
2764 | * @ctx: lock acquisition context | |
2765 | * | |
2766 | * Makes a copy of the current atomic state by looping over all objects and | |
14942760 TR |
2767 | * duplicating their respective states. This is used for example by suspend/ |
2768 | * resume support code to save the state prior to suspend such that it can | |
2769 | * be restored upon resume. | |
397fd77c TR |
2770 | * |
2771 | * Note that this treats atomic state as persistent between save and restore. | |
2772 | * Drivers must make sure that this is possible and won't result in confusion | |
2773 | * or erroneous behaviour. | |
2774 | * | |
2775 | * Note that if callers haven't already acquired all modeset locks this might | |
2776 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
2777 | * | |
2778 | * Returns: | |
2779 | * A pointer to the copy of the atomic state object on success or an | |
2780 | * ERR_PTR()-encoded error code on failure. | |
14942760 TR |
2781 | * |
2782 | * See also: | |
2783 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
397fd77c TR |
2784 | */ |
2785 | struct drm_atomic_state * | |
2786 | drm_atomic_helper_duplicate_state(struct drm_device *dev, | |
2787 | struct drm_modeset_acquire_ctx *ctx) | |
2788 | { | |
2789 | struct drm_atomic_state *state; | |
2790 | struct drm_connector *conn; | |
2791 | struct drm_plane *plane; | |
2792 | struct drm_crtc *crtc; | |
2793 | int err = 0; | |
2794 | ||
2795 | state = drm_atomic_state_alloc(dev); | |
2796 | if (!state) | |
2797 | return ERR_PTR(-ENOMEM); | |
2798 | ||
2799 | state->acquire_ctx = ctx; | |
2800 | ||
2801 | drm_for_each_crtc(crtc, dev) { | |
2802 | struct drm_crtc_state *crtc_state; | |
2803 | ||
2804 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2805 | if (IS_ERR(crtc_state)) { | |
2806 | err = PTR_ERR(crtc_state); | |
2807 | goto free; | |
2808 | } | |
2809 | } | |
2810 | ||
2811 | drm_for_each_plane(plane, dev) { | |
2812 | struct drm_plane_state *plane_state; | |
2813 | ||
2814 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2815 | if (IS_ERR(plane_state)) { | |
2816 | err = PTR_ERR(plane_state); | |
2817 | goto free; | |
2818 | } | |
2819 | } | |
2820 | ||
2821 | drm_for_each_connector(conn, dev) { | |
2822 | struct drm_connector_state *conn_state; | |
2823 | ||
2824 | conn_state = drm_atomic_get_connector_state(state, conn); | |
2825 | if (IS_ERR(conn_state)) { | |
2826 | err = PTR_ERR(conn_state); | |
2827 | goto free; | |
2828 | } | |
2829 | } | |
2830 | ||
2831 | /* clear the acquire context so that it isn't accidentally reused */ | |
2832 | state->acquire_ctx = NULL; | |
2833 | ||
2834 | free: | |
2835 | if (err < 0) { | |
2836 | drm_atomic_state_free(state); | |
2837 | state = ERR_PTR(err); | |
2838 | } | |
2839 | ||
2840 | return state; | |
2841 | } | |
2842 | EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); | |
2843 | ||
f5e7840b TR |
2844 | /** |
2845 | * __drm_atomic_helper_connector_destroy_state - release connector state | |
2846 | * @connector: connector object | |
2847 | * @state: connector state object to release | |
2848 | * | |
2849 | * Releases all resources stored in the connector state without actually | |
2850 | * freeing the memory of the connector state. This is useful for drivers that | |
2851 | * subclass the connector state. | |
2852 | */ | |
2853 | void | |
2854 | __drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
2855 | struct drm_connector_state *state) | |
2856 | { | |
2857 | /* | |
2858 | * This is currently a placeholder so that drivers that subclass the | |
2859 | * state will automatically do the right thing if code is ever added | |
2860 | * to this function. | |
2861 | */ | |
2862 | } | |
2863 | EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state); | |
2864 | ||
d461701c DV |
2865 | /** |
2866 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
2867 | * @connector: drm connector | |
2868 | * @state: connector state object to release | |
2869 | * | |
2870 | * Default connector state destroy hook for drivers which don't have their own | |
2871 | * subclassed connector state structure. | |
2872 | */ | |
2873 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
2874 | struct drm_connector_state *state) | |
2875 | { | |
f5e7840b | 2876 | __drm_atomic_helper_connector_destroy_state(connector, state); |
d461701c DV |
2877 | kfree(state); |
2878 | } | |
2879 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); |