Commit | Line | Data |
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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 | 28 | #include <linux/dma-fence.h> |
d4da4e33 | 29 | #include <linux/ktime.h> |
0500c04e | 30 | |
c2fcd274 | 31 | #include <drm/drm_atomic.h> |
0500c04e | 32 | #include <drm/drm_atomic_helper.h> |
72fdb40c | 33 | #include <drm/drm_atomic_uapi.h> |
ee68c743 | 34 | #include <drm/drm_bridge.h> |
0500c04e SR |
35 | #include <drm/drm_damage_helper.h> |
36 | #include <drm/drm_device.h> | |
77ef3857 | 37 | #include <drm/drm_drv.h> |
c2fcd274 | 38 | #include <drm/drm_plane_helper.h> |
0500c04e | 39 | #include <drm/drm_print.h> |
1452c25b | 40 | #include <drm/drm_self_refresh_helper.h> |
0500c04e | 41 | #include <drm/drm_vblank.h> |
935774cd | 42 | #include <drm/drm_writeback.h> |
c2fcd274 | 43 | |
faf94a08 | 44 | #include "drm_crtc_helper_internal.h" |
44d1240d MS |
45 | #include "drm_crtc_internal.h" |
46 | ||
3150c7d0 DV |
47 | /** |
48 | * DOC: overview | |
49 | * | |
50 | * This helper library provides implementations of check and commit functions on | |
51 | * top of the CRTC modeset helper callbacks and the plane helper callbacks. It | |
52 | * also provides convenience implementations for the atomic state handling | |
53 | * callbacks for drivers which don't need to subclass the drm core structures to | |
54 | * add their own additional internal state. | |
55 | * | |
56 | * This library also provides default implementations for the check callback in | |
26196f7e DV |
57 | * drm_atomic_helper_check() and for the commit callback with |
58 | * drm_atomic_helper_commit(). But the individual stages and callbacks are | |
59 | * exposed to allow drivers to mix and match and e.g. use the plane helpers only | |
3150c7d0 DV |
60 | * together with a driver private modeset implementation. |
61 | * | |
62 | * This library also provides implementations for all the legacy driver | |
26196f7e DV |
63 | * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(), |
64 | * drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the | |
3150c7d0 DV |
65 | * various functions to implement set_property callbacks. New drivers must not |
66 | * implement these functions themselves but must use the provided helpers. | |
092d01da DV |
67 | * |
68 | * The atomic helper uses the same function table structures as all other | |
ea0dd85a DV |
69 | * modesetting helpers. See the documentation for &struct drm_crtc_helper_funcs, |
70 | * struct &drm_encoder_helper_funcs and &struct drm_connector_helper_funcs. It | |
71 | * also shares the &struct drm_plane_helper_funcs function table with the plane | |
092d01da | 72 | * helpers. |
3150c7d0 | 73 | */ |
c2fcd274 DV |
74 | static void |
75 | drm_atomic_helper_plane_changed(struct drm_atomic_state *state, | |
415c3ac3 | 76 | struct drm_plane_state *old_plane_state, |
c2fcd274 DV |
77 | struct drm_plane_state *plane_state, |
78 | struct drm_plane *plane) | |
79 | { | |
80 | struct drm_crtc_state *crtc_state; | |
81 | ||
415c3ac3 | 82 | if (old_plane_state->crtc) { |
b4d93679 ML |
83 | crtc_state = drm_atomic_get_new_crtc_state(state, |
84 | old_plane_state->crtc); | |
c2fcd274 DV |
85 | |
86 | if (WARN_ON(!crtc_state)) | |
87 | return; | |
88 | ||
89 | crtc_state->planes_changed = true; | |
90 | } | |
91 | ||
92 | if (plane_state->crtc) { | |
b4d93679 | 93 | crtc_state = drm_atomic_get_new_crtc_state(state, plane_state->crtc); |
c2fcd274 DV |
94 | |
95 | if (WARN_ON(!crtc_state)) | |
96 | return; | |
97 | ||
98 | crtc_state->planes_changed = true; | |
99 | } | |
100 | } | |
101 | ||
8248b65d ML |
102 | static int handle_conflicting_encoders(struct drm_atomic_state *state, |
103 | bool disable_conflicting_encoders) | |
97ac3204 | 104 | { |
415c3ac3 | 105 | struct drm_connector_state *new_conn_state; |
40616a26 | 106 | struct drm_connector *connector; |
c36a3254 | 107 | struct drm_connector_list_iter conn_iter; |
40616a26 ML |
108 | struct drm_encoder *encoder; |
109 | unsigned encoder_mask = 0; | |
c36a3254 | 110 | int i, ret = 0; |
97ac3204 | 111 | |
8248b65d ML |
112 | /* |
113 | * First loop, find all newly assigned encoders from the connectors | |
114 | * part of the state. If the same encoder is assigned to multiple | |
115 | * connectors bail out. | |
116 | */ | |
415c3ac3 | 117 | for_each_new_connector_in_state(state, connector, new_conn_state, i) { |
40616a26 ML |
118 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; |
119 | struct drm_encoder *new_encoder; | |
120 | ||
415c3ac3 | 121 | if (!new_conn_state->crtc) |
97ac3204 DV |
122 | continue; |
123 | ||
40616a26 | 124 | if (funcs->atomic_best_encoder) |
eca22edb MR |
125 | new_encoder = funcs->atomic_best_encoder(connector, |
126 | state); | |
a0909cc5 | 127 | else if (funcs->best_encoder) |
40616a26 | 128 | new_encoder = funcs->best_encoder(connector); |
a0909cc5 | 129 | else |
a92462d6 | 130 | new_encoder = drm_connector_get_single_encoder(connector); |
40616a26 | 131 | |
8248b65d | 132 | if (new_encoder) { |
6f3be036 | 133 | if (encoder_mask & drm_encoder_mask(new_encoder)) { |
8248b65d ML |
134 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n", |
135 | new_encoder->base.id, new_encoder->name, | |
136 | connector->base.id, connector->name); | |
137 | ||
138 | return -EINVAL; | |
139 | } | |
140 | ||
6f3be036 | 141 | encoder_mask |= drm_encoder_mask(new_encoder); |
8248b65d | 142 | } |
97ac3204 DV |
143 | } |
144 | ||
8248b65d ML |
145 | if (!encoder_mask) |
146 | return 0; | |
97ac3204 | 147 | |
8248b65d ML |
148 | /* |
149 | * Second loop, iterate over all connectors not part of the state. | |
150 | * | |
151 | * If a conflicting encoder is found and disable_conflicting_encoders | |
152 | * is not set, an error is returned. Userspace can provide a solution | |
153 | * through the atomic ioctl. | |
154 | * | |
42240c90 TR |
155 | * If the flag is set conflicting connectors are removed from the CRTC |
156 | * and the CRTC is disabled if no encoder is left. This preserves | |
8248b65d ML |
157 | * compatibility with the legacy set_config behavior. |
158 | */ | |
b982dab1 | 159 | drm_connector_list_iter_begin(state->dev, &conn_iter); |
c36a3254 | 160 | drm_for_each_connector_iter(connector, &conn_iter) { |
40616a26 | 161 | struct drm_crtc_state *crtc_state; |
623369e5 | 162 | |
b4d93679 | 163 | if (drm_atomic_get_new_connector_state(state, connector)) |
40616a26 | 164 | continue; |
623369e5 | 165 | |
40616a26 | 166 | encoder = connector->state->best_encoder; |
6f3be036 | 167 | if (!encoder || !(encoder_mask & drm_encoder_mask(encoder))) |
623369e5 DV |
168 | continue; |
169 | ||
8248b65d ML |
170 | if (!disable_conflicting_encoders) { |
171 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n", | |
172 | encoder->base.id, encoder->name, | |
173 | connector->state->crtc->base.id, | |
174 | connector->state->crtc->name, | |
175 | connector->base.id, connector->name); | |
c36a3254 DV |
176 | ret = -EINVAL; |
177 | goto out; | |
8248b65d ML |
178 | } |
179 | ||
415c3ac3 ML |
180 | new_conn_state = drm_atomic_get_connector_state(state, connector); |
181 | if (IS_ERR(new_conn_state)) { | |
182 | ret = PTR_ERR(new_conn_state); | |
c36a3254 DV |
183 | goto out; |
184 | } | |
40616a26 ML |
185 | |
186 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n", | |
187 | encoder->base.id, encoder->name, | |
415c3ac3 | 188 | new_conn_state->crtc->base.id, new_conn_state->crtc->name, |
40616a26 ML |
189 | connector->base.id, connector->name); |
190 | ||
b4d93679 | 191 | crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); |
40616a26 | 192 | |
415c3ac3 | 193 | ret = drm_atomic_set_crtc_for_connector(new_conn_state, NULL); |
40616a26 | 194 | if (ret) |
c36a3254 | 195 | goto out; |
40616a26 ML |
196 | |
197 | if (!crtc_state->connector_mask) { | |
198 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, | |
199 | NULL); | |
200 | if (ret < 0) | |
c36a3254 | 201 | goto out; |
40616a26 ML |
202 | |
203 | crtc_state->active = false; | |
204 | } | |
623369e5 | 205 | } |
c36a3254 | 206 | out: |
b982dab1 | 207 | drm_connector_list_iter_end(&conn_iter); |
623369e5 | 208 | |
c36a3254 | 209 | return ret; |
623369e5 DV |
210 | } |
211 | ||
e87a52b3 ML |
212 | static void |
213 | set_best_encoder(struct drm_atomic_state *state, | |
214 | struct drm_connector_state *conn_state, | |
215 | struct drm_encoder *encoder) | |
216 | { | |
217 | struct drm_crtc_state *crtc_state; | |
218 | struct drm_crtc *crtc; | |
219 | ||
220 | if (conn_state->best_encoder) { | |
221 | /* Unset the encoder_mask in the old crtc state. */ | |
222 | crtc = conn_state->connector->state->crtc; | |
223 | ||
224 | /* A NULL crtc is an error here because we should have | |
dbe2d2bf | 225 | * duplicated a NULL best_encoder when crtc was NULL. |
e87a52b3 ML |
226 | * As an exception restoring duplicated atomic state |
227 | * during resume is allowed, so don't warn when | |
228 | * best_encoder is equal to encoder we intend to set. | |
229 | */ | |
230 | WARN_ON(!crtc && encoder != conn_state->best_encoder); | |
231 | if (crtc) { | |
b4d93679 | 232 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); |
e87a52b3 ML |
233 | |
234 | crtc_state->encoder_mask &= | |
6f3be036 | 235 | ~drm_encoder_mask(conn_state->best_encoder); |
e87a52b3 ML |
236 | } |
237 | } | |
238 | ||
239 | if (encoder) { | |
240 | crtc = conn_state->crtc; | |
241 | WARN_ON(!crtc); | |
242 | if (crtc) { | |
b4d93679 | 243 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); |
e87a52b3 ML |
244 | |
245 | crtc_state->encoder_mask |= | |
6f3be036 | 246 | drm_encoder_mask(encoder); |
e87a52b3 ML |
247 | } |
248 | } | |
249 | ||
250 | conn_state->best_encoder = encoder; | |
251 | } | |
252 | ||
ec5aaa58 | 253 | static void |
623369e5 | 254 | steal_encoder(struct drm_atomic_state *state, |
ff19b786 | 255 | struct drm_encoder *encoder) |
623369e5 | 256 | { |
623369e5 DV |
257 | struct drm_crtc_state *crtc_state; |
258 | struct drm_connector *connector; | |
415c3ac3 | 259 | struct drm_connector_state *old_connector_state, *new_connector_state; |
ec5aaa58 | 260 | int i; |
623369e5 | 261 | |
415c3ac3 | 262 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { |
ff19b786 | 263 | struct drm_crtc *encoder_crtc; |
623369e5 | 264 | |
415c3ac3 | 265 | if (new_connector_state->best_encoder != encoder) |
623369e5 DV |
266 | continue; |
267 | ||
415c3ac3 | 268 | encoder_crtc = old_connector_state->crtc; |
623369e5 | 269 | |
ff19b786 ML |
270 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n", |
271 | encoder->base.id, encoder->name, | |
272 | encoder_crtc->base.id, encoder_crtc->name); | |
e87a52b3 | 273 | |
415c3ac3 | 274 | set_best_encoder(state, new_connector_state, NULL); |
623369e5 | 275 | |
b4d93679 | 276 | crtc_state = drm_atomic_get_new_crtc_state(state, encoder_crtc); |
ff19b786 ML |
277 | crtc_state->connectors_changed = true; |
278 | ||
ec5aaa58 | 279 | return; |
623369e5 | 280 | } |
623369e5 DV |
281 | } |
282 | ||
283 | static int | |
9459545b ML |
284 | update_connector_routing(struct drm_atomic_state *state, |
285 | struct drm_connector *connector, | |
415c3ac3 ML |
286 | struct drm_connector_state *old_connector_state, |
287 | struct drm_connector_state *new_connector_state) | |
623369e5 | 288 | { |
b5ceff20 | 289 | const struct drm_connector_helper_funcs *funcs; |
623369e5 | 290 | struct drm_encoder *new_encoder; |
623369e5 | 291 | struct drm_crtc_state *crtc_state; |
623369e5 | 292 | |
17a38d9c DV |
293 | DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n", |
294 | connector->base.id, | |
295 | connector->name); | |
623369e5 | 296 | |
415c3ac3 ML |
297 | if (old_connector_state->crtc != new_connector_state->crtc) { |
298 | if (old_connector_state->crtc) { | |
b4d93679 | 299 | crtc_state = drm_atomic_get_new_crtc_state(state, old_connector_state->crtc); |
fc596660 | 300 | crtc_state->connectors_changed = true; |
623369e5 DV |
301 | } |
302 | ||
415c3ac3 | 303 | if (new_connector_state->crtc) { |
b4d93679 | 304 | crtc_state = drm_atomic_get_new_crtc_state(state, new_connector_state->crtc); |
fc596660 | 305 | crtc_state->connectors_changed = true; |
623369e5 DV |
306 | } |
307 | } | |
308 | ||
415c3ac3 | 309 | if (!new_connector_state->crtc) { |
17a38d9c | 310 | DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n", |
623369e5 DV |
311 | connector->base.id, |
312 | connector->name); | |
313 | ||
415c3ac3 | 314 | set_best_encoder(state, new_connector_state, NULL); |
623369e5 DV |
315 | |
316 | return 0; | |
317 | } | |
318 | ||
de9f8eea LP |
319 | crtc_state = drm_atomic_get_new_crtc_state(state, |
320 | new_connector_state->crtc); | |
321 | /* | |
322 | * For compatibility with legacy users, we want to make sure that | |
323 | * we allow DPMS On->Off modesets on unregistered connectors. Modesets | |
324 | * which would result in anything else must be considered invalid, to | |
325 | * avoid turning on new displays on dead connectors. | |
326 | * | |
327 | * Since the connector can be unregistered at any point during an | |
328 | * atomic check or commit, this is racy. But that's OK: all we care | |
329 | * about is ensuring that userspace can't do anything but shut off the | |
1e55a53a | 330 | * display on a connector that was destroyed after it's been notified, |
de9f8eea | 331 | * not before. |
022debad LP |
332 | * |
333 | * Additionally, we also want to ignore connector registration when | |
334 | * we're trying to restore an atomic state during system resume since | |
335 | * there's a chance the connector may have been destroyed during the | |
336 | * process, but it's better to ignore that then cause | |
337 | * drm_atomic_helper_resume() to fail. | |
de9f8eea | 338 | */ |
022debad LP |
339 | if (!state->duplicated && drm_connector_is_unregistered(connector) && |
340 | crtc_state->active) { | |
de9f8eea LP |
341 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] is not registered\n", |
342 | connector->base.id, connector->name); | |
343 | return -EINVAL; | |
344 | } | |
345 | ||
623369e5 | 346 | funcs = connector->helper_private; |
3b8a684b DV |
347 | |
348 | if (funcs->atomic_best_encoder) | |
eca22edb | 349 | new_encoder = funcs->atomic_best_encoder(connector, state); |
c61b93fe | 350 | else if (funcs->best_encoder) |
3b8a684b | 351 | new_encoder = funcs->best_encoder(connector); |
c61b93fe | 352 | else |
a92462d6 | 353 | new_encoder = drm_connector_get_single_encoder(connector); |
623369e5 DV |
354 | |
355 | if (!new_encoder) { | |
17a38d9c DV |
356 | DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n", |
357 | connector->base.id, | |
358 | connector->name); | |
623369e5 DV |
359 | return -EINVAL; |
360 | } | |
361 | ||
415c3ac3 | 362 | if (!drm_encoder_crtc_ok(new_encoder, new_connector_state->crtc)) { |
6ac7c548 | 363 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d:%s]\n", |
5481c8fb DV |
364 | new_encoder->base.id, |
365 | new_encoder->name, | |
415c3ac3 ML |
366 | new_connector_state->crtc->base.id, |
367 | new_connector_state->crtc->name); | |
5481c8fb DV |
368 | return -EINVAL; |
369 | } | |
370 | ||
415c3ac3 ML |
371 | if (new_encoder == new_connector_state->best_encoder) { |
372 | set_best_encoder(state, new_connector_state, new_encoder); | |
e87a52b3 | 373 | |
fa3ab4c2 | 374 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n", |
17a38d9c DV |
375 | connector->base.id, |
376 | connector->name, | |
377 | new_encoder->base.id, | |
378 | new_encoder->name, | |
415c3ac3 ML |
379 | new_connector_state->crtc->base.id, |
380 | new_connector_state->crtc->name); | |
623369e5 DV |
381 | |
382 | return 0; | |
383 | } | |
384 | ||
ec5aaa58 | 385 | steal_encoder(state, new_encoder); |
6ea76f3c | 386 | |
415c3ac3 | 387 | set_best_encoder(state, new_connector_state, new_encoder); |
e87a52b3 | 388 | |
fc596660 | 389 | crtc_state->connectors_changed = true; |
623369e5 | 390 | |
fa3ab4c2 | 391 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n", |
17a38d9c DV |
392 | connector->base.id, |
393 | connector->name, | |
394 | new_encoder->base.id, | |
395 | new_encoder->name, | |
415c3ac3 ML |
396 | new_connector_state->crtc->base.id, |
397 | new_connector_state->crtc->name); | |
623369e5 DV |
398 | |
399 | return 0; | |
400 | } | |
401 | ||
402 | static int | |
403 | mode_fixup(struct drm_atomic_state *state) | |
404 | { | |
df63b999 | 405 | struct drm_crtc *crtc; |
415c3ac3 | 406 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 407 | struct drm_connector *connector; |
415c3ac3 | 408 | struct drm_connector_state *new_conn_state; |
623369e5 | 409 | int i; |
f9ad86e4 | 410 | int ret; |
623369e5 | 411 | |
415c3ac3 ML |
412 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
413 | if (!new_crtc_state->mode_changed && | |
414 | !new_crtc_state->connectors_changed) | |
623369e5 DV |
415 | continue; |
416 | ||
415c3ac3 | 417 | drm_mode_copy(&new_crtc_state->adjusted_mode, &new_crtc_state->mode); |
623369e5 DV |
418 | } |
419 | ||
415c3ac3 | 420 | for_each_new_connector_in_state(state, connector, new_conn_state, i) { |
b5ceff20 | 421 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 422 | struct drm_encoder *encoder; |
35a61fe9 | 423 | struct drm_bridge *bridge; |
623369e5 | 424 | |
415c3ac3 | 425 | WARN_ON(!!new_conn_state->best_encoder != !!new_conn_state->crtc); |
623369e5 | 426 | |
415c3ac3 | 427 | if (!new_conn_state->crtc || !new_conn_state->best_encoder) |
623369e5 DV |
428 | continue; |
429 | ||
415c3ac3 | 430 | new_crtc_state = |
b4d93679 | 431 | drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); |
623369e5 DV |
432 | |
433 | /* | |
434 | * Each encoder has at most one connector (since we always steal | |
435 | * it away), so we won't call ->mode_fixup twice. | |
436 | */ | |
415c3ac3 | 437 | encoder = new_conn_state->best_encoder; |
623369e5 DV |
438 | funcs = encoder->helper_private; |
439 | ||
35a61fe9 | 440 | bridge = drm_bridge_chain_get_first_bridge(encoder); |
5061b8a9 BB |
441 | ret = drm_atomic_bridge_chain_check(bridge, |
442 | new_crtc_state, | |
443 | new_conn_state); | |
444 | if (ret) { | |
445 | DRM_DEBUG_ATOMIC("Bridge atomic check failed\n"); | |
446 | return ret; | |
623369e5 DV |
447 | } |
448 | ||
2827635e | 449 | if (funcs && funcs->atomic_check) { |
415c3ac3 ML |
450 | ret = funcs->atomic_check(encoder, new_crtc_state, |
451 | new_conn_state); | |
4cd4df80 | 452 | if (ret) { |
17a38d9c DV |
453 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n", |
454 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
455 | return ret; |
456 | } | |
2827635e | 457 | } else if (funcs && funcs->mode_fixup) { |
415c3ac3 ML |
458 | ret = funcs->mode_fixup(encoder, &new_crtc_state->mode, |
459 | &new_crtc_state->adjusted_mode); | |
4cd4df80 | 460 | if (!ret) { |
17a38d9c DV |
461 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n", |
462 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
463 | return -EINVAL; |
464 | } | |
623369e5 DV |
465 | } |
466 | } | |
467 | ||
415c3ac3 | 468 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
b5ceff20 | 469 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 470 | |
415c3ac3 | 471 | if (!new_crtc_state->enable) |
f55f1701 LY |
472 | continue; |
473 | ||
415c3ac3 ML |
474 | if (!new_crtc_state->mode_changed && |
475 | !new_crtc_state->connectors_changed) | |
623369e5 DV |
476 | continue; |
477 | ||
478 | funcs = crtc->helper_private; | |
26564be5 | 479 | if (!funcs || !funcs->mode_fixup) |
840bfe95 ACO |
480 | continue; |
481 | ||
415c3ac3 ML |
482 | ret = funcs->mode_fixup(crtc, &new_crtc_state->mode, |
483 | &new_crtc_state->adjusted_mode); | |
623369e5 | 484 | if (!ret) { |
fa3ab4c2 VS |
485 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n", |
486 | crtc->base.id, crtc->name); | |
623369e5 DV |
487 | return -EINVAL; |
488 | } | |
489 | } | |
490 | ||
491 | return 0; | |
492 | } | |
493 | ||
faf94a08 JA |
494 | static enum drm_mode_status mode_valid_path(struct drm_connector *connector, |
495 | struct drm_encoder *encoder, | |
496 | struct drm_crtc *crtc, | |
8518f05a | 497 | const struct drm_display_mode *mode) |
faf94a08 | 498 | { |
35a61fe9 | 499 | struct drm_bridge *bridge; |
faf94a08 JA |
500 | enum drm_mode_status ret; |
501 | ||
502 | ret = drm_encoder_mode_valid(encoder, mode); | |
503 | if (ret != MODE_OK) { | |
504 | DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] mode_valid() failed\n", | |
505 | encoder->base.id, encoder->name); | |
506 | return ret; | |
507 | } | |
508 | ||
35a61fe9 | 509 | bridge = drm_bridge_chain_get_first_bridge(encoder); |
12c683e1 LP |
510 | ret = drm_bridge_chain_mode_valid(bridge, &connector->display_info, |
511 | mode); | |
faf94a08 JA |
512 | if (ret != MODE_OK) { |
513 | DRM_DEBUG_ATOMIC("[BRIDGE] mode_valid() failed\n"); | |
514 | return ret; | |
515 | } | |
516 | ||
517 | ret = drm_crtc_mode_valid(crtc, mode); | |
518 | if (ret != MODE_OK) { | |
519 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode_valid() failed\n", | |
520 | crtc->base.id, crtc->name); | |
521 | return ret; | |
522 | } | |
523 | ||
524 | return ret; | |
525 | } | |
526 | ||
527 | static int | |
528 | mode_valid(struct drm_atomic_state *state) | |
529 | { | |
530 | struct drm_connector_state *conn_state; | |
531 | struct drm_connector *connector; | |
532 | int i; | |
533 | ||
534 | for_each_new_connector_in_state(state, connector, conn_state, i) { | |
535 | struct drm_encoder *encoder = conn_state->best_encoder; | |
536 | struct drm_crtc *crtc = conn_state->crtc; | |
537 | struct drm_crtc_state *crtc_state; | |
538 | enum drm_mode_status mode_status; | |
8518f05a | 539 | const struct drm_display_mode *mode; |
faf94a08 JA |
540 | |
541 | if (!crtc || !encoder) | |
542 | continue; | |
543 | ||
544 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); | |
545 | if (!crtc_state) | |
546 | continue; | |
547 | if (!crtc_state->mode_changed && !crtc_state->connectors_changed) | |
548 | continue; | |
549 | ||
550 | mode = &crtc_state->mode; | |
551 | ||
552 | mode_status = mode_valid_path(connector, encoder, crtc, mode); | |
553 | if (mode_status != MODE_OK) | |
554 | return -EINVAL; | |
555 | } | |
556 | ||
557 | return 0; | |
558 | } | |
559 | ||
d9b13620 | 560 | /** |
f98bd3ef | 561 | * drm_atomic_helper_check_modeset - validate state object for modeset changes |
d9b13620 DV |
562 | * @dev: DRM device |
563 | * @state: the driver state object | |
564 | * | |
565 | * Check the state object to see if the requested state is physically possible. | |
42240c90 | 566 | * This does all the CRTC and connector related computations for an atomic |
ce09d766 ML |
567 | * update and adds any additional connectors needed for full modesets. It calls |
568 | * the various per-object callbacks in the follow order: | |
569 | * | |
570 | * 1. &drm_connector_helper_funcs.atomic_best_encoder for determining the new encoder. | |
571 | * 2. &drm_connector_helper_funcs.atomic_check to validate the connector state. | |
dbe2d2bf | 572 | * 3. If it's determined a modeset is needed then all connectors on the affected |
42240c90 | 573 | * CRTC are added and &drm_connector_helper_funcs.atomic_check is run on them. |
faf94a08 JA |
574 | * 4. &drm_encoder_helper_funcs.mode_valid, &drm_bridge_funcs.mode_valid and |
575 | * &drm_crtc_helper_funcs.mode_valid are called on the affected components. | |
576 | * 5. &drm_bridge_funcs.mode_fixup is called on all encoder bridges. | |
577 | * 6. &drm_encoder_helper_funcs.atomic_check is called to validate any encoder state. | |
42240c90 | 578 | * This function is only called when the encoder will be part of a configured CRTC, |
ce09d766 ML |
579 | * it must not be used for implementing connector property validation. |
580 | * If this function is NULL, &drm_atomic_encoder_helper_funcs.mode_fixup is called | |
581 | * instead. | |
42240c90 | 582 | * 7. &drm_crtc_helper_funcs.mode_fixup is called last, to fix up the mode with CRTC constraints. |
6806cdf9 DV |
583 | * |
584 | * &drm_crtc_state.mode_changed is set when the input mode is changed. | |
585 | * &drm_crtc_state.connectors_changed is set when a connector is added or | |
42240c90 | 586 | * removed from the CRTC. &drm_crtc_state.active_changed is set when |
6806cdf9 | 587 | * &drm_crtc_state.active changes, which is used for DPMS. |
7beb691f | 588 | * &drm_crtc_state.no_vblank is set from the result of drm_dev_has_vblank(). |
d807ed1c | 589 | * See also: drm_atomic_crtc_needs_modeset() |
d9b13620 DV |
590 | * |
591 | * IMPORTANT: | |
592 | * | |
6806cdf9 DV |
593 | * Drivers which set &drm_crtc_state.mode_changed (e.g. in their |
594 | * &drm_plane_helper_funcs.atomic_check hooks if a plane update can't be done | |
595 | * without a full modeset) _must_ call this function afterwards after that | |
596 | * change. It is permitted to call this function multiple times for the same | |
597 | * update, e.g. when the &drm_crtc_helper_funcs.atomic_check functions depend | |
598 | * upon the adjusted dotclock for fifo space allocation and watermark | |
599 | * computation. | |
d9b13620 | 600 | * |
c39032a8 | 601 | * RETURNS: |
d9b13620 DV |
602 | * Zero for success or -errno |
603 | */ | |
604 | int | |
934ce1c2 | 605 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
606 | struct drm_atomic_state *state) |
607 | { | |
623369e5 | 608 | struct drm_crtc *crtc; |
415c3ac3 | 609 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
df63b999 | 610 | struct drm_connector *connector; |
415c3ac3 | 611 | struct drm_connector_state *old_connector_state, *new_connector_state; |
623369e5 | 612 | int i, ret; |
ce09d766 | 613 | unsigned connectors_mask = 0; |
623369e5 | 614 | |
415c3ac3 | 615 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
970ece83 ML |
616 | bool has_connectors = |
617 | !!new_crtc_state->connector_mask; | |
618 | ||
869e188a DV |
619 | WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); |
620 | ||
415c3ac3 | 621 | if (!drm_mode_equal(&old_crtc_state->mode, &new_crtc_state->mode)) { |
fa3ab4c2 VS |
622 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n", |
623 | crtc->base.id, crtc->name); | |
415c3ac3 | 624 | new_crtc_state->mode_changed = true; |
623369e5 DV |
625 | } |
626 | ||
415c3ac3 | 627 | if (old_crtc_state->enable != new_crtc_state->enable) { |
fa3ab4c2 VS |
628 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n", |
629 | crtc->base.id, crtc->name); | |
fc596660 ML |
630 | |
631 | /* | |
632 | * For clarity this assignment is done here, but | |
633 | * enable == 0 is only true when there are no | |
634 | * connectors and a NULL mode. | |
635 | * | |
636 | * The other way around is true as well. enable != 0 | |
637 | * iff connectors are attached and a mode is set. | |
638 | */ | |
415c3ac3 ML |
639 | new_crtc_state->mode_changed = true; |
640 | new_crtc_state->connectors_changed = true; | |
623369e5 | 641 | } |
24d6652c ML |
642 | |
643 | if (old_crtc_state->active != new_crtc_state->active) { | |
644 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n", | |
645 | crtc->base.id, crtc->name); | |
646 | new_crtc_state->active_changed = true; | |
647 | } | |
970ece83 ML |
648 | |
649 | if (new_crtc_state->enable != has_connectors) { | |
650 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n", | |
651 | crtc->base.id, crtc->name); | |
652 | ||
653 | return -EINVAL; | |
654 | } | |
7beb691f TZ |
655 | |
656 | if (drm_dev_has_vblank(dev)) | |
657 | new_crtc_state->no_vblank = false; | |
658 | else | |
659 | new_crtc_state->no_vblank = true; | |
623369e5 DV |
660 | } |
661 | ||
44596b8c | 662 | ret = handle_conflicting_encoders(state, false); |
8248b65d ML |
663 | if (ret) |
664 | return ret; | |
40616a26 | 665 | |
415c3ac3 | 666 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { |
ce09d766 ML |
667 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; |
668 | ||
869e188a DV |
669 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); |
670 | ||
623369e5 | 671 | /* |
d807ed1c BS |
672 | * This only sets crtc->connectors_changed for routing changes, |
673 | * drivers must set crtc->connectors_changed themselves when | |
674 | * connector properties need to be updated. | |
623369e5 | 675 | */ |
9459545b | 676 | ret = update_connector_routing(state, connector, |
415c3ac3 ML |
677 | old_connector_state, |
678 | new_connector_state); | |
623369e5 DV |
679 | if (ret) |
680 | return ret; | |
415c3ac3 | 681 | if (old_connector_state->crtc) { |
b4d93679 ML |
682 | new_crtc_state = drm_atomic_get_new_crtc_state(state, |
683 | old_connector_state->crtc); | |
415c3ac3 ML |
684 | if (old_connector_state->link_status != |
685 | new_connector_state->link_status) | |
686 | new_crtc_state->connectors_changed = true; | |
47e22ff1 RS |
687 | |
688 | if (old_connector_state->max_requested_bpc != | |
689 | new_connector_state->max_requested_bpc) | |
690 | new_crtc_state->connectors_changed = true; | |
40ee6fbe | 691 | } |
ce09d766 ML |
692 | |
693 | if (funcs->atomic_check) | |
6f3b6278 | 694 | ret = funcs->atomic_check(connector, state); |
ce09d766 ML |
695 | if (ret) |
696 | return ret; | |
697 | ||
ca52bea9 | 698 | connectors_mask |= BIT(i); |
623369e5 DV |
699 | } |
700 | ||
701 | /* | |
702 | * After all the routing has been prepared we need to add in any | |
42240c90 | 703 | * connector which is itself unchanged, but whose CRTC changes its |
623369e5 DV |
704 | * configuration. This must be done before calling mode_fixup in case a |
705 | * crtc only changed its mode but has the same set of connectors. | |
706 | */ | |
415c3ac3 | 707 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
415c3ac3 | 708 | if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) |
623369e5 DV |
709 | continue; |
710 | ||
fa3ab4c2 VS |
711 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n", |
712 | crtc->base.id, crtc->name, | |
415c3ac3 ML |
713 | new_crtc_state->enable ? 'y' : 'n', |
714 | new_crtc_state->active ? 'y' : 'n'); | |
623369e5 DV |
715 | |
716 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
717 | if (ret != 0) | |
718 | return ret; | |
719 | ||
57744aa7 ML |
720 | ret = drm_atomic_add_affected_planes(state, crtc); |
721 | if (ret != 0) | |
722 | return ret; | |
623369e5 DV |
723 | } |
724 | ||
ce09d766 ML |
725 | /* |
726 | * Iterate over all connectors again, to make sure atomic_check() | |
727 | * has been called on them when a modeset is forced. | |
728 | */ | |
729 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { | |
730 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; | |
731 | ||
732 | if (connectors_mask & BIT(i)) | |
733 | continue; | |
734 | ||
735 | if (funcs->atomic_check) | |
6f3b6278 | 736 | ret = funcs->atomic_check(connector, state); |
ce09d766 ML |
737 | if (ret) |
738 | return ret; | |
739 | } | |
740 | ||
75146591 BB |
741 | /* |
742 | * Iterate over all connectors again, and add all affected bridges to | |
743 | * the state. | |
744 | */ | |
745 | for_each_oldnew_connector_in_state(state, connector, | |
746 | old_connector_state, | |
747 | new_connector_state, i) { | |
748 | struct drm_encoder *encoder; | |
749 | ||
750 | encoder = old_connector_state->best_encoder; | |
751 | ret = drm_atomic_add_encoder_bridges(state, encoder); | |
752 | if (ret) | |
753 | return ret; | |
754 | ||
755 | encoder = new_connector_state->best_encoder; | |
756 | ret = drm_atomic_add_encoder_bridges(state, encoder); | |
757 | if (ret) | |
758 | return ret; | |
759 | } | |
760 | ||
faf94a08 JA |
761 | ret = mode_valid(state); |
762 | if (ret) | |
763 | return ret; | |
764 | ||
623369e5 DV |
765 | return mode_fixup(state); |
766 | } | |
d9b13620 | 767 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 768 | |
a01cb8ba VS |
769 | /** |
770 | * drm_atomic_helper_check_plane_state() - Check plane state for validity | |
771 | * @plane_state: plane state to check | |
42240c90 | 772 | * @crtc_state: CRTC state to check |
a01cb8ba VS |
773 | * @min_scale: minimum @src:@dest scaling factor in 16.16 fixed point |
774 | * @max_scale: maximum @src:@dest scaling factor in 16.16 fixed point | |
775 | * @can_position: is it legal to position the plane such that it | |
42240c90 | 776 | * doesn't cover the entire CRTC? This will generally |
a01cb8ba | 777 | * only be false for primary planes. |
42240c90 | 778 | * @can_update_disabled: can the plane be updated while the CRTC |
a01cb8ba VS |
779 | * is disabled? |
780 | * | |
781 | * Checks that a desired plane update is valid, and updates various | |
782 | * bits of derived state (clipped coordinates etc.). Drivers that provide | |
783 | * their own plane handling rather than helper-provided implementations may | |
784 | * still wish to call this function to avoid duplication of error checking | |
785 | * code. | |
786 | * | |
787 | * RETURNS: | |
788 | * Zero if update appears valid, error code on failure | |
789 | */ | |
790 | int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state, | |
791 | const struct drm_crtc_state *crtc_state, | |
a01cb8ba VS |
792 | int min_scale, |
793 | int max_scale, | |
794 | bool can_position, | |
795 | bool can_update_disabled) | |
796 | { | |
797 | struct drm_framebuffer *fb = plane_state->fb; | |
798 | struct drm_rect *src = &plane_state->src; | |
799 | struct drm_rect *dst = &plane_state->dst; | |
800 | unsigned int rotation = plane_state->rotation; | |
81af63a4 | 801 | struct drm_rect clip = {}; |
a01cb8ba VS |
802 | int hscale, vscale; |
803 | ||
804 | WARN_ON(plane_state->crtc && plane_state->crtc != crtc_state->crtc); | |
805 | ||
806 | *src = drm_plane_state_src(plane_state); | |
807 | *dst = drm_plane_state_dest(plane_state); | |
808 | ||
809 | if (!fb) { | |
810 | plane_state->visible = false; | |
811 | return 0; | |
812 | } | |
813 | ||
814 | /* crtc should only be NULL when disabling (i.e., !fb) */ | |
815 | if (WARN_ON(!plane_state->crtc)) { | |
816 | plane_state->visible = false; | |
817 | return 0; | |
818 | } | |
819 | ||
820 | if (!crtc_state->enable && !can_update_disabled) { | |
821 | DRM_DEBUG_KMS("Cannot update plane of a disabled CRTC.\n"); | |
822 | return -EINVAL; | |
823 | } | |
824 | ||
825 | drm_rect_rotate(src, fb->width << 16, fb->height << 16, rotation); | |
826 | ||
827 | /* Check scaling */ | |
828 | hscale = drm_rect_calc_hscale(src, dst, min_scale, max_scale); | |
829 | vscale = drm_rect_calc_vscale(src, dst, min_scale, max_scale); | |
830 | if (hscale < 0 || vscale < 0) { | |
831 | DRM_DEBUG_KMS("Invalid scaling of plane\n"); | |
832 | drm_rect_debug_print("src: ", &plane_state->src, true); | |
833 | drm_rect_debug_print("dst: ", &plane_state->dst, false); | |
834 | return -ERANGE; | |
835 | } | |
836 | ||
81af63a4 VS |
837 | if (crtc_state->enable) |
838 | drm_mode_get_hv_timing(&crtc_state->mode, &clip.x2, &clip.y2); | |
839 | ||
f96bdf56 | 840 | plane_state->visible = drm_rect_clip_scaled(src, dst, &clip); |
a01cb8ba VS |
841 | |
842 | drm_rect_rotate_inv(src, fb->width << 16, fb->height << 16, rotation); | |
843 | ||
844 | if (!plane_state->visible) | |
845 | /* | |
846 | * Plane isn't visible; some drivers can handle this | |
847 | * so we just return success here. Drivers that can't | |
848 | * (including those that use the primary plane helper's | |
849 | * update function) will return an error from their | |
850 | * update_plane handler. | |
851 | */ | |
852 | return 0; | |
853 | ||
81af63a4 | 854 | if (!can_position && !drm_rect_equals(dst, &clip)) { |
a01cb8ba VS |
855 | DRM_DEBUG_KMS("Plane must cover entire CRTC\n"); |
856 | drm_rect_debug_print("dst: ", dst, false); | |
81af63a4 | 857 | drm_rect_debug_print("clip: ", &clip, false); |
a01cb8ba VS |
858 | return -EINVAL; |
859 | } | |
860 | ||
861 | return 0; | |
862 | } | |
863 | EXPORT_SYMBOL(drm_atomic_helper_check_plane_state); | |
864 | ||
c2fcd274 | 865 | /** |
f98bd3ef | 866 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
867 | * @dev: DRM device |
868 | * @state: the driver state object | |
869 | * | |
870 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 | 871 | * This does all the plane update related checks using by calling into the |
6806cdf9 DV |
872 | * &drm_crtc_helper_funcs.atomic_check and &drm_plane_helper_funcs.atomic_check |
873 | * hooks provided by the driver. | |
c2fcd274 | 874 | * |
42240c90 | 875 | * It also sets &drm_crtc_state.planes_changed to indicate that a CRTC has |
fc596660 ML |
876 | * updated planes. |
877 | * | |
c39032a8 | 878 | * RETURNS: |
c2fcd274 DV |
879 | * Zero for success or -errno |
880 | */ | |
d9b13620 DV |
881 | int |
882 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
883 | struct drm_atomic_state *state) | |
c2fcd274 | 884 | { |
df63b999 | 885 | struct drm_crtc *crtc; |
415c3ac3 | 886 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 887 | struct drm_plane *plane; |
415c3ac3 | 888 | struct drm_plane_state *new_plane_state, *old_plane_state; |
c2fcd274 DV |
889 | int i, ret = 0; |
890 | ||
415c3ac3 | 891 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { |
b5ceff20 | 892 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 893 | |
869e188a DV |
894 | WARN_ON(!drm_modeset_is_locked(&plane->mutex)); |
895 | ||
c2fcd274 DV |
896 | funcs = plane->helper_private; |
897 | ||
415c3ac3 | 898 | drm_atomic_helper_plane_changed(state, old_plane_state, new_plane_state, plane); |
c2fcd274 | 899 | |
d9778b40 DR |
900 | drm_atomic_helper_check_plane_damage(state, new_plane_state); |
901 | ||
c2fcd274 DV |
902 | if (!funcs || !funcs->atomic_check) |
903 | continue; | |
904 | ||
415c3ac3 | 905 | ret = funcs->atomic_check(plane, new_plane_state); |
c2fcd274 | 906 | if (ret) { |
9f4c97a2 VS |
907 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n", |
908 | plane->base.id, plane->name); | |
c2fcd274 DV |
909 | return ret; |
910 | } | |
911 | } | |
912 | ||
415c3ac3 | 913 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
b5ceff20 | 914 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
915 | |
916 | funcs = crtc->helper_private; | |
917 | ||
918 | if (!funcs || !funcs->atomic_check) | |
919 | continue; | |
920 | ||
29b77ad7 | 921 | ret = funcs->atomic_check(crtc, state); |
c2fcd274 | 922 | if (ret) { |
fa3ab4c2 VS |
923 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n", |
924 | crtc->base.id, crtc->name); | |
c2fcd274 DV |
925 | return ret; |
926 | } | |
927 | } | |
928 | ||
d9b13620 DV |
929 | return ret; |
930 | } | |
931 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
932 | ||
933 | /** | |
934 | * drm_atomic_helper_check - validate state object | |
935 | * @dev: DRM device | |
936 | * @state: the driver state object | |
937 | * | |
938 | * Check the state object to see if the requested state is physically possible. | |
42240c90 | 939 | * Only CRTCs and planes have check callbacks, so for any additional (global) |
d9b13620 | 940 | * checking that a driver needs it can simply wrap that around this function. |
6806cdf9 DV |
941 | * Drivers without such needs can directly use this as their |
942 | * &drm_mode_config_funcs.atomic_check callback. | |
d9b13620 | 943 | * |
b4274fbe DV |
944 | * This just wraps the two parts of the state checking for planes and modeset |
945 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
946 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
6806cdf9 DV |
947 | * @drm_plane_helper_funcs.atomic_check and @drm_crtc_helper_funcs.atomic_check |
948 | * functions depend upon an updated adjusted_mode.clock to e.g. properly compute | |
949 | * watermarks. | |
b4274fbe | 950 | * |
49efffc7 PU |
951 | * Note that zpos normalization will add all enable planes to the state which |
952 | * might not desired for some drivers. | |
953 | * For example enable/disable of a cursor plane which have fixed zpos value | |
954 | * would trigger all other enabled planes to be forced to the state change. | |
955 | * | |
c39032a8 | 956 | * RETURNS: |
d9b13620 DV |
957 | * Zero for success or -errno |
958 | */ | |
959 | int drm_atomic_helper_check(struct drm_device *dev, | |
960 | struct drm_atomic_state *state) | |
961 | { | |
962 | int ret; | |
963 | ||
b4274fbe | 964 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
965 | if (ret) |
966 | return ret; | |
967 | ||
49efffc7 PU |
968 | if (dev->mode_config.normalize_zpos) { |
969 | ret = drm_atomic_normalize_zpos(dev, state); | |
970 | if (ret) | |
971 | return ret; | |
972 | } | |
973 | ||
b4274fbe | 974 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
975 | if (ret) |
976 | return ret; | |
977 | ||
fef9df8b GP |
978 | if (state->legacy_cursor_update) |
979 | state->async_update = !drm_atomic_helper_async_check(dev, state); | |
980 | ||
1452c25b SP |
981 | drm_self_refresh_helper_alter_state(state); |
982 | ||
c2fcd274 DV |
983 | return ret; |
984 | } | |
985 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
986 | ||
1452c25b SP |
987 | static bool |
988 | crtc_needs_disable(struct drm_crtc_state *old_state, | |
989 | struct drm_crtc_state *new_state) | |
990 | { | |
991 | /* | |
42240c90 | 992 | * No new_state means the CRTC is off, so the only criteria is whether |
1452c25b SP |
993 | * it's currently active or in self refresh mode. |
994 | */ | |
995 | if (!new_state) | |
996 | return drm_atomic_crtc_effectively_active(old_state); | |
997 | ||
998 | /* | |
42240c90 | 999 | * We need to run through the crtc_funcs->disable() function if the CRTC |
1452c25b SP |
1000 | * is currently on, if it's transitioning to self refresh mode, or if |
1001 | * it's in self refresh mode and needs to be fully disabled. | |
1002 | */ | |
1003 | return old_state->active || | |
1004 | (old_state->self_refresh_active && !new_state->enable) || | |
1005 | new_state->self_refresh_active; | |
1006 | } | |
1007 | ||
623369e5 DV |
1008 | static void |
1009 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
1010 | { | |
df63b999 | 1011 | struct drm_connector *connector; |
415c3ac3 | 1012 | struct drm_connector_state *old_conn_state, *new_conn_state; |
df63b999 | 1013 | struct drm_crtc *crtc; |
415c3ac3 | 1014 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
623369e5 DV |
1015 | int i; |
1016 | ||
415c3ac3 | 1017 | for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) { |
b5ceff20 | 1018 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 1019 | struct drm_encoder *encoder; |
35a61fe9 | 1020 | struct drm_bridge *bridge; |
623369e5 | 1021 | |
623369e5 DV |
1022 | /* Shut down everything that's in the changeset and currently |
1023 | * still on. So need to check the old, saved state. */ | |
df63b999 | 1024 | if (!old_conn_state->crtc) |
623369e5 DV |
1025 | continue; |
1026 | ||
b4d93679 | 1027 | old_crtc_state = drm_atomic_get_old_crtc_state(old_state, old_conn_state->crtc); |
eab3bbef | 1028 | |
1452c25b SP |
1029 | if (new_conn_state->crtc) |
1030 | new_crtc_state = drm_atomic_get_new_crtc_state( | |
1031 | old_state, | |
1032 | new_conn_state->crtc); | |
1033 | else | |
1034 | new_crtc_state = NULL; | |
1035 | ||
1036 | if (!crtc_needs_disable(old_crtc_state, new_crtc_state) || | |
2465ff62 | 1037 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) |
eab3bbef DV |
1038 | continue; |
1039 | ||
46df9adb | 1040 | encoder = old_conn_state->best_encoder; |
623369e5 | 1041 | |
46df9adb RC |
1042 | /* We shouldn't get this far if we didn't previously have |
1043 | * an encoder.. but WARN_ON() rather than explode. | |
1044 | */ | |
1045 | if (WARN_ON(!encoder)) | |
623369e5 DV |
1046 | continue; |
1047 | ||
1048 | funcs = encoder->helper_private; | |
1049 | ||
17a38d9c DV |
1050 | DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n", |
1051 | encoder->base.id, encoder->name); | |
95d6eb3b | 1052 | |
623369e5 DV |
1053 | /* |
1054 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 1055 | * it away), so we won't call disable hooks twice. |
623369e5 | 1056 | */ |
35a61fe9 BB |
1057 | bridge = drm_bridge_chain_get_first_bridge(encoder); |
1058 | drm_atomic_bridge_chain_disable(bridge, old_state); | |
623369e5 DV |
1059 | |
1060 | /* Right function depends upon target state. */ | |
2827635e | 1061 | if (funcs) { |
43c76d72 SP |
1062 | if (funcs->atomic_disable) |
1063 | funcs->atomic_disable(encoder, old_state); | |
1064 | else if (new_conn_state->crtc && funcs->prepare) | |
2827635e NT |
1065 | funcs->prepare(encoder); |
1066 | else if (funcs->disable) | |
1067 | funcs->disable(encoder); | |
1068 | else if (funcs->dpms) | |
1069 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
1070 | } | |
623369e5 | 1071 | |
35a61fe9 | 1072 | drm_atomic_bridge_chain_post_disable(bridge, old_state); |
623369e5 DV |
1073 | } |
1074 | ||
415c3ac3 | 1075 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
b5ceff20 | 1076 | const struct drm_crtc_helper_funcs *funcs; |
84014b0a | 1077 | int ret; |
623369e5 DV |
1078 | |
1079 | /* Shut down everything that needs a full modeset. */ | |
415c3ac3 | 1080 | if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) |
eab3bbef DV |
1081 | continue; |
1082 | ||
1452c25b | 1083 | if (!crtc_needs_disable(old_crtc_state, new_crtc_state)) |
623369e5 DV |
1084 | continue; |
1085 | ||
1086 | funcs = crtc->helper_private; | |
1087 | ||
fa3ab4c2 VS |
1088 | DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n", |
1089 | crtc->base.id, crtc->name); | |
95d6eb3b DV |
1090 | |
1091 | ||
623369e5 | 1092 | /* Right function depends upon target state. */ |
415c3ac3 | 1093 | if (new_crtc_state->enable && funcs->prepare) |
623369e5 | 1094 | funcs->prepare(crtc); |
c9ac8b4c | 1095 | else if (funcs->atomic_disable) |
351f950d | 1096 | funcs->atomic_disable(crtc, old_state); |
623369e5 DV |
1097 | else if (funcs->disable) |
1098 | funcs->disable(crtc); | |
fe616928 | 1099 | else if (funcs->dpms) |
623369e5 | 1100 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); |
84014b0a | 1101 | |
6015002e | 1102 | if (!drm_dev_has_vblank(dev)) |
84014b0a DV |
1103 | continue; |
1104 | ||
1105 | ret = drm_crtc_vblank_get(crtc); | |
1106 | WARN_ONCE(ret != -EINVAL, "driver forgot to call drm_crtc_vblank_off()\n"); | |
1107 | if (ret == 0) | |
1108 | drm_crtc_vblank_put(crtc); | |
623369e5 DV |
1109 | } |
1110 | } | |
1111 | ||
4c18d301 DV |
1112 | /** |
1113 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state | |
1114 | * @dev: DRM device | |
1115 | * @old_state: atomic state object with old state structures | |
1116 | * | |
1117 | * This function updates all the various legacy modeset state pointers in | |
441959eb | 1118 | * connectors, encoders and CRTCs. |
4c18d301 DV |
1119 | * |
1120 | * Drivers can use this for building their own atomic commit if they don't have | |
1121 | * a pure helper-based modeset implementation. | |
2e2b96ef DV |
1122 | * |
1123 | * Since these updates are not synchronized with lockings, only code paths | |
1124 | * called from &drm_mode_config_helper_funcs.atomic_commit_tail can look at the | |
1125 | * legacy state filled out by this helper. Defacto this means this helper and | |
1126 | * the legacy state pointers are only really useful for transitioning an | |
1127 | * existing driver to the atomic world. | |
4c18d301 DV |
1128 | */ |
1129 | void | |
1130 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, | |
1131 | struct drm_atomic_state *old_state) | |
623369e5 | 1132 | { |
df63b999 | 1133 | struct drm_connector *connector; |
415c3ac3 | 1134 | struct drm_connector_state *old_conn_state, *new_conn_state; |
df63b999 | 1135 | struct drm_crtc *crtc; |
415c3ac3 | 1136 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
1137 | int i; |
1138 | ||
8c10342c | 1139 | /* clear out existing links and update dpms */ |
415c3ac3 | 1140 | for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) { |
8c10342c ML |
1141 | if (connector->encoder) { |
1142 | WARN_ON(!connector->encoder->crtc); | |
1143 | ||
1144 | connector->encoder->crtc = NULL; | |
1145 | connector->encoder = NULL; | |
1146 | } | |
623369e5 | 1147 | |
415c3ac3 | 1148 | crtc = new_conn_state->crtc; |
8c10342c ML |
1149 | if ((!crtc && old_conn_state->crtc) || |
1150 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { | |
8c10342c | 1151 | int mode = DRM_MODE_DPMS_OFF; |
623369e5 | 1152 | |
8c10342c ML |
1153 | if (crtc && crtc->state->active) |
1154 | mode = DRM_MODE_DPMS_ON; | |
1155 | ||
1156 | connector->dpms = mode; | |
8c10342c | 1157 | } |
623369e5 DV |
1158 | } |
1159 | ||
1160 | /* set new links */ | |
415c3ac3 ML |
1161 | for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { |
1162 | if (!new_conn_state->crtc) | |
623369e5 DV |
1163 | continue; |
1164 | ||
415c3ac3 | 1165 | if (WARN_ON(!new_conn_state->best_encoder)) |
623369e5 DV |
1166 | continue; |
1167 | ||
415c3ac3 ML |
1168 | connector->encoder = new_conn_state->best_encoder; |
1169 | connector->encoder->crtc = new_conn_state->crtc; | |
623369e5 DV |
1170 | } |
1171 | ||
1172 | /* set legacy state in the crtc structure */ | |
415c3ac3 | 1173 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { |
2660801f | 1174 | struct drm_plane *primary = crtc->primary; |
b4d93679 | 1175 | struct drm_plane_state *new_plane_state; |
2660801f | 1176 | |
415c3ac3 ML |
1177 | crtc->mode = new_crtc_state->mode; |
1178 | crtc->enabled = new_crtc_state->enable; | |
2660801f | 1179 | |
b4d93679 ML |
1180 | new_plane_state = |
1181 | drm_atomic_get_new_plane_state(old_state, primary); | |
1182 | ||
1183 | if (new_plane_state && new_plane_state->crtc == crtc) { | |
1184 | crtc->x = new_plane_state->src_x >> 16; | |
1185 | crtc->y = new_plane_state->src_y >> 16; | |
2660801f | 1186 | } |
4b31a9c7 | 1187 | } |
4b31a9c7 VS |
1188 | } |
1189 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); | |
1190 | ||
1191 | /** | |
1192 | * drm_atomic_helper_calc_timestamping_constants - update vblank timestamping constants | |
1193 | * @state: atomic state object | |
1194 | * | |
1195 | * Updates the timestamping constants used for precise vblank timestamps | |
1196 | * by calling drm_calc_timestamping_constants() for all enabled crtcs in @state. | |
1197 | */ | |
1198 | void drm_atomic_helper_calc_timestamping_constants(struct drm_atomic_state *state) | |
1199 | { | |
1200 | struct drm_crtc_state *new_crtc_state; | |
1201 | struct drm_crtc *crtc; | |
1202 | int i; | |
3d51d2d2 | 1203 | |
4b31a9c7 | 1204 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
415c3ac3 | 1205 | if (new_crtc_state->enable) |
3d51d2d2 | 1206 | drm_calc_timestamping_constants(crtc, |
415c3ac3 | 1207 | &new_crtc_state->adjusted_mode); |
623369e5 DV |
1208 | } |
1209 | } | |
4b31a9c7 | 1210 | EXPORT_SYMBOL(drm_atomic_helper_calc_timestamping_constants); |
623369e5 DV |
1211 | |
1212 | static void | |
1213 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
1214 | { | |
df63b999 | 1215 | struct drm_crtc *crtc; |
415c3ac3 | 1216 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 1217 | struct drm_connector *connector; |
415c3ac3 | 1218 | struct drm_connector_state *new_conn_state; |
623369e5 DV |
1219 | int i; |
1220 | ||
415c3ac3 | 1221 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { |
b5ceff20 | 1222 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 1223 | |
415c3ac3 | 1224 | if (!new_crtc_state->mode_changed) |
623369e5 DV |
1225 | continue; |
1226 | ||
1227 | funcs = crtc->helper_private; | |
1228 | ||
415c3ac3 | 1229 | if (new_crtc_state->enable && funcs->mode_set_nofb) { |
fa3ab4c2 VS |
1230 | DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n", |
1231 | crtc->base.id, crtc->name); | |
95d6eb3b | 1232 | |
623369e5 | 1233 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 1234 | } |
623369e5 DV |
1235 | } |
1236 | ||
415c3ac3 | 1237 | for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { |
b5ceff20 | 1238 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
1239 | struct drm_encoder *encoder; |
1240 | struct drm_display_mode *mode, *adjusted_mode; | |
35a61fe9 | 1241 | struct drm_bridge *bridge; |
623369e5 | 1242 | |
415c3ac3 | 1243 | if (!new_conn_state->best_encoder) |
623369e5 DV |
1244 | continue; |
1245 | ||
415c3ac3 | 1246 | encoder = new_conn_state->best_encoder; |
623369e5 | 1247 | funcs = encoder->helper_private; |
415c3ac3 | 1248 | new_crtc_state = new_conn_state->crtc->state; |
623369e5 DV |
1249 | mode = &new_crtc_state->mode; |
1250 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
1251 | ||
eab3bbef DV |
1252 | if (!new_crtc_state->mode_changed) |
1253 | continue; | |
1254 | ||
17a38d9c DV |
1255 | DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n", |
1256 | encoder->base.id, encoder->name); | |
95d6eb3b | 1257 | |
623369e5 DV |
1258 | /* |
1259 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 1260 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 1261 | */ |
fe4a11c9 PZ |
1262 | if (funcs && funcs->atomic_mode_set) { |
1263 | funcs->atomic_mode_set(encoder, new_crtc_state, | |
415c3ac3 | 1264 | new_conn_state); |
fe4a11c9 | 1265 | } else if (funcs && funcs->mode_set) { |
c982bd90 | 1266 | funcs->mode_set(encoder, mode, adjusted_mode); |
fe4a11c9 | 1267 | } |
623369e5 | 1268 | |
35a61fe9 BB |
1269 | bridge = drm_bridge_chain_get_first_bridge(encoder); |
1270 | drm_bridge_chain_mode_set(bridge, mode, adjusted_mode); | |
623369e5 DV |
1271 | } |
1272 | } | |
1273 | ||
1274 | /** | |
1af434a9 | 1275 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 1276 | * @dev: DRM device |
a072f809 | 1277 | * @old_state: atomic state object with old state structures |
623369e5 | 1278 | * |
1af434a9 | 1279 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 1280 | * prepares them (if required) with the new mode. |
1af434a9 | 1281 | * |
42240c90 | 1282 | * For compatibility with legacy CRTC helpers this should be called before |
1af434a9 DV |
1283 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
1284 | * does. But drivers with different needs can group the modeset commits together | |
1285 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
1286 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 1287 | */ |
1af434a9 DV |
1288 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
1289 | struct drm_atomic_state *old_state) | |
623369e5 | 1290 | { |
a072f809 | 1291 | disable_outputs(dev, old_state); |
4c18d301 DV |
1292 | |
1293 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); | |
441959eb | 1294 | drm_atomic_helper_calc_timestamping_constants(old_state); |
4c18d301 | 1295 | |
a072f809 | 1296 | crtc_set_mode(dev, old_state); |
623369e5 | 1297 | } |
1af434a9 | 1298 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 | 1299 | |
935774cd BS |
1300 | static void drm_atomic_helper_commit_writebacks(struct drm_device *dev, |
1301 | struct drm_atomic_state *old_state) | |
1302 | { | |
1303 | struct drm_connector *connector; | |
1304 | struct drm_connector_state *new_conn_state; | |
1305 | int i; | |
1306 | ||
1307 | for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { | |
1308 | const struct drm_connector_helper_funcs *funcs; | |
1309 | ||
1310 | funcs = connector->helper_private; | |
814bde99 BB |
1311 | if (!funcs->atomic_commit) |
1312 | continue; | |
935774cd BS |
1313 | |
1314 | if (new_conn_state->writeback_job && new_conn_state->writeback_job->fb) { | |
1315 | WARN_ON(connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK); | |
eca22edb | 1316 | funcs->atomic_commit(connector, old_state); |
935774cd BS |
1317 | } |
1318 | } | |
1319 | } | |
1320 | ||
623369e5 | 1321 | /** |
1af434a9 | 1322 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
1323 | * @dev: DRM device |
1324 | * @old_state: atomic state object with old state structures | |
1325 | * | |
1af434a9 DV |
1326 | * This function enables all the outputs with the new configuration which had to |
1327 | * be turned off for the update. | |
1328 | * | |
42240c90 | 1329 | * For compatibility with legacy CRTC helpers this should be called after |
1af434a9 DV |
1330 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
1331 | * does. But drivers with different needs can group the modeset commits together | |
1332 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
1333 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 1334 | */ |
1af434a9 DV |
1335 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
1336 | struct drm_atomic_state *old_state) | |
623369e5 | 1337 | { |
df63b999 | 1338 | struct drm_crtc *crtc; |
0b20a0f8 | 1339 | struct drm_crtc_state *old_crtc_state; |
415c3ac3 | 1340 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 1341 | struct drm_connector *connector; |
415c3ac3 | 1342 | struct drm_connector_state *new_conn_state; |
623369e5 DV |
1343 | int i; |
1344 | ||
0b20a0f8 | 1345 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
b5ceff20 | 1346 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
1347 | |
1348 | /* Need to filter out CRTCs where only planes change. */ | |
415c3ac3 | 1349 | if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) |
eab3bbef DV |
1350 | continue; |
1351 | ||
415c3ac3 | 1352 | if (!new_crtc_state->active) |
623369e5 DV |
1353 | continue; |
1354 | ||
1355 | funcs = crtc->helper_private; | |
1356 | ||
415c3ac3 | 1357 | if (new_crtc_state->enable) { |
fa3ab4c2 VS |
1358 | DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n", |
1359 | crtc->base.id, crtc->name); | |
0b20a0f8 | 1360 | if (funcs->atomic_enable) |
351f950d | 1361 | funcs->atomic_enable(crtc, old_state); |
fe616928 | 1362 | else if (funcs->commit) |
ee0a89cf DV |
1363 | funcs->commit(crtc); |
1364 | } | |
623369e5 DV |
1365 | } |
1366 | ||
415c3ac3 | 1367 | for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { |
b5ceff20 | 1368 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 1369 | struct drm_encoder *encoder; |
35a61fe9 | 1370 | struct drm_bridge *bridge; |
623369e5 | 1371 | |
415c3ac3 | 1372 | if (!new_conn_state->best_encoder) |
623369e5 DV |
1373 | continue; |
1374 | ||
415c3ac3 ML |
1375 | if (!new_conn_state->crtc->state->active || |
1376 | !drm_atomic_crtc_needs_modeset(new_conn_state->crtc->state)) | |
eab3bbef DV |
1377 | continue; |
1378 | ||
415c3ac3 | 1379 | encoder = new_conn_state->best_encoder; |
623369e5 DV |
1380 | funcs = encoder->helper_private; |
1381 | ||
17a38d9c DV |
1382 | DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n", |
1383 | encoder->base.id, encoder->name); | |
95d6eb3b | 1384 | |
623369e5 DV |
1385 | /* |
1386 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 1387 | * it away), so we won't call enable hooks twice. |
623369e5 | 1388 | */ |
35a61fe9 BB |
1389 | bridge = drm_bridge_chain_get_first_bridge(encoder); |
1390 | drm_atomic_bridge_chain_pre_enable(bridge, old_state); | |
623369e5 | 1391 | |
2827635e | 1392 | if (funcs) { |
43c76d72 SP |
1393 | if (funcs->atomic_enable) |
1394 | funcs->atomic_enable(encoder, old_state); | |
1395 | else if (funcs->enable) | |
2827635e NT |
1396 | funcs->enable(encoder); |
1397 | else if (funcs->commit) | |
1398 | funcs->commit(encoder); | |
1399 | } | |
623369e5 | 1400 | |
35a61fe9 | 1401 | drm_atomic_bridge_chain_enable(bridge, old_state); |
623369e5 | 1402 | } |
935774cd BS |
1403 | |
1404 | drm_atomic_helper_commit_writebacks(dev, old_state); | |
623369e5 | 1405 | } |
1af434a9 | 1406 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 1407 | |
4c5b7f3a RC |
1408 | /** |
1409 | * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state | |
1410 | * @dev: DRM device | |
1411 | * @state: atomic state object with old state structures | |
1ea0c02e DV |
1412 | * @pre_swap: If true, do an interruptible wait, and @state is the new state. |
1413 | * Otherwise @state is the old state. | |
4c5b7f3a RC |
1414 | * |
1415 | * For implicit sync, driver should fish the exclusive fence out from the | |
1416 | * incoming fb's and stash it in the drm_plane_state. This is called after | |
1417 | * drm_atomic_helper_swap_state() so it uses the current plane state (and | |
1418 | * just uses the atomic state to find the changed planes) | |
f6ce410a | 1419 | * |
1ea0c02e DV |
1420 | * Note that @pre_swap is needed since the point where we block for fences moves |
1421 | * around depending upon whether an atomic commit is blocking or | |
42590372 GP |
1422 | * non-blocking. For non-blocking commit all waiting needs to happen after |
1423 | * drm_atomic_helper_swap_state() is called, but for blocking commits we want | |
1ea0c02e DV |
1424 | * to wait **before** we do anything that can't be easily rolled back. That is |
1425 | * before we call drm_atomic_helper_swap_state(). | |
1426 | * | |
f54d1867 | 1427 | * Returns zero if success or < 0 if dma_fence_wait() fails. |
4c5b7f3a | 1428 | */ |
f6ce410a GP |
1429 | int drm_atomic_helper_wait_for_fences(struct drm_device *dev, |
1430 | struct drm_atomic_state *state, | |
1431 | bool pre_swap) | |
e2330f07 | 1432 | { |
df63b999 | 1433 | struct drm_plane *plane; |
415c3ac3 | 1434 | struct drm_plane_state *new_plane_state; |
f6ce410a | 1435 | int i, ret; |
e2330f07 | 1436 | |
415c3ac3 ML |
1437 | for_each_new_plane_in_state(state, plane, new_plane_state, i) { |
1438 | if (!new_plane_state->fence) | |
e2330f07 DV |
1439 | continue; |
1440 | ||
415c3ac3 | 1441 | WARN_ON(!new_plane_state->fb); |
f6ce410a GP |
1442 | |
1443 | /* | |
1444 | * If waiting for fences pre-swap (ie: nonblock), userspace can | |
1445 | * still interrupt the operation. Instead of blocking until the | |
1446 | * timer expires, make the wait interruptible. | |
1447 | */ | |
415c3ac3 | 1448 | ret = dma_fence_wait(new_plane_state->fence, pre_swap); |
f6ce410a GP |
1449 | if (ret) |
1450 | return ret; | |
e2330f07 | 1451 | |
415c3ac3 ML |
1452 | dma_fence_put(new_plane_state->fence); |
1453 | new_plane_state->fence = NULL; | |
e2330f07 | 1454 | } |
f6ce410a GP |
1455 | |
1456 | return 0; | |
e2330f07 | 1457 | } |
4c5b7f3a | 1458 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences); |
e2330f07 | 1459 | |
5ee3229c | 1460 | /** |
42240c90 | 1461 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on CRTCs |
5ee3229c RC |
1462 | * @dev: DRM device |
1463 | * @old_state: atomic state object with old state structures | |
1464 | * | |
dbe2d2bf | 1465 | * Helper to, after atomic commit, wait for vblanks on all affected |
42240c90 | 1466 | * CRTCs (ie. before cleaning up old framebuffers using |
01086487 | 1467 | * drm_atomic_helper_cleanup_planes()). It will only wait on CRTCs where the |
ab58e338 DV |
1468 | * framebuffers have actually changed to optimize for the legacy cursor and |
1469 | * plane update use-case. | |
01086487 BB |
1470 | * |
1471 | * Drivers using the nonblocking commit tracking support initialized by calling | |
1472 | * drm_atomic_helper_setup_commit() should look at | |
1473 | * drm_atomic_helper_wait_for_flip_done() as an alternative. | |
5ee3229c RC |
1474 | */ |
1475 | void | |
1476 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
1477 | struct drm_atomic_state *old_state) | |
623369e5 DV |
1478 | { |
1479 | struct drm_crtc *crtc; | |
415c3ac3 | 1480 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
623369e5 | 1481 | int i, ret; |
bdc57146 | 1482 | unsigned crtc_mask = 0; |
623369e5 | 1483 | |
bdc57146 ML |
1484 | /* |
1485 | * Legacy cursor ioctls are completely unsynced, and userspace | |
1486 | * relies on that (by doing tons of cursor updates). | |
1487 | */ | |
1488 | if (old_state->legacy_cursor_update) | |
1489 | return; | |
623369e5 | 1490 | |
415c3ac3 | 1491 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
a76dfe35 | 1492 | if (!new_crtc_state->active) |
ab58e338 DV |
1493 | continue; |
1494 | ||
623369e5 DV |
1495 | ret = drm_crtc_vblank_get(crtc); |
1496 | if (ret != 0) | |
1497 | continue; | |
1498 | ||
bdc57146 ML |
1499 | crtc_mask |= drm_crtc_mask(crtc); |
1500 | old_state->crtcs[i].last_vblank_count = drm_crtc_vblank_count(crtc); | |
623369e5 DV |
1501 | } |
1502 | ||
415c3ac3 | 1503 | for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
bdc57146 | 1504 | if (!(crtc_mask & drm_crtc_mask(crtc))) |
623369e5 DV |
1505 | continue; |
1506 | ||
1507 | ret = wait_event_timeout(dev->vblank[i].queue, | |
bdc57146 | 1508 | old_state->crtcs[i].last_vblank_count != |
d4853630 | 1509 | drm_crtc_vblank_count(crtc), |
b3198c38 | 1510 | msecs_to_jiffies(100)); |
623369e5 | 1511 | |
6ac7c548 RK |
1512 | WARN(!ret, "[CRTC:%d:%s] vblank wait timed out\n", |
1513 | crtc->base.id, crtc->name); | |
8d4d0d70 | 1514 | |
623369e5 DV |
1515 | drm_crtc_vblank_put(crtc); |
1516 | } | |
1517 | } | |
5ee3229c | 1518 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 | 1519 | |
01086487 BB |
1520 | /** |
1521 | * drm_atomic_helper_wait_for_flip_done - wait for all page flips to be done | |
1522 | * @dev: DRM device | |
1523 | * @old_state: atomic state object with old state structures | |
1524 | * | |
dbe2d2bf | 1525 | * Helper to, after atomic commit, wait for page flips on all affected |
01086487 BB |
1526 | * crtcs (ie. before cleaning up old framebuffers using |
1527 | * drm_atomic_helper_cleanup_planes()). Compared to | |
dbe2d2bf | 1528 | * drm_atomic_helper_wait_for_vblanks() this waits for the completion on all |
01086487 BB |
1529 | * CRTCs, assuming that cursors-only updates are signalling their completion |
1530 | * immediately (or using a different path). | |
1531 | * | |
1532 | * This requires that drivers use the nonblocking commit tracking support | |
1533 | * initialized using drm_atomic_helper_setup_commit(). | |
1534 | */ | |
1535 | void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev, | |
1536 | struct drm_atomic_state *old_state) | |
1537 | { | |
01086487 BB |
1538 | struct drm_crtc *crtc; |
1539 | int i; | |
1540 | ||
4364bcb2 LL |
1541 | for (i = 0; i < dev->mode_config.num_crtc; i++) { |
1542 | struct drm_crtc_commit *commit = old_state->crtcs[i].commit; | |
01086487 BB |
1543 | int ret; |
1544 | ||
4364bcb2 LL |
1545 | crtc = old_state->crtcs[i].ptr; |
1546 | ||
1547 | if (!crtc || !commit) | |
01086487 BB |
1548 | continue; |
1549 | ||
1550 | ret = wait_for_completion_timeout(&commit->flip_done, 10 * HZ); | |
1551 | if (ret == 0) | |
1552 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
1553 | crtc->base.id, crtc->name); | |
1554 | } | |
2de42f79 VS |
1555 | |
1556 | if (old_state->fake_commit) | |
1557 | complete_all(&old_state->fake_commit->flip_done); | |
01086487 BB |
1558 | } |
1559 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_flip_done); | |
1560 | ||
623369e5 | 1561 | /** |
9f2a7950 | 1562 | * drm_atomic_helper_commit_tail - commit atomic update to hardware |
1ea0c02e | 1563 | * @old_state: atomic state object with old state structures |
623369e5 | 1564 | * |
6806cdf9 | 1565 | * This is the default implementation for the |
81a099ac MR |
1566 | * &drm_mode_config_helper_funcs.atomic_commit_tail hook, for drivers |
1567 | * that do not support runtime_pm or do not need the CRTC to be | |
1568 | * enabled to perform a commit. Otherwise, see | |
1569 | * drm_atomic_helper_commit_tail_rpm(). | |
623369e5 | 1570 | * |
9f2a7950 | 1571 | * Note that the default ordering of how the various stages are called is to |
81a099ac | 1572 | * match the legacy modeset helper library closest. |
9f2a7950 | 1573 | */ |
1ea0c02e | 1574 | void drm_atomic_helper_commit_tail(struct drm_atomic_state *old_state) |
9f2a7950 | 1575 | { |
1ea0c02e | 1576 | struct drm_device *dev = old_state->dev; |
9f2a7950 | 1577 | |
1ea0c02e | 1578 | drm_atomic_helper_commit_modeset_disables(dev, old_state); |
9f2a7950 | 1579 | |
1ea0c02e | 1580 | drm_atomic_helper_commit_planes(dev, old_state, 0); |
9f2a7950 | 1581 | |
1ea0c02e | 1582 | drm_atomic_helper_commit_modeset_enables(dev, old_state); |
9f2a7950 | 1583 | |
6fb42b66 BB |
1584 | drm_atomic_helper_fake_vblank(old_state); |
1585 | ||
1ea0c02e | 1586 | drm_atomic_helper_commit_hw_done(old_state); |
9f2a7950 | 1587 | |
1ea0c02e | 1588 | drm_atomic_helper_wait_for_vblanks(dev, old_state); |
9f2a7950 | 1589 | |
1ea0c02e | 1590 | drm_atomic_helper_cleanup_planes(dev, old_state); |
9f2a7950 DV |
1591 | } |
1592 | EXPORT_SYMBOL(drm_atomic_helper_commit_tail); | |
1593 | ||
81a099ac MR |
1594 | /** |
1595 | * drm_atomic_helper_commit_tail_rpm - commit atomic update to hardware | |
1596 | * @old_state: new modeset state to be committed | |
1597 | * | |
1598 | * This is an alternative implementation for the | |
1599 | * &drm_mode_config_helper_funcs.atomic_commit_tail hook, for drivers | |
1600 | * that support runtime_pm or need the CRTC to be enabled to perform a | |
1601 | * commit. Otherwise, one should use the default implementation | |
1602 | * drm_atomic_helper_commit_tail(). | |
1603 | */ | |
1604 | void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_state *old_state) | |
1605 | { | |
1606 | struct drm_device *dev = old_state->dev; | |
1607 | ||
1608 | drm_atomic_helper_commit_modeset_disables(dev, old_state); | |
1609 | ||
1610 | drm_atomic_helper_commit_modeset_enables(dev, old_state); | |
1611 | ||
1612 | drm_atomic_helper_commit_planes(dev, old_state, | |
1613 | DRM_PLANE_COMMIT_ACTIVE_ONLY); | |
1614 | ||
6fb42b66 BB |
1615 | drm_atomic_helper_fake_vblank(old_state); |
1616 | ||
81a099ac MR |
1617 | drm_atomic_helper_commit_hw_done(old_state); |
1618 | ||
1619 | drm_atomic_helper_wait_for_vblanks(dev, old_state); | |
1620 | ||
1621 | drm_atomic_helper_cleanup_planes(dev, old_state); | |
1622 | } | |
1623 | EXPORT_SYMBOL(drm_atomic_helper_commit_tail_rpm); | |
1624 | ||
1ea0c02e | 1625 | static void commit_tail(struct drm_atomic_state *old_state) |
9f2a7950 | 1626 | { |
1ea0c02e | 1627 | struct drm_device *dev = old_state->dev; |
a4b10cce | 1628 | const struct drm_mode_config_helper_funcs *funcs; |
86de88cf RC |
1629 | struct drm_crtc_state *new_crtc_state; |
1630 | struct drm_crtc *crtc; | |
d4da4e33 SP |
1631 | ktime_t start; |
1632 | s64 commit_time_ms; | |
86de88cf | 1633 | unsigned int i, new_self_refresh_mask = 0; |
9f2a7950 DV |
1634 | |
1635 | funcs = dev->mode_config.helper_private; | |
1636 | ||
d4da4e33 SP |
1637 | /* |
1638 | * We're measuring the _entire_ commit, so the time will vary depending | |
1639 | * on how many fences and objects are involved. For the purposes of self | |
1640 | * refresh, this is desirable since it'll give us an idea of how | |
1641 | * congested things are. This will inform our decision on how often we | |
1642 | * should enter self refresh after idle. | |
1643 | * | |
1644 | * These times will be averaged out in the self refresh helpers to avoid | |
1645 | * overreacting over one outlier frame | |
1646 | */ | |
1647 | start = ktime_get(); | |
1648 | ||
1ea0c02e | 1649 | drm_atomic_helper_wait_for_fences(dev, old_state, false); |
9f2a7950 | 1650 | |
1ea0c02e | 1651 | drm_atomic_helper_wait_for_dependencies(old_state); |
9f2a7950 | 1652 | |
86de88cf RC |
1653 | /* |
1654 | * We cannot safely access new_crtc_state after | |
1655 | * drm_atomic_helper_commit_hw_done() so figure out which crtc's have | |
1656 | * self-refresh active beforehand: | |
1657 | */ | |
1658 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) | |
1659 | if (new_crtc_state->self_refresh_active) | |
1660 | new_self_refresh_mask |= BIT(i); | |
1661 | ||
9f2a7950 | 1662 | if (funcs && funcs->atomic_commit_tail) |
1ea0c02e | 1663 | funcs->atomic_commit_tail(old_state); |
9f2a7950 | 1664 | else |
1ea0c02e | 1665 | drm_atomic_helper_commit_tail(old_state); |
9f2a7950 | 1666 | |
d4da4e33 SP |
1667 | commit_time_ms = ktime_ms_delta(ktime_get(), start); |
1668 | if (commit_time_ms > 0) | |
1669 | drm_self_refresh_helper_update_avg_times(old_state, | |
86de88cf RC |
1670 | (unsigned long)commit_time_ms, |
1671 | new_self_refresh_mask); | |
d4da4e33 | 1672 | |
1ea0c02e | 1673 | drm_atomic_helper_commit_cleanup_done(old_state); |
9f2a7950 | 1674 | |
1ea0c02e | 1675 | drm_atomic_state_put(old_state); |
9f2a7950 DV |
1676 | } |
1677 | ||
1678 | static void commit_work(struct work_struct *work) | |
1679 | { | |
1680 | struct drm_atomic_state *state = container_of(work, | |
1681 | struct drm_atomic_state, | |
1682 | commit_work); | |
1683 | commit_tail(state); | |
1684 | } | |
1685 | ||
fef9df8b GP |
1686 | /** |
1687 | * drm_atomic_helper_async_check - check if state can be commited asynchronously | |
1688 | * @dev: DRM device | |
1689 | * @state: the driver state object | |
1690 | * | |
1691 | * This helper will check if it is possible to commit the state asynchronously. | |
1692 | * Async commits are not supposed to swap the states like normal sync commits | |
1693 | * but just do in-place changes on the current state. | |
1694 | * | |
1695 | * It will return 0 if the commit can happen in an asynchronous fashion or error | |
1696 | * if not. Note that error just mean it can't be commited asynchronously, if it | |
1697 | * fails the commit should be treated like a normal synchronous commit. | |
1698 | */ | |
1699 | int drm_atomic_helper_async_check(struct drm_device *dev, | |
1700 | struct drm_atomic_state *state) | |
1701 | { | |
1702 | struct drm_crtc *crtc; | |
1703 | struct drm_crtc_state *crtc_state; | |
de2d8db3 BB |
1704 | struct drm_plane *plane = NULL; |
1705 | struct drm_plane_state *old_plane_state = NULL; | |
1706 | struct drm_plane_state *new_plane_state = NULL; | |
fef9df8b | 1707 | const struct drm_plane_helper_funcs *funcs; |
669c9215 | 1708 | int i, n_planes = 0; |
fef9df8b GP |
1709 | |
1710 | for_each_new_crtc_in_state(state, crtc, crtc_state, i) { | |
1711 | if (drm_atomic_crtc_needs_modeset(crtc_state)) | |
1712 | return -EINVAL; | |
1713 | } | |
1714 | ||
669c9215 | 1715 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) |
fef9df8b | 1716 | n_planes++; |
fef9df8b GP |
1717 | |
1718 | /* FIXME: we support only single plane updates for now */ | |
669c9215 | 1719 | if (n_planes != 1) |
fef9df8b GP |
1720 | return -EINVAL; |
1721 | ||
603ba2df BB |
1722 | if (!new_plane_state->crtc || |
1723 | old_plane_state->crtc != new_plane_state->crtc) | |
fef9df8b GP |
1724 | return -EINVAL; |
1725 | ||
1726 | funcs = plane->helper_private; | |
1727 | if (!funcs->atomic_async_update) | |
1728 | return -EINVAL; | |
1729 | ||
669c9215 | 1730 | if (new_plane_state->fence) |
fef9df8b GP |
1731 | return -EINVAL; |
1732 | ||
1733 | /* | |
1734 | * Don't do an async update if there is an outstanding commit modifying | |
1735 | * the plane. This prevents our async update's changes from getting | |
1736 | * overridden by a previous synchronous update's state. | |
1737 | */ | |
669c9215 | 1738 | if (old_plane_state->commit && |
9073d4ed DV |
1739 | !try_wait_for_completion(&old_plane_state->commit->hw_done)) { |
1740 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] inflight previous commit preventing async commit\n", | |
1741 | plane->base.id, plane->name); | |
669c9215 | 1742 | return -EBUSY; |
9073d4ed | 1743 | } |
fef9df8b | 1744 | |
669c9215 | 1745 | return funcs->atomic_async_check(plane, new_plane_state); |
fef9df8b GP |
1746 | } |
1747 | EXPORT_SYMBOL(drm_atomic_helper_async_check); | |
1748 | ||
1749 | /** | |
1750 | * drm_atomic_helper_async_commit - commit state asynchronously | |
1751 | * @dev: DRM device | |
1752 | * @state: the driver state object | |
1753 | * | |
1754 | * This function commits a state asynchronously, i.e., not vblank | |
1755 | * synchronized. It should be used on a state only when | |
1756 | * drm_atomic_async_check() succeeds. Async commits are not supposed to swap | |
1757 | * the states like normal sync commits, but just do in-place changes on the | |
1758 | * current state. | |
89a4aac0 HK |
1759 | * |
1760 | * TODO: Implement full swap instead of doing in-place changes. | |
fef9df8b GP |
1761 | */ |
1762 | void drm_atomic_helper_async_commit(struct drm_device *dev, | |
1763 | struct drm_atomic_state *state) | |
1764 | { | |
1765 | struct drm_plane *plane; | |
1766 | struct drm_plane_state *plane_state; | |
1767 | const struct drm_plane_helper_funcs *funcs; | |
1768 | int i; | |
1769 | ||
1770 | for_each_new_plane_in_state(state, plane, plane_state, i) { | |
89a4aac0 HK |
1771 | struct drm_framebuffer *new_fb = plane_state->fb; |
1772 | struct drm_framebuffer *old_fb = plane->state->fb; | |
1773 | ||
fef9df8b GP |
1774 | funcs = plane->helper_private; |
1775 | funcs->atomic_async_update(plane, plane_state); | |
02edfd9c BB |
1776 | |
1777 | /* | |
1778 | * ->atomic_async_update() is supposed to update the | |
1779 | * plane->state in-place, make sure at least common | |
1780 | * properties have been properly updated. | |
1781 | */ | |
89a4aac0 | 1782 | WARN_ON_ONCE(plane->state->fb != new_fb); |
02edfd9c BB |
1783 | WARN_ON_ONCE(plane->state->crtc_x != plane_state->crtc_x); |
1784 | WARN_ON_ONCE(plane->state->crtc_y != plane_state->crtc_y); | |
1785 | WARN_ON_ONCE(plane->state->src_x != plane_state->src_x); | |
1786 | WARN_ON_ONCE(plane->state->src_y != plane_state->src_y); | |
89a4aac0 HK |
1787 | |
1788 | /* | |
1789 | * Make sure the FBs have been swapped so that cleanups in the | |
1790 | * new_state performs a cleanup in the old FB. | |
1791 | */ | |
1792 | WARN_ON_ONCE(plane_state->fb != old_fb); | |
fef9df8b GP |
1793 | } |
1794 | } | |
1795 | EXPORT_SYMBOL(drm_atomic_helper_async_commit); | |
1796 | ||
9f2a7950 DV |
1797 | /** |
1798 | * drm_atomic_helper_commit - commit validated state object | |
1799 | * @dev: DRM device | |
1800 | * @state: the driver state object | |
1801 | * @nonblock: whether nonblocking behavior is requested. | |
1802 | * | |
1803 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
1804 | * object. This can still fail when e.g. the framebuffer reservation fails. This | |
1805 | * function implements nonblocking commits, using | |
1806 | * drm_atomic_helper_setup_commit() and related functions. | |
1807 | * | |
9f2a7950 | 1808 | * Committing the actual hardware state is done through the |
1e55a53a | 1809 | * &drm_mode_config_helper_funcs.atomic_commit_tail callback, or its default |
6806cdf9 | 1810 | * implementation drm_atomic_helper_commit_tail(). |
6e48ae32 | 1811 | * |
c39032a8 | 1812 | * RETURNS: |
623369e5 DV |
1813 | * Zero for success or -errno. |
1814 | */ | |
1815 | int drm_atomic_helper_commit(struct drm_device *dev, | |
1816 | struct drm_atomic_state *state, | |
286dbb8d | 1817 | bool nonblock) |
623369e5 DV |
1818 | { |
1819 | int ret; | |
1820 | ||
fef9df8b GP |
1821 | if (state->async_update) { |
1822 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
1823 | if (ret) | |
1824 | return ret; | |
1825 | ||
1826 | drm_atomic_helper_async_commit(dev, state); | |
1827 | drm_atomic_helper_cleanup_planes(dev, state); | |
1828 | ||
1829 | return 0; | |
1830 | } | |
1831 | ||
a095caa7 DV |
1832 | ret = drm_atomic_helper_setup_commit(state, nonblock); |
1833 | if (ret) | |
1834 | return ret; | |
1835 | ||
9f2a7950 DV |
1836 | INIT_WORK(&state->commit_work, commit_work); |
1837 | ||
623369e5 DV |
1838 | ret = drm_atomic_helper_prepare_planes(dev, state); |
1839 | if (ret) | |
1840 | return ret; | |
1841 | ||
f6ce410a GP |
1842 | if (!nonblock) { |
1843 | ret = drm_atomic_helper_wait_for_fences(dev, state, true); | |
c066d231 ML |
1844 | if (ret) |
1845 | goto err; | |
f6ce410a GP |
1846 | } |
1847 | ||
623369e5 DV |
1848 | /* |
1849 | * This is the point of no return - everything below never fails except | |
1850 | * when the hw goes bonghits. Which means we can commit the new state on | |
1851 | * the software side now. | |
1852 | */ | |
1853 | ||
c066d231 ML |
1854 | ret = drm_atomic_helper_swap_state(state, true); |
1855 | if (ret) | |
1856 | goto err; | |
623369e5 DV |
1857 | |
1858 | /* | |
1859 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 1860 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
1861 | * that the asynchronous work has either been cancelled (if the driver |
1862 | * supports it, which at least requires that the framebuffers get | |
1863 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
1864 | * before the new state gets committed on the software side with | |
1865 | * drm_atomic_helper_swap_state(). | |
1866 | * | |
1867 | * This scheme allows new atomic state updates to be prepared and | |
1868 | * checked in parallel to the asynchronous completion of the previous | |
1869 | * update. Which is important since compositors need to figure out the | |
1870 | * composition of the next frame right after having submitted the | |
1871 | * current layout. | |
9f2a7950 DV |
1872 | * |
1873 | * NOTE: Commit work has multiple phases, first hardware commit, then | |
1874 | * cleanup. We want them to overlap, hence need system_unbound_wq to | |
a0689e34 | 1875 | * make sure work items don't artificially stall on each another. |
623369e5 DV |
1876 | */ |
1877 | ||
0853695c | 1878 | drm_atomic_state_get(state); |
9f2a7950 DV |
1879 | if (nonblock) |
1880 | queue_work(system_unbound_wq, &state->commit_work); | |
1881 | else | |
1882 | commit_tail(state); | |
623369e5 DV |
1883 | |
1884 | return 0; | |
c066d231 ML |
1885 | |
1886 | err: | |
1887 | drm_atomic_helper_cleanup_planes(dev, state); | |
1888 | return ret; | |
623369e5 DV |
1889 | } |
1890 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1891 | ||
e8c833a7 | 1892 | /** |
286dbb8d | 1893 | * DOC: implementing nonblocking commit |
e8c833a7 | 1894 | * |
0380c684 DV |
1895 | * Nonblocking atomic commits should use struct &drm_crtc_commit to sequence |
1896 | * different operations against each another. Locks, especially struct | |
1897 | * &drm_modeset_lock, should not be held in worker threads or any other | |
1898 | * asynchronous context used to commit the hardware state. | |
e8c833a7 | 1899 | * |
0380c684 DV |
1900 | * drm_atomic_helper_commit() implements the recommended sequence for |
1901 | * nonblocking commits, using drm_atomic_helper_setup_commit() internally: | |
e8c833a7 | 1902 | * |
0380c684 DV |
1903 | * 1. Run drm_atomic_helper_prepare_planes(). Since this can fail and we |
1904 | * need to propagate out of memory/VRAM errors to userspace, it must be called | |
e8c833a7 DV |
1905 | * synchronously. |
1906 | * | |
286dbb8d | 1907 | * 2. Synchronize with any outstanding nonblocking commit worker threads which |
0380c684 DV |
1908 | * might be affected by the new state update. This is handled by |
1909 | * drm_atomic_helper_setup_commit(). | |
e8c833a7 | 1910 | * |
9f2a7950 DV |
1911 | * Asynchronous workers need to have sufficient parallelism to be able to run |
1912 | * different atomic commits on different CRTCs in parallel. The simplest way to | |
a0689e34 | 1913 | * achieve this is by running them on the &system_unbound_wq work queue. Note |
9f2a7950 DV |
1914 | * that drivers are not required to split up atomic commits and run an |
1915 | * individual commit in parallel - userspace is supposed to do that if it cares. | |
1916 | * But it might be beneficial to do that for modesets, since those necessarily | |
1917 | * must be done as one global operation, and enabling or disabling a CRTC can | |
1918 | * take a long time. But even that is not required. | |
e8c833a7 | 1919 | * |
0380c684 DV |
1920 | * IMPORTANT: A &drm_atomic_state update for multiple CRTCs is sequenced |
1921 | * against all CRTCs therein. Therefore for atomic state updates which only flip | |
1922 | * planes the driver must not get the struct &drm_crtc_state of unrelated CRTCs | |
1923 | * in its atomic check code: This would prevent committing of atomic updates to | |
1924 | * multiple CRTCs in parallel. In general, adding additional state structures | |
1925 | * should be avoided as much as possible, because this reduces parallelism in | |
1926 | * (nonblocking) commits, both due to locking and due to commit sequencing | |
1927 | * requirements. | |
1928 | * | |
e8c833a7 | 1929 | * 3. The software state is updated synchronously with |
26196f7e | 1930 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
0380c684 DV |
1931 | * locks means concurrent callers never see inconsistent state. Note that commit |
1932 | * workers do not hold any locks; their access is only coordinated through | |
1933 | * ordering. If workers would access state only through the pointers in the | |
1934 | * free-standing state objects (currently not the case for any driver) then even | |
1935 | * multiple pending commits could be in-flight at the same time. | |
e8c833a7 DV |
1936 | * |
1937 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1938 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1939 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
0380c684 DV |
1940 | * being displayed. The scheduled work should synchronize against other workers |
1941 | * using the &drm_crtc_commit infrastructure as needed. See | |
1942 | * drm_atomic_helper_setup_commit() for more details. | |
e8c833a7 DV |
1943 | */ |
1944 | ||
a095caa7 DV |
1945 | static int stall_checks(struct drm_crtc *crtc, bool nonblock) |
1946 | { | |
1947 | struct drm_crtc_commit *commit, *stall_commit = NULL; | |
1948 | bool completed = true; | |
1949 | int i; | |
1950 | long ret = 0; | |
1951 | ||
1952 | spin_lock(&crtc->commit_lock); | |
1953 | i = 0; | |
1954 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) { | |
1955 | if (i == 0) { | |
1956 | completed = try_wait_for_completion(&commit->flip_done); | |
1957 | /* Userspace is not allowed to get ahead of the previous | |
1958 | * commit with nonblocking ones. */ | |
1959 | if (!completed && nonblock) { | |
1960 | spin_unlock(&crtc->commit_lock); | |
9073d4ed DV |
1961 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] busy with a previous commit\n", |
1962 | crtc->base.id, crtc->name); | |
1963 | ||
a095caa7 DV |
1964 | return -EBUSY; |
1965 | } | |
1966 | } else if (i == 1) { | |
f46640b9 | 1967 | stall_commit = drm_crtc_commit_get(commit); |
a095caa7 | 1968 | break; |
723c3e55 | 1969 | } |
a095caa7 DV |
1970 | |
1971 | i++; | |
1972 | } | |
1973 | spin_unlock(&crtc->commit_lock); | |
1974 | ||
1975 | if (!stall_commit) | |
1976 | return 0; | |
1977 | ||
1978 | /* We don't want to let commits get ahead of cleanup work too much, | |
1979 | * stalling on 2nd previous commit means triple-buffer won't ever stall. | |
1980 | */ | |
723c3e55 | 1981 | ret = wait_for_completion_interruptible_timeout(&stall_commit->cleanup_done, |
a095caa7 DV |
1982 | 10*HZ); |
1983 | if (ret == 0) | |
1984 | DRM_ERROR("[CRTC:%d:%s] cleanup_done timed out\n", | |
1985 | crtc->base.id, crtc->name); | |
1986 | ||
1987 | drm_crtc_commit_put(stall_commit); | |
1988 | ||
1989 | return ret < 0 ? ret : 0; | |
1990 | } | |
1991 | ||
899cc5f1 | 1992 | static void release_crtc_commit(struct completion *completion) |
24835e44 DV |
1993 | { |
1994 | struct drm_crtc_commit *commit = container_of(completion, | |
1995 | typeof(*commit), | |
1996 | flip_done); | |
1997 | ||
1998 | drm_crtc_commit_put(commit); | |
1999 | } | |
2000 | ||
21a01abb ML |
2001 | static void init_commit(struct drm_crtc_commit *commit, struct drm_crtc *crtc) |
2002 | { | |
2003 | init_completion(&commit->flip_done); | |
2004 | init_completion(&commit->hw_done); | |
2005 | init_completion(&commit->cleanup_done); | |
2006 | INIT_LIST_HEAD(&commit->commit_entry); | |
2007 | kref_init(&commit->ref); | |
2008 | commit->crtc = crtc; | |
2009 | } | |
2010 | ||
2011 | static struct drm_crtc_commit * | |
2012 | crtc_or_fake_commit(struct drm_atomic_state *state, struct drm_crtc *crtc) | |
2013 | { | |
2014 | if (crtc) { | |
2015 | struct drm_crtc_state *new_crtc_state; | |
2016 | ||
2017 | new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc); | |
2018 | ||
2019 | return new_crtc_state->commit; | |
2020 | } | |
2021 | ||
2022 | if (!state->fake_commit) { | |
2023 | state->fake_commit = kzalloc(sizeof(*state->fake_commit), GFP_KERNEL); | |
2024 | if (!state->fake_commit) | |
2025 | return NULL; | |
2026 | ||
2027 | init_commit(state->fake_commit, NULL); | |
2028 | } | |
2029 | ||
2030 | return state->fake_commit; | |
2031 | } | |
2032 | ||
a095caa7 DV |
2033 | /** |
2034 | * drm_atomic_helper_setup_commit - setup possibly nonblocking commit | |
2035 | * @state: new modeset state to be committed | |
2036 | * @nonblock: whether nonblocking behavior is requested. | |
2037 | * | |
2038 | * This function prepares @state to be used by the atomic helper's support for | |
2039 | * nonblocking commits. Drivers using the nonblocking commit infrastructure | |
6806cdf9 DV |
2040 | * should always call this function from their |
2041 | * &drm_mode_config_funcs.atomic_commit hook. | |
a095caa7 DV |
2042 | * |
2043 | * To be able to use this support drivers need to use a few more helper | |
2044 | * functions. drm_atomic_helper_wait_for_dependencies() must be called before | |
2045 | * actually committing the hardware state, and for nonblocking commits this call | |
2046 | * must be placed in the async worker. See also drm_atomic_helper_swap_state() | |
1e55a53a | 2047 | * and its stall parameter, for when a driver's commit hooks look at the |
6806cdf9 | 2048 | * &drm_crtc.state, &drm_plane.state or &drm_connector.state pointer directly. |
a095caa7 DV |
2049 | * |
2050 | * Completion of the hardware commit step must be signalled using | |
2051 | * drm_atomic_helper_commit_hw_done(). After this step the driver is not allowed | |
2052 | * to read or change any permanent software or hardware modeset state. The only | |
2053 | * exception is state protected by other means than &drm_modeset_lock locks. | |
2054 | * Only the free standing @state with pointers to the old state structures can | |
2055 | * be inspected, e.g. to clean up old buffers using | |
2056 | * drm_atomic_helper_cleanup_planes(). | |
2057 | * | |
2058 | * At the very end, before cleaning up @state drivers must call | |
2059 | * drm_atomic_helper_commit_cleanup_done(). | |
2060 | * | |
2061 | * This is all implemented by in drm_atomic_helper_commit(), giving drivers a | |
9ac07815 | 2062 | * complete and easy-to-use default implementation of the atomic_commit() hook. |
a095caa7 DV |
2063 | * |
2064 | * The tracking of asynchronously executed and still pending commits is done | |
2065 | * using the core structure &drm_crtc_commit. | |
2066 | * | |
2067 | * By default there's no need to clean up resources allocated by this function | |
2068 | * explicitly: drm_atomic_state_default_clear() will take care of that | |
2069 | * automatically. | |
2070 | * | |
2071 | * Returns: | |
2072 | * | |
2073 | * 0 on success. -EBUSY when userspace schedules nonblocking commits too fast, | |
2074 | * -ENOMEM on allocation failures and -EINTR when a signal is pending. | |
2075 | */ | |
2076 | int drm_atomic_helper_setup_commit(struct drm_atomic_state *state, | |
2077 | bool nonblock) | |
2078 | { | |
2079 | struct drm_crtc *crtc; | |
415c3ac3 | 2080 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
21a01abb ML |
2081 | struct drm_connector *conn; |
2082 | struct drm_connector_state *old_conn_state, *new_conn_state; | |
2083 | struct drm_plane *plane; | |
2084 | struct drm_plane_state *old_plane_state, *new_plane_state; | |
a095caa7 DV |
2085 | struct drm_crtc_commit *commit; |
2086 | int i, ret; | |
2087 | ||
415c3ac3 | 2088 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
a095caa7 DV |
2089 | commit = kzalloc(sizeof(*commit), GFP_KERNEL); |
2090 | if (!commit) | |
2091 | return -ENOMEM; | |
2092 | ||
21a01abb | 2093 | init_commit(commit, crtc); |
a095caa7 | 2094 | |
163bcc2c | 2095 | new_crtc_state->commit = commit; |
a095caa7 DV |
2096 | |
2097 | ret = stall_checks(crtc, nonblock); | |
2098 | if (ret) | |
2099 | return ret; | |
2100 | ||
2101 | /* Drivers only send out events when at least either current or | |
2102 | * new CRTC state is active. Complete right away if everything | |
2103 | * stays off. */ | |
415c3ac3 | 2104 | if (!old_crtc_state->active && !new_crtc_state->active) { |
a095caa7 DV |
2105 | complete_all(&commit->flip_done); |
2106 | continue; | |
2107 | } | |
2108 | ||
2109 | /* Legacy cursor updates are fully unsynced. */ | |
2110 | if (state->legacy_cursor_update) { | |
2111 | complete_all(&commit->flip_done); | |
2112 | continue; | |
2113 | } | |
2114 | ||
415c3ac3 | 2115 | if (!new_crtc_state->event) { |
a095caa7 DV |
2116 | commit->event = kzalloc(sizeof(*commit->event), |
2117 | GFP_KERNEL); | |
2118 | if (!commit->event) | |
2119 | return -ENOMEM; | |
2120 | ||
415c3ac3 | 2121 | new_crtc_state->event = commit->event; |
a095caa7 DV |
2122 | } |
2123 | ||
415c3ac3 ML |
2124 | new_crtc_state->event->base.completion = &commit->flip_done; |
2125 | new_crtc_state->event->base.completion_release = release_crtc_commit; | |
24835e44 | 2126 | drm_crtc_commit_get(commit); |
1c6ceeee LSL |
2127 | |
2128 | commit->abort_completion = true; | |
4364bcb2 LL |
2129 | |
2130 | state->crtcs[i].commit = commit; | |
2131 | drm_crtc_commit_get(commit); | |
a095caa7 DV |
2132 | } |
2133 | ||
21a01abb | 2134 | for_each_oldnew_connector_in_state(state, conn, old_conn_state, new_conn_state, i) { |
21a01abb ML |
2135 | /* Userspace is not allowed to get ahead of the previous |
2136 | * commit with nonblocking ones. */ | |
2137 | if (nonblock && old_conn_state->commit && | |
9073d4ed DV |
2138 | !try_wait_for_completion(&old_conn_state->commit->flip_done)) { |
2139 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] busy with a previous commit\n", | |
2140 | conn->base.id, conn->name); | |
2141 | ||
21a01abb | 2142 | return -EBUSY; |
9073d4ed | 2143 | } |
a095caa7 | 2144 | |
1f2d9bdc DV |
2145 | /* Always track connectors explicitly for e.g. link retraining. */ |
2146 | commit = crtc_or_fake_commit(state, new_conn_state->crtc ?: old_conn_state->crtc); | |
21a01abb ML |
2147 | if (!commit) |
2148 | return -ENOMEM; | |
a095caa7 | 2149 | |
21a01abb ML |
2150 | new_conn_state->commit = drm_crtc_commit_get(commit); |
2151 | } | |
2152 | ||
2153 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { | |
21a01abb ML |
2154 | /* Userspace is not allowed to get ahead of the previous |
2155 | * commit with nonblocking ones. */ | |
2156 | if (nonblock && old_plane_state->commit && | |
9073d4ed DV |
2157 | !try_wait_for_completion(&old_plane_state->commit->flip_done)) { |
2158 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] busy with a previous commit\n", | |
2159 | plane->base.id, plane->name); | |
2160 | ||
21a01abb | 2161 | return -EBUSY; |
9073d4ed | 2162 | } |
21a01abb | 2163 | |
1f2d9bdc | 2164 | /* Always track planes explicitly for async pageflip support. */ |
4edd6084 | 2165 | commit = crtc_or_fake_commit(state, new_plane_state->crtc ?: old_plane_state->crtc); |
21a01abb ML |
2166 | if (!commit) |
2167 | return -ENOMEM; | |
2168 | ||
2169 | new_plane_state->commit = drm_crtc_commit_get(commit); | |
a095caa7 DV |
2170 | } |
2171 | ||
a095caa7 | 2172 | return 0; |
a095caa7 | 2173 | } |
a095caa7 | 2174 | EXPORT_SYMBOL(drm_atomic_helper_setup_commit); |
a095caa7 DV |
2175 | |
2176 | /** | |
2177 | * drm_atomic_helper_wait_for_dependencies - wait for required preceeding commits | |
1ea0c02e | 2178 | * @old_state: atomic state object with old state structures |
a095caa7 DV |
2179 | * |
2180 | * This function waits for all preceeding commits that touch the same CRTC as | |
1ea0c02e | 2181 | * @old_state to both be committed to the hardware (as signalled by |
0380c684 | 2182 | * drm_atomic_helper_commit_hw_done()) and executed by the hardware (as signalled |
277b09cf | 2183 | * by calling drm_crtc_send_vblank_event() on the &drm_crtc_state.event). |
a095caa7 DV |
2184 | * |
2185 | * This is part of the atomic helper support for nonblocking commits, see | |
2186 | * drm_atomic_helper_setup_commit() for an overview. | |
2187 | */ | |
1ea0c02e | 2188 | void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *old_state) |
a095caa7 DV |
2189 | { |
2190 | struct drm_crtc *crtc; | |
163bcc2c | 2191 | struct drm_crtc_state *old_crtc_state; |
21a01abb ML |
2192 | struct drm_plane *plane; |
2193 | struct drm_plane_state *old_plane_state; | |
2194 | struct drm_connector *conn; | |
2195 | struct drm_connector_state *old_conn_state; | |
a095caa7 DV |
2196 | struct drm_crtc_commit *commit; |
2197 | int i; | |
2198 | long ret; | |
2199 | ||
163bcc2c ML |
2200 | for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
2201 | commit = old_crtc_state->commit; | |
a095caa7 DV |
2202 | |
2203 | if (!commit) | |
2204 | continue; | |
2205 | ||
2206 | ret = wait_for_completion_timeout(&commit->hw_done, | |
2207 | 10*HZ); | |
2208 | if (ret == 0) | |
2209 | DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n", | |
2210 | crtc->base.id, crtc->name); | |
2211 | ||
2212 | /* Currently no support for overwriting flips, hence | |
2213 | * stall for previous one to execute completely. */ | |
2214 | ret = wait_for_completion_timeout(&commit->flip_done, | |
2215 | 10*HZ); | |
2216 | if (ret == 0) | |
2217 | DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n", | |
2218 | crtc->base.id, crtc->name); | |
a095caa7 | 2219 | } |
21a01abb ML |
2220 | |
2221 | for_each_old_connector_in_state(old_state, conn, old_conn_state, i) { | |
2222 | commit = old_conn_state->commit; | |
a095caa7 | 2223 | |
21a01abb ML |
2224 | if (!commit) |
2225 | continue; | |
2226 | ||
2227 | ret = wait_for_completion_timeout(&commit->hw_done, | |
2228 | 10*HZ); | |
2229 | if (ret == 0) | |
2230 | DRM_ERROR("[CONNECTOR:%d:%s] hw_done timed out\n", | |
2231 | conn->base.id, conn->name); | |
2232 | ||
2233 | /* Currently no support for overwriting flips, hence | |
2234 | * stall for previous one to execute completely. */ | |
2235 | ret = wait_for_completion_timeout(&commit->flip_done, | |
2236 | 10*HZ); | |
2237 | if (ret == 0) | |
2238 | DRM_ERROR("[CONNECTOR:%d:%s] flip_done timed out\n", | |
2239 | conn->base.id, conn->name); | |
2240 | } | |
2241 | ||
2242 | for_each_old_plane_in_state(old_state, plane, old_plane_state, i) { | |
2243 | commit = old_plane_state->commit; | |
2244 | ||
2245 | if (!commit) | |
2246 | continue; | |
2247 | ||
2248 | ret = wait_for_completion_timeout(&commit->hw_done, | |
2249 | 10*HZ); | |
2250 | if (ret == 0) | |
2251 | DRM_ERROR("[PLANE:%d:%s] hw_done timed out\n", | |
2252 | plane->base.id, plane->name); | |
2253 | ||
2254 | /* Currently no support for overwriting flips, hence | |
2255 | * stall for previous one to execute completely. */ | |
2256 | ret = wait_for_completion_timeout(&commit->flip_done, | |
2257 | 10*HZ); | |
2258 | if (ret == 0) | |
2259 | DRM_ERROR("[PLANE:%d:%s] flip_done timed out\n", | |
2260 | plane->base.id, plane->name); | |
a095caa7 DV |
2261 | } |
2262 | } | |
2263 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies); | |
2264 | ||
b25c60af BB |
2265 | /** |
2266 | * drm_atomic_helper_fake_vblank - fake VBLANK events if needed | |
2267 | * @old_state: atomic state object with old state structures | |
2268 | * | |
dbe2d2bf | 2269 | * This function walks all CRTCs and fakes VBLANK events on those with |
b25c60af BB |
2270 | * &drm_crtc_state.no_vblank set to true and &drm_crtc_state.event != NULL. |
2271 | * The primary use of this function is writeback connectors working in oneshot | |
2272 | * mode and faking VBLANK events. In this case they only fake the VBLANK event | |
2273 | * when a job is queued, and any change to the pipeline that does not touch the | |
2274 | * connector is leading to timeouts when calling | |
2275 | * drm_atomic_helper_wait_for_vblanks() or | |
7beb691f TZ |
2276 | * drm_atomic_helper_wait_for_flip_done(). In addition to writeback |
2277 | * connectors, this function can also fake VBLANK events for CRTCs without | |
2278 | * VBLANK interrupt. | |
b25c60af BB |
2279 | * |
2280 | * This is part of the atomic helper support for nonblocking commits, see | |
2281 | * drm_atomic_helper_setup_commit() for an overview. | |
2282 | */ | |
2283 | void drm_atomic_helper_fake_vblank(struct drm_atomic_state *old_state) | |
2284 | { | |
2285 | struct drm_crtc_state *new_crtc_state; | |
2286 | struct drm_crtc *crtc; | |
2287 | int i; | |
2288 | ||
2289 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { | |
2290 | unsigned long flags; | |
2291 | ||
2292 | if (!new_crtc_state->no_vblank) | |
2293 | continue; | |
2294 | ||
2295 | spin_lock_irqsave(&old_state->dev->event_lock, flags); | |
2296 | if (new_crtc_state->event) { | |
2297 | drm_crtc_send_vblank_event(crtc, | |
2298 | new_crtc_state->event); | |
2299 | new_crtc_state->event = NULL; | |
2300 | } | |
2301 | spin_unlock_irqrestore(&old_state->dev->event_lock, flags); | |
2302 | } | |
2303 | } | |
2304 | EXPORT_SYMBOL(drm_atomic_helper_fake_vblank); | |
2305 | ||
a095caa7 DV |
2306 | /** |
2307 | * drm_atomic_helper_commit_hw_done - setup possible nonblocking commit | |
1ea0c02e | 2308 | * @old_state: atomic state object with old state structures |
a095caa7 DV |
2309 | * |
2310 | * This function is used to signal completion of the hardware commit step. After | |
2311 | * this step the driver is not allowed to read or change any permanent software | |
2312 | * or hardware modeset state. The only exception is state protected by other | |
2313 | * means than &drm_modeset_lock locks. | |
2314 | * | |
2315 | * Drivers should try to postpone any expensive or delayed cleanup work after | |
2316 | * this function is called. | |
2317 | * | |
2318 | * This is part of the atomic helper support for nonblocking commits, see | |
2319 | * drm_atomic_helper_setup_commit() for an overview. | |
2320 | */ | |
1ea0c02e | 2321 | void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *old_state) |
a095caa7 DV |
2322 | { |
2323 | struct drm_crtc *crtc; | |
163bcc2c | 2324 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
a095caa7 DV |
2325 | struct drm_crtc_commit *commit; |
2326 | int i; | |
2327 | ||
163bcc2c ML |
2328 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
2329 | commit = new_crtc_state->commit; | |
a095caa7 DV |
2330 | if (!commit) |
2331 | continue; | |
2332 | ||
163bcc2c ML |
2333 | /* |
2334 | * copy new_crtc_state->commit to old_crtc_state->commit, | |
2335 | * it's unsafe to touch new_crtc_state after hw_done, | |
2336 | * but we still need to do so in cleanup_done(). | |
2337 | */ | |
2338 | if (old_crtc_state->commit) | |
2339 | drm_crtc_commit_put(old_crtc_state->commit); | |
2340 | ||
2341 | old_crtc_state->commit = drm_crtc_commit_get(commit); | |
2342 | ||
a095caa7 | 2343 | /* backend must have consumed any event by now */ |
415c3ac3 | 2344 | WARN_ON(new_crtc_state->event); |
a095caa7 | 2345 | complete_all(&commit->hw_done); |
a095caa7 | 2346 | } |
21a01abb ML |
2347 | |
2348 | if (old_state->fake_commit) { | |
2349 | complete_all(&old_state->fake_commit->hw_done); | |
2350 | complete_all(&old_state->fake_commit->flip_done); | |
2351 | } | |
a095caa7 DV |
2352 | } |
2353 | EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done); | |
2354 | ||
2355 | /** | |
2356 | * drm_atomic_helper_commit_cleanup_done - signal completion of commit | |
1ea0c02e | 2357 | * @old_state: atomic state object with old state structures |
a095caa7 | 2358 | * |
1ea0c02e DV |
2359 | * This signals completion of the atomic update @old_state, including any |
2360 | * cleanup work. If used, it must be called right before calling | |
0853695c | 2361 | * drm_atomic_state_put(). |
a095caa7 DV |
2362 | * |
2363 | * This is part of the atomic helper support for nonblocking commits, see | |
2364 | * drm_atomic_helper_setup_commit() for an overview. | |
2365 | */ | |
1ea0c02e | 2366 | void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *old_state) |
a095caa7 DV |
2367 | { |
2368 | struct drm_crtc *crtc; | |
163bcc2c | 2369 | struct drm_crtc_state *old_crtc_state; |
a095caa7 DV |
2370 | struct drm_crtc_commit *commit; |
2371 | int i; | |
a095caa7 | 2372 | |
163bcc2c ML |
2373 | for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
2374 | commit = old_crtc_state->commit; | |
a095caa7 DV |
2375 | if (WARN_ON(!commit)) |
2376 | continue; | |
2377 | ||
a095caa7 DV |
2378 | complete_all(&commit->cleanup_done); |
2379 | WARN_ON(!try_wait_for_completion(&commit->hw_done)); | |
2380 | ||
7141fd3e | 2381 | spin_lock(&crtc->commit_lock); |
a095caa7 DV |
2382 | list_del(&commit->commit_entry); |
2383 | spin_unlock(&crtc->commit_lock); | |
2384 | } | |
21a01abb | 2385 | |
10a599fa | 2386 | if (old_state->fake_commit) { |
21a01abb | 2387 | complete_all(&old_state->fake_commit->cleanup_done); |
10a599fa VS |
2388 | WARN_ON(!try_wait_for_completion(&old_state->fake_commit->hw_done)); |
2389 | } | |
a095caa7 DV |
2390 | } |
2391 | EXPORT_SYMBOL(drm_atomic_helper_commit_cleanup_done); | |
2392 | ||
c2fcd274 | 2393 | /** |
2e3afd47 | 2394 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 2395 | * @dev: DRM device |
2e3afd47 | 2396 | * @state: atomic state object with new state structures |
c2fcd274 DV |
2397 | * |
2398 | * This function prepares plane state, specifically framebuffers, for the new | |
6806cdf9 DV |
2399 | * configuration, by calling &drm_plane_helper_funcs.prepare_fb. If any failure |
2400 | * is encountered this function will call &drm_plane_helper_funcs.cleanup_fb on | |
2401 | * any already successfully prepared framebuffer. | |
c2fcd274 DV |
2402 | * |
2403 | * Returns: | |
2404 | * 0 on success, negative error code on failure. | |
2405 | */ | |
2406 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
2407 | struct drm_atomic_state *state) | |
2408 | { | |
9d2230dc LP |
2409 | struct drm_connector *connector; |
2410 | struct drm_connector_state *new_conn_state; | |
be9174a4 | 2411 | struct drm_plane *plane; |
415c3ac3 | 2412 | struct drm_plane_state *new_plane_state; |
be9174a4 | 2413 | int ret, i, j; |
c2fcd274 | 2414 | |
9d2230dc LP |
2415 | for_each_new_connector_in_state(state, connector, new_conn_state, i) { |
2416 | if (!new_conn_state->writeback_job) | |
2417 | continue; | |
2418 | ||
2419 | ret = drm_writeback_prepare_job(new_conn_state->writeback_job); | |
2420 | if (ret < 0) | |
2421 | return ret; | |
2422 | } | |
2423 | ||
415c3ac3 | 2424 | for_each_new_plane_in_state(state, plane, new_plane_state, i) { |
b5ceff20 | 2425 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
2426 | |
2427 | funcs = plane->helper_private; | |
2428 | ||
844f9111 | 2429 | if (funcs->prepare_fb) { |
415c3ac3 | 2430 | ret = funcs->prepare_fb(plane, new_plane_state); |
c2fcd274 DV |
2431 | if (ret) |
2432 | goto fail; | |
2433 | } | |
2434 | } | |
2435 | ||
2436 | return 0; | |
2437 | ||
2438 | fail: | |
415c3ac3 | 2439 | for_each_new_plane_in_state(state, plane, new_plane_state, j) { |
b5ceff20 | 2440 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 2441 | |
be9174a4 | 2442 | if (j >= i) |
c2fcd274 DV |
2443 | continue; |
2444 | ||
2445 | funcs = plane->helper_private; | |
2446 | ||
844f9111 | 2447 | if (funcs->cleanup_fb) |
415c3ac3 | 2448 | funcs->cleanup_fb(plane, new_plane_state); |
c2fcd274 DV |
2449 | } |
2450 | ||
2451 | return ret; | |
2452 | } | |
2453 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
2454 | ||
7135ac54 | 2455 | static bool plane_crtc_active(const struct drm_plane_state *state) |
aef9dbb8 DV |
2456 | { |
2457 | return state->crtc && state->crtc->state->active; | |
2458 | } | |
2459 | ||
c2fcd274 DV |
2460 | /** |
2461 | * drm_atomic_helper_commit_planes - commit plane state | |
2462 | * @dev: DRM device | |
b0fcfc89 | 2463 | * @old_state: atomic state object with old state structures |
2b58e98d | 2464 | * @flags: flags for committing plane state |
c2fcd274 DV |
2465 | * |
2466 | * This function commits the new plane state using the plane and atomic helper | |
42240c90 | 2467 | * functions for planes and CRTCs. It assumes that the atomic state has already |
c2fcd274 DV |
2468 | * been pushed into the relevant object state pointers, since this step can no |
2469 | * longer fail. | |
2470 | * | |
b0fcfc89 | 2471 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 | 2472 | * crtcs need to be updated though. |
de28d021 ML |
2473 | * |
2474 | * Note that this function does all plane updates across all CRTCs in one step. | |
2475 | * If the hardware can't support this approach look at | |
2476 | * drm_atomic_helper_commit_planes_on_crtc() instead. | |
6e48ae32 DV |
2477 | * |
2478 | * Plane parameters can be updated by applications while the associated CRTC is | |
2479 | * disabled. The DRM/KMS core will store the parameters in the plane state, | |
2480 | * which will be available to the driver when the CRTC is turned on. As a result | |
2481 | * most drivers don't need to be immediately notified of plane updates for a | |
2482 | * disabled CRTC. | |
2483 | * | |
2b58e98d LY |
2484 | * Unless otherwise needed, drivers are advised to set the ACTIVE_ONLY flag in |
2485 | * @flags in order not to receive plane update notifications related to a | |
2486 | * disabled CRTC. This avoids the need to manually ignore plane updates in | |
6e48ae32 DV |
2487 | * driver code when the driver and/or hardware can't or just don't need to deal |
2488 | * with updates on disabled CRTCs, for example when supporting runtime PM. | |
2489 | * | |
2b58e98d LY |
2490 | * Drivers may set the NO_DISABLE_AFTER_MODESET flag in @flags if the relevant |
2491 | * display controllers require to disable a CRTC's planes when the CRTC is | |
6806cdf9 DV |
2492 | * disabled. This function would skip the &drm_plane_helper_funcs.atomic_disable |
2493 | * call for a plane if the CRTC of the old plane state needs a modesetting | |
2494 | * operation. Of course, the drivers need to disable the planes in their CRTC | |
2495 | * disable callbacks since no one else would do that. | |
2b58e98d LY |
2496 | * |
2497 | * The drm_atomic_helper_commit() default implementation doesn't set the | |
2498 | * ACTIVE_ONLY flag to most closely match the behaviour of the legacy helpers. | |
2499 | * This should not be copied blindly by drivers. | |
c2fcd274 DV |
2500 | */ |
2501 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
aef9dbb8 | 2502 | struct drm_atomic_state *old_state, |
2b58e98d | 2503 | uint32_t flags) |
c2fcd274 | 2504 | { |
df63b999 | 2505 | struct drm_crtc *crtc; |
415c3ac3 | 2506 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
df63b999 | 2507 | struct drm_plane *plane; |
415c3ac3 | 2508 | struct drm_plane_state *old_plane_state, *new_plane_state; |
c2fcd274 | 2509 | int i; |
2b58e98d LY |
2510 | bool active_only = flags & DRM_PLANE_COMMIT_ACTIVE_ONLY; |
2511 | bool no_disable = flags & DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET; | |
c2fcd274 | 2512 | |
415c3ac3 | 2513 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
b5ceff20 | 2514 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
2515 | |
2516 | funcs = crtc->helper_private; | |
2517 | ||
2518 | if (!funcs || !funcs->atomic_begin) | |
2519 | continue; | |
2520 | ||
415c3ac3 | 2521 | if (active_only && !new_crtc_state->active) |
aef9dbb8 DV |
2522 | continue; |
2523 | ||
f6ebe9f9 | 2524 | funcs->atomic_begin(crtc, old_state); |
c2fcd274 DV |
2525 | } |
2526 | ||
415c3ac3 | 2527 | for_each_oldnew_plane_in_state(old_state, plane, old_plane_state, new_plane_state, i) { |
b5ceff20 | 2528 | const struct drm_plane_helper_funcs *funcs; |
216c59d6 | 2529 | bool disabling; |
c2fcd274 DV |
2530 | |
2531 | funcs = plane->helper_private; | |
2532 | ||
3cad4b68 | 2533 | if (!funcs) |
c2fcd274 DV |
2534 | continue; |
2535 | ||
51ffa12d ML |
2536 | disabling = drm_atomic_plane_disabling(old_plane_state, |
2537 | new_plane_state); | |
216c59d6 LP |
2538 | |
2539 | if (active_only) { | |
2540 | /* | |
2541 | * Skip planes related to inactive CRTCs. If the plane | |
2542 | * is enabled use the state of the current CRTC. If the | |
2543 | * plane is being disabled use the state of the old | |
2544 | * CRTC to avoid skipping planes being disabled on an | |
2545 | * active CRTC. | |
2546 | */ | |
415c3ac3 | 2547 | if (!disabling && !plane_crtc_active(new_plane_state)) |
216c59d6 LP |
2548 | continue; |
2549 | if (disabling && !plane_crtc_active(old_plane_state)) | |
2550 | continue; | |
2551 | } | |
aef9dbb8 | 2552 | |
407b8bd9 TR |
2553 | /* |
2554 | * Special-case disabling the plane if drivers support it. | |
2555 | */ | |
2b58e98d LY |
2556 | if (disabling && funcs->atomic_disable) { |
2557 | struct drm_crtc_state *crtc_state; | |
2558 | ||
2559 | crtc_state = old_plane_state->crtc->state; | |
2560 | ||
2561 | if (drm_atomic_crtc_needs_modeset(crtc_state) && | |
2562 | no_disable) | |
2563 | continue; | |
2564 | ||
407b8bd9 | 2565 | funcs->atomic_disable(plane, old_plane_state); |
415c3ac3 | 2566 | } else if (new_plane_state->crtc || disabling) { |
407b8bd9 | 2567 | funcs->atomic_update(plane, old_plane_state); |
2b58e98d | 2568 | } |
c2fcd274 DV |
2569 | } |
2570 | ||
415c3ac3 | 2571 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
b5ceff20 | 2572 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
2573 | |
2574 | funcs = crtc->helper_private; | |
2575 | ||
2576 | if (!funcs || !funcs->atomic_flush) | |
2577 | continue; | |
2578 | ||
415c3ac3 | 2579 | if (active_only && !new_crtc_state->active) |
aef9dbb8 DV |
2580 | continue; |
2581 | ||
f6ebe9f9 | 2582 | funcs->atomic_flush(crtc, old_state); |
c2fcd274 DV |
2583 | } |
2584 | } | |
2585 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
2586 | ||
de28d021 | 2587 | /** |
42240c90 TR |
2588 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a CRTC |
2589 | * @old_crtc_state: atomic state object with the old CRTC state | |
de28d021 ML |
2590 | * |
2591 | * This function commits the new plane state using the plane and atomic helper | |
42240c90 | 2592 | * functions for planes on the specific CRTC. It assumes that the atomic state |
de28d021 ML |
2593 | * has already been pushed into the relevant object state pointers, since this |
2594 | * step can no longer fail. | |
2595 | * | |
42240c90 | 2596 | * This function is useful when plane updates should be done CRTC-by-CRTC |
de28d021 ML |
2597 | * instead of one global step like drm_atomic_helper_commit_planes() does. |
2598 | * | |
2599 | * This function can only be savely used when planes are not allowed to move | |
2600 | * between different CRTCs because this function doesn't handle inter-CRTC | |
2601 | * depencies. Callers need to ensure that either no such depencies exist, | |
2602 | * resolve them through ordering of commit calls or through some other means. | |
2603 | */ | |
2604 | void | |
2605 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) | |
2606 | { | |
2607 | const struct drm_crtc_helper_funcs *crtc_funcs; | |
2608 | struct drm_crtc *crtc = old_crtc_state->crtc; | |
2609 | struct drm_atomic_state *old_state = old_crtc_state->state; | |
e35a2f9a VS |
2610 | struct drm_crtc_state *new_crtc_state = |
2611 | drm_atomic_get_new_crtc_state(old_state, crtc); | |
de28d021 ML |
2612 | struct drm_plane *plane; |
2613 | unsigned plane_mask; | |
2614 | ||
2615 | plane_mask = old_crtc_state->plane_mask; | |
e35a2f9a | 2616 | plane_mask |= new_crtc_state->plane_mask; |
de28d021 ML |
2617 | |
2618 | crtc_funcs = crtc->helper_private; | |
2619 | if (crtc_funcs && crtc_funcs->atomic_begin) | |
f6ebe9f9 | 2620 | crtc_funcs->atomic_begin(crtc, old_state); |
de28d021 ML |
2621 | |
2622 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { | |
2623 | struct drm_plane_state *old_plane_state = | |
b4d93679 | 2624 | drm_atomic_get_old_plane_state(old_state, plane); |
e35a2f9a VS |
2625 | struct drm_plane_state *new_plane_state = |
2626 | drm_atomic_get_new_plane_state(old_state, plane); | |
de28d021 ML |
2627 | const struct drm_plane_helper_funcs *plane_funcs; |
2628 | ||
2629 | plane_funcs = plane->helper_private; | |
2630 | ||
2631 | if (!old_plane_state || !plane_funcs) | |
2632 | continue; | |
2633 | ||
e35a2f9a VS |
2634 | WARN_ON(new_plane_state->crtc && |
2635 | new_plane_state->crtc != crtc); | |
de28d021 | 2636 | |
e35a2f9a | 2637 | if (drm_atomic_plane_disabling(old_plane_state, new_plane_state) && |
de28d021 ML |
2638 | plane_funcs->atomic_disable) |
2639 | plane_funcs->atomic_disable(plane, old_plane_state); | |
e35a2f9a VS |
2640 | else if (new_plane_state->crtc || |
2641 | drm_atomic_plane_disabling(old_plane_state, new_plane_state)) | |
de28d021 ML |
2642 | plane_funcs->atomic_update(plane, old_plane_state); |
2643 | } | |
2644 | ||
2645 | if (crtc_funcs && crtc_funcs->atomic_flush) | |
f6ebe9f9 | 2646 | crtc_funcs->atomic_flush(crtc, old_state); |
de28d021 ML |
2647 | } |
2648 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); | |
2649 | ||
6753ba97 JS |
2650 | /** |
2651 | * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes | |
28500291 | 2652 | * @old_crtc_state: atomic state object with the old CRTC state |
6753ba97 JS |
2653 | * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks |
2654 | * | |
2655 | * Disables all planes associated with the given CRTC. This can be | |
28500291 LY |
2656 | * used for instance in the CRTC helper atomic_disable callback to disable |
2657 | * all planes. | |
6753ba97 JS |
2658 | * |
2659 | * If the atomic-parameter is set the function calls the CRTC's | |
2660 | * atomic_begin hook before and atomic_flush hook after disabling the | |
2661 | * planes. | |
2662 | * | |
2663 | * It is a bug to call this function without having implemented the | |
6806cdf9 | 2664 | * &drm_plane_helper_funcs.atomic_disable plane hook. |
6753ba97 | 2665 | */ |
28500291 LY |
2666 | void |
2667 | drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state, | |
2668 | bool atomic) | |
6753ba97 | 2669 | { |
28500291 | 2670 | struct drm_crtc *crtc = old_crtc_state->crtc; |
6753ba97 JS |
2671 | const struct drm_crtc_helper_funcs *crtc_funcs = |
2672 | crtc->helper_private; | |
2673 | struct drm_plane *plane; | |
2674 | ||
2675 | if (atomic && crtc_funcs && crtc_funcs->atomic_begin) | |
2676 | crtc_funcs->atomic_begin(crtc, NULL); | |
2677 | ||
28500291 | 2678 | drm_atomic_crtc_state_for_each_plane(plane, old_crtc_state) { |
6753ba97 JS |
2679 | const struct drm_plane_helper_funcs *plane_funcs = |
2680 | plane->helper_private; | |
2681 | ||
28500291 | 2682 | if (!plane_funcs) |
6753ba97 JS |
2683 | continue; |
2684 | ||
2685 | WARN_ON(!plane_funcs->atomic_disable); | |
2686 | if (plane_funcs->atomic_disable) | |
2687 | plane_funcs->atomic_disable(plane, NULL); | |
2688 | } | |
2689 | ||
2690 | if (atomic && crtc_funcs && crtc_funcs->atomic_flush) | |
2691 | crtc_funcs->atomic_flush(crtc, NULL); | |
2692 | } | |
2693 | EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); | |
2694 | ||
c2fcd274 DV |
2695 | /** |
2696 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
2697 | * @dev: DRM device | |
2698 | * @old_state: atomic state object with old state structures | |
2699 | * | |
2700 | * This function cleans up plane state, specifically framebuffers, from the old | |
2701 | * configuration. Hence the old configuration must be perserved in @old_state to | |
2702 | * be able to call this function. | |
2703 | * | |
2704 | * This function must also be called on the new state when the atomic update | |
2705 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
2706 | */ | |
2707 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
2708 | struct drm_atomic_state *old_state) | |
2709 | { | |
df63b999 | 2710 | struct drm_plane *plane; |
415c3ac3 | 2711 | struct drm_plane_state *old_plane_state, *new_plane_state; |
c2fcd274 DV |
2712 | int i; |
2713 | ||
415c3ac3 | 2714 | for_each_oldnew_plane_in_state(old_state, plane, old_plane_state, new_plane_state, i) { |
b5ceff20 | 2715 | const struct drm_plane_helper_funcs *funcs; |
415c3ac3 ML |
2716 | struct drm_plane_state *plane_state; |
2717 | ||
2718 | /* | |
2719 | * This might be called before swapping when commit is aborted, | |
2720 | * in which case we have to cleanup the new state. | |
2721 | */ | |
2722 | if (old_plane_state == plane->state) | |
2723 | plane_state = new_plane_state; | |
2724 | else | |
2725 | plane_state = old_plane_state; | |
c2fcd274 | 2726 | |
c2fcd274 DV |
2727 | funcs = plane->helper_private; |
2728 | ||
844f9111 ML |
2729 | if (funcs->cleanup_fb) |
2730 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
2731 | } |
2732 | } | |
2733 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
2734 | ||
2735 | /** | |
2736 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
c2fcd274 | 2737 | * @state: atomic state |
c066d231 | 2738 | * @stall: stall for preceeding commits |
c2fcd274 DV |
2739 | * |
2740 | * This function stores the atomic state into the current state pointers in all | |
2741 | * driver objects. It should be called after all failing steps have been done | |
2742 | * and succeeded, but before the actual hardware state is committed. | |
2743 | * | |
2744 | * For cleanup and error recovery the current state for all changed objects will | |
c066d231 | 2745 | * be swapped into @state. |
c2fcd274 DV |
2746 | * |
2747 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
2748 | * | |
2749 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
2750 | * | |
2751 | * 2. Do any other steps that might fail. | |
2752 | * | |
2753 | * 3. Put the staged state into the current state pointers with this function. | |
2754 | * | |
2755 | * 4. Actually commit the hardware state. | |
2756 | * | |
26196f7e | 2757 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
c2fcd274 | 2758 | * contains the old state. Also do any other cleanup required with that state. |
a095caa7 DV |
2759 | * |
2760 | * @stall must be set when nonblocking commits for this driver directly access | |
6806cdf9 DV |
2761 | * the &drm_plane.state, &drm_crtc.state or &drm_connector.state pointer. With |
2762 | * the current atomic helpers this is almost always the case, since the helpers | |
a095caa7 | 2763 | * don't pass the right state structures to the callbacks. |
c066d231 ML |
2764 | * |
2765 | * Returns: | |
2766 | * | |
c4bbb735 ML |
2767 | * Returns 0 on success. Can return -ERESTARTSYS when @stall is true and the |
2768 | * waiting for the previous commits has been interrupted. | |
c2fcd274 | 2769 | */ |
c066d231 | 2770 | int drm_atomic_helper_swap_state(struct drm_atomic_state *state, |
5e84c269 | 2771 | bool stall) |
c2fcd274 | 2772 | { |
c4bbb735 | 2773 | int i, ret; |
be9174a4 | 2774 | struct drm_connector *connector; |
415c3ac3 | 2775 | struct drm_connector_state *old_conn_state, *new_conn_state; |
be9174a4 | 2776 | struct drm_crtc *crtc; |
415c3ac3 | 2777 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
be9174a4 | 2778 | struct drm_plane *plane; |
415c3ac3 | 2779 | struct drm_plane_state *old_plane_state, *new_plane_state; |
a095caa7 | 2780 | struct drm_crtc_commit *commit; |
a4370c77 VS |
2781 | struct drm_private_obj *obj; |
2782 | struct drm_private_state *old_obj_state, *new_obj_state; | |
a095caa7 DV |
2783 | |
2784 | if (stall) { | |
21a01abb ML |
2785 | /* |
2786 | * We have to stall for hw_done here before | |
2787 | * drm_atomic_helper_wait_for_dependencies() because flip | |
2788 | * depth > 1 is not yet supported by all drivers. As long as | |
2789 | * obj->state is directly dereferenced anywhere in the drivers | |
2790 | * atomic_commit_tail function, then it's unsafe to swap state | |
2791 | * before drm_atomic_helper_commit_hw_done() is called. | |
2792 | */ | |
2793 | ||
163bcc2c ML |
2794 | for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) { |
2795 | commit = old_crtc_state->commit; | |
a095caa7 DV |
2796 | |
2797 | if (!commit) | |
2798 | continue; | |
2799 | ||
c4bbb735 | 2800 | ret = wait_for_completion_interruptible(&commit->hw_done); |
c4bbb735 ML |
2801 | if (ret) |
2802 | return ret; | |
a095caa7 | 2803 | } |
21a01abb ML |
2804 | |
2805 | for_each_old_connector_in_state(state, connector, old_conn_state, i) { | |
2806 | commit = old_conn_state->commit; | |
a095caa7 DV |
2807 | |
2808 | if (!commit) | |
2809 | continue; | |
2810 | ||
c4bbb735 | 2811 | ret = wait_for_completion_interruptible(&commit->hw_done); |
21a01abb ML |
2812 | if (ret) |
2813 | return ret; | |
2814 | } | |
c4bbb735 | 2815 | |
21a01abb ML |
2816 | for_each_old_plane_in_state(state, plane, old_plane_state, i) { |
2817 | commit = old_plane_state->commit; | |
2818 | ||
2819 | if (!commit) | |
2820 | continue; | |
2821 | ||
2822 | ret = wait_for_completion_interruptible(&commit->hw_done); | |
c4bbb735 ML |
2823 | if (ret) |
2824 | return ret; | |
a095caa7 DV |
2825 | } |
2826 | } | |
c2fcd274 | 2827 | |
415c3ac3 | 2828 | for_each_oldnew_connector_in_state(state, connector, old_conn_state, new_conn_state, i) { |
581e49fe ML |
2829 | WARN_ON(connector->state != old_conn_state); |
2830 | ||
415c3ac3 ML |
2831 | old_conn_state->state = state; |
2832 | new_conn_state->state = NULL; | |
2833 | ||
2834 | state->connectors[i].state = old_conn_state; | |
2835 | connector->state = new_conn_state; | |
c2fcd274 DV |
2836 | } |
2837 | ||
415c3ac3 | 2838 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
581e49fe ML |
2839 | WARN_ON(crtc->state != old_crtc_state); |
2840 | ||
415c3ac3 ML |
2841 | old_crtc_state->state = state; |
2842 | new_crtc_state->state = NULL; | |
2843 | ||
2844 | state->crtcs[i].state = old_crtc_state; | |
2845 | crtc->state = new_crtc_state; | |
a095caa7 | 2846 | |
163bcc2c | 2847 | if (new_crtc_state->commit) { |
a095caa7 | 2848 | spin_lock(&crtc->commit_lock); |
163bcc2c | 2849 | list_add(&new_crtc_state->commit->commit_entry, |
a095caa7 DV |
2850 | &crtc->commit_list); |
2851 | spin_unlock(&crtc->commit_lock); | |
2852 | ||
163bcc2c | 2853 | new_crtc_state->commit->event = NULL; |
a095caa7 | 2854 | } |
c2fcd274 DV |
2855 | } |
2856 | ||
415c3ac3 | 2857 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { |
581e49fe ML |
2858 | WARN_ON(plane->state != old_plane_state); |
2859 | ||
415c3ac3 ML |
2860 | old_plane_state->state = state; |
2861 | new_plane_state->state = NULL; | |
2862 | ||
2863 | state->planes[i].state = old_plane_state; | |
2864 | plane->state = new_plane_state; | |
c2fcd274 | 2865 | } |
b430c27a | 2866 | |
a4370c77 VS |
2867 | for_each_oldnew_private_obj_in_state(state, obj, old_obj_state, new_obj_state, i) { |
2868 | WARN_ON(obj->state != old_obj_state); | |
2869 | ||
2870 | old_obj_state->state = state; | |
2871 | new_obj_state->state = NULL; | |
2872 | ||
2873 | state->private_objs[i].state = old_obj_state; | |
2874 | obj->state = new_obj_state; | |
2875 | } | |
c066d231 ML |
2876 | |
2877 | return 0; | |
c2fcd274 DV |
2878 | } |
2879 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
2880 | |
2881 | /** | |
2882 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
2883 | * @plane: plane object to update | |
2884 | * @crtc: owning CRTC of owning plane | |
2885 | * @fb: framebuffer to flip onto plane | |
42240c90 TR |
2886 | * @crtc_x: x offset of primary plane on @crtc |
2887 | * @crtc_y: y offset of primary plane on @crtc | |
2888 | * @crtc_w: width of primary plane rectangle on @crtc | |
2889 | * @crtc_h: height of primary plane rectangle on @crtc | |
042652ed DV |
2890 | * @src_x: x offset of @fb for panning |
2891 | * @src_y: y offset of @fb for panning | |
2892 | * @src_w: width of source rectangle in @fb | |
2893 | * @src_h: height of source rectangle in @fb | |
34a2ab5e | 2894 | * @ctx: lock acquire context |
042652ed DV |
2895 | * |
2896 | * Provides a default plane update handler using the atomic driver interface. | |
2897 | * | |
2898 | * RETURNS: | |
2899 | * Zero on success, error code on failure | |
2900 | */ | |
2901 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
2902 | struct drm_crtc *crtc, | |
2903 | struct drm_framebuffer *fb, | |
2904 | int crtc_x, int crtc_y, | |
2905 | unsigned int crtc_w, unsigned int crtc_h, | |
2906 | uint32_t src_x, uint32_t src_y, | |
34a2ab5e DV |
2907 | uint32_t src_w, uint32_t src_h, |
2908 | struct drm_modeset_acquire_ctx *ctx) | |
042652ed DV |
2909 | { |
2910 | struct drm_atomic_state *state; | |
2911 | struct drm_plane_state *plane_state; | |
2912 | int ret = 0; | |
2913 | ||
2914 | state = drm_atomic_state_alloc(plane->dev); | |
2915 | if (!state) | |
2916 | return -ENOMEM; | |
2917 | ||
d26f96c7 | 2918 | state->acquire_ctx = ctx; |
042652ed DV |
2919 | plane_state = drm_atomic_get_plane_state(state, plane); |
2920 | if (IS_ERR(plane_state)) { | |
2921 | ret = PTR_ERR(plane_state); | |
2922 | goto fail; | |
2923 | } | |
2924 | ||
07cc0ef6 | 2925 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
2926 | if (ret != 0) |
2927 | goto fail; | |
321ebf04 | 2928 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
2929 | plane_state->crtc_x = crtc_x; |
2930 | plane_state->crtc_y = crtc_y; | |
042652ed | 2931 | plane_state->crtc_w = crtc_w; |
02e6f379 | 2932 | plane_state->crtc_h = crtc_h; |
042652ed DV |
2933 | plane_state->src_x = src_x; |
2934 | plane_state->src_y = src_y; | |
042652ed | 2935 | plane_state->src_w = src_w; |
02e6f379 | 2936 | plane_state->src_h = src_h; |
042652ed | 2937 | |
3671c580 DV |
2938 | if (plane == crtc->cursor) |
2939 | state->legacy_cursor_update = true; | |
2940 | ||
042652ed | 2941 | ret = drm_atomic_commit(state); |
042652ed | 2942 | fail: |
0853695c | 2943 | drm_atomic_state_put(state); |
042652ed | 2944 | return ret; |
042652ed DV |
2945 | } |
2946 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
2947 | ||
2948 | /** | |
2949 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
2950 | * @plane: plane to disable | |
19315294 | 2951 | * @ctx: lock acquire context |
042652ed DV |
2952 | * |
2953 | * Provides a default plane disable handler using the atomic driver interface. | |
2954 | * | |
2955 | * RETURNS: | |
2956 | * Zero on success, error code on failure | |
2957 | */ | |
19315294 DV |
2958 | int drm_atomic_helper_disable_plane(struct drm_plane *plane, |
2959 | struct drm_modeset_acquire_ctx *ctx) | |
042652ed DV |
2960 | { |
2961 | struct drm_atomic_state *state; | |
2962 | struct drm_plane_state *plane_state; | |
2963 | int ret = 0; | |
2964 | ||
2965 | state = drm_atomic_state_alloc(plane->dev); | |
2966 | if (!state) | |
2967 | return -ENOMEM; | |
2968 | ||
d26f96c7 | 2969 | state->acquire_ctx = ctx; |
042652ed DV |
2970 | plane_state = drm_atomic_get_plane_state(state, plane); |
2971 | if (IS_ERR(plane_state)) { | |
2972 | ret = PTR_ERR(plane_state); | |
2973 | goto fail; | |
2974 | } | |
2975 | ||
a36c027d | 2976 | if (plane_state->crtc && plane_state->crtc->cursor == plane) |
24e79d0d ML |
2977 | plane_state->state->legacy_cursor_update = true; |
2978 | ||
bbb1e524 | 2979 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
042652ed DV |
2980 | if (ret != 0) |
2981 | goto fail; | |
f02ad907 | 2982 | |
042652ed | 2983 | ret = drm_atomic_commit(state); |
042652ed | 2984 | fail: |
0853695c | 2985 | drm_atomic_state_put(state); |
042652ed | 2986 | return ret; |
042652ed DV |
2987 | } |
2988 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
2989 | ||
042652ed DV |
2990 | /** |
2991 | * drm_atomic_helper_set_config - set a new config from userspace | |
2992 | * @set: mode set configuration | |
a4eff9aa | 2993 | * @ctx: lock acquisition context |
042652ed | 2994 | * |
42240c90 | 2995 | * Provides a default CRTC set_config handler using the atomic driver interface. |
042652ed | 2996 | * |
40ee6fbe MN |
2997 | * NOTE: For backwards compatibility with old userspace this automatically |
2998 | * resets the "link-status" property to GOOD, to force any link | |
2999 | * re-training. The SETCRTC ioctl does not define whether an update does | |
3000 | * need a full modeset or just a plane update, hence we're allowed to do | |
97e14fbe | 3001 | * that. See also drm_connector_set_link_status_property(). |
40ee6fbe | 3002 | * |
042652ed DV |
3003 | * Returns: |
3004 | * Returns 0 on success, negative errno numbers on failure. | |
3005 | */ | |
a4eff9aa DV |
3006 | int drm_atomic_helper_set_config(struct drm_mode_set *set, |
3007 | struct drm_modeset_acquire_ctx *ctx) | |
042652ed DV |
3008 | { |
3009 | struct drm_atomic_state *state; | |
3010 | struct drm_crtc *crtc = set->crtc; | |
042652ed DV |
3011 | int ret = 0; |
3012 | ||
3013 | state = drm_atomic_state_alloc(crtc->dev); | |
3014 | if (!state) | |
3015 | return -ENOMEM; | |
3016 | ||
38b6441e | 3017 | state->acquire_ctx = ctx; |
bbb1e524 RC |
3018 | ret = __drm_atomic_helper_set_config(set, state); |
3019 | if (ret != 0) | |
1fa4da04 | 3020 | goto fail; |
042652ed | 3021 | |
44596b8c ML |
3022 | ret = handle_conflicting_encoders(state, true); |
3023 | if (ret) | |
43b67309 | 3024 | goto fail; |
44596b8c | 3025 | |
bbb1e524 | 3026 | ret = drm_atomic_commit(state); |
bbb1e524 | 3027 | |
1fa4da04 | 3028 | fail: |
0853695c | 3029 | drm_atomic_state_put(state); |
bbb1e524 | 3030 | return ret; |
bbb1e524 RC |
3031 | } |
3032 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
3033 | ||
37406a60 SP |
3034 | /** |
3035 | * drm_atomic_helper_disable_all - disable all currently active outputs | |
3036 | * @dev: DRM device | |
3037 | * @ctx: lock acquisition context | |
3038 | * | |
3039 | * Loops through all connectors, finding those that aren't turned off and then | |
3040 | * turns them off by setting their DPMS mode to OFF and deactivating the CRTC | |
3041 | * that they are connected to. | |
3042 | * | |
3043 | * This is used for example in suspend/resume to disable all currently active | |
3044 | * functions when suspending. If you just want to shut down everything at e.g. | |
3045 | * driver unload, look at drm_atomic_helper_shutdown(). | |
3046 | * | |
3047 | * Note that if callers haven't already acquired all modeset locks this might | |
3048 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
3049 | * | |
3050 | * Returns: | |
3051 | * 0 on success or a negative error code on failure. | |
3052 | * | |
3053 | * See also: | |
3054 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() and | |
3055 | * drm_atomic_helper_shutdown(). | |
3056 | */ | |
3057 | int drm_atomic_helper_disable_all(struct drm_device *dev, | |
3058 | struct drm_modeset_acquire_ctx *ctx) | |
14942760 TR |
3059 | { |
3060 | struct drm_atomic_state *state; | |
9b2104f4 | 3061 | struct drm_connector_state *conn_state; |
14942760 | 3062 | struct drm_connector *conn; |
9b2104f4 ML |
3063 | struct drm_plane_state *plane_state; |
3064 | struct drm_plane *plane; | |
3065 | struct drm_crtc_state *crtc_state; | |
3066 | struct drm_crtc *crtc; | |
3067 | int ret, i; | |
14942760 TR |
3068 | |
3069 | state = drm_atomic_state_alloc(dev); | |
3070 | if (!state) | |
3071 | return -ENOMEM; | |
3072 | ||
3073 | state->acquire_ctx = ctx; | |
3074 | ||
9b2104f4 | 3075 | drm_for_each_crtc(crtc, dev) { |
14942760 TR |
3076 | crtc_state = drm_atomic_get_crtc_state(state, crtc); |
3077 | if (IS_ERR(crtc_state)) { | |
9b2104f4 | 3078 | ret = PTR_ERR(crtc_state); |
14942760 TR |
3079 | goto free; |
3080 | } | |
3081 | ||
3082 | crtc_state->active = false; | |
9b2104f4 ML |
3083 | |
3084 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, NULL); | |
3085 | if (ret < 0) | |
3086 | goto free; | |
3087 | ||
3088 | ret = drm_atomic_add_affected_planes(state, crtc); | |
3089 | if (ret < 0) | |
3090 | goto free; | |
3091 | ||
3092 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
3093 | if (ret < 0) | |
3094 | goto free; | |
3095 | } | |
3096 | ||
dfb8bb3b | 3097 | for_each_new_connector_in_state(state, conn, conn_state, i) { |
9b2104f4 ML |
3098 | ret = drm_atomic_set_crtc_for_connector(conn_state, NULL); |
3099 | if (ret < 0) | |
3100 | goto free; | |
3101 | } | |
3102 | ||
dfb8bb3b | 3103 | for_each_new_plane_in_state(state, plane, plane_state, i) { |
9b2104f4 ML |
3104 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); |
3105 | if (ret < 0) | |
3106 | goto free; | |
3107 | ||
3108 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
14942760 TR |
3109 | } |
3110 | ||
9b2104f4 | 3111 | ret = drm_atomic_commit(state); |
14942760 | 3112 | free: |
0853695c | 3113 | drm_atomic_state_put(state); |
9b2104f4 | 3114 | return ret; |
14942760 TR |
3115 | } |
3116 | EXPORT_SYMBOL(drm_atomic_helper_disable_all); | |
3117 | ||
18dddadc DV |
3118 | /** |
3119 | * drm_atomic_helper_shutdown - shutdown all CRTC | |
3120 | * @dev: DRM device | |
3121 | * | |
3122 | * This shuts down all CRTC, which is useful for driver unloading. Shutdown on | |
3123 | * suspend should instead be handled with drm_atomic_helper_suspend(), since | |
3124 | * that also takes a snapshot of the modeset state to be restored on resume. | |
3125 | * | |
3126 | * This is just a convenience wrapper around drm_atomic_helper_disable_all(), | |
3127 | * and it is the atomic version of drm_crtc_force_disable_all(). | |
3128 | */ | |
3129 | void drm_atomic_helper_shutdown(struct drm_device *dev) | |
3130 | { | |
3131 | struct drm_modeset_acquire_ctx ctx; | |
3132 | int ret; | |
3133 | ||
b7ea04d2 | 3134 | DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret); |
18dddadc | 3135 | |
37406a60 | 3136 | ret = drm_atomic_helper_disable_all(dev, &ctx); |
18dddadc DV |
3137 | if (ret) |
3138 | DRM_ERROR("Disabling all crtc's during unload failed with %i\n", ret); | |
3139 | ||
77ef3857 | 3140 | DRM_MODESET_LOCK_ALL_END(dev, ctx, ret); |
18dddadc DV |
3141 | } |
3142 | EXPORT_SYMBOL(drm_atomic_helper_shutdown); | |
3143 | ||
1d8224e7 DV |
3144 | /** |
3145 | * drm_atomic_helper_duplicate_state - duplicate an atomic state object | |
3146 | * @dev: DRM device | |
3147 | * @ctx: lock acquisition context | |
3148 | * | |
3149 | * Makes a copy of the current atomic state by looping over all objects and | |
3150 | * duplicating their respective states. This is used for example by suspend/ | |
3151 | * resume support code to save the state prior to suspend such that it can | |
3152 | * be restored upon resume. | |
3153 | * | |
3154 | * Note that this treats atomic state as persistent between save and restore. | |
3155 | * Drivers must make sure that this is possible and won't result in confusion | |
3156 | * or erroneous behaviour. | |
3157 | * | |
3158 | * Note that if callers haven't already acquired all modeset locks this might | |
3159 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
3160 | * | |
3161 | * Returns: | |
3162 | * A pointer to the copy of the atomic state object on success or an | |
3163 | * ERR_PTR()-encoded error code on failure. | |
3164 | * | |
3165 | * See also: | |
3166 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
3167 | */ | |
3168 | struct drm_atomic_state * | |
3169 | drm_atomic_helper_duplicate_state(struct drm_device *dev, | |
3170 | struct drm_modeset_acquire_ctx *ctx) | |
3171 | { | |
3172 | struct drm_atomic_state *state; | |
3173 | struct drm_connector *conn; | |
3174 | struct drm_connector_list_iter conn_iter; | |
3175 | struct drm_plane *plane; | |
3176 | struct drm_crtc *crtc; | |
3177 | int err = 0; | |
3178 | ||
3179 | state = drm_atomic_state_alloc(dev); | |
3180 | if (!state) | |
3181 | return ERR_PTR(-ENOMEM); | |
3182 | ||
3183 | state->acquire_ctx = ctx; | |
022debad | 3184 | state->duplicated = true; |
1d8224e7 DV |
3185 | |
3186 | drm_for_each_crtc(crtc, dev) { | |
3187 | struct drm_crtc_state *crtc_state; | |
3188 | ||
3189 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3190 | if (IS_ERR(crtc_state)) { | |
3191 | err = PTR_ERR(crtc_state); | |
3192 | goto free; | |
3193 | } | |
3194 | } | |
3195 | ||
3196 | drm_for_each_plane(plane, dev) { | |
3197 | struct drm_plane_state *plane_state; | |
3198 | ||
3199 | plane_state = drm_atomic_get_plane_state(state, plane); | |
3200 | if (IS_ERR(plane_state)) { | |
3201 | err = PTR_ERR(plane_state); | |
3202 | goto free; | |
3203 | } | |
3204 | } | |
3205 | ||
3206 | drm_connector_list_iter_begin(dev, &conn_iter); | |
3207 | drm_for_each_connector_iter(conn, &conn_iter) { | |
3208 | struct drm_connector_state *conn_state; | |
3209 | ||
3210 | conn_state = drm_atomic_get_connector_state(state, conn); | |
3211 | if (IS_ERR(conn_state)) { | |
3212 | err = PTR_ERR(conn_state); | |
3213 | drm_connector_list_iter_end(&conn_iter); | |
3214 | goto free; | |
3215 | } | |
3216 | } | |
3217 | drm_connector_list_iter_end(&conn_iter); | |
3218 | ||
3219 | /* clear the acquire context so that it isn't accidentally reused */ | |
3220 | state->acquire_ctx = NULL; | |
3221 | ||
3222 | free: | |
3223 | if (err < 0) { | |
3224 | drm_atomic_state_put(state); | |
3225 | state = ERR_PTR(err); | |
3226 | } | |
3227 | ||
3228 | return state; | |
3229 | } | |
3230 | EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); | |
3231 | ||
14942760 TR |
3232 | /** |
3233 | * drm_atomic_helper_suspend - subsystem-level suspend helper | |
3234 | * @dev: DRM device | |
3235 | * | |
3236 | * Duplicates the current atomic state, disables all active outputs and then | |
3237 | * returns a pointer to the original atomic state to the caller. Drivers can | |
3238 | * pass this pointer to the drm_atomic_helper_resume() helper upon resume to | |
3239 | * restore the output configuration that was active at the time the system | |
3240 | * entered suspend. | |
3241 | * | |
3242 | * Note that it is potentially unsafe to use this. The atomic state object | |
3243 | * returned by this function is assumed to be persistent. Drivers must ensure | |
3244 | * that this holds true. Before calling this function, drivers must make sure | |
3245 | * to suspend fbdev emulation so that nothing can be using the device. | |
3246 | * | |
3247 | * Returns: | |
3248 | * A pointer to a copy of the state before suspend on success or an ERR_PTR()- | |
3249 | * encoded error code on failure. Drivers should store the returned atomic | |
3250 | * state object and pass it to the drm_atomic_helper_resume() helper upon | |
3251 | * resume. | |
3252 | * | |
3253 | * See also: | |
3254 | * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), | |
581e49fe | 3255 | * drm_atomic_helper_resume(), drm_atomic_helper_commit_duplicated_state() |
14942760 TR |
3256 | */ |
3257 | struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) | |
3258 | { | |
3259 | struct drm_modeset_acquire_ctx ctx; | |
3260 | struct drm_atomic_state *state; | |
3261 | int err; | |
3262 | ||
615aa3d9 SP |
3263 | /* This can never be returned, but it makes the compiler happy */ |
3264 | state = ERR_PTR(-EINVAL); | |
14942760 | 3265 | |
b7ea04d2 | 3266 | DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err); |
14942760 TR |
3267 | |
3268 | state = drm_atomic_helper_duplicate_state(dev, &ctx); | |
3269 | if (IS_ERR(state)) | |
3270 | goto unlock; | |
3271 | ||
3272 | err = drm_atomic_helper_disable_all(dev, &ctx); | |
3273 | if (err < 0) { | |
0853695c | 3274 | drm_atomic_state_put(state); |
14942760 TR |
3275 | state = ERR_PTR(err); |
3276 | goto unlock; | |
3277 | } | |
3278 | ||
3279 | unlock: | |
77ef3857 | 3280 | DRM_MODESET_LOCK_ALL_END(dev, ctx, err); |
b7ea04d2 SP |
3281 | if (err) |
3282 | return ERR_PTR(err); | |
14942760 | 3283 | |
14942760 TR |
3284 | return state; |
3285 | } | |
3286 | EXPORT_SYMBOL(drm_atomic_helper_suspend); | |
3287 | ||
581e49fe ML |
3288 | /** |
3289 | * drm_atomic_helper_commit_duplicated_state - commit duplicated state | |
3290 | * @state: duplicated atomic state to commit | |
3291 | * @ctx: pointer to acquire_ctx to use for commit. | |
3292 | * | |
3293 | * The state returned by drm_atomic_helper_duplicate_state() and | |
3294 | * drm_atomic_helper_suspend() is partially invalid, and needs to | |
3295 | * be fixed up before commit. | |
3296 | * | |
3297 | * Returns: | |
3298 | * 0 on success or a negative error code on failure. | |
3299 | * | |
3300 | * See also: | |
3301 | * drm_atomic_helper_suspend() | |
3302 | */ | |
3303 | int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state, | |
3304 | struct drm_modeset_acquire_ctx *ctx) | |
3305 | { | |
aa394b0d | 3306 | int i, ret; |
581e49fe | 3307 | struct drm_plane *plane; |
415c3ac3 | 3308 | struct drm_plane_state *new_plane_state; |
581e49fe | 3309 | struct drm_connector *connector; |
415c3ac3 | 3310 | struct drm_connector_state *new_conn_state; |
581e49fe | 3311 | struct drm_crtc *crtc; |
415c3ac3 | 3312 | struct drm_crtc_state *new_crtc_state; |
581e49fe ML |
3313 | |
3314 | state->acquire_ctx = ctx; | |
3315 | ||
e00fb856 | 3316 | for_each_new_plane_in_state(state, plane, new_plane_state, i) |
581e49fe ML |
3317 | state->planes[i].old_state = plane->state; |
3318 | ||
415c3ac3 | 3319 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) |
581e49fe ML |
3320 | state->crtcs[i].old_state = crtc->state; |
3321 | ||
415c3ac3 | 3322 | for_each_new_connector_in_state(state, connector, new_conn_state, i) |
581e49fe ML |
3323 | state->connectors[i].old_state = connector->state; |
3324 | ||
aa394b0d SP |
3325 | ret = drm_atomic_commit(state); |
3326 | ||
3327 | state->acquire_ctx = NULL; | |
3328 | ||
3329 | return ret; | |
581e49fe ML |
3330 | } |
3331 | EXPORT_SYMBOL(drm_atomic_helper_commit_duplicated_state); | |
3332 | ||
14942760 TR |
3333 | /** |
3334 | * drm_atomic_helper_resume - subsystem-level resume helper | |
3335 | * @dev: DRM device | |
3336 | * @state: atomic state to resume to | |
3337 | * | |
3338 | * Calls drm_mode_config_reset() to synchronize hardware and software states, | |
3339 | * grabs all modeset locks and commits the atomic state object. This can be | |
3340 | * used in conjunction with the drm_atomic_helper_suspend() helper to | |
3341 | * implement suspend/resume for drivers that support atomic mode-setting. | |
3342 | * | |
3343 | * Returns: | |
3344 | * 0 on success or a negative error code on failure. | |
3345 | * | |
3346 | * See also: | |
3347 | * drm_atomic_helper_suspend() | |
3348 | */ | |
3349 | int drm_atomic_helper_resume(struct drm_device *dev, | |
3350 | struct drm_atomic_state *state) | |
3351 | { | |
a5b8444e | 3352 | struct drm_modeset_acquire_ctx ctx; |
14942760 TR |
3353 | int err; |
3354 | ||
3355 | drm_mode_config_reset(dev); | |
581e49fe | 3356 | |
b7ea04d2 | 3357 | DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err); |
869e188a | 3358 | |
b7ea04d2 | 3359 | err = drm_atomic_helper_commit_duplicated_state(state, &ctx); |
a5b8444e | 3360 | |
77ef3857 | 3361 | DRM_MODESET_LOCK_ALL_END(dev, ctx, err); |
6d281b1f | 3362 | drm_atomic_state_put(state); |
14942760 TR |
3363 | |
3364 | return err; | |
3365 | } | |
3366 | EXPORT_SYMBOL(drm_atomic_helper_resume); | |
3367 | ||
8c3a8181 DV |
3368 | static int page_flip_common(struct drm_atomic_state *state, |
3369 | struct drm_crtc *crtc, | |
3370 | struct drm_framebuffer *fb, | |
3371 | struct drm_pending_vblank_event *event, | |
3372 | uint32_t flags) | |
f869a6ec AG |
3373 | { |
3374 | struct drm_plane *plane = crtc->primary; | |
3375 | struct drm_plane_state *plane_state; | |
3376 | struct drm_crtc_state *crtc_state; | |
3377 | int ret = 0; | |
3378 | ||
3379 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3380 | if (IS_ERR(crtc_state)) | |
3381 | return PTR_ERR(crtc_state); | |
3382 | ||
3383 | crtc_state->event = event; | |
4d85f45c | 3384 | crtc_state->async_flip = flags & DRM_MODE_PAGE_FLIP_ASYNC; |
f869a6ec AG |
3385 | |
3386 | plane_state = drm_atomic_get_plane_state(state, plane); | |
3387 | if (IS_ERR(plane_state)) | |
3388 | return PTR_ERR(plane_state); | |
3389 | ||
f869a6ec AG |
3390 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
3391 | if (ret != 0) | |
3392 | return ret; | |
3393 | drm_atomic_set_fb_for_plane(plane_state, fb); | |
3394 | ||
3395 | /* Make sure we don't accidentally do a full modeset. */ | |
3396 | state->allow_modeset = false; | |
3397 | if (!crtc_state->active) { | |
6ac7c548 RK |
3398 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled, rejecting legacy flip\n", |
3399 | crtc->base.id, crtc->name); | |
f869a6ec AG |
3400 | return -EINVAL; |
3401 | } | |
3402 | ||
3403 | return ret; | |
3404 | } | |
3405 | ||
8bc0f312 DV |
3406 | /** |
3407 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
42240c90 | 3408 | * @crtc: DRM CRTC |
8bc0f312 DV |
3409 | * @fb: DRM framebuffer |
3410 | * @event: optional DRM event to signal upon completion | |
3411 | * @flags: flip flags for non-vblank sync'ed updates | |
41292b1f | 3412 | * @ctx: lock acquisition context |
8bc0f312 | 3413 | * |
f869a6ec AG |
3414 | * Provides a default &drm_crtc_funcs.page_flip implementation |
3415 | * using the atomic driver interface. | |
8bc0f312 | 3416 | * |
8bc0f312 DV |
3417 | * Returns: |
3418 | * Returns 0 on success, negative errno numbers on failure. | |
f869a6ec AG |
3419 | * |
3420 | * See also: | |
3421 | * drm_atomic_helper_page_flip_target() | |
8bc0f312 DV |
3422 | */ |
3423 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
3424 | struct drm_framebuffer *fb, | |
3425 | struct drm_pending_vblank_event *event, | |
41292b1f DV |
3426 | uint32_t flags, |
3427 | struct drm_modeset_acquire_ctx *ctx) | |
8bc0f312 DV |
3428 | { |
3429 | struct drm_plane *plane = crtc->primary; | |
3430 | struct drm_atomic_state *state; | |
8bc0f312 DV |
3431 | int ret = 0; |
3432 | ||
8bc0f312 DV |
3433 | state = drm_atomic_state_alloc(plane->dev); |
3434 | if (!state) | |
3435 | return -ENOMEM; | |
3436 | ||
043e7fb6 | 3437 | state->acquire_ctx = ctx; |
f869a6ec | 3438 | |
6cbe5c46 | 3439 | ret = page_flip_common(state, crtc, fb, event, flags); |
f869a6ec | 3440 | if (ret != 0) |
8bc0f312 | 3441 | goto fail; |
8bc0f312 | 3442 | |
f869a6ec | 3443 | ret = drm_atomic_nonblocking_commit(state); |
f869a6ec | 3444 | fail: |
f869a6ec AG |
3445 | drm_atomic_state_put(state); |
3446 | return ret; | |
f869a6ec AG |
3447 | } |
3448 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
3449 | ||
3450 | /** | |
3451 | * drm_atomic_helper_page_flip_target - do page flip on target vblank period. | |
42240c90 | 3452 | * @crtc: DRM CRTC |
f869a6ec AG |
3453 | * @fb: DRM framebuffer |
3454 | * @event: optional DRM event to signal upon completion | |
3455 | * @flags: flip flags for non-vblank sync'ed updates | |
3456 | * @target: specifying the target vblank period when the flip to take effect | |
41292b1f | 3457 | * @ctx: lock acquisition context |
f869a6ec AG |
3458 | * |
3459 | * Provides a default &drm_crtc_funcs.page_flip_target implementation. | |
3460 | * Similar to drm_atomic_helper_page_flip() with extra parameter to specify | |
3461 | * target vblank period to flip. | |
3462 | * | |
3463 | * Returns: | |
3464 | * Returns 0 on success, negative errno numbers on failure. | |
3465 | */ | |
8c3a8181 DV |
3466 | int drm_atomic_helper_page_flip_target(struct drm_crtc *crtc, |
3467 | struct drm_framebuffer *fb, | |
3468 | struct drm_pending_vblank_event *event, | |
3469 | uint32_t flags, | |
3470 | uint32_t target, | |
3471 | struct drm_modeset_acquire_ctx *ctx) | |
f869a6ec AG |
3472 | { |
3473 | struct drm_plane *plane = crtc->primary; | |
3474 | struct drm_atomic_state *state; | |
3475 | struct drm_crtc_state *crtc_state; | |
3476 | int ret = 0; | |
3477 | ||
f869a6ec AG |
3478 | state = drm_atomic_state_alloc(plane->dev); |
3479 | if (!state) | |
3480 | return -ENOMEM; | |
3481 | ||
043e7fb6 | 3482 | state->acquire_ctx = ctx; |
f869a6ec | 3483 | |
6cbe5c46 | 3484 | ret = page_flip_common(state, crtc, fb, event, flags); |
8bc0f312 DV |
3485 | if (ret != 0) |
3486 | goto fail; | |
8bc0f312 | 3487 | |
b4d93679 | 3488 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); |
f869a6ec | 3489 | if (WARN_ON(!crtc_state)) { |
4cba6850 DV |
3490 | ret = -EINVAL; |
3491 | goto fail; | |
3492 | } | |
f869a6ec | 3493 | crtc_state->target_vblank = target; |
4cba6850 | 3494 | |
b837ba0a | 3495 | ret = drm_atomic_nonblocking_commit(state); |
8bc0f312 | 3496 | fail: |
0853695c | 3497 | drm_atomic_state_put(state); |
8bc0f312 | 3498 | return ret; |
8bc0f312 | 3499 | } |
f869a6ec | 3500 | EXPORT_SYMBOL(drm_atomic_helper_page_flip_target); |
1d8224e7 DV |
3501 | |
3502 | /** | |
3503 | * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table | |
3504 | * @crtc: CRTC object | |
3505 | * @red: red correction table | |
3506 | * @green: green correction table | |
3507 | * @blue: green correction table | |
3508 | * @size: size of the tables | |
3509 | * @ctx: lock acquire context | |
3510 | * | |
3511 | * Implements support for legacy gamma correction table for drivers | |
3512 | * that support color management through the DEGAMMA_LUT/GAMMA_LUT | |
3513 | * properties. See drm_crtc_enable_color_mgmt() and the containing chapter for | |
3514 | * how the atomic color management and gamma tables work. | |
3515 | */ | |
3516 | int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc, | |
3517 | u16 *red, u16 *green, u16 *blue, | |
3518 | uint32_t size, | |
3519 | struct drm_modeset_acquire_ctx *ctx) | |
3520 | { | |
3521 | struct drm_device *dev = crtc->dev; | |
3522 | struct drm_atomic_state *state; | |
3523 | struct drm_crtc_state *crtc_state; | |
3524 | struct drm_property_blob *blob = NULL; | |
3525 | struct drm_color_lut *blob_data; | |
3526 | int i, ret = 0; | |
3527 | bool replaced; | |
3528 | ||
3529 | state = drm_atomic_state_alloc(crtc->dev); | |
3530 | if (!state) | |
3531 | return -ENOMEM; | |
3532 | ||
3533 | blob = drm_property_create_blob(dev, | |
3534 | sizeof(struct drm_color_lut) * size, | |
3535 | NULL); | |
3536 | if (IS_ERR(blob)) { | |
3537 | ret = PTR_ERR(blob); | |
3538 | blob = NULL; | |
3539 | goto fail; | |
3540 | } | |
3541 | ||
3542 | /* Prepare GAMMA_LUT with the legacy values. */ | |
3543 | blob_data = blob->data; | |
3544 | for (i = 0; i < size; i++) { | |
3545 | blob_data[i].red = red[i]; | |
3546 | blob_data[i].green = green[i]; | |
3547 | blob_data[i].blue = blue[i]; | |
3548 | } | |
3549 | ||
3550 | state->acquire_ctx = ctx; | |
3551 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3552 | if (IS_ERR(crtc_state)) { | |
3553 | ret = PTR_ERR(crtc_state); | |
3554 | goto fail; | |
3555 | } | |
3556 | ||
3557 | /* Reset DEGAMMA_LUT and CTM properties. */ | |
3558 | replaced = drm_property_replace_blob(&crtc_state->degamma_lut, NULL); | |
3559 | replaced |= drm_property_replace_blob(&crtc_state->ctm, NULL); | |
3560 | replaced |= drm_property_replace_blob(&crtc_state->gamma_lut, blob); | |
3561 | crtc_state->color_mgmt_changed |= replaced; | |
3562 | ||
3563 | ret = drm_atomic_commit(state); | |
3564 | ||
3565 | fail: | |
3566 | drm_atomic_state_put(state); | |
3567 | drm_property_blob_put(blob); | |
3568 | return ret; | |
3569 | } | |
3570 | EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set); | |
f32df58a BB |
3571 | |
3572 | /** | |
3573 | * drm_atomic_helper_bridge_propagate_bus_fmt() - Propagate output format to | |
3574 | * the input end of a bridge | |
3575 | * @bridge: bridge control structure | |
3576 | * @bridge_state: new bridge state | |
3577 | * @crtc_state: new CRTC state | |
3578 | * @conn_state: new connector state | |
3579 | * @output_fmt: tested output bus format | |
3580 | * @num_input_fmts: will contain the size of the returned array | |
3581 | * | |
3582 | * This helper is a pluggable implementation of the | |
3583 | * &drm_bridge_funcs.atomic_get_input_bus_fmts operation for bridges that don't | |
3584 | * modify the bus configuration between their input and their output. It | |
3585 | * returns an array of input formats with a single element set to @output_fmt. | |
3586 | * | |
3587 | * RETURNS: | |
3588 | * a valid format array of size @num_input_fmts, or NULL if the allocation | |
3589 | * failed | |
3590 | */ | |
3591 | u32 * | |
3592 | drm_atomic_helper_bridge_propagate_bus_fmt(struct drm_bridge *bridge, | |
3593 | struct drm_bridge_state *bridge_state, | |
3594 | struct drm_crtc_state *crtc_state, | |
3595 | struct drm_connector_state *conn_state, | |
3596 | u32 output_fmt, | |
3597 | unsigned int *num_input_fmts) | |
3598 | { | |
3599 | u32 *input_fmts; | |
3600 | ||
3601 | input_fmts = kzalloc(sizeof(*input_fmts), GFP_KERNEL); | |
3602 | if (!input_fmts) { | |
3603 | *num_input_fmts = 0; | |
3604 | return NULL; | |
3605 | } | |
3606 | ||
3607 | *num_input_fmts = 1; | |
3608 | input_fmts[0] = output_fmt; | |
3609 | return input_fmts; | |
3610 | } | |
3611 | EXPORT_SYMBOL(drm_atomic_helper_bridge_propagate_bus_fmt); |