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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) { | |
2943ef32 AH |
70 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
71 | plane->state->crtc); | |
c2fcd274 DV |
72 | |
73 | if (WARN_ON(!crtc_state)) | |
74 | return; | |
75 | ||
76 | crtc_state->planes_changed = true; | |
77 | } | |
78 | ||
79 | if (plane_state->crtc) { | |
2943ef32 AH |
80 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
81 | plane_state->crtc); | |
c2fcd274 DV |
82 | |
83 | if (WARN_ON(!crtc_state)) | |
84 | return; | |
85 | ||
86 | crtc_state->planes_changed = true; | |
87 | } | |
88 | } | |
89 | ||
8248b65d ML |
90 | static int handle_conflicting_encoders(struct drm_atomic_state *state, |
91 | bool disable_conflicting_encoders) | |
97ac3204 | 92 | { |
97ac3204 | 93 | struct drm_connector_state *conn_state; |
40616a26 ML |
94 | struct drm_connector *connector; |
95 | struct drm_encoder *encoder; | |
96 | unsigned encoder_mask = 0; | |
97 | int i, ret; | |
97ac3204 | 98 | |
8248b65d ML |
99 | /* |
100 | * First loop, find all newly assigned encoders from the connectors | |
101 | * part of the state. If the same encoder is assigned to multiple | |
102 | * connectors bail out. | |
103 | */ | |
97ac3204 | 104 | for_each_connector_in_state(state, connector, conn_state, i) { |
40616a26 ML |
105 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; |
106 | struct drm_encoder *new_encoder; | |
107 | ||
108 | if (!conn_state->crtc) | |
97ac3204 DV |
109 | continue; |
110 | ||
40616a26 ML |
111 | if (funcs->atomic_best_encoder) |
112 | new_encoder = funcs->atomic_best_encoder(connector, conn_state); | |
113 | else | |
114 | new_encoder = funcs->best_encoder(connector); | |
115 | ||
8248b65d ML |
116 | if (new_encoder) { |
117 | if (encoder_mask & (1 << drm_encoder_index(new_encoder))) { | |
118 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n", | |
119 | new_encoder->base.id, new_encoder->name, | |
120 | connector->base.id, connector->name); | |
121 | ||
122 | return -EINVAL; | |
123 | } | |
124 | ||
40616a26 | 125 | encoder_mask |= 1 << drm_encoder_index(new_encoder); |
8248b65d | 126 | } |
97ac3204 DV |
127 | } |
128 | ||
8248b65d ML |
129 | if (!encoder_mask) |
130 | return 0; | |
97ac3204 | 131 | |
8248b65d ML |
132 | /* |
133 | * Second loop, iterate over all connectors not part of the state. | |
134 | * | |
135 | * If a conflicting encoder is found and disable_conflicting_encoders | |
136 | * is not set, an error is returned. Userspace can provide a solution | |
137 | * through the atomic ioctl. | |
138 | * | |
139 | * If the flag is set conflicting connectors are removed from the crtc | |
140 | * and the crtc is disabled if no encoder is left. This preserves | |
141 | * compatibility with the legacy set_config behavior. | |
142 | */ | |
40616a26 ML |
143 | drm_for_each_connector(connector, state->dev) { |
144 | struct drm_crtc_state *crtc_state; | |
623369e5 | 145 | |
40616a26 ML |
146 | if (drm_atomic_get_existing_connector_state(state, connector)) |
147 | continue; | |
623369e5 | 148 | |
40616a26 ML |
149 | encoder = connector->state->best_encoder; |
150 | if (!encoder || !(encoder_mask & (1 << drm_encoder_index(encoder)))) | |
623369e5 DV |
151 | continue; |
152 | ||
8248b65d ML |
153 | if (!disable_conflicting_encoders) { |
154 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n", | |
155 | encoder->base.id, encoder->name, | |
156 | connector->state->crtc->base.id, | |
157 | connector->state->crtc->name, | |
158 | connector->base.id, connector->name); | |
159 | return -EINVAL; | |
160 | } | |
161 | ||
40616a26 ML |
162 | conn_state = drm_atomic_get_connector_state(state, connector); |
163 | if (IS_ERR(conn_state)) | |
164 | return PTR_ERR(conn_state); | |
165 | ||
166 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n", | |
167 | encoder->base.id, encoder->name, | |
168 | conn_state->crtc->base.id, conn_state->crtc->name, | |
169 | connector->base.id, connector->name); | |
170 | ||
171 | crtc_state = drm_atomic_get_existing_crtc_state(state, conn_state->crtc); | |
172 | ||
173 | ret = drm_atomic_set_crtc_for_connector(conn_state, NULL); | |
174 | if (ret) | |
175 | return ret; | |
176 | ||
177 | if (!crtc_state->connector_mask) { | |
178 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, | |
179 | NULL); | |
180 | if (ret < 0) | |
181 | return ret; | |
182 | ||
183 | crtc_state->active = false; | |
184 | } | |
623369e5 DV |
185 | } |
186 | ||
40616a26 | 187 | return 0; |
623369e5 DV |
188 | } |
189 | ||
e87a52b3 ML |
190 | static void |
191 | set_best_encoder(struct drm_atomic_state *state, | |
192 | struct drm_connector_state *conn_state, | |
193 | struct drm_encoder *encoder) | |
194 | { | |
195 | struct drm_crtc_state *crtc_state; | |
196 | struct drm_crtc *crtc; | |
197 | ||
198 | if (conn_state->best_encoder) { | |
199 | /* Unset the encoder_mask in the old crtc state. */ | |
200 | crtc = conn_state->connector->state->crtc; | |
201 | ||
202 | /* A NULL crtc is an error here because we should have | |
203 | * duplicated a NULL best_encoder when crtc was NULL. | |
204 | * As an exception restoring duplicated atomic state | |
205 | * during resume is allowed, so don't warn when | |
206 | * best_encoder is equal to encoder we intend to set. | |
207 | */ | |
208 | WARN_ON(!crtc && encoder != conn_state->best_encoder); | |
209 | if (crtc) { | |
210 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); | |
211 | ||
212 | crtc_state->encoder_mask &= | |
213 | ~(1 << drm_encoder_index(conn_state->best_encoder)); | |
214 | } | |
215 | } | |
216 | ||
217 | if (encoder) { | |
218 | crtc = conn_state->crtc; | |
219 | WARN_ON(!crtc); | |
220 | if (crtc) { | |
221 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); | |
222 | ||
223 | crtc_state->encoder_mask |= | |
224 | 1 << drm_encoder_index(encoder); | |
225 | } | |
226 | } | |
227 | ||
228 | conn_state->best_encoder = encoder; | |
229 | } | |
230 | ||
ec5aaa58 | 231 | static void |
623369e5 | 232 | steal_encoder(struct drm_atomic_state *state, |
ff19b786 | 233 | struct drm_encoder *encoder) |
623369e5 | 234 | { |
623369e5 DV |
235 | struct drm_crtc_state *crtc_state; |
236 | struct drm_connector *connector; | |
237 | struct drm_connector_state *connector_state; | |
ec5aaa58 | 238 | int i; |
623369e5 | 239 | |
ec5aaa58 | 240 | for_each_connector_in_state(state, connector, connector_state, i) { |
ff19b786 | 241 | struct drm_crtc *encoder_crtc; |
623369e5 | 242 | |
e87a52b3 | 243 | if (connector_state->best_encoder != encoder) |
623369e5 DV |
244 | continue; |
245 | ||
ff19b786 | 246 | encoder_crtc = connector->state->crtc; |
623369e5 | 247 | |
ff19b786 ML |
248 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n", |
249 | encoder->base.id, encoder->name, | |
250 | encoder_crtc->base.id, encoder_crtc->name); | |
e87a52b3 ML |
251 | |
252 | set_best_encoder(state, connector_state, NULL); | |
623369e5 | 253 | |
ff19b786 ML |
254 | crtc_state = drm_atomic_get_existing_crtc_state(state, encoder_crtc); |
255 | crtc_state->connectors_changed = true; | |
256 | ||
ec5aaa58 | 257 | return; |
623369e5 | 258 | } |
623369e5 DV |
259 | } |
260 | ||
261 | static int | |
9459545b ML |
262 | update_connector_routing(struct drm_atomic_state *state, |
263 | struct drm_connector *connector, | |
264 | struct drm_connector_state *connector_state) | |
623369e5 | 265 | { |
b5ceff20 | 266 | const struct drm_connector_helper_funcs *funcs; |
623369e5 | 267 | struct drm_encoder *new_encoder; |
623369e5 | 268 | struct drm_crtc_state *crtc_state; |
623369e5 | 269 | |
17a38d9c DV |
270 | DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n", |
271 | connector->base.id, | |
272 | connector->name); | |
623369e5 DV |
273 | |
274 | if (connector->state->crtc != connector_state->crtc) { | |
275 | if (connector->state->crtc) { | |
9b8d1e53 | 276 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector->state->crtc); |
fc596660 | 277 | crtc_state->connectors_changed = true; |
623369e5 DV |
278 | } |
279 | ||
280 | if (connector_state->crtc) { | |
9b8d1e53 | 281 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc); |
fc596660 | 282 | crtc_state->connectors_changed = true; |
623369e5 DV |
283 | } |
284 | } | |
285 | ||
286 | if (!connector_state->crtc) { | |
17a38d9c | 287 | DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n", |
623369e5 DV |
288 | connector->base.id, |
289 | connector->name); | |
290 | ||
e87a52b3 | 291 | set_best_encoder(state, connector_state, NULL); |
623369e5 DV |
292 | |
293 | return 0; | |
294 | } | |
295 | ||
296 | funcs = connector->helper_private; | |
3b8a684b DV |
297 | |
298 | if (funcs->atomic_best_encoder) | |
299 | new_encoder = funcs->atomic_best_encoder(connector, | |
300 | connector_state); | |
301 | else | |
302 | new_encoder = funcs->best_encoder(connector); | |
623369e5 DV |
303 | |
304 | if (!new_encoder) { | |
17a38d9c DV |
305 | DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", |
306 | connector->base.id, | |
307 | connector->name); | |
623369e5 DV |
308 | return -EINVAL; |
309 | } | |
310 | ||
5481c8fb DV |
311 | if (!drm_encoder_crtc_ok(new_encoder, connector_state->crtc)) { |
312 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d]\n", | |
313 | new_encoder->base.id, | |
314 | new_encoder->name, | |
315 | connector_state->crtc->base.id); | |
316 | return -EINVAL; | |
317 | } | |
318 | ||
623369e5 | 319 | if (new_encoder == connector_state->best_encoder) { |
e87a52b3 ML |
320 | set_best_encoder(state, connector_state, new_encoder); |
321 | ||
fa3ab4c2 | 322 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n", |
17a38d9c DV |
323 | connector->base.id, |
324 | connector->name, | |
325 | new_encoder->base.id, | |
326 | new_encoder->name, | |
fa3ab4c2 VS |
327 | connector_state->crtc->base.id, |
328 | connector_state->crtc->name); | |
623369e5 DV |
329 | |
330 | return 0; | |
331 | } | |
332 | ||
ec5aaa58 | 333 | steal_encoder(state, new_encoder); |
6ea76f3c | 334 | |
e87a52b3 ML |
335 | set_best_encoder(state, connector_state, new_encoder); |
336 | ||
9b8d1e53 | 337 | crtc_state = drm_atomic_get_existing_crtc_state(state, connector_state->crtc); |
fc596660 | 338 | crtc_state->connectors_changed = true; |
623369e5 | 339 | |
fa3ab4c2 | 340 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n", |
17a38d9c DV |
341 | connector->base.id, |
342 | connector->name, | |
343 | new_encoder->base.id, | |
344 | new_encoder->name, | |
fa3ab4c2 VS |
345 | connector_state->crtc->base.id, |
346 | connector_state->crtc->name); | |
623369e5 DV |
347 | |
348 | return 0; | |
349 | } | |
350 | ||
351 | static int | |
352 | mode_fixup(struct drm_atomic_state *state) | |
353 | { | |
df63b999 | 354 | struct drm_crtc *crtc; |
623369e5 | 355 | struct drm_crtc_state *crtc_state; |
df63b999 | 356 | struct drm_connector *connector; |
623369e5 DV |
357 | struct drm_connector_state *conn_state; |
358 | int i; | |
359 | bool ret; | |
360 | ||
df63b999 | 361 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
fc596660 ML |
362 | if (!crtc_state->mode_changed && |
363 | !crtc_state->connectors_changed) | |
623369e5 DV |
364 | continue; |
365 | ||
366 | drm_mode_copy(&crtc_state->adjusted_mode, &crtc_state->mode); | |
367 | } | |
368 | ||
df63b999 | 369 | for_each_connector_in_state(state, connector, conn_state, i) { |
b5ceff20 | 370 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
371 | struct drm_encoder *encoder; |
372 | ||
623369e5 DV |
373 | WARN_ON(!!conn_state->best_encoder != !!conn_state->crtc); |
374 | ||
375 | if (!conn_state->crtc || !conn_state->best_encoder) | |
376 | continue; | |
377 | ||
2943ef32 AH |
378 | crtc_state = drm_atomic_get_existing_crtc_state(state, |
379 | conn_state->crtc); | |
623369e5 DV |
380 | |
381 | /* | |
382 | * Each encoder has at most one connector (since we always steal | |
383 | * it away), so we won't call ->mode_fixup twice. | |
384 | */ | |
385 | encoder = conn_state->best_encoder; | |
386 | funcs = encoder->helper_private; | |
387 | ||
862e686c AT |
388 | ret = drm_bridge_mode_fixup(encoder->bridge, &crtc_state->mode, |
389 | &crtc_state->adjusted_mode); | |
390 | if (!ret) { | |
391 | DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); | |
392 | return -EINVAL; | |
623369e5 DV |
393 | } |
394 | ||
2827635e | 395 | if (funcs && funcs->atomic_check) { |
4cd4df80 TR |
396 | ret = funcs->atomic_check(encoder, crtc_state, |
397 | conn_state); | |
398 | if (ret) { | |
17a38d9c DV |
399 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", |
400 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
401 | return ret; |
402 | } | |
2827635e | 403 | } else if (funcs && funcs->mode_fixup) { |
4cd4df80 TR |
404 | ret = funcs->mode_fixup(encoder, &crtc_state->mode, |
405 | &crtc_state->adjusted_mode); | |
406 | if (!ret) { | |
17a38d9c DV |
407 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", |
408 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
409 | return -EINVAL; |
410 | } | |
623369e5 DV |
411 | } |
412 | } | |
413 | ||
df63b999 | 414 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 415 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 416 | |
fc596660 ML |
417 | if (!crtc_state->mode_changed && |
418 | !crtc_state->connectors_changed) | |
623369e5 DV |
419 | continue; |
420 | ||
421 | funcs = crtc->helper_private; | |
840bfe95 ACO |
422 | if (!funcs->mode_fixup) |
423 | continue; | |
424 | ||
623369e5 DV |
425 | ret = funcs->mode_fixup(crtc, &crtc_state->mode, |
426 | &crtc_state->adjusted_mode); | |
427 | if (!ret) { | |
fa3ab4c2 VS |
428 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n", |
429 | crtc->base.id, crtc->name); | |
623369e5 DV |
430 | return -EINVAL; |
431 | } | |
432 | } | |
433 | ||
434 | return 0; | |
435 | } | |
436 | ||
d9b13620 | 437 | /** |
f98bd3ef | 438 | * drm_atomic_helper_check_modeset - validate state object for modeset changes |
d9b13620 DV |
439 | * @dev: DRM device |
440 | * @state: the driver state object | |
441 | * | |
442 | * Check the state object to see if the requested state is physically possible. | |
443 | * This does all the crtc and connector related computations for an atomic | |
fc596660 ML |
444 | * update and adds any additional connectors needed for full modesets and calls |
445 | * down into ->mode_fixup functions of the driver backend. | |
446 | * | |
447 | * crtc_state->mode_changed is set when the input mode is changed. | |
448 | * crtc_state->connectors_changed is set when a connector is added or | |
449 | * removed from the crtc. | |
450 | * crtc_state->active_changed is set when crtc_state->active changes, | |
451 | * which is used for dpms. | |
d9b13620 DV |
452 | * |
453 | * IMPORTANT: | |
454 | * | |
455 | * Drivers which update ->mode_changed (e.g. in their ->atomic_check hooks if a | |
456 | * plane update can't be done without a full modeset) _must_ call this function | |
457 | * afterwards after that change. It is permitted to call this function multiple | |
458 | * times for the same update, e.g. when the ->atomic_check functions depend upon | |
459 | * the adjusted dotclock for fifo space allocation and watermark computation. | |
460 | * | |
461 | * RETURNS | |
462 | * Zero for success or -errno | |
463 | */ | |
464 | int | |
934ce1c2 | 465 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
466 | struct drm_atomic_state *state) |
467 | { | |
623369e5 DV |
468 | struct drm_crtc *crtc; |
469 | struct drm_crtc_state *crtc_state; | |
df63b999 ACO |
470 | struct drm_connector *connector; |
471 | struct drm_connector_state *connector_state; | |
623369e5 DV |
472 | int i, ret; |
473 | ||
df63b999 | 474 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
623369e5 | 475 | if (!drm_mode_equal(&crtc->state->mode, &crtc_state->mode)) { |
fa3ab4c2 VS |
476 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n", |
477 | crtc->base.id, crtc->name); | |
623369e5 DV |
478 | crtc_state->mode_changed = true; |
479 | } | |
480 | ||
481 | if (crtc->state->enable != crtc_state->enable) { | |
fa3ab4c2 VS |
482 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n", |
483 | crtc->base.id, crtc->name); | |
fc596660 ML |
484 | |
485 | /* | |
486 | * For clarity this assignment is done here, but | |
487 | * enable == 0 is only true when there are no | |
488 | * connectors and a NULL mode. | |
489 | * | |
490 | * The other way around is true as well. enable != 0 | |
491 | * iff connectors are attached and a mode is set. | |
492 | */ | |
623369e5 | 493 | crtc_state->mode_changed = true; |
fc596660 | 494 | crtc_state->connectors_changed = true; |
623369e5 DV |
495 | } |
496 | } | |
497 | ||
8248b65d ML |
498 | ret = handle_conflicting_encoders(state, state->legacy_set_config); |
499 | if (ret) | |
500 | return ret; | |
40616a26 | 501 | |
df63b999 | 502 | for_each_connector_in_state(state, connector, connector_state, i) { |
623369e5 DV |
503 | /* |
504 | * This only sets crtc->mode_changed for routing changes, | |
505 | * drivers must set crtc->mode_changed themselves when connector | |
506 | * properties need to be updated. | |
507 | */ | |
9459545b ML |
508 | ret = update_connector_routing(state, connector, |
509 | connector_state); | |
623369e5 DV |
510 | if (ret) |
511 | return ret; | |
512 | } | |
513 | ||
514 | /* | |
515 | * After all the routing has been prepared we need to add in any | |
516 | * connector which is itself unchanged, but who's crtc changes it's | |
517 | * configuration. This must be done before calling mode_fixup in case a | |
518 | * crtc only changed its mode but has the same set of connectors. | |
519 | */ | |
df63b999 | 520 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
14de6c44 ML |
521 | bool has_connectors = |
522 | !!crtc_state->connector_mask; | |
623369e5 | 523 | |
eab3bbef DV |
524 | /* |
525 | * We must set ->active_changed after walking connectors for | |
526 | * otherwise an update that only changes active would result in | |
527 | * a full modeset because update_connector_routing force that. | |
528 | */ | |
529 | if (crtc->state->active != crtc_state->active) { | |
fa3ab4c2 VS |
530 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", |
531 | crtc->base.id, crtc->name); | |
eab3bbef DV |
532 | crtc_state->active_changed = true; |
533 | } | |
534 | ||
2465ff62 | 535 | if (!drm_atomic_crtc_needs_modeset(crtc_state)) |
623369e5 DV |
536 | continue; |
537 | ||
fa3ab4c2 VS |
538 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n", |
539 | crtc->base.id, crtc->name, | |
17a38d9c | 540 | crtc_state->enable ? 'y' : 'n', |
fa3ab4c2 | 541 | crtc_state->active ? 'y' : 'n'); |
623369e5 DV |
542 | |
543 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
544 | if (ret != 0) | |
545 | return ret; | |
546 | ||
57744aa7 ML |
547 | ret = drm_atomic_add_affected_planes(state, crtc); |
548 | if (ret != 0) | |
549 | return ret; | |
550 | ||
14de6c44 | 551 | if (crtc_state->enable != has_connectors) { |
fa3ab4c2 VS |
552 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", |
553 | crtc->base.id, crtc->name); | |
623369e5 DV |
554 | |
555 | return -EINVAL; | |
556 | } | |
557 | } | |
558 | ||
559 | return mode_fixup(state); | |
560 | } | |
d9b13620 | 561 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 562 | |
c2fcd274 | 563 | /** |
f98bd3ef | 564 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
565 | * @dev: DRM device |
566 | * @state: the driver state object | |
567 | * | |
568 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 DV |
569 | * This does all the plane update related checks using by calling into the |
570 | * ->atomic_check hooks provided by the driver. | |
c2fcd274 | 571 | * |
fc596660 ML |
572 | * It also sets crtc_state->planes_changed to indicate that a crtc has |
573 | * updated planes. | |
574 | * | |
c2fcd274 DV |
575 | * RETURNS |
576 | * Zero for success or -errno | |
577 | */ | |
d9b13620 DV |
578 | int |
579 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
580 | struct drm_atomic_state *state) | |
c2fcd274 | 581 | { |
df63b999 ACO |
582 | struct drm_crtc *crtc; |
583 | struct drm_crtc_state *crtc_state; | |
584 | struct drm_plane *plane; | |
585 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
586 | int i, ret = 0; |
587 | ||
df63b999 | 588 | for_each_plane_in_state(state, plane, plane_state, i) { |
b5ceff20 | 589 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
590 | |
591 | funcs = plane->helper_private; | |
592 | ||
593 | drm_atomic_helper_plane_changed(state, plane_state, plane); | |
594 | ||
595 | if (!funcs || !funcs->atomic_check) | |
596 | continue; | |
597 | ||
598 | ret = funcs->atomic_check(plane, plane_state); | |
599 | if (ret) { | |
9f4c97a2 VS |
600 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n", |
601 | plane->base.id, plane->name); | |
c2fcd274 DV |
602 | return ret; |
603 | } | |
604 | } | |
605 | ||
df63b999 | 606 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
b5ceff20 | 607 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
608 | |
609 | funcs = crtc->helper_private; | |
610 | ||
611 | if (!funcs || !funcs->atomic_check) | |
612 | continue; | |
613 | ||
614 | ret = funcs->atomic_check(crtc, state->crtc_states[i]); | |
615 | if (ret) { | |
fa3ab4c2 VS |
616 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n", |
617 | crtc->base.id, crtc->name); | |
c2fcd274 DV |
618 | return ret; |
619 | } | |
620 | } | |
621 | ||
d9b13620 DV |
622 | return ret; |
623 | } | |
624 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
625 | ||
626 | /** | |
627 | * drm_atomic_helper_check - validate state object | |
628 | * @dev: DRM device | |
629 | * @state: the driver state object | |
630 | * | |
631 | * Check the state object to see if the requested state is physically possible. | |
632 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
633 | * checking that a driver needs it can simply wrap that around this function. | |
634 | * Drivers without such needs can directly use this as their ->atomic_check() | |
635 | * callback. | |
636 | * | |
b4274fbe DV |
637 | * This just wraps the two parts of the state checking for planes and modeset |
638 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
639 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
640 | * ->atomic_check functions depend upon an updated adjusted_mode.clock to | |
641 | * e.g. properly compute watermarks. | |
642 | * | |
d9b13620 DV |
643 | * RETURNS |
644 | * Zero for success or -errno | |
645 | */ | |
646 | int drm_atomic_helper_check(struct drm_device *dev, | |
647 | struct drm_atomic_state *state) | |
648 | { | |
649 | int ret; | |
650 | ||
b4274fbe | 651 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
652 | if (ret) |
653 | return ret; | |
654 | ||
b4274fbe | 655 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
656 | if (ret) |
657 | return ret; | |
658 | ||
c2fcd274 DV |
659 | return ret; |
660 | } | |
661 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
662 | ||
623369e5 DV |
663 | static void |
664 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
665 | { | |
df63b999 ACO |
666 | struct drm_connector *connector; |
667 | struct drm_connector_state *old_conn_state; | |
668 | struct drm_crtc *crtc; | |
669 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
670 | int i; |
671 | ||
df63b999 | 672 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 673 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
674 | struct drm_encoder *encoder; |
675 | ||
623369e5 DV |
676 | /* Shut down everything that's in the changeset and currently |
677 | * still on. So need to check the old, saved state. */ | |
df63b999 | 678 | if (!old_conn_state->crtc) |
623369e5 DV |
679 | continue; |
680 | ||
2943ef32 AH |
681 | old_crtc_state = drm_atomic_get_existing_crtc_state(old_state, |
682 | old_conn_state->crtc); | |
eab3bbef | 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. */ | |
2827635e NT |
708 | if (funcs) { |
709 | if (connector->state->crtc && funcs->prepare) | |
710 | funcs->prepare(encoder); | |
711 | else if (funcs->disable) | |
712 | funcs->disable(encoder); | |
713 | else if (funcs->dpms) | |
714 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
715 | } | |
623369e5 | 716 | |
862e686c | 717 | drm_bridge_post_disable(encoder->bridge); |
623369e5 DV |
718 | } |
719 | ||
df63b999 | 720 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 721 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
722 | |
723 | /* Shut down everything that needs a full modeset. */ | |
2465ff62 | 724 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
725 | continue; |
726 | ||
727 | if (!old_crtc_state->active) | |
623369e5 DV |
728 | continue; |
729 | ||
730 | funcs = crtc->helper_private; | |
731 | ||
fa3ab4c2 VS |
732 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n", |
733 | crtc->base.id, crtc->name); | |
95d6eb3b DV |
734 | |
735 | ||
623369e5 | 736 | /* Right function depends upon target state. */ |
ee0a89cf | 737 | if (crtc->state->enable && funcs->prepare) |
623369e5 DV |
738 | funcs->prepare(crtc); |
739 | else if (funcs->disable) | |
740 | funcs->disable(crtc); | |
741 | else | |
742 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
743 | } | |
744 | } | |
745 | ||
4c18d301 DV |
746 | /** |
747 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state | |
748 | * @dev: DRM device | |
749 | * @old_state: atomic state object with old state structures | |
750 | * | |
751 | * This function updates all the various legacy modeset state pointers in | |
752 | * connectors, encoders and crtcs. It also updates the timestamping constants | |
753 | * used for precise vblank timestamps by calling | |
754 | * drm_calc_timestamping_constants(). | |
755 | * | |
756 | * Drivers can use this for building their own atomic commit if they don't have | |
757 | * a pure helper-based modeset implementation. | |
758 | */ | |
759 | void | |
760 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, | |
761 | struct drm_atomic_state *old_state) | |
623369e5 | 762 | { |
df63b999 ACO |
763 | struct drm_connector *connector; |
764 | struct drm_connector_state *old_conn_state; | |
765 | struct drm_crtc *crtc; | |
766 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
767 | int i; |
768 | ||
8c10342c | 769 | /* clear out existing links and update dpms */ |
df63b999 | 770 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
8c10342c ML |
771 | if (connector->encoder) { |
772 | WARN_ON(!connector->encoder->crtc); | |
773 | ||
774 | connector->encoder->crtc = NULL; | |
775 | connector->encoder = NULL; | |
776 | } | |
623369e5 | 777 | |
8c10342c ML |
778 | crtc = connector->state->crtc; |
779 | if ((!crtc && old_conn_state->crtc) || | |
780 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { | |
781 | struct drm_property *dpms_prop = | |
782 | dev->mode_config.dpms_property; | |
783 | int mode = DRM_MODE_DPMS_OFF; | |
623369e5 | 784 | |
8c10342c ML |
785 | if (crtc && crtc->state->active) |
786 | mode = DRM_MODE_DPMS_ON; | |
787 | ||
788 | connector->dpms = mode; | |
789 | drm_object_property_set_value(&connector->base, | |
790 | dpms_prop, mode); | |
791 | } | |
623369e5 DV |
792 | } |
793 | ||
794 | /* set new links */ | |
df63b999 ACO |
795 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
796 | if (!connector->state->crtc) | |
623369e5 DV |
797 | continue; |
798 | ||
799 | if (WARN_ON(!connector->state->best_encoder)) | |
800 | continue; | |
801 | ||
802 | connector->encoder = connector->state->best_encoder; | |
803 | connector->encoder->crtc = connector->state->crtc; | |
804 | } | |
805 | ||
806 | /* set legacy state in the crtc structure */ | |
df63b999 | 807 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
2660801f ML |
808 | struct drm_plane *primary = crtc->primary; |
809 | ||
623369e5 DV |
810 | crtc->mode = crtc->state->mode; |
811 | crtc->enabled = crtc->state->enable; | |
2660801f ML |
812 | |
813 | if (drm_atomic_get_existing_plane_state(old_state, primary) && | |
814 | primary->state->crtc == crtc) { | |
815 | crtc->x = primary->state->src_x >> 16; | |
816 | crtc->y = primary->state->src_y >> 16; | |
817 | } | |
3d51d2d2 DV |
818 | |
819 | if (crtc->state->enable) | |
820 | drm_calc_timestamping_constants(crtc, | |
821 | &crtc->state->adjusted_mode); | |
623369e5 DV |
822 | } |
823 | } | |
4c18d301 | 824 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); |
623369e5 DV |
825 | |
826 | static void | |
827 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
828 | { | |
df63b999 ACO |
829 | struct drm_crtc *crtc; |
830 | struct drm_crtc_state *old_crtc_state; | |
831 | struct drm_connector *connector; | |
832 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
833 | int i; |
834 | ||
df63b999 | 835 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 836 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 837 | |
df63b999 | 838 | if (!crtc->state->mode_changed) |
623369e5 DV |
839 | continue; |
840 | ||
841 | funcs = crtc->helper_private; | |
842 | ||
c982bd90 | 843 | if (crtc->state->enable && funcs->mode_set_nofb) { |
fa3ab4c2 VS |
844 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n", |
845 | crtc->base.id, crtc->name); | |
95d6eb3b | 846 | |
623369e5 | 847 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 848 | } |
623369e5 DV |
849 | } |
850 | ||
df63b999 | 851 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 852 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 853 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
854 | struct drm_encoder *encoder; |
855 | struct drm_display_mode *mode, *adjusted_mode; | |
856 | ||
df63b999 | 857 | if (!connector->state->best_encoder) |
623369e5 DV |
858 | continue; |
859 | ||
860 | encoder = connector->state->best_encoder; | |
861 | funcs = encoder->helper_private; | |
862 | new_crtc_state = connector->state->crtc->state; | |
863 | mode = &new_crtc_state->mode; | |
864 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
865 | ||
eab3bbef DV |
866 | if (!new_crtc_state->mode_changed) |
867 | continue; | |
868 | ||
17a38d9c DV |
869 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
870 | encoder->base.id, encoder->name); | |
95d6eb3b | 871 | |
623369e5 DV |
872 | /* |
873 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 874 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 875 | */ |
2827635e | 876 | if (funcs && funcs->mode_set) |
c982bd90 | 877 | funcs->mode_set(encoder, mode, adjusted_mode); |
623369e5 | 878 | |
862e686c | 879 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
623369e5 DV |
880 | } |
881 | } | |
882 | ||
883 | /** | |
1af434a9 | 884 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 885 | * @dev: DRM device |
a072f809 | 886 | * @old_state: atomic state object with old state structures |
623369e5 | 887 | * |
1af434a9 | 888 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 889 | * prepares them (if required) with the new mode. |
1af434a9 | 890 | * |
60acc4eb | 891 | * For compatibility with legacy crtc helpers this should be called before |
1af434a9 DV |
892 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
893 | * does. But drivers with different needs can group the modeset commits together | |
894 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
895 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 896 | */ |
1af434a9 DV |
897 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
898 | struct drm_atomic_state *old_state) | |
623369e5 | 899 | { |
a072f809 | 900 | disable_outputs(dev, old_state); |
4c18d301 DV |
901 | |
902 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); | |
903 | ||
a072f809 | 904 | crtc_set_mode(dev, old_state); |
623369e5 | 905 | } |
1af434a9 | 906 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 DV |
907 | |
908 | /** | |
1af434a9 | 909 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
910 | * @dev: DRM device |
911 | * @old_state: atomic state object with old state structures | |
912 | * | |
1af434a9 DV |
913 | * This function enables all the outputs with the new configuration which had to |
914 | * be turned off for the update. | |
915 | * | |
60acc4eb | 916 | * For compatibility with legacy crtc helpers this should be called after |
1af434a9 DV |
917 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
918 | * does. But drivers with different needs can group the modeset commits together | |
919 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
920 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 921 | */ |
1af434a9 DV |
922 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
923 | struct drm_atomic_state *old_state) | |
623369e5 | 924 | { |
df63b999 ACO |
925 | struct drm_crtc *crtc; |
926 | struct drm_crtc_state *old_crtc_state; | |
927 | struct drm_connector *connector; | |
928 | struct drm_connector_state *old_conn_state; | |
623369e5 DV |
929 | int i; |
930 | ||
df63b999 | 931 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 932 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
933 | |
934 | /* Need to filter out CRTCs where only planes change. */ | |
2465ff62 | 935 | if (!drm_atomic_crtc_needs_modeset(crtc->state)) |
eab3bbef DV |
936 | continue; |
937 | ||
938 | if (!crtc->state->active) | |
623369e5 DV |
939 | continue; |
940 | ||
941 | funcs = crtc->helper_private; | |
942 | ||
ee0a89cf | 943 | if (crtc->state->enable) { |
fa3ab4c2 VS |
944 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n", |
945 | crtc->base.id, crtc->name); | |
95d6eb3b | 946 | |
ee0a89cf DV |
947 | if (funcs->enable) |
948 | funcs->enable(crtc); | |
949 | else | |
950 | funcs->commit(crtc); | |
951 | } | |
623369e5 DV |
952 | } |
953 | ||
df63b999 | 954 | for_each_connector_in_state(old_state, connector, old_conn_state, i) { |
b5ceff20 | 955 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
956 | struct drm_encoder *encoder; |
957 | ||
df63b999 | 958 | if (!connector->state->best_encoder) |
623369e5 DV |
959 | continue; |
960 | ||
4218a32f | 961 | if (!connector->state->crtc->state->active || |
2465ff62 | 962 | !drm_atomic_crtc_needs_modeset(connector->state->crtc->state)) |
eab3bbef DV |
963 | continue; |
964 | ||
623369e5 DV |
965 | encoder = connector->state->best_encoder; |
966 | funcs = encoder->helper_private; | |
967 | ||
17a38d9c DV |
968 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
969 | encoder->base.id, encoder->name); | |
95d6eb3b | 970 | |
623369e5 DV |
971 | /* |
972 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 973 | * it away), so we won't call enable hooks twice. |
623369e5 | 974 | */ |
862e686c | 975 | drm_bridge_pre_enable(encoder->bridge); |
623369e5 | 976 | |
2827635e NT |
977 | if (funcs) { |
978 | if (funcs->enable) | |
979 | funcs->enable(encoder); | |
980 | else if (funcs->commit) | |
981 | funcs->commit(encoder); | |
982 | } | |
623369e5 | 983 | |
862e686c | 984 | drm_bridge_enable(encoder->bridge); |
623369e5 DV |
985 | } |
986 | } | |
1af434a9 | 987 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 988 | |
4c5b7f3a RC |
989 | /** |
990 | * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state | |
991 | * @dev: DRM device | |
992 | * @state: atomic state object with old state structures | |
993 | * | |
994 | * For implicit sync, driver should fish the exclusive fence out from the | |
995 | * incoming fb's and stash it in the drm_plane_state. This is called after | |
996 | * drm_atomic_helper_swap_state() so it uses the current plane state (and | |
997 | * just uses the atomic state to find the changed planes) | |
998 | */ | |
999 | void drm_atomic_helper_wait_for_fences(struct drm_device *dev, | |
e2330f07 DV |
1000 | struct drm_atomic_state *state) |
1001 | { | |
df63b999 ACO |
1002 | struct drm_plane *plane; |
1003 | struct drm_plane_state *plane_state; | |
e2330f07 DV |
1004 | int i; |
1005 | ||
df63b999 ACO |
1006 | for_each_plane_in_state(state, plane, plane_state, i) { |
1007 | if (!plane->state->fence) | |
e2330f07 DV |
1008 | continue; |
1009 | ||
1010 | WARN_ON(!plane->state->fb); | |
1011 | ||
1012 | fence_wait(plane->state->fence, false); | |
1013 | fence_put(plane->state->fence); | |
1014 | plane->state->fence = NULL; | |
1015 | } | |
1016 | } | |
4c5b7f3a | 1017 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences); |
e2330f07 | 1018 | |
c240906d JK |
1019 | /** |
1020 | * drm_atomic_helper_framebuffer_changed - check if framebuffer has changed | |
1021 | * @dev: DRM device | |
1022 | * @old_state: atomic state object with old state structures | |
1023 | * @crtc: DRM crtc | |
1024 | * | |
1025 | * Checks whether the framebuffer used for this CRTC changes as a result of | |
1026 | * the atomic update. This is useful for drivers which cannot use | |
1027 | * drm_atomic_helper_wait_for_vblanks() and need to reimplement its | |
1028 | * functionality. | |
1029 | * | |
1030 | * Returns: | |
1031 | * true if the framebuffer changed. | |
1032 | */ | |
1033 | bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev, | |
1034 | struct drm_atomic_state *old_state, | |
1035 | struct drm_crtc *crtc) | |
ab58e338 DV |
1036 | { |
1037 | struct drm_plane *plane; | |
1038 | struct drm_plane_state *old_plane_state; | |
ab58e338 DV |
1039 | int i; |
1040 | ||
df63b999 | 1041 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
ab58e338 DV |
1042 | if (plane->state->crtc != crtc && |
1043 | old_plane_state->crtc != crtc) | |
1044 | continue; | |
1045 | ||
1046 | if (plane->state->fb != old_plane_state->fb) | |
1047 | return true; | |
1048 | } | |
1049 | ||
1050 | return false; | |
1051 | } | |
c240906d | 1052 | EXPORT_SYMBOL(drm_atomic_helper_framebuffer_changed); |
ab58e338 | 1053 | |
5ee3229c RC |
1054 | /** |
1055 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
1056 | * @dev: DRM device | |
1057 | * @old_state: atomic state object with old state structures | |
1058 | * | |
1059 | * Helper to, after atomic commit, wait for vblanks on all effected | |
1060 | * crtcs (ie. before cleaning up old framebuffers using | |
ab58e338 DV |
1061 | * drm_atomic_helper_cleanup_planes()). It will only wait on crtcs where the |
1062 | * framebuffers have actually changed to optimize for the legacy cursor and | |
1063 | * plane update use-case. | |
5ee3229c RC |
1064 | */ |
1065 | void | |
1066 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
1067 | struct drm_atomic_state *old_state) | |
623369e5 DV |
1068 | { |
1069 | struct drm_crtc *crtc; | |
1070 | struct drm_crtc_state *old_crtc_state; | |
623369e5 DV |
1071 | int i, ret; |
1072 | ||
df63b999 | 1073 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
623369e5 DV |
1074 | /* No one cares about the old state, so abuse it for tracking |
1075 | * and store whether we hold a vblank reference (and should do a | |
1076 | * vblank wait) in the ->enable boolean. */ | |
1077 | old_crtc_state->enable = false; | |
1078 | ||
1079 | if (!crtc->state->enable) | |
1080 | continue; | |
1081 | ||
f02ad907 DV |
1082 | /* Legacy cursor ioctls are completely unsynced, and userspace |
1083 | * relies on that (by doing tons of cursor updates). */ | |
1084 | if (old_state->legacy_cursor_update) | |
1085 | continue; | |
1086 | ||
c240906d JK |
1087 | if (!drm_atomic_helper_framebuffer_changed(dev, |
1088 | old_state, crtc)) | |
ab58e338 DV |
1089 | continue; |
1090 | ||
623369e5 DV |
1091 | ret = drm_crtc_vblank_get(crtc); |
1092 | if (ret != 0) | |
1093 | continue; | |
1094 | ||
1095 | old_crtc_state->enable = true; | |
d4853630 | 1096 | old_crtc_state->last_vblank_count = drm_crtc_vblank_count(crtc); |
623369e5 DV |
1097 | } |
1098 | ||
df63b999 ACO |
1099 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
1100 | if (!old_crtc_state->enable) | |
623369e5 DV |
1101 | continue; |
1102 | ||
1103 | ret = wait_event_timeout(dev->vblank[i].queue, | |
1104 | old_crtc_state->last_vblank_count != | |
d4853630 | 1105 | drm_crtc_vblank_count(crtc), |
623369e5 DV |
1106 | msecs_to_jiffies(50)); |
1107 | ||
8d4d0d70 VS |
1108 | WARN(!ret, "[CRTC:%d] vblank wait timed out\n", crtc->base.id); |
1109 | ||
623369e5 DV |
1110 | drm_crtc_vblank_put(crtc); |
1111 | } | |
1112 | } | |
5ee3229c | 1113 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 DV |
1114 | |
1115 | /** | |
1116 | * drm_atomic_helper_commit - commit validated state object | |
1117 | * @dev: DRM device | |
1118 | * @state: the driver state object | |
286dbb8d | 1119 | * @nonblocking: whether nonblocking behavior is requested. |
623369e5 DV |
1120 | * |
1121 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
1122 | * object. This can still fail when e.g. the framebuffer reservation fails. For | |
286dbb8d | 1123 | * now this doesn't implement nonblocking commits. |
623369e5 | 1124 | * |
286dbb8d | 1125 | * Note that right now this function does not support nonblocking commits, hence |
6e48ae32 DV |
1126 | * driver writers must implement their own version for now. Also note that the |
1127 | * default ordering of how the various stages are called is to match the legacy | |
1128 | * modeset helper library closest. One peculiarity of that is that it doesn't | |
1129 | * mesh well with runtime PM at all. | |
1130 | * | |
1131 | * For drivers supporting runtime PM the recommended sequence is | |
1132 | * | |
1133 | * drm_atomic_helper_commit_modeset_disables(dev, state); | |
1134 | * | |
1135 | * drm_atomic_helper_commit_modeset_enables(dev, state); | |
1136 | * | |
1137 | * drm_atomic_helper_commit_planes(dev, state, true); | |
1138 | * | |
1139 | * See the kerneldoc entries for these three functions for more details. | |
1140 | * | |
623369e5 DV |
1141 | * RETURNS |
1142 | * Zero for success or -errno. | |
1143 | */ | |
1144 | int drm_atomic_helper_commit(struct drm_device *dev, | |
1145 | struct drm_atomic_state *state, | |
286dbb8d | 1146 | bool nonblock) |
623369e5 DV |
1147 | { |
1148 | int ret; | |
1149 | ||
286dbb8d | 1150 | if (nonblock) |
623369e5 DV |
1151 | return -EBUSY; |
1152 | ||
1153 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
1154 | if (ret) | |
1155 | return ret; | |
1156 | ||
1157 | /* | |
1158 | * This is the point of no return - everything below never fails except | |
1159 | * when the hw goes bonghits. Which means we can commit the new state on | |
1160 | * the software side now. | |
1161 | */ | |
1162 | ||
1163 | drm_atomic_helper_swap_state(dev, state); | |
1164 | ||
1165 | /* | |
1166 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 1167 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
1168 | * that the asynchronous work has either been cancelled (if the driver |
1169 | * supports it, which at least requires that the framebuffers get | |
1170 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
1171 | * before the new state gets committed on the software side with | |
1172 | * drm_atomic_helper_swap_state(). | |
1173 | * | |
1174 | * This scheme allows new atomic state updates to be prepared and | |
1175 | * checked in parallel to the asynchronous completion of the previous | |
1176 | * update. Which is important since compositors need to figure out the | |
1177 | * composition of the next frame right after having submitted the | |
1178 | * current layout. | |
1179 | */ | |
1180 | ||
4c5b7f3a | 1181 | drm_atomic_helper_wait_for_fences(dev, state); |
e2330f07 | 1182 | |
1af434a9 | 1183 | drm_atomic_helper_commit_modeset_disables(dev, state); |
623369e5 | 1184 | |
aef9dbb8 | 1185 | drm_atomic_helper_commit_planes(dev, state, false); |
623369e5 | 1186 | |
1af434a9 | 1187 | drm_atomic_helper_commit_modeset_enables(dev, state); |
623369e5 | 1188 | |
5ee3229c | 1189 | drm_atomic_helper_wait_for_vblanks(dev, state); |
623369e5 DV |
1190 | |
1191 | drm_atomic_helper_cleanup_planes(dev, state); | |
1192 | ||
1193 | drm_atomic_state_free(state); | |
1194 | ||
1195 | return 0; | |
1196 | } | |
1197 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1198 | ||
e8c833a7 | 1199 | /** |
286dbb8d | 1200 | * DOC: implementing nonblocking commit |
e8c833a7 | 1201 | * |
286dbb8d ML |
1202 | * For now the atomic helpers don't support nonblocking commit directly. If |
1203 | * there is real need it could be added though, using the dma-buf fence | |
1204 | * infrastructure for generic synchronization with outstanding rendering. | |
e8c833a7 | 1205 | * |
286dbb8d ML |
1206 | * For now drivers have to implement nonblocking commit themselves, with the |
1207 | * following sequence being the recommended one: | |
e8c833a7 DV |
1208 | * |
1209 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
1210 | * which commit needs to call which can fail, so we want to run it first and | |
1211 | * synchronously. | |
1212 | * | |
286dbb8d | 1213 | * 2. Synchronize with any outstanding nonblocking commit worker threads which |
e8c833a7 DV |
1214 | * might be affected the new state update. This can be done by either cancelling |
1215 | * or flushing the work items, depending upon whether the driver can deal with | |
1216 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
1217 | * cleanup is still done when cancelling. | |
1218 | * | |
1219 | * For sufficient parallelism it is recommended to have a work item per crtc | |
1220 | * (for updates which don't touch global state) and a global one. Then we only | |
1221 | * need to synchronize with the crtc work items for changed crtcs and the global | |
1222 | * work item, which allows nice concurrent updates on disjoint sets of crtcs. | |
1223 | * | |
1224 | * 3. The software state is updated synchronously with | |
26196f7e | 1225 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
e8c833a7 | 1226 | * locks means concurrent callers never see inconsistent state. And doing this |
286dbb8d ML |
1227 | * while it's guaranteed that no relevant nonblocking worker runs means that |
1228 | * nonblocking workers do not need grab any locks. Actually they must not grab | |
1229 | * locks, for otherwise the work flushing will deadlock. | |
e8c833a7 DV |
1230 | * |
1231 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1232 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1233 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
1234 | * being displayed. | |
1235 | */ | |
1236 | ||
c2fcd274 | 1237 | /** |
2e3afd47 | 1238 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 1239 | * @dev: DRM device |
2e3afd47 | 1240 | * @state: atomic state object with new state structures |
c2fcd274 DV |
1241 | * |
1242 | * This function prepares plane state, specifically framebuffers, for the new | |
1243 | * configuration. If any failure is encountered this function will call | |
1244 | * ->cleanup_fb on any already successfully prepared framebuffer. | |
1245 | * | |
1246 | * Returns: | |
1247 | * 0 on success, negative error code on failure. | |
1248 | */ | |
1249 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
1250 | struct drm_atomic_state *state) | |
1251 | { | |
1252 | int nplanes = dev->mode_config.num_total_plane; | |
1253 | int ret, i; | |
1254 | ||
1255 | for (i = 0; i < nplanes; i++) { | |
b5ceff20 | 1256 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1257 | struct drm_plane *plane = state->planes[i]; |
d136dfee | 1258 | struct drm_plane_state *plane_state = state->plane_states[i]; |
c2fcd274 DV |
1259 | |
1260 | if (!plane) | |
1261 | continue; | |
1262 | ||
1263 | funcs = plane->helper_private; | |
1264 | ||
844f9111 ML |
1265 | if (funcs->prepare_fb) { |
1266 | ret = funcs->prepare_fb(plane, plane_state); | |
c2fcd274 DV |
1267 | if (ret) |
1268 | goto fail; | |
1269 | } | |
1270 | } | |
1271 | ||
1272 | return 0; | |
1273 | ||
1274 | fail: | |
1275 | for (i--; i >= 0; i--) { | |
b5ceff20 | 1276 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1277 | struct drm_plane *plane = state->planes[i]; |
d136dfee | 1278 | struct drm_plane_state *plane_state = state->plane_states[i]; |
c2fcd274 DV |
1279 | |
1280 | if (!plane) | |
1281 | continue; | |
1282 | ||
1283 | funcs = plane->helper_private; | |
1284 | ||
844f9111 ML |
1285 | if (funcs->cleanup_fb) |
1286 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1287 | |
1288 | } | |
1289 | ||
1290 | return ret; | |
1291 | } | |
1292 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
1293 | ||
aef9dbb8 DV |
1294 | bool plane_crtc_active(struct drm_plane_state *state) |
1295 | { | |
1296 | return state->crtc && state->crtc->state->active; | |
1297 | } | |
1298 | ||
c2fcd274 DV |
1299 | /** |
1300 | * drm_atomic_helper_commit_planes - commit plane state | |
1301 | * @dev: DRM device | |
b0fcfc89 | 1302 | * @old_state: atomic state object with old state structures |
aef9dbb8 | 1303 | * @active_only: Only commit on active CRTC if set |
c2fcd274 DV |
1304 | * |
1305 | * This function commits the new plane state using the plane and atomic helper | |
1306 | * functions for planes and crtcs. It assumes that the atomic state has already | |
1307 | * been pushed into the relevant object state pointers, since this step can no | |
1308 | * longer fail. | |
1309 | * | |
b0fcfc89 | 1310 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 | 1311 | * crtcs need to be updated though. |
de28d021 ML |
1312 | * |
1313 | * Note that this function does all plane updates across all CRTCs in one step. | |
1314 | * If the hardware can't support this approach look at | |
1315 | * drm_atomic_helper_commit_planes_on_crtc() instead. | |
6e48ae32 DV |
1316 | * |
1317 | * Plane parameters can be updated by applications while the associated CRTC is | |
1318 | * disabled. The DRM/KMS core will store the parameters in the plane state, | |
1319 | * which will be available to the driver when the CRTC is turned on. As a result | |
1320 | * most drivers don't need to be immediately notified of plane updates for a | |
1321 | * disabled CRTC. | |
1322 | * | |
1323 | * Unless otherwise needed, drivers are advised to set the @active_only | |
1324 | * parameters to true in order not to receive plane update notifications related | |
1325 | * to a disabled CRTC. This avoids the need to manually ignore plane updates in | |
1326 | * driver code when the driver and/or hardware can't or just don't need to deal | |
1327 | * with updates on disabled CRTCs, for example when supporting runtime PM. | |
1328 | * | |
1329 | * The drm_atomic_helper_commit() default implementation only sets @active_only | |
1330 | * to false to most closely match the behaviour of the legacy helpers. This should | |
1331 | * not be copied blindly by drivers. | |
c2fcd274 DV |
1332 | */ |
1333 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
aef9dbb8 DV |
1334 | struct drm_atomic_state *old_state, |
1335 | bool active_only) | |
c2fcd274 | 1336 | { |
df63b999 ACO |
1337 | struct drm_crtc *crtc; |
1338 | struct drm_crtc_state *old_crtc_state; | |
1339 | struct drm_plane *plane; | |
1340 | struct drm_plane_state *old_plane_state; | |
c2fcd274 DV |
1341 | int i; |
1342 | ||
df63b999 | 1343 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1344 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1345 | |
1346 | funcs = crtc->helper_private; | |
1347 | ||
1348 | if (!funcs || !funcs->atomic_begin) | |
1349 | continue; | |
1350 | ||
aef9dbb8 DV |
1351 | if (active_only && !crtc->state->active) |
1352 | continue; | |
1353 | ||
613d2b27 | 1354 | funcs->atomic_begin(crtc, old_crtc_state); |
c2fcd274 DV |
1355 | } |
1356 | ||
df63b999 | 1357 | for_each_plane_in_state(old_state, plane, old_plane_state, i) { |
b5ceff20 | 1358 | const struct drm_plane_helper_funcs *funcs; |
216c59d6 | 1359 | bool disabling; |
c2fcd274 DV |
1360 | |
1361 | funcs = plane->helper_private; | |
1362 | ||
3cad4b68 | 1363 | if (!funcs) |
c2fcd274 DV |
1364 | continue; |
1365 | ||
216c59d6 LP |
1366 | disabling = drm_atomic_plane_disabling(plane, old_plane_state); |
1367 | ||
1368 | if (active_only) { | |
1369 | /* | |
1370 | * Skip planes related to inactive CRTCs. If the plane | |
1371 | * is enabled use the state of the current CRTC. If the | |
1372 | * plane is being disabled use the state of the old | |
1373 | * CRTC to avoid skipping planes being disabled on an | |
1374 | * active CRTC. | |
1375 | */ | |
1376 | if (!disabling && !plane_crtc_active(plane->state)) | |
1377 | continue; | |
1378 | if (disabling && !plane_crtc_active(old_plane_state)) | |
1379 | continue; | |
1380 | } | |
aef9dbb8 | 1381 | |
407b8bd9 TR |
1382 | /* |
1383 | * Special-case disabling the plane if drivers support it. | |
1384 | */ | |
216c59d6 | 1385 | if (disabling && funcs->atomic_disable) |
407b8bd9 | 1386 | funcs->atomic_disable(plane, old_plane_state); |
216c59d6 | 1387 | else if (plane->state->crtc || disabling) |
407b8bd9 | 1388 | funcs->atomic_update(plane, old_plane_state); |
c2fcd274 DV |
1389 | } |
1390 | ||
df63b999 | 1391 | for_each_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b5ceff20 | 1392 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1393 | |
1394 | funcs = crtc->helper_private; | |
1395 | ||
1396 | if (!funcs || !funcs->atomic_flush) | |
1397 | continue; | |
1398 | ||
aef9dbb8 DV |
1399 | if (active_only && !crtc->state->active) |
1400 | continue; | |
1401 | ||
613d2b27 | 1402 | funcs->atomic_flush(crtc, old_crtc_state); |
c2fcd274 DV |
1403 | } |
1404 | } | |
1405 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1406 | ||
de28d021 ML |
1407 | /** |
1408 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc | |
1409 | * @old_crtc_state: atomic state object with the old crtc state | |
1410 | * | |
1411 | * This function commits the new plane state using the plane and atomic helper | |
1412 | * functions for planes on the specific crtc. It assumes that the atomic state | |
1413 | * has already been pushed into the relevant object state pointers, since this | |
1414 | * step can no longer fail. | |
1415 | * | |
1416 | * This function is useful when plane updates should be done crtc-by-crtc | |
1417 | * instead of one global step like drm_atomic_helper_commit_planes() does. | |
1418 | * | |
1419 | * This function can only be savely used when planes are not allowed to move | |
1420 | * between different CRTCs because this function doesn't handle inter-CRTC | |
1421 | * depencies. Callers need to ensure that either no such depencies exist, | |
1422 | * resolve them through ordering of commit calls or through some other means. | |
1423 | */ | |
1424 | void | |
1425 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) | |
1426 | { | |
1427 | const struct drm_crtc_helper_funcs *crtc_funcs; | |
1428 | struct drm_crtc *crtc = old_crtc_state->crtc; | |
1429 | struct drm_atomic_state *old_state = old_crtc_state->state; | |
1430 | struct drm_plane *plane; | |
1431 | unsigned plane_mask; | |
1432 | ||
1433 | plane_mask = old_crtc_state->plane_mask; | |
1434 | plane_mask |= crtc->state->plane_mask; | |
1435 | ||
1436 | crtc_funcs = crtc->helper_private; | |
1437 | if (crtc_funcs && crtc_funcs->atomic_begin) | |
613d2b27 | 1438 | crtc_funcs->atomic_begin(crtc, old_crtc_state); |
de28d021 ML |
1439 | |
1440 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { | |
1441 | struct drm_plane_state *old_plane_state = | |
1442 | drm_atomic_get_existing_plane_state(old_state, plane); | |
1443 | const struct drm_plane_helper_funcs *plane_funcs; | |
1444 | ||
1445 | plane_funcs = plane->helper_private; | |
1446 | ||
1447 | if (!old_plane_state || !plane_funcs) | |
1448 | continue; | |
1449 | ||
1450 | WARN_ON(plane->state->crtc && plane->state->crtc != crtc); | |
1451 | ||
1452 | if (drm_atomic_plane_disabling(plane, old_plane_state) && | |
1453 | plane_funcs->atomic_disable) | |
1454 | plane_funcs->atomic_disable(plane, old_plane_state); | |
1455 | else if (plane->state->crtc || | |
1456 | drm_atomic_plane_disabling(plane, old_plane_state)) | |
1457 | plane_funcs->atomic_update(plane, old_plane_state); | |
1458 | } | |
1459 | ||
1460 | if (crtc_funcs && crtc_funcs->atomic_flush) | |
613d2b27 | 1461 | crtc_funcs->atomic_flush(crtc, old_crtc_state); |
de28d021 ML |
1462 | } |
1463 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); | |
1464 | ||
6753ba97 JS |
1465 | /** |
1466 | * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes | |
1467 | * @crtc: CRTC | |
1468 | * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks | |
1469 | * | |
1470 | * Disables all planes associated with the given CRTC. This can be | |
1471 | * used for instance in the CRTC helper disable callback to disable | |
1472 | * all planes before shutting down the display pipeline. | |
1473 | * | |
1474 | * If the atomic-parameter is set the function calls the CRTC's | |
1475 | * atomic_begin hook before and atomic_flush hook after disabling the | |
1476 | * planes. | |
1477 | * | |
1478 | * It is a bug to call this function without having implemented the | |
1479 | * ->atomic_disable() plane hook. | |
1480 | */ | |
1481 | void drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc *crtc, | |
1482 | bool atomic) | |
1483 | { | |
1484 | const struct drm_crtc_helper_funcs *crtc_funcs = | |
1485 | crtc->helper_private; | |
1486 | struct drm_plane *plane; | |
1487 | ||
1488 | if (atomic && crtc_funcs && crtc_funcs->atomic_begin) | |
1489 | crtc_funcs->atomic_begin(crtc, NULL); | |
1490 | ||
1491 | drm_for_each_plane(plane, crtc->dev) { | |
1492 | const struct drm_plane_helper_funcs *plane_funcs = | |
1493 | plane->helper_private; | |
1494 | ||
1495 | if (plane->state->crtc != crtc || !plane_funcs) | |
1496 | continue; | |
1497 | ||
1498 | WARN_ON(!plane_funcs->atomic_disable); | |
1499 | if (plane_funcs->atomic_disable) | |
1500 | plane_funcs->atomic_disable(plane, NULL); | |
1501 | } | |
1502 | ||
1503 | if (atomic && crtc_funcs && crtc_funcs->atomic_flush) | |
1504 | crtc_funcs->atomic_flush(crtc, NULL); | |
1505 | } | |
1506 | EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); | |
1507 | ||
c2fcd274 DV |
1508 | /** |
1509 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
1510 | * @dev: DRM device | |
1511 | * @old_state: atomic state object with old state structures | |
1512 | * | |
1513 | * This function cleans up plane state, specifically framebuffers, from the old | |
1514 | * configuration. Hence the old configuration must be perserved in @old_state to | |
1515 | * be able to call this function. | |
1516 | * | |
1517 | * This function must also be called on the new state when the atomic update | |
1518 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
1519 | */ | |
1520 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
1521 | struct drm_atomic_state *old_state) | |
1522 | { | |
df63b999 ACO |
1523 | struct drm_plane *plane; |
1524 | struct drm_plane_state *plane_state; | |
c2fcd274 DV |
1525 | int i; |
1526 | ||
df63b999 | 1527 | for_each_plane_in_state(old_state, plane, plane_state, i) { |
b5ceff20 | 1528 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1529 | |
c2fcd274 DV |
1530 | funcs = plane->helper_private; |
1531 | ||
844f9111 ML |
1532 | if (funcs->cleanup_fb) |
1533 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
1534 | } |
1535 | } | |
1536 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
1537 | ||
1538 | /** | |
1539 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
1540 | * @dev: DRM device | |
1541 | * @state: atomic state | |
1542 | * | |
1543 | * This function stores the atomic state into the current state pointers in all | |
1544 | * driver objects. It should be called after all failing steps have been done | |
1545 | * and succeeded, but before the actual hardware state is committed. | |
1546 | * | |
1547 | * For cleanup and error recovery the current state for all changed objects will | |
1548 | * be swaped into @state. | |
1549 | * | |
1550 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
1551 | * | |
1552 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
1553 | * | |
1554 | * 2. Do any other steps that might fail. | |
1555 | * | |
1556 | * 3. Put the staged state into the current state pointers with this function. | |
1557 | * | |
1558 | * 4. Actually commit the hardware state. | |
1559 | * | |
26196f7e | 1560 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
c2fcd274 DV |
1561 | * contains the old state. Also do any other cleanup required with that state. |
1562 | */ | |
1563 | void drm_atomic_helper_swap_state(struct drm_device *dev, | |
1564 | struct drm_atomic_state *state) | |
1565 | { | |
1566 | int i; | |
1567 | ||
5fff80bb | 1568 | for (i = 0; i < state->num_connector; i++) { |
c2fcd274 DV |
1569 | struct drm_connector *connector = state->connectors[i]; |
1570 | ||
1571 | if (!connector) | |
1572 | continue; | |
1573 | ||
1574 | connector->state->state = state; | |
1575 | swap(state->connector_states[i], connector->state); | |
1576 | connector->state->state = NULL; | |
1577 | } | |
1578 | ||
1579 | for (i = 0; i < dev->mode_config.num_crtc; i++) { | |
1580 | struct drm_crtc *crtc = state->crtcs[i]; | |
1581 | ||
1582 | if (!crtc) | |
1583 | continue; | |
1584 | ||
1585 | crtc->state->state = state; | |
1586 | swap(state->crtc_states[i], crtc->state); | |
1587 | crtc->state->state = NULL; | |
1588 | } | |
1589 | ||
1590 | for (i = 0; i < dev->mode_config.num_total_plane; i++) { | |
1591 | struct drm_plane *plane = state->planes[i]; | |
1592 | ||
1593 | if (!plane) | |
1594 | continue; | |
1595 | ||
1596 | plane->state->state = state; | |
1597 | swap(state->plane_states[i], plane->state); | |
1598 | plane->state->state = NULL; | |
1599 | } | |
1600 | } | |
1601 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
1602 | |
1603 | /** | |
1604 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
1605 | * @plane: plane object to update | |
1606 | * @crtc: owning CRTC of owning plane | |
1607 | * @fb: framebuffer to flip onto plane | |
1608 | * @crtc_x: x offset of primary plane on crtc | |
1609 | * @crtc_y: y offset of primary plane on crtc | |
1610 | * @crtc_w: width of primary plane rectangle on crtc | |
1611 | * @crtc_h: height of primary plane rectangle on crtc | |
1612 | * @src_x: x offset of @fb for panning | |
1613 | * @src_y: y offset of @fb for panning | |
1614 | * @src_w: width of source rectangle in @fb | |
1615 | * @src_h: height of source rectangle in @fb | |
1616 | * | |
1617 | * Provides a default plane update handler using the atomic driver interface. | |
1618 | * | |
1619 | * RETURNS: | |
1620 | * Zero on success, error code on failure | |
1621 | */ | |
1622 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
1623 | struct drm_crtc *crtc, | |
1624 | struct drm_framebuffer *fb, | |
1625 | int crtc_x, int crtc_y, | |
1626 | unsigned int crtc_w, unsigned int crtc_h, | |
1627 | uint32_t src_x, uint32_t src_y, | |
1628 | uint32_t src_w, uint32_t src_h) | |
1629 | { | |
1630 | struct drm_atomic_state *state; | |
1631 | struct drm_plane_state *plane_state; | |
1632 | int ret = 0; | |
1633 | ||
1634 | state = drm_atomic_state_alloc(plane->dev); | |
1635 | if (!state) | |
1636 | return -ENOMEM; | |
1637 | ||
1638 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
1639 | retry: | |
1640 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1641 | if (IS_ERR(plane_state)) { | |
1642 | ret = PTR_ERR(plane_state); | |
1643 | goto fail; | |
1644 | } | |
1645 | ||
07cc0ef6 | 1646 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
1647 | if (ret != 0) |
1648 | goto fail; | |
321ebf04 | 1649 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
1650 | plane_state->crtc_x = crtc_x; |
1651 | plane_state->crtc_y = crtc_y; | |
042652ed | 1652 | plane_state->crtc_w = crtc_w; |
02e6f379 | 1653 | plane_state->crtc_h = crtc_h; |
042652ed DV |
1654 | plane_state->src_x = src_x; |
1655 | plane_state->src_y = src_y; | |
042652ed | 1656 | plane_state->src_w = src_w; |
02e6f379 | 1657 | plane_state->src_h = src_h; |
042652ed | 1658 | |
3671c580 DV |
1659 | if (plane == crtc->cursor) |
1660 | state->legacy_cursor_update = true; | |
1661 | ||
042652ed DV |
1662 | ret = drm_atomic_commit(state); |
1663 | if (ret != 0) | |
1664 | goto fail; | |
1665 | ||
1666 | /* Driver takes ownership of state on successful commit. */ | |
1667 | return 0; | |
1668 | fail: | |
1669 | if (ret == -EDEADLK) | |
1670 | goto backoff; | |
1671 | ||
1672 | drm_atomic_state_free(state); | |
1673 | ||
1674 | return ret; | |
1675 | backoff: | |
042652ed | 1676 | drm_atomic_state_clear(state); |
6f75cea6 | 1677 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1678 | |
1679 | /* | |
1680 | * Someone might have exchanged the framebuffer while we dropped locks | |
1681 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1682 | * core does for us. | |
1683 | */ | |
1684 | plane->old_fb = plane->fb; | |
1685 | ||
1686 | goto retry; | |
1687 | } | |
1688 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
1689 | ||
1690 | /** | |
1691 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
1692 | * @plane: plane to disable | |
1693 | * | |
1694 | * Provides a default plane disable handler using the atomic driver interface. | |
1695 | * | |
1696 | * RETURNS: | |
1697 | * Zero on success, error code on failure | |
1698 | */ | |
1699 | int drm_atomic_helper_disable_plane(struct drm_plane *plane) | |
1700 | { | |
1701 | struct drm_atomic_state *state; | |
1702 | struct drm_plane_state *plane_state; | |
1703 | int ret = 0; | |
1704 | ||
aa54e2ee JSP |
1705 | /* |
1706 | * FIXME: Without plane->crtc set we can't get at the implicit legacy | |
1707 | * acquire context. The real fix will be to wire the acquire ctx through | |
1708 | * everywhere we need it, but meanwhile prevent chaos by just skipping | |
1709 | * this noop. The critical case is the cursor ioctls which a) only grab | |
1710 | * crtc/cursor-plane locks (so we need the crtc to get at the right | |
1711 | * acquire context) and b) can try to disable the plane multiple times. | |
1712 | */ | |
1713 | if (!plane->crtc) | |
1714 | return 0; | |
1715 | ||
042652ed DV |
1716 | state = drm_atomic_state_alloc(plane->dev); |
1717 | if (!state) | |
1718 | return -ENOMEM; | |
1719 | ||
1720 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(plane->crtc); | |
1721 | retry: | |
1722 | plane_state = drm_atomic_get_plane_state(state, plane); | |
1723 | if (IS_ERR(plane_state)) { | |
1724 | ret = PTR_ERR(plane_state); | |
1725 | goto fail; | |
1726 | } | |
1727 | ||
24e79d0d ML |
1728 | if (plane_state->crtc && (plane == plane->crtc->cursor)) |
1729 | plane_state->state->legacy_cursor_update = true; | |
1730 | ||
bbb1e524 | 1731 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
042652ed DV |
1732 | if (ret != 0) |
1733 | goto fail; | |
f02ad907 | 1734 | |
042652ed DV |
1735 | ret = drm_atomic_commit(state); |
1736 | if (ret != 0) | |
1737 | goto fail; | |
1738 | ||
1739 | /* Driver takes ownership of state on successful commit. */ | |
1740 | return 0; | |
1741 | fail: | |
1742 | if (ret == -EDEADLK) | |
1743 | goto backoff; | |
1744 | ||
1745 | drm_atomic_state_free(state); | |
1746 | ||
1747 | return ret; | |
1748 | backoff: | |
042652ed | 1749 | drm_atomic_state_clear(state); |
6f75cea6 | 1750 | drm_atomic_legacy_backoff(state); |
042652ed DV |
1751 | |
1752 | /* | |
1753 | * Someone might have exchanged the framebuffer while we dropped locks | |
1754 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1755 | * core does for us. | |
1756 | */ | |
1757 | plane->old_fb = plane->fb; | |
1758 | ||
1759 | goto retry; | |
1760 | } | |
1761 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
1762 | ||
bbb1e524 RC |
1763 | /* just used from fb-helper and atomic-helper: */ |
1764 | int __drm_atomic_helper_disable_plane(struct drm_plane *plane, | |
1765 | struct drm_plane_state *plane_state) | |
1766 | { | |
1767 | int ret; | |
1768 | ||
1769 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
1770 | if (ret != 0) | |
1771 | return ret; | |
1772 | ||
1773 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
1774 | plane_state->crtc_x = 0; | |
1775 | plane_state->crtc_y = 0; | |
bbb1e524 | 1776 | plane_state->crtc_w = 0; |
02e6f379 | 1777 | plane_state->crtc_h = 0; |
bbb1e524 RC |
1778 | plane_state->src_x = 0; |
1779 | plane_state->src_y = 0; | |
bbb1e524 | 1780 | plane_state->src_w = 0; |
02e6f379 | 1781 | plane_state->src_h = 0; |
bbb1e524 | 1782 | |
bbb1e524 RC |
1783 | return 0; |
1784 | } | |
1785 | ||
042652ed DV |
1786 | static int update_output_state(struct drm_atomic_state *state, |
1787 | struct drm_mode_set *set) | |
1788 | { | |
1789 | struct drm_device *dev = set->crtc->dev; | |
df63b999 ACO |
1790 | struct drm_crtc *crtc; |
1791 | struct drm_crtc_state *crtc_state; | |
1792 | struct drm_connector *connector; | |
042652ed | 1793 | struct drm_connector_state *conn_state; |
6ab520a2 | 1794 | int ret, i; |
042652ed DV |
1795 | |
1796 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
1797 | state->acquire_ctx); | |
1798 | if (ret) | |
1799 | return ret; | |
1800 | ||
6ab520a2 ML |
1801 | /* First disable all connectors on the target crtc. */ |
1802 | ret = drm_atomic_add_affected_connectors(state, set->crtc); | |
1803 | if (ret) | |
1804 | return ret; | |
042652ed | 1805 | |
df63b999 | 1806 | for_each_connector_in_state(state, connector, conn_state, i) { |
042652ed DV |
1807 | if (conn_state->crtc == set->crtc) { |
1808 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1809 | NULL); | |
1810 | if (ret) | |
1811 | return ret; | |
1812 | } | |
6ab520a2 | 1813 | } |
042652ed | 1814 | |
6ab520a2 ML |
1815 | /* Then set all connectors from set->connectors on the target crtc */ |
1816 | for (i = 0; i < set->num_connectors; i++) { | |
1817 | conn_state = drm_atomic_get_connector_state(state, | |
1818 | set->connectors[i]); | |
1819 | if (IS_ERR(conn_state)) | |
1820 | return PTR_ERR(conn_state); | |
1821 | ||
1822 | ret = drm_atomic_set_crtc_for_connector(conn_state, | |
1823 | set->crtc); | |
1824 | if (ret) | |
1825 | return ret; | |
042652ed DV |
1826 | } |
1827 | ||
df63b999 | 1828 | for_each_crtc_in_state(state, crtc, crtc_state, i) { |
042652ed DV |
1829 | /* Don't update ->enable for the CRTC in the set_config request, |
1830 | * since a mismatch would indicate a bug in the upper layers. | |
1831 | * The actual modeset code later on will catch any | |
1832 | * inconsistencies here. */ | |
1833 | if (crtc == set->crtc) | |
1834 | continue; | |
1835 | ||
14de6c44 | 1836 | if (!crtc_state->connector_mask) { |
c30f55a7 LP |
1837 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, |
1838 | NULL); | |
1839 | if (ret < 0) | |
1840 | return ret; | |
1841 | ||
9b5edbf7 | 1842 | crtc_state->active = false; |
c30f55a7 | 1843 | } |
042652ed DV |
1844 | } |
1845 | ||
1846 | return 0; | |
1847 | } | |
1848 | ||
1849 | /** | |
1850 | * drm_atomic_helper_set_config - set a new config from userspace | |
1851 | * @set: mode set configuration | |
1852 | * | |
1853 | * Provides a default crtc set_config handler using the atomic driver interface. | |
1854 | * | |
1855 | * Returns: | |
1856 | * Returns 0 on success, negative errno numbers on failure. | |
1857 | */ | |
1858 | int drm_atomic_helper_set_config(struct drm_mode_set *set) | |
1859 | { | |
1860 | struct drm_atomic_state *state; | |
1861 | struct drm_crtc *crtc = set->crtc; | |
042652ed DV |
1862 | int ret = 0; |
1863 | ||
1864 | state = drm_atomic_state_alloc(crtc->dev); | |
1865 | if (!state) | |
1866 | return -ENOMEM; | |
1867 | ||
40616a26 | 1868 | state->legacy_set_config = true; |
042652ed DV |
1869 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); |
1870 | retry: | |
bbb1e524 RC |
1871 | ret = __drm_atomic_helper_set_config(set, state); |
1872 | if (ret != 0) | |
042652ed | 1873 | goto fail; |
042652ed | 1874 | |
bbb1e524 RC |
1875 | ret = drm_atomic_commit(state); |
1876 | if (ret != 0) | |
e5b5341c | 1877 | goto fail; |
bbb1e524 RC |
1878 | |
1879 | /* Driver takes ownership of state on successful commit. */ | |
1880 | return 0; | |
1881 | fail: | |
1882 | if (ret == -EDEADLK) | |
1883 | goto backoff; | |
1884 | ||
1885 | drm_atomic_state_free(state); | |
1886 | ||
1887 | return ret; | |
1888 | backoff: | |
1889 | drm_atomic_state_clear(state); | |
1890 | drm_atomic_legacy_backoff(state); | |
1891 | ||
1892 | /* | |
1893 | * Someone might have exchanged the framebuffer while we dropped locks | |
1894 | * in the backoff code. We need to fix up the fb refcount tracking the | |
1895 | * core does for us. | |
1896 | */ | |
1897 | crtc->primary->old_fb = crtc->primary->fb; | |
1898 | ||
1899 | goto retry; | |
1900 | } | |
1901 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
1902 | ||
1903 | /* just used from fb-helper and atomic-helper: */ | |
1904 | int __drm_atomic_helper_set_config(struct drm_mode_set *set, | |
1905 | struct drm_atomic_state *state) | |
1906 | { | |
1907 | struct drm_crtc_state *crtc_state; | |
1908 | struct drm_plane_state *primary_state; | |
1909 | struct drm_crtc *crtc = set->crtc; | |
83926117 | 1910 | int hdisplay, vdisplay; |
bbb1e524 RC |
1911 | int ret; |
1912 | ||
1913 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
1914 | if (IS_ERR(crtc_state)) | |
1915 | return PTR_ERR(crtc_state); | |
1916 | ||
1917 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); | |
1918 | if (IS_ERR(primary_state)) | |
1919 | return PTR_ERR(primary_state); | |
e5b5341c | 1920 | |
042652ed DV |
1921 | if (!set->mode) { |
1922 | WARN_ON(set->fb); | |
1923 | WARN_ON(set->num_connectors); | |
1924 | ||
819364da DS |
1925 | ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); |
1926 | if (ret != 0) | |
bbb1e524 | 1927 | return ret; |
819364da | 1928 | |
eab3bbef | 1929 | crtc_state->active = false; |
e5b5341c | 1930 | |
07cc0ef6 | 1931 | ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
e5b5341c | 1932 | if (ret != 0) |
bbb1e524 | 1933 | return ret; |
e5b5341c RC |
1934 | |
1935 | drm_atomic_set_fb_for_plane(primary_state, NULL); | |
1936 | ||
042652ed DV |
1937 | goto commit; |
1938 | } | |
1939 | ||
1940 | WARN_ON(!set->fb); | |
1941 | WARN_ON(!set->num_connectors); | |
1942 | ||
819364da DS |
1943 | ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); |
1944 | if (ret != 0) | |
bbb1e524 | 1945 | return ret; |
819364da | 1946 | |
eab3bbef | 1947 | crtc_state->active = true; |
042652ed | 1948 | |
07cc0ef6 | 1949 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
042652ed | 1950 | if (ret != 0) |
bbb1e524 RC |
1951 | return ret; |
1952 | ||
83926117 VS |
1953 | drm_crtc_get_hv_timing(set->mode, &hdisplay, &vdisplay); |
1954 | ||
321ebf04 | 1955 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
042652ed DV |
1956 | primary_state->crtc_x = 0; |
1957 | primary_state->crtc_y = 0; | |
83926117 | 1958 | primary_state->crtc_w = hdisplay; |
02e6f379 | 1959 | primary_state->crtc_h = vdisplay; |
042652ed DV |
1960 | primary_state->src_x = set->x << 16; |
1961 | primary_state->src_y = set->y << 16; | |
41121248 | 1962 | if (primary_state->rotation & (BIT(DRM_ROTATE_90) | BIT(DRM_ROTATE_270))) { |
83926117 | 1963 | primary_state->src_w = vdisplay << 16; |
02e6f379 | 1964 | primary_state->src_h = hdisplay << 16; |
41121248 | 1965 | } else { |
83926117 | 1966 | primary_state->src_w = hdisplay << 16; |
02e6f379 | 1967 | primary_state->src_h = vdisplay << 16; |
41121248 | 1968 | } |
042652ed DV |
1969 | |
1970 | commit: | |
1971 | ret = update_output_state(state, set); | |
1972 | if (ret) | |
bbb1e524 | 1973 | return ret; |
042652ed | 1974 | |
042652ed | 1975 | return 0; |
042652ed | 1976 | } |
042652ed | 1977 | |
14942760 TR |
1978 | /** |
1979 | * drm_atomic_helper_disable_all - disable all currently active outputs | |
1980 | * @dev: DRM device | |
1981 | * @ctx: lock acquisition context | |
1982 | * | |
1983 | * Loops through all connectors, finding those that aren't turned off and then | |
1984 | * turns them off by setting their DPMS mode to OFF and deactivating the CRTC | |
1985 | * that they are connected to. | |
1986 | * | |
1987 | * This is used for example in suspend/resume to disable all currently active | |
1988 | * functions when suspending. | |
1989 | * | |
1990 | * Note that if callers haven't already acquired all modeset locks this might | |
1991 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
1992 | * | |
1993 | * Returns: | |
1994 | * 0 on success or a negative error code on failure. | |
1995 | * | |
1996 | * See also: | |
1997 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
1998 | */ | |
1999 | int drm_atomic_helper_disable_all(struct drm_device *dev, | |
2000 | struct drm_modeset_acquire_ctx *ctx) | |
2001 | { | |
2002 | struct drm_atomic_state *state; | |
2003 | struct drm_connector *conn; | |
2004 | int err; | |
2005 | ||
2006 | state = drm_atomic_state_alloc(dev); | |
2007 | if (!state) | |
2008 | return -ENOMEM; | |
2009 | ||
2010 | state->acquire_ctx = ctx; | |
2011 | ||
2012 | drm_for_each_connector(conn, dev) { | |
2013 | struct drm_crtc *crtc = conn->state->crtc; | |
2014 | struct drm_crtc_state *crtc_state; | |
2015 | ||
2016 | if (!crtc || conn->dpms != DRM_MODE_DPMS_ON) | |
2017 | continue; | |
2018 | ||
2019 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2020 | if (IS_ERR(crtc_state)) { | |
2021 | err = PTR_ERR(crtc_state); | |
2022 | goto free; | |
2023 | } | |
2024 | ||
2025 | crtc_state->active = false; | |
2026 | } | |
2027 | ||
2028 | err = drm_atomic_commit(state); | |
2029 | ||
2030 | free: | |
2031 | if (err < 0) | |
2032 | drm_atomic_state_free(state); | |
2033 | ||
2034 | return err; | |
2035 | } | |
2036 | EXPORT_SYMBOL(drm_atomic_helper_disable_all); | |
2037 | ||
2038 | /** | |
2039 | * drm_atomic_helper_suspend - subsystem-level suspend helper | |
2040 | * @dev: DRM device | |
2041 | * | |
2042 | * Duplicates the current atomic state, disables all active outputs and then | |
2043 | * returns a pointer to the original atomic state to the caller. Drivers can | |
2044 | * pass this pointer to the drm_atomic_helper_resume() helper upon resume to | |
2045 | * restore the output configuration that was active at the time the system | |
2046 | * entered suspend. | |
2047 | * | |
2048 | * Note that it is potentially unsafe to use this. The atomic state object | |
2049 | * returned by this function is assumed to be persistent. Drivers must ensure | |
2050 | * that this holds true. Before calling this function, drivers must make sure | |
2051 | * to suspend fbdev emulation so that nothing can be using the device. | |
2052 | * | |
2053 | * Returns: | |
2054 | * A pointer to a copy of the state before suspend on success or an ERR_PTR()- | |
2055 | * encoded error code on failure. Drivers should store the returned atomic | |
2056 | * state object and pass it to the drm_atomic_helper_resume() helper upon | |
2057 | * resume. | |
2058 | * | |
2059 | * See also: | |
2060 | * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), | |
2061 | * drm_atomic_helper_resume() | |
2062 | */ | |
2063 | struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) | |
2064 | { | |
2065 | struct drm_modeset_acquire_ctx ctx; | |
2066 | struct drm_atomic_state *state; | |
2067 | int err; | |
2068 | ||
2069 | drm_modeset_acquire_init(&ctx, 0); | |
2070 | ||
2071 | retry: | |
2072 | err = drm_modeset_lock_all_ctx(dev, &ctx); | |
2073 | if (err < 0) { | |
2074 | state = ERR_PTR(err); | |
2075 | goto unlock; | |
2076 | } | |
2077 | ||
2078 | state = drm_atomic_helper_duplicate_state(dev, &ctx); | |
2079 | if (IS_ERR(state)) | |
2080 | goto unlock; | |
2081 | ||
2082 | err = drm_atomic_helper_disable_all(dev, &ctx); | |
2083 | if (err < 0) { | |
2084 | drm_atomic_state_free(state); | |
2085 | state = ERR_PTR(err); | |
2086 | goto unlock; | |
2087 | } | |
2088 | ||
2089 | unlock: | |
2090 | if (PTR_ERR(state) == -EDEADLK) { | |
2091 | drm_modeset_backoff(&ctx); | |
2092 | goto retry; | |
2093 | } | |
2094 | ||
2095 | drm_modeset_drop_locks(&ctx); | |
2096 | drm_modeset_acquire_fini(&ctx); | |
2097 | return state; | |
2098 | } | |
2099 | EXPORT_SYMBOL(drm_atomic_helper_suspend); | |
2100 | ||
2101 | /** | |
2102 | * drm_atomic_helper_resume - subsystem-level resume helper | |
2103 | * @dev: DRM device | |
2104 | * @state: atomic state to resume to | |
2105 | * | |
2106 | * Calls drm_mode_config_reset() to synchronize hardware and software states, | |
2107 | * grabs all modeset locks and commits the atomic state object. This can be | |
2108 | * used in conjunction with the drm_atomic_helper_suspend() helper to | |
2109 | * implement suspend/resume for drivers that support atomic mode-setting. | |
2110 | * | |
2111 | * Returns: | |
2112 | * 0 on success or a negative error code on failure. | |
2113 | * | |
2114 | * See also: | |
2115 | * drm_atomic_helper_suspend() | |
2116 | */ | |
2117 | int drm_atomic_helper_resume(struct drm_device *dev, | |
2118 | struct drm_atomic_state *state) | |
2119 | { | |
2120 | struct drm_mode_config *config = &dev->mode_config; | |
2121 | int err; | |
2122 | ||
2123 | drm_mode_config_reset(dev); | |
2124 | drm_modeset_lock_all(dev); | |
2125 | state->acquire_ctx = config->acquire_ctx; | |
2126 | err = drm_atomic_commit(state); | |
2127 | drm_modeset_unlock_all(dev); | |
2128 | ||
2129 | return err; | |
2130 | } | |
2131 | EXPORT_SYMBOL(drm_atomic_helper_resume); | |
2132 | ||
042652ed | 2133 | /** |
7f50002f | 2134 | * drm_atomic_helper_crtc_set_property - helper for crtc properties |
042652ed DV |
2135 | * @crtc: DRM crtc |
2136 | * @property: DRM property | |
2137 | * @val: value of property | |
2138 | * | |
7f50002f LP |
2139 | * Provides a default crtc set_property handler using the atomic driver |
2140 | * interface. | |
042652ed DV |
2141 | * |
2142 | * RETURNS: | |
2143 | * Zero on success, error code on failure | |
2144 | */ | |
2145 | int | |
2146 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
2147 | struct drm_property *property, | |
2148 | uint64_t val) | |
2149 | { | |
2150 | struct drm_atomic_state *state; | |
2151 | struct drm_crtc_state *crtc_state; | |
2152 | int ret = 0; | |
2153 | ||
2154 | state = drm_atomic_state_alloc(crtc->dev); | |
2155 | if (!state) | |
2156 | return -ENOMEM; | |
2157 | ||
2158 | /* ->set_property is always called with all locks held. */ | |
2159 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
2160 | retry: | |
2161 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2162 | if (IS_ERR(crtc_state)) { | |
2163 | ret = PTR_ERR(crtc_state); | |
2164 | goto fail; | |
2165 | } | |
2166 | ||
40ecc694 RC |
2167 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
2168 | property, val); | |
042652ed DV |
2169 | if (ret) |
2170 | goto fail; | |
2171 | ||
2172 | ret = drm_atomic_commit(state); | |
2173 | if (ret != 0) | |
2174 | goto fail; | |
2175 | ||
2176 | /* Driver takes ownership of state on successful commit. */ | |
2177 | return 0; | |
2178 | fail: | |
2179 | if (ret == -EDEADLK) | |
2180 | goto backoff; | |
2181 | ||
2182 | drm_atomic_state_free(state); | |
2183 | ||
2184 | return ret; | |
2185 | backoff: | |
042652ed | 2186 | drm_atomic_state_clear(state); |
6f75cea6 | 2187 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2188 | |
2189 | goto retry; | |
2190 | } | |
2191 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
2192 | ||
2193 | /** | |
7f50002f | 2194 | * drm_atomic_helper_plane_set_property - helper for plane properties |
042652ed DV |
2195 | * @plane: DRM plane |
2196 | * @property: DRM property | |
2197 | * @val: value of property | |
2198 | * | |
7f50002f LP |
2199 | * Provides a default plane set_property handler using the atomic driver |
2200 | * interface. | |
042652ed DV |
2201 | * |
2202 | * RETURNS: | |
2203 | * Zero on success, error code on failure | |
2204 | */ | |
2205 | int | |
2206 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
2207 | struct drm_property *property, | |
2208 | uint64_t val) | |
2209 | { | |
2210 | struct drm_atomic_state *state; | |
2211 | struct drm_plane_state *plane_state; | |
2212 | int ret = 0; | |
2213 | ||
2214 | state = drm_atomic_state_alloc(plane->dev); | |
2215 | if (!state) | |
2216 | return -ENOMEM; | |
2217 | ||
2218 | /* ->set_property is always called with all locks held. */ | |
2219 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
2220 | retry: | |
2221 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2222 | if (IS_ERR(plane_state)) { | |
2223 | ret = PTR_ERR(plane_state); | |
2224 | goto fail; | |
2225 | } | |
2226 | ||
40ecc694 RC |
2227 | ret = drm_atomic_plane_set_property(plane, plane_state, |
2228 | property, val); | |
042652ed DV |
2229 | if (ret) |
2230 | goto fail; | |
2231 | ||
2232 | ret = drm_atomic_commit(state); | |
2233 | if (ret != 0) | |
2234 | goto fail; | |
2235 | ||
2236 | /* Driver takes ownership of state on successful commit. */ | |
2237 | return 0; | |
2238 | fail: | |
2239 | if (ret == -EDEADLK) | |
2240 | goto backoff; | |
2241 | ||
2242 | drm_atomic_state_free(state); | |
2243 | ||
2244 | return ret; | |
2245 | backoff: | |
042652ed | 2246 | drm_atomic_state_clear(state); |
6f75cea6 | 2247 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2248 | |
2249 | goto retry; | |
2250 | } | |
2251 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
2252 | ||
2253 | /** | |
7f50002f | 2254 | * drm_atomic_helper_connector_set_property - helper for connector properties |
042652ed DV |
2255 | * @connector: DRM connector |
2256 | * @property: DRM property | |
2257 | * @val: value of property | |
2258 | * | |
7f50002f LP |
2259 | * Provides a default connector set_property handler using the atomic driver |
2260 | * interface. | |
042652ed DV |
2261 | * |
2262 | * RETURNS: | |
2263 | * Zero on success, error code on failure | |
2264 | */ | |
2265 | int | |
2266 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
2267 | struct drm_property *property, | |
2268 | uint64_t val) | |
2269 | { | |
2270 | struct drm_atomic_state *state; | |
2271 | struct drm_connector_state *connector_state; | |
2272 | int ret = 0; | |
2273 | ||
2274 | state = drm_atomic_state_alloc(connector->dev); | |
2275 | if (!state) | |
2276 | return -ENOMEM; | |
2277 | ||
2278 | /* ->set_property is always called with all locks held. */ | |
2279 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
2280 | retry: | |
2281 | connector_state = drm_atomic_get_connector_state(state, connector); | |
2282 | if (IS_ERR(connector_state)) { | |
2283 | ret = PTR_ERR(connector_state); | |
2284 | goto fail; | |
2285 | } | |
2286 | ||
40ecc694 RC |
2287 | ret = drm_atomic_connector_set_property(connector, connector_state, |
2288 | property, val); | |
042652ed DV |
2289 | if (ret) |
2290 | goto fail; | |
2291 | ||
2292 | ret = drm_atomic_commit(state); | |
2293 | if (ret != 0) | |
2294 | goto fail; | |
2295 | ||
2296 | /* Driver takes ownership of state on successful commit. */ | |
2297 | return 0; | |
2298 | fail: | |
2299 | if (ret == -EDEADLK) | |
2300 | goto backoff; | |
2301 | ||
2302 | drm_atomic_state_free(state); | |
2303 | ||
2304 | return ret; | |
2305 | backoff: | |
042652ed | 2306 | drm_atomic_state_clear(state); |
6f75cea6 | 2307 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2308 | |
2309 | goto retry; | |
2310 | } | |
2311 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 DV |
2312 | |
2313 | /** | |
2314 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
2315 | * @crtc: DRM crtc | |
2316 | * @fb: DRM framebuffer | |
2317 | * @event: optional DRM event to signal upon completion | |
2318 | * @flags: flip flags for non-vblank sync'ed updates | |
2319 | * | |
2320 | * Provides a default page flip implementation using the atomic driver interface. | |
2321 | * | |
2322 | * Note that for now so called async page flips (i.e. updates which are not | |
2323 | * synchronized to vblank) are not supported, since the atomic interfaces have | |
2324 | * no provisions for this yet. | |
2325 | * | |
2326 | * Returns: | |
2327 | * Returns 0 on success, negative errno numbers on failure. | |
2328 | */ | |
2329 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
2330 | struct drm_framebuffer *fb, | |
2331 | struct drm_pending_vblank_event *event, | |
2332 | uint32_t flags) | |
2333 | { | |
2334 | struct drm_plane *plane = crtc->primary; | |
2335 | struct drm_atomic_state *state; | |
2336 | struct drm_plane_state *plane_state; | |
2337 | struct drm_crtc_state *crtc_state; | |
2338 | int ret = 0; | |
2339 | ||
2340 | if (flags & DRM_MODE_PAGE_FLIP_ASYNC) | |
2341 | return -EINVAL; | |
2342 | ||
2343 | state = drm_atomic_state_alloc(plane->dev); | |
2344 | if (!state) | |
2345 | return -ENOMEM; | |
2346 | ||
2347 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2348 | retry: | |
2349 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2350 | if (IS_ERR(crtc_state)) { | |
2351 | ret = PTR_ERR(crtc_state); | |
2352 | goto fail; | |
2353 | } | |
2354 | crtc_state->event = event; | |
2355 | ||
2356 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2357 | if (IS_ERR(plane_state)) { | |
2358 | ret = PTR_ERR(plane_state); | |
2359 | goto fail; | |
2360 | } | |
2361 | ||
07cc0ef6 | 2362 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
8bc0f312 DV |
2363 | if (ret != 0) |
2364 | goto fail; | |
321ebf04 | 2365 | drm_atomic_set_fb_for_plane(plane_state, fb); |
8bc0f312 | 2366 | |
4cba6850 DV |
2367 | /* Make sure we don't accidentally do a full modeset. */ |
2368 | state->allow_modeset = false; | |
2369 | if (!crtc_state->active) { | |
2370 | DRM_DEBUG_ATOMIC("[CRTC:%d] disabled, rejecting legacy flip\n", | |
2371 | crtc->base.id); | |
2372 | ret = -EINVAL; | |
2373 | goto fail; | |
2374 | } | |
2375 | ||
b837ba0a | 2376 | ret = drm_atomic_nonblocking_commit(state); |
8bc0f312 DV |
2377 | if (ret != 0) |
2378 | goto fail; | |
2379 | ||
b837ba0a | 2380 | /* Driver takes ownership of state on successful commit. */ |
8bc0f312 DV |
2381 | return 0; |
2382 | fail: | |
2383 | if (ret == -EDEADLK) | |
2384 | goto backoff; | |
2385 | ||
2386 | drm_atomic_state_free(state); | |
2387 | ||
2388 | return ret; | |
2389 | backoff: | |
8bc0f312 | 2390 | drm_atomic_state_clear(state); |
6f75cea6 | 2391 | drm_atomic_legacy_backoff(state); |
8bc0f312 DV |
2392 | |
2393 | /* | |
2394 | * Someone might have exchanged the framebuffer while we dropped locks | |
2395 | * in the backoff code. We need to fix up the fb refcount tracking the | |
2396 | * core does for us. | |
2397 | */ | |
2398 | plane->old_fb = plane->fb; | |
2399 | ||
2400 | goto retry; | |
2401 | } | |
2402 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
d461701c | 2403 | |
b486e0e6 DV |
2404 | /** |
2405 | * drm_atomic_helper_connector_dpms() - connector dpms helper implementation | |
2406 | * @connector: affected connector | |
2407 | * @mode: DPMS mode | |
2408 | * | |
2409 | * This is the main helper function provided by the atomic helper framework for | |
2410 | * implementing the legacy DPMS connector interface. It computes the new desired | |
2411 | * ->active state for the corresponding CRTC (if the connector is enabled) and | |
2412 | * updates it. | |
9a69a9ac ML |
2413 | * |
2414 | * Returns: | |
2415 | * Returns 0 on success, negative errno numbers on failure. | |
b486e0e6 | 2416 | */ |
9a69a9ac ML |
2417 | int drm_atomic_helper_connector_dpms(struct drm_connector *connector, |
2418 | int mode) | |
b486e0e6 DV |
2419 | { |
2420 | struct drm_mode_config *config = &connector->dev->mode_config; | |
2421 | struct drm_atomic_state *state; | |
2422 | struct drm_crtc_state *crtc_state; | |
2423 | struct drm_crtc *crtc; | |
2424 | struct drm_connector *tmp_connector; | |
2425 | int ret; | |
2426 | bool active = false; | |
9a69a9ac | 2427 | int old_mode = connector->dpms; |
b486e0e6 DV |
2428 | |
2429 | if (mode != DRM_MODE_DPMS_ON) | |
2430 | mode = DRM_MODE_DPMS_OFF; | |
2431 | ||
2432 | connector->dpms = mode; | |
2433 | crtc = connector->state->crtc; | |
2434 | ||
2435 | if (!crtc) | |
9a69a9ac | 2436 | return 0; |
b486e0e6 | 2437 | |
b486e0e6 DV |
2438 | state = drm_atomic_state_alloc(connector->dev); |
2439 | if (!state) | |
9a69a9ac | 2440 | return -ENOMEM; |
b486e0e6 DV |
2441 | |
2442 | state->acquire_ctx = drm_modeset_legacy_acquire_ctx(crtc); | |
2443 | retry: | |
2444 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
9a69a9ac ML |
2445 | if (IS_ERR(crtc_state)) { |
2446 | ret = PTR_ERR(crtc_state); | |
2447 | goto fail; | |
2448 | } | |
b486e0e6 DV |
2449 | |
2450 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
2451 | ||
9a9f5ce8 | 2452 | drm_for_each_connector(tmp_connector, connector->dev) { |
0388df05 | 2453 | if (tmp_connector->state->crtc != crtc) |
b486e0e6 DV |
2454 | continue; |
2455 | ||
0388df05 | 2456 | if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { |
b486e0e6 DV |
2457 | active = true; |
2458 | break; | |
2459 | } | |
2460 | } | |
2461 | crtc_state->active = active; | |
2462 | ||
2463 | ret = drm_atomic_commit(state); | |
2464 | if (ret != 0) | |
2465 | goto fail; | |
2466 | ||
9a69a9ac ML |
2467 | /* Driver takes ownership of state on successful commit. */ |
2468 | return 0; | |
b486e0e6 DV |
2469 | fail: |
2470 | if (ret == -EDEADLK) | |
2471 | goto backoff; | |
2472 | ||
9a69a9ac | 2473 | connector->dpms = old_mode; |
b486e0e6 DV |
2474 | drm_atomic_state_free(state); |
2475 | ||
9a69a9ac | 2476 | return ret; |
b486e0e6 DV |
2477 | backoff: |
2478 | drm_atomic_state_clear(state); | |
2479 | drm_atomic_legacy_backoff(state); | |
2480 | ||
2481 | goto retry; | |
2482 | } | |
2483 | EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); | |
2484 | ||
3150c7d0 DV |
2485 | /** |
2486 | * DOC: atomic state reset and initialization | |
2487 | * | |
2488 | * Both the drm core and the atomic helpers assume that there is always the full | |
2489 | * and correct atomic software state for all connectors, CRTCs and planes | |
2490 | * available. Which is a bit a problem on driver load and also after system | |
2491 | * suspend. One way to solve this is to have a hardware state read-out | |
2492 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
2493 | * driver). | |
2494 | * | |
2495 | * The simpler solution is to just reset the software state to everything off, | |
2496 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
2497 | * the atomic helpers provide default reset implementations for all hooks. | |
7f8ee3e5 DV |
2498 | * |
2499 | * On the upside the precise state tracking of atomic simplifies system suspend | |
2500 | * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe | |
2501 | * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume(). | |
2502 | * For other drivers the building blocks are split out, see the documentation | |
2503 | * for these functions. | |
3150c7d0 DV |
2504 | */ |
2505 | ||
d461701c DV |
2506 | /** |
2507 | * drm_atomic_helper_crtc_reset - default ->reset hook for CRTCs | |
2508 | * @crtc: drm CRTC | |
2509 | * | |
2510 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
2511 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2512 | */ | |
2513 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
2514 | { | |
b0b5511b DV |
2515 | if (crtc->state) |
2516 | __drm_atomic_helper_crtc_destroy_state(crtc, crtc->state); | |
2517 | ||
d461701c DV |
2518 | kfree(crtc->state); |
2519 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
07cc0ef6 DV |
2520 | |
2521 | if (crtc->state) | |
2522 | crtc->state->crtc = crtc; | |
d461701c DV |
2523 | } |
2524 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
2525 | ||
f5e7840b TR |
2526 | /** |
2527 | * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state | |
2528 | * @crtc: CRTC object | |
2529 | * @state: atomic CRTC state | |
2530 | * | |
2531 | * Copies atomic state from a CRTC's current state and resets inferred values. | |
2532 | * This is useful for drivers that subclass the CRTC state. | |
2533 | */ | |
2534 | void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc, | |
2535 | struct drm_crtc_state *state) | |
2536 | { | |
2537 | memcpy(state, crtc->state, sizeof(*state)); | |
2538 | ||
99cf4a29 DS |
2539 | if (state->mode_blob) |
2540 | drm_property_reference_blob(state->mode_blob); | |
5488dc16 LL |
2541 | if (state->degamma_lut) |
2542 | drm_property_reference_blob(state->degamma_lut); | |
2543 | if (state->ctm) | |
2544 | drm_property_reference_blob(state->ctm); | |
2545 | if (state->gamma_lut) | |
2546 | drm_property_reference_blob(state->gamma_lut); | |
f5e7840b TR |
2547 | state->mode_changed = false; |
2548 | state->active_changed = false; | |
2549 | state->planes_changed = false; | |
fc596660 | 2550 | state->connectors_changed = false; |
5488dc16 | 2551 | state->color_mgmt_changed = false; |
f5e7840b TR |
2552 | state->event = NULL; |
2553 | } | |
2554 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state); | |
2555 | ||
d461701c DV |
2556 | /** |
2557 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
2558 | * @crtc: drm CRTC | |
2559 | * | |
2560 | * Default CRTC state duplicate hook for drivers which don't have their own | |
2561 | * subclassed CRTC state structure. | |
2562 | */ | |
2563 | struct drm_crtc_state * | |
2564 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
2565 | { | |
2566 | struct drm_crtc_state *state; | |
2567 | ||
2568 | if (WARN_ON(!crtc->state)) | |
2569 | return NULL; | |
2570 | ||
f5e7840b TR |
2571 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2572 | if (state) | |
2573 | __drm_atomic_helper_crtc_duplicate_state(crtc, state); | |
d461701c DV |
2574 | |
2575 | return state; | |
2576 | } | |
2577 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
2578 | ||
f5e7840b TR |
2579 | /** |
2580 | * __drm_atomic_helper_crtc_destroy_state - release CRTC state | |
2581 | * @crtc: CRTC object | |
2582 | * @state: CRTC state object to release | |
2583 | * | |
2584 | * Releases all resources stored in the CRTC state without actually freeing | |
2585 | * the memory of the CRTC state. This is useful for drivers that subclass the | |
2586 | * CRTC state. | |
2587 | */ | |
2588 | void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
2589 | struct drm_crtc_state *state) | |
2590 | { | |
5f911905 | 2591 | drm_property_unreference_blob(state->mode_blob); |
5488dc16 LL |
2592 | drm_property_unreference_blob(state->degamma_lut); |
2593 | drm_property_unreference_blob(state->ctm); | |
2594 | drm_property_unreference_blob(state->gamma_lut); | |
f5e7840b TR |
2595 | } |
2596 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); | |
2597 | ||
d461701c DV |
2598 | /** |
2599 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
2600 | * @crtc: drm CRTC | |
2601 | * @state: CRTC state object to release | |
2602 | * | |
2603 | * Default CRTC state destroy hook for drivers which don't have their own | |
2604 | * subclassed CRTC state structure. | |
2605 | */ | |
2606 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
2607 | struct drm_crtc_state *state) | |
2608 | { | |
f5e7840b | 2609 | __drm_atomic_helper_crtc_destroy_state(crtc, state); |
d461701c DV |
2610 | kfree(state); |
2611 | } | |
2612 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
2613 | ||
2614 | /** | |
2615 | * drm_atomic_helper_plane_reset - default ->reset hook for planes | |
2616 | * @plane: drm plane | |
2617 | * | |
2618 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
2619 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
2620 | */ | |
2621 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
2622 | { | |
b0b5511b DV |
2623 | if (plane->state) |
2624 | __drm_atomic_helper_plane_destroy_state(plane, plane->state); | |
321ebf04 | 2625 | |
d461701c DV |
2626 | kfree(plane->state); |
2627 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
07cc0ef6 | 2628 | |
25aaa3a1 | 2629 | if (plane->state) { |
07cc0ef6 | 2630 | plane->state->plane = plane; |
25aaa3a1 MS |
2631 | plane->state->rotation = BIT(DRM_ROTATE_0); |
2632 | } | |
d461701c DV |
2633 | } |
2634 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
2635 | ||
f5e7840b TR |
2636 | /** |
2637 | * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state | |
2638 | * @plane: plane object | |
2639 | * @state: atomic plane state | |
2640 | * | |
2641 | * Copies atomic state from a plane's current state. This is useful for | |
2642 | * drivers that subclass the plane state. | |
2643 | */ | |
2644 | void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane, | |
2645 | struct drm_plane_state *state) | |
2646 | { | |
2647 | memcpy(state, plane->state, sizeof(*state)); | |
2648 | ||
2649 | if (state->fb) | |
2650 | drm_framebuffer_reference(state->fb); | |
2651 | } | |
2652 | EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state); | |
2653 | ||
d461701c DV |
2654 | /** |
2655 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
2656 | * @plane: drm plane | |
2657 | * | |
2658 | * Default plane state duplicate hook for drivers which don't have their own | |
2659 | * subclassed plane state structure. | |
2660 | */ | |
2661 | struct drm_plane_state * | |
2662 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
2663 | { | |
321ebf04 DV |
2664 | struct drm_plane_state *state; |
2665 | ||
d461701c DV |
2666 | if (WARN_ON(!plane->state)) |
2667 | return NULL; | |
2668 | ||
f5e7840b TR |
2669 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2670 | if (state) | |
2671 | __drm_atomic_helper_plane_duplicate_state(plane, state); | |
321ebf04 DV |
2672 | |
2673 | return state; | |
d461701c DV |
2674 | } |
2675 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
2676 | ||
f5e7840b TR |
2677 | /** |
2678 | * __drm_atomic_helper_plane_destroy_state - release plane state | |
2679 | * @plane: plane object | |
2680 | * @state: plane state object to release | |
2681 | * | |
2682 | * Releases all resources stored in the plane state without actually freeing | |
2683 | * the memory of the plane state. This is useful for drivers that subclass the | |
2684 | * plane state. | |
2685 | */ | |
2686 | void __drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
2687 | struct drm_plane_state *state) | |
2688 | { | |
2689 | if (state->fb) | |
2690 | drm_framebuffer_unreference(state->fb); | |
2691 | } | |
2692 | EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state); | |
2693 | ||
d461701c DV |
2694 | /** |
2695 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
2696 | * @plane: drm plane | |
2697 | * @state: plane state object to release | |
2698 | * | |
2699 | * Default plane state destroy hook for drivers which don't have their own | |
2700 | * subclassed plane state structure. | |
2701 | */ | |
2702 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
321ebf04 | 2703 | struct drm_plane_state *state) |
d461701c | 2704 | { |
f5e7840b | 2705 | __drm_atomic_helper_plane_destroy_state(plane, state); |
d461701c DV |
2706 | kfree(state); |
2707 | } | |
2708 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
2709 | ||
4cd39917 ML |
2710 | /** |
2711 | * __drm_atomic_helper_connector_reset - reset state on connector | |
2712 | * @connector: drm connector | |
2713 | * @conn_state: connector state to assign | |
2714 | * | |
2715 | * Initializes the newly allocated @conn_state and assigns it to | |
2716 | * #connector ->state, usually required when initializing the drivers | |
2717 | * or when called from the ->reset hook. | |
2718 | * | |
2719 | * This is useful for drivers that subclass the connector state. | |
2720 | */ | |
2721 | void | |
2722 | __drm_atomic_helper_connector_reset(struct drm_connector *connector, | |
2723 | struct drm_connector_state *conn_state) | |
2724 | { | |
2725 | if (conn_state) | |
2726 | conn_state->connector = connector; | |
2727 | ||
2728 | connector->state = conn_state; | |
2729 | } | |
2730 | EXPORT_SYMBOL(__drm_atomic_helper_connector_reset); | |
2731 | ||
d461701c DV |
2732 | /** |
2733 | * drm_atomic_helper_connector_reset - default ->reset hook for connectors | |
2734 | * @connector: drm connector | |
2735 | * | |
2736 | * Resets the atomic state for @connector by freeing the state pointer (which | |
2737 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
2738 | * object. | |
2739 | */ | |
2740 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
2741 | { | |
4cd39917 ML |
2742 | struct drm_connector_state *conn_state = |
2743 | kzalloc(sizeof(*conn_state), GFP_KERNEL); | |
07cc0ef6 | 2744 | |
b0b5511b DV |
2745 | if (connector->state) |
2746 | __drm_atomic_helper_connector_destroy_state(connector, | |
2747 | connector->state); | |
2748 | ||
4cd39917 ML |
2749 | kfree(connector->state); |
2750 | __drm_atomic_helper_connector_reset(connector, conn_state); | |
d461701c DV |
2751 | } |
2752 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
2753 | ||
f5e7840b TR |
2754 | /** |
2755 | * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state | |
2756 | * @connector: connector object | |
2757 | * @state: atomic connector state | |
2758 | * | |
2759 | * Copies atomic state from a connector's current state. This is useful for | |
2760 | * drivers that subclass the connector state. | |
2761 | */ | |
2762 | void | |
2763 | __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector, | |
2764 | struct drm_connector_state *state) | |
2765 | { | |
2766 | memcpy(state, connector->state, sizeof(*state)); | |
d2307dea DA |
2767 | if (state->crtc) |
2768 | drm_connector_reference(connector); | |
f5e7840b TR |
2769 | } |
2770 | EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state); | |
2771 | ||
d461701c DV |
2772 | /** |
2773 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
2774 | * @connector: drm connector | |
2775 | * | |
2776 | * Default connector state duplicate hook for drivers which don't have their own | |
2777 | * subclassed connector state structure. | |
2778 | */ | |
2779 | struct drm_connector_state * | |
2780 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
2781 | { | |
f5e7840b TR |
2782 | struct drm_connector_state *state; |
2783 | ||
d461701c DV |
2784 | if (WARN_ON(!connector->state)) |
2785 | return NULL; | |
2786 | ||
f5e7840b TR |
2787 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
2788 | if (state) | |
2789 | __drm_atomic_helper_connector_duplicate_state(connector, state); | |
2790 | ||
2791 | return state; | |
d461701c DV |
2792 | } |
2793 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
2794 | ||
397fd77c TR |
2795 | /** |
2796 | * drm_atomic_helper_duplicate_state - duplicate an atomic state object | |
2797 | * @dev: DRM device | |
2798 | * @ctx: lock acquisition context | |
2799 | * | |
2800 | * Makes a copy of the current atomic state by looping over all objects and | |
14942760 TR |
2801 | * duplicating their respective states. This is used for example by suspend/ |
2802 | * resume support code to save the state prior to suspend such that it can | |
2803 | * be restored upon resume. | |
397fd77c TR |
2804 | * |
2805 | * Note that this treats atomic state as persistent between save and restore. | |
2806 | * Drivers must make sure that this is possible and won't result in confusion | |
2807 | * or erroneous behaviour. | |
2808 | * | |
2809 | * Note that if callers haven't already acquired all modeset locks this might | |
2810 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
2811 | * | |
2812 | * Returns: | |
2813 | * A pointer to the copy of the atomic state object on success or an | |
2814 | * ERR_PTR()-encoded error code on failure. | |
14942760 TR |
2815 | * |
2816 | * See also: | |
2817 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
397fd77c TR |
2818 | */ |
2819 | struct drm_atomic_state * | |
2820 | drm_atomic_helper_duplicate_state(struct drm_device *dev, | |
2821 | struct drm_modeset_acquire_ctx *ctx) | |
2822 | { | |
2823 | struct drm_atomic_state *state; | |
2824 | struct drm_connector *conn; | |
2825 | struct drm_plane *plane; | |
2826 | struct drm_crtc *crtc; | |
2827 | int err = 0; | |
2828 | ||
2829 | state = drm_atomic_state_alloc(dev); | |
2830 | if (!state) | |
2831 | return ERR_PTR(-ENOMEM); | |
2832 | ||
2833 | state->acquire_ctx = ctx; | |
2834 | ||
2835 | drm_for_each_crtc(crtc, dev) { | |
2836 | struct drm_crtc_state *crtc_state; | |
2837 | ||
2838 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2839 | if (IS_ERR(crtc_state)) { | |
2840 | err = PTR_ERR(crtc_state); | |
2841 | goto free; | |
2842 | } | |
2843 | } | |
2844 | ||
2845 | drm_for_each_plane(plane, dev) { | |
2846 | struct drm_plane_state *plane_state; | |
2847 | ||
2848 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2849 | if (IS_ERR(plane_state)) { | |
2850 | err = PTR_ERR(plane_state); | |
2851 | goto free; | |
2852 | } | |
2853 | } | |
2854 | ||
2855 | drm_for_each_connector(conn, dev) { | |
2856 | struct drm_connector_state *conn_state; | |
2857 | ||
2858 | conn_state = drm_atomic_get_connector_state(state, conn); | |
2859 | if (IS_ERR(conn_state)) { | |
2860 | err = PTR_ERR(conn_state); | |
2861 | goto free; | |
2862 | } | |
2863 | } | |
2864 | ||
2865 | /* clear the acquire context so that it isn't accidentally reused */ | |
2866 | state->acquire_ctx = NULL; | |
2867 | ||
2868 | free: | |
2869 | if (err < 0) { | |
2870 | drm_atomic_state_free(state); | |
2871 | state = ERR_PTR(err); | |
2872 | } | |
2873 | ||
2874 | return state; | |
2875 | } | |
2876 | EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); | |
2877 | ||
f5e7840b TR |
2878 | /** |
2879 | * __drm_atomic_helper_connector_destroy_state - release connector state | |
2880 | * @connector: connector object | |
2881 | * @state: connector state object to release | |
2882 | * | |
2883 | * Releases all resources stored in the connector state without actually | |
2884 | * freeing the memory of the connector state. This is useful for drivers that | |
2885 | * subclass the connector state. | |
2886 | */ | |
2887 | void | |
2888 | __drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
2889 | struct drm_connector_state *state) | |
2890 | { | |
2891 | /* | |
2892 | * This is currently a placeholder so that drivers that subclass the | |
2893 | * state will automatically do the right thing if code is ever added | |
2894 | * to this function. | |
2895 | */ | |
d2307dea DA |
2896 | if (state->crtc) |
2897 | drm_connector_unreference(state->connector); | |
f5e7840b TR |
2898 | } |
2899 | EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state); | |
2900 | ||
d461701c DV |
2901 | /** |
2902 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
2903 | * @connector: drm connector | |
2904 | * @state: connector state object to release | |
2905 | * | |
2906 | * Default connector state destroy hook for drivers which don't have their own | |
2907 | * subclassed connector state structure. | |
2908 | */ | |
2909 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
2910 | struct drm_connector_state *state) | |
2911 | { | |
f5e7840b | 2912 | __drm_atomic_helper_connector_destroy_state(connector, state); |
d461701c DV |
2913 | kfree(state); |
2914 | } | |
2915 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); | |
5488dc16 LL |
2916 | |
2917 | /** | |
2918 | * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table | |
2919 | * @crtc: CRTC object | |
2920 | * @red: red correction table | |
2921 | * @green: green correction table | |
2922 | * @blue: green correction table | |
2923 | * @start: | |
2924 | * @size: size of the tables | |
2925 | * | |
2926 | * Implements support for legacy gamma correction table for drivers | |
2927 | * that support color management through the DEGAMMA_LUT/GAMMA_LUT | |
2928 | * properties. | |
2929 | */ | |
2930 | void drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc, | |
2931 | u16 *red, u16 *green, u16 *blue, | |
2932 | uint32_t start, uint32_t size) | |
2933 | { | |
2934 | struct drm_device *dev = crtc->dev; | |
2935 | struct drm_mode_config *config = &dev->mode_config; | |
2936 | struct drm_atomic_state *state; | |
2937 | struct drm_crtc_state *crtc_state; | |
2938 | struct drm_property_blob *blob = NULL; | |
2939 | struct drm_color_lut *blob_data; | |
2940 | int i, ret = 0; | |
2941 | ||
2942 | state = drm_atomic_state_alloc(crtc->dev); | |
2943 | if (!state) | |
2944 | return; | |
2945 | ||
2946 | blob = drm_property_create_blob(dev, | |
2947 | sizeof(struct drm_color_lut) * size, | |
2948 | NULL); | |
562c5b4d LL |
2949 | if (IS_ERR(blob)) { |
2950 | ret = PTR_ERR(blob); | |
c1f415c9 | 2951 | blob = NULL; |
5488dc16 LL |
2952 | goto fail; |
2953 | } | |
2954 | ||
2955 | /* Prepare GAMMA_LUT with the legacy values. */ | |
2956 | blob_data = (struct drm_color_lut *) blob->data; | |
2957 | for (i = 0; i < size; i++) { | |
2958 | blob_data[i].red = red[i]; | |
2959 | blob_data[i].green = green[i]; | |
2960 | blob_data[i].blue = blue[i]; | |
2961 | } | |
2962 | ||
2963 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
2964 | retry: | |
2965 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2966 | if (IS_ERR(crtc_state)) { | |
2967 | ret = PTR_ERR(crtc_state); | |
2968 | goto fail; | |
2969 | } | |
2970 | ||
2971 | /* Reset DEGAMMA_LUT and CTM properties. */ | |
2972 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
2973 | config->degamma_lut_property, 0); | |
2974 | if (ret) | |
2975 | goto fail; | |
2976 | ||
2977 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
2978 | config->ctm_property, 0); | |
2979 | if (ret) | |
2980 | goto fail; | |
2981 | ||
2982 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
2983 | config->gamma_lut_property, blob->base.id); | |
2984 | if (ret) | |
2985 | goto fail; | |
2986 | ||
2987 | ret = drm_atomic_commit(state); | |
2988 | if (ret) | |
2989 | goto fail; | |
2990 | ||
2991 | /* Driver takes ownership of state on successful commit. */ | |
2992 | ||
2993 | drm_property_unreference_blob(blob); | |
2994 | ||
2995 | return; | |
2996 | fail: | |
2997 | if (ret == -EDEADLK) | |
2998 | goto backoff; | |
2999 | ||
3000 | drm_atomic_state_free(state); | |
3001 | drm_property_unreference_blob(blob); | |
3002 | ||
3003 | return; | |
3004 | backoff: | |
3005 | drm_atomic_state_clear(state); | |
3006 | drm_atomic_legacy_backoff(state); | |
3007 | ||
3008 | goto retry; | |
3009 | } | |
3010 | EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set); |