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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 | ||
0500c04e SR |
28 | #include <linux/dma-fence.h> |
29 | ||
c2fcd274 | 30 | #include <drm/drm_atomic.h> |
0500c04e | 31 | #include <drm/drm_atomic_helper.h> |
72fdb40c | 32 | #include <drm/drm_atomic_uapi.h> |
ee68c743 | 33 | #include <drm/drm_bridge.h> |
0500c04e SR |
34 | #include <drm/drm_damage_helper.h> |
35 | #include <drm/drm_device.h> | |
c2fcd274 | 36 | #include <drm/drm_plane_helper.h> |
0500c04e | 37 | #include <drm/drm_print.h> |
1452c25b | 38 | #include <drm/drm_self_refresh_helper.h> |
0500c04e | 39 | #include <drm/drm_vblank.h> |
935774cd | 40 | #include <drm/drm_writeback.h> |
c2fcd274 | 41 | |
faf94a08 | 42 | #include "drm_crtc_helper_internal.h" |
44d1240d MS |
43 | #include "drm_crtc_internal.h" |
44 | ||
3150c7d0 DV |
45 | /** |
46 | * DOC: overview | |
47 | * | |
48 | * This helper library provides implementations of check and commit functions on | |
49 | * top of the CRTC modeset helper callbacks and the plane helper callbacks. It | |
50 | * also provides convenience implementations for the atomic state handling | |
51 | * callbacks for drivers which don't need to subclass the drm core structures to | |
52 | * add their own additional internal state. | |
53 | * | |
54 | * This library also provides default implementations for the check callback in | |
26196f7e DV |
55 | * drm_atomic_helper_check() and for the commit callback with |
56 | * drm_atomic_helper_commit(). But the individual stages and callbacks are | |
57 | * exposed to allow drivers to mix and match and e.g. use the plane helpers only | |
3150c7d0 DV |
58 | * together with a driver private modeset implementation. |
59 | * | |
60 | * This library also provides implementations for all the legacy driver | |
26196f7e DV |
61 | * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(), |
62 | * drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the | |
3150c7d0 DV |
63 | * various functions to implement set_property callbacks. New drivers must not |
64 | * implement these functions themselves but must use the provided helpers. | |
092d01da DV |
65 | * |
66 | * The atomic helper uses the same function table structures as all other | |
ea0dd85a DV |
67 | * modesetting helpers. See the documentation for &struct drm_crtc_helper_funcs, |
68 | * struct &drm_encoder_helper_funcs and &struct drm_connector_helper_funcs. It | |
69 | * also shares the &struct drm_plane_helper_funcs function table with the plane | |
092d01da | 70 | * helpers. |
3150c7d0 | 71 | */ |
c2fcd274 DV |
72 | static void |
73 | drm_atomic_helper_plane_changed(struct drm_atomic_state *state, | |
415c3ac3 | 74 | struct drm_plane_state *old_plane_state, |
c2fcd274 DV |
75 | struct drm_plane_state *plane_state, |
76 | struct drm_plane *plane) | |
77 | { | |
78 | struct drm_crtc_state *crtc_state; | |
79 | ||
415c3ac3 | 80 | if (old_plane_state->crtc) { |
b4d93679 ML |
81 | crtc_state = drm_atomic_get_new_crtc_state(state, |
82 | old_plane_state->crtc); | |
c2fcd274 DV |
83 | |
84 | if (WARN_ON(!crtc_state)) | |
85 | return; | |
86 | ||
87 | crtc_state->planes_changed = true; | |
88 | } | |
89 | ||
90 | if (plane_state->crtc) { | |
b4d93679 | 91 | crtc_state = drm_atomic_get_new_crtc_state(state, plane_state->crtc); |
c2fcd274 DV |
92 | |
93 | if (WARN_ON(!crtc_state)) | |
94 | return; | |
95 | ||
96 | crtc_state->planes_changed = true; | |
97 | } | |
98 | } | |
99 | ||
297e30b5 DV |
100 | /* |
101 | * For connectors that support multiple encoders, either the | |
102 | * .atomic_best_encoder() or .best_encoder() operation must be implemented. | |
103 | */ | |
104 | static struct drm_encoder * | |
105 | pick_single_encoder_for_connector(struct drm_connector *connector) | |
106 | { | |
107 | WARN_ON(connector->encoder_ids[1]); | |
108 | return drm_encoder_find(connector->dev, NULL, connector->encoder_ids[0]); | |
109 | } | |
110 | ||
8248b65d ML |
111 | static int handle_conflicting_encoders(struct drm_atomic_state *state, |
112 | bool disable_conflicting_encoders) | |
97ac3204 | 113 | { |
415c3ac3 | 114 | struct drm_connector_state *new_conn_state; |
40616a26 | 115 | struct drm_connector *connector; |
c36a3254 | 116 | struct drm_connector_list_iter conn_iter; |
40616a26 ML |
117 | struct drm_encoder *encoder; |
118 | unsigned encoder_mask = 0; | |
c36a3254 | 119 | int i, ret = 0; |
97ac3204 | 120 | |
8248b65d ML |
121 | /* |
122 | * First loop, find all newly assigned encoders from the connectors | |
123 | * part of the state. If the same encoder is assigned to multiple | |
124 | * connectors bail out. | |
125 | */ | |
415c3ac3 | 126 | for_each_new_connector_in_state(state, connector, new_conn_state, i) { |
40616a26 ML |
127 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; |
128 | struct drm_encoder *new_encoder; | |
129 | ||
415c3ac3 | 130 | if (!new_conn_state->crtc) |
97ac3204 DV |
131 | continue; |
132 | ||
40616a26 | 133 | if (funcs->atomic_best_encoder) |
415c3ac3 | 134 | new_encoder = funcs->atomic_best_encoder(connector, new_conn_state); |
a0909cc5 | 135 | else if (funcs->best_encoder) |
40616a26 | 136 | new_encoder = funcs->best_encoder(connector); |
a0909cc5 | 137 | else |
297e30b5 | 138 | new_encoder = pick_single_encoder_for_connector(connector); |
40616a26 | 139 | |
8248b65d | 140 | if (new_encoder) { |
6f3be036 | 141 | if (encoder_mask & drm_encoder_mask(new_encoder)) { |
8248b65d ML |
142 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n", |
143 | new_encoder->base.id, new_encoder->name, | |
144 | connector->base.id, connector->name); | |
145 | ||
146 | return -EINVAL; | |
147 | } | |
148 | ||
6f3be036 | 149 | encoder_mask |= drm_encoder_mask(new_encoder); |
8248b65d | 150 | } |
97ac3204 DV |
151 | } |
152 | ||
8248b65d ML |
153 | if (!encoder_mask) |
154 | return 0; | |
97ac3204 | 155 | |
8248b65d ML |
156 | /* |
157 | * Second loop, iterate over all connectors not part of the state. | |
158 | * | |
159 | * If a conflicting encoder is found and disable_conflicting_encoders | |
160 | * is not set, an error is returned. Userspace can provide a solution | |
161 | * through the atomic ioctl. | |
162 | * | |
163 | * If the flag is set conflicting connectors are removed from the crtc | |
164 | * and the crtc is disabled if no encoder is left. This preserves | |
165 | * compatibility with the legacy set_config behavior. | |
166 | */ | |
b982dab1 | 167 | drm_connector_list_iter_begin(state->dev, &conn_iter); |
c36a3254 | 168 | drm_for_each_connector_iter(connector, &conn_iter) { |
40616a26 | 169 | struct drm_crtc_state *crtc_state; |
623369e5 | 170 | |
b4d93679 | 171 | if (drm_atomic_get_new_connector_state(state, connector)) |
40616a26 | 172 | continue; |
623369e5 | 173 | |
40616a26 | 174 | encoder = connector->state->best_encoder; |
6f3be036 | 175 | if (!encoder || !(encoder_mask & drm_encoder_mask(encoder))) |
623369e5 DV |
176 | continue; |
177 | ||
8248b65d ML |
178 | if (!disable_conflicting_encoders) { |
179 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n", | |
180 | encoder->base.id, encoder->name, | |
181 | connector->state->crtc->base.id, | |
182 | connector->state->crtc->name, | |
183 | connector->base.id, connector->name); | |
c36a3254 DV |
184 | ret = -EINVAL; |
185 | goto out; | |
8248b65d ML |
186 | } |
187 | ||
415c3ac3 ML |
188 | new_conn_state = drm_atomic_get_connector_state(state, connector); |
189 | if (IS_ERR(new_conn_state)) { | |
190 | ret = PTR_ERR(new_conn_state); | |
c36a3254 DV |
191 | goto out; |
192 | } | |
40616a26 ML |
193 | |
194 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n", | |
195 | encoder->base.id, encoder->name, | |
415c3ac3 | 196 | new_conn_state->crtc->base.id, new_conn_state->crtc->name, |
40616a26 ML |
197 | connector->base.id, connector->name); |
198 | ||
b4d93679 | 199 | crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); |
40616a26 | 200 | |
415c3ac3 | 201 | ret = drm_atomic_set_crtc_for_connector(new_conn_state, NULL); |
40616a26 | 202 | if (ret) |
c36a3254 | 203 | goto out; |
40616a26 ML |
204 | |
205 | if (!crtc_state->connector_mask) { | |
206 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, | |
207 | NULL); | |
208 | if (ret < 0) | |
c36a3254 | 209 | goto out; |
40616a26 ML |
210 | |
211 | crtc_state->active = false; | |
212 | } | |
623369e5 | 213 | } |
c36a3254 | 214 | out: |
b982dab1 | 215 | drm_connector_list_iter_end(&conn_iter); |
623369e5 | 216 | |
c36a3254 | 217 | return ret; |
623369e5 DV |
218 | } |
219 | ||
e87a52b3 ML |
220 | static void |
221 | set_best_encoder(struct drm_atomic_state *state, | |
222 | struct drm_connector_state *conn_state, | |
223 | struct drm_encoder *encoder) | |
224 | { | |
225 | struct drm_crtc_state *crtc_state; | |
226 | struct drm_crtc *crtc; | |
227 | ||
228 | if (conn_state->best_encoder) { | |
229 | /* Unset the encoder_mask in the old crtc state. */ | |
230 | crtc = conn_state->connector->state->crtc; | |
231 | ||
232 | /* A NULL crtc is an error here because we should have | |
233 | * duplicated a NULL best_encoder when crtc was NULL. | |
234 | * As an exception restoring duplicated atomic state | |
235 | * during resume is allowed, so don't warn when | |
236 | * best_encoder is equal to encoder we intend to set. | |
237 | */ | |
238 | WARN_ON(!crtc && encoder != conn_state->best_encoder); | |
239 | if (crtc) { | |
b4d93679 | 240 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); |
e87a52b3 ML |
241 | |
242 | crtc_state->encoder_mask &= | |
6f3be036 | 243 | ~drm_encoder_mask(conn_state->best_encoder); |
e87a52b3 ML |
244 | } |
245 | } | |
246 | ||
247 | if (encoder) { | |
248 | crtc = conn_state->crtc; | |
249 | WARN_ON(!crtc); | |
250 | if (crtc) { | |
b4d93679 | 251 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); |
e87a52b3 ML |
252 | |
253 | crtc_state->encoder_mask |= | |
6f3be036 | 254 | drm_encoder_mask(encoder); |
e87a52b3 ML |
255 | } |
256 | } | |
257 | ||
258 | conn_state->best_encoder = encoder; | |
259 | } | |
260 | ||
ec5aaa58 | 261 | static void |
623369e5 | 262 | steal_encoder(struct drm_atomic_state *state, |
ff19b786 | 263 | struct drm_encoder *encoder) |
623369e5 | 264 | { |
623369e5 DV |
265 | struct drm_crtc_state *crtc_state; |
266 | struct drm_connector *connector; | |
415c3ac3 | 267 | struct drm_connector_state *old_connector_state, *new_connector_state; |
ec5aaa58 | 268 | int i; |
623369e5 | 269 | |
415c3ac3 | 270 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { |
ff19b786 | 271 | struct drm_crtc *encoder_crtc; |
623369e5 | 272 | |
415c3ac3 | 273 | if (new_connector_state->best_encoder != encoder) |
623369e5 DV |
274 | continue; |
275 | ||
415c3ac3 | 276 | encoder_crtc = old_connector_state->crtc; |
623369e5 | 277 | |
ff19b786 ML |
278 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n", |
279 | encoder->base.id, encoder->name, | |
280 | encoder_crtc->base.id, encoder_crtc->name); | |
e87a52b3 | 281 | |
415c3ac3 | 282 | set_best_encoder(state, new_connector_state, NULL); |
623369e5 | 283 | |
b4d93679 | 284 | crtc_state = drm_atomic_get_new_crtc_state(state, encoder_crtc); |
ff19b786 ML |
285 | crtc_state->connectors_changed = true; |
286 | ||
ec5aaa58 | 287 | return; |
623369e5 | 288 | } |
623369e5 DV |
289 | } |
290 | ||
291 | static int | |
9459545b ML |
292 | update_connector_routing(struct drm_atomic_state *state, |
293 | struct drm_connector *connector, | |
415c3ac3 ML |
294 | struct drm_connector_state *old_connector_state, |
295 | struct drm_connector_state *new_connector_state) | |
623369e5 | 296 | { |
b5ceff20 | 297 | const struct drm_connector_helper_funcs *funcs; |
623369e5 | 298 | struct drm_encoder *new_encoder; |
623369e5 | 299 | struct drm_crtc_state *crtc_state; |
623369e5 | 300 | |
17a38d9c DV |
301 | DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n", |
302 | connector->base.id, | |
303 | connector->name); | |
623369e5 | 304 | |
415c3ac3 ML |
305 | if (old_connector_state->crtc != new_connector_state->crtc) { |
306 | if (old_connector_state->crtc) { | |
b4d93679 | 307 | crtc_state = drm_atomic_get_new_crtc_state(state, old_connector_state->crtc); |
fc596660 | 308 | crtc_state->connectors_changed = true; |
623369e5 DV |
309 | } |
310 | ||
415c3ac3 | 311 | if (new_connector_state->crtc) { |
b4d93679 | 312 | crtc_state = drm_atomic_get_new_crtc_state(state, new_connector_state->crtc); |
fc596660 | 313 | crtc_state->connectors_changed = true; |
623369e5 DV |
314 | } |
315 | } | |
316 | ||
415c3ac3 | 317 | if (!new_connector_state->crtc) { |
17a38d9c | 318 | DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n", |
623369e5 DV |
319 | connector->base.id, |
320 | connector->name); | |
321 | ||
415c3ac3 | 322 | set_best_encoder(state, new_connector_state, NULL); |
623369e5 DV |
323 | |
324 | return 0; | |
325 | } | |
326 | ||
de9f8eea LP |
327 | crtc_state = drm_atomic_get_new_crtc_state(state, |
328 | new_connector_state->crtc); | |
329 | /* | |
330 | * For compatibility with legacy users, we want to make sure that | |
331 | * we allow DPMS On->Off modesets on unregistered connectors. Modesets | |
332 | * which would result in anything else must be considered invalid, to | |
333 | * avoid turning on new displays on dead connectors. | |
334 | * | |
335 | * Since the connector can be unregistered at any point during an | |
336 | * atomic check or commit, this is racy. But that's OK: all we care | |
337 | * about is ensuring that userspace can't do anything but shut off the | |
1e55a53a | 338 | * display on a connector that was destroyed after it's been notified, |
de9f8eea | 339 | * not before. |
022debad LP |
340 | * |
341 | * Additionally, we also want to ignore connector registration when | |
342 | * we're trying to restore an atomic state during system resume since | |
343 | * there's a chance the connector may have been destroyed during the | |
344 | * process, but it's better to ignore that then cause | |
345 | * drm_atomic_helper_resume() to fail. | |
de9f8eea | 346 | */ |
022debad LP |
347 | if (!state->duplicated && drm_connector_is_unregistered(connector) && |
348 | crtc_state->active) { | |
de9f8eea LP |
349 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] is not registered\n", |
350 | connector->base.id, connector->name); | |
351 | return -EINVAL; | |
352 | } | |
353 | ||
623369e5 | 354 | funcs = connector->helper_private; |
3b8a684b DV |
355 | |
356 | if (funcs->atomic_best_encoder) | |
357 | new_encoder = funcs->atomic_best_encoder(connector, | |
415c3ac3 | 358 | new_connector_state); |
c61b93fe | 359 | else if (funcs->best_encoder) |
3b8a684b | 360 | new_encoder = funcs->best_encoder(connector); |
c61b93fe | 361 | else |
297e30b5 | 362 | new_encoder = pick_single_encoder_for_connector(connector); |
623369e5 DV |
363 | |
364 | if (!new_encoder) { | |
17a38d9c DV |
365 | DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", |
366 | connector->base.id, | |
367 | connector->name); | |
623369e5 DV |
368 | return -EINVAL; |
369 | } | |
370 | ||
415c3ac3 | 371 | if (!drm_encoder_crtc_ok(new_encoder, new_connector_state->crtc)) { |
6ac7c548 | 372 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d:%s]\n", |
5481c8fb DV |
373 | new_encoder->base.id, |
374 | new_encoder->name, | |
415c3ac3 ML |
375 | new_connector_state->crtc->base.id, |
376 | new_connector_state->crtc->name); | |
5481c8fb DV |
377 | return -EINVAL; |
378 | } | |
379 | ||
415c3ac3 ML |
380 | if (new_encoder == new_connector_state->best_encoder) { |
381 | set_best_encoder(state, new_connector_state, new_encoder); | |
e87a52b3 | 382 | |
fa3ab4c2 | 383 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n", |
17a38d9c DV |
384 | connector->base.id, |
385 | connector->name, | |
386 | new_encoder->base.id, | |
387 | new_encoder->name, | |
415c3ac3 ML |
388 | new_connector_state->crtc->base.id, |
389 | new_connector_state->crtc->name); | |
623369e5 DV |
390 | |
391 | return 0; | |
392 | } | |
393 | ||
ec5aaa58 | 394 | steal_encoder(state, new_encoder); |
6ea76f3c | 395 | |
415c3ac3 | 396 | set_best_encoder(state, new_connector_state, new_encoder); |
e87a52b3 | 397 | |
fc596660 | 398 | crtc_state->connectors_changed = true; |
623369e5 | 399 | |
fa3ab4c2 | 400 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n", |
17a38d9c DV |
401 | connector->base.id, |
402 | connector->name, | |
403 | new_encoder->base.id, | |
404 | new_encoder->name, | |
415c3ac3 ML |
405 | new_connector_state->crtc->base.id, |
406 | new_connector_state->crtc->name); | |
623369e5 DV |
407 | |
408 | return 0; | |
409 | } | |
410 | ||
411 | static int | |
412 | mode_fixup(struct drm_atomic_state *state) | |
413 | { | |
df63b999 | 414 | struct drm_crtc *crtc; |
415c3ac3 | 415 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 416 | struct drm_connector *connector; |
415c3ac3 | 417 | struct drm_connector_state *new_conn_state; |
623369e5 | 418 | int i; |
f9ad86e4 | 419 | int ret; |
623369e5 | 420 | |
415c3ac3 ML |
421 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
422 | if (!new_crtc_state->mode_changed && | |
423 | !new_crtc_state->connectors_changed) | |
623369e5 DV |
424 | continue; |
425 | ||
415c3ac3 | 426 | drm_mode_copy(&new_crtc_state->adjusted_mode, &new_crtc_state->mode); |
623369e5 DV |
427 | } |
428 | ||
415c3ac3 | 429 | for_each_new_connector_in_state(state, connector, new_conn_state, i) { |
b5ceff20 | 430 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
431 | struct drm_encoder *encoder; |
432 | ||
415c3ac3 | 433 | WARN_ON(!!new_conn_state->best_encoder != !!new_conn_state->crtc); |
623369e5 | 434 | |
415c3ac3 | 435 | if (!new_conn_state->crtc || !new_conn_state->best_encoder) |
623369e5 DV |
436 | continue; |
437 | ||
415c3ac3 | 438 | new_crtc_state = |
b4d93679 | 439 | drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); |
623369e5 DV |
440 | |
441 | /* | |
442 | * Each encoder has at most one connector (since we always steal | |
443 | * it away), so we won't call ->mode_fixup twice. | |
444 | */ | |
415c3ac3 | 445 | encoder = new_conn_state->best_encoder; |
623369e5 DV |
446 | funcs = encoder->helper_private; |
447 | ||
415c3ac3 ML |
448 | ret = drm_bridge_mode_fixup(encoder->bridge, &new_crtc_state->mode, |
449 | &new_crtc_state->adjusted_mode); | |
862e686c AT |
450 | if (!ret) { |
451 | DRM_DEBUG_ATOMIC("Bridge fixup failed\n"); | |
452 | return -EINVAL; | |
623369e5 DV |
453 | } |
454 | ||
2827635e | 455 | if (funcs && funcs->atomic_check) { |
415c3ac3 ML |
456 | ret = funcs->atomic_check(encoder, new_crtc_state, |
457 | new_conn_state); | |
4cd4df80 | 458 | if (ret) { |
17a38d9c DV |
459 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", |
460 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
461 | return ret; |
462 | } | |
2827635e | 463 | } else if (funcs && funcs->mode_fixup) { |
415c3ac3 ML |
464 | ret = funcs->mode_fixup(encoder, &new_crtc_state->mode, |
465 | &new_crtc_state->adjusted_mode); | |
4cd4df80 | 466 | if (!ret) { |
17a38d9c DV |
467 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", |
468 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
469 | return -EINVAL; |
470 | } | |
623369e5 DV |
471 | } |
472 | } | |
473 | ||
415c3ac3 | 474 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
b5ceff20 | 475 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 476 | |
415c3ac3 | 477 | if (!new_crtc_state->enable) |
f55f1701 LY |
478 | continue; |
479 | ||
415c3ac3 ML |
480 | if (!new_crtc_state->mode_changed && |
481 | !new_crtc_state->connectors_changed) | |
623369e5 DV |
482 | continue; |
483 | ||
484 | funcs = crtc->helper_private; | |
840bfe95 ACO |
485 | if (!funcs->mode_fixup) |
486 | continue; | |
487 | ||
415c3ac3 ML |
488 | ret = funcs->mode_fixup(crtc, &new_crtc_state->mode, |
489 | &new_crtc_state->adjusted_mode); | |
623369e5 | 490 | if (!ret) { |
fa3ab4c2 VS |
491 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n", |
492 | crtc->base.id, crtc->name); | |
623369e5 DV |
493 | return -EINVAL; |
494 | } | |
495 | } | |
496 | ||
497 | return 0; | |
498 | } | |
499 | ||
faf94a08 JA |
500 | static enum drm_mode_status mode_valid_path(struct drm_connector *connector, |
501 | struct drm_encoder *encoder, | |
502 | struct drm_crtc *crtc, | |
8518f05a | 503 | const struct drm_display_mode *mode) |
faf94a08 JA |
504 | { |
505 | enum drm_mode_status ret; | |
506 | ||
507 | ret = drm_encoder_mode_valid(encoder, mode); | |
508 | if (ret != MODE_OK) { | |
509 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] mode_valid() failed\n", | |
510 | encoder->base.id, encoder->name); | |
511 | return ret; | |
512 | } | |
513 | ||
514 | ret = drm_bridge_mode_valid(encoder->bridge, mode); | |
515 | if (ret != MODE_OK) { | |
516 | DRM_DEBUG_ATOMIC("[BRIDGE] mode_valid() failed\n"); | |
517 | return ret; | |
518 | } | |
519 | ||
520 | ret = drm_crtc_mode_valid(crtc, mode); | |
521 | if (ret != MODE_OK) { | |
522 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode_valid() failed\n", | |
523 | crtc->base.id, crtc->name); | |
524 | return ret; | |
525 | } | |
526 | ||
527 | return ret; | |
528 | } | |
529 | ||
530 | static int | |
531 | mode_valid(struct drm_atomic_state *state) | |
532 | { | |
533 | struct drm_connector_state *conn_state; | |
534 | struct drm_connector *connector; | |
535 | int i; | |
536 | ||
537 | for_each_new_connector_in_state(state, connector, conn_state, i) { | |
538 | struct drm_encoder *encoder = conn_state->best_encoder; | |
539 | struct drm_crtc *crtc = conn_state->crtc; | |
540 | struct drm_crtc_state *crtc_state; | |
541 | enum drm_mode_status mode_status; | |
8518f05a | 542 | const struct drm_display_mode *mode; |
faf94a08 JA |
543 | |
544 | if (!crtc || !encoder) | |
545 | continue; | |
546 | ||
547 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); | |
548 | if (!crtc_state) | |
549 | continue; | |
550 | if (!crtc_state->mode_changed && !crtc_state->connectors_changed) | |
551 | continue; | |
552 | ||
553 | mode = &crtc_state->mode; | |
554 | ||
555 | mode_status = mode_valid_path(connector, encoder, crtc, mode); | |
556 | if (mode_status != MODE_OK) | |
557 | return -EINVAL; | |
558 | } | |
559 | ||
560 | return 0; | |
561 | } | |
562 | ||
d9b13620 | 563 | /** |
f98bd3ef | 564 | * drm_atomic_helper_check_modeset - validate state object for modeset changes |
d9b13620 DV |
565 | * @dev: DRM device |
566 | * @state: the driver state object | |
567 | * | |
568 | * Check the state object to see if the requested state is physically possible. | |
569 | * This does all the crtc and connector related computations for an atomic | |
ce09d766 ML |
570 | * update and adds any additional connectors needed for full modesets. It calls |
571 | * the various per-object callbacks in the follow order: | |
572 | * | |
573 | * 1. &drm_connector_helper_funcs.atomic_best_encoder for determining the new encoder. | |
574 | * 2. &drm_connector_helper_funcs.atomic_check to validate the connector state. | |
575 | * 3. If it's determined a modeset is needed then all connectors on the affected crtc | |
576 | * crtc are added and &drm_connector_helper_funcs.atomic_check is run on them. | |
faf94a08 JA |
577 | * 4. &drm_encoder_helper_funcs.mode_valid, &drm_bridge_funcs.mode_valid and |
578 | * &drm_crtc_helper_funcs.mode_valid are called on the affected components. | |
579 | * 5. &drm_bridge_funcs.mode_fixup is called on all encoder bridges. | |
580 | * 6. &drm_encoder_helper_funcs.atomic_check is called to validate any encoder state. | |
ce09d766 ML |
581 | * This function is only called when the encoder will be part of a configured crtc, |
582 | * it must not be used for implementing connector property validation. | |
583 | * If this function is NULL, &drm_atomic_encoder_helper_funcs.mode_fixup is called | |
584 | * instead. | |
faf94a08 | 585 | * 7. &drm_crtc_helper_funcs.mode_fixup is called last, to fix up the mode with crtc constraints. |
6806cdf9 DV |
586 | * |
587 | * &drm_crtc_state.mode_changed is set when the input mode is changed. | |
588 | * &drm_crtc_state.connectors_changed is set when a connector is added or | |
589 | * removed from the crtc. &drm_crtc_state.active_changed is set when | |
590 | * &drm_crtc_state.active changes, which is used for DPMS. | |
d807ed1c | 591 | * See also: drm_atomic_crtc_needs_modeset() |
d9b13620 DV |
592 | * |
593 | * IMPORTANT: | |
594 | * | |
6806cdf9 DV |
595 | * Drivers which set &drm_crtc_state.mode_changed (e.g. in their |
596 | * &drm_plane_helper_funcs.atomic_check hooks if a plane update can't be done | |
597 | * without a full modeset) _must_ call this function afterwards after that | |
598 | * change. It is permitted to call this function multiple times for the same | |
599 | * update, e.g. when the &drm_crtc_helper_funcs.atomic_check functions depend | |
600 | * upon the adjusted dotclock for fifo space allocation and watermark | |
601 | * computation. | |
d9b13620 | 602 | * |
c39032a8 | 603 | * RETURNS: |
d9b13620 DV |
604 | * Zero for success or -errno |
605 | */ | |
606 | int | |
934ce1c2 | 607 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
608 | struct drm_atomic_state *state) |
609 | { | |
623369e5 | 610 | struct drm_crtc *crtc; |
415c3ac3 | 611 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
df63b999 | 612 | struct drm_connector *connector; |
415c3ac3 | 613 | struct drm_connector_state *old_connector_state, *new_connector_state; |
623369e5 | 614 | int i, ret; |
ce09d766 | 615 | unsigned connectors_mask = 0; |
623369e5 | 616 | |
415c3ac3 | 617 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
970ece83 ML |
618 | bool has_connectors = |
619 | !!new_crtc_state->connector_mask; | |
620 | ||
869e188a DV |
621 | WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); |
622 | ||
415c3ac3 | 623 | if (!drm_mode_equal(&old_crtc_state->mode, &new_crtc_state->mode)) { |
fa3ab4c2 VS |
624 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n", |
625 | crtc->base.id, crtc->name); | |
415c3ac3 | 626 | new_crtc_state->mode_changed = true; |
623369e5 DV |
627 | } |
628 | ||
415c3ac3 | 629 | if (old_crtc_state->enable != new_crtc_state->enable) { |
fa3ab4c2 VS |
630 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n", |
631 | crtc->base.id, crtc->name); | |
fc596660 ML |
632 | |
633 | /* | |
634 | * For clarity this assignment is done here, but | |
635 | * enable == 0 is only true when there are no | |
636 | * connectors and a NULL mode. | |
637 | * | |
638 | * The other way around is true as well. enable != 0 | |
639 | * iff connectors are attached and a mode is set. | |
640 | */ | |
415c3ac3 ML |
641 | new_crtc_state->mode_changed = true; |
642 | new_crtc_state->connectors_changed = true; | |
623369e5 | 643 | } |
24d6652c ML |
644 | |
645 | if (old_crtc_state->active != new_crtc_state->active) { | |
646 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", | |
647 | crtc->base.id, crtc->name); | |
648 | new_crtc_state->active_changed = true; | |
649 | } | |
970ece83 ML |
650 | |
651 | if (new_crtc_state->enable != has_connectors) { | |
652 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", | |
653 | crtc->base.id, crtc->name); | |
654 | ||
655 | return -EINVAL; | |
656 | } | |
623369e5 DV |
657 | } |
658 | ||
44596b8c | 659 | ret = handle_conflicting_encoders(state, false); |
8248b65d ML |
660 | if (ret) |
661 | return ret; | |
40616a26 | 662 | |
415c3ac3 | 663 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { |
ce09d766 ML |
664 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; |
665 | ||
869e188a DV |
666 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); |
667 | ||
623369e5 | 668 | /* |
d807ed1c BS |
669 | * This only sets crtc->connectors_changed for routing changes, |
670 | * drivers must set crtc->connectors_changed themselves when | |
671 | * connector properties need to be updated. | |
623369e5 | 672 | */ |
9459545b | 673 | ret = update_connector_routing(state, connector, |
415c3ac3 ML |
674 | old_connector_state, |
675 | new_connector_state); | |
623369e5 DV |
676 | if (ret) |
677 | return ret; | |
415c3ac3 | 678 | if (old_connector_state->crtc) { |
b4d93679 ML |
679 | new_crtc_state = drm_atomic_get_new_crtc_state(state, |
680 | old_connector_state->crtc); | |
415c3ac3 ML |
681 | if (old_connector_state->link_status != |
682 | new_connector_state->link_status) | |
683 | new_crtc_state->connectors_changed = true; | |
47e22ff1 RS |
684 | |
685 | if (old_connector_state->max_requested_bpc != | |
686 | new_connector_state->max_requested_bpc) | |
687 | new_crtc_state->connectors_changed = true; | |
40ee6fbe | 688 | } |
ce09d766 ML |
689 | |
690 | if (funcs->atomic_check) | |
6f3b6278 | 691 | ret = funcs->atomic_check(connector, state); |
ce09d766 ML |
692 | if (ret) |
693 | return ret; | |
694 | ||
ca52bea9 | 695 | connectors_mask |= BIT(i); |
623369e5 DV |
696 | } |
697 | ||
698 | /* | |
699 | * After all the routing has been prepared we need to add in any | |
1e55a53a | 700 | * connector which is itself unchanged, but whose crtc changes its |
623369e5 DV |
701 | * configuration. This must be done before calling mode_fixup in case a |
702 | * crtc only changed its mode but has the same set of connectors. | |
703 | */ | |
415c3ac3 | 704 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
415c3ac3 | 705 | if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) |
623369e5 DV |
706 | continue; |
707 | ||
fa3ab4c2 VS |
708 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n", |
709 | crtc->base.id, crtc->name, | |
415c3ac3 ML |
710 | new_crtc_state->enable ? 'y' : 'n', |
711 | new_crtc_state->active ? 'y' : 'n'); | |
623369e5 DV |
712 | |
713 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
714 | if (ret != 0) | |
715 | return ret; | |
716 | ||
57744aa7 ML |
717 | ret = drm_atomic_add_affected_planes(state, crtc); |
718 | if (ret != 0) | |
719 | return ret; | |
623369e5 DV |
720 | } |
721 | ||
ce09d766 ML |
722 | /* |
723 | * Iterate over all connectors again, to make sure atomic_check() | |
724 | * has been called on them when a modeset is forced. | |
725 | */ | |
726 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { | |
727 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; | |
728 | ||
729 | if (connectors_mask & BIT(i)) | |
730 | continue; | |
731 | ||
732 | if (funcs->atomic_check) | |
6f3b6278 | 733 | ret = funcs->atomic_check(connector, state); |
ce09d766 ML |
734 | if (ret) |
735 | return ret; | |
736 | } | |
737 | ||
faf94a08 JA |
738 | ret = mode_valid(state); |
739 | if (ret) | |
740 | return ret; | |
741 | ||
623369e5 DV |
742 | return mode_fixup(state); |
743 | } | |
d9b13620 | 744 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 745 | |
a01cb8ba VS |
746 | /** |
747 | * drm_atomic_helper_check_plane_state() - Check plane state for validity | |
748 | * @plane_state: plane state to check | |
749 | * @crtc_state: crtc state to check | |
a01cb8ba VS |
750 | * @min_scale: minimum @src:@dest scaling factor in 16.16 fixed point |
751 | * @max_scale: maximum @src:@dest scaling factor in 16.16 fixed point | |
752 | * @can_position: is it legal to position the plane such that it | |
753 | * doesn't cover the entire crtc? This will generally | |
754 | * only be false for primary planes. | |
755 | * @can_update_disabled: can the plane be updated while the crtc | |
756 | * is disabled? | |
757 | * | |
758 | * Checks that a desired plane update is valid, and updates various | |
759 | * bits of derived state (clipped coordinates etc.). Drivers that provide | |
760 | * their own plane handling rather than helper-provided implementations may | |
761 | * still wish to call this function to avoid duplication of error checking | |
762 | * code. | |
763 | * | |
764 | * RETURNS: | |
765 | * Zero if update appears valid, error code on failure | |
766 | */ | |
767 | int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state, | |
768 | const struct drm_crtc_state *crtc_state, | |
a01cb8ba VS |
769 | int min_scale, |
770 | int max_scale, | |
771 | bool can_position, | |
772 | bool can_update_disabled) | |
773 | { | |
774 | struct drm_framebuffer *fb = plane_state->fb; | |
775 | struct drm_rect *src = &plane_state->src; | |
776 | struct drm_rect *dst = &plane_state->dst; | |
777 | unsigned int rotation = plane_state->rotation; | |
81af63a4 | 778 | struct drm_rect clip = {}; |
a01cb8ba VS |
779 | int hscale, vscale; |
780 | ||
781 | WARN_ON(plane_state->crtc && plane_state->crtc != crtc_state->crtc); | |
782 | ||
783 | *src = drm_plane_state_src(plane_state); | |
784 | *dst = drm_plane_state_dest(plane_state); | |
785 | ||
786 | if (!fb) { | |
787 | plane_state->visible = false; | |
788 | return 0; | |
789 | } | |
790 | ||
791 | /* crtc should only be NULL when disabling (i.e., !fb) */ | |
792 | if (WARN_ON(!plane_state->crtc)) { | |
793 | plane_state->visible = false; | |
794 | return 0; | |
795 | } | |
796 | ||
797 | if (!crtc_state->enable && !can_update_disabled) { | |
798 | DRM_DEBUG_KMS("Cannot update plane of a disabled CRTC.\n"); | |
799 | return -EINVAL; | |
800 | } | |
801 | ||
802 | drm_rect_rotate(src, fb->width << 16, fb->height << 16, rotation); | |
803 | ||
804 | /* Check scaling */ | |
805 | hscale = drm_rect_calc_hscale(src, dst, min_scale, max_scale); | |
806 | vscale = drm_rect_calc_vscale(src, dst, min_scale, max_scale); | |
807 | if (hscale < 0 || vscale < 0) { | |
808 | DRM_DEBUG_KMS("Invalid scaling of plane\n"); | |
809 | drm_rect_debug_print("src: ", &plane_state->src, true); | |
810 | drm_rect_debug_print("dst: ", &plane_state->dst, false); | |
811 | return -ERANGE; | |
812 | } | |
813 | ||
81af63a4 VS |
814 | if (crtc_state->enable) |
815 | drm_mode_get_hv_timing(&crtc_state->mode, &clip.x2, &clip.y2); | |
816 | ||
f96bdf56 | 817 | plane_state->visible = drm_rect_clip_scaled(src, dst, &clip); |
a01cb8ba VS |
818 | |
819 | drm_rect_rotate_inv(src, fb->width << 16, fb->height << 16, rotation); | |
820 | ||
821 | if (!plane_state->visible) | |
822 | /* | |
823 | * Plane isn't visible; some drivers can handle this | |
824 | * so we just return success here. Drivers that can't | |
825 | * (including those that use the primary plane helper's | |
826 | * update function) will return an error from their | |
827 | * update_plane handler. | |
828 | */ | |
829 | return 0; | |
830 | ||
81af63a4 | 831 | if (!can_position && !drm_rect_equals(dst, &clip)) { |
a01cb8ba VS |
832 | DRM_DEBUG_KMS("Plane must cover entire CRTC\n"); |
833 | drm_rect_debug_print("dst: ", dst, false); | |
81af63a4 | 834 | drm_rect_debug_print("clip: ", &clip, false); |
a01cb8ba VS |
835 | return -EINVAL; |
836 | } | |
837 | ||
838 | return 0; | |
839 | } | |
840 | EXPORT_SYMBOL(drm_atomic_helper_check_plane_state); | |
841 | ||
c2fcd274 | 842 | /** |
f98bd3ef | 843 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
844 | * @dev: DRM device |
845 | * @state: the driver state object | |
846 | * | |
847 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 | 848 | * This does all the plane update related checks using by calling into the |
6806cdf9 DV |
849 | * &drm_crtc_helper_funcs.atomic_check and &drm_plane_helper_funcs.atomic_check |
850 | * hooks provided by the driver. | |
c2fcd274 | 851 | * |
6806cdf9 | 852 | * It also sets &drm_crtc_state.planes_changed to indicate that a crtc has |
fc596660 ML |
853 | * updated planes. |
854 | * | |
c39032a8 | 855 | * RETURNS: |
c2fcd274 DV |
856 | * Zero for success or -errno |
857 | */ | |
d9b13620 DV |
858 | int |
859 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
860 | struct drm_atomic_state *state) | |
c2fcd274 | 861 | { |
df63b999 | 862 | struct drm_crtc *crtc; |
415c3ac3 | 863 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 864 | struct drm_plane *plane; |
415c3ac3 | 865 | struct drm_plane_state *new_plane_state, *old_plane_state; |
c2fcd274 DV |
866 | int i, ret = 0; |
867 | ||
415c3ac3 | 868 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { |
b5ceff20 | 869 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 870 | |
869e188a DV |
871 | WARN_ON(!drm_modeset_is_locked(&plane->mutex)); |
872 | ||
c2fcd274 DV |
873 | funcs = plane->helper_private; |
874 | ||
415c3ac3 | 875 | drm_atomic_helper_plane_changed(state, old_plane_state, new_plane_state, plane); |
c2fcd274 | 876 | |
d9778b40 DR |
877 | drm_atomic_helper_check_plane_damage(state, new_plane_state); |
878 | ||
c2fcd274 DV |
879 | if (!funcs || !funcs->atomic_check) |
880 | continue; | |
881 | ||
415c3ac3 | 882 | ret = funcs->atomic_check(plane, new_plane_state); |
c2fcd274 | 883 | if (ret) { |
9f4c97a2 VS |
884 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n", |
885 | plane->base.id, plane->name); | |
c2fcd274 DV |
886 | return ret; |
887 | } | |
888 | } | |
889 | ||
415c3ac3 | 890 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
b5ceff20 | 891 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
892 | |
893 | funcs = crtc->helper_private; | |
894 | ||
895 | if (!funcs || !funcs->atomic_check) | |
896 | continue; | |
897 | ||
415c3ac3 | 898 | ret = funcs->atomic_check(crtc, new_crtc_state); |
c2fcd274 | 899 | if (ret) { |
fa3ab4c2 VS |
900 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n", |
901 | crtc->base.id, crtc->name); | |
c2fcd274 DV |
902 | return ret; |
903 | } | |
904 | } | |
905 | ||
d9b13620 DV |
906 | return ret; |
907 | } | |
908 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
909 | ||
910 | /** | |
911 | * drm_atomic_helper_check - validate state object | |
912 | * @dev: DRM device | |
913 | * @state: the driver state object | |
914 | * | |
915 | * Check the state object to see if the requested state is physically possible. | |
916 | * Only crtcs and planes have check callbacks, so for any additional (global) | |
917 | * checking that a driver needs it can simply wrap that around this function. | |
6806cdf9 DV |
918 | * Drivers without such needs can directly use this as their |
919 | * &drm_mode_config_funcs.atomic_check callback. | |
d9b13620 | 920 | * |
b4274fbe DV |
921 | * This just wraps the two parts of the state checking for planes and modeset |
922 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
923 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
6806cdf9 DV |
924 | * @drm_plane_helper_funcs.atomic_check and @drm_crtc_helper_funcs.atomic_check |
925 | * functions depend upon an updated adjusted_mode.clock to e.g. properly compute | |
926 | * watermarks. | |
b4274fbe | 927 | * |
49efffc7 PU |
928 | * Note that zpos normalization will add all enable planes to the state which |
929 | * might not desired for some drivers. | |
930 | * For example enable/disable of a cursor plane which have fixed zpos value | |
931 | * would trigger all other enabled planes to be forced to the state change. | |
932 | * | |
c39032a8 | 933 | * RETURNS: |
d9b13620 DV |
934 | * Zero for success or -errno |
935 | */ | |
936 | int drm_atomic_helper_check(struct drm_device *dev, | |
937 | struct drm_atomic_state *state) | |
938 | { | |
939 | int ret; | |
940 | ||
b4274fbe | 941 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
942 | if (ret) |
943 | return ret; | |
944 | ||
49efffc7 PU |
945 | if (dev->mode_config.normalize_zpos) { |
946 | ret = drm_atomic_normalize_zpos(dev, state); | |
947 | if (ret) | |
948 | return ret; | |
949 | } | |
950 | ||
b4274fbe | 951 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
952 | if (ret) |
953 | return ret; | |
954 | ||
fef9df8b GP |
955 | if (state->legacy_cursor_update) |
956 | state->async_update = !drm_atomic_helper_async_check(dev, state); | |
957 | ||
1452c25b SP |
958 | drm_self_refresh_helper_alter_state(state); |
959 | ||
c2fcd274 DV |
960 | return ret; |
961 | } | |
962 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
963 | ||
1452c25b SP |
964 | static bool |
965 | crtc_needs_disable(struct drm_crtc_state *old_state, | |
966 | struct drm_crtc_state *new_state) | |
967 | { | |
968 | /* | |
969 | * No new_state means the crtc is off, so the only criteria is whether | |
970 | * it's currently active or in self refresh mode. | |
971 | */ | |
972 | if (!new_state) | |
973 | return drm_atomic_crtc_effectively_active(old_state); | |
974 | ||
975 | /* | |
976 | * We need to run through the crtc_funcs->disable() function if the crtc | |
977 | * is currently on, if it's transitioning to self refresh mode, or if | |
978 | * it's in self refresh mode and needs to be fully disabled. | |
979 | */ | |
980 | return old_state->active || | |
981 | (old_state->self_refresh_active && !new_state->enable) || | |
982 | new_state->self_refresh_active; | |
983 | } | |
984 | ||
623369e5 DV |
985 | static void |
986 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
987 | { | |
df63b999 | 988 | struct drm_connector *connector; |
415c3ac3 | 989 | struct drm_connector_state *old_conn_state, *new_conn_state; |
df63b999 | 990 | struct drm_crtc *crtc; |
415c3ac3 | 991 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
623369e5 DV |
992 | int i; |
993 | ||
415c3ac3 | 994 | for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) { |
b5ceff20 | 995 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
996 | struct drm_encoder *encoder; |
997 | ||
623369e5 DV |
998 | /* Shut down everything that's in the changeset and currently |
999 | * still on. So need to check the old, saved state. */ | |
df63b999 | 1000 | if (!old_conn_state->crtc) |
623369e5 DV |
1001 | continue; |
1002 | ||
b4d93679 | 1003 | old_crtc_state = drm_atomic_get_old_crtc_state(old_state, old_conn_state->crtc); |
eab3bbef | 1004 | |
1452c25b SP |
1005 | if (new_conn_state->crtc) |
1006 | new_crtc_state = drm_atomic_get_new_crtc_state( | |
1007 | old_state, | |
1008 | new_conn_state->crtc); | |
1009 | else | |
1010 | new_crtc_state = NULL; | |
1011 | ||
1012 | if (!crtc_needs_disable(old_crtc_state, new_crtc_state) || | |
2465ff62 | 1013 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) |
eab3bbef DV |
1014 | continue; |
1015 | ||
46df9adb | 1016 | encoder = old_conn_state->best_encoder; |
623369e5 | 1017 | |
46df9adb RC |
1018 | /* We shouldn't get this far if we didn't previously have |
1019 | * an encoder.. but WARN_ON() rather than explode. | |
1020 | */ | |
1021 | if (WARN_ON(!encoder)) | |
623369e5 DV |
1022 | continue; |
1023 | ||
1024 | funcs = encoder->helper_private; | |
1025 | ||
17a38d9c DV |
1026 | DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
1027 | encoder->base.id, encoder->name); | |
95d6eb3b | 1028 | |
623369e5 DV |
1029 | /* |
1030 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 1031 | * it away), so we won't call disable hooks twice. |
623369e5 | 1032 | */ |
5ade071b | 1033 | drm_atomic_bridge_disable(encoder->bridge, old_state); |
623369e5 DV |
1034 | |
1035 | /* Right function depends upon target state. */ | |
2827635e | 1036 | if (funcs) { |
43c76d72 SP |
1037 | if (funcs->atomic_disable) |
1038 | funcs->atomic_disable(encoder, old_state); | |
1039 | else if (new_conn_state->crtc && funcs->prepare) | |
2827635e NT |
1040 | funcs->prepare(encoder); |
1041 | else if (funcs->disable) | |
1042 | funcs->disable(encoder); | |
1043 | else if (funcs->dpms) | |
1044 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
1045 | } | |
623369e5 | 1046 | |
5ade071b | 1047 | drm_atomic_bridge_post_disable(encoder->bridge, old_state); |
623369e5 DV |
1048 | } |
1049 | ||
415c3ac3 | 1050 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
b5ceff20 | 1051 | const struct drm_crtc_helper_funcs *funcs; |
84014b0a | 1052 | int ret; |
623369e5 DV |
1053 | |
1054 | /* Shut down everything that needs a full modeset. */ | |
415c3ac3 | 1055 | if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) |
eab3bbef DV |
1056 | continue; |
1057 | ||
1452c25b | 1058 | if (!crtc_needs_disable(old_crtc_state, new_crtc_state)) |
623369e5 DV |
1059 | continue; |
1060 | ||
1061 | funcs = crtc->helper_private; | |
1062 | ||
fa3ab4c2 VS |
1063 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n", |
1064 | crtc->base.id, crtc->name); | |
95d6eb3b DV |
1065 | |
1066 | ||
623369e5 | 1067 | /* Right function depends upon target state. */ |
415c3ac3 | 1068 | if (new_crtc_state->enable && funcs->prepare) |
623369e5 | 1069 | funcs->prepare(crtc); |
c9ac8b4c LY |
1070 | else if (funcs->atomic_disable) |
1071 | funcs->atomic_disable(crtc, old_crtc_state); | |
623369e5 DV |
1072 | else if (funcs->disable) |
1073 | funcs->disable(crtc); | |
fe616928 | 1074 | else if (funcs->dpms) |
623369e5 | 1075 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); |
84014b0a DV |
1076 | |
1077 | if (!(dev->irq_enabled && dev->num_crtcs)) | |
1078 | continue; | |
1079 | ||
1080 | ret = drm_crtc_vblank_get(crtc); | |
1081 | WARN_ONCE(ret != -EINVAL, "driver forgot to call drm_crtc_vblank_off()\n"); | |
1082 | if (ret == 0) | |
1083 | drm_crtc_vblank_put(crtc); | |
623369e5 DV |
1084 | } |
1085 | } | |
1086 | ||
4c18d301 DV |
1087 | /** |
1088 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state | |
1089 | * @dev: DRM device | |
1090 | * @old_state: atomic state object with old state structures | |
1091 | * | |
1092 | * This function updates all the various legacy modeset state pointers in | |
1093 | * connectors, encoders and crtcs. It also updates the timestamping constants | |
1094 | * used for precise vblank timestamps by calling | |
1095 | * drm_calc_timestamping_constants(). | |
1096 | * | |
1097 | * Drivers can use this for building their own atomic commit if they don't have | |
1098 | * a pure helper-based modeset implementation. | |
2e2b96ef DV |
1099 | * |
1100 | * Since these updates are not synchronized with lockings, only code paths | |
1101 | * called from &drm_mode_config_helper_funcs.atomic_commit_tail can look at the | |
1102 | * legacy state filled out by this helper. Defacto this means this helper and | |
1103 | * the legacy state pointers are only really useful for transitioning an | |
1104 | * existing driver to the atomic world. | |
4c18d301 DV |
1105 | */ |
1106 | void | |
1107 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, | |
1108 | struct drm_atomic_state *old_state) | |
623369e5 | 1109 | { |
df63b999 | 1110 | struct drm_connector *connector; |
415c3ac3 | 1111 | struct drm_connector_state *old_conn_state, *new_conn_state; |
df63b999 | 1112 | struct drm_crtc *crtc; |
415c3ac3 | 1113 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
1114 | int i; |
1115 | ||
8c10342c | 1116 | /* clear out existing links and update dpms */ |
415c3ac3 | 1117 | for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) { |
8c10342c ML |
1118 | if (connector->encoder) { |
1119 | WARN_ON(!connector->encoder->crtc); | |
1120 | ||
1121 | connector->encoder->crtc = NULL; | |
1122 | connector->encoder = NULL; | |
1123 | } | |
623369e5 | 1124 | |
415c3ac3 | 1125 | crtc = new_conn_state->crtc; |
8c10342c ML |
1126 | if ((!crtc && old_conn_state->crtc) || |
1127 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { | |
8c10342c | 1128 | int mode = DRM_MODE_DPMS_OFF; |
623369e5 | 1129 | |
8c10342c ML |
1130 | if (crtc && crtc->state->active) |
1131 | mode = DRM_MODE_DPMS_ON; | |
1132 | ||
1133 | connector->dpms = mode; | |
8c10342c | 1134 | } |
623369e5 DV |
1135 | } |
1136 | ||
1137 | /* set new links */ | |
415c3ac3 ML |
1138 | for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { |
1139 | if (!new_conn_state->crtc) | |
623369e5 DV |
1140 | continue; |
1141 | ||
415c3ac3 | 1142 | if (WARN_ON(!new_conn_state->best_encoder)) |
623369e5 DV |
1143 | continue; |
1144 | ||
415c3ac3 ML |
1145 | connector->encoder = new_conn_state->best_encoder; |
1146 | connector->encoder->crtc = new_conn_state->crtc; | |
623369e5 DV |
1147 | } |
1148 | ||
1149 | /* set legacy state in the crtc structure */ | |
415c3ac3 | 1150 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { |
2660801f | 1151 | struct drm_plane *primary = crtc->primary; |
b4d93679 | 1152 | struct drm_plane_state *new_plane_state; |
2660801f | 1153 | |
415c3ac3 ML |
1154 | crtc->mode = new_crtc_state->mode; |
1155 | crtc->enabled = new_crtc_state->enable; | |
2660801f | 1156 | |
b4d93679 ML |
1157 | new_plane_state = |
1158 | drm_atomic_get_new_plane_state(old_state, primary); | |
1159 | ||
1160 | if (new_plane_state && new_plane_state->crtc == crtc) { | |
1161 | crtc->x = new_plane_state->src_x >> 16; | |
1162 | crtc->y = new_plane_state->src_y >> 16; | |
2660801f | 1163 | } |
3d51d2d2 | 1164 | |
415c3ac3 | 1165 | if (new_crtc_state->enable) |
3d51d2d2 | 1166 | drm_calc_timestamping_constants(crtc, |
415c3ac3 | 1167 | &new_crtc_state->adjusted_mode); |
623369e5 DV |
1168 | } |
1169 | } | |
4c18d301 | 1170 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); |
623369e5 DV |
1171 | |
1172 | static void | |
1173 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
1174 | { | |
df63b999 | 1175 | struct drm_crtc *crtc; |
415c3ac3 | 1176 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 1177 | struct drm_connector *connector; |
415c3ac3 | 1178 | struct drm_connector_state *new_conn_state; |
623369e5 DV |
1179 | int i; |
1180 | ||
415c3ac3 | 1181 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { |
b5ceff20 | 1182 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 1183 | |
415c3ac3 | 1184 | if (!new_crtc_state->mode_changed) |
623369e5 DV |
1185 | continue; |
1186 | ||
1187 | funcs = crtc->helper_private; | |
1188 | ||
415c3ac3 | 1189 | if (new_crtc_state->enable && funcs->mode_set_nofb) { |
fa3ab4c2 VS |
1190 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n", |
1191 | crtc->base.id, crtc->name); | |
95d6eb3b | 1192 | |
623369e5 | 1193 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 1194 | } |
623369e5 DV |
1195 | } |
1196 | ||
415c3ac3 | 1197 | for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { |
b5ceff20 | 1198 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
1199 | struct drm_encoder *encoder; |
1200 | struct drm_display_mode *mode, *adjusted_mode; | |
1201 | ||
415c3ac3 | 1202 | if (!new_conn_state->best_encoder) |
623369e5 DV |
1203 | continue; |
1204 | ||
415c3ac3 | 1205 | encoder = new_conn_state->best_encoder; |
623369e5 | 1206 | funcs = encoder->helper_private; |
415c3ac3 | 1207 | new_crtc_state = new_conn_state->crtc->state; |
623369e5 DV |
1208 | mode = &new_crtc_state->mode; |
1209 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
1210 | ||
eab3bbef DV |
1211 | if (!new_crtc_state->mode_changed) |
1212 | continue; | |
1213 | ||
17a38d9c DV |
1214 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
1215 | encoder->base.id, encoder->name); | |
95d6eb3b | 1216 | |
623369e5 DV |
1217 | /* |
1218 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 1219 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 1220 | */ |
fe4a11c9 PZ |
1221 | if (funcs && funcs->atomic_mode_set) { |
1222 | funcs->atomic_mode_set(encoder, new_crtc_state, | |
415c3ac3 | 1223 | new_conn_state); |
fe4a11c9 | 1224 | } else if (funcs && funcs->mode_set) { |
c982bd90 | 1225 | funcs->mode_set(encoder, mode, adjusted_mode); |
fe4a11c9 | 1226 | } |
623369e5 | 1227 | |
862e686c | 1228 | drm_bridge_mode_set(encoder->bridge, mode, adjusted_mode); |
623369e5 DV |
1229 | } |
1230 | } | |
1231 | ||
1232 | /** | |
1af434a9 | 1233 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 1234 | * @dev: DRM device |
a072f809 | 1235 | * @old_state: atomic state object with old state structures |
623369e5 | 1236 | * |
1af434a9 | 1237 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 1238 | * prepares them (if required) with the new mode. |
1af434a9 | 1239 | * |
60acc4eb | 1240 | * For compatibility with legacy crtc helpers this should be called before |
1af434a9 DV |
1241 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
1242 | * does. But drivers with different needs can group the modeset commits together | |
1243 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
1244 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 1245 | */ |
1af434a9 DV |
1246 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
1247 | struct drm_atomic_state *old_state) | |
623369e5 | 1248 | { |
a072f809 | 1249 | disable_outputs(dev, old_state); |
4c18d301 DV |
1250 | |
1251 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); | |
1252 | ||
a072f809 | 1253 | crtc_set_mode(dev, old_state); |
623369e5 | 1254 | } |
1af434a9 | 1255 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 | 1256 | |
935774cd BS |
1257 | static void drm_atomic_helper_commit_writebacks(struct drm_device *dev, |
1258 | struct drm_atomic_state *old_state) | |
1259 | { | |
1260 | struct drm_connector *connector; | |
1261 | struct drm_connector_state *new_conn_state; | |
1262 | int i; | |
1263 | ||
1264 | for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { | |
1265 | const struct drm_connector_helper_funcs *funcs; | |
1266 | ||
1267 | funcs = connector->helper_private; | |
814bde99 BB |
1268 | if (!funcs->atomic_commit) |
1269 | continue; | |
935774cd BS |
1270 | |
1271 | if (new_conn_state->writeback_job && new_conn_state->writeback_job->fb) { | |
1272 | WARN_ON(connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK); | |
425132fd | 1273 | funcs->atomic_commit(connector, new_conn_state); |
935774cd BS |
1274 | } |
1275 | } | |
1276 | } | |
1277 | ||
623369e5 | 1278 | /** |
1af434a9 | 1279 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
1280 | * @dev: DRM device |
1281 | * @old_state: atomic state object with old state structures | |
1282 | * | |
1af434a9 DV |
1283 | * This function enables all the outputs with the new configuration which had to |
1284 | * be turned off for the update. | |
1285 | * | |
60acc4eb | 1286 | * For compatibility with legacy crtc helpers this should be called after |
1af434a9 DV |
1287 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
1288 | * does. But drivers with different needs can group the modeset commits together | |
1289 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
1290 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 1291 | */ |
1af434a9 DV |
1292 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
1293 | struct drm_atomic_state *old_state) | |
623369e5 | 1294 | { |
df63b999 | 1295 | struct drm_crtc *crtc; |
0b20a0f8 | 1296 | struct drm_crtc_state *old_crtc_state; |
415c3ac3 | 1297 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 1298 | struct drm_connector *connector; |
415c3ac3 | 1299 | struct drm_connector_state *new_conn_state; |
623369e5 DV |
1300 | int i; |
1301 | ||
0b20a0f8 | 1302 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
b5ceff20 | 1303 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
1304 | |
1305 | /* Need to filter out CRTCs where only planes change. */ | |
415c3ac3 | 1306 | if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) |
eab3bbef DV |
1307 | continue; |
1308 | ||
415c3ac3 | 1309 | if (!new_crtc_state->active) |
623369e5 DV |
1310 | continue; |
1311 | ||
1312 | funcs = crtc->helper_private; | |
1313 | ||
415c3ac3 | 1314 | if (new_crtc_state->enable) { |
fa3ab4c2 VS |
1315 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n", |
1316 | crtc->base.id, crtc->name); | |
0b20a0f8 LP |
1317 | if (funcs->atomic_enable) |
1318 | funcs->atomic_enable(crtc, old_crtc_state); | |
fe616928 | 1319 | else if (funcs->commit) |
ee0a89cf DV |
1320 | funcs->commit(crtc); |
1321 | } | |
623369e5 DV |
1322 | } |
1323 | ||
415c3ac3 | 1324 | for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { |
b5ceff20 | 1325 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
1326 | struct drm_encoder *encoder; |
1327 | ||
415c3ac3 | 1328 | if (!new_conn_state->best_encoder) |
623369e5 DV |
1329 | continue; |
1330 | ||
415c3ac3 ML |
1331 | if (!new_conn_state->crtc->state->active || |
1332 | !drm_atomic_crtc_needs_modeset(new_conn_state->crtc->state)) | |
eab3bbef DV |
1333 | continue; |
1334 | ||
415c3ac3 | 1335 | encoder = new_conn_state->best_encoder; |
623369e5 DV |
1336 | funcs = encoder->helper_private; |
1337 | ||
17a38d9c DV |
1338 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
1339 | encoder->base.id, encoder->name); | |
95d6eb3b | 1340 | |
623369e5 DV |
1341 | /* |
1342 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 1343 | * it away), so we won't call enable hooks twice. |
623369e5 | 1344 | */ |
5ade071b | 1345 | drm_atomic_bridge_pre_enable(encoder->bridge, old_state); |
623369e5 | 1346 | |
2827635e | 1347 | if (funcs) { |
43c76d72 SP |
1348 | if (funcs->atomic_enable) |
1349 | funcs->atomic_enable(encoder, old_state); | |
1350 | else if (funcs->enable) | |
2827635e NT |
1351 | funcs->enable(encoder); |
1352 | else if (funcs->commit) | |
1353 | funcs->commit(encoder); | |
1354 | } | |
623369e5 | 1355 | |
5ade071b | 1356 | drm_atomic_bridge_enable(encoder->bridge, old_state); |
623369e5 | 1357 | } |
935774cd BS |
1358 | |
1359 | drm_atomic_helper_commit_writebacks(dev, old_state); | |
623369e5 | 1360 | } |
1af434a9 | 1361 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 1362 | |
4c5b7f3a RC |
1363 | /** |
1364 | * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state | |
1365 | * @dev: DRM device | |
1366 | * @state: atomic state object with old state structures | |
1ea0c02e DV |
1367 | * @pre_swap: If true, do an interruptible wait, and @state is the new state. |
1368 | * Otherwise @state is the old state. | |
4c5b7f3a RC |
1369 | * |
1370 | * For implicit sync, driver should fish the exclusive fence out from the | |
1371 | * incoming fb's and stash it in the drm_plane_state. This is called after | |
1372 | * drm_atomic_helper_swap_state() so it uses the current plane state (and | |
1373 | * just uses the atomic state to find the changed planes) | |
f6ce410a | 1374 | * |
1ea0c02e DV |
1375 | * Note that @pre_swap is needed since the point where we block for fences moves |
1376 | * around depending upon whether an atomic commit is blocking or | |
42590372 GP |
1377 | * non-blocking. For non-blocking commit all waiting needs to happen after |
1378 | * drm_atomic_helper_swap_state() is called, but for blocking commits we want | |
1ea0c02e DV |
1379 | * to wait **before** we do anything that can't be easily rolled back. That is |
1380 | * before we call drm_atomic_helper_swap_state(). | |
1381 | * | |
f54d1867 | 1382 | * Returns zero if success or < 0 if dma_fence_wait() fails. |
4c5b7f3a | 1383 | */ |
f6ce410a GP |
1384 | int drm_atomic_helper_wait_for_fences(struct drm_device *dev, |
1385 | struct drm_atomic_state *state, | |
1386 | bool pre_swap) | |
e2330f07 | 1387 | { |
df63b999 | 1388 | struct drm_plane *plane; |
415c3ac3 | 1389 | struct drm_plane_state *new_plane_state; |
f6ce410a | 1390 | int i, ret; |
e2330f07 | 1391 | |
415c3ac3 ML |
1392 | for_each_new_plane_in_state(state, plane, new_plane_state, i) { |
1393 | if (!new_plane_state->fence) | |
e2330f07 DV |
1394 | continue; |
1395 | ||
415c3ac3 | 1396 | WARN_ON(!new_plane_state->fb); |
f6ce410a GP |
1397 | |
1398 | /* | |
1399 | * If waiting for fences pre-swap (ie: nonblock), userspace can | |
1400 | * still interrupt the operation. Instead of blocking until the | |
1401 | * timer expires, make the wait interruptible. | |
1402 | */ | |
415c3ac3 | 1403 | ret = dma_fence_wait(new_plane_state->fence, pre_swap); |
f6ce410a GP |
1404 | if (ret) |
1405 | return ret; | |
e2330f07 | 1406 | |
415c3ac3 ML |
1407 | dma_fence_put(new_plane_state->fence); |
1408 | new_plane_state->fence = NULL; | |
e2330f07 | 1409 | } |
f6ce410a GP |
1410 | |
1411 | return 0; | |
e2330f07 | 1412 | } |
4c5b7f3a | 1413 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences); |
e2330f07 | 1414 | |
5ee3229c RC |
1415 | /** |
1416 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on crtcs | |
1417 | * @dev: DRM device | |
1418 | * @old_state: atomic state object with old state structures | |
1419 | * | |
1420 | * Helper to, after atomic commit, wait for vblanks on all effected | |
1421 | * crtcs (ie. before cleaning up old framebuffers using | |
01086487 | 1422 | * drm_atomic_helper_cleanup_planes()). It will only wait on CRTCs where the |
ab58e338 DV |
1423 | * framebuffers have actually changed to optimize for the legacy cursor and |
1424 | * plane update use-case. | |
01086487 BB |
1425 | * |
1426 | * Drivers using the nonblocking commit tracking support initialized by calling | |
1427 | * drm_atomic_helper_setup_commit() should look at | |
1428 | * drm_atomic_helper_wait_for_flip_done() as an alternative. | |
5ee3229c RC |
1429 | */ |
1430 | void | |
1431 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
1432 | struct drm_atomic_state *old_state) | |
623369e5 DV |
1433 | { |
1434 | struct drm_crtc *crtc; | |
415c3ac3 | 1435 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
623369e5 | 1436 | int i, ret; |
bdc57146 | 1437 | unsigned crtc_mask = 0; |
623369e5 | 1438 | |
bdc57146 ML |
1439 | /* |
1440 | * Legacy cursor ioctls are completely unsynced, and userspace | |
1441 | * relies on that (by doing tons of cursor updates). | |
1442 | */ | |
1443 | if (old_state->legacy_cursor_update) | |
1444 | return; | |
623369e5 | 1445 | |
415c3ac3 | 1446 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
a76dfe35 | 1447 | if (!new_crtc_state->active) |
ab58e338 DV |
1448 | continue; |
1449 | ||
623369e5 DV |
1450 | ret = drm_crtc_vblank_get(crtc); |
1451 | if (ret != 0) | |
1452 | continue; | |
1453 | ||
bdc57146 ML |
1454 | crtc_mask |= drm_crtc_mask(crtc); |
1455 | old_state->crtcs[i].last_vblank_count = drm_crtc_vblank_count(crtc); | |
623369e5 DV |
1456 | } |
1457 | ||
415c3ac3 | 1458 | for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
bdc57146 | 1459 | if (!(crtc_mask & drm_crtc_mask(crtc))) |
623369e5 DV |
1460 | continue; |
1461 | ||
1462 | ret = wait_event_timeout(dev->vblank[i].queue, | |
bdc57146 | 1463 | old_state->crtcs[i].last_vblank_count != |
d4853630 | 1464 | drm_crtc_vblank_count(crtc), |
b3198c38 | 1465 | msecs_to_jiffies(100)); |
623369e5 | 1466 | |
6ac7c548 RK |
1467 | WARN(!ret, "[CRTC:%d:%s] vblank wait timed out\n", |
1468 | crtc->base.id, crtc->name); | |
8d4d0d70 | 1469 | |
623369e5 DV |
1470 | drm_crtc_vblank_put(crtc); |
1471 | } | |
1472 | } | |
5ee3229c | 1473 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 | 1474 | |
01086487 BB |
1475 | /** |
1476 | * drm_atomic_helper_wait_for_flip_done - wait for all page flips to be done | |
1477 | * @dev: DRM device | |
1478 | * @old_state: atomic state object with old state structures | |
1479 | * | |
1480 | * Helper to, after atomic commit, wait for page flips on all effected | |
1481 | * crtcs (ie. before cleaning up old framebuffers using | |
1482 | * drm_atomic_helper_cleanup_planes()). Compared to | |
1483 | * drm_atomic_helper_wait_for_vblanks() this waits for the completion of on all | |
1484 | * CRTCs, assuming that cursors-only updates are signalling their completion | |
1485 | * immediately (or using a different path). | |
1486 | * | |
1487 | * This requires that drivers use the nonblocking commit tracking support | |
1488 | * initialized using drm_atomic_helper_setup_commit(). | |
1489 | */ | |
1490 | void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev, | |
1491 | struct drm_atomic_state *old_state) | |
1492 | { | |
01086487 BB |
1493 | struct drm_crtc *crtc; |
1494 | int i; | |
1495 | ||
4364bcb2 LL |
1496 | for (i = 0; i < dev->mode_config.num_crtc; i++) { |
1497 | struct drm_crtc_commit *commit = old_state->crtcs[i].commit; | |
01086487 BB |
1498 | int ret; |
1499 | ||
4364bcb2 LL |
1500 | crtc = old_state->crtcs[i].ptr; |
1501 | ||
1502 | if (!crtc || !commit) | |
01086487 BB |
1503 | continue; |
1504 | ||
1505 | ret = wait_for_completion_timeout(&commit->flip_done, 10 * HZ); | |
1506 | if (ret == 0) | |
1507 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
1508 | crtc->base.id, crtc->name); | |
1509 | } | |
2de42f79 VS |
1510 | |
1511 | if (old_state->fake_commit) | |
1512 | complete_all(&old_state->fake_commit->flip_done); | |
01086487 BB |
1513 | } |
1514 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_flip_done); | |
1515 | ||
623369e5 | 1516 | /** |
9f2a7950 | 1517 | * drm_atomic_helper_commit_tail - commit atomic update to hardware |
1ea0c02e | 1518 | * @old_state: atomic state object with old state structures |
623369e5 | 1519 | * |
6806cdf9 | 1520 | * This is the default implementation for the |
81a099ac MR |
1521 | * &drm_mode_config_helper_funcs.atomic_commit_tail hook, for drivers |
1522 | * that do not support runtime_pm or do not need the CRTC to be | |
1523 | * enabled to perform a commit. Otherwise, see | |
1524 | * drm_atomic_helper_commit_tail_rpm(). | |
623369e5 | 1525 | * |
9f2a7950 | 1526 | * Note that the default ordering of how the various stages are called is to |
81a099ac | 1527 | * match the legacy modeset helper library closest. |
9f2a7950 | 1528 | */ |
1ea0c02e | 1529 | void drm_atomic_helper_commit_tail(struct drm_atomic_state *old_state) |
9f2a7950 | 1530 | { |
1ea0c02e | 1531 | struct drm_device *dev = old_state->dev; |
9f2a7950 | 1532 | |
1ea0c02e | 1533 | drm_atomic_helper_commit_modeset_disables(dev, old_state); |
9f2a7950 | 1534 | |
1ea0c02e | 1535 | drm_atomic_helper_commit_planes(dev, old_state, 0); |
9f2a7950 | 1536 | |
1ea0c02e | 1537 | drm_atomic_helper_commit_modeset_enables(dev, old_state); |
9f2a7950 | 1538 | |
6fb42b66 BB |
1539 | drm_atomic_helper_fake_vblank(old_state); |
1540 | ||
1ea0c02e | 1541 | drm_atomic_helper_commit_hw_done(old_state); |
9f2a7950 | 1542 | |
1ea0c02e | 1543 | drm_atomic_helper_wait_for_vblanks(dev, old_state); |
9f2a7950 | 1544 | |
1ea0c02e | 1545 | drm_atomic_helper_cleanup_planes(dev, old_state); |
9f2a7950 DV |
1546 | } |
1547 | EXPORT_SYMBOL(drm_atomic_helper_commit_tail); | |
1548 | ||
81a099ac MR |
1549 | /** |
1550 | * drm_atomic_helper_commit_tail_rpm - commit atomic update to hardware | |
1551 | * @old_state: new modeset state to be committed | |
1552 | * | |
1553 | * This is an alternative implementation for the | |
1554 | * &drm_mode_config_helper_funcs.atomic_commit_tail hook, for drivers | |
1555 | * that support runtime_pm or need the CRTC to be enabled to perform a | |
1556 | * commit. Otherwise, one should use the default implementation | |
1557 | * drm_atomic_helper_commit_tail(). | |
1558 | */ | |
1559 | void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_state *old_state) | |
1560 | { | |
1561 | struct drm_device *dev = old_state->dev; | |
1562 | ||
1563 | drm_atomic_helper_commit_modeset_disables(dev, old_state); | |
1564 | ||
1565 | drm_atomic_helper_commit_modeset_enables(dev, old_state); | |
1566 | ||
1567 | drm_atomic_helper_commit_planes(dev, old_state, | |
1568 | DRM_PLANE_COMMIT_ACTIVE_ONLY); | |
1569 | ||
6fb42b66 BB |
1570 | drm_atomic_helper_fake_vblank(old_state); |
1571 | ||
81a099ac MR |
1572 | drm_atomic_helper_commit_hw_done(old_state); |
1573 | ||
1574 | drm_atomic_helper_wait_for_vblanks(dev, old_state); | |
1575 | ||
1576 | drm_atomic_helper_cleanup_planes(dev, old_state); | |
1577 | } | |
1578 | EXPORT_SYMBOL(drm_atomic_helper_commit_tail_rpm); | |
1579 | ||
1ea0c02e | 1580 | static void commit_tail(struct drm_atomic_state *old_state) |
9f2a7950 | 1581 | { |
1ea0c02e | 1582 | struct drm_device *dev = old_state->dev; |
a4b10cce | 1583 | const struct drm_mode_config_helper_funcs *funcs; |
9f2a7950 DV |
1584 | |
1585 | funcs = dev->mode_config.helper_private; | |
1586 | ||
1ea0c02e | 1587 | drm_atomic_helper_wait_for_fences(dev, old_state, false); |
9f2a7950 | 1588 | |
1ea0c02e | 1589 | drm_atomic_helper_wait_for_dependencies(old_state); |
9f2a7950 DV |
1590 | |
1591 | if (funcs && funcs->atomic_commit_tail) | |
1ea0c02e | 1592 | funcs->atomic_commit_tail(old_state); |
9f2a7950 | 1593 | else |
1ea0c02e | 1594 | drm_atomic_helper_commit_tail(old_state); |
9f2a7950 | 1595 | |
1ea0c02e | 1596 | drm_atomic_helper_commit_cleanup_done(old_state); |
9f2a7950 | 1597 | |
1ea0c02e | 1598 | drm_atomic_state_put(old_state); |
9f2a7950 DV |
1599 | } |
1600 | ||
1601 | static void commit_work(struct work_struct *work) | |
1602 | { | |
1603 | struct drm_atomic_state *state = container_of(work, | |
1604 | struct drm_atomic_state, | |
1605 | commit_work); | |
1606 | commit_tail(state); | |
1607 | } | |
1608 | ||
fef9df8b GP |
1609 | /** |
1610 | * drm_atomic_helper_async_check - check if state can be commited asynchronously | |
1611 | * @dev: DRM device | |
1612 | * @state: the driver state object | |
1613 | * | |
1614 | * This helper will check if it is possible to commit the state asynchronously. | |
1615 | * Async commits are not supposed to swap the states like normal sync commits | |
1616 | * but just do in-place changes on the current state. | |
1617 | * | |
1618 | * It will return 0 if the commit can happen in an asynchronous fashion or error | |
1619 | * if not. Note that error just mean it can't be commited asynchronously, if it | |
1620 | * fails the commit should be treated like a normal synchronous commit. | |
1621 | */ | |
1622 | int drm_atomic_helper_async_check(struct drm_device *dev, | |
1623 | struct drm_atomic_state *state) | |
1624 | { | |
1625 | struct drm_crtc *crtc; | |
1626 | struct drm_crtc_state *crtc_state; | |
de2d8db3 BB |
1627 | struct drm_plane *plane = NULL; |
1628 | struct drm_plane_state *old_plane_state = NULL; | |
1629 | struct drm_plane_state *new_plane_state = NULL; | |
fef9df8b | 1630 | const struct drm_plane_helper_funcs *funcs; |
669c9215 | 1631 | int i, n_planes = 0; |
fef9df8b GP |
1632 | |
1633 | for_each_new_crtc_in_state(state, crtc, crtc_state, i) { | |
1634 | if (drm_atomic_crtc_needs_modeset(crtc_state)) | |
1635 | return -EINVAL; | |
1636 | } | |
1637 | ||
669c9215 | 1638 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) |
fef9df8b | 1639 | n_planes++; |
fef9df8b GP |
1640 | |
1641 | /* FIXME: we support only single plane updates for now */ | |
669c9215 | 1642 | if (n_planes != 1) |
fef9df8b GP |
1643 | return -EINVAL; |
1644 | ||
603ba2df BB |
1645 | if (!new_plane_state->crtc || |
1646 | old_plane_state->crtc != new_plane_state->crtc) | |
fef9df8b GP |
1647 | return -EINVAL; |
1648 | ||
1649 | funcs = plane->helper_private; | |
1650 | if (!funcs->atomic_async_update) | |
1651 | return -EINVAL; | |
1652 | ||
669c9215 | 1653 | if (new_plane_state->fence) |
fef9df8b GP |
1654 | return -EINVAL; |
1655 | ||
1656 | /* | |
1657 | * Don't do an async update if there is an outstanding commit modifying | |
1658 | * the plane. This prevents our async update's changes from getting | |
1659 | * overridden by a previous synchronous update's state. | |
1660 | */ | |
669c9215 ML |
1661 | if (old_plane_state->commit && |
1662 | !try_wait_for_completion(&old_plane_state->commit->hw_done)) | |
1663 | return -EBUSY; | |
fef9df8b | 1664 | |
669c9215 | 1665 | return funcs->atomic_async_check(plane, new_plane_state); |
fef9df8b GP |
1666 | } |
1667 | EXPORT_SYMBOL(drm_atomic_helper_async_check); | |
1668 | ||
1669 | /** | |
1670 | * drm_atomic_helper_async_commit - commit state asynchronously | |
1671 | * @dev: DRM device | |
1672 | * @state: the driver state object | |
1673 | * | |
1674 | * This function commits a state asynchronously, i.e., not vblank | |
1675 | * synchronized. It should be used on a state only when | |
1676 | * drm_atomic_async_check() succeeds. Async commits are not supposed to swap | |
1677 | * the states like normal sync commits, but just do in-place changes on the | |
1678 | * current state. | |
89a4aac0 HK |
1679 | * |
1680 | * TODO: Implement full swap instead of doing in-place changes. | |
fef9df8b GP |
1681 | */ |
1682 | void drm_atomic_helper_async_commit(struct drm_device *dev, | |
1683 | struct drm_atomic_state *state) | |
1684 | { | |
1685 | struct drm_plane *plane; | |
1686 | struct drm_plane_state *plane_state; | |
1687 | const struct drm_plane_helper_funcs *funcs; | |
1688 | int i; | |
1689 | ||
1690 | for_each_new_plane_in_state(state, plane, plane_state, i) { | |
89a4aac0 HK |
1691 | struct drm_framebuffer *new_fb = plane_state->fb; |
1692 | struct drm_framebuffer *old_fb = plane->state->fb; | |
1693 | ||
fef9df8b GP |
1694 | funcs = plane->helper_private; |
1695 | funcs->atomic_async_update(plane, plane_state); | |
02edfd9c BB |
1696 | |
1697 | /* | |
1698 | * ->atomic_async_update() is supposed to update the | |
1699 | * plane->state in-place, make sure at least common | |
1700 | * properties have been properly updated. | |
1701 | */ | |
89a4aac0 | 1702 | WARN_ON_ONCE(plane->state->fb != new_fb); |
02edfd9c BB |
1703 | WARN_ON_ONCE(plane->state->crtc_x != plane_state->crtc_x); |
1704 | WARN_ON_ONCE(plane->state->crtc_y != plane_state->crtc_y); | |
1705 | WARN_ON_ONCE(plane->state->src_x != plane_state->src_x); | |
1706 | WARN_ON_ONCE(plane->state->src_y != plane_state->src_y); | |
89a4aac0 HK |
1707 | |
1708 | /* | |
1709 | * Make sure the FBs have been swapped so that cleanups in the | |
1710 | * new_state performs a cleanup in the old FB. | |
1711 | */ | |
1712 | WARN_ON_ONCE(plane_state->fb != old_fb); | |
fef9df8b GP |
1713 | } |
1714 | } | |
1715 | EXPORT_SYMBOL(drm_atomic_helper_async_commit); | |
1716 | ||
9f2a7950 DV |
1717 | /** |
1718 | * drm_atomic_helper_commit - commit validated state object | |
1719 | * @dev: DRM device | |
1720 | * @state: the driver state object | |
1721 | * @nonblock: whether nonblocking behavior is requested. | |
1722 | * | |
1723 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
1724 | * object. This can still fail when e.g. the framebuffer reservation fails. This | |
1725 | * function implements nonblocking commits, using | |
1726 | * drm_atomic_helper_setup_commit() and related functions. | |
1727 | * | |
9f2a7950 | 1728 | * Committing the actual hardware state is done through the |
1e55a53a | 1729 | * &drm_mode_config_helper_funcs.atomic_commit_tail callback, or its default |
6806cdf9 | 1730 | * implementation drm_atomic_helper_commit_tail(). |
6e48ae32 | 1731 | * |
c39032a8 | 1732 | * RETURNS: |
623369e5 DV |
1733 | * Zero for success or -errno. |
1734 | */ | |
1735 | int drm_atomic_helper_commit(struct drm_device *dev, | |
1736 | struct drm_atomic_state *state, | |
286dbb8d | 1737 | bool nonblock) |
623369e5 DV |
1738 | { |
1739 | int ret; | |
1740 | ||
fef9df8b GP |
1741 | if (state->async_update) { |
1742 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
1743 | if (ret) | |
1744 | return ret; | |
1745 | ||
1746 | drm_atomic_helper_async_commit(dev, state); | |
1747 | drm_atomic_helper_cleanup_planes(dev, state); | |
1748 | ||
1749 | return 0; | |
1750 | } | |
1751 | ||
a095caa7 DV |
1752 | ret = drm_atomic_helper_setup_commit(state, nonblock); |
1753 | if (ret) | |
1754 | return ret; | |
1755 | ||
9f2a7950 DV |
1756 | INIT_WORK(&state->commit_work, commit_work); |
1757 | ||
623369e5 DV |
1758 | ret = drm_atomic_helper_prepare_planes(dev, state); |
1759 | if (ret) | |
1760 | return ret; | |
1761 | ||
f6ce410a GP |
1762 | if (!nonblock) { |
1763 | ret = drm_atomic_helper_wait_for_fences(dev, state, true); | |
c066d231 ML |
1764 | if (ret) |
1765 | goto err; | |
f6ce410a GP |
1766 | } |
1767 | ||
623369e5 DV |
1768 | /* |
1769 | * This is the point of no return - everything below never fails except | |
1770 | * when the hw goes bonghits. Which means we can commit the new state on | |
1771 | * the software side now. | |
1772 | */ | |
1773 | ||
c066d231 ML |
1774 | ret = drm_atomic_helper_swap_state(state, true); |
1775 | if (ret) | |
1776 | goto err; | |
623369e5 DV |
1777 | |
1778 | /* | |
1779 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 1780 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
1781 | * that the asynchronous work has either been cancelled (if the driver |
1782 | * supports it, which at least requires that the framebuffers get | |
1783 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
1784 | * before the new state gets committed on the software side with | |
1785 | * drm_atomic_helper_swap_state(). | |
1786 | * | |
1787 | * This scheme allows new atomic state updates to be prepared and | |
1788 | * checked in parallel to the asynchronous completion of the previous | |
1789 | * update. Which is important since compositors need to figure out the | |
1790 | * composition of the next frame right after having submitted the | |
1791 | * current layout. | |
9f2a7950 DV |
1792 | * |
1793 | * NOTE: Commit work has multiple phases, first hardware commit, then | |
1794 | * cleanup. We want them to overlap, hence need system_unbound_wq to | |
a0689e34 | 1795 | * make sure work items don't artificially stall on each another. |
623369e5 DV |
1796 | */ |
1797 | ||
0853695c | 1798 | drm_atomic_state_get(state); |
9f2a7950 DV |
1799 | if (nonblock) |
1800 | queue_work(system_unbound_wq, &state->commit_work); | |
1801 | else | |
1802 | commit_tail(state); | |
623369e5 DV |
1803 | |
1804 | return 0; | |
c066d231 ML |
1805 | |
1806 | err: | |
1807 | drm_atomic_helper_cleanup_planes(dev, state); | |
1808 | return ret; | |
623369e5 DV |
1809 | } |
1810 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1811 | ||
e8c833a7 | 1812 | /** |
286dbb8d | 1813 | * DOC: implementing nonblocking commit |
e8c833a7 | 1814 | * |
9f2a7950 | 1815 | * Nonblocking atomic commits have to be implemented in the following sequence: |
e8c833a7 DV |
1816 | * |
1817 | * 1. Run drm_atomic_helper_prepare_planes() first. This is the only function | |
1818 | * which commit needs to call which can fail, so we want to run it first and | |
1819 | * synchronously. | |
1820 | * | |
286dbb8d | 1821 | * 2. Synchronize with any outstanding nonblocking commit worker threads which |
e8c833a7 DV |
1822 | * might be affected the new state update. This can be done by either cancelling |
1823 | * or flushing the work items, depending upon whether the driver can deal with | |
1824 | * cancelled updates. Note that it is important to ensure that the framebuffer | |
1825 | * cleanup is still done when cancelling. | |
1826 | * | |
9f2a7950 DV |
1827 | * Asynchronous workers need to have sufficient parallelism to be able to run |
1828 | * different atomic commits on different CRTCs in parallel. The simplest way to | |
a0689e34 | 1829 | * achieve this is by running them on the &system_unbound_wq work queue. Note |
9f2a7950 DV |
1830 | * that drivers are not required to split up atomic commits and run an |
1831 | * individual commit in parallel - userspace is supposed to do that if it cares. | |
1832 | * But it might be beneficial to do that for modesets, since those necessarily | |
1833 | * must be done as one global operation, and enabling or disabling a CRTC can | |
1834 | * take a long time. But even that is not required. | |
e8c833a7 DV |
1835 | * |
1836 | * 3. The software state is updated synchronously with | |
26196f7e | 1837 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
e8c833a7 | 1838 | * locks means concurrent callers never see inconsistent state. And doing this |
286dbb8d ML |
1839 | * while it's guaranteed that no relevant nonblocking worker runs means that |
1840 | * nonblocking workers do not need grab any locks. Actually they must not grab | |
1841 | * locks, for otherwise the work flushing will deadlock. | |
e8c833a7 DV |
1842 | * |
1843 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1844 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1845 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
1846 | * being displayed. | |
9f2a7950 DV |
1847 | * |
1848 | * The above scheme is implemented in the atomic helper libraries in | |
1849 | * drm_atomic_helper_commit() using a bunch of helper functions. See | |
1850 | * drm_atomic_helper_setup_commit() for a starting point. | |
e8c833a7 DV |
1851 | */ |
1852 | ||
a095caa7 DV |
1853 | static int stall_checks(struct drm_crtc *crtc, bool nonblock) |
1854 | { | |
1855 | struct drm_crtc_commit *commit, *stall_commit = NULL; | |
1856 | bool completed = true; | |
1857 | int i; | |
1858 | long ret = 0; | |
1859 | ||
1860 | spin_lock(&crtc->commit_lock); | |
1861 | i = 0; | |
1862 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) { | |
1863 | if (i == 0) { | |
1864 | completed = try_wait_for_completion(&commit->flip_done); | |
1865 | /* Userspace is not allowed to get ahead of the previous | |
1866 | * commit with nonblocking ones. */ | |
1867 | if (!completed && nonblock) { | |
1868 | spin_unlock(&crtc->commit_lock); | |
1869 | return -EBUSY; | |
1870 | } | |
1871 | } else if (i == 1) { | |
f46640b9 | 1872 | stall_commit = drm_crtc_commit_get(commit); |
a095caa7 | 1873 | break; |
723c3e55 | 1874 | } |
a095caa7 DV |
1875 | |
1876 | i++; | |
1877 | } | |
1878 | spin_unlock(&crtc->commit_lock); | |
1879 | ||
1880 | if (!stall_commit) | |
1881 | return 0; | |
1882 | ||
1883 | /* We don't want to let commits get ahead of cleanup work too much, | |
1884 | * stalling on 2nd previous commit means triple-buffer won't ever stall. | |
1885 | */ | |
723c3e55 | 1886 | ret = wait_for_completion_interruptible_timeout(&stall_commit->cleanup_done, |
a095caa7 DV |
1887 | 10*HZ); |
1888 | if (ret == 0) | |
1889 | DRM_ERROR("[CRTC:%d:%s] cleanup_done timed out\n", | |
1890 | crtc->base.id, crtc->name); | |
1891 | ||
1892 | drm_crtc_commit_put(stall_commit); | |
1893 | ||
1894 | return ret < 0 ? ret : 0; | |
1895 | } | |
1896 | ||
899cc5f1 | 1897 | static void release_crtc_commit(struct completion *completion) |
24835e44 DV |
1898 | { |
1899 | struct drm_crtc_commit *commit = container_of(completion, | |
1900 | typeof(*commit), | |
1901 | flip_done); | |
1902 | ||
1903 | drm_crtc_commit_put(commit); | |
1904 | } | |
1905 | ||
21a01abb ML |
1906 | static void init_commit(struct drm_crtc_commit *commit, struct drm_crtc *crtc) |
1907 | { | |
1908 | init_completion(&commit->flip_done); | |
1909 | init_completion(&commit->hw_done); | |
1910 | init_completion(&commit->cleanup_done); | |
1911 | INIT_LIST_HEAD(&commit->commit_entry); | |
1912 | kref_init(&commit->ref); | |
1913 | commit->crtc = crtc; | |
1914 | } | |
1915 | ||
1916 | static struct drm_crtc_commit * | |
1917 | crtc_or_fake_commit(struct drm_atomic_state *state, struct drm_crtc *crtc) | |
1918 | { | |
1919 | if (crtc) { | |
1920 | struct drm_crtc_state *new_crtc_state; | |
1921 | ||
1922 | new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc); | |
1923 | ||
1924 | return new_crtc_state->commit; | |
1925 | } | |
1926 | ||
1927 | if (!state->fake_commit) { | |
1928 | state->fake_commit = kzalloc(sizeof(*state->fake_commit), GFP_KERNEL); | |
1929 | if (!state->fake_commit) | |
1930 | return NULL; | |
1931 | ||
1932 | init_commit(state->fake_commit, NULL); | |
1933 | } | |
1934 | ||
1935 | return state->fake_commit; | |
1936 | } | |
1937 | ||
a095caa7 DV |
1938 | /** |
1939 | * drm_atomic_helper_setup_commit - setup possibly nonblocking commit | |
1940 | * @state: new modeset state to be committed | |
1941 | * @nonblock: whether nonblocking behavior is requested. | |
1942 | * | |
1943 | * This function prepares @state to be used by the atomic helper's support for | |
1944 | * nonblocking commits. Drivers using the nonblocking commit infrastructure | |
6806cdf9 DV |
1945 | * should always call this function from their |
1946 | * &drm_mode_config_funcs.atomic_commit hook. | |
a095caa7 DV |
1947 | * |
1948 | * To be able to use this support drivers need to use a few more helper | |
1949 | * functions. drm_atomic_helper_wait_for_dependencies() must be called before | |
1950 | * actually committing the hardware state, and for nonblocking commits this call | |
1951 | * must be placed in the async worker. See also drm_atomic_helper_swap_state() | |
1e55a53a | 1952 | * and its stall parameter, for when a driver's commit hooks look at the |
6806cdf9 | 1953 | * &drm_crtc.state, &drm_plane.state or &drm_connector.state pointer directly. |
a095caa7 DV |
1954 | * |
1955 | * Completion of the hardware commit step must be signalled using | |
1956 | * drm_atomic_helper_commit_hw_done(). After this step the driver is not allowed | |
1957 | * to read or change any permanent software or hardware modeset state. The only | |
1958 | * exception is state protected by other means than &drm_modeset_lock locks. | |
1959 | * Only the free standing @state with pointers to the old state structures can | |
1960 | * be inspected, e.g. to clean up old buffers using | |
1961 | * drm_atomic_helper_cleanup_planes(). | |
1962 | * | |
1963 | * At the very end, before cleaning up @state drivers must call | |
1964 | * drm_atomic_helper_commit_cleanup_done(). | |
1965 | * | |
1966 | * This is all implemented by in drm_atomic_helper_commit(), giving drivers a | |
9ac07815 | 1967 | * complete and easy-to-use default implementation of the atomic_commit() hook. |
a095caa7 DV |
1968 | * |
1969 | * The tracking of asynchronously executed and still pending commits is done | |
1970 | * using the core structure &drm_crtc_commit. | |
1971 | * | |
1972 | * By default there's no need to clean up resources allocated by this function | |
1973 | * explicitly: drm_atomic_state_default_clear() will take care of that | |
1974 | * automatically. | |
1975 | * | |
1976 | * Returns: | |
1977 | * | |
1978 | * 0 on success. -EBUSY when userspace schedules nonblocking commits too fast, | |
1979 | * -ENOMEM on allocation failures and -EINTR when a signal is pending. | |
1980 | */ | |
1981 | int drm_atomic_helper_setup_commit(struct drm_atomic_state *state, | |
1982 | bool nonblock) | |
1983 | { | |
1984 | struct drm_crtc *crtc; | |
415c3ac3 | 1985 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
21a01abb ML |
1986 | struct drm_connector *conn; |
1987 | struct drm_connector_state *old_conn_state, *new_conn_state; | |
1988 | struct drm_plane *plane; | |
1989 | struct drm_plane_state *old_plane_state, *new_plane_state; | |
a095caa7 DV |
1990 | struct drm_crtc_commit *commit; |
1991 | int i, ret; | |
1992 | ||
415c3ac3 | 1993 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
a095caa7 DV |
1994 | commit = kzalloc(sizeof(*commit), GFP_KERNEL); |
1995 | if (!commit) | |
1996 | return -ENOMEM; | |
1997 | ||
21a01abb | 1998 | init_commit(commit, crtc); |
a095caa7 | 1999 | |
163bcc2c | 2000 | new_crtc_state->commit = commit; |
a095caa7 DV |
2001 | |
2002 | ret = stall_checks(crtc, nonblock); | |
2003 | if (ret) | |
2004 | return ret; | |
2005 | ||
2006 | /* Drivers only send out events when at least either current or | |
2007 | * new CRTC state is active. Complete right away if everything | |
2008 | * stays off. */ | |
415c3ac3 | 2009 | if (!old_crtc_state->active && !new_crtc_state->active) { |
a095caa7 DV |
2010 | complete_all(&commit->flip_done); |
2011 | continue; | |
2012 | } | |
2013 | ||
2014 | /* Legacy cursor updates are fully unsynced. */ | |
2015 | if (state->legacy_cursor_update) { | |
2016 | complete_all(&commit->flip_done); | |
2017 | continue; | |
2018 | } | |
2019 | ||
415c3ac3 | 2020 | if (!new_crtc_state->event) { |
a095caa7 DV |
2021 | commit->event = kzalloc(sizeof(*commit->event), |
2022 | GFP_KERNEL); | |
2023 | if (!commit->event) | |
2024 | return -ENOMEM; | |
2025 | ||
415c3ac3 | 2026 | new_crtc_state->event = commit->event; |
a095caa7 DV |
2027 | } |
2028 | ||
415c3ac3 ML |
2029 | new_crtc_state->event->base.completion = &commit->flip_done; |
2030 | new_crtc_state->event->base.completion_release = release_crtc_commit; | |
24835e44 | 2031 | drm_crtc_commit_get(commit); |
1c6ceeee LSL |
2032 | |
2033 | commit->abort_completion = true; | |
4364bcb2 LL |
2034 | |
2035 | state->crtcs[i].commit = commit; | |
2036 | drm_crtc_commit_get(commit); | |
a095caa7 DV |
2037 | } |
2038 | ||
21a01abb | 2039 | for_each_oldnew_connector_in_state(state, conn, old_conn_state, new_conn_state, i) { |
21a01abb ML |
2040 | /* Userspace is not allowed to get ahead of the previous |
2041 | * commit with nonblocking ones. */ | |
2042 | if (nonblock && old_conn_state->commit && | |
2043 | !try_wait_for_completion(&old_conn_state->commit->flip_done)) | |
2044 | return -EBUSY; | |
a095caa7 | 2045 | |
1f2d9bdc DV |
2046 | /* Always track connectors explicitly for e.g. link retraining. */ |
2047 | commit = crtc_or_fake_commit(state, new_conn_state->crtc ?: old_conn_state->crtc); | |
21a01abb ML |
2048 | if (!commit) |
2049 | return -ENOMEM; | |
a095caa7 | 2050 | |
21a01abb ML |
2051 | new_conn_state->commit = drm_crtc_commit_get(commit); |
2052 | } | |
2053 | ||
2054 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { | |
21a01abb ML |
2055 | /* Userspace is not allowed to get ahead of the previous |
2056 | * commit with nonblocking ones. */ | |
2057 | if (nonblock && old_plane_state->commit && | |
2058 | !try_wait_for_completion(&old_plane_state->commit->flip_done)) | |
2059 | return -EBUSY; | |
2060 | ||
1f2d9bdc | 2061 | /* Always track planes explicitly for async pageflip support. */ |
4edd6084 | 2062 | commit = crtc_or_fake_commit(state, new_plane_state->crtc ?: old_plane_state->crtc); |
21a01abb ML |
2063 | if (!commit) |
2064 | return -ENOMEM; | |
2065 | ||
2066 | new_plane_state->commit = drm_crtc_commit_get(commit); | |
a095caa7 DV |
2067 | } |
2068 | ||
a095caa7 | 2069 | return 0; |
a095caa7 | 2070 | } |
a095caa7 | 2071 | EXPORT_SYMBOL(drm_atomic_helper_setup_commit); |
a095caa7 DV |
2072 | |
2073 | /** | |
2074 | * drm_atomic_helper_wait_for_dependencies - wait for required preceeding commits | |
1ea0c02e | 2075 | * @old_state: atomic state object with old state structures |
a095caa7 DV |
2076 | * |
2077 | * This function waits for all preceeding commits that touch the same CRTC as | |
1ea0c02e | 2078 | * @old_state to both be committed to the hardware (as signalled by |
a095caa7 | 2079 | * drm_atomic_helper_commit_hw_done) and executed by the hardware (as signalled |
277b09cf | 2080 | * by calling drm_crtc_send_vblank_event() on the &drm_crtc_state.event). |
a095caa7 DV |
2081 | * |
2082 | * This is part of the atomic helper support for nonblocking commits, see | |
2083 | * drm_atomic_helper_setup_commit() for an overview. | |
2084 | */ | |
1ea0c02e | 2085 | void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *old_state) |
a095caa7 DV |
2086 | { |
2087 | struct drm_crtc *crtc; | |
163bcc2c | 2088 | struct drm_crtc_state *old_crtc_state; |
21a01abb ML |
2089 | struct drm_plane *plane; |
2090 | struct drm_plane_state *old_plane_state; | |
2091 | struct drm_connector *conn; | |
2092 | struct drm_connector_state *old_conn_state; | |
a095caa7 DV |
2093 | struct drm_crtc_commit *commit; |
2094 | int i; | |
2095 | long ret; | |
2096 | ||
163bcc2c ML |
2097 | for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
2098 | commit = old_crtc_state->commit; | |
a095caa7 DV |
2099 | |
2100 | if (!commit) | |
2101 | continue; | |
2102 | ||
2103 | ret = wait_for_completion_timeout(&commit->hw_done, | |
2104 | 10*HZ); | |
2105 | if (ret == 0) | |
2106 | DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n", | |
2107 | crtc->base.id, crtc->name); | |
2108 | ||
2109 | /* Currently no support for overwriting flips, hence | |
2110 | * stall for previous one to execute completely. */ | |
2111 | ret = wait_for_completion_timeout(&commit->flip_done, | |
2112 | 10*HZ); | |
2113 | if (ret == 0) | |
2114 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
2115 | crtc->base.id, crtc->name); | |
a095caa7 | 2116 | } |
21a01abb ML |
2117 | |
2118 | for_each_old_connector_in_state(old_state, conn, old_conn_state, i) { | |
2119 | commit = old_conn_state->commit; | |
a095caa7 | 2120 | |
21a01abb ML |
2121 | if (!commit) |
2122 | continue; | |
2123 | ||
2124 | ret = wait_for_completion_timeout(&commit->hw_done, | |
2125 | 10*HZ); | |
2126 | if (ret == 0) | |
2127 | DRM_ERROR("[CONNECTOR:%d:%s] hw_done timed out\n", | |
2128 | conn->base.id, conn->name); | |
2129 | ||
2130 | /* Currently no support for overwriting flips, hence | |
2131 | * stall for previous one to execute completely. */ | |
2132 | ret = wait_for_completion_timeout(&commit->flip_done, | |
2133 | 10*HZ); | |
2134 | if (ret == 0) | |
2135 | DRM_ERROR("[CONNECTOR:%d:%s] flip_done timed out\n", | |
2136 | conn->base.id, conn->name); | |
2137 | } | |
2138 | ||
2139 | for_each_old_plane_in_state(old_state, plane, old_plane_state, i) { | |
2140 | commit = old_plane_state->commit; | |
2141 | ||
2142 | if (!commit) | |
2143 | continue; | |
2144 | ||
2145 | ret = wait_for_completion_timeout(&commit->hw_done, | |
2146 | 10*HZ); | |
2147 | if (ret == 0) | |
2148 | DRM_ERROR("[PLANE:%d:%s] hw_done timed out\n", | |
2149 | plane->base.id, plane->name); | |
2150 | ||
2151 | /* Currently no support for overwriting flips, hence | |
2152 | * stall for previous one to execute completely. */ | |
2153 | ret = wait_for_completion_timeout(&commit->flip_done, | |
2154 | 10*HZ); | |
2155 | if (ret == 0) | |
2156 | DRM_ERROR("[PLANE:%d:%s] flip_done timed out\n", | |
2157 | plane->base.id, plane->name); | |
a095caa7 DV |
2158 | } |
2159 | } | |
2160 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies); | |
2161 | ||
b25c60af BB |
2162 | /** |
2163 | * drm_atomic_helper_fake_vblank - fake VBLANK events if needed | |
2164 | * @old_state: atomic state object with old state structures | |
2165 | * | |
2166 | * This function walks all CRTCs and fake VBLANK events on those with | |
2167 | * &drm_crtc_state.no_vblank set to true and &drm_crtc_state.event != NULL. | |
2168 | * The primary use of this function is writeback connectors working in oneshot | |
2169 | * mode and faking VBLANK events. In this case they only fake the VBLANK event | |
2170 | * when a job is queued, and any change to the pipeline that does not touch the | |
2171 | * connector is leading to timeouts when calling | |
2172 | * drm_atomic_helper_wait_for_vblanks() or | |
2173 | * drm_atomic_helper_wait_for_flip_done(). | |
2174 | * | |
2175 | * This is part of the atomic helper support for nonblocking commits, see | |
2176 | * drm_atomic_helper_setup_commit() for an overview. | |
2177 | */ | |
2178 | void drm_atomic_helper_fake_vblank(struct drm_atomic_state *old_state) | |
2179 | { | |
2180 | struct drm_crtc_state *new_crtc_state; | |
2181 | struct drm_crtc *crtc; | |
2182 | int i; | |
2183 | ||
2184 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { | |
2185 | unsigned long flags; | |
2186 | ||
2187 | if (!new_crtc_state->no_vblank) | |
2188 | continue; | |
2189 | ||
2190 | spin_lock_irqsave(&old_state->dev->event_lock, flags); | |
2191 | if (new_crtc_state->event) { | |
2192 | drm_crtc_send_vblank_event(crtc, | |
2193 | new_crtc_state->event); | |
2194 | new_crtc_state->event = NULL; | |
2195 | } | |
2196 | spin_unlock_irqrestore(&old_state->dev->event_lock, flags); | |
2197 | } | |
2198 | } | |
2199 | EXPORT_SYMBOL(drm_atomic_helper_fake_vblank); | |
2200 | ||
a095caa7 DV |
2201 | /** |
2202 | * drm_atomic_helper_commit_hw_done - setup possible nonblocking commit | |
1ea0c02e | 2203 | * @old_state: atomic state object with old state structures |
a095caa7 DV |
2204 | * |
2205 | * This function is used to signal completion of the hardware commit step. After | |
2206 | * this step the driver is not allowed to read or change any permanent software | |
2207 | * or hardware modeset state. The only exception is state protected by other | |
2208 | * means than &drm_modeset_lock locks. | |
2209 | * | |
2210 | * Drivers should try to postpone any expensive or delayed cleanup work after | |
2211 | * this function is called. | |
2212 | * | |
2213 | * This is part of the atomic helper support for nonblocking commits, see | |
2214 | * drm_atomic_helper_setup_commit() for an overview. | |
2215 | */ | |
1ea0c02e | 2216 | void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *old_state) |
a095caa7 DV |
2217 | { |
2218 | struct drm_crtc *crtc; | |
163bcc2c | 2219 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
a095caa7 DV |
2220 | struct drm_crtc_commit *commit; |
2221 | int i; | |
2222 | ||
163bcc2c ML |
2223 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
2224 | commit = new_crtc_state->commit; | |
a095caa7 DV |
2225 | if (!commit) |
2226 | continue; | |
2227 | ||
163bcc2c ML |
2228 | /* |
2229 | * copy new_crtc_state->commit to old_crtc_state->commit, | |
2230 | * it's unsafe to touch new_crtc_state after hw_done, | |
2231 | * but we still need to do so in cleanup_done(). | |
2232 | */ | |
2233 | if (old_crtc_state->commit) | |
2234 | drm_crtc_commit_put(old_crtc_state->commit); | |
2235 | ||
2236 | old_crtc_state->commit = drm_crtc_commit_get(commit); | |
2237 | ||
a095caa7 | 2238 | /* backend must have consumed any event by now */ |
415c3ac3 | 2239 | WARN_ON(new_crtc_state->event); |
a095caa7 | 2240 | complete_all(&commit->hw_done); |
a095caa7 | 2241 | } |
21a01abb ML |
2242 | |
2243 | if (old_state->fake_commit) { | |
2244 | complete_all(&old_state->fake_commit->hw_done); | |
2245 | complete_all(&old_state->fake_commit->flip_done); | |
2246 | } | |
a095caa7 DV |
2247 | } |
2248 | EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done); | |
2249 | ||
2250 | /** | |
2251 | * drm_atomic_helper_commit_cleanup_done - signal completion of commit | |
1ea0c02e | 2252 | * @old_state: atomic state object with old state structures |
a095caa7 | 2253 | * |
1ea0c02e DV |
2254 | * This signals completion of the atomic update @old_state, including any |
2255 | * cleanup work. If used, it must be called right before calling | |
0853695c | 2256 | * drm_atomic_state_put(). |
a095caa7 DV |
2257 | * |
2258 | * This is part of the atomic helper support for nonblocking commits, see | |
2259 | * drm_atomic_helper_setup_commit() for an overview. | |
2260 | */ | |
1ea0c02e | 2261 | void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *old_state) |
a095caa7 DV |
2262 | { |
2263 | struct drm_crtc *crtc; | |
163bcc2c | 2264 | struct drm_crtc_state *old_crtc_state; |
a095caa7 DV |
2265 | struct drm_crtc_commit *commit; |
2266 | int i; | |
a095caa7 | 2267 | |
163bcc2c ML |
2268 | for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
2269 | commit = old_crtc_state->commit; | |
a095caa7 DV |
2270 | if (WARN_ON(!commit)) |
2271 | continue; | |
2272 | ||
a095caa7 DV |
2273 | complete_all(&commit->cleanup_done); |
2274 | WARN_ON(!try_wait_for_completion(&commit->hw_done)); | |
2275 | ||
7141fd3e | 2276 | spin_lock(&crtc->commit_lock); |
a095caa7 DV |
2277 | list_del(&commit->commit_entry); |
2278 | spin_unlock(&crtc->commit_lock); | |
2279 | } | |
21a01abb | 2280 | |
10a599fa | 2281 | if (old_state->fake_commit) { |
21a01abb | 2282 | complete_all(&old_state->fake_commit->cleanup_done); |
10a599fa VS |
2283 | WARN_ON(!try_wait_for_completion(&old_state->fake_commit->hw_done)); |
2284 | } | |
a095caa7 DV |
2285 | } |
2286 | EXPORT_SYMBOL(drm_atomic_helper_commit_cleanup_done); | |
2287 | ||
c2fcd274 | 2288 | /** |
2e3afd47 | 2289 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 2290 | * @dev: DRM device |
2e3afd47 | 2291 | * @state: atomic state object with new state structures |
c2fcd274 DV |
2292 | * |
2293 | * This function prepares plane state, specifically framebuffers, for the new | |
6806cdf9 DV |
2294 | * configuration, by calling &drm_plane_helper_funcs.prepare_fb. If any failure |
2295 | * is encountered this function will call &drm_plane_helper_funcs.cleanup_fb on | |
2296 | * any already successfully prepared framebuffer. | |
c2fcd274 DV |
2297 | * |
2298 | * Returns: | |
2299 | * 0 on success, negative error code on failure. | |
2300 | */ | |
2301 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
2302 | struct drm_atomic_state *state) | |
2303 | { | |
9d2230dc LP |
2304 | struct drm_connector *connector; |
2305 | struct drm_connector_state *new_conn_state; | |
be9174a4 | 2306 | struct drm_plane *plane; |
415c3ac3 | 2307 | struct drm_plane_state *new_plane_state; |
be9174a4 | 2308 | int ret, i, j; |
c2fcd274 | 2309 | |
9d2230dc LP |
2310 | for_each_new_connector_in_state(state, connector, new_conn_state, i) { |
2311 | if (!new_conn_state->writeback_job) | |
2312 | continue; | |
2313 | ||
2314 | ret = drm_writeback_prepare_job(new_conn_state->writeback_job); | |
2315 | if (ret < 0) | |
2316 | return ret; | |
2317 | } | |
2318 | ||
415c3ac3 | 2319 | for_each_new_plane_in_state(state, plane, new_plane_state, i) { |
b5ceff20 | 2320 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
2321 | |
2322 | funcs = plane->helper_private; | |
2323 | ||
844f9111 | 2324 | if (funcs->prepare_fb) { |
415c3ac3 | 2325 | ret = funcs->prepare_fb(plane, new_plane_state); |
c2fcd274 DV |
2326 | if (ret) |
2327 | goto fail; | |
2328 | } | |
2329 | } | |
2330 | ||
2331 | return 0; | |
2332 | ||
2333 | fail: | |
415c3ac3 | 2334 | for_each_new_plane_in_state(state, plane, new_plane_state, j) { |
b5ceff20 | 2335 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 2336 | |
be9174a4 | 2337 | if (j >= i) |
c2fcd274 DV |
2338 | continue; |
2339 | ||
2340 | funcs = plane->helper_private; | |
2341 | ||
844f9111 | 2342 | if (funcs->cleanup_fb) |
415c3ac3 | 2343 | funcs->cleanup_fb(plane, new_plane_state); |
c2fcd274 DV |
2344 | } |
2345 | ||
2346 | return ret; | |
2347 | } | |
2348 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
2349 | ||
7135ac54 | 2350 | static bool plane_crtc_active(const struct drm_plane_state *state) |
aef9dbb8 DV |
2351 | { |
2352 | return state->crtc && state->crtc->state->active; | |
2353 | } | |
2354 | ||
c2fcd274 DV |
2355 | /** |
2356 | * drm_atomic_helper_commit_planes - commit plane state | |
2357 | * @dev: DRM device | |
b0fcfc89 | 2358 | * @old_state: atomic state object with old state structures |
2b58e98d | 2359 | * @flags: flags for committing plane state |
c2fcd274 DV |
2360 | * |
2361 | * This function commits the new plane state using the plane and atomic helper | |
2362 | * functions for planes and crtcs. It assumes that the atomic state has already | |
2363 | * been pushed into the relevant object state pointers, since this step can no | |
2364 | * longer fail. | |
2365 | * | |
b0fcfc89 | 2366 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 | 2367 | * crtcs need to be updated though. |
de28d021 ML |
2368 | * |
2369 | * Note that this function does all plane updates across all CRTCs in one step. | |
2370 | * If the hardware can't support this approach look at | |
2371 | * drm_atomic_helper_commit_planes_on_crtc() instead. | |
6e48ae32 DV |
2372 | * |
2373 | * Plane parameters can be updated by applications while the associated CRTC is | |
2374 | * disabled. The DRM/KMS core will store the parameters in the plane state, | |
2375 | * which will be available to the driver when the CRTC is turned on. As a result | |
2376 | * most drivers don't need to be immediately notified of plane updates for a | |
2377 | * disabled CRTC. | |
2378 | * | |
2b58e98d LY |
2379 | * Unless otherwise needed, drivers are advised to set the ACTIVE_ONLY flag in |
2380 | * @flags in order not to receive plane update notifications related to a | |
2381 | * disabled CRTC. This avoids the need to manually ignore plane updates in | |
6e48ae32 DV |
2382 | * driver code when the driver and/or hardware can't or just don't need to deal |
2383 | * with updates on disabled CRTCs, for example when supporting runtime PM. | |
2384 | * | |
2b58e98d LY |
2385 | * Drivers may set the NO_DISABLE_AFTER_MODESET flag in @flags if the relevant |
2386 | * display controllers require to disable a CRTC's planes when the CRTC is | |
6806cdf9 DV |
2387 | * disabled. This function would skip the &drm_plane_helper_funcs.atomic_disable |
2388 | * call for a plane if the CRTC of the old plane state needs a modesetting | |
2389 | * operation. Of course, the drivers need to disable the planes in their CRTC | |
2390 | * disable callbacks since no one else would do that. | |
2b58e98d LY |
2391 | * |
2392 | * The drm_atomic_helper_commit() default implementation doesn't set the | |
2393 | * ACTIVE_ONLY flag to most closely match the behaviour of the legacy helpers. | |
2394 | * This should not be copied blindly by drivers. | |
c2fcd274 DV |
2395 | */ |
2396 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
aef9dbb8 | 2397 | struct drm_atomic_state *old_state, |
2b58e98d | 2398 | uint32_t flags) |
c2fcd274 | 2399 | { |
df63b999 | 2400 | struct drm_crtc *crtc; |
415c3ac3 | 2401 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
df63b999 | 2402 | struct drm_plane *plane; |
415c3ac3 | 2403 | struct drm_plane_state *old_plane_state, *new_plane_state; |
c2fcd274 | 2404 | int i; |
2b58e98d LY |
2405 | bool active_only = flags & DRM_PLANE_COMMIT_ACTIVE_ONLY; |
2406 | bool no_disable = flags & DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET; | |
c2fcd274 | 2407 | |
415c3ac3 | 2408 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
b5ceff20 | 2409 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
2410 | |
2411 | funcs = crtc->helper_private; | |
2412 | ||
2413 | if (!funcs || !funcs->atomic_begin) | |
2414 | continue; | |
2415 | ||
415c3ac3 | 2416 | if (active_only && !new_crtc_state->active) |
aef9dbb8 DV |
2417 | continue; |
2418 | ||
613d2b27 | 2419 | funcs->atomic_begin(crtc, old_crtc_state); |
c2fcd274 DV |
2420 | } |
2421 | ||
415c3ac3 | 2422 | for_each_oldnew_plane_in_state(old_state, plane, old_plane_state, new_plane_state, i) { |
b5ceff20 | 2423 | const struct drm_plane_helper_funcs *funcs; |
216c59d6 | 2424 | bool disabling; |
c2fcd274 DV |
2425 | |
2426 | funcs = plane->helper_private; | |
2427 | ||
3cad4b68 | 2428 | if (!funcs) |
c2fcd274 DV |
2429 | continue; |
2430 | ||
51ffa12d ML |
2431 | disabling = drm_atomic_plane_disabling(old_plane_state, |
2432 | new_plane_state); | |
216c59d6 LP |
2433 | |
2434 | if (active_only) { | |
2435 | /* | |
2436 | * Skip planes related to inactive CRTCs. If the plane | |
2437 | * is enabled use the state of the current CRTC. If the | |
2438 | * plane is being disabled use the state of the old | |
2439 | * CRTC to avoid skipping planes being disabled on an | |
2440 | * active CRTC. | |
2441 | */ | |
415c3ac3 | 2442 | if (!disabling && !plane_crtc_active(new_plane_state)) |
216c59d6 LP |
2443 | continue; |
2444 | if (disabling && !plane_crtc_active(old_plane_state)) | |
2445 | continue; | |
2446 | } | |
aef9dbb8 | 2447 | |
407b8bd9 TR |
2448 | /* |
2449 | * Special-case disabling the plane if drivers support it. | |
2450 | */ | |
2b58e98d LY |
2451 | if (disabling && funcs->atomic_disable) { |
2452 | struct drm_crtc_state *crtc_state; | |
2453 | ||
2454 | crtc_state = old_plane_state->crtc->state; | |
2455 | ||
2456 | if (drm_atomic_crtc_needs_modeset(crtc_state) && | |
2457 | no_disable) | |
2458 | continue; | |
2459 | ||
407b8bd9 | 2460 | funcs->atomic_disable(plane, old_plane_state); |
415c3ac3 | 2461 | } else if (new_plane_state->crtc || disabling) { |
407b8bd9 | 2462 | funcs->atomic_update(plane, old_plane_state); |
2b58e98d | 2463 | } |
c2fcd274 DV |
2464 | } |
2465 | ||
415c3ac3 | 2466 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
b5ceff20 | 2467 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
2468 | |
2469 | funcs = crtc->helper_private; | |
2470 | ||
2471 | if (!funcs || !funcs->atomic_flush) | |
2472 | continue; | |
2473 | ||
415c3ac3 | 2474 | if (active_only && !new_crtc_state->active) |
aef9dbb8 DV |
2475 | continue; |
2476 | ||
613d2b27 | 2477 | funcs->atomic_flush(crtc, old_crtc_state); |
c2fcd274 DV |
2478 | } |
2479 | } | |
2480 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
2481 | ||
de28d021 ML |
2482 | /** |
2483 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a crtc | |
2484 | * @old_crtc_state: atomic state object with the old crtc state | |
2485 | * | |
2486 | * This function commits the new plane state using the plane and atomic helper | |
2487 | * functions for planes on the specific crtc. It assumes that the atomic state | |
2488 | * has already been pushed into the relevant object state pointers, since this | |
2489 | * step can no longer fail. | |
2490 | * | |
2491 | * This function is useful when plane updates should be done crtc-by-crtc | |
2492 | * instead of one global step like drm_atomic_helper_commit_planes() does. | |
2493 | * | |
2494 | * This function can only be savely used when planes are not allowed to move | |
2495 | * between different CRTCs because this function doesn't handle inter-CRTC | |
2496 | * depencies. Callers need to ensure that either no such depencies exist, | |
2497 | * resolve them through ordering of commit calls or through some other means. | |
2498 | */ | |
2499 | void | |
2500 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) | |
2501 | { | |
2502 | const struct drm_crtc_helper_funcs *crtc_funcs; | |
2503 | struct drm_crtc *crtc = old_crtc_state->crtc; | |
2504 | struct drm_atomic_state *old_state = old_crtc_state->state; | |
e35a2f9a VS |
2505 | struct drm_crtc_state *new_crtc_state = |
2506 | drm_atomic_get_new_crtc_state(old_state, crtc); | |
de28d021 ML |
2507 | struct drm_plane *plane; |
2508 | unsigned plane_mask; | |
2509 | ||
2510 | plane_mask = old_crtc_state->plane_mask; | |
e35a2f9a | 2511 | plane_mask |= new_crtc_state->plane_mask; |
de28d021 ML |
2512 | |
2513 | crtc_funcs = crtc->helper_private; | |
2514 | if (crtc_funcs && crtc_funcs->atomic_begin) | |
613d2b27 | 2515 | crtc_funcs->atomic_begin(crtc, old_crtc_state); |
de28d021 ML |
2516 | |
2517 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { | |
2518 | struct drm_plane_state *old_plane_state = | |
b4d93679 | 2519 | drm_atomic_get_old_plane_state(old_state, plane); |
e35a2f9a VS |
2520 | struct drm_plane_state *new_plane_state = |
2521 | drm_atomic_get_new_plane_state(old_state, plane); | |
de28d021 ML |
2522 | const struct drm_plane_helper_funcs *plane_funcs; |
2523 | ||
2524 | plane_funcs = plane->helper_private; | |
2525 | ||
2526 | if (!old_plane_state || !plane_funcs) | |
2527 | continue; | |
2528 | ||
e35a2f9a VS |
2529 | WARN_ON(new_plane_state->crtc && |
2530 | new_plane_state->crtc != crtc); | |
de28d021 | 2531 | |
e35a2f9a | 2532 | if (drm_atomic_plane_disabling(old_plane_state, new_plane_state) && |
de28d021 ML |
2533 | plane_funcs->atomic_disable) |
2534 | plane_funcs->atomic_disable(plane, old_plane_state); | |
e35a2f9a VS |
2535 | else if (new_plane_state->crtc || |
2536 | drm_atomic_plane_disabling(old_plane_state, new_plane_state)) | |
de28d021 ML |
2537 | plane_funcs->atomic_update(plane, old_plane_state); |
2538 | } | |
2539 | ||
2540 | if (crtc_funcs && crtc_funcs->atomic_flush) | |
613d2b27 | 2541 | crtc_funcs->atomic_flush(crtc, old_crtc_state); |
de28d021 ML |
2542 | } |
2543 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); | |
2544 | ||
6753ba97 JS |
2545 | /** |
2546 | * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes | |
28500291 | 2547 | * @old_crtc_state: atomic state object with the old CRTC state |
6753ba97 JS |
2548 | * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks |
2549 | * | |
2550 | * Disables all planes associated with the given CRTC. This can be | |
28500291 LY |
2551 | * used for instance in the CRTC helper atomic_disable callback to disable |
2552 | * all planes. | |
6753ba97 JS |
2553 | * |
2554 | * If the atomic-parameter is set the function calls the CRTC's | |
2555 | * atomic_begin hook before and atomic_flush hook after disabling the | |
2556 | * planes. | |
2557 | * | |
2558 | * It is a bug to call this function without having implemented the | |
6806cdf9 | 2559 | * &drm_plane_helper_funcs.atomic_disable plane hook. |
6753ba97 | 2560 | */ |
28500291 LY |
2561 | void |
2562 | drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state, | |
2563 | bool atomic) | |
6753ba97 | 2564 | { |
28500291 | 2565 | struct drm_crtc *crtc = old_crtc_state->crtc; |
6753ba97 JS |
2566 | const struct drm_crtc_helper_funcs *crtc_funcs = |
2567 | crtc->helper_private; | |
2568 | struct drm_plane *plane; | |
2569 | ||
2570 | if (atomic && crtc_funcs && crtc_funcs->atomic_begin) | |
2571 | crtc_funcs->atomic_begin(crtc, NULL); | |
2572 | ||
28500291 | 2573 | drm_atomic_crtc_state_for_each_plane(plane, old_crtc_state) { |
6753ba97 JS |
2574 | const struct drm_plane_helper_funcs *plane_funcs = |
2575 | plane->helper_private; | |
2576 | ||
28500291 | 2577 | if (!plane_funcs) |
6753ba97 JS |
2578 | continue; |
2579 | ||
2580 | WARN_ON(!plane_funcs->atomic_disable); | |
2581 | if (plane_funcs->atomic_disable) | |
2582 | plane_funcs->atomic_disable(plane, NULL); | |
2583 | } | |
2584 | ||
2585 | if (atomic && crtc_funcs && crtc_funcs->atomic_flush) | |
2586 | crtc_funcs->atomic_flush(crtc, NULL); | |
2587 | } | |
2588 | EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); | |
2589 | ||
c2fcd274 DV |
2590 | /** |
2591 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
2592 | * @dev: DRM device | |
2593 | * @old_state: atomic state object with old state structures | |
2594 | * | |
2595 | * This function cleans up plane state, specifically framebuffers, from the old | |
2596 | * configuration. Hence the old configuration must be perserved in @old_state to | |
2597 | * be able to call this function. | |
2598 | * | |
2599 | * This function must also be called on the new state when the atomic update | |
2600 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
2601 | */ | |
2602 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
2603 | struct drm_atomic_state *old_state) | |
2604 | { | |
df63b999 | 2605 | struct drm_plane *plane; |
415c3ac3 | 2606 | struct drm_plane_state *old_plane_state, *new_plane_state; |
c2fcd274 DV |
2607 | int i; |
2608 | ||
415c3ac3 | 2609 | for_each_oldnew_plane_in_state(old_state, plane, old_plane_state, new_plane_state, i) { |
b5ceff20 | 2610 | const struct drm_plane_helper_funcs *funcs; |
415c3ac3 ML |
2611 | struct drm_plane_state *plane_state; |
2612 | ||
2613 | /* | |
2614 | * This might be called before swapping when commit is aborted, | |
2615 | * in which case we have to cleanup the new state. | |
2616 | */ | |
2617 | if (old_plane_state == plane->state) | |
2618 | plane_state = new_plane_state; | |
2619 | else | |
2620 | plane_state = old_plane_state; | |
c2fcd274 | 2621 | |
c2fcd274 DV |
2622 | funcs = plane->helper_private; |
2623 | ||
844f9111 ML |
2624 | if (funcs->cleanup_fb) |
2625 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
2626 | } |
2627 | } | |
2628 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
2629 | ||
2630 | /** | |
2631 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
c2fcd274 | 2632 | * @state: atomic state |
c066d231 | 2633 | * @stall: stall for preceeding commits |
c2fcd274 DV |
2634 | * |
2635 | * This function stores the atomic state into the current state pointers in all | |
2636 | * driver objects. It should be called after all failing steps have been done | |
2637 | * and succeeded, but before the actual hardware state is committed. | |
2638 | * | |
2639 | * For cleanup and error recovery the current state for all changed objects will | |
c066d231 | 2640 | * be swapped into @state. |
c2fcd274 DV |
2641 | * |
2642 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
2643 | * | |
2644 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
2645 | * | |
2646 | * 2. Do any other steps that might fail. | |
2647 | * | |
2648 | * 3. Put the staged state into the current state pointers with this function. | |
2649 | * | |
2650 | * 4. Actually commit the hardware state. | |
2651 | * | |
26196f7e | 2652 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
c2fcd274 | 2653 | * contains the old state. Also do any other cleanup required with that state. |
a095caa7 DV |
2654 | * |
2655 | * @stall must be set when nonblocking commits for this driver directly access | |
6806cdf9 DV |
2656 | * the &drm_plane.state, &drm_crtc.state or &drm_connector.state pointer. With |
2657 | * the current atomic helpers this is almost always the case, since the helpers | |
a095caa7 | 2658 | * don't pass the right state structures to the callbacks. |
c066d231 ML |
2659 | * |
2660 | * Returns: | |
2661 | * | |
c4bbb735 ML |
2662 | * Returns 0 on success. Can return -ERESTARTSYS when @stall is true and the |
2663 | * waiting for the previous commits has been interrupted. | |
c2fcd274 | 2664 | */ |
c066d231 | 2665 | int drm_atomic_helper_swap_state(struct drm_atomic_state *state, |
5e84c269 | 2666 | bool stall) |
c2fcd274 | 2667 | { |
c4bbb735 | 2668 | int i, ret; |
be9174a4 | 2669 | struct drm_connector *connector; |
415c3ac3 | 2670 | struct drm_connector_state *old_conn_state, *new_conn_state; |
be9174a4 | 2671 | struct drm_crtc *crtc; |
415c3ac3 | 2672 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
be9174a4 | 2673 | struct drm_plane *plane; |
415c3ac3 | 2674 | struct drm_plane_state *old_plane_state, *new_plane_state; |
a095caa7 | 2675 | struct drm_crtc_commit *commit; |
a4370c77 VS |
2676 | struct drm_private_obj *obj; |
2677 | struct drm_private_state *old_obj_state, *new_obj_state; | |
a095caa7 DV |
2678 | |
2679 | if (stall) { | |
21a01abb ML |
2680 | /* |
2681 | * We have to stall for hw_done here before | |
2682 | * drm_atomic_helper_wait_for_dependencies() because flip | |
2683 | * depth > 1 is not yet supported by all drivers. As long as | |
2684 | * obj->state is directly dereferenced anywhere in the drivers | |
2685 | * atomic_commit_tail function, then it's unsafe to swap state | |
2686 | * before drm_atomic_helper_commit_hw_done() is called. | |
2687 | */ | |
2688 | ||
163bcc2c ML |
2689 | for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) { |
2690 | commit = old_crtc_state->commit; | |
a095caa7 DV |
2691 | |
2692 | if (!commit) | |
2693 | continue; | |
2694 | ||
c4bbb735 | 2695 | ret = wait_for_completion_interruptible(&commit->hw_done); |
c4bbb735 ML |
2696 | if (ret) |
2697 | return ret; | |
a095caa7 | 2698 | } |
21a01abb ML |
2699 | |
2700 | for_each_old_connector_in_state(state, connector, old_conn_state, i) { | |
2701 | commit = old_conn_state->commit; | |
a095caa7 DV |
2702 | |
2703 | if (!commit) | |
2704 | continue; | |
2705 | ||
c4bbb735 | 2706 | ret = wait_for_completion_interruptible(&commit->hw_done); |
21a01abb ML |
2707 | if (ret) |
2708 | return ret; | |
2709 | } | |
c4bbb735 | 2710 | |
21a01abb ML |
2711 | for_each_old_plane_in_state(state, plane, old_plane_state, i) { |
2712 | commit = old_plane_state->commit; | |
2713 | ||
2714 | if (!commit) | |
2715 | continue; | |
2716 | ||
2717 | ret = wait_for_completion_interruptible(&commit->hw_done); | |
c4bbb735 ML |
2718 | if (ret) |
2719 | return ret; | |
a095caa7 DV |
2720 | } |
2721 | } | |
c2fcd274 | 2722 | |
415c3ac3 | 2723 | for_each_oldnew_connector_in_state(state, connector, old_conn_state, new_conn_state, i) { |
581e49fe ML |
2724 | WARN_ON(connector->state != old_conn_state); |
2725 | ||
415c3ac3 ML |
2726 | old_conn_state->state = state; |
2727 | new_conn_state->state = NULL; | |
2728 | ||
2729 | state->connectors[i].state = old_conn_state; | |
2730 | connector->state = new_conn_state; | |
c2fcd274 DV |
2731 | } |
2732 | ||
415c3ac3 | 2733 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
581e49fe ML |
2734 | WARN_ON(crtc->state != old_crtc_state); |
2735 | ||
415c3ac3 ML |
2736 | old_crtc_state->state = state; |
2737 | new_crtc_state->state = NULL; | |
2738 | ||
2739 | state->crtcs[i].state = old_crtc_state; | |
2740 | crtc->state = new_crtc_state; | |
a095caa7 | 2741 | |
163bcc2c | 2742 | if (new_crtc_state->commit) { |
a095caa7 | 2743 | spin_lock(&crtc->commit_lock); |
163bcc2c | 2744 | list_add(&new_crtc_state->commit->commit_entry, |
a095caa7 DV |
2745 | &crtc->commit_list); |
2746 | spin_unlock(&crtc->commit_lock); | |
2747 | ||
163bcc2c | 2748 | new_crtc_state->commit->event = NULL; |
a095caa7 | 2749 | } |
c2fcd274 DV |
2750 | } |
2751 | ||
415c3ac3 | 2752 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { |
581e49fe ML |
2753 | WARN_ON(plane->state != old_plane_state); |
2754 | ||
415c3ac3 ML |
2755 | old_plane_state->state = state; |
2756 | new_plane_state->state = NULL; | |
2757 | ||
2758 | state->planes[i].state = old_plane_state; | |
2759 | plane->state = new_plane_state; | |
c2fcd274 | 2760 | } |
b430c27a | 2761 | |
a4370c77 VS |
2762 | for_each_oldnew_private_obj_in_state(state, obj, old_obj_state, new_obj_state, i) { |
2763 | WARN_ON(obj->state != old_obj_state); | |
2764 | ||
2765 | old_obj_state->state = state; | |
2766 | new_obj_state->state = NULL; | |
2767 | ||
2768 | state->private_objs[i].state = old_obj_state; | |
2769 | obj->state = new_obj_state; | |
2770 | } | |
c066d231 ML |
2771 | |
2772 | return 0; | |
c2fcd274 DV |
2773 | } |
2774 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
2775 | |
2776 | /** | |
2777 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
2778 | * @plane: plane object to update | |
2779 | * @crtc: owning CRTC of owning plane | |
2780 | * @fb: framebuffer to flip onto plane | |
2781 | * @crtc_x: x offset of primary plane on crtc | |
2782 | * @crtc_y: y offset of primary plane on crtc | |
2783 | * @crtc_w: width of primary plane rectangle on crtc | |
2784 | * @crtc_h: height of primary plane rectangle on crtc | |
2785 | * @src_x: x offset of @fb for panning | |
2786 | * @src_y: y offset of @fb for panning | |
2787 | * @src_w: width of source rectangle in @fb | |
2788 | * @src_h: height of source rectangle in @fb | |
34a2ab5e | 2789 | * @ctx: lock acquire context |
042652ed DV |
2790 | * |
2791 | * Provides a default plane update handler using the atomic driver interface. | |
2792 | * | |
2793 | * RETURNS: | |
2794 | * Zero on success, error code on failure | |
2795 | */ | |
2796 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
2797 | struct drm_crtc *crtc, | |
2798 | struct drm_framebuffer *fb, | |
2799 | int crtc_x, int crtc_y, | |
2800 | unsigned int crtc_w, unsigned int crtc_h, | |
2801 | uint32_t src_x, uint32_t src_y, | |
34a2ab5e DV |
2802 | uint32_t src_w, uint32_t src_h, |
2803 | struct drm_modeset_acquire_ctx *ctx) | |
042652ed DV |
2804 | { |
2805 | struct drm_atomic_state *state; | |
2806 | struct drm_plane_state *plane_state; | |
2807 | int ret = 0; | |
2808 | ||
2809 | state = drm_atomic_state_alloc(plane->dev); | |
2810 | if (!state) | |
2811 | return -ENOMEM; | |
2812 | ||
d26f96c7 | 2813 | state->acquire_ctx = ctx; |
042652ed DV |
2814 | plane_state = drm_atomic_get_plane_state(state, plane); |
2815 | if (IS_ERR(plane_state)) { | |
2816 | ret = PTR_ERR(plane_state); | |
2817 | goto fail; | |
2818 | } | |
2819 | ||
07cc0ef6 | 2820 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
2821 | if (ret != 0) |
2822 | goto fail; | |
321ebf04 | 2823 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
2824 | plane_state->crtc_x = crtc_x; |
2825 | plane_state->crtc_y = crtc_y; | |
042652ed | 2826 | plane_state->crtc_w = crtc_w; |
02e6f379 | 2827 | plane_state->crtc_h = crtc_h; |
042652ed DV |
2828 | plane_state->src_x = src_x; |
2829 | plane_state->src_y = src_y; | |
042652ed | 2830 | plane_state->src_w = src_w; |
02e6f379 | 2831 | plane_state->src_h = src_h; |
042652ed | 2832 | |
3671c580 DV |
2833 | if (plane == crtc->cursor) |
2834 | state->legacy_cursor_update = true; | |
2835 | ||
042652ed | 2836 | ret = drm_atomic_commit(state); |
042652ed | 2837 | fail: |
0853695c | 2838 | drm_atomic_state_put(state); |
042652ed | 2839 | return ret; |
042652ed DV |
2840 | } |
2841 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
2842 | ||
2843 | /** | |
2844 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
2845 | * @plane: plane to disable | |
19315294 | 2846 | * @ctx: lock acquire context |
042652ed DV |
2847 | * |
2848 | * Provides a default plane disable handler using the atomic driver interface. | |
2849 | * | |
2850 | * RETURNS: | |
2851 | * Zero on success, error code on failure | |
2852 | */ | |
19315294 DV |
2853 | int drm_atomic_helper_disable_plane(struct drm_plane *plane, |
2854 | struct drm_modeset_acquire_ctx *ctx) | |
042652ed DV |
2855 | { |
2856 | struct drm_atomic_state *state; | |
2857 | struct drm_plane_state *plane_state; | |
2858 | int ret = 0; | |
2859 | ||
2860 | state = drm_atomic_state_alloc(plane->dev); | |
2861 | if (!state) | |
2862 | return -ENOMEM; | |
2863 | ||
d26f96c7 | 2864 | state->acquire_ctx = ctx; |
042652ed DV |
2865 | plane_state = drm_atomic_get_plane_state(state, plane); |
2866 | if (IS_ERR(plane_state)) { | |
2867 | ret = PTR_ERR(plane_state); | |
2868 | goto fail; | |
2869 | } | |
2870 | ||
a36c027d | 2871 | if (plane_state->crtc && plane_state->crtc->cursor == plane) |
24e79d0d ML |
2872 | plane_state->state->legacy_cursor_update = true; |
2873 | ||
bbb1e524 | 2874 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
042652ed DV |
2875 | if (ret != 0) |
2876 | goto fail; | |
f02ad907 | 2877 | |
042652ed | 2878 | ret = drm_atomic_commit(state); |
042652ed | 2879 | fail: |
0853695c | 2880 | drm_atomic_state_put(state); |
042652ed | 2881 | return ret; |
042652ed DV |
2882 | } |
2883 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
2884 | ||
042652ed DV |
2885 | /** |
2886 | * drm_atomic_helper_set_config - set a new config from userspace | |
2887 | * @set: mode set configuration | |
a4eff9aa | 2888 | * @ctx: lock acquisition context |
042652ed DV |
2889 | * |
2890 | * Provides a default crtc set_config handler using the atomic driver interface. | |
2891 | * | |
40ee6fbe MN |
2892 | * NOTE: For backwards compatibility with old userspace this automatically |
2893 | * resets the "link-status" property to GOOD, to force any link | |
2894 | * re-training. The SETCRTC ioctl does not define whether an update does | |
2895 | * need a full modeset or just a plane update, hence we're allowed to do | |
97e14fbe | 2896 | * that. See also drm_connector_set_link_status_property(). |
40ee6fbe | 2897 | * |
042652ed DV |
2898 | * Returns: |
2899 | * Returns 0 on success, negative errno numbers on failure. | |
2900 | */ | |
a4eff9aa DV |
2901 | int drm_atomic_helper_set_config(struct drm_mode_set *set, |
2902 | struct drm_modeset_acquire_ctx *ctx) | |
042652ed DV |
2903 | { |
2904 | struct drm_atomic_state *state; | |
2905 | struct drm_crtc *crtc = set->crtc; | |
042652ed DV |
2906 | int ret = 0; |
2907 | ||
2908 | state = drm_atomic_state_alloc(crtc->dev); | |
2909 | if (!state) | |
2910 | return -ENOMEM; | |
2911 | ||
38b6441e | 2912 | state->acquire_ctx = ctx; |
bbb1e524 RC |
2913 | ret = __drm_atomic_helper_set_config(set, state); |
2914 | if (ret != 0) | |
1fa4da04 | 2915 | goto fail; |
042652ed | 2916 | |
44596b8c ML |
2917 | ret = handle_conflicting_encoders(state, true); |
2918 | if (ret) | |
2919 | return ret; | |
2920 | ||
bbb1e524 | 2921 | ret = drm_atomic_commit(state); |
bbb1e524 | 2922 | |
1fa4da04 | 2923 | fail: |
0853695c | 2924 | drm_atomic_state_put(state); |
bbb1e524 | 2925 | return ret; |
bbb1e524 RC |
2926 | } |
2927 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
2928 | ||
37406a60 SP |
2929 | /** |
2930 | * drm_atomic_helper_disable_all - disable all currently active outputs | |
2931 | * @dev: DRM device | |
2932 | * @ctx: lock acquisition context | |
2933 | * | |
2934 | * Loops through all connectors, finding those that aren't turned off and then | |
2935 | * turns them off by setting their DPMS mode to OFF and deactivating the CRTC | |
2936 | * that they are connected to. | |
2937 | * | |
2938 | * This is used for example in suspend/resume to disable all currently active | |
2939 | * functions when suspending. If you just want to shut down everything at e.g. | |
2940 | * driver unload, look at drm_atomic_helper_shutdown(). | |
2941 | * | |
2942 | * Note that if callers haven't already acquired all modeset locks this might | |
2943 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
2944 | * | |
2945 | * Returns: | |
2946 | * 0 on success or a negative error code on failure. | |
2947 | * | |
2948 | * See also: | |
2949 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() and | |
2950 | * drm_atomic_helper_shutdown(). | |
2951 | */ | |
2952 | int drm_atomic_helper_disable_all(struct drm_device *dev, | |
2953 | struct drm_modeset_acquire_ctx *ctx) | |
14942760 TR |
2954 | { |
2955 | struct drm_atomic_state *state; | |
9b2104f4 | 2956 | struct drm_connector_state *conn_state; |
14942760 | 2957 | struct drm_connector *conn; |
9b2104f4 ML |
2958 | struct drm_plane_state *plane_state; |
2959 | struct drm_plane *plane; | |
2960 | struct drm_crtc_state *crtc_state; | |
2961 | struct drm_crtc *crtc; | |
2962 | int ret, i; | |
14942760 TR |
2963 | |
2964 | state = drm_atomic_state_alloc(dev); | |
2965 | if (!state) | |
2966 | return -ENOMEM; | |
2967 | ||
2968 | state->acquire_ctx = ctx; | |
2969 | ||
9b2104f4 | 2970 | drm_for_each_crtc(crtc, dev) { |
14942760 TR |
2971 | crtc_state = drm_atomic_get_crtc_state(state, crtc); |
2972 | if (IS_ERR(crtc_state)) { | |
9b2104f4 | 2973 | ret = PTR_ERR(crtc_state); |
14942760 TR |
2974 | goto free; |
2975 | } | |
2976 | ||
2977 | crtc_state->active = false; | |
9b2104f4 ML |
2978 | |
2979 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, NULL); | |
2980 | if (ret < 0) | |
2981 | goto free; | |
2982 | ||
2983 | ret = drm_atomic_add_affected_planes(state, crtc); | |
2984 | if (ret < 0) | |
2985 | goto free; | |
2986 | ||
2987 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
2988 | if (ret < 0) | |
2989 | goto free; | |
2990 | } | |
2991 | ||
dfb8bb3b | 2992 | for_each_new_connector_in_state(state, conn, conn_state, i) { |
9b2104f4 ML |
2993 | ret = drm_atomic_set_crtc_for_connector(conn_state, NULL); |
2994 | if (ret < 0) | |
2995 | goto free; | |
2996 | } | |
2997 | ||
dfb8bb3b | 2998 | for_each_new_plane_in_state(state, plane, plane_state, i) { |
9b2104f4 ML |
2999 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); |
3000 | if (ret < 0) | |
3001 | goto free; | |
3002 | ||
3003 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
14942760 TR |
3004 | } |
3005 | ||
9b2104f4 | 3006 | ret = drm_atomic_commit(state); |
14942760 | 3007 | free: |
0853695c | 3008 | drm_atomic_state_put(state); |
9b2104f4 | 3009 | return ret; |
14942760 TR |
3010 | } |
3011 | EXPORT_SYMBOL(drm_atomic_helper_disable_all); | |
3012 | ||
18dddadc DV |
3013 | /** |
3014 | * drm_atomic_helper_shutdown - shutdown all CRTC | |
3015 | * @dev: DRM device | |
3016 | * | |
3017 | * This shuts down all CRTC, which is useful for driver unloading. Shutdown on | |
3018 | * suspend should instead be handled with drm_atomic_helper_suspend(), since | |
3019 | * that also takes a snapshot of the modeset state to be restored on resume. | |
3020 | * | |
3021 | * This is just a convenience wrapper around drm_atomic_helper_disable_all(), | |
3022 | * and it is the atomic version of drm_crtc_force_disable_all(). | |
3023 | */ | |
3024 | void drm_atomic_helper_shutdown(struct drm_device *dev) | |
3025 | { | |
3026 | struct drm_modeset_acquire_ctx ctx; | |
3027 | int ret; | |
3028 | ||
b7ea04d2 | 3029 | DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret); |
18dddadc | 3030 | |
37406a60 | 3031 | ret = drm_atomic_helper_disable_all(dev, &ctx); |
18dddadc DV |
3032 | if (ret) |
3033 | DRM_ERROR("Disabling all crtc's during unload failed with %i\n", ret); | |
3034 | ||
b7ea04d2 | 3035 | DRM_MODESET_LOCK_ALL_END(ctx, ret); |
18dddadc DV |
3036 | } |
3037 | EXPORT_SYMBOL(drm_atomic_helper_shutdown); | |
3038 | ||
1d8224e7 DV |
3039 | /** |
3040 | * drm_atomic_helper_duplicate_state - duplicate an atomic state object | |
3041 | * @dev: DRM device | |
3042 | * @ctx: lock acquisition context | |
3043 | * | |
3044 | * Makes a copy of the current atomic state by looping over all objects and | |
3045 | * duplicating their respective states. This is used for example by suspend/ | |
3046 | * resume support code to save the state prior to suspend such that it can | |
3047 | * be restored upon resume. | |
3048 | * | |
3049 | * Note that this treats atomic state as persistent between save and restore. | |
3050 | * Drivers must make sure that this is possible and won't result in confusion | |
3051 | * or erroneous behaviour. | |
3052 | * | |
3053 | * Note that if callers haven't already acquired all modeset locks this might | |
3054 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
3055 | * | |
3056 | * Returns: | |
3057 | * A pointer to the copy of the atomic state object on success or an | |
3058 | * ERR_PTR()-encoded error code on failure. | |
3059 | * | |
3060 | * See also: | |
3061 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
3062 | */ | |
3063 | struct drm_atomic_state * | |
3064 | drm_atomic_helper_duplicate_state(struct drm_device *dev, | |
3065 | struct drm_modeset_acquire_ctx *ctx) | |
3066 | { | |
3067 | struct drm_atomic_state *state; | |
3068 | struct drm_connector *conn; | |
3069 | struct drm_connector_list_iter conn_iter; | |
3070 | struct drm_plane *plane; | |
3071 | struct drm_crtc *crtc; | |
3072 | int err = 0; | |
3073 | ||
3074 | state = drm_atomic_state_alloc(dev); | |
3075 | if (!state) | |
3076 | return ERR_PTR(-ENOMEM); | |
3077 | ||
3078 | state->acquire_ctx = ctx; | |
022debad | 3079 | state->duplicated = true; |
1d8224e7 DV |
3080 | |
3081 | drm_for_each_crtc(crtc, dev) { | |
3082 | struct drm_crtc_state *crtc_state; | |
3083 | ||
3084 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3085 | if (IS_ERR(crtc_state)) { | |
3086 | err = PTR_ERR(crtc_state); | |
3087 | goto free; | |
3088 | } | |
3089 | } | |
3090 | ||
3091 | drm_for_each_plane(plane, dev) { | |
3092 | struct drm_plane_state *plane_state; | |
3093 | ||
3094 | plane_state = drm_atomic_get_plane_state(state, plane); | |
3095 | if (IS_ERR(plane_state)) { | |
3096 | err = PTR_ERR(plane_state); | |
3097 | goto free; | |
3098 | } | |
3099 | } | |
3100 | ||
3101 | drm_connector_list_iter_begin(dev, &conn_iter); | |
3102 | drm_for_each_connector_iter(conn, &conn_iter) { | |
3103 | struct drm_connector_state *conn_state; | |
3104 | ||
3105 | conn_state = drm_atomic_get_connector_state(state, conn); | |
3106 | if (IS_ERR(conn_state)) { | |
3107 | err = PTR_ERR(conn_state); | |
3108 | drm_connector_list_iter_end(&conn_iter); | |
3109 | goto free; | |
3110 | } | |
3111 | } | |
3112 | drm_connector_list_iter_end(&conn_iter); | |
3113 | ||
3114 | /* clear the acquire context so that it isn't accidentally reused */ | |
3115 | state->acquire_ctx = NULL; | |
3116 | ||
3117 | free: | |
3118 | if (err < 0) { | |
3119 | drm_atomic_state_put(state); | |
3120 | state = ERR_PTR(err); | |
3121 | } | |
3122 | ||
3123 | return state; | |
3124 | } | |
3125 | EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); | |
3126 | ||
14942760 TR |
3127 | /** |
3128 | * drm_atomic_helper_suspend - subsystem-level suspend helper | |
3129 | * @dev: DRM device | |
3130 | * | |
3131 | * Duplicates the current atomic state, disables all active outputs and then | |
3132 | * returns a pointer to the original atomic state to the caller. Drivers can | |
3133 | * pass this pointer to the drm_atomic_helper_resume() helper upon resume to | |
3134 | * restore the output configuration that was active at the time the system | |
3135 | * entered suspend. | |
3136 | * | |
3137 | * Note that it is potentially unsafe to use this. The atomic state object | |
3138 | * returned by this function is assumed to be persistent. Drivers must ensure | |
3139 | * that this holds true. Before calling this function, drivers must make sure | |
3140 | * to suspend fbdev emulation so that nothing can be using the device. | |
3141 | * | |
3142 | * Returns: | |
3143 | * A pointer to a copy of the state before suspend on success or an ERR_PTR()- | |
3144 | * encoded error code on failure. Drivers should store the returned atomic | |
3145 | * state object and pass it to the drm_atomic_helper_resume() helper upon | |
3146 | * resume. | |
3147 | * | |
3148 | * See also: | |
3149 | * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), | |
581e49fe | 3150 | * drm_atomic_helper_resume(), drm_atomic_helper_commit_duplicated_state() |
14942760 TR |
3151 | */ |
3152 | struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) | |
3153 | { | |
3154 | struct drm_modeset_acquire_ctx ctx; | |
3155 | struct drm_atomic_state *state; | |
3156 | int err; | |
3157 | ||
615aa3d9 SP |
3158 | /* This can never be returned, but it makes the compiler happy */ |
3159 | state = ERR_PTR(-EINVAL); | |
14942760 | 3160 | |
b7ea04d2 | 3161 | DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err); |
14942760 TR |
3162 | |
3163 | state = drm_atomic_helper_duplicate_state(dev, &ctx); | |
3164 | if (IS_ERR(state)) | |
3165 | goto unlock; | |
3166 | ||
3167 | err = drm_atomic_helper_disable_all(dev, &ctx); | |
3168 | if (err < 0) { | |
0853695c | 3169 | drm_atomic_state_put(state); |
14942760 TR |
3170 | state = ERR_PTR(err); |
3171 | goto unlock; | |
3172 | } | |
3173 | ||
3174 | unlock: | |
b7ea04d2 SP |
3175 | DRM_MODESET_LOCK_ALL_END(ctx, err); |
3176 | if (err) | |
3177 | return ERR_PTR(err); | |
14942760 | 3178 | |
14942760 TR |
3179 | return state; |
3180 | } | |
3181 | EXPORT_SYMBOL(drm_atomic_helper_suspend); | |
3182 | ||
581e49fe ML |
3183 | /** |
3184 | * drm_atomic_helper_commit_duplicated_state - commit duplicated state | |
3185 | * @state: duplicated atomic state to commit | |
3186 | * @ctx: pointer to acquire_ctx to use for commit. | |
3187 | * | |
3188 | * The state returned by drm_atomic_helper_duplicate_state() and | |
3189 | * drm_atomic_helper_suspend() is partially invalid, and needs to | |
3190 | * be fixed up before commit. | |
3191 | * | |
3192 | * Returns: | |
3193 | * 0 on success or a negative error code on failure. | |
3194 | * | |
3195 | * See also: | |
3196 | * drm_atomic_helper_suspend() | |
3197 | */ | |
3198 | int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state, | |
3199 | struct drm_modeset_acquire_ctx *ctx) | |
3200 | { | |
aa394b0d | 3201 | int i, ret; |
581e49fe | 3202 | struct drm_plane *plane; |
415c3ac3 | 3203 | struct drm_plane_state *new_plane_state; |
581e49fe | 3204 | struct drm_connector *connector; |
415c3ac3 | 3205 | struct drm_connector_state *new_conn_state; |
581e49fe | 3206 | struct drm_crtc *crtc; |
415c3ac3 | 3207 | struct drm_crtc_state *new_crtc_state; |
581e49fe ML |
3208 | |
3209 | state->acquire_ctx = ctx; | |
3210 | ||
e00fb856 | 3211 | for_each_new_plane_in_state(state, plane, new_plane_state, i) |
581e49fe ML |
3212 | state->planes[i].old_state = plane->state; |
3213 | ||
415c3ac3 | 3214 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) |
581e49fe ML |
3215 | state->crtcs[i].old_state = crtc->state; |
3216 | ||
415c3ac3 | 3217 | for_each_new_connector_in_state(state, connector, new_conn_state, i) |
581e49fe ML |
3218 | state->connectors[i].old_state = connector->state; |
3219 | ||
aa394b0d SP |
3220 | ret = drm_atomic_commit(state); |
3221 | ||
3222 | state->acquire_ctx = NULL; | |
3223 | ||
3224 | return ret; | |
581e49fe ML |
3225 | } |
3226 | EXPORT_SYMBOL(drm_atomic_helper_commit_duplicated_state); | |
3227 | ||
14942760 TR |
3228 | /** |
3229 | * drm_atomic_helper_resume - subsystem-level resume helper | |
3230 | * @dev: DRM device | |
3231 | * @state: atomic state to resume to | |
3232 | * | |
3233 | * Calls drm_mode_config_reset() to synchronize hardware and software states, | |
3234 | * grabs all modeset locks and commits the atomic state object. This can be | |
3235 | * used in conjunction with the drm_atomic_helper_suspend() helper to | |
3236 | * implement suspend/resume for drivers that support atomic mode-setting. | |
3237 | * | |
3238 | * Returns: | |
3239 | * 0 on success or a negative error code on failure. | |
3240 | * | |
3241 | * See also: | |
3242 | * drm_atomic_helper_suspend() | |
3243 | */ | |
3244 | int drm_atomic_helper_resume(struct drm_device *dev, | |
3245 | struct drm_atomic_state *state) | |
3246 | { | |
a5b8444e | 3247 | struct drm_modeset_acquire_ctx ctx; |
14942760 TR |
3248 | int err; |
3249 | ||
3250 | drm_mode_config_reset(dev); | |
581e49fe | 3251 | |
b7ea04d2 | 3252 | DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err); |
869e188a | 3253 | |
b7ea04d2 | 3254 | err = drm_atomic_helper_commit_duplicated_state(state, &ctx); |
a5b8444e | 3255 | |
b7ea04d2 | 3256 | DRM_MODESET_LOCK_ALL_END(ctx, err); |
6d281b1f | 3257 | drm_atomic_state_put(state); |
14942760 TR |
3258 | |
3259 | return err; | |
3260 | } | |
3261 | EXPORT_SYMBOL(drm_atomic_helper_resume); | |
3262 | ||
8c3a8181 DV |
3263 | static int page_flip_common(struct drm_atomic_state *state, |
3264 | struct drm_crtc *crtc, | |
3265 | struct drm_framebuffer *fb, | |
3266 | struct drm_pending_vblank_event *event, | |
3267 | uint32_t flags) | |
f869a6ec AG |
3268 | { |
3269 | struct drm_plane *plane = crtc->primary; | |
3270 | struct drm_plane_state *plane_state; | |
3271 | struct drm_crtc_state *crtc_state; | |
3272 | int ret = 0; | |
3273 | ||
3274 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3275 | if (IS_ERR(crtc_state)) | |
3276 | return PTR_ERR(crtc_state); | |
3277 | ||
3278 | crtc_state->event = event; | |
6cbe5c46 | 3279 | crtc_state->pageflip_flags = flags; |
f869a6ec AG |
3280 | |
3281 | plane_state = drm_atomic_get_plane_state(state, plane); | |
3282 | if (IS_ERR(plane_state)) | |
3283 | return PTR_ERR(plane_state); | |
3284 | ||
f869a6ec AG |
3285 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
3286 | if (ret != 0) | |
3287 | return ret; | |
3288 | drm_atomic_set_fb_for_plane(plane_state, fb); | |
3289 | ||
3290 | /* Make sure we don't accidentally do a full modeset. */ | |
3291 | state->allow_modeset = false; | |
3292 | if (!crtc_state->active) { | |
6ac7c548 RK |
3293 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled, rejecting legacy flip\n", |
3294 | crtc->base.id, crtc->name); | |
f869a6ec AG |
3295 | return -EINVAL; |
3296 | } | |
3297 | ||
3298 | return ret; | |
3299 | } | |
3300 | ||
8bc0f312 DV |
3301 | /** |
3302 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
3303 | * @crtc: DRM crtc | |
3304 | * @fb: DRM framebuffer | |
3305 | * @event: optional DRM event to signal upon completion | |
3306 | * @flags: flip flags for non-vblank sync'ed updates | |
41292b1f | 3307 | * @ctx: lock acquisition context |
8bc0f312 | 3308 | * |
f869a6ec AG |
3309 | * Provides a default &drm_crtc_funcs.page_flip implementation |
3310 | * using the atomic driver interface. | |
8bc0f312 | 3311 | * |
8bc0f312 DV |
3312 | * Returns: |
3313 | * Returns 0 on success, negative errno numbers on failure. | |
f869a6ec AG |
3314 | * |
3315 | * See also: | |
3316 | * drm_atomic_helper_page_flip_target() | |
8bc0f312 DV |
3317 | */ |
3318 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
3319 | struct drm_framebuffer *fb, | |
3320 | struct drm_pending_vblank_event *event, | |
41292b1f DV |
3321 | uint32_t flags, |
3322 | struct drm_modeset_acquire_ctx *ctx) | |
8bc0f312 DV |
3323 | { |
3324 | struct drm_plane *plane = crtc->primary; | |
3325 | struct drm_atomic_state *state; | |
8bc0f312 DV |
3326 | int ret = 0; |
3327 | ||
8bc0f312 DV |
3328 | state = drm_atomic_state_alloc(plane->dev); |
3329 | if (!state) | |
3330 | return -ENOMEM; | |
3331 | ||
043e7fb6 | 3332 | state->acquire_ctx = ctx; |
f869a6ec | 3333 | |
6cbe5c46 | 3334 | ret = page_flip_common(state, crtc, fb, event, flags); |
f869a6ec | 3335 | if (ret != 0) |
8bc0f312 | 3336 | goto fail; |
8bc0f312 | 3337 | |
f869a6ec | 3338 | ret = drm_atomic_nonblocking_commit(state); |
f869a6ec | 3339 | fail: |
f869a6ec AG |
3340 | drm_atomic_state_put(state); |
3341 | return ret; | |
f869a6ec AG |
3342 | } |
3343 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
3344 | ||
3345 | /** | |
3346 | * drm_atomic_helper_page_flip_target - do page flip on target vblank period. | |
3347 | * @crtc: DRM crtc | |
3348 | * @fb: DRM framebuffer | |
3349 | * @event: optional DRM event to signal upon completion | |
3350 | * @flags: flip flags for non-vblank sync'ed updates | |
3351 | * @target: specifying the target vblank period when the flip to take effect | |
41292b1f | 3352 | * @ctx: lock acquisition context |
f869a6ec AG |
3353 | * |
3354 | * Provides a default &drm_crtc_funcs.page_flip_target implementation. | |
3355 | * Similar to drm_atomic_helper_page_flip() with extra parameter to specify | |
3356 | * target vblank period to flip. | |
3357 | * | |
3358 | * Returns: | |
3359 | * Returns 0 on success, negative errno numbers on failure. | |
3360 | */ | |
8c3a8181 DV |
3361 | int drm_atomic_helper_page_flip_target(struct drm_crtc *crtc, |
3362 | struct drm_framebuffer *fb, | |
3363 | struct drm_pending_vblank_event *event, | |
3364 | uint32_t flags, | |
3365 | uint32_t target, | |
3366 | struct drm_modeset_acquire_ctx *ctx) | |
f869a6ec AG |
3367 | { |
3368 | struct drm_plane *plane = crtc->primary; | |
3369 | struct drm_atomic_state *state; | |
3370 | struct drm_crtc_state *crtc_state; | |
3371 | int ret = 0; | |
3372 | ||
f869a6ec AG |
3373 | state = drm_atomic_state_alloc(plane->dev); |
3374 | if (!state) | |
3375 | return -ENOMEM; | |
3376 | ||
043e7fb6 | 3377 | state->acquire_ctx = ctx; |
f869a6ec | 3378 | |
6cbe5c46 | 3379 | ret = page_flip_common(state, crtc, fb, event, flags); |
8bc0f312 DV |
3380 | if (ret != 0) |
3381 | goto fail; | |
8bc0f312 | 3382 | |
b4d93679 | 3383 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); |
f869a6ec | 3384 | if (WARN_ON(!crtc_state)) { |
4cba6850 DV |
3385 | ret = -EINVAL; |
3386 | goto fail; | |
3387 | } | |
f869a6ec | 3388 | crtc_state->target_vblank = target; |
4cba6850 | 3389 | |
b837ba0a | 3390 | ret = drm_atomic_nonblocking_commit(state); |
8bc0f312 | 3391 | fail: |
0853695c | 3392 | drm_atomic_state_put(state); |
8bc0f312 | 3393 | return ret; |
8bc0f312 | 3394 | } |
f869a6ec | 3395 | EXPORT_SYMBOL(drm_atomic_helper_page_flip_target); |
1d8224e7 DV |
3396 | |
3397 | /** | |
3398 | * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table | |
3399 | * @crtc: CRTC object | |
3400 | * @red: red correction table | |
3401 | * @green: green correction table | |
3402 | * @blue: green correction table | |
3403 | * @size: size of the tables | |
3404 | * @ctx: lock acquire context | |
3405 | * | |
3406 | * Implements support for legacy gamma correction table for drivers | |
3407 | * that support color management through the DEGAMMA_LUT/GAMMA_LUT | |
3408 | * properties. See drm_crtc_enable_color_mgmt() and the containing chapter for | |
3409 | * how the atomic color management and gamma tables work. | |
3410 | */ | |
3411 | int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc, | |
3412 | u16 *red, u16 *green, u16 *blue, | |
3413 | uint32_t size, | |
3414 | struct drm_modeset_acquire_ctx *ctx) | |
3415 | { | |
3416 | struct drm_device *dev = crtc->dev; | |
3417 | struct drm_atomic_state *state; | |
3418 | struct drm_crtc_state *crtc_state; | |
3419 | struct drm_property_blob *blob = NULL; | |
3420 | struct drm_color_lut *blob_data; | |
3421 | int i, ret = 0; | |
3422 | bool replaced; | |
3423 | ||
3424 | state = drm_atomic_state_alloc(crtc->dev); | |
3425 | if (!state) | |
3426 | return -ENOMEM; | |
3427 | ||
3428 | blob = drm_property_create_blob(dev, | |
3429 | sizeof(struct drm_color_lut) * size, | |
3430 | NULL); | |
3431 | if (IS_ERR(blob)) { | |
3432 | ret = PTR_ERR(blob); | |
3433 | blob = NULL; | |
3434 | goto fail; | |
3435 | } | |
3436 | ||
3437 | /* Prepare GAMMA_LUT with the legacy values. */ | |
3438 | blob_data = blob->data; | |
3439 | for (i = 0; i < size; i++) { | |
3440 | blob_data[i].red = red[i]; | |
3441 | blob_data[i].green = green[i]; | |
3442 | blob_data[i].blue = blue[i]; | |
3443 | } | |
3444 | ||
3445 | state->acquire_ctx = ctx; | |
3446 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3447 | if (IS_ERR(crtc_state)) { | |
3448 | ret = PTR_ERR(crtc_state); | |
3449 | goto fail; | |
3450 | } | |
3451 | ||
3452 | /* Reset DEGAMMA_LUT and CTM properties. */ | |
3453 | replaced = drm_property_replace_blob(&crtc_state->degamma_lut, NULL); | |
3454 | replaced |= drm_property_replace_blob(&crtc_state->ctm, NULL); | |
3455 | replaced |= drm_property_replace_blob(&crtc_state->gamma_lut, blob); | |
3456 | crtc_state->color_mgmt_changed |= replaced; | |
3457 | ||
3458 | ret = drm_atomic_commit(state); | |
3459 | ||
3460 | fail: | |
3461 | drm_atomic_state_put(state); | |
3462 | drm_property_blob_put(blob); | |
3463 | return ret; | |
3464 | } | |
3465 | EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set); |