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c2fcd274 DV |
1 | /* |
2 | * Copyright (C) 2014 Red Hat | |
3 | * Copyright (C) 2014 Intel Corp. | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a | |
6 | * copy of this software and associated documentation files (the "Software"), | |
7 | * to deal in the Software without restriction, including without limitation | |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | * and/or sell copies of the Software, and to permit persons to whom the | |
10 | * Software is furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
21 | * OTHER DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Rob Clark <robdclark@gmail.com> | |
25 | * Daniel Vetter <daniel.vetter@ffwll.ch> | |
26 | */ | |
27 | ||
28 | #include <drm/drmP.h> | |
29 | #include <drm/drm_atomic.h> | |
30 | #include <drm/drm_plane_helper.h> | |
31 | #include <drm/drm_crtc_helper.h> | |
623369e5 | 32 | #include <drm/drm_atomic_helper.h> |
f54d1867 | 33 | #include <linux/dma-fence.h> |
c2fcd274 | 34 | |
faf94a08 | 35 | #include "drm_crtc_helper_internal.h" |
44d1240d MS |
36 | #include "drm_crtc_internal.h" |
37 | ||
3150c7d0 DV |
38 | /** |
39 | * DOC: overview | |
40 | * | |
41 | * This helper library provides implementations of check and commit functions on | |
42 | * top of the CRTC modeset helper callbacks and the plane helper callbacks. It | |
43 | * also provides convenience implementations for the atomic state handling | |
44 | * callbacks for drivers which don't need to subclass the drm core structures to | |
45 | * add their own additional internal state. | |
46 | * | |
47 | * This library also provides default implementations for the check callback in | |
26196f7e DV |
48 | * drm_atomic_helper_check() and for the commit callback with |
49 | * drm_atomic_helper_commit(). But the individual stages and callbacks are | |
50 | * exposed to allow drivers to mix and match and e.g. use the plane helpers only | |
3150c7d0 DV |
51 | * together with a driver private modeset implementation. |
52 | * | |
53 | * This library also provides implementations for all the legacy driver | |
26196f7e DV |
54 | * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(), |
55 | * drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the | |
3150c7d0 DV |
56 | * various functions to implement set_property callbacks. New drivers must not |
57 | * implement these functions themselves but must use the provided helpers. | |
092d01da DV |
58 | * |
59 | * The atomic helper uses the same function table structures as all other | |
ea0dd85a DV |
60 | * modesetting helpers. See the documentation for &struct drm_crtc_helper_funcs, |
61 | * struct &drm_encoder_helper_funcs and &struct drm_connector_helper_funcs. It | |
62 | * also shares the &struct drm_plane_helper_funcs function table with the plane | |
092d01da | 63 | * helpers. |
3150c7d0 | 64 | */ |
c2fcd274 DV |
65 | static void |
66 | drm_atomic_helper_plane_changed(struct drm_atomic_state *state, | |
415c3ac3 | 67 | struct drm_plane_state *old_plane_state, |
c2fcd274 DV |
68 | struct drm_plane_state *plane_state, |
69 | struct drm_plane *plane) | |
70 | { | |
71 | struct drm_crtc_state *crtc_state; | |
72 | ||
415c3ac3 | 73 | if (old_plane_state->crtc) { |
b4d93679 ML |
74 | crtc_state = drm_atomic_get_new_crtc_state(state, |
75 | old_plane_state->crtc); | |
c2fcd274 DV |
76 | |
77 | if (WARN_ON(!crtc_state)) | |
78 | return; | |
79 | ||
80 | crtc_state->planes_changed = true; | |
81 | } | |
82 | ||
83 | if (plane_state->crtc) { | |
b4d93679 | 84 | crtc_state = drm_atomic_get_new_crtc_state(state, plane_state->crtc); |
c2fcd274 DV |
85 | |
86 | if (WARN_ON(!crtc_state)) | |
87 | return; | |
88 | ||
89 | crtc_state->planes_changed = true; | |
90 | } | |
91 | } | |
92 | ||
8248b65d ML |
93 | static int handle_conflicting_encoders(struct drm_atomic_state *state, |
94 | bool disable_conflicting_encoders) | |
97ac3204 | 95 | { |
415c3ac3 | 96 | struct drm_connector_state *new_conn_state; |
40616a26 | 97 | struct drm_connector *connector; |
c36a3254 | 98 | struct drm_connector_list_iter conn_iter; |
40616a26 ML |
99 | struct drm_encoder *encoder; |
100 | unsigned encoder_mask = 0; | |
c36a3254 | 101 | int i, ret = 0; |
97ac3204 | 102 | |
8248b65d ML |
103 | /* |
104 | * First loop, find all newly assigned encoders from the connectors | |
105 | * part of the state. If the same encoder is assigned to multiple | |
106 | * connectors bail out. | |
107 | */ | |
415c3ac3 | 108 | for_each_new_connector_in_state(state, connector, new_conn_state, i) { |
40616a26 ML |
109 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; |
110 | struct drm_encoder *new_encoder; | |
111 | ||
415c3ac3 | 112 | if (!new_conn_state->crtc) |
97ac3204 DV |
113 | continue; |
114 | ||
40616a26 | 115 | if (funcs->atomic_best_encoder) |
415c3ac3 | 116 | new_encoder = funcs->atomic_best_encoder(connector, new_conn_state); |
a0909cc5 | 117 | else if (funcs->best_encoder) |
40616a26 | 118 | new_encoder = funcs->best_encoder(connector); |
a0909cc5 BB |
119 | else |
120 | new_encoder = drm_atomic_helper_best_encoder(connector); | |
40616a26 | 121 | |
8248b65d ML |
122 | if (new_encoder) { |
123 | if (encoder_mask & (1 << drm_encoder_index(new_encoder))) { | |
124 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n", | |
125 | new_encoder->base.id, new_encoder->name, | |
126 | connector->base.id, connector->name); | |
127 | ||
128 | return -EINVAL; | |
129 | } | |
130 | ||
40616a26 | 131 | encoder_mask |= 1 << drm_encoder_index(new_encoder); |
8248b65d | 132 | } |
97ac3204 DV |
133 | } |
134 | ||
8248b65d ML |
135 | if (!encoder_mask) |
136 | return 0; | |
97ac3204 | 137 | |
8248b65d ML |
138 | /* |
139 | * Second loop, iterate over all connectors not part of the state. | |
140 | * | |
141 | * If a conflicting encoder is found and disable_conflicting_encoders | |
142 | * is not set, an error is returned. Userspace can provide a solution | |
143 | * through the atomic ioctl. | |
144 | * | |
145 | * If the flag is set conflicting connectors are removed from the crtc | |
146 | * and the crtc is disabled if no encoder is left. This preserves | |
147 | * compatibility with the legacy set_config behavior. | |
148 | */ | |
b982dab1 | 149 | drm_connector_list_iter_begin(state->dev, &conn_iter); |
c36a3254 | 150 | drm_for_each_connector_iter(connector, &conn_iter) { |
40616a26 | 151 | struct drm_crtc_state *crtc_state; |
623369e5 | 152 | |
b4d93679 | 153 | if (drm_atomic_get_new_connector_state(state, connector)) |
40616a26 | 154 | continue; |
623369e5 | 155 | |
40616a26 ML |
156 | encoder = connector->state->best_encoder; |
157 | if (!encoder || !(encoder_mask & (1 << drm_encoder_index(encoder)))) | |
623369e5 DV |
158 | continue; |
159 | ||
8248b65d ML |
160 | if (!disable_conflicting_encoders) { |
161 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n", | |
162 | encoder->base.id, encoder->name, | |
163 | connector->state->crtc->base.id, | |
164 | connector->state->crtc->name, | |
165 | connector->base.id, connector->name); | |
c36a3254 DV |
166 | ret = -EINVAL; |
167 | goto out; | |
8248b65d ML |
168 | } |
169 | ||
415c3ac3 ML |
170 | new_conn_state = drm_atomic_get_connector_state(state, connector); |
171 | if (IS_ERR(new_conn_state)) { | |
172 | ret = PTR_ERR(new_conn_state); | |
c36a3254 DV |
173 | goto out; |
174 | } | |
40616a26 ML |
175 | |
176 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n", | |
177 | encoder->base.id, encoder->name, | |
415c3ac3 | 178 | new_conn_state->crtc->base.id, new_conn_state->crtc->name, |
40616a26 ML |
179 | connector->base.id, connector->name); |
180 | ||
b4d93679 | 181 | crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); |
40616a26 | 182 | |
415c3ac3 | 183 | ret = drm_atomic_set_crtc_for_connector(new_conn_state, NULL); |
40616a26 | 184 | if (ret) |
c36a3254 | 185 | goto out; |
40616a26 ML |
186 | |
187 | if (!crtc_state->connector_mask) { | |
188 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, | |
189 | NULL); | |
190 | if (ret < 0) | |
c36a3254 | 191 | goto out; |
40616a26 ML |
192 | |
193 | crtc_state->active = false; | |
194 | } | |
623369e5 | 195 | } |
c36a3254 | 196 | out: |
b982dab1 | 197 | drm_connector_list_iter_end(&conn_iter); |
623369e5 | 198 | |
c36a3254 | 199 | return ret; |
623369e5 DV |
200 | } |
201 | ||
e87a52b3 ML |
202 | static void |
203 | set_best_encoder(struct drm_atomic_state *state, | |
204 | struct drm_connector_state *conn_state, | |
205 | struct drm_encoder *encoder) | |
206 | { | |
207 | struct drm_crtc_state *crtc_state; | |
208 | struct drm_crtc *crtc; | |
209 | ||
210 | if (conn_state->best_encoder) { | |
211 | /* Unset the encoder_mask in the old crtc state. */ | |
212 | crtc = conn_state->connector->state->crtc; | |
213 | ||
214 | /* A NULL crtc is an error here because we should have | |
215 | * duplicated a NULL best_encoder when crtc was NULL. | |
216 | * As an exception restoring duplicated atomic state | |
217 | * during resume is allowed, so don't warn when | |
218 | * best_encoder is equal to encoder we intend to set. | |
219 | */ | |
220 | WARN_ON(!crtc && encoder != conn_state->best_encoder); | |
221 | if (crtc) { | |
b4d93679 | 222 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); |
e87a52b3 ML |
223 | |
224 | crtc_state->encoder_mask &= | |
225 | ~(1 << drm_encoder_index(conn_state->best_encoder)); | |
226 | } | |
227 | } | |
228 | ||
229 | if (encoder) { | |
230 | crtc = conn_state->crtc; | |
231 | WARN_ON(!crtc); | |
232 | if (crtc) { | |
b4d93679 | 233 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); |
e87a52b3 ML |
234 | |
235 | crtc_state->encoder_mask |= | |
236 | 1 << drm_encoder_index(encoder); | |
237 | } | |
238 | } | |
239 | ||
240 | conn_state->best_encoder = encoder; | |
241 | } | |
242 | ||
ec5aaa58 | 243 | static void |
623369e5 | 244 | steal_encoder(struct drm_atomic_state *state, |
ff19b786 | 245 | struct drm_encoder *encoder) |
623369e5 | 246 | { |
623369e5 DV |
247 | struct drm_crtc_state *crtc_state; |
248 | struct drm_connector *connector; | |
415c3ac3 | 249 | struct drm_connector_state *old_connector_state, *new_connector_state; |
ec5aaa58 | 250 | int i; |
623369e5 | 251 | |
415c3ac3 | 252 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { |
ff19b786 | 253 | struct drm_crtc *encoder_crtc; |
623369e5 | 254 | |
415c3ac3 | 255 | if (new_connector_state->best_encoder != encoder) |
623369e5 DV |
256 | continue; |
257 | ||
415c3ac3 | 258 | encoder_crtc = old_connector_state->crtc; |
623369e5 | 259 | |
ff19b786 ML |
260 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n", |
261 | encoder->base.id, encoder->name, | |
262 | encoder_crtc->base.id, encoder_crtc->name); | |
e87a52b3 | 263 | |
415c3ac3 | 264 | set_best_encoder(state, new_connector_state, NULL); |
623369e5 | 265 | |
b4d93679 | 266 | crtc_state = drm_atomic_get_new_crtc_state(state, encoder_crtc); |
ff19b786 ML |
267 | crtc_state->connectors_changed = true; |
268 | ||
ec5aaa58 | 269 | return; |
623369e5 | 270 | } |
623369e5 DV |
271 | } |
272 | ||
273 | static int | |
9459545b ML |
274 | update_connector_routing(struct drm_atomic_state *state, |
275 | struct drm_connector *connector, | |
415c3ac3 ML |
276 | struct drm_connector_state *old_connector_state, |
277 | struct drm_connector_state *new_connector_state) | |
623369e5 | 278 | { |
b5ceff20 | 279 | const struct drm_connector_helper_funcs *funcs; |
623369e5 | 280 | struct drm_encoder *new_encoder; |
623369e5 | 281 | struct drm_crtc_state *crtc_state; |
623369e5 | 282 | |
17a38d9c DV |
283 | DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n", |
284 | connector->base.id, | |
285 | connector->name); | |
623369e5 | 286 | |
415c3ac3 ML |
287 | if (old_connector_state->crtc != new_connector_state->crtc) { |
288 | if (old_connector_state->crtc) { | |
b4d93679 | 289 | crtc_state = drm_atomic_get_new_crtc_state(state, old_connector_state->crtc); |
fc596660 | 290 | crtc_state->connectors_changed = true; |
623369e5 DV |
291 | } |
292 | ||
415c3ac3 | 293 | if (new_connector_state->crtc) { |
b4d93679 | 294 | crtc_state = drm_atomic_get_new_crtc_state(state, new_connector_state->crtc); |
fc596660 | 295 | crtc_state->connectors_changed = true; |
623369e5 DV |
296 | } |
297 | } | |
298 | ||
415c3ac3 | 299 | if (!new_connector_state->crtc) { |
17a38d9c | 300 | DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n", |
623369e5 DV |
301 | connector->base.id, |
302 | connector->name); | |
303 | ||
415c3ac3 | 304 | set_best_encoder(state, new_connector_state, NULL); |
623369e5 DV |
305 | |
306 | return 0; | |
307 | } | |
308 | ||
309 | funcs = connector->helper_private; | |
3b8a684b DV |
310 | |
311 | if (funcs->atomic_best_encoder) | |
312 | new_encoder = funcs->atomic_best_encoder(connector, | |
415c3ac3 | 313 | new_connector_state); |
c61b93fe | 314 | else if (funcs->best_encoder) |
3b8a684b | 315 | new_encoder = funcs->best_encoder(connector); |
c61b93fe BB |
316 | else |
317 | new_encoder = drm_atomic_helper_best_encoder(connector); | |
623369e5 DV |
318 | |
319 | if (!new_encoder) { | |
17a38d9c DV |
320 | DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", |
321 | connector->base.id, | |
322 | connector->name); | |
623369e5 DV |
323 | return -EINVAL; |
324 | } | |
325 | ||
415c3ac3 | 326 | if (!drm_encoder_crtc_ok(new_encoder, new_connector_state->crtc)) { |
6ac7c548 | 327 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d:%s]\n", |
5481c8fb DV |
328 | new_encoder->base.id, |
329 | new_encoder->name, | |
415c3ac3 ML |
330 | new_connector_state->crtc->base.id, |
331 | new_connector_state->crtc->name); | |
5481c8fb DV |
332 | return -EINVAL; |
333 | } | |
334 | ||
415c3ac3 ML |
335 | if (new_encoder == new_connector_state->best_encoder) { |
336 | set_best_encoder(state, new_connector_state, new_encoder); | |
e87a52b3 | 337 | |
fa3ab4c2 | 338 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n", |
17a38d9c DV |
339 | connector->base.id, |
340 | connector->name, | |
341 | new_encoder->base.id, | |
342 | new_encoder->name, | |
415c3ac3 ML |
343 | new_connector_state->crtc->base.id, |
344 | new_connector_state->crtc->name); | |
623369e5 DV |
345 | |
346 | return 0; | |
347 | } | |
348 | ||
ec5aaa58 | 349 | steal_encoder(state, new_encoder); |
6ea76f3c | 350 | |
415c3ac3 | 351 | set_best_encoder(state, new_connector_state, new_encoder); |
e87a52b3 | 352 | |
b4d93679 | 353 | crtc_state = drm_atomic_get_new_crtc_state(state, new_connector_state->crtc); |
fc596660 | 354 | crtc_state->connectors_changed = true; |
623369e5 | 355 | |
fa3ab4c2 | 356 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n", |
17a38d9c DV |
357 | connector->base.id, |
358 | connector->name, | |
359 | new_encoder->base.id, | |
360 | new_encoder->name, | |
415c3ac3 ML |
361 | new_connector_state->crtc->base.id, |
362 | new_connector_state->crtc->name); | |
623369e5 DV |
363 | |
364 | return 0; | |
365 | } | |
366 | ||
367 | static int | |
368 | mode_fixup(struct drm_atomic_state *state) | |
369 | { | |
df63b999 | 370 | struct drm_crtc *crtc; |
415c3ac3 | 371 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 372 | struct drm_connector *connector; |
415c3ac3 | 373 | struct drm_connector_state *new_conn_state; |
623369e5 | 374 | int i; |
f9ad86e4 | 375 | int ret; |
623369e5 | 376 | |
415c3ac3 ML |
377 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
378 | if (!new_crtc_state->mode_changed && | |
379 | !new_crtc_state->connectors_changed) | |
623369e5 DV |
380 | continue; |
381 | ||
415c3ac3 | 382 | drm_mode_copy(&new_crtc_state->adjusted_mode, &new_crtc_state->mode); |
623369e5 DV |
383 | } |
384 | ||
415c3ac3 | 385 | for_each_new_connector_in_state(state, connector, new_conn_state, i) { |
b5ceff20 | 386 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
387 | struct drm_encoder *encoder; |
388 | ||
415c3ac3 | 389 | WARN_ON(!!new_conn_state->best_encoder != !!new_conn_state->crtc); |
623369e5 | 390 | |
415c3ac3 | 391 | if (!new_conn_state->crtc || !new_conn_state->best_encoder) |
623369e5 DV |
392 | continue; |
393 | ||
415c3ac3 | 394 | new_crtc_state = |
b4d93679 | 395 | drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); |
623369e5 DV |
396 | |
397 | /* | |
398 | * Each encoder has at most one connector (since we always steal | |
399 | * it away), so we won't call ->mode_fixup twice. | |
400 | */ | |
415c3ac3 | 401 | encoder = new_conn_state->best_encoder; |
623369e5 DV |
402 | funcs = encoder->helper_private; |
403 | ||
415c3ac3 ML |
404 | ret = drm_bridge_mode_fixup(encoder->bridge, &new_crtc_state->mode, |
405 | &new_crtc_state->adjusted_mode); | |
862e686c AT |
406 | if (!ret) { |
407 | DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); | |
408 | return -EINVAL; | |
623369e5 DV |
409 | } |
410 | ||
2827635e | 411 | if (funcs && funcs->atomic_check) { |
415c3ac3 ML |
412 | ret = funcs->atomic_check(encoder, new_crtc_state, |
413 | new_conn_state); | |
4cd4df80 | 414 | if (ret) { |
17a38d9c DV |
415 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", |
416 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
417 | return ret; |
418 | } | |
2827635e | 419 | } else if (funcs && funcs->mode_fixup) { |
415c3ac3 ML |
420 | ret = funcs->mode_fixup(encoder, &new_crtc_state->mode, |
421 | &new_crtc_state->adjusted_mode); | |
4cd4df80 | 422 | if (!ret) { |
17a38d9c DV |
423 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", |
424 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
425 | return -EINVAL; |
426 | } | |
623369e5 DV |
427 | } |
428 | } | |
429 | ||
415c3ac3 | 430 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
b5ceff20 | 431 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 432 | |
415c3ac3 | 433 | if (!new_crtc_state->enable) |
f55f1701 LY |
434 | continue; |
435 | ||
415c3ac3 ML |
436 | if (!new_crtc_state->mode_changed && |
437 | !new_crtc_state->connectors_changed) | |
623369e5 DV |
438 | continue; |
439 | ||
440 | funcs = crtc->helper_private; | |
840bfe95 ACO |
441 | if (!funcs->mode_fixup) |
442 | continue; | |
443 | ||
415c3ac3 ML |
444 | ret = funcs->mode_fixup(crtc, &new_crtc_state->mode, |
445 | &new_crtc_state->adjusted_mode); | |
623369e5 | 446 | if (!ret) { |
fa3ab4c2 VS |
447 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n", |
448 | crtc->base.id, crtc->name); | |
623369e5 DV |
449 | return -EINVAL; |
450 | } | |
451 | } | |
452 | ||
453 | return 0; | |
454 | } | |
455 | ||
faf94a08 JA |
456 | static enum drm_mode_status mode_valid_path(struct drm_connector *connector, |
457 | struct drm_encoder *encoder, | |
458 | struct drm_crtc *crtc, | |
459 | struct drm_display_mode *mode) | |
460 | { | |
461 | enum drm_mode_status ret; | |
462 | ||
463 | ret = drm_encoder_mode_valid(encoder, mode); | |
464 | if (ret != MODE_OK) { | |
465 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] mode_valid() failed\n", | |
466 | encoder->base.id, encoder->name); | |
467 | return ret; | |
468 | } | |
469 | ||
470 | ret = drm_bridge_mode_valid(encoder->bridge, mode); | |
471 | if (ret != MODE_OK) { | |
472 | DRM_DEBUG_ATOMIC("[BRIDGE] mode_valid() failed\n"); | |
473 | return ret; | |
474 | } | |
475 | ||
476 | ret = drm_crtc_mode_valid(crtc, mode); | |
477 | if (ret != MODE_OK) { | |
478 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode_valid() failed\n", | |
479 | crtc->base.id, crtc->name); | |
480 | return ret; | |
481 | } | |
482 | ||
483 | return ret; | |
484 | } | |
485 | ||
486 | static int | |
487 | mode_valid(struct drm_atomic_state *state) | |
488 | { | |
489 | struct drm_connector_state *conn_state; | |
490 | struct drm_connector *connector; | |
491 | int i; | |
492 | ||
493 | for_each_new_connector_in_state(state, connector, conn_state, i) { | |
494 | struct drm_encoder *encoder = conn_state->best_encoder; | |
495 | struct drm_crtc *crtc = conn_state->crtc; | |
496 | struct drm_crtc_state *crtc_state; | |
497 | enum drm_mode_status mode_status; | |
498 | struct drm_display_mode *mode; | |
499 | ||
500 | if (!crtc || !encoder) | |
501 | continue; | |
502 | ||
503 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); | |
504 | if (!crtc_state) | |
505 | continue; | |
506 | if (!crtc_state->mode_changed && !crtc_state->connectors_changed) | |
507 | continue; | |
508 | ||
509 | mode = &crtc_state->mode; | |
510 | ||
511 | mode_status = mode_valid_path(connector, encoder, crtc, mode); | |
512 | if (mode_status != MODE_OK) | |
513 | return -EINVAL; | |
514 | } | |
515 | ||
516 | return 0; | |
517 | } | |
518 | ||
d9b13620 | 519 | /** |
f98bd3ef | 520 | * drm_atomic_helper_check_modeset - validate state object for modeset changes |
d9b13620 DV |
521 | * @dev: DRM device |
522 | * @state: the driver state object | |
523 | * | |
524 | * Check the state object to see if the requested state is physically possible. | |
525 | * This does all the crtc and connector related computations for an atomic | |
ce09d766 ML |
526 | * update and adds any additional connectors needed for full modesets. It calls |
527 | * the various per-object callbacks in the follow order: | |
528 | * | |
529 | * 1. &drm_connector_helper_funcs.atomic_best_encoder for determining the new encoder. | |
530 | * 2. &drm_connector_helper_funcs.atomic_check to validate the connector state. | |
531 | * 3. If it's determined a modeset is needed then all connectors on the affected crtc | |
532 | * crtc are added and &drm_connector_helper_funcs.atomic_check is run on them. | |
faf94a08 JA |
533 | * 4. &drm_encoder_helper_funcs.mode_valid, &drm_bridge_funcs.mode_valid and |
534 | * &drm_crtc_helper_funcs.mode_valid are called on the affected components. | |
535 | * 5. &drm_bridge_funcs.mode_fixup is called on all encoder bridges. | |
536 | * 6. &drm_encoder_helper_funcs.atomic_check is called to validate any encoder state. | |
ce09d766 ML |
537 | * This function is only called when the encoder will be part of a configured crtc, |
538 | * it must not be used for implementing connector property validation. | |
539 | * If this function is NULL, &drm_atomic_encoder_helper_funcs.mode_fixup is called | |
540 | * instead. | |
faf94a08 | 541 | * 7. &drm_crtc_helper_funcs.mode_fixup is called last, to fix up the mode with crtc constraints. |
6806cdf9 DV |
542 | * |
543 | * &drm_crtc_state.mode_changed is set when the input mode is changed. | |
544 | * &drm_crtc_state.connectors_changed is set when a connector is added or | |
545 | * removed from the crtc. &drm_crtc_state.active_changed is set when | |
546 | * &drm_crtc_state.active changes, which is used for DPMS. | |
d807ed1c | 547 | * See also: drm_atomic_crtc_needs_modeset() |
d9b13620 DV |
548 | * |
549 | * IMPORTANT: | |
550 | * | |
6806cdf9 DV |
551 | * Drivers which set &drm_crtc_state.mode_changed (e.g. in their |
552 | * &drm_plane_helper_funcs.atomic_check hooks if a plane update can't be done | |
553 | * without a full modeset) _must_ call this function afterwards after that | |
554 | * change. It is permitted to call this function multiple times for the same | |
555 | * update, e.g. when the &drm_crtc_helper_funcs.atomic_check functions depend | |
556 | * upon the adjusted dotclock for fifo space allocation and watermark | |
557 | * computation. | |
d9b13620 | 558 | * |
c39032a8 | 559 | * RETURNS: |
d9b13620 DV |
560 | * Zero for success or -errno |
561 | */ | |
562 | int | |
934ce1c2 | 563 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
564 | struct drm_atomic_state *state) |
565 | { | |
623369e5 | 566 | struct drm_crtc *crtc; |
415c3ac3 | 567 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
df63b999 | 568 | struct drm_connector *connector; |
415c3ac3 | 569 | struct drm_connector_state *old_connector_state, *new_connector_state; |
623369e5 | 570 | int i, ret; |
ce09d766 | 571 | unsigned connectors_mask = 0; |
623369e5 | 572 | |
415c3ac3 | 573 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
970ece83 ML |
574 | bool has_connectors = |
575 | !!new_crtc_state->connector_mask; | |
576 | ||
869e188a DV |
577 | WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); |
578 | ||
415c3ac3 | 579 | if (!drm_mode_equal(&old_crtc_state->mode, &new_crtc_state->mode)) { |
fa3ab4c2 VS |
580 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n", |
581 | crtc->base.id, crtc->name); | |
415c3ac3 | 582 | new_crtc_state->mode_changed = true; |
623369e5 DV |
583 | } |
584 | ||
415c3ac3 | 585 | if (old_crtc_state->enable != new_crtc_state->enable) { |
fa3ab4c2 VS |
586 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n", |
587 | crtc->base.id, crtc->name); | |
fc596660 ML |
588 | |
589 | /* | |
590 | * For clarity this assignment is done here, but | |
591 | * enable == 0 is only true when there are no | |
592 | * connectors and a NULL mode. | |
593 | * | |
594 | * The other way around is true as well. enable != 0 | |
595 | * iff connectors are attached and a mode is set. | |
596 | */ | |
415c3ac3 ML |
597 | new_crtc_state->mode_changed = true; |
598 | new_crtc_state->connectors_changed = true; | |
623369e5 | 599 | } |
24d6652c ML |
600 | |
601 | if (old_crtc_state->active != new_crtc_state->active) { | |
602 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", | |
603 | crtc->base.id, crtc->name); | |
604 | new_crtc_state->active_changed = true; | |
605 | } | |
970ece83 ML |
606 | |
607 | if (new_crtc_state->enable != has_connectors) { | |
608 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", | |
609 | crtc->base.id, crtc->name); | |
610 | ||
611 | return -EINVAL; | |
612 | } | |
623369e5 DV |
613 | } |
614 | ||
44596b8c | 615 | ret = handle_conflicting_encoders(state, false); |
8248b65d ML |
616 | if (ret) |
617 | return ret; | |
40616a26 | 618 | |
415c3ac3 | 619 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { |
ce09d766 ML |
620 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; |
621 | ||
869e188a DV |
622 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); |
623 | ||
623369e5 | 624 | /* |
d807ed1c BS |
625 | * This only sets crtc->connectors_changed for routing changes, |
626 | * drivers must set crtc->connectors_changed themselves when | |
627 | * connector properties need to be updated. | |
623369e5 | 628 | */ |
9459545b | 629 | ret = update_connector_routing(state, connector, |
415c3ac3 ML |
630 | old_connector_state, |
631 | new_connector_state); | |
623369e5 DV |
632 | if (ret) |
633 | return ret; | |
415c3ac3 | 634 | if (old_connector_state->crtc) { |
b4d93679 ML |
635 | new_crtc_state = drm_atomic_get_new_crtc_state(state, |
636 | old_connector_state->crtc); | |
415c3ac3 ML |
637 | if (old_connector_state->link_status != |
638 | new_connector_state->link_status) | |
639 | new_crtc_state->connectors_changed = true; | |
40ee6fbe | 640 | } |
ce09d766 ML |
641 | |
642 | if (funcs->atomic_check) | |
643 | ret = funcs->atomic_check(connector, new_connector_state); | |
644 | if (ret) | |
645 | return ret; | |
646 | ||
647 | connectors_mask += BIT(i); | |
623369e5 DV |
648 | } |
649 | ||
650 | /* | |
651 | * After all the routing has been prepared we need to add in any | |
652 | * connector which is itself unchanged, but who's crtc changes it's | |
653 | * configuration. This must be done before calling mode_fixup in case a | |
654 | * crtc only changed its mode but has the same set of connectors. | |
655 | */ | |
415c3ac3 | 656 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
415c3ac3 | 657 | if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) |
623369e5 DV |
658 | continue; |
659 | ||
fa3ab4c2 VS |
660 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n", |
661 | crtc->base.id, crtc->name, | |
415c3ac3 ML |
662 | new_crtc_state->enable ? 'y' : 'n', |
663 | new_crtc_state->active ? 'y' : 'n'); | |
623369e5 DV |
664 | |
665 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
666 | if (ret != 0) | |
667 | return ret; | |
668 | ||
57744aa7 ML |
669 | ret = drm_atomic_add_affected_planes(state, crtc); |
670 | if (ret != 0) | |
671 | return ret; | |
623369e5 DV |
672 | } |
673 | ||
ce09d766 ML |
674 | /* |
675 | * Iterate over all connectors again, to make sure atomic_check() | |
676 | * has been called on them when a modeset is forced. | |
677 | */ | |
678 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { | |
679 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; | |
680 | ||
681 | if (connectors_mask & BIT(i)) | |
682 | continue; | |
683 | ||
684 | if (funcs->atomic_check) | |
685 | ret = funcs->atomic_check(connector, new_connector_state); | |
686 | if (ret) | |
687 | return ret; | |
688 | } | |
689 | ||
faf94a08 JA |
690 | ret = mode_valid(state); |
691 | if (ret) | |
692 | return ret; | |
693 | ||
623369e5 DV |
694 | return mode_fixup(state); |
695 | } | |
d9b13620 | 696 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 697 | |
c2fcd274 | 698 | /** |
f98bd3ef | 699 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
700 | * @dev: DRM device |
701 | * @state: the driver state object | |
702 | * | |
703 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 | 704 | * This does all the plane update related checks using by calling into the |
6806cdf9 DV |
705 | * &drm_crtc_helper_funcs.atomic_check and &drm_plane_helper_funcs.atomic_check |
706 | * hooks provided by the driver. | |
c2fcd274 | 707 | * |
6806cdf9 | 708 | * It also sets &drm_crtc_state.planes_changed to indicate that a crtc has |
fc596660 ML |
709 | * updated planes. |
710 | * | |
c39032a8 | 711 | * RETURNS: |
c2fcd274 DV |
712 | * Zero for success or -errno |
713 | */ | |
d9b13620 DV |
714 | int |
715 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
716 | struct drm_atomic_state *state) | |
c2fcd274 | 717 | { |
df63b999 | 718 | struct drm_crtc *crtc; |
415c3ac3 | 719 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 720 | struct drm_plane *plane; |
415c3ac3 | 721 | struct drm_plane_state *new_plane_state, *old_plane_state; |
c2fcd274 DV |
722 | int i, ret = 0; |
723 | ||
415c3ac3 | 724 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { |
b5ceff20 | 725 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 726 | |
869e188a DV |
727 | WARN_ON(!drm_modeset_is_locked(&plane->mutex)); |
728 | ||
c2fcd274 DV |
729 | funcs = plane->helper_private; |
730 | ||
415c3ac3 | 731 | drm_atomic_helper_plane_changed(state, old_plane_state, new_plane_state, plane); |
c2fcd274 DV |
732 | |
733 | if (!funcs || !funcs->atomic_check) | |
734 | continue; | |
735 | ||
415c3ac3 | 736 | ret = funcs->atomic_check(plane, new_plane_state); |
c2fcd274 | 737 | if (ret) { |
9f4c97a2 VS |
738 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n", |
739 | plane->base.id, plane->name); | |
c2fcd274 DV |
740 | return ret; |
741 | } | |
742 | } | |
743 | ||
415c3ac3 | 744 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
b5ceff20 | 745 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
746 | |
747 | funcs = crtc->helper_private; | |
748 | ||
749 | if (!funcs || !funcs->atomic_check) | |
750 | continue; | |
751 | ||
415c3ac3 | 752 | ret = funcs->atomic_check(crtc, new_crtc_state); |
c2fcd274 | 753 | if (ret) { |
fa3ab4c2 VS |
754 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n", |
755 | crtc->base.id, crtc->name); | |
c2fcd274 DV |
756 | return ret; |
757 | } | |
758 | } | |
759 | ||
d9b13620 DV |
760 | return ret; |
761 | } | |
762 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
763 | ||
764 | /** | |
765 | * drm_atomic_helper_check - validate state object | |
766 | * @dev: DRM device | |
767 | * @state: the driver state object | |
768 | * | |
769 | * Check the state object to see if the requested state is physically possible. | |
770 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
771 | * checking that a driver needs it can simply wrap that around this function. | |
6806cdf9 DV |
772 | * Drivers without such needs can directly use this as their |
773 | * &drm_mode_config_funcs.atomic_check callback. | |
d9b13620 | 774 | * |
b4274fbe DV |
775 | * This just wraps the two parts of the state checking for planes and modeset |
776 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
777 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
6806cdf9 DV |
778 | * @drm_plane_helper_funcs.atomic_check and @drm_crtc_helper_funcs.atomic_check |
779 | * functions depend upon an updated adjusted_mode.clock to e.g. properly compute | |
780 | * watermarks. | |
b4274fbe | 781 | * |
c39032a8 | 782 | * RETURNS: |
d9b13620 DV |
783 | * Zero for success or -errno |
784 | */ | |
785 | int drm_atomic_helper_check(struct drm_device *dev, | |
786 | struct drm_atomic_state *state) | |
787 | { | |
788 | int ret; | |
789 | ||
b4274fbe | 790 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
791 | if (ret) |
792 | return ret; | |
793 | ||
b4274fbe | 794 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
795 | if (ret) |
796 | return ret; | |
797 | ||
c2fcd274 DV |
798 | return ret; |
799 | } | |
800 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
801 | ||
623369e5 DV |
802 | static void |
803 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
804 | { | |
df63b999 | 805 | struct drm_connector *connector; |
415c3ac3 | 806 | struct drm_connector_state *old_conn_state, *new_conn_state; |
df63b999 | 807 | struct drm_crtc *crtc; |
415c3ac3 | 808 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
623369e5 DV |
809 | int i; |
810 | ||
415c3ac3 | 811 | for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) { |
b5ceff20 | 812 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
813 | struct drm_encoder *encoder; |
814 | ||
623369e5 DV |
815 | /* Shut down everything that's in the changeset and currently |
816 | * still on. So need to check the old, saved state. */ | |
df63b999 | 817 | if (!old_conn_state->crtc) |
623369e5 DV |
818 | continue; |
819 | ||
b4d93679 | 820 | old_crtc_state = drm_atomic_get_old_crtc_state(old_state, old_conn_state->crtc); |
eab3bbef | 821 | |
4218a32f | 822 | if (!old_crtc_state->active || |
2465ff62 | 823 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) |
eab3bbef DV |
824 | continue; |
825 | ||
46df9adb | 826 | encoder = old_conn_state->best_encoder; |
623369e5 | 827 | |
46df9adb RC |
828 | /* We shouldn't get this far if we didn't previously have |
829 | * an encoder.. but WARN_ON() rather than explode. | |
830 | */ | |
831 | if (WARN_ON(!encoder)) | |
623369e5 DV |
832 | continue; |
833 | ||
834 | funcs = encoder->helper_private; | |
835 | ||
17a38d9c DV |
836 | DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
837 | encoder->base.id, encoder->name); | |
95d6eb3b | 838 | |
623369e5 DV |
839 | /* |
840 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 841 | * it away), so we won't call disable hooks twice. |
623369e5 | 842 | */ |
862e686c | 843 | drm_bridge_disable(encoder->bridge); |
623369e5 DV |
844 | |
845 | /* Right function depends upon target state. */ | |
2827635e | 846 | if (funcs) { |
415c3ac3 | 847 | if (new_conn_state->crtc && funcs->prepare) |
2827635e NT |
848 | funcs->prepare(encoder); |
849 | else if (funcs->disable) | |
850 | funcs->disable(encoder); | |
851 | else if (funcs->dpms) | |
852 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
853 | } | |
623369e5 | 854 | |
862e686c | 855 | drm_bridge_post_disable(encoder->bridge); |
623369e5 DV |
856 | } |
857 | ||
415c3ac3 | 858 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
b5ceff20 | 859 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
860 | |
861 | /* Shut down everything that needs a full modeset. */ | |
415c3ac3 | 862 | if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) |
eab3bbef DV |
863 | continue; |
864 | ||
865 | if (!old_crtc_state->active) | |
623369e5 DV |
866 | continue; |
867 | ||
868 | funcs = crtc->helper_private; | |
869 | ||
fa3ab4c2 VS |
870 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n", |
871 | crtc->base.id, crtc->name); | |
95d6eb3b DV |
872 | |
873 | ||
623369e5 | 874 | /* Right function depends upon target state. */ |
415c3ac3 | 875 | if (new_crtc_state->enable && funcs->prepare) |
623369e5 | 876 | funcs->prepare(crtc); |
c9ac8b4c LY |
877 | else if (funcs->atomic_disable) |
878 | funcs->atomic_disable(crtc, old_crtc_state); | |
623369e5 DV |
879 | else if (funcs->disable) |
880 | funcs->disable(crtc); | |
881 | else | |
882 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); | |
883 | } | |
884 | } | |
885 | ||
4c18d301 DV |
886 | /** |
887 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state | |
888 | * @dev: DRM device | |
889 | * @old_state: atomic state object with old state structures | |
890 | * | |
891 | * This function updates all the various legacy modeset state pointers in | |
892 | * connectors, encoders and crtcs. It also updates the timestamping constants | |
893 | * used for precise vblank timestamps by calling | |
894 | * drm_calc_timestamping_constants(). | |
895 | * | |
896 | * Drivers can use this for building their own atomic commit if they don't have | |
897 | * a pure helper-based modeset implementation. | |
898 | */ | |
899 | void | |
900 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, | |
901 | struct drm_atomic_state *old_state) | |
623369e5 | 902 | { |
df63b999 | 903 | struct drm_connector *connector; |
415c3ac3 | 904 | struct drm_connector_state *old_conn_state, *new_conn_state; |
df63b999 | 905 | struct drm_crtc *crtc; |
415c3ac3 | 906 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
907 | int i; |
908 | ||
8c10342c | 909 | /* clear out existing links and update dpms */ |
415c3ac3 | 910 | for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) { |
8c10342c ML |
911 | if (connector->encoder) { |
912 | WARN_ON(!connector->encoder->crtc); | |
913 | ||
914 | connector->encoder->crtc = NULL; | |
915 | connector->encoder = NULL; | |
916 | } | |
623369e5 | 917 | |
415c3ac3 | 918 | crtc = new_conn_state->crtc; |
8c10342c ML |
919 | if ((!crtc && old_conn_state->crtc) || |
920 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { | |
921 | struct drm_property *dpms_prop = | |
922 | dev->mode_config.dpms_property; | |
923 | int mode = DRM_MODE_DPMS_OFF; | |
623369e5 | 924 | |
8c10342c ML |
925 | if (crtc && crtc->state->active) |
926 | mode = DRM_MODE_DPMS_ON; | |
927 | ||
928 | connector->dpms = mode; | |
929 | drm_object_property_set_value(&connector->base, | |
930 | dpms_prop, mode); | |
931 | } | |
623369e5 DV |
932 | } |
933 | ||
934 | /* set new links */ | |
415c3ac3 ML |
935 | for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { |
936 | if (!new_conn_state->crtc) | |
623369e5 DV |
937 | continue; |
938 | ||
415c3ac3 | 939 | if (WARN_ON(!new_conn_state->best_encoder)) |
623369e5 DV |
940 | continue; |
941 | ||
415c3ac3 ML |
942 | connector->encoder = new_conn_state->best_encoder; |
943 | connector->encoder->crtc = new_conn_state->crtc; | |
623369e5 DV |
944 | } |
945 | ||
946 | /* set legacy state in the crtc structure */ | |
415c3ac3 | 947 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { |
2660801f | 948 | struct drm_plane *primary = crtc->primary; |
b4d93679 | 949 | struct drm_plane_state *new_plane_state; |
2660801f | 950 | |
415c3ac3 ML |
951 | crtc->mode = new_crtc_state->mode; |
952 | crtc->enabled = new_crtc_state->enable; | |
2660801f | 953 | |
b4d93679 ML |
954 | new_plane_state = |
955 | drm_atomic_get_new_plane_state(old_state, primary); | |
956 | ||
957 | if (new_plane_state && new_plane_state->crtc == crtc) { | |
958 | crtc->x = new_plane_state->src_x >> 16; | |
959 | crtc->y = new_plane_state->src_y >> 16; | |
2660801f | 960 | } |
3d51d2d2 | 961 | |
415c3ac3 | 962 | if (new_crtc_state->enable) |
3d51d2d2 | 963 | drm_calc_timestamping_constants(crtc, |
415c3ac3 | 964 | &new_crtc_state->adjusted_mode); |
623369e5 DV |
965 | } |
966 | } | |
4c18d301 | 967 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); |
623369e5 DV |
968 | |
969 | static void | |
970 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
971 | { | |
df63b999 | 972 | struct drm_crtc *crtc; |
415c3ac3 | 973 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 974 | struct drm_connector *connector; |
415c3ac3 | 975 | struct drm_connector_state *new_conn_state; |
623369e5 DV |
976 | int i; |
977 | ||
415c3ac3 | 978 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { |
b5ceff20 | 979 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 980 | |
415c3ac3 | 981 | if (!new_crtc_state->mode_changed) |
623369e5 DV |
982 | continue; |
983 | ||
984 | funcs = crtc->helper_private; | |
985 | ||
415c3ac3 | 986 | if (new_crtc_state->enable && funcs->mode_set_nofb) { |
fa3ab4c2 VS |
987 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n", |
988 | crtc->base.id, crtc->name); | |
95d6eb3b | 989 | |
623369e5 | 990 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 991 | } |
623369e5 DV |
992 | } |
993 | ||
415c3ac3 | 994 | for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { |
b5ceff20 | 995 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
996 | struct drm_encoder *encoder; |
997 | struct drm_display_mode *mode, *adjusted_mode; | |
998 | ||
415c3ac3 | 999 | if (!new_conn_state->best_encoder) |
623369e5 DV |
1000 | continue; |
1001 | ||
415c3ac3 | 1002 | encoder = new_conn_state->best_encoder; |
623369e5 | 1003 | funcs = encoder->helper_private; |
415c3ac3 | 1004 | new_crtc_state = new_conn_state->crtc->state; |
623369e5 DV |
1005 | mode = &new_crtc_state->mode; |
1006 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
1007 | ||
eab3bbef DV |
1008 | if (!new_crtc_state->mode_changed) |
1009 | continue; | |
1010 | ||
17a38d9c DV |
1011 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
1012 | encoder->base.id, encoder->name); | |
95d6eb3b | 1013 | |
623369e5 DV |
1014 | /* |
1015 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 1016 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 1017 | */ |
fe4a11c9 PZ |
1018 | if (funcs && funcs->atomic_mode_set) { |
1019 | funcs->atomic_mode_set(encoder, new_crtc_state, | |
415c3ac3 | 1020 | new_conn_state); |
fe4a11c9 | 1021 | } else if (funcs && funcs->mode_set) { |
c982bd90 | 1022 | funcs->mode_set(encoder, mode, adjusted_mode); |
fe4a11c9 | 1023 | } |
623369e5 | 1024 | |
862e686c | 1025 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
623369e5 DV |
1026 | } |
1027 | } | |
1028 | ||
1029 | /** | |
1af434a9 | 1030 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 1031 | * @dev: DRM device |
a072f809 | 1032 | * @old_state: atomic state object with old state structures |
623369e5 | 1033 | * |
1af434a9 | 1034 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 1035 | * prepares them (if required) with the new mode. |
1af434a9 | 1036 | * |
60acc4eb | 1037 | * For compatibility with legacy crtc helpers this should be called before |
1af434a9 DV |
1038 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
1039 | * does. But drivers with different needs can group the modeset commits together | |
1040 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
1041 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 1042 | */ |
1af434a9 DV |
1043 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
1044 | struct drm_atomic_state *old_state) | |
623369e5 | 1045 | { |
a072f809 | 1046 | disable_outputs(dev, old_state); |
4c18d301 DV |
1047 | |
1048 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); | |
1049 | ||
a072f809 | 1050 | crtc_set_mode(dev, old_state); |
623369e5 | 1051 | } |
1af434a9 | 1052 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 DV |
1053 | |
1054 | /** | |
1af434a9 | 1055 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
1056 | * @dev: DRM device |
1057 | * @old_state: atomic state object with old state structures | |
1058 | * | |
1af434a9 DV |
1059 | * This function enables all the outputs with the new configuration which had to |
1060 | * be turned off for the update. | |
1061 | * | |
60acc4eb | 1062 | * For compatibility with legacy crtc helpers this should be called after |
1af434a9 DV |
1063 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
1064 | * does. But drivers with different needs can group the modeset commits together | |
1065 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
1066 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 1067 | */ |
1af434a9 DV |
1068 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
1069 | struct drm_atomic_state *old_state) | |
623369e5 | 1070 | { |
df63b999 | 1071 | struct drm_crtc *crtc; |
415c3ac3 | 1072 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 1073 | struct drm_connector *connector; |
415c3ac3 | 1074 | struct drm_connector_state *new_conn_state; |
623369e5 DV |
1075 | int i; |
1076 | ||
415c3ac3 | 1077 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { |
b5ceff20 | 1078 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
1079 | |
1080 | /* Need to filter out CRTCs where only planes change. */ | |
415c3ac3 | 1081 | if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) |
eab3bbef DV |
1082 | continue; |
1083 | ||
415c3ac3 | 1084 | if (!new_crtc_state->active) |
623369e5 DV |
1085 | continue; |
1086 | ||
1087 | funcs = crtc->helper_private; | |
1088 | ||
415c3ac3 | 1089 | if (new_crtc_state->enable) { |
fa3ab4c2 VS |
1090 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n", |
1091 | crtc->base.id, crtc->name); | |
95d6eb3b | 1092 | |
ee0a89cf DV |
1093 | if (funcs->enable) |
1094 | funcs->enable(crtc); | |
1095 | else | |
1096 | funcs->commit(crtc); | |
1097 | } | |
623369e5 DV |
1098 | } |
1099 | ||
415c3ac3 | 1100 | for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { |
b5ceff20 | 1101 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
1102 | struct drm_encoder *encoder; |
1103 | ||
415c3ac3 | 1104 | if (!new_conn_state->best_encoder) |
623369e5 DV |
1105 | continue; |
1106 | ||
415c3ac3 ML |
1107 | if (!new_conn_state->crtc->state->active || |
1108 | !drm_atomic_crtc_needs_modeset(new_conn_state->crtc->state)) | |
eab3bbef DV |
1109 | continue; |
1110 | ||
415c3ac3 | 1111 | encoder = new_conn_state->best_encoder; |
623369e5 DV |
1112 | funcs = encoder->helper_private; |
1113 | ||
17a38d9c DV |
1114 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
1115 | encoder->base.id, encoder->name); | |
95d6eb3b | 1116 | |
623369e5 DV |
1117 | /* |
1118 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 1119 | * it away), so we won't call enable hooks twice. |
623369e5 | 1120 | */ |
862e686c | 1121 | drm_bridge_pre_enable(encoder->bridge); |
623369e5 | 1122 | |
2827635e NT |
1123 | if (funcs) { |
1124 | if (funcs->enable) | |
1125 | funcs->enable(encoder); | |
1126 | else if (funcs->commit) | |
1127 | funcs->commit(encoder); | |
1128 | } | |
623369e5 | 1129 | |
862e686c | 1130 | drm_bridge_enable(encoder->bridge); |
623369e5 DV |
1131 | } |
1132 | } | |
1af434a9 | 1133 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 1134 | |
4c5b7f3a RC |
1135 | /** |
1136 | * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state | |
1137 | * @dev: DRM device | |
1138 | * @state: atomic state object with old state structures | |
1ea0c02e DV |
1139 | * @pre_swap: If true, do an interruptible wait, and @state is the new state. |
1140 | * Otherwise @state is the old state. | |
4c5b7f3a RC |
1141 | * |
1142 | * For implicit sync, driver should fish the exclusive fence out from the | |
1143 | * incoming fb's and stash it in the drm_plane_state. This is called after | |
1144 | * drm_atomic_helper_swap_state() so it uses the current plane state (and | |
1145 | * just uses the atomic state to find the changed planes) | |
f6ce410a | 1146 | * |
1ea0c02e DV |
1147 | * Note that @pre_swap is needed since the point where we block for fences moves |
1148 | * around depending upon whether an atomic commit is blocking or | |
42590372 GP |
1149 | * non-blocking. For non-blocking commit all waiting needs to happen after |
1150 | * drm_atomic_helper_swap_state() is called, but for blocking commits we want | |
1ea0c02e DV |
1151 | * to wait **before** we do anything that can't be easily rolled back. That is |
1152 | * before we call drm_atomic_helper_swap_state(). | |
1153 | * | |
f54d1867 | 1154 | * Returns zero if success or < 0 if dma_fence_wait() fails. |
4c5b7f3a | 1155 | */ |
f6ce410a GP |
1156 | int drm_atomic_helper_wait_for_fences(struct drm_device *dev, |
1157 | struct drm_atomic_state *state, | |
1158 | bool pre_swap) | |
e2330f07 | 1159 | { |
df63b999 | 1160 | struct drm_plane *plane; |
415c3ac3 | 1161 | struct drm_plane_state *new_plane_state; |
f6ce410a | 1162 | int i, ret; |
e2330f07 | 1163 | |
415c3ac3 ML |
1164 | for_each_new_plane_in_state(state, plane, new_plane_state, i) { |
1165 | if (!new_plane_state->fence) | |
e2330f07 DV |
1166 | continue; |
1167 | ||
415c3ac3 | 1168 | WARN_ON(!new_plane_state->fb); |
f6ce410a GP |
1169 | |
1170 | /* | |
1171 | * If waiting for fences pre-swap (ie: nonblock), userspace can | |
1172 | * still interrupt the operation. Instead of blocking until the | |
1173 | * timer expires, make the wait interruptible. | |
1174 | */ | |
415c3ac3 | 1175 | ret = dma_fence_wait(new_plane_state->fence, pre_swap); |
f6ce410a GP |
1176 | if (ret) |
1177 | return ret; | |
e2330f07 | 1178 | |
415c3ac3 ML |
1179 | dma_fence_put(new_plane_state->fence); |
1180 | new_plane_state->fence = NULL; | |
e2330f07 | 1181 | } |
f6ce410a GP |
1182 | |
1183 | return 0; | |
e2330f07 | 1184 | } |
4c5b7f3a | 1185 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences); |
e2330f07 | 1186 | |
5ee3229c RC |
1187 | /** |
1188 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
1189 | * @dev: DRM device | |
1190 | * @old_state: atomic state object with old state structures | |
1191 | * | |
1192 | * Helper to, after atomic commit, wait for vblanks on all effected | |
1193 | * crtcs (ie. before cleaning up old framebuffers using | |
01086487 | 1194 | * drm_atomic_helper_cleanup_planes()). It will only wait on CRTCs where the |
ab58e338 DV |
1195 | * framebuffers have actually changed to optimize for the legacy cursor and |
1196 | * plane update use-case. | |
01086487 BB |
1197 | * |
1198 | * Drivers using the nonblocking commit tracking support initialized by calling | |
1199 | * drm_atomic_helper_setup_commit() should look at | |
1200 | * drm_atomic_helper_wait_for_flip_done() as an alternative. | |
5ee3229c RC |
1201 | */ |
1202 | void | |
1203 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
1204 | struct drm_atomic_state *old_state) | |
623369e5 DV |
1205 | { |
1206 | struct drm_crtc *crtc; | |
415c3ac3 | 1207 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
623369e5 | 1208 | int i, ret; |
bdc57146 | 1209 | unsigned crtc_mask = 0; |
623369e5 | 1210 | |
bdc57146 ML |
1211 | /* |
1212 | * Legacy cursor ioctls are completely unsynced, and userspace | |
1213 | * relies on that (by doing tons of cursor updates). | |
1214 | */ | |
1215 | if (old_state->legacy_cursor_update) | |
1216 | return; | |
623369e5 | 1217 | |
415c3ac3 | 1218 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
a3fbb53f | 1219 | if (!new_crtc_state->active || !new_crtc_state->planes_changed) |
ab58e338 DV |
1220 | continue; |
1221 | ||
623369e5 DV |
1222 | ret = drm_crtc_vblank_get(crtc); |
1223 | if (ret != 0) | |
1224 | continue; | |
1225 | ||
bdc57146 ML |
1226 | crtc_mask |= drm_crtc_mask(crtc); |
1227 | old_state->crtcs[i].last_vblank_count = drm_crtc_vblank_count(crtc); | |
623369e5 DV |
1228 | } |
1229 | ||
415c3ac3 | 1230 | for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
bdc57146 | 1231 | if (!(crtc_mask & drm_crtc_mask(crtc))) |
623369e5 DV |
1232 | continue; |
1233 | ||
1234 | ret = wait_event_timeout(dev->vblank[i].queue, | |
bdc57146 | 1235 | old_state->crtcs[i].last_vblank_count != |
d4853630 | 1236 | drm_crtc_vblank_count(crtc), |
623369e5 DV |
1237 | msecs_to_jiffies(50)); |
1238 | ||
6ac7c548 RK |
1239 | WARN(!ret, "[CRTC:%d:%s] vblank wait timed out\n", |
1240 | crtc->base.id, crtc->name); | |
8d4d0d70 | 1241 | |
623369e5 DV |
1242 | drm_crtc_vblank_put(crtc); |
1243 | } | |
1244 | } | |
5ee3229c | 1245 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 | 1246 | |
01086487 BB |
1247 | /** |
1248 | * drm_atomic_helper_wait_for_flip_done - wait for all page flips to be done | |
1249 | * @dev: DRM device | |
1250 | * @old_state: atomic state object with old state structures | |
1251 | * | |
1252 | * Helper to, after atomic commit, wait for page flips on all effected | |
1253 | * crtcs (ie. before cleaning up old framebuffers using | |
1254 | * drm_atomic_helper_cleanup_planes()). Compared to | |
1255 | * drm_atomic_helper_wait_for_vblanks() this waits for the completion of on all | |
1256 | * CRTCs, assuming that cursors-only updates are signalling their completion | |
1257 | * immediately (or using a different path). | |
1258 | * | |
1259 | * This requires that drivers use the nonblocking commit tracking support | |
1260 | * initialized using drm_atomic_helper_setup_commit(). | |
1261 | */ | |
1262 | void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev, | |
1263 | struct drm_atomic_state *old_state) | |
1264 | { | |
1265 | struct drm_crtc_state *crtc_state; | |
1266 | struct drm_crtc *crtc; | |
1267 | int i; | |
1268 | ||
1269 | for_each_crtc_in_state(old_state, crtc, crtc_state, i) { | |
1270 | struct drm_crtc_commit *commit = old_state->crtcs[i].commit; | |
1271 | int ret; | |
1272 | ||
1273 | if (!commit) | |
1274 | continue; | |
1275 | ||
1276 | ret = wait_for_completion_timeout(&commit->flip_done, 10 * HZ); | |
1277 | if (ret == 0) | |
1278 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
1279 | crtc->base.id, crtc->name); | |
1280 | } | |
1281 | } | |
1282 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_flip_done); | |
1283 | ||
623369e5 | 1284 | /** |
9f2a7950 | 1285 | * drm_atomic_helper_commit_tail - commit atomic update to hardware |
1ea0c02e | 1286 | * @old_state: atomic state object with old state structures |
623369e5 | 1287 | * |
6806cdf9 DV |
1288 | * This is the default implementation for the |
1289 | * &drm_mode_config_helper_funcs.atomic_commit_tail hook. | |
623369e5 | 1290 | * |
9f2a7950 DV |
1291 | * Note that the default ordering of how the various stages are called is to |
1292 | * match the legacy modeset helper library closest. One peculiarity of that is | |
1293 | * that it doesn't mesh well with runtime PM at all. | |
6e48ae32 | 1294 | * |
9f2a7950 | 1295 | * For drivers supporting runtime PM the recommended sequence is instead :: |
6e48ae32 | 1296 | * |
1ea0c02e | 1297 | * drm_atomic_helper_commit_modeset_disables(dev, old_state); |
6e48ae32 | 1298 | * |
1ea0c02e | 1299 | * drm_atomic_helper_commit_modeset_enables(dev, old_state); |
6e48ae32 | 1300 | * |
1ea0c02e | 1301 | * drm_atomic_helper_commit_planes(dev, old_state, |
2b58e98d | 1302 | * DRM_PLANE_COMMIT_ACTIVE_ONLY); |
6e48ae32 | 1303 | * |
9f2a7950 DV |
1304 | * for committing the atomic update to hardware. See the kerneldoc entries for |
1305 | * these three functions for more details. | |
1306 | */ | |
1ea0c02e | 1307 | void drm_atomic_helper_commit_tail(struct drm_atomic_state *old_state) |
9f2a7950 | 1308 | { |
1ea0c02e | 1309 | struct drm_device *dev = old_state->dev; |
9f2a7950 | 1310 | |
1ea0c02e | 1311 | drm_atomic_helper_commit_modeset_disables(dev, old_state); |
9f2a7950 | 1312 | |
1ea0c02e | 1313 | drm_atomic_helper_commit_planes(dev, old_state, 0); |
9f2a7950 | 1314 | |
1ea0c02e | 1315 | drm_atomic_helper_commit_modeset_enables(dev, old_state); |
9f2a7950 | 1316 | |
1ea0c02e | 1317 | drm_atomic_helper_commit_hw_done(old_state); |
9f2a7950 | 1318 | |
1ea0c02e | 1319 | drm_atomic_helper_wait_for_vblanks(dev, old_state); |
9f2a7950 | 1320 | |
1ea0c02e | 1321 | drm_atomic_helper_cleanup_planes(dev, old_state); |
9f2a7950 DV |
1322 | } |
1323 | EXPORT_SYMBOL(drm_atomic_helper_commit_tail); | |
1324 | ||
1ea0c02e | 1325 | static void commit_tail(struct drm_atomic_state *old_state) |
9f2a7950 | 1326 | { |
1ea0c02e | 1327 | struct drm_device *dev = old_state->dev; |
a4b10cce | 1328 | const struct drm_mode_config_helper_funcs *funcs; |
9f2a7950 DV |
1329 | |
1330 | funcs = dev->mode_config.helper_private; | |
1331 | ||
1ea0c02e | 1332 | drm_atomic_helper_wait_for_fences(dev, old_state, false); |
9f2a7950 | 1333 | |
1ea0c02e | 1334 | drm_atomic_helper_wait_for_dependencies(old_state); |
9f2a7950 DV |
1335 | |
1336 | if (funcs && funcs->atomic_commit_tail) | |
1ea0c02e | 1337 | funcs->atomic_commit_tail(old_state); |
9f2a7950 | 1338 | else |
1ea0c02e | 1339 | drm_atomic_helper_commit_tail(old_state); |
9f2a7950 | 1340 | |
1ea0c02e | 1341 | drm_atomic_helper_commit_cleanup_done(old_state); |
9f2a7950 | 1342 | |
1ea0c02e | 1343 | drm_atomic_state_put(old_state); |
9f2a7950 DV |
1344 | } |
1345 | ||
1346 | static void commit_work(struct work_struct *work) | |
1347 | { | |
1348 | struct drm_atomic_state *state = container_of(work, | |
1349 | struct drm_atomic_state, | |
1350 | commit_work); | |
1351 | commit_tail(state); | |
1352 | } | |
1353 | ||
1354 | /** | |
1355 | * drm_atomic_helper_commit - commit validated state object | |
1356 | * @dev: DRM device | |
1357 | * @state: the driver state object | |
1358 | * @nonblock: whether nonblocking behavior is requested. | |
1359 | * | |
1360 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
1361 | * object. This can still fail when e.g. the framebuffer reservation fails. This | |
1362 | * function implements nonblocking commits, using | |
1363 | * drm_atomic_helper_setup_commit() and related functions. | |
1364 | * | |
9f2a7950 | 1365 | * Committing the actual hardware state is done through the |
6806cdf9 DV |
1366 | * &drm_mode_config_helper_funcs.atomic_commit_tail callback, or it's default |
1367 | * implementation drm_atomic_helper_commit_tail(). | |
6e48ae32 | 1368 | * |
c39032a8 | 1369 | * RETURNS: |
623369e5 DV |
1370 | * Zero for success or -errno. |
1371 | */ | |
1372 | int drm_atomic_helper_commit(struct drm_device *dev, | |
1373 | struct drm_atomic_state *state, | |
286dbb8d | 1374 | bool nonblock) |
623369e5 DV |
1375 | { |
1376 | int ret; | |
1377 | ||
a095caa7 DV |
1378 | ret = drm_atomic_helper_setup_commit(state, nonblock); |
1379 | if (ret) | |
1380 | return ret; | |
1381 | ||
9f2a7950 DV |
1382 | INIT_WORK(&state->commit_work, commit_work); |
1383 | ||
623369e5 DV |
1384 | ret = drm_atomic_helper_prepare_planes(dev, state); |
1385 | if (ret) | |
1386 | return ret; | |
1387 | ||
f6ce410a GP |
1388 | if (!nonblock) { |
1389 | ret = drm_atomic_helper_wait_for_fences(dev, state, true); | |
aebe55c2 LP |
1390 | if (ret) { |
1391 | drm_atomic_helper_cleanup_planes(dev, state); | |
f6ce410a | 1392 | return ret; |
aebe55c2 | 1393 | } |
f6ce410a GP |
1394 | } |
1395 | ||
623369e5 DV |
1396 | /* |
1397 | * This is the point of no return - everything below never fails except | |
1398 | * when the hw goes bonghits. Which means we can commit the new state on | |
1399 | * the software side now. | |
1400 | */ | |
1401 | ||
5e84c269 | 1402 | drm_atomic_helper_swap_state(state, true); |
623369e5 DV |
1403 | |
1404 | /* | |
1405 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 1406 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
1407 | * that the asynchronous work has either been cancelled (if the driver |
1408 | * supports it, which at least requires that the framebuffers get | |
1409 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
1410 | * before the new state gets committed on the software side with | |
1411 | * drm_atomic_helper_swap_state(). | |
1412 | * | |
1413 | * This scheme allows new atomic state updates to be prepared and | |
1414 | * checked in parallel to the asynchronous completion of the previous | |
1415 | * update. Which is important since compositors need to figure out the | |
1416 | * composition of the next frame right after having submitted the | |
1417 | * current layout. | |
9f2a7950 DV |
1418 | * |
1419 | * NOTE: Commit work has multiple phases, first hardware commit, then | |
1420 | * cleanup. We want them to overlap, hence need system_unbound_wq to | |
1421 | * make sure work items don't artifically stall on each another. | |
623369e5 DV |
1422 | */ |
1423 | ||
0853695c | 1424 | drm_atomic_state_get(state); |
9f2a7950 DV |
1425 | if (nonblock) |
1426 | queue_work(system_unbound_wq, &state->commit_work); | |
1427 | else | |
1428 | commit_tail(state); | |
623369e5 DV |
1429 | |
1430 | return 0; | |
1431 | } | |
1432 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1433 | ||
e8c833a7 | 1434 | /** |
286dbb8d | 1435 | * DOC: implementing nonblocking commit |
e8c833a7 | 1436 | * |
9f2a7950 | 1437 | * Nonblocking atomic commits have to be implemented in the following sequence: |
e8c833a7 DV |
1438 | * |
1439 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
1440 | * which commit needs to call which can fail, so we want to run it first and | |
1441 | * synchronously. | |
1442 | * | |
286dbb8d | 1443 | * 2. Synchronize with any outstanding nonblocking commit worker threads which |
e8c833a7 DV |
1444 | * might be affected the new state update. This can be done by either cancelling |
1445 | * or flushing the work items, depending upon whether the driver can deal with | |
1446 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
1447 | * cleanup is still done when cancelling. | |
1448 | * | |
9f2a7950 DV |
1449 | * Asynchronous workers need to have sufficient parallelism to be able to run |
1450 | * different atomic commits on different CRTCs in parallel. The simplest way to | |
1451 | * achive this is by running them on the &system_unbound_wq work queue. Note | |
1452 | * that drivers are not required to split up atomic commits and run an | |
1453 | * individual commit in parallel - userspace is supposed to do that if it cares. | |
1454 | * But it might be beneficial to do that for modesets, since those necessarily | |
1455 | * must be done as one global operation, and enabling or disabling a CRTC can | |
1456 | * take a long time. But even that is not required. | |
e8c833a7 DV |
1457 | * |
1458 | * 3. The software state is updated synchronously with | |
26196f7e | 1459 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
e8c833a7 | 1460 | * locks means concurrent callers never see inconsistent state. And doing this |
286dbb8d ML |
1461 | * while it's guaranteed that no relevant nonblocking worker runs means that |
1462 | * nonblocking workers do not need grab any locks. Actually they must not grab | |
1463 | * locks, for otherwise the work flushing will deadlock. | |
e8c833a7 DV |
1464 | * |
1465 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1466 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1467 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
1468 | * being displayed. | |
9f2a7950 DV |
1469 | * |
1470 | * The above scheme is implemented in the atomic helper libraries in | |
1471 | * drm_atomic_helper_commit() using a bunch of helper functions. See | |
1472 | * drm_atomic_helper_setup_commit() for a starting point. | |
e8c833a7 DV |
1473 | */ |
1474 | ||
a095caa7 DV |
1475 | static int stall_checks(struct drm_crtc *crtc, bool nonblock) |
1476 | { | |
1477 | struct drm_crtc_commit *commit, *stall_commit = NULL; | |
1478 | bool completed = true; | |
1479 | int i; | |
1480 | long ret = 0; | |
1481 | ||
1482 | spin_lock(&crtc->commit_lock); | |
1483 | i = 0; | |
1484 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) { | |
1485 | if (i == 0) { | |
1486 | completed = try_wait_for_completion(&commit->flip_done); | |
1487 | /* Userspace is not allowed to get ahead of the previous | |
1488 | * commit with nonblocking ones. */ | |
1489 | if (!completed && nonblock) { | |
1490 | spin_unlock(&crtc->commit_lock); | |
1491 | return -EBUSY; | |
1492 | } | |
1493 | } else if (i == 1) { | |
1494 | stall_commit = commit; | |
1495 | drm_crtc_commit_get(stall_commit); | |
a095caa7 | 1496 | break; |
723c3e55 | 1497 | } |
a095caa7 DV |
1498 | |
1499 | i++; | |
1500 | } | |
1501 | spin_unlock(&crtc->commit_lock); | |
1502 | ||
1503 | if (!stall_commit) | |
1504 | return 0; | |
1505 | ||
1506 | /* We don't want to let commits get ahead of cleanup work too much, | |
1507 | * stalling on 2nd previous commit means triple-buffer won't ever stall. | |
1508 | */ | |
723c3e55 | 1509 | ret = wait_for_completion_interruptible_timeout(&stall_commit->cleanup_done, |
a095caa7 DV |
1510 | 10*HZ); |
1511 | if (ret == 0) | |
1512 | DRM_ERROR("[CRTC:%d:%s] cleanup_done timed out\n", | |
1513 | crtc->base.id, crtc->name); | |
1514 | ||
1515 | drm_crtc_commit_put(stall_commit); | |
1516 | ||
1517 | return ret < 0 ? ret : 0; | |
1518 | } | |
1519 | ||
899cc5f1 | 1520 | static void release_crtc_commit(struct completion *completion) |
24835e44 DV |
1521 | { |
1522 | struct drm_crtc_commit *commit = container_of(completion, | |
1523 | typeof(*commit), | |
1524 | flip_done); | |
1525 | ||
1526 | drm_crtc_commit_put(commit); | |
1527 | } | |
1528 | ||
a095caa7 DV |
1529 | /** |
1530 | * drm_atomic_helper_setup_commit - setup possibly nonblocking commit | |
1531 | * @state: new modeset state to be committed | |
1532 | * @nonblock: whether nonblocking behavior is requested. | |
1533 | * | |
1534 | * This function prepares @state to be used by the atomic helper's support for | |
1535 | * nonblocking commits. Drivers using the nonblocking commit infrastructure | |
6806cdf9 DV |
1536 | * should always call this function from their |
1537 | * &drm_mode_config_funcs.atomic_commit hook. | |
a095caa7 DV |
1538 | * |
1539 | * To be able to use this support drivers need to use a few more helper | |
1540 | * functions. drm_atomic_helper_wait_for_dependencies() must be called before | |
1541 | * actually committing the hardware state, and for nonblocking commits this call | |
1542 | * must be placed in the async worker. See also drm_atomic_helper_swap_state() | |
1543 | * and it's stall parameter, for when a driver's commit hooks look at the | |
6806cdf9 | 1544 | * &drm_crtc.state, &drm_plane.state or &drm_connector.state pointer directly. |
a095caa7 DV |
1545 | * |
1546 | * Completion of the hardware commit step must be signalled using | |
1547 | * drm_atomic_helper_commit_hw_done(). After this step the driver is not allowed | |
1548 | * to read or change any permanent software or hardware modeset state. The only | |
1549 | * exception is state protected by other means than &drm_modeset_lock locks. | |
1550 | * Only the free standing @state with pointers to the old state structures can | |
1551 | * be inspected, e.g. to clean up old buffers using | |
1552 | * drm_atomic_helper_cleanup_planes(). | |
1553 | * | |
1554 | * At the very end, before cleaning up @state drivers must call | |
1555 | * drm_atomic_helper_commit_cleanup_done(). | |
1556 | * | |
1557 | * This is all implemented by in drm_atomic_helper_commit(), giving drivers a | |
1558 | * complete and esay-to-use default implementation of the atomic_commit() hook. | |
1559 | * | |
1560 | * The tracking of asynchronously executed and still pending commits is done | |
1561 | * using the core structure &drm_crtc_commit. | |
1562 | * | |
1563 | * By default there's no need to clean up resources allocated by this function | |
1564 | * explicitly: drm_atomic_state_default_clear() will take care of that | |
1565 | * automatically. | |
1566 | * | |
1567 | * Returns: | |
1568 | * | |
1569 | * 0 on success. -EBUSY when userspace schedules nonblocking commits too fast, | |
1570 | * -ENOMEM on allocation failures and -EINTR when a signal is pending. | |
1571 | */ | |
1572 | int drm_atomic_helper_setup_commit(struct drm_atomic_state *state, | |
1573 | bool nonblock) | |
1574 | { | |
1575 | struct drm_crtc *crtc; | |
415c3ac3 | 1576 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
a095caa7 DV |
1577 | struct drm_crtc_commit *commit; |
1578 | int i, ret; | |
1579 | ||
415c3ac3 | 1580 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
a095caa7 DV |
1581 | commit = kzalloc(sizeof(*commit), GFP_KERNEL); |
1582 | if (!commit) | |
1583 | return -ENOMEM; | |
1584 | ||
1585 | init_completion(&commit->flip_done); | |
1586 | init_completion(&commit->hw_done); | |
1587 | init_completion(&commit->cleanup_done); | |
1588 | INIT_LIST_HEAD(&commit->commit_entry); | |
1589 | kref_init(&commit->ref); | |
1590 | commit->crtc = crtc; | |
1591 | ||
1592 | state->crtcs[i].commit = commit; | |
1593 | ||
1594 | ret = stall_checks(crtc, nonblock); | |
1595 | if (ret) | |
1596 | return ret; | |
1597 | ||
1598 | /* Drivers only send out events when at least either current or | |
1599 | * new CRTC state is active. Complete right away if everything | |
1600 | * stays off. */ | |
415c3ac3 | 1601 | if (!old_crtc_state->active && !new_crtc_state->active) { |
a095caa7 DV |
1602 | complete_all(&commit->flip_done); |
1603 | continue; | |
1604 | } | |
1605 | ||
1606 | /* Legacy cursor updates are fully unsynced. */ | |
1607 | if (state->legacy_cursor_update) { | |
1608 | complete_all(&commit->flip_done); | |
1609 | continue; | |
1610 | } | |
1611 | ||
415c3ac3 | 1612 | if (!new_crtc_state->event) { |
a095caa7 DV |
1613 | commit->event = kzalloc(sizeof(*commit->event), |
1614 | GFP_KERNEL); | |
1615 | if (!commit->event) | |
1616 | return -ENOMEM; | |
1617 | ||
415c3ac3 | 1618 | new_crtc_state->event = commit->event; |
a095caa7 DV |
1619 | } |
1620 | ||
415c3ac3 ML |
1621 | new_crtc_state->event->base.completion = &commit->flip_done; |
1622 | new_crtc_state->event->base.completion_release = release_crtc_commit; | |
24835e44 | 1623 | drm_crtc_commit_get(commit); |
a095caa7 DV |
1624 | } |
1625 | ||
1626 | return 0; | |
1627 | } | |
1628 | EXPORT_SYMBOL(drm_atomic_helper_setup_commit); | |
1629 | ||
1630 | ||
1631 | static struct drm_crtc_commit *preceeding_commit(struct drm_crtc *crtc) | |
1632 | { | |
1633 | struct drm_crtc_commit *commit; | |
1634 | int i = 0; | |
1635 | ||
1636 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) { | |
1637 | /* skip the first entry, that's the current commit */ | |
1638 | if (i == 1) | |
1639 | return commit; | |
1640 | i++; | |
1641 | } | |
1642 | ||
1643 | return NULL; | |
1644 | } | |
1645 | ||
1646 | /** | |
1647 | * drm_atomic_helper_wait_for_dependencies - wait for required preceeding commits | |
1ea0c02e | 1648 | * @old_state: atomic state object with old state structures |
a095caa7 DV |
1649 | * |
1650 | * This function waits for all preceeding commits that touch the same CRTC as | |
1ea0c02e | 1651 | * @old_state to both be committed to the hardware (as signalled by |
a095caa7 | 1652 | * drm_atomic_helper_commit_hw_done) and executed by the hardware (as signalled |
6806cdf9 | 1653 | * by calling drm_crtc_vblank_send_event() on the &drm_crtc_state.event). |
a095caa7 DV |
1654 | * |
1655 | * This is part of the atomic helper support for nonblocking commits, see | |
1656 | * drm_atomic_helper_setup_commit() for an overview. | |
1657 | */ | |
1ea0c02e | 1658 | void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *old_state) |
a095caa7 DV |
1659 | { |
1660 | struct drm_crtc *crtc; | |
415c3ac3 | 1661 | struct drm_crtc_state *new_crtc_state; |
a095caa7 DV |
1662 | struct drm_crtc_commit *commit; |
1663 | int i; | |
1664 | long ret; | |
1665 | ||
415c3ac3 | 1666 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { |
a095caa7 DV |
1667 | spin_lock(&crtc->commit_lock); |
1668 | commit = preceeding_commit(crtc); | |
1669 | if (commit) | |
1670 | drm_crtc_commit_get(commit); | |
1671 | spin_unlock(&crtc->commit_lock); | |
1672 | ||
1673 | if (!commit) | |
1674 | continue; | |
1675 | ||
1676 | ret = wait_for_completion_timeout(&commit->hw_done, | |
1677 | 10*HZ); | |
1678 | if (ret == 0) | |
1679 | DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n", | |
1680 | crtc->base.id, crtc->name); | |
1681 | ||
1682 | /* Currently no support for overwriting flips, hence | |
1683 | * stall for previous one to execute completely. */ | |
1684 | ret = wait_for_completion_timeout(&commit->flip_done, | |
1685 | 10*HZ); | |
1686 | if (ret == 0) | |
1687 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
1688 | crtc->base.id, crtc->name); | |
1689 | ||
1690 | drm_crtc_commit_put(commit); | |
1691 | } | |
1692 | } | |
1693 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies); | |
1694 | ||
1695 | /** | |
1696 | * drm_atomic_helper_commit_hw_done - setup possible nonblocking commit | |
1ea0c02e | 1697 | * @old_state: atomic state object with old state structures |
a095caa7 DV |
1698 | * |
1699 | * This function is used to signal completion of the hardware commit step. After | |
1700 | * this step the driver is not allowed to read or change any permanent software | |
1701 | * or hardware modeset state. The only exception is state protected by other | |
1702 | * means than &drm_modeset_lock locks. | |
1703 | * | |
1704 | * Drivers should try to postpone any expensive or delayed cleanup work after | |
1705 | * this function is called. | |
1706 | * | |
1707 | * This is part of the atomic helper support for nonblocking commits, see | |
1708 | * drm_atomic_helper_setup_commit() for an overview. | |
1709 | */ | |
1ea0c02e | 1710 | void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *old_state) |
a095caa7 DV |
1711 | { |
1712 | struct drm_crtc *crtc; | |
415c3ac3 | 1713 | struct drm_crtc_state *new_crtc_state; |
a095caa7 DV |
1714 | struct drm_crtc_commit *commit; |
1715 | int i; | |
1716 | ||
415c3ac3 | 1717 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { |
1ea0c02e | 1718 | commit = old_state->crtcs[i].commit; |
a095caa7 DV |
1719 | if (!commit) |
1720 | continue; | |
1721 | ||
1722 | /* backend must have consumed any event by now */ | |
415c3ac3 | 1723 | WARN_ON(new_crtc_state->event); |
a095caa7 | 1724 | complete_all(&commit->hw_done); |
a095caa7 DV |
1725 | } |
1726 | } | |
1727 | EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done); | |
1728 | ||
1729 | /** | |
1730 | * drm_atomic_helper_commit_cleanup_done - signal completion of commit | |
1ea0c02e | 1731 | * @old_state: atomic state object with old state structures |
a095caa7 | 1732 | * |
1ea0c02e DV |
1733 | * This signals completion of the atomic update @old_state, including any |
1734 | * cleanup work. If used, it must be called right before calling | |
0853695c | 1735 | * drm_atomic_state_put(). |
a095caa7 DV |
1736 | * |
1737 | * This is part of the atomic helper support for nonblocking commits, see | |
1738 | * drm_atomic_helper_setup_commit() for an overview. | |
1739 | */ | |
1ea0c02e | 1740 | void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *old_state) |
a095caa7 DV |
1741 | { |
1742 | struct drm_crtc *crtc; | |
415c3ac3 | 1743 | struct drm_crtc_state *new_crtc_state; |
a095caa7 DV |
1744 | struct drm_crtc_commit *commit; |
1745 | int i; | |
1746 | long ret; | |
1747 | ||
415c3ac3 | 1748 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { |
1ea0c02e | 1749 | commit = old_state->crtcs[i].commit; |
a095caa7 DV |
1750 | if (WARN_ON(!commit)) |
1751 | continue; | |
1752 | ||
a095caa7 DV |
1753 | complete_all(&commit->cleanup_done); |
1754 | WARN_ON(!try_wait_for_completion(&commit->hw_done)); | |
1755 | ||
1756 | /* commit_list borrows our reference, need to remove before we | |
1757 | * clean up our drm_atomic_state. But only after it actually | |
1758 | * completed, otherwise subsequent commits won't stall properly. */ | |
7deef7f1 DV |
1759 | if (try_wait_for_completion(&commit->flip_done)) |
1760 | goto del_commit; | |
a095caa7 | 1761 | |
a095caa7 DV |
1762 | /* We must wait for the vblank event to signal our completion |
1763 | * before releasing our reference, since the vblank work does | |
1764 | * not hold a reference of its own. */ | |
1765 | ret = wait_for_completion_timeout(&commit->flip_done, | |
1766 | 10*HZ); | |
1767 | if (ret == 0) | |
1768 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
1769 | crtc->base.id, crtc->name); | |
1770 | ||
7deef7f1 | 1771 | del_commit: |
7141fd3e | 1772 | spin_lock(&crtc->commit_lock); |
a095caa7 DV |
1773 | list_del(&commit->commit_entry); |
1774 | spin_unlock(&crtc->commit_lock); | |
1775 | } | |
1776 | } | |
1777 | EXPORT_SYMBOL(drm_atomic_helper_commit_cleanup_done); | |
1778 | ||
c2fcd274 | 1779 | /** |
2e3afd47 | 1780 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 1781 | * @dev: DRM device |
2e3afd47 | 1782 | * @state: atomic state object with new state structures |
c2fcd274 DV |
1783 | * |
1784 | * This function prepares plane state, specifically framebuffers, for the new | |
6806cdf9 DV |
1785 | * configuration, by calling &drm_plane_helper_funcs.prepare_fb. If any failure |
1786 | * is encountered this function will call &drm_plane_helper_funcs.cleanup_fb on | |
1787 | * any already successfully prepared framebuffer. | |
c2fcd274 DV |
1788 | * |
1789 | * Returns: | |
1790 | * 0 on success, negative error code on failure. | |
1791 | */ | |
1792 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
1793 | struct drm_atomic_state *state) | |
1794 | { | |
be9174a4 | 1795 | struct drm_plane *plane; |
415c3ac3 | 1796 | struct drm_plane_state *new_plane_state; |
be9174a4 | 1797 | int ret, i, j; |
c2fcd274 | 1798 | |
415c3ac3 | 1799 | for_each_new_plane_in_state(state, plane, new_plane_state, i) { |
b5ceff20 | 1800 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
1801 | |
1802 | funcs = plane->helper_private; | |
1803 | ||
844f9111 | 1804 | if (funcs->prepare_fb) { |
415c3ac3 | 1805 | ret = funcs->prepare_fb(plane, new_plane_state); |
c2fcd274 DV |
1806 | if (ret) |
1807 | goto fail; | |
1808 | } | |
1809 | } | |
1810 | ||
1811 | return 0; | |
1812 | ||
1813 | fail: | |
415c3ac3 | 1814 | for_each_new_plane_in_state(state, plane, new_plane_state, j) { |
b5ceff20 | 1815 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 1816 | |
be9174a4 | 1817 | if (j >= i) |
c2fcd274 DV |
1818 | continue; |
1819 | ||
1820 | funcs = plane->helper_private; | |
1821 | ||
844f9111 | 1822 | if (funcs->cleanup_fb) |
415c3ac3 | 1823 | funcs->cleanup_fb(plane, new_plane_state); |
c2fcd274 DV |
1824 | } |
1825 | ||
1826 | return ret; | |
1827 | } | |
1828 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
1829 | ||
7135ac54 | 1830 | static bool plane_crtc_active(const struct drm_plane_state *state) |
aef9dbb8 DV |
1831 | { |
1832 | return state->crtc && state->crtc->state->active; | |
1833 | } | |
1834 | ||
c2fcd274 DV |
1835 | /** |
1836 | * drm_atomic_helper_commit_planes - commit plane state | |
1837 | * @dev: DRM device | |
b0fcfc89 | 1838 | * @old_state: atomic state object with old state structures |
2b58e98d | 1839 | * @flags: flags for committing plane state |
c2fcd274 DV |
1840 | * |
1841 | * This function commits the new plane state using the plane and atomic helper | |
1842 | * functions for planes and crtcs. It assumes that the atomic state has already | |
1843 | * been pushed into the relevant object state pointers, since this step can no | |
1844 | * longer fail. | |
1845 | * | |
b0fcfc89 | 1846 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 | 1847 | * crtcs need to be updated though. |
de28d021 ML |
1848 | * |
1849 | * Note that this function does all plane updates across all CRTCs in one step. | |
1850 | * If the hardware can't support this approach look at | |
1851 | * drm_atomic_helper_commit_planes_on_crtc() instead. | |
6e48ae32 DV |
1852 | * |
1853 | * Plane parameters can be updated by applications while the associated CRTC is | |
1854 | * disabled. The DRM/KMS core will store the parameters in the plane state, | |
1855 | * which will be available to the driver when the CRTC is turned on. As a result | |
1856 | * most drivers don't need to be immediately notified of plane updates for a | |
1857 | * disabled CRTC. | |
1858 | * | |
2b58e98d LY |
1859 | * Unless otherwise needed, drivers are advised to set the ACTIVE_ONLY flag in |
1860 | * @flags in order not to receive plane update notifications related to a | |
1861 | * disabled CRTC. This avoids the need to manually ignore plane updates in | |
6e48ae32 DV |
1862 | * driver code when the driver and/or hardware can't or just don't need to deal |
1863 | * with updates on disabled CRTCs, for example when supporting runtime PM. | |
1864 | * | |
2b58e98d LY |
1865 | * Drivers may set the NO_DISABLE_AFTER_MODESET flag in @flags if the relevant |
1866 | * display controllers require to disable a CRTC's planes when the CRTC is | |
6806cdf9 DV |
1867 | * disabled. This function would skip the &drm_plane_helper_funcs.atomic_disable |
1868 | * call for a plane if the CRTC of the old plane state needs a modesetting | |
1869 | * operation. Of course, the drivers need to disable the planes in their CRTC | |
1870 | * disable callbacks since no one else would do that. | |
2b58e98d LY |
1871 | * |
1872 | * The drm_atomic_helper_commit() default implementation doesn't set the | |
1873 | * ACTIVE_ONLY flag to most closely match the behaviour of the legacy helpers. | |
1874 | * This should not be copied blindly by drivers. | |
c2fcd274 DV |
1875 | */ |
1876 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
aef9dbb8 | 1877 | struct drm_atomic_state *old_state, |
2b58e98d | 1878 | uint32_t flags) |
c2fcd274 | 1879 | { |
df63b999 | 1880 | struct drm_crtc *crtc; |
415c3ac3 | 1881 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
df63b999 | 1882 | struct drm_plane *plane; |
415c3ac3 | 1883 | struct drm_plane_state *old_plane_state, *new_plane_state; |
c2fcd274 | 1884 | int i; |
2b58e98d LY |
1885 | bool active_only = flags & DRM_PLANE_COMMIT_ACTIVE_ONLY; |
1886 | bool no_disable = flags & DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET; | |
c2fcd274 | 1887 | |
415c3ac3 | 1888 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
b5ceff20 | 1889 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1890 | |
1891 | funcs = crtc->helper_private; | |
1892 | ||
1893 | if (!funcs || !funcs->atomic_begin) | |
1894 | continue; | |
1895 | ||
415c3ac3 | 1896 | if (active_only && !new_crtc_state->active) |
aef9dbb8 DV |
1897 | continue; |
1898 | ||
613d2b27 | 1899 | funcs->atomic_begin(crtc, old_crtc_state); |
c2fcd274 DV |
1900 | } |
1901 | ||
415c3ac3 | 1902 | for_each_oldnew_plane_in_state(old_state, plane, old_plane_state, new_plane_state, i) { |
b5ceff20 | 1903 | const struct drm_plane_helper_funcs *funcs; |
216c59d6 | 1904 | bool disabling; |
c2fcd274 DV |
1905 | |
1906 | funcs = plane->helper_private; | |
1907 | ||
3cad4b68 | 1908 | if (!funcs) |
c2fcd274 DV |
1909 | continue; |
1910 | ||
51ffa12d ML |
1911 | disabling = drm_atomic_plane_disabling(old_plane_state, |
1912 | new_plane_state); | |
216c59d6 LP |
1913 | |
1914 | if (active_only) { | |
1915 | /* | |
1916 | * Skip planes related to inactive CRTCs. If the plane | |
1917 | * is enabled use the state of the current CRTC. If the | |
1918 | * plane is being disabled use the state of the old | |
1919 | * CRTC to avoid skipping planes being disabled on an | |
1920 | * active CRTC. | |
1921 | */ | |
415c3ac3 | 1922 | if (!disabling && !plane_crtc_active(new_plane_state)) |
216c59d6 LP |
1923 | continue; |
1924 | if (disabling && !plane_crtc_active(old_plane_state)) | |
1925 | continue; | |
1926 | } | |
aef9dbb8 | 1927 | |
407b8bd9 TR |
1928 | /* |
1929 | * Special-case disabling the plane if drivers support it. | |
1930 | */ | |
2b58e98d LY |
1931 | if (disabling && funcs->atomic_disable) { |
1932 | struct drm_crtc_state *crtc_state; | |
1933 | ||
1934 | crtc_state = old_plane_state->crtc->state; | |
1935 | ||
1936 | if (drm_atomic_crtc_needs_modeset(crtc_state) && | |
1937 | no_disable) | |
1938 | continue; | |
1939 | ||
407b8bd9 | 1940 | funcs->atomic_disable(plane, old_plane_state); |
415c3ac3 | 1941 | } else if (new_plane_state->crtc || disabling) { |
407b8bd9 | 1942 | funcs->atomic_update(plane, old_plane_state); |
2b58e98d | 1943 | } |
c2fcd274 DV |
1944 | } |
1945 | ||
415c3ac3 | 1946 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
b5ceff20 | 1947 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
1948 | |
1949 | funcs = crtc->helper_private; | |
1950 | ||
1951 | if (!funcs || !funcs->atomic_flush) | |
1952 | continue; | |
1953 | ||
415c3ac3 | 1954 | if (active_only && !new_crtc_state->active) |
aef9dbb8 DV |
1955 | continue; |
1956 | ||
613d2b27 | 1957 | funcs->atomic_flush(crtc, old_crtc_state); |
c2fcd274 DV |
1958 | } |
1959 | } | |
1960 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
1961 | ||
de28d021 ML |
1962 | /** |
1963 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc | |
1964 | * @old_crtc_state: atomic state object with the old crtc state | |
1965 | * | |
1966 | * This function commits the new plane state using the plane and atomic helper | |
1967 | * functions for planes on the specific crtc. It assumes that the atomic state | |
1968 | * has already been pushed into the relevant object state pointers, since this | |
1969 | * step can no longer fail. | |
1970 | * | |
1971 | * This function is useful when plane updates should be done crtc-by-crtc | |
1972 | * instead of one global step like drm_atomic_helper_commit_planes() does. | |
1973 | * | |
1974 | * This function can only be savely used when planes are not allowed to move | |
1975 | * between different CRTCs because this function doesn't handle inter-CRTC | |
1976 | * depencies. Callers need to ensure that either no such depencies exist, | |
1977 | * resolve them through ordering of commit calls or through some other means. | |
1978 | */ | |
1979 | void | |
1980 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) | |
1981 | { | |
1982 | const struct drm_crtc_helper_funcs *crtc_funcs; | |
1983 | struct drm_crtc *crtc = old_crtc_state->crtc; | |
1984 | struct drm_atomic_state *old_state = old_crtc_state->state; | |
1985 | struct drm_plane *plane; | |
1986 | unsigned plane_mask; | |
1987 | ||
1988 | plane_mask = old_crtc_state->plane_mask; | |
1989 | plane_mask |= crtc->state->plane_mask; | |
1990 | ||
1991 | crtc_funcs = crtc->helper_private; | |
1992 | if (crtc_funcs && crtc_funcs->atomic_begin) | |
613d2b27 | 1993 | crtc_funcs->atomic_begin(crtc, old_crtc_state); |
de28d021 ML |
1994 | |
1995 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { | |
1996 | struct drm_plane_state *old_plane_state = | |
b4d93679 | 1997 | drm_atomic_get_old_plane_state(old_state, plane); |
de28d021 ML |
1998 | const struct drm_plane_helper_funcs *plane_funcs; |
1999 | ||
2000 | plane_funcs = plane->helper_private; | |
2001 | ||
2002 | if (!old_plane_state || !plane_funcs) | |
2003 | continue; | |
2004 | ||
2005 | WARN_ON(plane->state->crtc && plane->state->crtc != crtc); | |
2006 | ||
51ffa12d | 2007 | if (drm_atomic_plane_disabling(old_plane_state, plane->state) && |
de28d021 ML |
2008 | plane_funcs->atomic_disable) |
2009 | plane_funcs->atomic_disable(plane, old_plane_state); | |
2010 | else if (plane->state->crtc || | |
51ffa12d | 2011 | drm_atomic_plane_disabling(old_plane_state, plane->state)) |
de28d021 ML |
2012 | plane_funcs->atomic_update(plane, old_plane_state); |
2013 | } | |
2014 | ||
2015 | if (crtc_funcs && crtc_funcs->atomic_flush) | |
613d2b27 | 2016 | crtc_funcs->atomic_flush(crtc, old_crtc_state); |
de28d021 ML |
2017 | } |
2018 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); | |
2019 | ||
6753ba97 JS |
2020 | /** |
2021 | * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes | |
28500291 | 2022 | * @old_crtc_state: atomic state object with the old CRTC state |
6753ba97 JS |
2023 | * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks |
2024 | * | |
2025 | * Disables all planes associated with the given CRTC. This can be | |
28500291 LY |
2026 | * used for instance in the CRTC helper atomic_disable callback to disable |
2027 | * all planes. | |
6753ba97 JS |
2028 | * |
2029 | * If the atomic-parameter is set the function calls the CRTC's | |
2030 | * atomic_begin hook before and atomic_flush hook after disabling the | |
2031 | * planes. | |
2032 | * | |
2033 | * It is a bug to call this function without having implemented the | |
6806cdf9 | 2034 | * &drm_plane_helper_funcs.atomic_disable plane hook. |
6753ba97 | 2035 | */ |
28500291 LY |
2036 | void |
2037 | drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state, | |
2038 | bool atomic) | |
6753ba97 | 2039 | { |
28500291 | 2040 | struct drm_crtc *crtc = old_crtc_state->crtc; |
6753ba97 JS |
2041 | const struct drm_crtc_helper_funcs *crtc_funcs = |
2042 | crtc->helper_private; | |
2043 | struct drm_plane *plane; | |
2044 | ||
2045 | if (atomic && crtc_funcs && crtc_funcs->atomic_begin) | |
2046 | crtc_funcs->atomic_begin(crtc, NULL); | |
2047 | ||
28500291 | 2048 | drm_atomic_crtc_state_for_each_plane(plane, old_crtc_state) { |
6753ba97 JS |
2049 | const struct drm_plane_helper_funcs *plane_funcs = |
2050 | plane->helper_private; | |
2051 | ||
28500291 | 2052 | if (!plane_funcs) |
6753ba97 JS |
2053 | continue; |
2054 | ||
2055 | WARN_ON(!plane_funcs->atomic_disable); | |
2056 | if (plane_funcs->atomic_disable) | |
2057 | plane_funcs->atomic_disable(plane, NULL); | |
2058 | } | |
2059 | ||
2060 | if (atomic && crtc_funcs && crtc_funcs->atomic_flush) | |
2061 | crtc_funcs->atomic_flush(crtc, NULL); | |
2062 | } | |
2063 | EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); | |
2064 | ||
c2fcd274 DV |
2065 | /** |
2066 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
2067 | * @dev: DRM device | |
2068 | * @old_state: atomic state object with old state structures | |
2069 | * | |
2070 | * This function cleans up plane state, specifically framebuffers, from the old | |
2071 | * configuration. Hence the old configuration must be perserved in @old_state to | |
2072 | * be able to call this function. | |
2073 | * | |
2074 | * This function must also be called on the new state when the atomic update | |
2075 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
2076 | */ | |
2077 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
2078 | struct drm_atomic_state *old_state) | |
2079 | { | |
df63b999 | 2080 | struct drm_plane *plane; |
415c3ac3 | 2081 | struct drm_plane_state *old_plane_state, *new_plane_state; |
c2fcd274 DV |
2082 | int i; |
2083 | ||
415c3ac3 | 2084 | for_each_oldnew_plane_in_state(old_state, plane, old_plane_state, new_plane_state, i) { |
b5ceff20 | 2085 | const struct drm_plane_helper_funcs *funcs; |
415c3ac3 ML |
2086 | struct drm_plane_state *plane_state; |
2087 | ||
2088 | /* | |
2089 | * This might be called before swapping when commit is aborted, | |
2090 | * in which case we have to cleanup the new state. | |
2091 | */ | |
2092 | if (old_plane_state == plane->state) | |
2093 | plane_state = new_plane_state; | |
2094 | else | |
2095 | plane_state = old_plane_state; | |
c2fcd274 | 2096 | |
c2fcd274 DV |
2097 | funcs = plane->helper_private; |
2098 | ||
844f9111 ML |
2099 | if (funcs->cleanup_fb) |
2100 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
2101 | } |
2102 | } | |
2103 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
2104 | ||
2105 | /** | |
2106 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
c2fcd274 | 2107 | * @state: atomic state |
5e84c269 | 2108 | * @stall: stall for proceeding commits |
c2fcd274 DV |
2109 | * |
2110 | * This function stores the atomic state into the current state pointers in all | |
2111 | * driver objects. It should be called after all failing steps have been done | |
2112 | * and succeeded, but before the actual hardware state is committed. | |
2113 | * | |
2114 | * For cleanup and error recovery the current state for all changed objects will | |
2115 | * be swaped into @state. | |
2116 | * | |
2117 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
2118 | * | |
2119 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
2120 | * | |
2121 | * 2. Do any other steps that might fail. | |
2122 | * | |
2123 | * 3. Put the staged state into the current state pointers with this function. | |
2124 | * | |
2125 | * 4. Actually commit the hardware state. | |
2126 | * | |
26196f7e | 2127 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
c2fcd274 | 2128 | * contains the old state. Also do any other cleanup required with that state. |
a095caa7 DV |
2129 | * |
2130 | * @stall must be set when nonblocking commits for this driver directly access | |
6806cdf9 DV |
2131 | * the &drm_plane.state, &drm_crtc.state or &drm_connector.state pointer. With |
2132 | * the current atomic helpers this is almost always the case, since the helpers | |
a095caa7 | 2133 | * don't pass the right state structures to the callbacks. |
c2fcd274 | 2134 | */ |
5e84c269 DV |
2135 | void drm_atomic_helper_swap_state(struct drm_atomic_state *state, |
2136 | bool stall) | |
c2fcd274 DV |
2137 | { |
2138 | int i; | |
a095caa7 | 2139 | long ret; |
be9174a4 | 2140 | struct drm_connector *connector; |
415c3ac3 | 2141 | struct drm_connector_state *old_conn_state, *new_conn_state; |
be9174a4 | 2142 | struct drm_crtc *crtc; |
415c3ac3 | 2143 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
be9174a4 | 2144 | struct drm_plane *plane; |
415c3ac3 | 2145 | struct drm_plane_state *old_plane_state, *new_plane_state; |
a095caa7 | 2146 | struct drm_crtc_commit *commit; |
b430c27a PD |
2147 | void *obj, *obj_state; |
2148 | const struct drm_private_state_funcs *funcs; | |
a095caa7 DV |
2149 | |
2150 | if (stall) { | |
415c3ac3 | 2151 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
a095caa7 DV |
2152 | spin_lock(&crtc->commit_lock); |
2153 | commit = list_first_entry_or_null(&crtc->commit_list, | |
2154 | struct drm_crtc_commit, commit_entry); | |
2155 | if (commit) | |
2156 | drm_crtc_commit_get(commit); | |
2157 | spin_unlock(&crtc->commit_lock); | |
2158 | ||
2159 | if (!commit) | |
2160 | continue; | |
2161 | ||
2162 | ret = wait_for_completion_timeout(&commit->hw_done, | |
2163 | 10*HZ); | |
2164 | if (ret == 0) | |
2165 | DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n", | |
2166 | crtc->base.id, crtc->name); | |
2167 | drm_crtc_commit_put(commit); | |
2168 | } | |
2169 | } | |
c2fcd274 | 2170 | |
415c3ac3 | 2171 | for_each_oldnew_connector_in_state(state, connector, old_conn_state, new_conn_state, i) { |
581e49fe ML |
2172 | WARN_ON(connector->state != old_conn_state); |
2173 | ||
415c3ac3 ML |
2174 | old_conn_state->state = state; |
2175 | new_conn_state->state = NULL; | |
2176 | ||
2177 | state->connectors[i].state = old_conn_state; | |
2178 | connector->state = new_conn_state; | |
c2fcd274 DV |
2179 | } |
2180 | ||
415c3ac3 | 2181 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
581e49fe ML |
2182 | WARN_ON(crtc->state != old_crtc_state); |
2183 | ||
415c3ac3 ML |
2184 | old_crtc_state->state = state; |
2185 | new_crtc_state->state = NULL; | |
2186 | ||
2187 | state->crtcs[i].state = old_crtc_state; | |
2188 | crtc->state = new_crtc_state; | |
a095caa7 DV |
2189 | |
2190 | if (state->crtcs[i].commit) { | |
2191 | spin_lock(&crtc->commit_lock); | |
2192 | list_add(&state->crtcs[i].commit->commit_entry, | |
2193 | &crtc->commit_list); | |
2194 | spin_unlock(&crtc->commit_lock); | |
2195 | ||
2196 | state->crtcs[i].commit->event = NULL; | |
2197 | } | |
c2fcd274 DV |
2198 | } |
2199 | ||
415c3ac3 | 2200 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { |
581e49fe ML |
2201 | WARN_ON(plane->state != old_plane_state); |
2202 | ||
415c3ac3 ML |
2203 | old_plane_state->state = state; |
2204 | new_plane_state->state = NULL; | |
2205 | ||
2206 | state->planes[i].state = old_plane_state; | |
2207 | plane->state = new_plane_state; | |
c2fcd274 | 2208 | } |
b430c27a PD |
2209 | |
2210 | __for_each_private_obj(state, obj, obj_state, i, funcs) | |
2211 | funcs->swap_state(obj, &state->private_objs[i].obj_state); | |
c2fcd274 DV |
2212 | } |
2213 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
2214 | |
2215 | /** | |
2216 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
2217 | * @plane: plane object to update | |
2218 | * @crtc: owning CRTC of owning plane | |
2219 | * @fb: framebuffer to flip onto plane | |
2220 | * @crtc_x: x offset of primary plane on crtc | |
2221 | * @crtc_y: y offset of primary plane on crtc | |
2222 | * @crtc_w: width of primary plane rectangle on crtc | |
2223 | * @crtc_h: height of primary plane rectangle on crtc | |
2224 | * @src_x: x offset of @fb for panning | |
2225 | * @src_y: y offset of @fb for panning | |
2226 | * @src_w: width of source rectangle in @fb | |
2227 | * @src_h: height of source rectangle in @fb | |
34a2ab5e | 2228 | * @ctx: lock acquire context |
042652ed DV |
2229 | * |
2230 | * Provides a default plane update handler using the atomic driver interface. | |
2231 | * | |
2232 | * RETURNS: | |
2233 | * Zero on success, error code on failure | |
2234 | */ | |
2235 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
2236 | struct drm_crtc *crtc, | |
2237 | struct drm_framebuffer *fb, | |
2238 | int crtc_x, int crtc_y, | |
2239 | unsigned int crtc_w, unsigned int crtc_h, | |
2240 | uint32_t src_x, uint32_t src_y, | |
34a2ab5e DV |
2241 | uint32_t src_w, uint32_t src_h, |
2242 | struct drm_modeset_acquire_ctx *ctx) | |
042652ed DV |
2243 | { |
2244 | struct drm_atomic_state *state; | |
2245 | struct drm_plane_state *plane_state; | |
2246 | int ret = 0; | |
2247 | ||
2248 | state = drm_atomic_state_alloc(plane->dev); | |
2249 | if (!state) | |
2250 | return -ENOMEM; | |
2251 | ||
d26f96c7 | 2252 | state->acquire_ctx = ctx; |
042652ed DV |
2253 | plane_state = drm_atomic_get_plane_state(state, plane); |
2254 | if (IS_ERR(plane_state)) { | |
2255 | ret = PTR_ERR(plane_state); | |
2256 | goto fail; | |
2257 | } | |
2258 | ||
07cc0ef6 | 2259 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
2260 | if (ret != 0) |
2261 | goto fail; | |
321ebf04 | 2262 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
2263 | plane_state->crtc_x = crtc_x; |
2264 | plane_state->crtc_y = crtc_y; | |
042652ed | 2265 | plane_state->crtc_w = crtc_w; |
02e6f379 | 2266 | plane_state->crtc_h = crtc_h; |
042652ed DV |
2267 | plane_state->src_x = src_x; |
2268 | plane_state->src_y = src_y; | |
042652ed | 2269 | plane_state->src_w = src_w; |
02e6f379 | 2270 | plane_state->src_h = src_h; |
042652ed | 2271 | |
3671c580 DV |
2272 | if (plane == crtc->cursor) |
2273 | state->legacy_cursor_update = true; | |
2274 | ||
042652ed | 2275 | ret = drm_atomic_commit(state); |
042652ed | 2276 | fail: |
0853695c | 2277 | drm_atomic_state_put(state); |
042652ed | 2278 | return ret; |
042652ed DV |
2279 | } |
2280 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
2281 | ||
2282 | /** | |
2283 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
2284 | * @plane: plane to disable | |
19315294 | 2285 | * @ctx: lock acquire context |
042652ed DV |
2286 | * |
2287 | * Provides a default plane disable handler using the atomic driver interface. | |
2288 | * | |
2289 | * RETURNS: | |
2290 | * Zero on success, error code on failure | |
2291 | */ | |
19315294 DV |
2292 | int drm_atomic_helper_disable_plane(struct drm_plane *plane, |
2293 | struct drm_modeset_acquire_ctx *ctx) | |
042652ed DV |
2294 | { |
2295 | struct drm_atomic_state *state; | |
2296 | struct drm_plane_state *plane_state; | |
2297 | int ret = 0; | |
2298 | ||
2299 | state = drm_atomic_state_alloc(plane->dev); | |
2300 | if (!state) | |
2301 | return -ENOMEM; | |
2302 | ||
d26f96c7 | 2303 | state->acquire_ctx = ctx; |
042652ed DV |
2304 | plane_state = drm_atomic_get_plane_state(state, plane); |
2305 | if (IS_ERR(plane_state)) { | |
2306 | ret = PTR_ERR(plane_state); | |
2307 | goto fail; | |
2308 | } | |
2309 | ||
24e79d0d ML |
2310 | if (plane_state->crtc && (plane == plane->crtc->cursor)) |
2311 | plane_state->state->legacy_cursor_update = true; | |
2312 | ||
bbb1e524 | 2313 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
042652ed DV |
2314 | if (ret != 0) |
2315 | goto fail; | |
f02ad907 | 2316 | |
042652ed | 2317 | ret = drm_atomic_commit(state); |
042652ed | 2318 | fail: |
0853695c | 2319 | drm_atomic_state_put(state); |
042652ed | 2320 | return ret; |
042652ed DV |
2321 | } |
2322 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
2323 | ||
bbb1e524 RC |
2324 | /* just used from fb-helper and atomic-helper: */ |
2325 | int __drm_atomic_helper_disable_plane(struct drm_plane *plane, | |
2326 | struct drm_plane_state *plane_state) | |
2327 | { | |
2328 | int ret; | |
2329 | ||
2330 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
2331 | if (ret != 0) | |
2332 | return ret; | |
2333 | ||
2334 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
2335 | plane_state->crtc_x = 0; | |
2336 | plane_state->crtc_y = 0; | |
bbb1e524 | 2337 | plane_state->crtc_w = 0; |
02e6f379 | 2338 | plane_state->crtc_h = 0; |
bbb1e524 RC |
2339 | plane_state->src_x = 0; |
2340 | plane_state->src_y = 0; | |
bbb1e524 | 2341 | plane_state->src_w = 0; |
02e6f379 | 2342 | plane_state->src_h = 0; |
bbb1e524 | 2343 | |
bbb1e524 RC |
2344 | return 0; |
2345 | } | |
2346 | ||
042652ed DV |
2347 | static int update_output_state(struct drm_atomic_state *state, |
2348 | struct drm_mode_set *set) | |
2349 | { | |
2350 | struct drm_device *dev = set->crtc->dev; | |
df63b999 | 2351 | struct drm_crtc *crtc; |
415c3ac3 | 2352 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 2353 | struct drm_connector *connector; |
415c3ac3 | 2354 | struct drm_connector_state *new_conn_state; |
6ab520a2 | 2355 | int ret, i; |
042652ed DV |
2356 | |
2357 | ret = drm_modeset_lock(&dev->mode_config.connection_mutex, | |
2358 | state->acquire_ctx); | |
2359 | if (ret) | |
2360 | return ret; | |
2361 | ||
6ab520a2 ML |
2362 | /* First disable all connectors on the target crtc. */ |
2363 | ret = drm_atomic_add_affected_connectors(state, set->crtc); | |
2364 | if (ret) | |
2365 | return ret; | |
042652ed | 2366 | |
415c3ac3 ML |
2367 | for_each_new_connector_in_state(state, connector, new_conn_state, i) { |
2368 | if (new_conn_state->crtc == set->crtc) { | |
2369 | ret = drm_atomic_set_crtc_for_connector(new_conn_state, | |
042652ed DV |
2370 | NULL); |
2371 | if (ret) | |
2372 | return ret; | |
415c3ac3 | 2373 | |
40ee6fbe | 2374 | /* Make sure legacy setCrtc always re-trains */ |
415c3ac3 | 2375 | new_conn_state->link_status = DRM_LINK_STATUS_GOOD; |
042652ed | 2376 | } |
6ab520a2 | 2377 | } |
042652ed | 2378 | |
6ab520a2 ML |
2379 | /* Then set all connectors from set->connectors on the target crtc */ |
2380 | for (i = 0; i < set->num_connectors; i++) { | |
415c3ac3 | 2381 | new_conn_state = drm_atomic_get_connector_state(state, |
6ab520a2 | 2382 | set->connectors[i]); |
415c3ac3 ML |
2383 | if (IS_ERR(new_conn_state)) |
2384 | return PTR_ERR(new_conn_state); | |
6ab520a2 | 2385 | |
415c3ac3 | 2386 | ret = drm_atomic_set_crtc_for_connector(new_conn_state, |
6ab520a2 ML |
2387 | set->crtc); |
2388 | if (ret) | |
2389 | return ret; | |
042652ed DV |
2390 | } |
2391 | ||
415c3ac3 | 2392 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
042652ed DV |
2393 | /* Don't update ->enable for the CRTC in the set_config request, |
2394 | * since a mismatch would indicate a bug in the upper layers. | |
2395 | * The actual modeset code later on will catch any | |
2396 | * inconsistencies here. */ | |
2397 | if (crtc == set->crtc) | |
2398 | continue; | |
2399 | ||
415c3ac3 ML |
2400 | if (!new_crtc_state->connector_mask) { |
2401 | ret = drm_atomic_set_mode_prop_for_crtc(new_crtc_state, | |
c30f55a7 LP |
2402 | NULL); |
2403 | if (ret < 0) | |
2404 | return ret; | |
2405 | ||
415c3ac3 | 2406 | new_crtc_state->active = false; |
c30f55a7 | 2407 | } |
042652ed DV |
2408 | } |
2409 | ||
2410 | return 0; | |
2411 | } | |
2412 | ||
2413 | /** | |
2414 | * drm_atomic_helper_set_config - set a new config from userspace | |
2415 | * @set: mode set configuration | |
a4eff9aa | 2416 | * @ctx: lock acquisition context |
042652ed DV |
2417 | * |
2418 | * Provides a default crtc set_config handler using the atomic driver interface. | |
2419 | * | |
40ee6fbe MN |
2420 | * NOTE: For backwards compatibility with old userspace this automatically |
2421 | * resets the "link-status" property to GOOD, to force any link | |
2422 | * re-training. The SETCRTC ioctl does not define whether an update does | |
2423 | * need a full modeset or just a plane update, hence we're allowed to do | |
2424 | * that. See also drm_mode_connector_set_link_status_property(). | |
2425 | * | |
042652ed DV |
2426 | * Returns: |
2427 | * Returns 0 on success, negative errno numbers on failure. | |
2428 | */ | |
a4eff9aa DV |
2429 | int drm_atomic_helper_set_config(struct drm_mode_set *set, |
2430 | struct drm_modeset_acquire_ctx *ctx) | |
042652ed DV |
2431 | { |
2432 | struct drm_atomic_state *state; | |
2433 | struct drm_crtc *crtc = set->crtc; | |
042652ed DV |
2434 | int ret = 0; |
2435 | ||
2436 | state = drm_atomic_state_alloc(crtc->dev); | |
2437 | if (!state) | |
2438 | return -ENOMEM; | |
2439 | ||
38b6441e | 2440 | state->acquire_ctx = ctx; |
bbb1e524 RC |
2441 | ret = __drm_atomic_helper_set_config(set, state); |
2442 | if (ret != 0) | |
1fa4da04 | 2443 | goto fail; |
042652ed | 2444 | |
44596b8c ML |
2445 | ret = handle_conflicting_encoders(state, true); |
2446 | if (ret) | |
2447 | return ret; | |
2448 | ||
bbb1e524 | 2449 | ret = drm_atomic_commit(state); |
bbb1e524 | 2450 | |
1fa4da04 | 2451 | fail: |
0853695c | 2452 | drm_atomic_state_put(state); |
bbb1e524 | 2453 | return ret; |
bbb1e524 RC |
2454 | } |
2455 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
2456 | ||
2457 | /* just used from fb-helper and atomic-helper: */ | |
2458 | int __drm_atomic_helper_set_config(struct drm_mode_set *set, | |
2459 | struct drm_atomic_state *state) | |
2460 | { | |
2461 | struct drm_crtc_state *crtc_state; | |
2462 | struct drm_plane_state *primary_state; | |
2463 | struct drm_crtc *crtc = set->crtc; | |
83926117 | 2464 | int hdisplay, vdisplay; |
bbb1e524 RC |
2465 | int ret; |
2466 | ||
2467 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2468 | if (IS_ERR(crtc_state)) | |
2469 | return PTR_ERR(crtc_state); | |
2470 | ||
2471 | primary_state = drm_atomic_get_plane_state(state, crtc->primary); | |
2472 | if (IS_ERR(primary_state)) | |
2473 | return PTR_ERR(primary_state); | |
e5b5341c | 2474 | |
042652ed DV |
2475 | if (!set->mode) { |
2476 | WARN_ON(set->fb); | |
2477 | WARN_ON(set->num_connectors); | |
2478 | ||
819364da DS |
2479 | ret = drm_atomic_set_mode_for_crtc(crtc_state, NULL); |
2480 | if (ret != 0) | |
bbb1e524 | 2481 | return ret; |
819364da | 2482 | |
eab3bbef | 2483 | crtc_state->active = false; |
e5b5341c | 2484 | |
07cc0ef6 | 2485 | ret = drm_atomic_set_crtc_for_plane(primary_state, NULL); |
e5b5341c | 2486 | if (ret != 0) |
bbb1e524 | 2487 | return ret; |
e5b5341c RC |
2488 | |
2489 | drm_atomic_set_fb_for_plane(primary_state, NULL); | |
2490 | ||
042652ed DV |
2491 | goto commit; |
2492 | } | |
2493 | ||
2494 | WARN_ON(!set->fb); | |
2495 | WARN_ON(!set->num_connectors); | |
2496 | ||
819364da DS |
2497 | ret = drm_atomic_set_mode_for_crtc(crtc_state, set->mode); |
2498 | if (ret != 0) | |
bbb1e524 | 2499 | return ret; |
819364da | 2500 | |
eab3bbef | 2501 | crtc_state->active = true; |
042652ed | 2502 | |
07cc0ef6 | 2503 | ret = drm_atomic_set_crtc_for_plane(primary_state, crtc); |
042652ed | 2504 | if (ret != 0) |
bbb1e524 RC |
2505 | return ret; |
2506 | ||
196cd5d3 | 2507 | drm_mode_get_hv_timing(set->mode, &hdisplay, &vdisplay); |
83926117 | 2508 | |
321ebf04 | 2509 | drm_atomic_set_fb_for_plane(primary_state, set->fb); |
042652ed DV |
2510 | primary_state->crtc_x = 0; |
2511 | primary_state->crtc_y = 0; | |
83926117 | 2512 | primary_state->crtc_w = hdisplay; |
02e6f379 | 2513 | primary_state->crtc_h = vdisplay; |
042652ed DV |
2514 | primary_state->src_x = set->x << 16; |
2515 | primary_state->src_y = set->y << 16; | |
bd2ef25d | 2516 | if (drm_rotation_90_or_270(primary_state->rotation)) { |
83926117 | 2517 | primary_state->src_w = vdisplay << 16; |
02e6f379 | 2518 | primary_state->src_h = hdisplay << 16; |
41121248 | 2519 | } else { |
83926117 | 2520 | primary_state->src_w = hdisplay << 16; |
02e6f379 | 2521 | primary_state->src_h = vdisplay << 16; |
41121248 | 2522 | } |
042652ed DV |
2523 | |
2524 | commit: | |
2525 | ret = update_output_state(state, set); | |
2526 | if (ret) | |
bbb1e524 | 2527 | return ret; |
042652ed | 2528 | |
042652ed | 2529 | return 0; |
042652ed | 2530 | } |
042652ed | 2531 | |
14942760 TR |
2532 | /** |
2533 | * drm_atomic_helper_disable_all - disable all currently active outputs | |
2534 | * @dev: DRM device | |
2535 | * @ctx: lock acquisition context | |
2536 | * | |
2537 | * Loops through all connectors, finding those that aren't turned off and then | |
2538 | * turns them off by setting their DPMS mode to OFF and deactivating the CRTC | |
2539 | * that they are connected to. | |
2540 | * | |
2541 | * This is used for example in suspend/resume to disable all currently active | |
18dddadc DV |
2542 | * functions when suspending. If you just want to shut down everything at e.g. |
2543 | * driver unload, look at drm_atomic_helper_shutdown(). | |
14942760 TR |
2544 | * |
2545 | * Note that if callers haven't already acquired all modeset locks this might | |
2546 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
2547 | * | |
2548 | * Returns: | |
2549 | * 0 on success or a negative error code on failure. | |
2550 | * | |
2551 | * See also: | |
18dddadc DV |
2552 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() and |
2553 | * drm_atomic_helper_shutdown(). | |
14942760 TR |
2554 | */ |
2555 | int drm_atomic_helper_disable_all(struct drm_device *dev, | |
2556 | struct drm_modeset_acquire_ctx *ctx) | |
2557 | { | |
2558 | struct drm_atomic_state *state; | |
9b2104f4 | 2559 | struct drm_connector_state *conn_state; |
14942760 | 2560 | struct drm_connector *conn; |
9b2104f4 ML |
2561 | struct drm_plane_state *plane_state; |
2562 | struct drm_plane *plane; | |
2563 | struct drm_crtc_state *crtc_state; | |
2564 | struct drm_crtc *crtc; | |
2565 | int ret, i; | |
14942760 TR |
2566 | |
2567 | state = drm_atomic_state_alloc(dev); | |
2568 | if (!state) | |
2569 | return -ENOMEM; | |
2570 | ||
2571 | state->acquire_ctx = ctx; | |
2572 | ||
9b2104f4 | 2573 | drm_for_each_crtc(crtc, dev) { |
14942760 TR |
2574 | crtc_state = drm_atomic_get_crtc_state(state, crtc); |
2575 | if (IS_ERR(crtc_state)) { | |
9b2104f4 | 2576 | ret = PTR_ERR(crtc_state); |
14942760 TR |
2577 | goto free; |
2578 | } | |
2579 | ||
2580 | crtc_state->active = false; | |
9b2104f4 ML |
2581 | |
2582 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, NULL); | |
2583 | if (ret < 0) | |
2584 | goto free; | |
2585 | ||
2586 | ret = drm_atomic_add_affected_planes(state, crtc); | |
2587 | if (ret < 0) | |
2588 | goto free; | |
2589 | ||
2590 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
2591 | if (ret < 0) | |
2592 | goto free; | |
2593 | } | |
2594 | ||
2595 | for_each_connector_in_state(state, conn, conn_state, i) { | |
2596 | ret = drm_atomic_set_crtc_for_connector(conn_state, NULL); | |
2597 | if (ret < 0) | |
2598 | goto free; | |
2599 | } | |
2600 | ||
2601 | for_each_plane_in_state(state, plane, plane_state, i) { | |
2602 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); | |
2603 | if (ret < 0) | |
2604 | goto free; | |
2605 | ||
2606 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
14942760 TR |
2607 | } |
2608 | ||
9b2104f4 | 2609 | ret = drm_atomic_commit(state); |
14942760 | 2610 | free: |
0853695c | 2611 | drm_atomic_state_put(state); |
9b2104f4 | 2612 | return ret; |
14942760 | 2613 | } |
9b2104f4 | 2614 | |
14942760 TR |
2615 | EXPORT_SYMBOL(drm_atomic_helper_disable_all); |
2616 | ||
18dddadc DV |
2617 | /** |
2618 | * drm_atomic_helper_shutdown - shutdown all CRTC | |
2619 | * @dev: DRM device | |
2620 | * | |
2621 | * This shuts down all CRTC, which is useful for driver unloading. Shutdown on | |
2622 | * suspend should instead be handled with drm_atomic_helper_suspend(), since | |
2623 | * that also takes a snapshot of the modeset state to be restored on resume. | |
2624 | * | |
2625 | * This is just a convenience wrapper around drm_atomic_helper_disable_all(), | |
2626 | * and it is the atomic version of drm_crtc_force_disable_all(). | |
2627 | */ | |
2628 | void drm_atomic_helper_shutdown(struct drm_device *dev) | |
2629 | { | |
2630 | struct drm_modeset_acquire_ctx ctx; | |
2631 | int ret; | |
2632 | ||
2633 | drm_modeset_acquire_init(&ctx, 0); | |
2634 | while (1) { | |
2635 | ret = drm_modeset_lock_all_ctx(dev, &ctx); | |
2636 | if (!ret) | |
2637 | ret = drm_atomic_helper_disable_all(dev, &ctx); | |
2638 | ||
2639 | if (ret != -EDEADLK) | |
2640 | break; | |
2641 | ||
2642 | drm_modeset_backoff(&ctx); | |
2643 | } | |
2644 | ||
2645 | if (ret) | |
2646 | DRM_ERROR("Disabling all crtc's during unload failed with %i\n", ret); | |
2647 | ||
2648 | drm_modeset_drop_locks(&ctx); | |
2649 | drm_modeset_acquire_fini(&ctx); | |
2650 | } | |
2651 | EXPORT_SYMBOL(drm_atomic_helper_shutdown); | |
2652 | ||
14942760 TR |
2653 | /** |
2654 | * drm_atomic_helper_suspend - subsystem-level suspend helper | |
2655 | * @dev: DRM device | |
2656 | * | |
2657 | * Duplicates the current atomic state, disables all active outputs and then | |
2658 | * returns a pointer to the original atomic state to the caller. Drivers can | |
2659 | * pass this pointer to the drm_atomic_helper_resume() helper upon resume to | |
2660 | * restore the output configuration that was active at the time the system | |
2661 | * entered suspend. | |
2662 | * | |
2663 | * Note that it is potentially unsafe to use this. The atomic state object | |
2664 | * returned by this function is assumed to be persistent. Drivers must ensure | |
2665 | * that this holds true. Before calling this function, drivers must make sure | |
2666 | * to suspend fbdev emulation so that nothing can be using the device. | |
2667 | * | |
2668 | * Returns: | |
2669 | * A pointer to a copy of the state before suspend on success or an ERR_PTR()- | |
2670 | * encoded error code on failure. Drivers should store the returned atomic | |
2671 | * state object and pass it to the drm_atomic_helper_resume() helper upon | |
2672 | * resume. | |
2673 | * | |
2674 | * See also: | |
2675 | * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), | |
581e49fe | 2676 | * drm_atomic_helper_resume(), drm_atomic_helper_commit_duplicated_state() |
14942760 TR |
2677 | */ |
2678 | struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) | |
2679 | { | |
2680 | struct drm_modeset_acquire_ctx ctx; | |
2681 | struct drm_atomic_state *state; | |
2682 | int err; | |
2683 | ||
2684 | drm_modeset_acquire_init(&ctx, 0); | |
2685 | ||
2686 | retry: | |
2687 | err = drm_modeset_lock_all_ctx(dev, &ctx); | |
2688 | if (err < 0) { | |
2689 | state = ERR_PTR(err); | |
2690 | goto unlock; | |
2691 | } | |
2692 | ||
2693 | state = drm_atomic_helper_duplicate_state(dev, &ctx); | |
2694 | if (IS_ERR(state)) | |
2695 | goto unlock; | |
2696 | ||
2697 | err = drm_atomic_helper_disable_all(dev, &ctx); | |
2698 | if (err < 0) { | |
0853695c | 2699 | drm_atomic_state_put(state); |
14942760 TR |
2700 | state = ERR_PTR(err); |
2701 | goto unlock; | |
2702 | } | |
2703 | ||
2704 | unlock: | |
2705 | if (PTR_ERR(state) == -EDEADLK) { | |
2706 | drm_modeset_backoff(&ctx); | |
2707 | goto retry; | |
2708 | } | |
2709 | ||
2710 | drm_modeset_drop_locks(&ctx); | |
2711 | drm_modeset_acquire_fini(&ctx); | |
2712 | return state; | |
2713 | } | |
2714 | EXPORT_SYMBOL(drm_atomic_helper_suspend); | |
2715 | ||
581e49fe ML |
2716 | /** |
2717 | * drm_atomic_helper_commit_duplicated_state - commit duplicated state | |
2718 | * @state: duplicated atomic state to commit | |
2719 | * @ctx: pointer to acquire_ctx to use for commit. | |
2720 | * | |
2721 | * The state returned by drm_atomic_helper_duplicate_state() and | |
2722 | * drm_atomic_helper_suspend() is partially invalid, and needs to | |
2723 | * be fixed up before commit. | |
2724 | * | |
2725 | * Returns: | |
2726 | * 0 on success or a negative error code on failure. | |
2727 | * | |
2728 | * See also: | |
2729 | * drm_atomic_helper_suspend() | |
2730 | */ | |
2731 | int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state, | |
2732 | struct drm_modeset_acquire_ctx *ctx) | |
2733 | { | |
2734 | int i; | |
2735 | struct drm_plane *plane; | |
415c3ac3 | 2736 | struct drm_plane_state *new_plane_state; |
581e49fe | 2737 | struct drm_connector *connector; |
415c3ac3 | 2738 | struct drm_connector_state *new_conn_state; |
581e49fe | 2739 | struct drm_crtc *crtc; |
415c3ac3 | 2740 | struct drm_crtc_state *new_crtc_state; |
581e49fe ML |
2741 | |
2742 | state->acquire_ctx = ctx; | |
2743 | ||
415c3ac3 | 2744 | for_each_new_plane_in_state(state, plane, new_plane_state, i) |
581e49fe ML |
2745 | state->planes[i].old_state = plane->state; |
2746 | ||
415c3ac3 | 2747 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) |
581e49fe ML |
2748 | state->crtcs[i].old_state = crtc->state; |
2749 | ||
415c3ac3 | 2750 | for_each_new_connector_in_state(state, connector, new_conn_state, i) |
581e49fe ML |
2751 | state->connectors[i].old_state = connector->state; |
2752 | ||
2753 | return drm_atomic_commit(state); | |
2754 | } | |
2755 | EXPORT_SYMBOL(drm_atomic_helper_commit_duplicated_state); | |
2756 | ||
14942760 TR |
2757 | /** |
2758 | * drm_atomic_helper_resume - subsystem-level resume helper | |
2759 | * @dev: DRM device | |
2760 | * @state: atomic state to resume to | |
2761 | * | |
2762 | * Calls drm_mode_config_reset() to synchronize hardware and software states, | |
2763 | * grabs all modeset locks and commits the atomic state object. This can be | |
2764 | * used in conjunction with the drm_atomic_helper_suspend() helper to | |
2765 | * implement suspend/resume for drivers that support atomic mode-setting. | |
2766 | * | |
2767 | * Returns: | |
2768 | * 0 on success or a negative error code on failure. | |
2769 | * | |
2770 | * See also: | |
2771 | * drm_atomic_helper_suspend() | |
2772 | */ | |
2773 | int drm_atomic_helper_resume(struct drm_device *dev, | |
2774 | struct drm_atomic_state *state) | |
2775 | { | |
a5b8444e | 2776 | struct drm_modeset_acquire_ctx ctx; |
14942760 TR |
2777 | int err; |
2778 | ||
2779 | drm_mode_config_reset(dev); | |
581e49fe | 2780 | |
a5b8444e DV |
2781 | drm_modeset_acquire_init(&ctx, 0); |
2782 | while (1) { | |
869e188a DV |
2783 | err = drm_modeset_lock_all_ctx(dev, &ctx); |
2784 | if (err) | |
2785 | goto out; | |
2786 | ||
a5b8444e | 2787 | err = drm_atomic_helper_commit_duplicated_state(state, &ctx); |
869e188a | 2788 | out: |
a5b8444e DV |
2789 | if (err != -EDEADLK) |
2790 | break; | |
2791 | ||
2792 | drm_modeset_backoff(&ctx); | |
2793 | } | |
2794 | ||
2795 | drm_modeset_drop_locks(&ctx); | |
2796 | drm_modeset_acquire_fini(&ctx); | |
14942760 TR |
2797 | |
2798 | return err; | |
2799 | } | |
2800 | EXPORT_SYMBOL(drm_atomic_helper_resume); | |
2801 | ||
042652ed | 2802 | /** |
7f50002f | 2803 | * drm_atomic_helper_crtc_set_property - helper for crtc properties |
042652ed DV |
2804 | * @crtc: DRM crtc |
2805 | * @property: DRM property | |
2806 | * @val: value of property | |
2807 | * | |
7f50002f LP |
2808 | * Provides a default crtc set_property handler using the atomic driver |
2809 | * interface. | |
042652ed DV |
2810 | * |
2811 | * RETURNS: | |
2812 | * Zero on success, error code on failure | |
2813 | */ | |
2814 | int | |
2815 | drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc, | |
2816 | struct drm_property *property, | |
2817 | uint64_t val) | |
2818 | { | |
2819 | struct drm_atomic_state *state; | |
2820 | struct drm_crtc_state *crtc_state; | |
2821 | int ret = 0; | |
2822 | ||
2823 | state = drm_atomic_state_alloc(crtc->dev); | |
2824 | if (!state) | |
2825 | return -ENOMEM; | |
2826 | ||
2827 | /* ->set_property is always called with all locks held. */ | |
2828 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; | |
2829 | retry: | |
2830 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2831 | if (IS_ERR(crtc_state)) { | |
2832 | ret = PTR_ERR(crtc_state); | |
2833 | goto fail; | |
2834 | } | |
2835 | ||
40ecc694 RC |
2836 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, |
2837 | property, val); | |
042652ed DV |
2838 | if (ret) |
2839 | goto fail; | |
2840 | ||
2841 | ret = drm_atomic_commit(state); | |
042652ed DV |
2842 | fail: |
2843 | if (ret == -EDEADLK) | |
2844 | goto backoff; | |
2845 | ||
0853695c | 2846 | drm_atomic_state_put(state); |
042652ed | 2847 | return ret; |
0853695c | 2848 | |
042652ed | 2849 | backoff: |
042652ed | 2850 | drm_atomic_state_clear(state); |
6f75cea6 | 2851 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2852 | |
2853 | goto retry; | |
2854 | } | |
2855 | EXPORT_SYMBOL(drm_atomic_helper_crtc_set_property); | |
2856 | ||
2857 | /** | |
7f50002f | 2858 | * drm_atomic_helper_plane_set_property - helper for plane properties |
042652ed DV |
2859 | * @plane: DRM plane |
2860 | * @property: DRM property | |
2861 | * @val: value of property | |
2862 | * | |
7f50002f LP |
2863 | * Provides a default plane set_property handler using the atomic driver |
2864 | * interface. | |
042652ed DV |
2865 | * |
2866 | * RETURNS: | |
2867 | * Zero on success, error code on failure | |
2868 | */ | |
2869 | int | |
2870 | drm_atomic_helper_plane_set_property(struct drm_plane *plane, | |
2871 | struct drm_property *property, | |
2872 | uint64_t val) | |
2873 | { | |
2874 | struct drm_atomic_state *state; | |
2875 | struct drm_plane_state *plane_state; | |
2876 | int ret = 0; | |
2877 | ||
2878 | state = drm_atomic_state_alloc(plane->dev); | |
2879 | if (!state) | |
2880 | return -ENOMEM; | |
2881 | ||
2882 | /* ->set_property is always called with all locks held. */ | |
2883 | state->acquire_ctx = plane->dev->mode_config.acquire_ctx; | |
2884 | retry: | |
2885 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2886 | if (IS_ERR(plane_state)) { | |
2887 | ret = PTR_ERR(plane_state); | |
2888 | goto fail; | |
2889 | } | |
2890 | ||
40ecc694 RC |
2891 | ret = drm_atomic_plane_set_property(plane, plane_state, |
2892 | property, val); | |
042652ed DV |
2893 | if (ret) |
2894 | goto fail; | |
2895 | ||
2896 | ret = drm_atomic_commit(state); | |
042652ed DV |
2897 | fail: |
2898 | if (ret == -EDEADLK) | |
2899 | goto backoff; | |
2900 | ||
0853695c | 2901 | drm_atomic_state_put(state); |
042652ed | 2902 | return ret; |
0853695c | 2903 | |
042652ed | 2904 | backoff: |
042652ed | 2905 | drm_atomic_state_clear(state); |
6f75cea6 | 2906 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2907 | |
2908 | goto retry; | |
2909 | } | |
2910 | EXPORT_SYMBOL(drm_atomic_helper_plane_set_property); | |
2911 | ||
2912 | /** | |
7f50002f | 2913 | * drm_atomic_helper_connector_set_property - helper for connector properties |
042652ed DV |
2914 | * @connector: DRM connector |
2915 | * @property: DRM property | |
2916 | * @val: value of property | |
2917 | * | |
7f50002f LP |
2918 | * Provides a default connector set_property handler using the atomic driver |
2919 | * interface. | |
042652ed DV |
2920 | * |
2921 | * RETURNS: | |
2922 | * Zero on success, error code on failure | |
2923 | */ | |
2924 | int | |
2925 | drm_atomic_helper_connector_set_property(struct drm_connector *connector, | |
2926 | struct drm_property *property, | |
2927 | uint64_t val) | |
2928 | { | |
2929 | struct drm_atomic_state *state; | |
2930 | struct drm_connector_state *connector_state; | |
2931 | int ret = 0; | |
2932 | ||
2933 | state = drm_atomic_state_alloc(connector->dev); | |
2934 | if (!state) | |
2935 | return -ENOMEM; | |
2936 | ||
2937 | /* ->set_property is always called with all locks held. */ | |
2938 | state->acquire_ctx = connector->dev->mode_config.acquire_ctx; | |
2939 | retry: | |
2940 | connector_state = drm_atomic_get_connector_state(state, connector); | |
2941 | if (IS_ERR(connector_state)) { | |
2942 | ret = PTR_ERR(connector_state); | |
2943 | goto fail; | |
2944 | } | |
2945 | ||
40ecc694 RC |
2946 | ret = drm_atomic_connector_set_property(connector, connector_state, |
2947 | property, val); | |
042652ed DV |
2948 | if (ret) |
2949 | goto fail; | |
2950 | ||
2951 | ret = drm_atomic_commit(state); | |
042652ed DV |
2952 | fail: |
2953 | if (ret == -EDEADLK) | |
2954 | goto backoff; | |
2955 | ||
0853695c | 2956 | drm_atomic_state_put(state); |
042652ed | 2957 | return ret; |
0853695c | 2958 | |
042652ed | 2959 | backoff: |
042652ed | 2960 | drm_atomic_state_clear(state); |
6f75cea6 | 2961 | drm_atomic_legacy_backoff(state); |
042652ed DV |
2962 | |
2963 | goto retry; | |
2964 | } | |
2965 | EXPORT_SYMBOL(drm_atomic_helper_connector_set_property); | |
8bc0f312 | 2966 | |
f869a6ec AG |
2967 | static int page_flip_common( |
2968 | struct drm_atomic_state *state, | |
2969 | struct drm_crtc *crtc, | |
2970 | struct drm_framebuffer *fb, | |
6cbe5c46 AG |
2971 | struct drm_pending_vblank_event *event, |
2972 | uint32_t flags) | |
f869a6ec AG |
2973 | { |
2974 | struct drm_plane *plane = crtc->primary; | |
2975 | struct drm_plane_state *plane_state; | |
2976 | struct drm_crtc_state *crtc_state; | |
2977 | int ret = 0; | |
2978 | ||
2979 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
2980 | if (IS_ERR(crtc_state)) | |
2981 | return PTR_ERR(crtc_state); | |
2982 | ||
2983 | crtc_state->event = event; | |
6cbe5c46 | 2984 | crtc_state->pageflip_flags = flags; |
f869a6ec AG |
2985 | |
2986 | plane_state = drm_atomic_get_plane_state(state, plane); | |
2987 | if (IS_ERR(plane_state)) | |
2988 | return PTR_ERR(plane_state); | |
2989 | ||
f869a6ec AG |
2990 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
2991 | if (ret != 0) | |
2992 | return ret; | |
2993 | drm_atomic_set_fb_for_plane(plane_state, fb); | |
2994 | ||
2995 | /* Make sure we don't accidentally do a full modeset. */ | |
2996 | state->allow_modeset = false; | |
2997 | if (!crtc_state->active) { | |
6ac7c548 RK |
2998 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled, rejecting legacy flip\n", |
2999 | crtc->base.id, crtc->name); | |
f869a6ec AG |
3000 | return -EINVAL; |
3001 | } | |
3002 | ||
3003 | return ret; | |
3004 | } | |
3005 | ||
8bc0f312 DV |
3006 | /** |
3007 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
3008 | * @crtc: DRM crtc | |
3009 | * @fb: DRM framebuffer | |
3010 | * @event: optional DRM event to signal upon completion | |
3011 | * @flags: flip flags for non-vblank sync'ed updates | |
41292b1f | 3012 | * @ctx: lock acquisition context |
8bc0f312 | 3013 | * |
f869a6ec AG |
3014 | * Provides a default &drm_crtc_funcs.page_flip implementation |
3015 | * using the atomic driver interface. | |
8bc0f312 | 3016 | * |
8bc0f312 DV |
3017 | * Returns: |
3018 | * Returns 0 on success, negative errno numbers on failure. | |
f869a6ec AG |
3019 | * |
3020 | * See also: | |
3021 | * drm_atomic_helper_page_flip_target() | |
8bc0f312 DV |
3022 | */ |
3023 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
3024 | struct drm_framebuffer *fb, | |
3025 | struct drm_pending_vblank_event *event, | |
41292b1f DV |
3026 | uint32_t flags, |
3027 | struct drm_modeset_acquire_ctx *ctx) | |
8bc0f312 DV |
3028 | { |
3029 | struct drm_plane *plane = crtc->primary; | |
3030 | struct drm_atomic_state *state; | |
8bc0f312 DV |
3031 | int ret = 0; |
3032 | ||
8bc0f312 DV |
3033 | state = drm_atomic_state_alloc(plane->dev); |
3034 | if (!state) | |
3035 | return -ENOMEM; | |
3036 | ||
043e7fb6 | 3037 | state->acquire_ctx = ctx; |
f869a6ec | 3038 | |
6cbe5c46 | 3039 | ret = page_flip_common(state, crtc, fb, event, flags); |
f869a6ec | 3040 | if (ret != 0) |
8bc0f312 | 3041 | goto fail; |
8bc0f312 | 3042 | |
f869a6ec | 3043 | ret = drm_atomic_nonblocking_commit(state); |
f869a6ec | 3044 | fail: |
f869a6ec AG |
3045 | drm_atomic_state_put(state); |
3046 | return ret; | |
f869a6ec AG |
3047 | } |
3048 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
3049 | ||
3050 | /** | |
3051 | * drm_atomic_helper_page_flip_target - do page flip on target vblank period. | |
3052 | * @crtc: DRM crtc | |
3053 | * @fb: DRM framebuffer | |
3054 | * @event: optional DRM event to signal upon completion | |
3055 | * @flags: flip flags for non-vblank sync'ed updates | |
3056 | * @target: specifying the target vblank period when the flip to take effect | |
41292b1f | 3057 | * @ctx: lock acquisition context |
f869a6ec AG |
3058 | * |
3059 | * Provides a default &drm_crtc_funcs.page_flip_target implementation. | |
3060 | * Similar to drm_atomic_helper_page_flip() with extra parameter to specify | |
3061 | * target vblank period to flip. | |
3062 | * | |
3063 | * Returns: | |
3064 | * Returns 0 on success, negative errno numbers on failure. | |
3065 | */ | |
3066 | int drm_atomic_helper_page_flip_target( | |
3067 | struct drm_crtc *crtc, | |
3068 | struct drm_framebuffer *fb, | |
3069 | struct drm_pending_vblank_event *event, | |
3070 | uint32_t flags, | |
41292b1f DV |
3071 | uint32_t target, |
3072 | struct drm_modeset_acquire_ctx *ctx) | |
f869a6ec AG |
3073 | { |
3074 | struct drm_plane *plane = crtc->primary; | |
3075 | struct drm_atomic_state *state; | |
3076 | struct drm_crtc_state *crtc_state; | |
3077 | int ret = 0; | |
3078 | ||
f869a6ec AG |
3079 | state = drm_atomic_state_alloc(plane->dev); |
3080 | if (!state) | |
3081 | return -ENOMEM; | |
3082 | ||
043e7fb6 | 3083 | state->acquire_ctx = ctx; |
f869a6ec | 3084 | |
6cbe5c46 | 3085 | ret = page_flip_common(state, crtc, fb, event, flags); |
8bc0f312 DV |
3086 | if (ret != 0) |
3087 | goto fail; | |
8bc0f312 | 3088 | |
b4d93679 | 3089 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); |
f869a6ec | 3090 | if (WARN_ON(!crtc_state)) { |
4cba6850 DV |
3091 | ret = -EINVAL; |
3092 | goto fail; | |
3093 | } | |
f869a6ec | 3094 | crtc_state->target_vblank = target; |
4cba6850 | 3095 | |
b837ba0a | 3096 | ret = drm_atomic_nonblocking_commit(state); |
8bc0f312 | 3097 | fail: |
0853695c | 3098 | drm_atomic_state_put(state); |
8bc0f312 | 3099 | return ret; |
8bc0f312 | 3100 | } |
f869a6ec | 3101 | EXPORT_SYMBOL(drm_atomic_helper_page_flip_target); |
d461701c | 3102 | |
b486e0e6 DV |
3103 | /** |
3104 | * drm_atomic_helper_connector_dpms() - connector dpms helper implementation | |
3105 | * @connector: affected connector | |
3106 | * @mode: DPMS mode | |
3107 | * | |
3108 | * This is the main helper function provided by the atomic helper framework for | |
3109 | * implementing the legacy DPMS connector interface. It computes the new desired | |
6806cdf9 DV |
3110 | * &drm_crtc_state.active state for the corresponding CRTC (if the connector is |
3111 | * enabled) and updates it. | |
9a69a9ac ML |
3112 | * |
3113 | * Returns: | |
3114 | * Returns 0 on success, negative errno numbers on failure. | |
b486e0e6 | 3115 | */ |
9a69a9ac ML |
3116 | int drm_atomic_helper_connector_dpms(struct drm_connector *connector, |
3117 | int mode) | |
b486e0e6 DV |
3118 | { |
3119 | struct drm_mode_config *config = &connector->dev->mode_config; | |
3120 | struct drm_atomic_state *state; | |
3121 | struct drm_crtc_state *crtc_state; | |
3122 | struct drm_crtc *crtc; | |
3123 | struct drm_connector *tmp_connector; | |
c36a3254 | 3124 | struct drm_connector_list_iter conn_iter; |
b486e0e6 DV |
3125 | int ret; |
3126 | bool active = false; | |
9a69a9ac | 3127 | int old_mode = connector->dpms; |
b486e0e6 DV |
3128 | |
3129 | if (mode != DRM_MODE_DPMS_ON) | |
3130 | mode = DRM_MODE_DPMS_OFF; | |
3131 | ||
3132 | connector->dpms = mode; | |
3133 | crtc = connector->state->crtc; | |
3134 | ||
3135 | if (!crtc) | |
9a69a9ac | 3136 | return 0; |
b486e0e6 | 3137 | |
b486e0e6 DV |
3138 | state = drm_atomic_state_alloc(connector->dev); |
3139 | if (!state) | |
9a69a9ac | 3140 | return -ENOMEM; |
b486e0e6 | 3141 | |
b260ac3e | 3142 | state->acquire_ctx = crtc->dev->mode_config.acquire_ctx; |
b486e0e6 DV |
3143 | retry: |
3144 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
9a69a9ac ML |
3145 | if (IS_ERR(crtc_state)) { |
3146 | ret = PTR_ERR(crtc_state); | |
3147 | goto fail; | |
3148 | } | |
b486e0e6 DV |
3149 | |
3150 | WARN_ON(!drm_modeset_is_locked(&config->connection_mutex)); | |
3151 | ||
b982dab1 | 3152 | drm_connector_list_iter_begin(connector->dev, &conn_iter); |
c36a3254 | 3153 | drm_for_each_connector_iter(tmp_connector, &conn_iter) { |
0388df05 | 3154 | if (tmp_connector->state->crtc != crtc) |
b486e0e6 DV |
3155 | continue; |
3156 | ||
0388df05 | 3157 | if (tmp_connector->dpms == DRM_MODE_DPMS_ON) { |
b486e0e6 DV |
3158 | active = true; |
3159 | break; | |
3160 | } | |
3161 | } | |
b982dab1 | 3162 | drm_connector_list_iter_end(&conn_iter); |
b486e0e6 DV |
3163 | crtc_state->active = active; |
3164 | ||
3165 | ret = drm_atomic_commit(state); | |
b486e0e6 DV |
3166 | fail: |
3167 | if (ret == -EDEADLK) | |
3168 | goto backoff; | |
8f5040e4 ML |
3169 | if (ret != 0) |
3170 | connector->dpms = old_mode; | |
0853695c | 3171 | drm_atomic_state_put(state); |
9a69a9ac | 3172 | return ret; |
0853695c | 3173 | |
b486e0e6 DV |
3174 | backoff: |
3175 | drm_atomic_state_clear(state); | |
3176 | drm_atomic_legacy_backoff(state); | |
3177 | ||
3178 | goto retry; | |
3179 | } | |
3180 | EXPORT_SYMBOL(drm_atomic_helper_connector_dpms); | |
3181 | ||
9ecb5498 | 3182 | /** |
6806cdf9 DV |
3183 | * drm_atomic_helper_best_encoder - Helper for |
3184 | * &drm_connector_helper_funcs.best_encoder callback | |
9ecb5498 NT |
3185 | * @connector: Connector control structure |
3186 | * | |
6806cdf9 | 3187 | * This is a &drm_connector_helper_funcs.best_encoder callback helper for |
9ecb5498 NT |
3188 | * connectors that support exactly 1 encoder, statically determined at driver |
3189 | * init time. | |
3190 | */ | |
3191 | struct drm_encoder * | |
3192 | drm_atomic_helper_best_encoder(struct drm_connector *connector) | |
3193 | { | |
3194 | WARN_ON(connector->encoder_ids[1]); | |
3195 | return drm_encoder_find(connector->dev, connector->encoder_ids[0]); | |
3196 | } | |
3197 | EXPORT_SYMBOL(drm_atomic_helper_best_encoder); | |
3198 | ||
3150c7d0 DV |
3199 | /** |
3200 | * DOC: atomic state reset and initialization | |
3201 | * | |
3202 | * Both the drm core and the atomic helpers assume that there is always the full | |
3203 | * and correct atomic software state for all connectors, CRTCs and planes | |
3204 | * available. Which is a bit a problem on driver load and also after system | |
3205 | * suspend. One way to solve this is to have a hardware state read-out | |
3206 | * infrastructure which reconstructs the full software state (e.g. the i915 | |
3207 | * driver). | |
3208 | * | |
3209 | * The simpler solution is to just reset the software state to everything off, | |
3210 | * which is easiest to do by calling drm_mode_config_reset(). To facilitate this | |
3211 | * the atomic helpers provide default reset implementations for all hooks. | |
7f8ee3e5 DV |
3212 | * |
3213 | * On the upside the precise state tracking of atomic simplifies system suspend | |
3214 | * and resume a lot. For drivers using drm_mode_config_reset() a complete recipe | |
3215 | * is implemented in drm_atomic_helper_suspend() and drm_atomic_helper_resume(). | |
3216 | * For other drivers the building blocks are split out, see the documentation | |
3217 | * for these functions. | |
3150c7d0 DV |
3218 | */ |
3219 | ||
d461701c | 3220 | /** |
6806cdf9 | 3221 | * drm_atomic_helper_crtc_reset - default &drm_crtc_funcs.reset hook for CRTCs |
d461701c DV |
3222 | * @crtc: drm CRTC |
3223 | * | |
3224 | * Resets the atomic state for @crtc by freeing the state pointer (which might | |
3225 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
3226 | */ | |
3227 | void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc) | |
3228 | { | |
b0b5511b | 3229 | if (crtc->state) |
ec2dc6a0 | 3230 | __drm_atomic_helper_crtc_destroy_state(crtc->state); |
b0b5511b | 3231 | |
d461701c DV |
3232 | kfree(crtc->state); |
3233 | crtc->state = kzalloc(sizeof(*crtc->state), GFP_KERNEL); | |
07cc0ef6 DV |
3234 | |
3235 | if (crtc->state) | |
3236 | crtc->state->crtc = crtc; | |
d461701c DV |
3237 | } |
3238 | EXPORT_SYMBOL(drm_atomic_helper_crtc_reset); | |
3239 | ||
f5e7840b TR |
3240 | /** |
3241 | * __drm_atomic_helper_crtc_duplicate_state - copy atomic CRTC state | |
3242 | * @crtc: CRTC object | |
3243 | * @state: atomic CRTC state | |
3244 | * | |
3245 | * Copies atomic state from a CRTC's current state and resets inferred values. | |
3246 | * This is useful for drivers that subclass the CRTC state. | |
3247 | */ | |
3248 | void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc, | |
3249 | struct drm_crtc_state *state) | |
3250 | { | |
3251 | memcpy(state, crtc->state, sizeof(*state)); | |
3252 | ||
99cf4a29 | 3253 | if (state->mode_blob) |
6472e509 | 3254 | drm_property_blob_get(state->mode_blob); |
5488dc16 | 3255 | if (state->degamma_lut) |
6472e509 | 3256 | drm_property_blob_get(state->degamma_lut); |
5488dc16 | 3257 | if (state->ctm) |
6472e509 | 3258 | drm_property_blob_get(state->ctm); |
5488dc16 | 3259 | if (state->gamma_lut) |
6472e509 | 3260 | drm_property_blob_get(state->gamma_lut); |
f5e7840b TR |
3261 | state->mode_changed = false; |
3262 | state->active_changed = false; | |
3263 | state->planes_changed = false; | |
fc596660 | 3264 | state->connectors_changed = false; |
5488dc16 | 3265 | state->color_mgmt_changed = false; |
44d1240d | 3266 | state->zpos_changed = false; |
f5e7840b | 3267 | state->event = NULL; |
6cbe5c46 | 3268 | state->pageflip_flags = 0; |
f5e7840b TR |
3269 | } |
3270 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_duplicate_state); | |
3271 | ||
d461701c DV |
3272 | /** |
3273 | * drm_atomic_helper_crtc_duplicate_state - default state duplicate hook | |
3274 | * @crtc: drm CRTC | |
3275 | * | |
3276 | * Default CRTC state duplicate hook for drivers which don't have their own | |
3277 | * subclassed CRTC state structure. | |
3278 | */ | |
3279 | struct drm_crtc_state * | |
3280 | drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc) | |
3281 | { | |
3282 | struct drm_crtc_state *state; | |
3283 | ||
3284 | if (WARN_ON(!crtc->state)) | |
3285 | return NULL; | |
3286 | ||
f5e7840b TR |
3287 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
3288 | if (state) | |
3289 | __drm_atomic_helper_crtc_duplicate_state(crtc, state); | |
d461701c DV |
3290 | |
3291 | return state; | |
3292 | } | |
3293 | EXPORT_SYMBOL(drm_atomic_helper_crtc_duplicate_state); | |
3294 | ||
f5e7840b TR |
3295 | /** |
3296 | * __drm_atomic_helper_crtc_destroy_state - release CRTC state | |
f5e7840b TR |
3297 | * @state: CRTC state object to release |
3298 | * | |
3299 | * Releases all resources stored in the CRTC state without actually freeing | |
3300 | * the memory of the CRTC state. This is useful for drivers that subclass the | |
3301 | * CRTC state. | |
3302 | */ | |
ec2dc6a0 | 3303 | void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state) |
f5e7840b | 3304 | { |
6472e509 TR |
3305 | drm_property_blob_put(state->mode_blob); |
3306 | drm_property_blob_put(state->degamma_lut); | |
3307 | drm_property_blob_put(state->ctm); | |
3308 | drm_property_blob_put(state->gamma_lut); | |
f5e7840b TR |
3309 | } |
3310 | EXPORT_SYMBOL(__drm_atomic_helper_crtc_destroy_state); | |
3311 | ||
d461701c DV |
3312 | /** |
3313 | * drm_atomic_helper_crtc_destroy_state - default state destroy hook | |
3314 | * @crtc: drm CRTC | |
3315 | * @state: CRTC state object to release | |
3316 | * | |
3317 | * Default CRTC state destroy hook for drivers which don't have their own | |
3318 | * subclassed CRTC state structure. | |
3319 | */ | |
3320 | void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc, | |
3321 | struct drm_crtc_state *state) | |
3322 | { | |
ec2dc6a0 | 3323 | __drm_atomic_helper_crtc_destroy_state(state); |
d461701c DV |
3324 | kfree(state); |
3325 | } | |
3326 | EXPORT_SYMBOL(drm_atomic_helper_crtc_destroy_state); | |
3327 | ||
3328 | /** | |
6806cdf9 | 3329 | * drm_atomic_helper_plane_reset - default &drm_plane_funcs.reset hook for planes |
d461701c DV |
3330 | * @plane: drm plane |
3331 | * | |
3332 | * Resets the atomic state for @plane by freeing the state pointer (which might | |
3333 | * be NULL, e.g. at driver load time) and allocating a new empty state object. | |
3334 | */ | |
3335 | void drm_atomic_helper_plane_reset(struct drm_plane *plane) | |
3336 | { | |
b0b5511b | 3337 | if (plane->state) |
2f701695 | 3338 | __drm_atomic_helper_plane_destroy_state(plane->state); |
321ebf04 | 3339 | |
d461701c DV |
3340 | kfree(plane->state); |
3341 | plane->state = kzalloc(sizeof(*plane->state), GFP_KERNEL); | |
07cc0ef6 | 3342 | |
25aaa3a1 | 3343 | if (plane->state) { |
07cc0ef6 | 3344 | plane->state->plane = plane; |
c2c446ad | 3345 | plane->state->rotation = DRM_MODE_ROTATE_0; |
25aaa3a1 | 3346 | } |
d461701c DV |
3347 | } |
3348 | EXPORT_SYMBOL(drm_atomic_helper_plane_reset); | |
3349 | ||
f5e7840b TR |
3350 | /** |
3351 | * __drm_atomic_helper_plane_duplicate_state - copy atomic plane state | |
3352 | * @plane: plane object | |
3353 | * @state: atomic plane state | |
3354 | * | |
3355 | * Copies atomic state from a plane's current state. This is useful for | |
3356 | * drivers that subclass the plane state. | |
3357 | */ | |
3358 | void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane, | |
3359 | struct drm_plane_state *state) | |
3360 | { | |
3361 | memcpy(state, plane->state, sizeof(*state)); | |
3362 | ||
3363 | if (state->fb) | |
a4a69da0 | 3364 | drm_framebuffer_get(state->fb); |
96260142 GP |
3365 | |
3366 | state->fence = NULL; | |
f5e7840b TR |
3367 | } |
3368 | EXPORT_SYMBOL(__drm_atomic_helper_plane_duplicate_state); | |
3369 | ||
d461701c DV |
3370 | /** |
3371 | * drm_atomic_helper_plane_duplicate_state - default state duplicate hook | |
3372 | * @plane: drm plane | |
3373 | * | |
3374 | * Default plane state duplicate hook for drivers which don't have their own | |
3375 | * subclassed plane state structure. | |
3376 | */ | |
3377 | struct drm_plane_state * | |
3378 | drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane) | |
3379 | { | |
321ebf04 DV |
3380 | struct drm_plane_state *state; |
3381 | ||
d461701c DV |
3382 | if (WARN_ON(!plane->state)) |
3383 | return NULL; | |
3384 | ||
f5e7840b TR |
3385 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
3386 | if (state) | |
3387 | __drm_atomic_helper_plane_duplicate_state(plane, state); | |
321ebf04 DV |
3388 | |
3389 | return state; | |
d461701c DV |
3390 | } |
3391 | EXPORT_SYMBOL(drm_atomic_helper_plane_duplicate_state); | |
3392 | ||
f5e7840b TR |
3393 | /** |
3394 | * __drm_atomic_helper_plane_destroy_state - release plane state | |
f5e7840b TR |
3395 | * @state: plane state object to release |
3396 | * | |
3397 | * Releases all resources stored in the plane state without actually freeing | |
3398 | * the memory of the plane state. This is useful for drivers that subclass the | |
3399 | * plane state. | |
3400 | */ | |
2f701695 | 3401 | void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state) |
f5e7840b TR |
3402 | { |
3403 | if (state->fb) | |
a4a69da0 | 3404 | drm_framebuffer_put(state->fb); |
96260142 GP |
3405 | |
3406 | if (state->fence) | |
3407 | dma_fence_put(state->fence); | |
f5e7840b TR |
3408 | } |
3409 | EXPORT_SYMBOL(__drm_atomic_helper_plane_destroy_state); | |
3410 | ||
d461701c DV |
3411 | /** |
3412 | * drm_atomic_helper_plane_destroy_state - default state destroy hook | |
3413 | * @plane: drm plane | |
3414 | * @state: plane state object to release | |
3415 | * | |
3416 | * Default plane state destroy hook for drivers which don't have their own | |
3417 | * subclassed plane state structure. | |
3418 | */ | |
3419 | void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane, | |
321ebf04 | 3420 | struct drm_plane_state *state) |
d461701c | 3421 | { |
2f701695 | 3422 | __drm_atomic_helper_plane_destroy_state(state); |
d461701c DV |
3423 | kfree(state); |
3424 | } | |
3425 | EXPORT_SYMBOL(drm_atomic_helper_plane_destroy_state); | |
3426 | ||
4cd39917 ML |
3427 | /** |
3428 | * __drm_atomic_helper_connector_reset - reset state on connector | |
3429 | * @connector: drm connector | |
3430 | * @conn_state: connector state to assign | |
3431 | * | |
3432 | * Initializes the newly allocated @conn_state and assigns it to | |
6806cdf9 DV |
3433 | * the &drm_conector->state pointer of @connector, usually required when |
3434 | * initializing the drivers or when called from the &drm_connector_funcs.reset | |
3435 | * hook. | |
4cd39917 ML |
3436 | * |
3437 | * This is useful for drivers that subclass the connector state. | |
3438 | */ | |
3439 | void | |
3440 | __drm_atomic_helper_connector_reset(struct drm_connector *connector, | |
3441 | struct drm_connector_state *conn_state) | |
3442 | { | |
3443 | if (conn_state) | |
3444 | conn_state->connector = connector; | |
3445 | ||
3446 | connector->state = conn_state; | |
3447 | } | |
3448 | EXPORT_SYMBOL(__drm_atomic_helper_connector_reset); | |
3449 | ||
d461701c | 3450 | /** |
6806cdf9 | 3451 | * drm_atomic_helper_connector_reset - default &drm_connector_funcs.reset hook for connectors |
d461701c DV |
3452 | * @connector: drm connector |
3453 | * | |
3454 | * Resets the atomic state for @connector by freeing the state pointer (which | |
3455 | * might be NULL, e.g. at driver load time) and allocating a new empty state | |
3456 | * object. | |
3457 | */ | |
3458 | void drm_atomic_helper_connector_reset(struct drm_connector *connector) | |
3459 | { | |
4cd39917 ML |
3460 | struct drm_connector_state *conn_state = |
3461 | kzalloc(sizeof(*conn_state), GFP_KERNEL); | |
07cc0ef6 | 3462 | |
b0b5511b | 3463 | if (connector->state) |
fabd9106 | 3464 | __drm_atomic_helper_connector_destroy_state(connector->state); |
b0b5511b | 3465 | |
4cd39917 ML |
3466 | kfree(connector->state); |
3467 | __drm_atomic_helper_connector_reset(connector, conn_state); | |
d461701c DV |
3468 | } |
3469 | EXPORT_SYMBOL(drm_atomic_helper_connector_reset); | |
3470 | ||
f5e7840b TR |
3471 | /** |
3472 | * __drm_atomic_helper_connector_duplicate_state - copy atomic connector state | |
3473 | * @connector: connector object | |
3474 | * @state: atomic connector state | |
3475 | * | |
3476 | * Copies atomic state from a connector's current state. This is useful for | |
3477 | * drivers that subclass the connector state. | |
3478 | */ | |
3479 | void | |
3480 | __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector, | |
3481 | struct drm_connector_state *state) | |
3482 | { | |
3483 | memcpy(state, connector->state, sizeof(*state)); | |
d2307dea | 3484 | if (state->crtc) |
ad093607 | 3485 | drm_connector_get(connector); |
f5e7840b TR |
3486 | } |
3487 | EXPORT_SYMBOL(__drm_atomic_helper_connector_duplicate_state); | |
3488 | ||
d461701c DV |
3489 | /** |
3490 | * drm_atomic_helper_connector_duplicate_state - default state duplicate hook | |
3491 | * @connector: drm connector | |
3492 | * | |
3493 | * Default connector state duplicate hook for drivers which don't have their own | |
3494 | * subclassed connector state structure. | |
3495 | */ | |
3496 | struct drm_connector_state * | |
3497 | drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector) | |
3498 | { | |
f5e7840b TR |
3499 | struct drm_connector_state *state; |
3500 | ||
d461701c DV |
3501 | if (WARN_ON(!connector->state)) |
3502 | return NULL; | |
3503 | ||
f5e7840b TR |
3504 | state = kmalloc(sizeof(*state), GFP_KERNEL); |
3505 | if (state) | |
3506 | __drm_atomic_helper_connector_duplicate_state(connector, state); | |
3507 | ||
3508 | return state; | |
d461701c DV |
3509 | } |
3510 | EXPORT_SYMBOL(drm_atomic_helper_connector_duplicate_state); | |
3511 | ||
397fd77c TR |
3512 | /** |
3513 | * drm_atomic_helper_duplicate_state - duplicate an atomic state object | |
3514 | * @dev: DRM device | |
3515 | * @ctx: lock acquisition context | |
3516 | * | |
3517 | * Makes a copy of the current atomic state by looping over all objects and | |
14942760 TR |
3518 | * duplicating their respective states. This is used for example by suspend/ |
3519 | * resume support code to save the state prior to suspend such that it can | |
3520 | * be restored upon resume. | |
397fd77c TR |
3521 | * |
3522 | * Note that this treats atomic state as persistent between save and restore. | |
3523 | * Drivers must make sure that this is possible and won't result in confusion | |
3524 | * or erroneous behaviour. | |
3525 | * | |
3526 | * Note that if callers haven't already acquired all modeset locks this might | |
3527 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
3528 | * | |
3529 | * Returns: | |
3530 | * A pointer to the copy of the atomic state object on success or an | |
3531 | * ERR_PTR()-encoded error code on failure. | |
14942760 TR |
3532 | * |
3533 | * See also: | |
3534 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
397fd77c TR |
3535 | */ |
3536 | struct drm_atomic_state * | |
3537 | drm_atomic_helper_duplicate_state(struct drm_device *dev, | |
3538 | struct drm_modeset_acquire_ctx *ctx) | |
3539 | { | |
3540 | struct drm_atomic_state *state; | |
3541 | struct drm_connector *conn; | |
c36a3254 | 3542 | struct drm_connector_list_iter conn_iter; |
397fd77c TR |
3543 | struct drm_plane *plane; |
3544 | struct drm_crtc *crtc; | |
3545 | int err = 0; | |
3546 | ||
3547 | state = drm_atomic_state_alloc(dev); | |
3548 | if (!state) | |
3549 | return ERR_PTR(-ENOMEM); | |
3550 | ||
3551 | state->acquire_ctx = ctx; | |
3552 | ||
3553 | drm_for_each_crtc(crtc, dev) { | |
3554 | struct drm_crtc_state *crtc_state; | |
3555 | ||
3556 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3557 | if (IS_ERR(crtc_state)) { | |
3558 | err = PTR_ERR(crtc_state); | |
3559 | goto free; | |
3560 | } | |
3561 | } | |
3562 | ||
3563 | drm_for_each_plane(plane, dev) { | |
3564 | struct drm_plane_state *plane_state; | |
3565 | ||
3566 | plane_state = drm_atomic_get_plane_state(state, plane); | |
3567 | if (IS_ERR(plane_state)) { | |
3568 | err = PTR_ERR(plane_state); | |
3569 | goto free; | |
3570 | } | |
3571 | } | |
3572 | ||
b982dab1 | 3573 | drm_connector_list_iter_begin(dev, &conn_iter); |
c36a3254 | 3574 | drm_for_each_connector_iter(conn, &conn_iter) { |
397fd77c TR |
3575 | struct drm_connector_state *conn_state; |
3576 | ||
3577 | conn_state = drm_atomic_get_connector_state(state, conn); | |
3578 | if (IS_ERR(conn_state)) { | |
3579 | err = PTR_ERR(conn_state); | |
b982dab1 | 3580 | drm_connector_list_iter_end(&conn_iter); |
397fd77c TR |
3581 | goto free; |
3582 | } | |
3583 | } | |
b982dab1 | 3584 | drm_connector_list_iter_end(&conn_iter); |
397fd77c TR |
3585 | |
3586 | /* clear the acquire context so that it isn't accidentally reused */ | |
3587 | state->acquire_ctx = NULL; | |
3588 | ||
3589 | free: | |
3590 | if (err < 0) { | |
0853695c | 3591 | drm_atomic_state_put(state); |
397fd77c TR |
3592 | state = ERR_PTR(err); |
3593 | } | |
3594 | ||
3595 | return state; | |
3596 | } | |
3597 | EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); | |
3598 | ||
f5e7840b TR |
3599 | /** |
3600 | * __drm_atomic_helper_connector_destroy_state - release connector state | |
f5e7840b TR |
3601 | * @state: connector state object to release |
3602 | * | |
3603 | * Releases all resources stored in the connector state without actually | |
3604 | * freeing the memory of the connector state. This is useful for drivers that | |
3605 | * subclass the connector state. | |
3606 | */ | |
3607 | void | |
fabd9106 | 3608 | __drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state) |
f5e7840b | 3609 | { |
d2307dea | 3610 | if (state->crtc) |
ad093607 | 3611 | drm_connector_put(state->connector); |
f5e7840b TR |
3612 | } |
3613 | EXPORT_SYMBOL(__drm_atomic_helper_connector_destroy_state); | |
3614 | ||
d461701c DV |
3615 | /** |
3616 | * drm_atomic_helper_connector_destroy_state - default state destroy hook | |
3617 | * @connector: drm connector | |
3618 | * @state: connector state object to release | |
3619 | * | |
3620 | * Default connector state destroy hook for drivers which don't have their own | |
3621 | * subclassed connector state structure. | |
3622 | */ | |
3623 | void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector, | |
3624 | struct drm_connector_state *state) | |
3625 | { | |
fabd9106 | 3626 | __drm_atomic_helper_connector_destroy_state(state); |
d461701c DV |
3627 | kfree(state); |
3628 | } | |
3629 | EXPORT_SYMBOL(drm_atomic_helper_connector_destroy_state); | |
5488dc16 LL |
3630 | |
3631 | /** | |
3632 | * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table | |
3633 | * @crtc: CRTC object | |
3634 | * @red: red correction table | |
3635 | * @green: green correction table | |
3636 | * @blue: green correction table | |
5488dc16 | 3637 | * @size: size of the tables |
6d124ff8 | 3638 | * @ctx: lock acquire context |
5488dc16 LL |
3639 | * |
3640 | * Implements support for legacy gamma correction table for drivers | |
3641 | * that support color management through the DEGAMMA_LUT/GAMMA_LUT | |
2e38178e DV |
3642 | * properties. See drm_crtc_enable_color_mgmt() and the containing chapter for |
3643 | * how the atomic color management and gamma tables work. | |
5488dc16 | 3644 | */ |
7ea77283 ML |
3645 | int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc, |
3646 | u16 *red, u16 *green, u16 *blue, | |
6d124ff8 DV |
3647 | uint32_t size, |
3648 | struct drm_modeset_acquire_ctx *ctx) | |
5488dc16 LL |
3649 | { |
3650 | struct drm_device *dev = crtc->dev; | |
3651 | struct drm_mode_config *config = &dev->mode_config; | |
3652 | struct drm_atomic_state *state; | |
3653 | struct drm_crtc_state *crtc_state; | |
3654 | struct drm_property_blob *blob = NULL; | |
3655 | struct drm_color_lut *blob_data; | |
3656 | int i, ret = 0; | |
3657 | ||
3658 | state = drm_atomic_state_alloc(crtc->dev); | |
3659 | if (!state) | |
7ea77283 | 3660 | return -ENOMEM; |
5488dc16 LL |
3661 | |
3662 | blob = drm_property_create_blob(dev, | |
3663 | sizeof(struct drm_color_lut) * size, | |
3664 | NULL); | |
562c5b4d LL |
3665 | if (IS_ERR(blob)) { |
3666 | ret = PTR_ERR(blob); | |
c1f415c9 | 3667 | blob = NULL; |
5488dc16 LL |
3668 | goto fail; |
3669 | } | |
3670 | ||
3671 | /* Prepare GAMMA_LUT with the legacy values. */ | |
3672 | blob_data = (struct drm_color_lut *) blob->data; | |
3673 | for (i = 0; i < size; i++) { | |
3674 | blob_data[i].red = red[i]; | |
3675 | blob_data[i].green = green[i]; | |
3676 | blob_data[i].blue = blue[i]; | |
3677 | } | |
3678 | ||
3a09f737 | 3679 | state->acquire_ctx = ctx; |
5488dc16 LL |
3680 | crtc_state = drm_atomic_get_crtc_state(state, crtc); |
3681 | if (IS_ERR(crtc_state)) { | |
3682 | ret = PTR_ERR(crtc_state); | |
3683 | goto fail; | |
3684 | } | |
3685 | ||
3686 | /* Reset DEGAMMA_LUT and CTM properties. */ | |
3687 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3688 | config->degamma_lut_property, 0); | |
3689 | if (ret) | |
3690 | goto fail; | |
3691 | ||
3692 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3693 | config->ctm_property, 0); | |
3694 | if (ret) | |
3695 | goto fail; | |
3696 | ||
3697 | ret = drm_atomic_crtc_set_property(crtc, crtc_state, | |
3698 | config->gamma_lut_property, blob->base.id); | |
3699 | if (ret) | |
3700 | goto fail; | |
3701 | ||
3702 | ret = drm_atomic_commit(state); | |
5488dc16 | 3703 | |
3a09f737 | 3704 | fail: |
0853695c | 3705 | drm_atomic_state_put(state); |
6472e509 | 3706 | drm_property_blob_put(blob); |
7ea77283 | 3707 | return ret; |
5488dc16 LL |
3708 | } |
3709 | EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set); |