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> |
7d30963f | 38 | #include <drm/drm_gem_atomic_helper.h> |
c2fcd274 | 39 | #include <drm/drm_plane_helper.h> |
0500c04e | 40 | #include <drm/drm_print.h> |
1452c25b | 41 | #include <drm/drm_self_refresh_helper.h> |
0500c04e | 42 | #include <drm/drm_vblank.h> |
935774cd | 43 | #include <drm/drm_writeback.h> |
c2fcd274 | 44 | |
faf94a08 | 45 | #include "drm_crtc_helper_internal.h" |
44d1240d MS |
46 | #include "drm_crtc_internal.h" |
47 | ||
3150c7d0 DV |
48 | /** |
49 | * DOC: overview | |
50 | * | |
51 | * This helper library provides implementations of check and commit functions on | |
52 | * top of the CRTC modeset helper callbacks and the plane helper callbacks. It | |
53 | * also provides convenience implementations for the atomic state handling | |
54 | * callbacks for drivers which don't need to subclass the drm core structures to | |
55 | * add their own additional internal state. | |
56 | * | |
57 | * This library also provides default implementations for the check callback in | |
26196f7e DV |
58 | * drm_atomic_helper_check() and for the commit callback with |
59 | * drm_atomic_helper_commit(). But the individual stages and callbacks are | |
60 | * exposed to allow drivers to mix and match and e.g. use the plane helpers only | |
3150c7d0 DV |
61 | * together with a driver private modeset implementation. |
62 | * | |
63 | * This library also provides implementations for all the legacy driver | |
26196f7e | 64 | * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(), |
ee84c58b DH |
65 | * drm_atomic_helper_disable_plane(), and the various functions to implement |
66 | * set_property callbacks. New drivers must not implement these functions | |
67 | * themselves but must use the provided helpers. | |
092d01da DV |
68 | * |
69 | * The atomic helper uses the same function table structures as all other | |
ea0dd85a DV |
70 | * modesetting helpers. See the documentation for &struct drm_crtc_helper_funcs, |
71 | * struct &drm_encoder_helper_funcs and &struct drm_connector_helper_funcs. It | |
72 | * also shares the &struct drm_plane_helper_funcs function table with the plane | |
092d01da | 73 | * helpers. |
3150c7d0 | 74 | */ |
c2fcd274 DV |
75 | static void |
76 | drm_atomic_helper_plane_changed(struct drm_atomic_state *state, | |
415c3ac3 | 77 | struct drm_plane_state *old_plane_state, |
c2fcd274 DV |
78 | struct drm_plane_state *plane_state, |
79 | struct drm_plane *plane) | |
80 | { | |
81 | struct drm_crtc_state *crtc_state; | |
82 | ||
415c3ac3 | 83 | if (old_plane_state->crtc) { |
b4d93679 ML |
84 | crtc_state = drm_atomic_get_new_crtc_state(state, |
85 | old_plane_state->crtc); | |
c2fcd274 DV |
86 | |
87 | if (WARN_ON(!crtc_state)) | |
88 | return; | |
89 | ||
90 | crtc_state->planes_changed = true; | |
91 | } | |
92 | ||
93 | if (plane_state->crtc) { | |
b4d93679 | 94 | crtc_state = drm_atomic_get_new_crtc_state(state, plane_state->crtc); |
c2fcd274 DV |
95 | |
96 | if (WARN_ON(!crtc_state)) | |
97 | return; | |
98 | ||
99 | crtc_state->planes_changed = true; | |
100 | } | |
101 | } | |
102 | ||
8248b65d ML |
103 | static int handle_conflicting_encoders(struct drm_atomic_state *state, |
104 | bool disable_conflicting_encoders) | |
97ac3204 | 105 | { |
415c3ac3 | 106 | struct drm_connector_state *new_conn_state; |
40616a26 | 107 | struct drm_connector *connector; |
c36a3254 | 108 | struct drm_connector_list_iter conn_iter; |
40616a26 | 109 | struct drm_encoder *encoder; |
9237ec1f | 110 | unsigned int encoder_mask = 0; |
c36a3254 | 111 | int i, ret = 0; |
97ac3204 | 112 | |
8248b65d ML |
113 | /* |
114 | * First loop, find all newly assigned encoders from the connectors | |
115 | * part of the state. If the same encoder is assigned to multiple | |
116 | * connectors bail out. | |
117 | */ | |
415c3ac3 | 118 | for_each_new_connector_in_state(state, connector, new_conn_state, i) { |
40616a26 ML |
119 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; |
120 | struct drm_encoder *new_encoder; | |
121 | ||
415c3ac3 | 122 | if (!new_conn_state->crtc) |
97ac3204 DV |
123 | continue; |
124 | ||
40616a26 | 125 | if (funcs->atomic_best_encoder) |
eca22edb MR |
126 | new_encoder = funcs->atomic_best_encoder(connector, |
127 | state); | |
a0909cc5 | 128 | else if (funcs->best_encoder) |
40616a26 | 129 | new_encoder = funcs->best_encoder(connector); |
a0909cc5 | 130 | else |
a92462d6 | 131 | new_encoder = drm_connector_get_single_encoder(connector); |
40616a26 | 132 | |
8248b65d | 133 | if (new_encoder) { |
6f3be036 | 134 | if (encoder_mask & drm_encoder_mask(new_encoder)) { |
6e22dc35 CS |
135 | drm_dbg_atomic(connector->dev, |
136 | "[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n", | |
137 | new_encoder->base.id, new_encoder->name, | |
138 | connector->base.id, connector->name); | |
8248b65d ML |
139 | |
140 | return -EINVAL; | |
141 | } | |
142 | ||
6f3be036 | 143 | encoder_mask |= drm_encoder_mask(new_encoder); |
8248b65d | 144 | } |
97ac3204 DV |
145 | } |
146 | ||
8248b65d ML |
147 | if (!encoder_mask) |
148 | return 0; | |
97ac3204 | 149 | |
8248b65d ML |
150 | /* |
151 | * Second loop, iterate over all connectors not part of the state. | |
152 | * | |
153 | * If a conflicting encoder is found and disable_conflicting_encoders | |
154 | * is not set, an error is returned. Userspace can provide a solution | |
155 | * through the atomic ioctl. | |
156 | * | |
42240c90 TR |
157 | * If the flag is set conflicting connectors are removed from the CRTC |
158 | * and the CRTC is disabled if no encoder is left. This preserves | |
8248b65d ML |
159 | * compatibility with the legacy set_config behavior. |
160 | */ | |
b982dab1 | 161 | drm_connector_list_iter_begin(state->dev, &conn_iter); |
c36a3254 | 162 | drm_for_each_connector_iter(connector, &conn_iter) { |
40616a26 | 163 | struct drm_crtc_state *crtc_state; |
623369e5 | 164 | |
b4d93679 | 165 | if (drm_atomic_get_new_connector_state(state, connector)) |
40616a26 | 166 | continue; |
623369e5 | 167 | |
40616a26 | 168 | encoder = connector->state->best_encoder; |
6f3be036 | 169 | if (!encoder || !(encoder_mask & drm_encoder_mask(encoder))) |
623369e5 DV |
170 | continue; |
171 | ||
8248b65d | 172 | if (!disable_conflicting_encoders) { |
6e22dc35 CS |
173 | drm_dbg_atomic(connector->dev, |
174 | "[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n", | |
175 | encoder->base.id, encoder->name, | |
176 | connector->state->crtc->base.id, | |
177 | connector->state->crtc->name, | |
178 | connector->base.id, connector->name); | |
c36a3254 DV |
179 | ret = -EINVAL; |
180 | goto out; | |
8248b65d ML |
181 | } |
182 | ||
415c3ac3 ML |
183 | new_conn_state = drm_atomic_get_connector_state(state, connector); |
184 | if (IS_ERR(new_conn_state)) { | |
185 | ret = PTR_ERR(new_conn_state); | |
c36a3254 DV |
186 | goto out; |
187 | } | |
40616a26 | 188 | |
6e22dc35 CS |
189 | drm_dbg_atomic(connector->dev, |
190 | "[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n", | |
191 | encoder->base.id, encoder->name, | |
192 | new_conn_state->crtc->base.id, new_conn_state->crtc->name, | |
193 | connector->base.id, connector->name); | |
40616a26 | 194 | |
b4d93679 | 195 | crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); |
40616a26 | 196 | |
415c3ac3 | 197 | ret = drm_atomic_set_crtc_for_connector(new_conn_state, NULL); |
40616a26 | 198 | if (ret) |
c36a3254 | 199 | goto out; |
40616a26 ML |
200 | |
201 | if (!crtc_state->connector_mask) { | |
202 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, | |
203 | NULL); | |
204 | if (ret < 0) | |
c36a3254 | 205 | goto out; |
40616a26 ML |
206 | |
207 | crtc_state->active = false; | |
208 | } | |
623369e5 | 209 | } |
c36a3254 | 210 | out: |
b982dab1 | 211 | drm_connector_list_iter_end(&conn_iter); |
623369e5 | 212 | |
c36a3254 | 213 | return ret; |
623369e5 DV |
214 | } |
215 | ||
e87a52b3 ML |
216 | static void |
217 | set_best_encoder(struct drm_atomic_state *state, | |
218 | struct drm_connector_state *conn_state, | |
219 | struct drm_encoder *encoder) | |
220 | { | |
221 | struct drm_crtc_state *crtc_state; | |
222 | struct drm_crtc *crtc; | |
223 | ||
224 | if (conn_state->best_encoder) { | |
225 | /* Unset the encoder_mask in the old crtc state. */ | |
226 | crtc = conn_state->connector->state->crtc; | |
227 | ||
228 | /* A NULL crtc is an error here because we should have | |
dbe2d2bf | 229 | * duplicated a NULL best_encoder when crtc was NULL. |
e87a52b3 ML |
230 | * As an exception restoring duplicated atomic state |
231 | * during resume is allowed, so don't warn when | |
232 | * best_encoder is equal to encoder we intend to set. | |
233 | */ | |
234 | WARN_ON(!crtc && encoder != conn_state->best_encoder); | |
235 | if (crtc) { | |
b4d93679 | 236 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); |
e87a52b3 ML |
237 | |
238 | crtc_state->encoder_mask &= | |
6f3be036 | 239 | ~drm_encoder_mask(conn_state->best_encoder); |
e87a52b3 ML |
240 | } |
241 | } | |
242 | ||
243 | if (encoder) { | |
244 | crtc = conn_state->crtc; | |
245 | WARN_ON(!crtc); | |
246 | if (crtc) { | |
b4d93679 | 247 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); |
e87a52b3 ML |
248 | |
249 | crtc_state->encoder_mask |= | |
6f3be036 | 250 | drm_encoder_mask(encoder); |
e87a52b3 ML |
251 | } |
252 | } | |
253 | ||
254 | conn_state->best_encoder = encoder; | |
255 | } | |
256 | ||
ec5aaa58 | 257 | static void |
623369e5 | 258 | steal_encoder(struct drm_atomic_state *state, |
ff19b786 | 259 | struct drm_encoder *encoder) |
623369e5 | 260 | { |
623369e5 DV |
261 | struct drm_crtc_state *crtc_state; |
262 | struct drm_connector *connector; | |
415c3ac3 | 263 | struct drm_connector_state *old_connector_state, *new_connector_state; |
ec5aaa58 | 264 | int i; |
623369e5 | 265 | |
415c3ac3 | 266 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { |
ff19b786 | 267 | struct drm_crtc *encoder_crtc; |
623369e5 | 268 | |
415c3ac3 | 269 | if (new_connector_state->best_encoder != encoder) |
623369e5 DV |
270 | continue; |
271 | ||
415c3ac3 | 272 | encoder_crtc = old_connector_state->crtc; |
623369e5 | 273 | |
6e22dc35 CS |
274 | drm_dbg_atomic(encoder->dev, |
275 | "[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n", | |
276 | encoder->base.id, encoder->name, | |
277 | encoder_crtc->base.id, encoder_crtc->name); | |
e87a52b3 | 278 | |
415c3ac3 | 279 | set_best_encoder(state, new_connector_state, NULL); |
623369e5 | 280 | |
b4d93679 | 281 | crtc_state = drm_atomic_get_new_crtc_state(state, encoder_crtc); |
ff19b786 ML |
282 | crtc_state->connectors_changed = true; |
283 | ||
ec5aaa58 | 284 | return; |
623369e5 | 285 | } |
623369e5 DV |
286 | } |
287 | ||
288 | static int | |
9459545b ML |
289 | update_connector_routing(struct drm_atomic_state *state, |
290 | struct drm_connector *connector, | |
415c3ac3 ML |
291 | struct drm_connector_state *old_connector_state, |
292 | struct drm_connector_state *new_connector_state) | |
623369e5 | 293 | { |
b5ceff20 | 294 | const struct drm_connector_helper_funcs *funcs; |
623369e5 | 295 | struct drm_encoder *new_encoder; |
623369e5 | 296 | struct drm_crtc_state *crtc_state; |
623369e5 | 297 | |
6e22dc35 CS |
298 | drm_dbg_atomic(connector->dev, "Updating routing for [CONNECTOR:%d:%s]\n", |
299 | connector->base.id, connector->name); | |
623369e5 | 300 | |
415c3ac3 ML |
301 | if (old_connector_state->crtc != new_connector_state->crtc) { |
302 | if (old_connector_state->crtc) { | |
b4d93679 | 303 | crtc_state = drm_atomic_get_new_crtc_state(state, old_connector_state->crtc); |
fc596660 | 304 | crtc_state->connectors_changed = true; |
623369e5 DV |
305 | } |
306 | ||
415c3ac3 | 307 | if (new_connector_state->crtc) { |
b4d93679 | 308 | crtc_state = drm_atomic_get_new_crtc_state(state, new_connector_state->crtc); |
fc596660 | 309 | crtc_state->connectors_changed = true; |
623369e5 DV |
310 | } |
311 | } | |
312 | ||
415c3ac3 | 313 | if (!new_connector_state->crtc) { |
6e22dc35 CS |
314 | drm_dbg_atomic(connector->dev, "Disabling [CONNECTOR:%d:%s]\n", |
315 | connector->base.id, connector->name); | |
623369e5 | 316 | |
415c3ac3 | 317 | set_best_encoder(state, new_connector_state, NULL); |
623369e5 DV |
318 | |
319 | return 0; | |
320 | } | |
321 | ||
de9f8eea LP |
322 | crtc_state = drm_atomic_get_new_crtc_state(state, |
323 | new_connector_state->crtc); | |
324 | /* | |
325 | * For compatibility with legacy users, we want to make sure that | |
326 | * we allow DPMS On->Off modesets on unregistered connectors. Modesets | |
327 | * which would result in anything else must be considered invalid, to | |
328 | * avoid turning on new displays on dead connectors. | |
329 | * | |
330 | * Since the connector can be unregistered at any point during an | |
331 | * atomic check or commit, this is racy. But that's OK: all we care | |
332 | * about is ensuring that userspace can't do anything but shut off the | |
1e55a53a | 333 | * display on a connector that was destroyed after it's been notified, |
de9f8eea | 334 | * not before. |
022debad LP |
335 | * |
336 | * Additionally, we also want to ignore connector registration when | |
337 | * we're trying to restore an atomic state during system resume since | |
338 | * there's a chance the connector may have been destroyed during the | |
339 | * process, but it's better to ignore that then cause | |
340 | * drm_atomic_helper_resume() to fail. | |
de9f8eea | 341 | */ |
022debad LP |
342 | if (!state->duplicated && drm_connector_is_unregistered(connector) && |
343 | crtc_state->active) { | |
6e22dc35 CS |
344 | drm_dbg_atomic(connector->dev, |
345 | "[CONNECTOR:%d:%s] is not registered\n", | |
346 | connector->base.id, connector->name); | |
de9f8eea LP |
347 | return -EINVAL; |
348 | } | |
349 | ||
623369e5 | 350 | funcs = connector->helper_private; |
3b8a684b DV |
351 | |
352 | if (funcs->atomic_best_encoder) | |
eca22edb | 353 | new_encoder = funcs->atomic_best_encoder(connector, state); |
c61b93fe | 354 | else if (funcs->best_encoder) |
3b8a684b | 355 | new_encoder = funcs->best_encoder(connector); |
c61b93fe | 356 | else |
a92462d6 | 357 | new_encoder = drm_connector_get_single_encoder(connector); |
623369e5 DV |
358 | |
359 | if (!new_encoder) { | |
6e22dc35 CS |
360 | drm_dbg_atomic(connector->dev, |
361 | "No suitable encoder found for [CONNECTOR:%d:%s]\n", | |
362 | connector->base.id, connector->name); | |
623369e5 DV |
363 | return -EINVAL; |
364 | } | |
365 | ||
415c3ac3 | 366 | if (!drm_encoder_crtc_ok(new_encoder, new_connector_state->crtc)) { |
6e22dc35 CS |
367 | drm_dbg_atomic(connector->dev, |
368 | "[ENCODER:%d:%s] incompatible with [CRTC:%d:%s]\n", | |
369 | new_encoder->base.id, | |
370 | new_encoder->name, | |
371 | new_connector_state->crtc->base.id, | |
372 | new_connector_state->crtc->name); | |
5481c8fb DV |
373 | return -EINVAL; |
374 | } | |
375 | ||
415c3ac3 ML |
376 | if (new_encoder == new_connector_state->best_encoder) { |
377 | set_best_encoder(state, new_connector_state, new_encoder); | |
e87a52b3 | 378 | |
6e22dc35 CS |
379 | drm_dbg_atomic(connector->dev, |
380 | "[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n", | |
381 | connector->base.id, | |
382 | connector->name, | |
383 | new_encoder->base.id, | |
384 | new_encoder->name, | |
385 | new_connector_state->crtc->base.id, | |
386 | new_connector_state->crtc->name); | |
623369e5 DV |
387 | |
388 | return 0; | |
389 | } | |
390 | ||
ec5aaa58 | 391 | steal_encoder(state, new_encoder); |
6ea76f3c | 392 | |
415c3ac3 | 393 | set_best_encoder(state, new_connector_state, new_encoder); |
e87a52b3 | 394 | |
fc596660 | 395 | crtc_state->connectors_changed = true; |
623369e5 | 396 | |
6e22dc35 CS |
397 | drm_dbg_atomic(connector->dev, |
398 | "[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n", | |
399 | connector->base.id, | |
400 | connector->name, | |
401 | new_encoder->base.id, | |
402 | new_encoder->name, | |
403 | new_connector_state->crtc->base.id, | |
404 | new_connector_state->crtc->name); | |
623369e5 DV |
405 | |
406 | return 0; | |
407 | } | |
408 | ||
409 | static int | |
410 | mode_fixup(struct drm_atomic_state *state) | |
411 | { | |
df63b999 | 412 | struct drm_crtc *crtc; |
415c3ac3 | 413 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 414 | struct drm_connector *connector; |
415c3ac3 | 415 | struct drm_connector_state *new_conn_state; |
623369e5 | 416 | int i; |
f9ad86e4 | 417 | int ret; |
623369e5 | 418 | |
415c3ac3 ML |
419 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
420 | if (!new_crtc_state->mode_changed && | |
421 | !new_crtc_state->connectors_changed) | |
623369e5 DV |
422 | continue; |
423 | ||
415c3ac3 | 424 | drm_mode_copy(&new_crtc_state->adjusted_mode, &new_crtc_state->mode); |
623369e5 DV |
425 | } |
426 | ||
415c3ac3 | 427 | for_each_new_connector_in_state(state, connector, new_conn_state, i) { |
b5ceff20 | 428 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 429 | struct drm_encoder *encoder; |
35a61fe9 | 430 | struct drm_bridge *bridge; |
623369e5 | 431 | |
415c3ac3 | 432 | WARN_ON(!!new_conn_state->best_encoder != !!new_conn_state->crtc); |
623369e5 | 433 | |
415c3ac3 | 434 | if (!new_conn_state->crtc || !new_conn_state->best_encoder) |
623369e5 DV |
435 | continue; |
436 | ||
415c3ac3 | 437 | new_crtc_state = |
b4d93679 | 438 | drm_atomic_get_new_crtc_state(state, new_conn_state->crtc); |
623369e5 DV |
439 | |
440 | /* | |
441 | * Each encoder has at most one connector (since we always steal | |
442 | * it away), so we won't call ->mode_fixup twice. | |
443 | */ | |
415c3ac3 | 444 | encoder = new_conn_state->best_encoder; |
623369e5 DV |
445 | funcs = encoder->helper_private; |
446 | ||
35a61fe9 | 447 | bridge = drm_bridge_chain_get_first_bridge(encoder); |
5061b8a9 BB |
448 | ret = drm_atomic_bridge_chain_check(bridge, |
449 | new_crtc_state, | |
450 | new_conn_state); | |
451 | if (ret) { | |
6e22dc35 | 452 | drm_dbg_atomic(encoder->dev, "Bridge atomic check failed\n"); |
5061b8a9 | 453 | return ret; |
623369e5 DV |
454 | } |
455 | ||
2827635e | 456 | if (funcs && funcs->atomic_check) { |
415c3ac3 ML |
457 | ret = funcs->atomic_check(encoder, new_crtc_state, |
458 | new_conn_state); | |
4cd4df80 | 459 | if (ret) { |
6e22dc35 CS |
460 | drm_dbg_atomic(encoder->dev, |
461 | "[ENCODER:%d:%s] check failed\n", | |
462 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
463 | return ret; |
464 | } | |
2827635e | 465 | } else if (funcs && funcs->mode_fixup) { |
415c3ac3 ML |
466 | ret = funcs->mode_fixup(encoder, &new_crtc_state->mode, |
467 | &new_crtc_state->adjusted_mode); | |
4cd4df80 | 468 | if (!ret) { |
6e22dc35 CS |
469 | drm_dbg_atomic(encoder->dev, |
470 | "[ENCODER:%d:%s] fixup failed\n", | |
471 | encoder->base.id, encoder->name); | |
4cd4df80 TR |
472 | return -EINVAL; |
473 | } | |
623369e5 DV |
474 | } |
475 | } | |
476 | ||
415c3ac3 | 477 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
b5ceff20 | 478 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 479 | |
415c3ac3 | 480 | if (!new_crtc_state->enable) |
f55f1701 LY |
481 | continue; |
482 | ||
415c3ac3 ML |
483 | if (!new_crtc_state->mode_changed && |
484 | !new_crtc_state->connectors_changed) | |
623369e5 DV |
485 | continue; |
486 | ||
487 | funcs = crtc->helper_private; | |
26564be5 | 488 | if (!funcs || !funcs->mode_fixup) |
840bfe95 ACO |
489 | continue; |
490 | ||
415c3ac3 ML |
491 | ret = funcs->mode_fixup(crtc, &new_crtc_state->mode, |
492 | &new_crtc_state->adjusted_mode); | |
623369e5 | 493 | if (!ret) { |
6e22dc35 CS |
494 | drm_dbg_atomic(crtc->dev, "[CRTC:%d:%s] fixup failed\n", |
495 | crtc->base.id, crtc->name); | |
623369e5 DV |
496 | return -EINVAL; |
497 | } | |
498 | } | |
499 | ||
500 | return 0; | |
501 | } | |
502 | ||
faf94a08 JA |
503 | static enum drm_mode_status mode_valid_path(struct drm_connector *connector, |
504 | struct drm_encoder *encoder, | |
505 | struct drm_crtc *crtc, | |
8518f05a | 506 | const struct drm_display_mode *mode) |
faf94a08 | 507 | { |
35a61fe9 | 508 | struct drm_bridge *bridge; |
faf94a08 JA |
509 | enum drm_mode_status ret; |
510 | ||
511 | ret = drm_encoder_mode_valid(encoder, mode); | |
512 | if (ret != MODE_OK) { | |
6e22dc35 CS |
513 | drm_dbg_atomic(encoder->dev, |
514 | "[ENCODER:%d:%s] mode_valid() failed\n", | |
515 | encoder->base.id, encoder->name); | |
faf94a08 JA |
516 | return ret; |
517 | } | |
518 | ||
35a61fe9 | 519 | bridge = drm_bridge_chain_get_first_bridge(encoder); |
12c683e1 LP |
520 | ret = drm_bridge_chain_mode_valid(bridge, &connector->display_info, |
521 | mode); | |
faf94a08 | 522 | if (ret != MODE_OK) { |
6e22dc35 | 523 | drm_dbg_atomic(encoder->dev, "[BRIDGE] mode_valid() failed\n"); |
faf94a08 JA |
524 | return ret; |
525 | } | |
526 | ||
527 | ret = drm_crtc_mode_valid(crtc, mode); | |
528 | if (ret != MODE_OK) { | |
6e22dc35 CS |
529 | drm_dbg_atomic(encoder->dev, "[CRTC:%d:%s] mode_valid() failed\n", |
530 | crtc->base.id, crtc->name); | |
faf94a08 JA |
531 | return ret; |
532 | } | |
533 | ||
534 | return ret; | |
535 | } | |
536 | ||
537 | static int | |
538 | mode_valid(struct drm_atomic_state *state) | |
539 | { | |
540 | struct drm_connector_state *conn_state; | |
541 | struct drm_connector *connector; | |
542 | int i; | |
543 | ||
544 | for_each_new_connector_in_state(state, connector, conn_state, i) { | |
545 | struct drm_encoder *encoder = conn_state->best_encoder; | |
546 | struct drm_crtc *crtc = conn_state->crtc; | |
547 | struct drm_crtc_state *crtc_state; | |
548 | enum drm_mode_status mode_status; | |
8518f05a | 549 | const struct drm_display_mode *mode; |
faf94a08 JA |
550 | |
551 | if (!crtc || !encoder) | |
552 | continue; | |
553 | ||
554 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); | |
555 | if (!crtc_state) | |
556 | continue; | |
557 | if (!crtc_state->mode_changed && !crtc_state->connectors_changed) | |
558 | continue; | |
559 | ||
560 | mode = &crtc_state->mode; | |
561 | ||
562 | mode_status = mode_valid_path(connector, encoder, crtc, mode); | |
563 | if (mode_status != MODE_OK) | |
564 | return -EINVAL; | |
565 | } | |
566 | ||
567 | return 0; | |
568 | } | |
569 | ||
d9b13620 | 570 | /** |
f98bd3ef | 571 | * drm_atomic_helper_check_modeset - validate state object for modeset changes |
d9b13620 DV |
572 | * @dev: DRM device |
573 | * @state: the driver state object | |
574 | * | |
575 | * Check the state object to see if the requested state is physically possible. | |
42240c90 | 576 | * This does all the CRTC and connector related computations for an atomic |
ce09d766 ML |
577 | * update and adds any additional connectors needed for full modesets. It calls |
578 | * the various per-object callbacks in the follow order: | |
579 | * | |
580 | * 1. &drm_connector_helper_funcs.atomic_best_encoder for determining the new encoder. | |
581 | * 2. &drm_connector_helper_funcs.atomic_check to validate the connector state. | |
dbe2d2bf | 582 | * 3. If it's determined a modeset is needed then all connectors on the affected |
42240c90 | 583 | * CRTC are added and &drm_connector_helper_funcs.atomic_check is run on them. |
faf94a08 JA |
584 | * 4. &drm_encoder_helper_funcs.mode_valid, &drm_bridge_funcs.mode_valid and |
585 | * &drm_crtc_helper_funcs.mode_valid are called on the affected components. | |
586 | * 5. &drm_bridge_funcs.mode_fixup is called on all encoder bridges. | |
587 | * 6. &drm_encoder_helper_funcs.atomic_check is called to validate any encoder state. | |
42240c90 | 588 | * This function is only called when the encoder will be part of a configured CRTC, |
ce09d766 ML |
589 | * it must not be used for implementing connector property validation. |
590 | * If this function is NULL, &drm_atomic_encoder_helper_funcs.mode_fixup is called | |
591 | * instead. | |
42240c90 | 592 | * 7. &drm_crtc_helper_funcs.mode_fixup is called last, to fix up the mode with CRTC constraints. |
6806cdf9 DV |
593 | * |
594 | * &drm_crtc_state.mode_changed is set when the input mode is changed. | |
595 | * &drm_crtc_state.connectors_changed is set when a connector is added or | |
42240c90 | 596 | * removed from the CRTC. &drm_crtc_state.active_changed is set when |
6806cdf9 | 597 | * &drm_crtc_state.active changes, which is used for DPMS. |
7beb691f | 598 | * &drm_crtc_state.no_vblank is set from the result of drm_dev_has_vblank(). |
d807ed1c | 599 | * See also: drm_atomic_crtc_needs_modeset() |
d9b13620 DV |
600 | * |
601 | * IMPORTANT: | |
602 | * | |
6806cdf9 DV |
603 | * Drivers which set &drm_crtc_state.mode_changed (e.g. in their |
604 | * &drm_plane_helper_funcs.atomic_check hooks if a plane update can't be done | |
ee84c58b DH |
605 | * without a full modeset) _must_ call this function after that change. It is |
606 | * permitted to call this function multiple times for the same update, e.g. | |
607 | * when the &drm_crtc_helper_funcs.atomic_check functions depend upon the | |
608 | * adjusted dotclock for fifo space allocation and watermark computation. | |
d9b13620 | 609 | * |
c39032a8 | 610 | * RETURNS: |
d9b13620 DV |
611 | * Zero for success or -errno |
612 | */ | |
613 | int | |
934ce1c2 | 614 | drm_atomic_helper_check_modeset(struct drm_device *dev, |
623369e5 DV |
615 | struct drm_atomic_state *state) |
616 | { | |
623369e5 | 617 | struct drm_crtc *crtc; |
415c3ac3 | 618 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
df63b999 | 619 | struct drm_connector *connector; |
415c3ac3 | 620 | struct drm_connector_state *old_connector_state, *new_connector_state; |
623369e5 | 621 | int i, ret; |
9237ec1f | 622 | unsigned int connectors_mask = 0; |
623369e5 | 623 | |
415c3ac3 | 624 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
970ece83 ML |
625 | bool has_connectors = |
626 | !!new_crtc_state->connector_mask; | |
627 | ||
869e188a DV |
628 | WARN_ON(!drm_modeset_is_locked(&crtc->mutex)); |
629 | ||
415c3ac3 | 630 | if (!drm_mode_equal(&old_crtc_state->mode, &new_crtc_state->mode)) { |
6e22dc35 CS |
631 | drm_dbg_atomic(dev, "[CRTC:%d:%s] mode changed\n", |
632 | crtc->base.id, crtc->name); | |
415c3ac3 | 633 | new_crtc_state->mode_changed = true; |
623369e5 DV |
634 | } |
635 | ||
415c3ac3 | 636 | if (old_crtc_state->enable != new_crtc_state->enable) { |
6e22dc35 CS |
637 | drm_dbg_atomic(dev, "[CRTC:%d:%s] enable changed\n", |
638 | crtc->base.id, crtc->name); | |
fc596660 ML |
639 | |
640 | /* | |
641 | * For clarity this assignment is done here, but | |
642 | * enable == 0 is only true when there are no | |
643 | * connectors and a NULL mode. | |
644 | * | |
645 | * The other way around is true as well. enable != 0 | |
0ae865ef | 646 | * implies that connectors are attached and a mode is set. |
fc596660 | 647 | */ |
415c3ac3 ML |
648 | new_crtc_state->mode_changed = true; |
649 | new_crtc_state->connectors_changed = true; | |
623369e5 | 650 | } |
24d6652c ML |
651 | |
652 | if (old_crtc_state->active != new_crtc_state->active) { | |
6e22dc35 CS |
653 | drm_dbg_atomic(dev, "[CRTC:%d:%s] active changed\n", |
654 | crtc->base.id, crtc->name); | |
24d6652c ML |
655 | new_crtc_state->active_changed = true; |
656 | } | |
970ece83 ML |
657 | |
658 | if (new_crtc_state->enable != has_connectors) { | |
6e22dc35 CS |
659 | drm_dbg_atomic(dev, "[CRTC:%d:%s] enabled/connectors mismatch\n", |
660 | crtc->base.id, crtc->name); | |
970ece83 ML |
661 | |
662 | return -EINVAL; | |
663 | } | |
7beb691f TZ |
664 | |
665 | if (drm_dev_has_vblank(dev)) | |
666 | new_crtc_state->no_vblank = false; | |
667 | else | |
668 | new_crtc_state->no_vblank = true; | |
623369e5 DV |
669 | } |
670 | ||
44596b8c | 671 | ret = handle_conflicting_encoders(state, false); |
8248b65d ML |
672 | if (ret) |
673 | return ret; | |
40616a26 | 674 | |
415c3ac3 | 675 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { |
ce09d766 ML |
676 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; |
677 | ||
869e188a DV |
678 | WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex)); |
679 | ||
623369e5 | 680 | /* |
d807ed1c BS |
681 | * This only sets crtc->connectors_changed for routing changes, |
682 | * drivers must set crtc->connectors_changed themselves when | |
683 | * connector properties need to be updated. | |
623369e5 | 684 | */ |
9459545b | 685 | ret = update_connector_routing(state, connector, |
415c3ac3 ML |
686 | old_connector_state, |
687 | new_connector_state); | |
623369e5 DV |
688 | if (ret) |
689 | return ret; | |
415c3ac3 | 690 | if (old_connector_state->crtc) { |
b4d93679 ML |
691 | new_crtc_state = drm_atomic_get_new_crtc_state(state, |
692 | old_connector_state->crtc); | |
415c3ac3 ML |
693 | if (old_connector_state->link_status != |
694 | new_connector_state->link_status) | |
695 | new_crtc_state->connectors_changed = true; | |
47e22ff1 RS |
696 | |
697 | if (old_connector_state->max_requested_bpc != | |
698 | new_connector_state->max_requested_bpc) | |
699 | new_crtc_state->connectors_changed = true; | |
40ee6fbe | 700 | } |
ce09d766 ML |
701 | |
702 | if (funcs->atomic_check) | |
6f3b6278 | 703 | ret = funcs->atomic_check(connector, state); |
ce09d766 ML |
704 | if (ret) |
705 | return ret; | |
706 | ||
ca52bea9 | 707 | connectors_mask |= BIT(i); |
623369e5 DV |
708 | } |
709 | ||
710 | /* | |
711 | * After all the routing has been prepared we need to add in any | |
42240c90 | 712 | * connector which is itself unchanged, but whose CRTC changes its |
623369e5 DV |
713 | * configuration. This must be done before calling mode_fixup in case a |
714 | * crtc only changed its mode but has the same set of connectors. | |
715 | */ | |
415c3ac3 | 716 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
415c3ac3 | 717 | if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) |
623369e5 DV |
718 | continue; |
719 | ||
6e22dc35 CS |
720 | drm_dbg_atomic(dev, |
721 | "[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n", | |
722 | crtc->base.id, crtc->name, | |
723 | new_crtc_state->enable ? 'y' : 'n', | |
724 | new_crtc_state->active ? 'y' : 'n'); | |
623369e5 DV |
725 | |
726 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
727 | if (ret != 0) | |
728 | return ret; | |
729 | ||
57744aa7 ML |
730 | ret = drm_atomic_add_affected_planes(state, crtc); |
731 | if (ret != 0) | |
732 | return ret; | |
623369e5 DV |
733 | } |
734 | ||
ce09d766 ML |
735 | /* |
736 | * Iterate over all connectors again, to make sure atomic_check() | |
737 | * has been called on them when a modeset is forced. | |
738 | */ | |
739 | for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) { | |
740 | const struct drm_connector_helper_funcs *funcs = connector->helper_private; | |
741 | ||
742 | if (connectors_mask & BIT(i)) | |
743 | continue; | |
744 | ||
745 | if (funcs->atomic_check) | |
6f3b6278 | 746 | ret = funcs->atomic_check(connector, state); |
ce09d766 ML |
747 | if (ret) |
748 | return ret; | |
749 | } | |
750 | ||
75146591 BB |
751 | /* |
752 | * Iterate over all connectors again, and add all affected bridges to | |
753 | * the state. | |
754 | */ | |
755 | for_each_oldnew_connector_in_state(state, connector, | |
756 | old_connector_state, | |
757 | new_connector_state, i) { | |
758 | struct drm_encoder *encoder; | |
759 | ||
760 | encoder = old_connector_state->best_encoder; | |
761 | ret = drm_atomic_add_encoder_bridges(state, encoder); | |
762 | if (ret) | |
763 | return ret; | |
764 | ||
765 | encoder = new_connector_state->best_encoder; | |
766 | ret = drm_atomic_add_encoder_bridges(state, encoder); | |
767 | if (ret) | |
768 | return ret; | |
769 | } | |
770 | ||
faf94a08 JA |
771 | ret = mode_valid(state); |
772 | if (ret) | |
773 | return ret; | |
774 | ||
623369e5 DV |
775 | return mode_fixup(state); |
776 | } | |
d9b13620 | 777 | EXPORT_SYMBOL(drm_atomic_helper_check_modeset); |
623369e5 | 778 | |
a01cb8ba VS |
779 | /** |
780 | * drm_atomic_helper_check_plane_state() - Check plane state for validity | |
781 | * @plane_state: plane state to check | |
42240c90 | 782 | * @crtc_state: CRTC state to check |
a01cb8ba VS |
783 | * @min_scale: minimum @src:@dest scaling factor in 16.16 fixed point |
784 | * @max_scale: maximum @src:@dest scaling factor in 16.16 fixed point | |
785 | * @can_position: is it legal to position the plane such that it | |
42240c90 | 786 | * doesn't cover the entire CRTC? This will generally |
a01cb8ba | 787 | * only be false for primary planes. |
42240c90 | 788 | * @can_update_disabled: can the plane be updated while the CRTC |
a01cb8ba VS |
789 | * is disabled? |
790 | * | |
791 | * Checks that a desired plane update is valid, and updates various | |
792 | * bits of derived state (clipped coordinates etc.). Drivers that provide | |
793 | * their own plane handling rather than helper-provided implementations may | |
794 | * still wish to call this function to avoid duplication of error checking | |
795 | * code. | |
796 | * | |
797 | * RETURNS: | |
798 | * Zero if update appears valid, error code on failure | |
799 | */ | |
800 | int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state, | |
801 | const struct drm_crtc_state *crtc_state, | |
a01cb8ba VS |
802 | int min_scale, |
803 | int max_scale, | |
804 | bool can_position, | |
805 | bool can_update_disabled) | |
806 | { | |
807 | struct drm_framebuffer *fb = plane_state->fb; | |
808 | struct drm_rect *src = &plane_state->src; | |
809 | struct drm_rect *dst = &plane_state->dst; | |
810 | unsigned int rotation = plane_state->rotation; | |
81af63a4 | 811 | struct drm_rect clip = {}; |
a01cb8ba VS |
812 | int hscale, vscale; |
813 | ||
814 | WARN_ON(plane_state->crtc && plane_state->crtc != crtc_state->crtc); | |
815 | ||
816 | *src = drm_plane_state_src(plane_state); | |
817 | *dst = drm_plane_state_dest(plane_state); | |
818 | ||
819 | if (!fb) { | |
820 | plane_state->visible = false; | |
821 | return 0; | |
822 | } | |
823 | ||
824 | /* crtc should only be NULL when disabling (i.e., !fb) */ | |
825 | if (WARN_ON(!plane_state->crtc)) { | |
826 | plane_state->visible = false; | |
827 | return 0; | |
828 | } | |
829 | ||
830 | if (!crtc_state->enable && !can_update_disabled) { | |
bd672b75 CS |
831 | drm_dbg_kms(plane_state->plane->dev, |
832 | "Cannot update plane of a disabled CRTC.\n"); | |
a01cb8ba VS |
833 | return -EINVAL; |
834 | } | |
835 | ||
836 | drm_rect_rotate(src, fb->width << 16, fb->height << 16, rotation); | |
837 | ||
838 | /* Check scaling */ | |
839 | hscale = drm_rect_calc_hscale(src, dst, min_scale, max_scale); | |
840 | vscale = drm_rect_calc_vscale(src, dst, min_scale, max_scale); | |
841 | if (hscale < 0 || vscale < 0) { | |
bd672b75 CS |
842 | drm_dbg_kms(plane_state->plane->dev, |
843 | "Invalid scaling of plane\n"); | |
a01cb8ba VS |
844 | drm_rect_debug_print("src: ", &plane_state->src, true); |
845 | drm_rect_debug_print("dst: ", &plane_state->dst, false); | |
846 | return -ERANGE; | |
847 | } | |
848 | ||
81af63a4 VS |
849 | if (crtc_state->enable) |
850 | drm_mode_get_hv_timing(&crtc_state->mode, &clip.x2, &clip.y2); | |
851 | ||
f96bdf56 | 852 | plane_state->visible = drm_rect_clip_scaled(src, dst, &clip); |
a01cb8ba VS |
853 | |
854 | drm_rect_rotate_inv(src, fb->width << 16, fb->height << 16, rotation); | |
855 | ||
856 | if (!plane_state->visible) | |
857 | /* | |
858 | * Plane isn't visible; some drivers can handle this | |
859 | * so we just return success here. Drivers that can't | |
860 | * (including those that use the primary plane helper's | |
861 | * update function) will return an error from their | |
862 | * update_plane handler. | |
863 | */ | |
864 | return 0; | |
865 | ||
81af63a4 | 866 | if (!can_position && !drm_rect_equals(dst, &clip)) { |
bd672b75 CS |
867 | drm_dbg_kms(plane_state->plane->dev, |
868 | "Plane must cover entire CRTC\n"); | |
a01cb8ba | 869 | drm_rect_debug_print("dst: ", dst, false); |
81af63a4 | 870 | drm_rect_debug_print("clip: ", &clip, false); |
a01cb8ba VS |
871 | return -EINVAL; |
872 | } | |
873 | ||
874 | return 0; | |
875 | } | |
876 | EXPORT_SYMBOL(drm_atomic_helper_check_plane_state); | |
877 | ||
c2fcd274 | 878 | /** |
f98bd3ef | 879 | * drm_atomic_helper_check_planes - validate state object for planes changes |
c2fcd274 DV |
880 | * @dev: DRM device |
881 | * @state: the driver state object | |
882 | * | |
883 | * Check the state object to see if the requested state is physically possible. | |
d9b13620 | 884 | * This does all the plane update related checks using by calling into the |
6806cdf9 DV |
885 | * &drm_crtc_helper_funcs.atomic_check and &drm_plane_helper_funcs.atomic_check |
886 | * hooks provided by the driver. | |
c2fcd274 | 887 | * |
42240c90 | 888 | * It also sets &drm_crtc_state.planes_changed to indicate that a CRTC has |
fc596660 ML |
889 | * updated planes. |
890 | * | |
c39032a8 | 891 | * RETURNS: |
c2fcd274 DV |
892 | * Zero for success or -errno |
893 | */ | |
d9b13620 DV |
894 | int |
895 | drm_atomic_helper_check_planes(struct drm_device *dev, | |
896 | struct drm_atomic_state *state) | |
c2fcd274 | 897 | { |
df63b999 | 898 | struct drm_crtc *crtc; |
415c3ac3 | 899 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 900 | struct drm_plane *plane; |
415c3ac3 | 901 | struct drm_plane_state *new_plane_state, *old_plane_state; |
c2fcd274 DV |
902 | int i, ret = 0; |
903 | ||
415c3ac3 | 904 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { |
b5ceff20 | 905 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 906 | |
869e188a DV |
907 | WARN_ON(!drm_modeset_is_locked(&plane->mutex)); |
908 | ||
c2fcd274 DV |
909 | funcs = plane->helper_private; |
910 | ||
415c3ac3 | 911 | drm_atomic_helper_plane_changed(state, old_plane_state, new_plane_state, plane); |
c2fcd274 | 912 | |
d9778b40 DR |
913 | drm_atomic_helper_check_plane_damage(state, new_plane_state); |
914 | ||
c2fcd274 DV |
915 | if (!funcs || !funcs->atomic_check) |
916 | continue; | |
917 | ||
7c11b99a | 918 | ret = funcs->atomic_check(plane, state); |
c2fcd274 | 919 | if (ret) { |
6e22dc35 CS |
920 | drm_dbg_atomic(plane->dev, |
921 | "[PLANE:%d:%s] atomic driver check failed\n", | |
922 | plane->base.id, plane->name); | |
c2fcd274 DV |
923 | return ret; |
924 | } | |
925 | } | |
926 | ||
415c3ac3 | 927 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
b5ceff20 | 928 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
929 | |
930 | funcs = crtc->helper_private; | |
931 | ||
932 | if (!funcs || !funcs->atomic_check) | |
933 | continue; | |
934 | ||
29b77ad7 | 935 | ret = funcs->atomic_check(crtc, state); |
c2fcd274 | 936 | if (ret) { |
6e22dc35 CS |
937 | drm_dbg_atomic(crtc->dev, |
938 | "[CRTC:%d:%s] atomic driver check failed\n", | |
939 | crtc->base.id, crtc->name); | |
c2fcd274 DV |
940 | return ret; |
941 | } | |
942 | } | |
943 | ||
d9b13620 DV |
944 | return ret; |
945 | } | |
946 | EXPORT_SYMBOL(drm_atomic_helper_check_planes); | |
947 | ||
948 | /** | |
949 | * drm_atomic_helper_check - validate state object | |
950 | * @dev: DRM device | |
951 | * @state: the driver state object | |
952 | * | |
953 | * Check the state object to see if the requested state is physically possible. | |
42240c90 | 954 | * Only CRTCs and planes have check callbacks, so for any additional (global) |
d9b13620 | 955 | * checking that a driver needs it can simply wrap that around this function. |
6806cdf9 DV |
956 | * Drivers without such needs can directly use this as their |
957 | * &drm_mode_config_funcs.atomic_check callback. | |
d9b13620 | 958 | * |
b4274fbe DV |
959 | * This just wraps the two parts of the state checking for planes and modeset |
960 | * state in the default order: First it calls drm_atomic_helper_check_modeset() | |
961 | * and then drm_atomic_helper_check_planes(). The assumption is that the | |
6806cdf9 DV |
962 | * @drm_plane_helper_funcs.atomic_check and @drm_crtc_helper_funcs.atomic_check |
963 | * functions depend upon an updated adjusted_mode.clock to e.g. properly compute | |
964 | * watermarks. | |
b4274fbe | 965 | * |
49efffc7 PU |
966 | * Note that zpos normalization will add all enable planes to the state which |
967 | * might not desired for some drivers. | |
968 | * For example enable/disable of a cursor plane which have fixed zpos value | |
969 | * would trigger all other enabled planes to be forced to the state change. | |
970 | * | |
c39032a8 | 971 | * RETURNS: |
d9b13620 DV |
972 | * Zero for success or -errno |
973 | */ | |
974 | int drm_atomic_helper_check(struct drm_device *dev, | |
975 | struct drm_atomic_state *state) | |
976 | { | |
977 | int ret; | |
978 | ||
b4274fbe | 979 | ret = drm_atomic_helper_check_modeset(dev, state); |
d9b13620 DV |
980 | if (ret) |
981 | return ret; | |
982 | ||
49efffc7 PU |
983 | if (dev->mode_config.normalize_zpos) { |
984 | ret = drm_atomic_normalize_zpos(dev, state); | |
985 | if (ret) | |
986 | return ret; | |
987 | } | |
988 | ||
b4274fbe | 989 | ret = drm_atomic_helper_check_planes(dev, state); |
934ce1c2 RC |
990 | if (ret) |
991 | return ret; | |
992 | ||
fef9df8b GP |
993 | if (state->legacy_cursor_update) |
994 | state->async_update = !drm_atomic_helper_async_check(dev, state); | |
995 | ||
1452c25b SP |
996 | drm_self_refresh_helper_alter_state(state); |
997 | ||
c2fcd274 DV |
998 | return ret; |
999 | } | |
1000 | EXPORT_SYMBOL(drm_atomic_helper_check); | |
1001 | ||
1452c25b SP |
1002 | static bool |
1003 | crtc_needs_disable(struct drm_crtc_state *old_state, | |
1004 | struct drm_crtc_state *new_state) | |
1005 | { | |
1006 | /* | |
42240c90 | 1007 | * No new_state means the CRTC is off, so the only criteria is whether |
1452c25b SP |
1008 | * it's currently active or in self refresh mode. |
1009 | */ | |
1010 | if (!new_state) | |
1011 | return drm_atomic_crtc_effectively_active(old_state); | |
1012 | ||
1013 | /* | |
e54a4424 BN |
1014 | * We need to disable bridge(s) and CRTC if we're transitioning out of |
1015 | * self-refresh and changing CRTCs at the same time, because the | |
1016 | * bridge tracks self-refresh status via CRTC state. | |
1017 | */ | |
1018 | if (old_state->self_refresh_active && | |
1019 | old_state->crtc != new_state->crtc) | |
1020 | return true; | |
1021 | ||
1022 | /* | |
1023 | * We also need to run through the crtc_funcs->disable() function if | |
1024 | * the CRTC is currently on, if it's transitioning to self refresh | |
1025 | * mode, or if it's in self refresh mode and needs to be fully | |
1026 | * disabled. | |
1452c25b SP |
1027 | */ |
1028 | return old_state->active || | |
69e63001 | 1029 | (old_state->self_refresh_active && !new_state->active) || |
1452c25b SP |
1030 | new_state->self_refresh_active; |
1031 | } | |
1032 | ||
623369e5 DV |
1033 | static void |
1034 | disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state) | |
1035 | { | |
df63b999 | 1036 | struct drm_connector *connector; |
415c3ac3 | 1037 | struct drm_connector_state *old_conn_state, *new_conn_state; |
df63b999 | 1038 | struct drm_crtc *crtc; |
415c3ac3 | 1039 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
623369e5 DV |
1040 | int i; |
1041 | ||
415c3ac3 | 1042 | for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) { |
b5ceff20 | 1043 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 1044 | struct drm_encoder *encoder; |
35a61fe9 | 1045 | struct drm_bridge *bridge; |
623369e5 | 1046 | |
1758f403 FDF |
1047 | /* |
1048 | * Shut down everything that's in the changeset and currently | |
1049 | * still on. So need to check the old, saved state. | |
1050 | */ | |
df63b999 | 1051 | if (!old_conn_state->crtc) |
623369e5 DV |
1052 | continue; |
1053 | ||
b4d93679 | 1054 | old_crtc_state = drm_atomic_get_old_crtc_state(old_state, old_conn_state->crtc); |
eab3bbef | 1055 | |
1452c25b SP |
1056 | if (new_conn_state->crtc) |
1057 | new_crtc_state = drm_atomic_get_new_crtc_state( | |
1058 | old_state, | |
1059 | new_conn_state->crtc); | |
1060 | else | |
1061 | new_crtc_state = NULL; | |
1062 | ||
1063 | if (!crtc_needs_disable(old_crtc_state, new_crtc_state) || | |
2465ff62 | 1064 | !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state)) |
eab3bbef DV |
1065 | continue; |
1066 | ||
46df9adb | 1067 | encoder = old_conn_state->best_encoder; |
623369e5 | 1068 | |
46df9adb RC |
1069 | /* We shouldn't get this far if we didn't previously have |
1070 | * an encoder.. but WARN_ON() rather than explode. | |
1071 | */ | |
1072 | if (WARN_ON(!encoder)) | |
623369e5 DV |
1073 | continue; |
1074 | ||
1075 | funcs = encoder->helper_private; | |
1076 | ||
6e22dc35 CS |
1077 | drm_dbg_atomic(dev, "disabling [ENCODER:%d:%s]\n", |
1078 | encoder->base.id, encoder->name); | |
95d6eb3b | 1079 | |
623369e5 DV |
1080 | /* |
1081 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 1082 | * it away), so we won't call disable hooks twice. |
623369e5 | 1083 | */ |
35a61fe9 BB |
1084 | bridge = drm_bridge_chain_get_first_bridge(encoder); |
1085 | drm_atomic_bridge_chain_disable(bridge, old_state); | |
623369e5 DV |
1086 | |
1087 | /* Right function depends upon target state. */ | |
2827635e | 1088 | if (funcs) { |
43c76d72 SP |
1089 | if (funcs->atomic_disable) |
1090 | funcs->atomic_disable(encoder, old_state); | |
1091 | else if (new_conn_state->crtc && funcs->prepare) | |
2827635e NT |
1092 | funcs->prepare(encoder); |
1093 | else if (funcs->disable) | |
1094 | funcs->disable(encoder); | |
1095 | else if (funcs->dpms) | |
1096 | funcs->dpms(encoder, DRM_MODE_DPMS_OFF); | |
1097 | } | |
623369e5 | 1098 | |
35a61fe9 | 1099 | drm_atomic_bridge_chain_post_disable(bridge, old_state); |
623369e5 DV |
1100 | } |
1101 | ||
415c3ac3 | 1102 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
b5ceff20 | 1103 | const struct drm_crtc_helper_funcs *funcs; |
84014b0a | 1104 | int ret; |
623369e5 DV |
1105 | |
1106 | /* Shut down everything that needs a full modeset. */ | |
415c3ac3 | 1107 | if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) |
eab3bbef DV |
1108 | continue; |
1109 | ||
1452c25b | 1110 | if (!crtc_needs_disable(old_crtc_state, new_crtc_state)) |
623369e5 DV |
1111 | continue; |
1112 | ||
1113 | funcs = crtc->helper_private; | |
1114 | ||
6e22dc35 CS |
1115 | drm_dbg_atomic(dev, "disabling [CRTC:%d:%s]\n", |
1116 | crtc->base.id, crtc->name); | |
95d6eb3b DV |
1117 | |
1118 | ||
623369e5 | 1119 | /* Right function depends upon target state. */ |
415c3ac3 | 1120 | if (new_crtc_state->enable && funcs->prepare) |
623369e5 | 1121 | funcs->prepare(crtc); |
c9ac8b4c | 1122 | else if (funcs->atomic_disable) |
351f950d | 1123 | funcs->atomic_disable(crtc, old_state); |
623369e5 DV |
1124 | else if (funcs->disable) |
1125 | funcs->disable(crtc); | |
fe616928 | 1126 | else if (funcs->dpms) |
623369e5 | 1127 | funcs->dpms(crtc, DRM_MODE_DPMS_OFF); |
84014b0a | 1128 | |
6015002e | 1129 | if (!drm_dev_has_vblank(dev)) |
84014b0a DV |
1130 | continue; |
1131 | ||
1132 | ret = drm_crtc_vblank_get(crtc); | |
1133 | WARN_ONCE(ret != -EINVAL, "driver forgot to call drm_crtc_vblank_off()\n"); | |
1134 | if (ret == 0) | |
1135 | drm_crtc_vblank_put(crtc); | |
623369e5 DV |
1136 | } |
1137 | } | |
1138 | ||
4c18d301 DV |
1139 | /** |
1140 | * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state | |
1141 | * @dev: DRM device | |
1142 | * @old_state: atomic state object with old state structures | |
1143 | * | |
1144 | * This function updates all the various legacy modeset state pointers in | |
441959eb | 1145 | * connectors, encoders and CRTCs. |
4c18d301 DV |
1146 | * |
1147 | * Drivers can use this for building their own atomic commit if they don't have | |
1148 | * a pure helper-based modeset implementation. | |
2e2b96ef DV |
1149 | * |
1150 | * Since these updates are not synchronized with lockings, only code paths | |
1151 | * called from &drm_mode_config_helper_funcs.atomic_commit_tail can look at the | |
1152 | * legacy state filled out by this helper. Defacto this means this helper and | |
1153 | * the legacy state pointers are only really useful for transitioning an | |
1154 | * existing driver to the atomic world. | |
4c18d301 DV |
1155 | */ |
1156 | void | |
1157 | drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev, | |
1158 | struct drm_atomic_state *old_state) | |
623369e5 | 1159 | { |
df63b999 | 1160 | struct drm_connector *connector; |
415c3ac3 | 1161 | struct drm_connector_state *old_conn_state, *new_conn_state; |
df63b999 | 1162 | struct drm_crtc *crtc; |
415c3ac3 | 1163 | struct drm_crtc_state *new_crtc_state; |
623369e5 DV |
1164 | int i; |
1165 | ||
8c10342c | 1166 | /* clear out existing links and update dpms */ |
415c3ac3 | 1167 | for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) { |
8c10342c ML |
1168 | if (connector->encoder) { |
1169 | WARN_ON(!connector->encoder->crtc); | |
1170 | ||
1171 | connector->encoder->crtc = NULL; | |
1172 | connector->encoder = NULL; | |
1173 | } | |
623369e5 | 1174 | |
415c3ac3 | 1175 | crtc = new_conn_state->crtc; |
8c10342c ML |
1176 | if ((!crtc && old_conn_state->crtc) || |
1177 | (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) { | |
8c10342c | 1178 | int mode = DRM_MODE_DPMS_OFF; |
623369e5 | 1179 | |
8c10342c ML |
1180 | if (crtc && crtc->state->active) |
1181 | mode = DRM_MODE_DPMS_ON; | |
1182 | ||
1183 | connector->dpms = mode; | |
8c10342c | 1184 | } |
623369e5 DV |
1185 | } |
1186 | ||
1187 | /* set new links */ | |
415c3ac3 ML |
1188 | for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { |
1189 | if (!new_conn_state->crtc) | |
623369e5 DV |
1190 | continue; |
1191 | ||
415c3ac3 | 1192 | if (WARN_ON(!new_conn_state->best_encoder)) |
623369e5 DV |
1193 | continue; |
1194 | ||
415c3ac3 ML |
1195 | connector->encoder = new_conn_state->best_encoder; |
1196 | connector->encoder->crtc = new_conn_state->crtc; | |
623369e5 DV |
1197 | } |
1198 | ||
1199 | /* set legacy state in the crtc structure */ | |
415c3ac3 | 1200 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { |
2660801f | 1201 | struct drm_plane *primary = crtc->primary; |
b4d93679 | 1202 | struct drm_plane_state *new_plane_state; |
2660801f | 1203 | |
415c3ac3 ML |
1204 | crtc->mode = new_crtc_state->mode; |
1205 | crtc->enabled = new_crtc_state->enable; | |
2660801f | 1206 | |
b4d93679 ML |
1207 | new_plane_state = |
1208 | drm_atomic_get_new_plane_state(old_state, primary); | |
1209 | ||
1210 | if (new_plane_state && new_plane_state->crtc == crtc) { | |
1211 | crtc->x = new_plane_state->src_x >> 16; | |
1212 | crtc->y = new_plane_state->src_y >> 16; | |
2660801f | 1213 | } |
4b31a9c7 | 1214 | } |
4b31a9c7 VS |
1215 | } |
1216 | EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state); | |
1217 | ||
1218 | /** | |
1219 | * drm_atomic_helper_calc_timestamping_constants - update vblank timestamping constants | |
1220 | * @state: atomic state object | |
1221 | * | |
1222 | * Updates the timestamping constants used for precise vblank timestamps | |
1223 | * by calling drm_calc_timestamping_constants() for all enabled crtcs in @state. | |
1224 | */ | |
1225 | void drm_atomic_helper_calc_timestamping_constants(struct drm_atomic_state *state) | |
1226 | { | |
1227 | struct drm_crtc_state *new_crtc_state; | |
1228 | struct drm_crtc *crtc; | |
1229 | int i; | |
3d51d2d2 | 1230 | |
4b31a9c7 | 1231 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
415c3ac3 | 1232 | if (new_crtc_state->enable) |
3d51d2d2 | 1233 | drm_calc_timestamping_constants(crtc, |
415c3ac3 | 1234 | &new_crtc_state->adjusted_mode); |
623369e5 DV |
1235 | } |
1236 | } | |
4b31a9c7 | 1237 | EXPORT_SYMBOL(drm_atomic_helper_calc_timestamping_constants); |
623369e5 DV |
1238 | |
1239 | static void | |
1240 | crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state) | |
1241 | { | |
df63b999 | 1242 | struct drm_crtc *crtc; |
415c3ac3 | 1243 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 1244 | struct drm_connector *connector; |
415c3ac3 | 1245 | struct drm_connector_state *new_conn_state; |
623369e5 DV |
1246 | int i; |
1247 | ||
415c3ac3 | 1248 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { |
b5ceff20 | 1249 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 | 1250 | |
415c3ac3 | 1251 | if (!new_crtc_state->mode_changed) |
623369e5 DV |
1252 | continue; |
1253 | ||
1254 | funcs = crtc->helper_private; | |
1255 | ||
415c3ac3 | 1256 | if (new_crtc_state->enable && funcs->mode_set_nofb) { |
6e22dc35 CS |
1257 | drm_dbg_atomic(dev, "modeset on [CRTC:%d:%s]\n", |
1258 | crtc->base.id, crtc->name); | |
95d6eb3b | 1259 | |
623369e5 | 1260 | funcs->mode_set_nofb(crtc); |
95d6eb3b | 1261 | } |
623369e5 DV |
1262 | } |
1263 | ||
415c3ac3 | 1264 | for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { |
b5ceff20 | 1265 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 DV |
1266 | struct drm_encoder *encoder; |
1267 | struct drm_display_mode *mode, *adjusted_mode; | |
35a61fe9 | 1268 | struct drm_bridge *bridge; |
623369e5 | 1269 | |
415c3ac3 | 1270 | if (!new_conn_state->best_encoder) |
623369e5 DV |
1271 | continue; |
1272 | ||
415c3ac3 | 1273 | encoder = new_conn_state->best_encoder; |
623369e5 | 1274 | funcs = encoder->helper_private; |
415c3ac3 | 1275 | new_crtc_state = new_conn_state->crtc->state; |
623369e5 DV |
1276 | mode = &new_crtc_state->mode; |
1277 | adjusted_mode = &new_crtc_state->adjusted_mode; | |
1278 | ||
eab3bbef DV |
1279 | if (!new_crtc_state->mode_changed) |
1280 | continue; | |
1281 | ||
6e22dc35 CS |
1282 | drm_dbg_atomic(dev, "modeset on [ENCODER:%d:%s]\n", |
1283 | encoder->base.id, encoder->name); | |
95d6eb3b | 1284 | |
623369e5 DV |
1285 | /* |
1286 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 1287 | * it away), so we won't call mode_set hooks twice. |
623369e5 | 1288 | */ |
fe4a11c9 PZ |
1289 | if (funcs && funcs->atomic_mode_set) { |
1290 | funcs->atomic_mode_set(encoder, new_crtc_state, | |
415c3ac3 | 1291 | new_conn_state); |
fe4a11c9 | 1292 | } else if (funcs && funcs->mode_set) { |
c982bd90 | 1293 | funcs->mode_set(encoder, mode, adjusted_mode); |
fe4a11c9 | 1294 | } |
623369e5 | 1295 | |
35a61fe9 BB |
1296 | bridge = drm_bridge_chain_get_first_bridge(encoder); |
1297 | drm_bridge_chain_mode_set(bridge, mode, adjusted_mode); | |
623369e5 DV |
1298 | } |
1299 | } | |
1300 | ||
1301 | /** | |
1af434a9 | 1302 | * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs |
623369e5 | 1303 | * @dev: DRM device |
a072f809 | 1304 | * @old_state: atomic state object with old state structures |
623369e5 | 1305 | * |
1af434a9 | 1306 | * This function shuts down all the outputs that need to be shut down and |
623369e5 | 1307 | * prepares them (if required) with the new mode. |
1af434a9 | 1308 | * |
42240c90 | 1309 | * For compatibility with legacy CRTC helpers this should be called before |
1af434a9 DV |
1310 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
1311 | * does. But drivers with different needs can group the modeset commits together | |
1312 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
1313 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 1314 | */ |
1af434a9 DV |
1315 | void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev, |
1316 | struct drm_atomic_state *old_state) | |
623369e5 | 1317 | { |
a072f809 | 1318 | disable_outputs(dev, old_state); |
4c18d301 DV |
1319 | |
1320 | drm_atomic_helper_update_legacy_modeset_state(dev, old_state); | |
441959eb | 1321 | drm_atomic_helper_calc_timestamping_constants(old_state); |
4c18d301 | 1322 | |
a072f809 | 1323 | crtc_set_mode(dev, old_state); |
623369e5 | 1324 | } |
1af434a9 | 1325 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables); |
623369e5 | 1326 | |
935774cd BS |
1327 | static void drm_atomic_helper_commit_writebacks(struct drm_device *dev, |
1328 | struct drm_atomic_state *old_state) | |
1329 | { | |
1330 | struct drm_connector *connector; | |
1331 | struct drm_connector_state *new_conn_state; | |
1332 | int i; | |
1333 | ||
1334 | for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { | |
1335 | const struct drm_connector_helper_funcs *funcs; | |
1336 | ||
1337 | funcs = connector->helper_private; | |
814bde99 BB |
1338 | if (!funcs->atomic_commit) |
1339 | continue; | |
935774cd BS |
1340 | |
1341 | if (new_conn_state->writeback_job && new_conn_state->writeback_job->fb) { | |
1342 | WARN_ON(connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK); | |
eca22edb | 1343 | funcs->atomic_commit(connector, old_state); |
935774cd BS |
1344 | } |
1345 | } | |
1346 | } | |
1347 | ||
623369e5 | 1348 | /** |
1af434a9 | 1349 | * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs |
623369e5 DV |
1350 | * @dev: DRM device |
1351 | * @old_state: atomic state object with old state structures | |
1352 | * | |
1af434a9 DV |
1353 | * This function enables all the outputs with the new configuration which had to |
1354 | * be turned off for the update. | |
1355 | * | |
42240c90 | 1356 | * For compatibility with legacy CRTC helpers this should be called after |
1af434a9 DV |
1357 | * drm_atomic_helper_commit_planes(), which is what the default commit function |
1358 | * does. But drivers with different needs can group the modeset commits together | |
1359 | * and do the plane commits at the end. This is useful for drivers doing runtime | |
1360 | * PM since planes updates then only happen when the CRTC is actually enabled. | |
623369e5 | 1361 | */ |
1af434a9 DV |
1362 | void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev, |
1363 | struct drm_atomic_state *old_state) | |
623369e5 | 1364 | { |
df63b999 | 1365 | struct drm_crtc *crtc; |
0b20a0f8 | 1366 | struct drm_crtc_state *old_crtc_state; |
415c3ac3 | 1367 | struct drm_crtc_state *new_crtc_state; |
df63b999 | 1368 | struct drm_connector *connector; |
415c3ac3 | 1369 | struct drm_connector_state *new_conn_state; |
623369e5 DV |
1370 | int i; |
1371 | ||
0b20a0f8 | 1372 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
b5ceff20 | 1373 | const struct drm_crtc_helper_funcs *funcs; |
623369e5 DV |
1374 | |
1375 | /* Need to filter out CRTCs where only planes change. */ | |
415c3ac3 | 1376 | if (!drm_atomic_crtc_needs_modeset(new_crtc_state)) |
eab3bbef DV |
1377 | continue; |
1378 | ||
415c3ac3 | 1379 | if (!new_crtc_state->active) |
623369e5 DV |
1380 | continue; |
1381 | ||
1382 | funcs = crtc->helper_private; | |
1383 | ||
415c3ac3 | 1384 | if (new_crtc_state->enable) { |
6e22dc35 CS |
1385 | drm_dbg_atomic(dev, "enabling [CRTC:%d:%s]\n", |
1386 | crtc->base.id, crtc->name); | |
0b20a0f8 | 1387 | if (funcs->atomic_enable) |
351f950d | 1388 | funcs->atomic_enable(crtc, old_state); |
fe616928 | 1389 | else if (funcs->commit) |
ee0a89cf DV |
1390 | funcs->commit(crtc); |
1391 | } | |
623369e5 DV |
1392 | } |
1393 | ||
415c3ac3 | 1394 | for_each_new_connector_in_state(old_state, connector, new_conn_state, i) { |
b5ceff20 | 1395 | const struct drm_encoder_helper_funcs *funcs; |
623369e5 | 1396 | struct drm_encoder *encoder; |
35a61fe9 | 1397 | struct drm_bridge *bridge; |
623369e5 | 1398 | |
415c3ac3 | 1399 | if (!new_conn_state->best_encoder) |
623369e5 DV |
1400 | continue; |
1401 | ||
415c3ac3 ML |
1402 | if (!new_conn_state->crtc->state->active || |
1403 | !drm_atomic_crtc_needs_modeset(new_conn_state->crtc->state)) | |
eab3bbef DV |
1404 | continue; |
1405 | ||
415c3ac3 | 1406 | encoder = new_conn_state->best_encoder; |
623369e5 DV |
1407 | funcs = encoder->helper_private; |
1408 | ||
6e22dc35 CS |
1409 | drm_dbg_atomic(dev, "enabling [ENCODER:%d:%s]\n", |
1410 | encoder->base.id, encoder->name); | |
95d6eb3b | 1411 | |
623369e5 DV |
1412 | /* |
1413 | * Each encoder has at most one connector (since we always steal | |
f98bd3ef | 1414 | * it away), so we won't call enable hooks twice. |
623369e5 | 1415 | */ |
35a61fe9 BB |
1416 | bridge = drm_bridge_chain_get_first_bridge(encoder); |
1417 | drm_atomic_bridge_chain_pre_enable(bridge, old_state); | |
623369e5 | 1418 | |
2827635e | 1419 | if (funcs) { |
43c76d72 SP |
1420 | if (funcs->atomic_enable) |
1421 | funcs->atomic_enable(encoder, old_state); | |
1422 | else if (funcs->enable) | |
2827635e NT |
1423 | funcs->enable(encoder); |
1424 | else if (funcs->commit) | |
1425 | funcs->commit(encoder); | |
1426 | } | |
623369e5 | 1427 | |
35a61fe9 | 1428 | drm_atomic_bridge_chain_enable(bridge, old_state); |
623369e5 | 1429 | } |
935774cd BS |
1430 | |
1431 | drm_atomic_helper_commit_writebacks(dev, old_state); | |
623369e5 | 1432 | } |
1af434a9 | 1433 | EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables); |
623369e5 | 1434 | |
4c5b7f3a RC |
1435 | /** |
1436 | * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state | |
1437 | * @dev: DRM device | |
1438 | * @state: atomic state object with old state structures | |
1ea0c02e | 1439 | * @pre_swap: If true, do an interruptible wait, and @state is the new state. |
1758f403 | 1440 | * Otherwise @state is the old state. |
4c5b7f3a RC |
1441 | * |
1442 | * For implicit sync, driver should fish the exclusive fence out from the | |
1443 | * incoming fb's and stash it in the drm_plane_state. This is called after | |
1444 | * drm_atomic_helper_swap_state() so it uses the current plane state (and | |
1445 | * just uses the atomic state to find the changed planes) | |
f6ce410a | 1446 | * |
1ea0c02e DV |
1447 | * Note that @pre_swap is needed since the point where we block for fences moves |
1448 | * around depending upon whether an atomic commit is blocking or | |
42590372 GP |
1449 | * non-blocking. For non-blocking commit all waiting needs to happen after |
1450 | * drm_atomic_helper_swap_state() is called, but for blocking commits we want | |
1ea0c02e DV |
1451 | * to wait **before** we do anything that can't be easily rolled back. That is |
1452 | * before we call drm_atomic_helper_swap_state(). | |
1453 | * | |
f54d1867 | 1454 | * Returns zero if success or < 0 if dma_fence_wait() fails. |
4c5b7f3a | 1455 | */ |
f6ce410a GP |
1456 | int drm_atomic_helper_wait_for_fences(struct drm_device *dev, |
1457 | struct drm_atomic_state *state, | |
1458 | bool pre_swap) | |
e2330f07 | 1459 | { |
df63b999 | 1460 | struct drm_plane *plane; |
415c3ac3 | 1461 | struct drm_plane_state *new_plane_state; |
f6ce410a | 1462 | int i, ret; |
e2330f07 | 1463 | |
415c3ac3 ML |
1464 | for_each_new_plane_in_state(state, plane, new_plane_state, i) { |
1465 | if (!new_plane_state->fence) | |
e2330f07 DV |
1466 | continue; |
1467 | ||
415c3ac3 | 1468 | WARN_ON(!new_plane_state->fb); |
f6ce410a GP |
1469 | |
1470 | /* | |
1471 | * If waiting for fences pre-swap (ie: nonblock), userspace can | |
1472 | * still interrupt the operation. Instead of blocking until the | |
1473 | * timer expires, make the wait interruptible. | |
1474 | */ | |
415c3ac3 | 1475 | ret = dma_fence_wait(new_plane_state->fence, pre_swap); |
f6ce410a GP |
1476 | if (ret) |
1477 | return ret; | |
e2330f07 | 1478 | |
415c3ac3 ML |
1479 | dma_fence_put(new_plane_state->fence); |
1480 | new_plane_state->fence = NULL; | |
e2330f07 | 1481 | } |
f6ce410a GP |
1482 | |
1483 | return 0; | |
e2330f07 | 1484 | } |
4c5b7f3a | 1485 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences); |
e2330f07 | 1486 | |
5ee3229c | 1487 | /** |
42240c90 | 1488 | * drm_atomic_helper_wait_for_vblanks - wait for vblank on CRTCs |
5ee3229c RC |
1489 | * @dev: DRM device |
1490 | * @old_state: atomic state object with old state structures | |
1491 | * | |
dbe2d2bf | 1492 | * Helper to, after atomic commit, wait for vblanks on all affected |
42240c90 | 1493 | * CRTCs (ie. before cleaning up old framebuffers using |
01086487 | 1494 | * drm_atomic_helper_cleanup_planes()). It will only wait on CRTCs where the |
ab58e338 DV |
1495 | * framebuffers have actually changed to optimize for the legacy cursor and |
1496 | * plane update use-case. | |
01086487 BB |
1497 | * |
1498 | * Drivers using the nonblocking commit tracking support initialized by calling | |
1499 | * drm_atomic_helper_setup_commit() should look at | |
1500 | * drm_atomic_helper_wait_for_flip_done() as an alternative. | |
5ee3229c RC |
1501 | */ |
1502 | void | |
1503 | drm_atomic_helper_wait_for_vblanks(struct drm_device *dev, | |
1504 | struct drm_atomic_state *old_state) | |
623369e5 DV |
1505 | { |
1506 | struct drm_crtc *crtc; | |
415c3ac3 | 1507 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
623369e5 | 1508 | int i, ret; |
9237ec1f | 1509 | unsigned int crtc_mask = 0; |
623369e5 | 1510 | |
bdc57146 ML |
1511 | /* |
1512 | * Legacy cursor ioctls are completely unsynced, and userspace | |
1513 | * relies on that (by doing tons of cursor updates). | |
1514 | */ | |
1515 | if (old_state->legacy_cursor_update) | |
1516 | return; | |
623369e5 | 1517 | |
415c3ac3 | 1518 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
a76dfe35 | 1519 | if (!new_crtc_state->active) |
ab58e338 DV |
1520 | continue; |
1521 | ||
623369e5 DV |
1522 | ret = drm_crtc_vblank_get(crtc); |
1523 | if (ret != 0) | |
1524 | continue; | |
1525 | ||
bdc57146 ML |
1526 | crtc_mask |= drm_crtc_mask(crtc); |
1527 | old_state->crtcs[i].last_vblank_count = drm_crtc_vblank_count(crtc); | |
623369e5 DV |
1528 | } |
1529 | ||
415c3ac3 | 1530 | for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
bdc57146 | 1531 | if (!(crtc_mask & drm_crtc_mask(crtc))) |
623369e5 DV |
1532 | continue; |
1533 | ||
1534 | ret = wait_event_timeout(dev->vblank[i].queue, | |
bdc57146 | 1535 | old_state->crtcs[i].last_vblank_count != |
d4853630 | 1536 | drm_crtc_vblank_count(crtc), |
b3198c38 | 1537 | msecs_to_jiffies(100)); |
623369e5 | 1538 | |
6ac7c548 RK |
1539 | WARN(!ret, "[CRTC:%d:%s] vblank wait timed out\n", |
1540 | crtc->base.id, crtc->name); | |
8d4d0d70 | 1541 | |
623369e5 DV |
1542 | drm_crtc_vblank_put(crtc); |
1543 | } | |
1544 | } | |
5ee3229c | 1545 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks); |
623369e5 | 1546 | |
01086487 BB |
1547 | /** |
1548 | * drm_atomic_helper_wait_for_flip_done - wait for all page flips to be done | |
1549 | * @dev: DRM device | |
1550 | * @old_state: atomic state object with old state structures | |
1551 | * | |
dbe2d2bf | 1552 | * Helper to, after atomic commit, wait for page flips on all affected |
01086487 BB |
1553 | * crtcs (ie. before cleaning up old framebuffers using |
1554 | * drm_atomic_helper_cleanup_planes()). Compared to | |
dbe2d2bf | 1555 | * drm_atomic_helper_wait_for_vblanks() this waits for the completion on all |
01086487 BB |
1556 | * CRTCs, assuming that cursors-only updates are signalling their completion |
1557 | * immediately (or using a different path). | |
1558 | * | |
1559 | * This requires that drivers use the nonblocking commit tracking support | |
1560 | * initialized using drm_atomic_helper_setup_commit(). | |
1561 | */ | |
1562 | void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev, | |
1563 | struct drm_atomic_state *old_state) | |
1564 | { | |
01086487 BB |
1565 | struct drm_crtc *crtc; |
1566 | int i; | |
1567 | ||
4364bcb2 LL |
1568 | for (i = 0; i < dev->mode_config.num_crtc; i++) { |
1569 | struct drm_crtc_commit *commit = old_state->crtcs[i].commit; | |
01086487 BB |
1570 | int ret; |
1571 | ||
4364bcb2 LL |
1572 | crtc = old_state->crtcs[i].ptr; |
1573 | ||
1574 | if (!crtc || !commit) | |
01086487 BB |
1575 | continue; |
1576 | ||
1577 | ret = wait_for_completion_timeout(&commit->flip_done, 10 * HZ); | |
1578 | if (ret == 0) | |
6e22dc35 CS |
1579 | drm_err(dev, "[CRTC:%d:%s] flip_done timed out\n", |
1580 | crtc->base.id, crtc->name); | |
01086487 | 1581 | } |
2de42f79 VS |
1582 | |
1583 | if (old_state->fake_commit) | |
1584 | complete_all(&old_state->fake_commit->flip_done); | |
01086487 BB |
1585 | } |
1586 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_flip_done); | |
1587 | ||
623369e5 | 1588 | /** |
9f2a7950 | 1589 | * drm_atomic_helper_commit_tail - commit atomic update to hardware |
1ea0c02e | 1590 | * @old_state: atomic state object with old state structures |
623369e5 | 1591 | * |
6806cdf9 | 1592 | * This is the default implementation for the |
81a099ac MR |
1593 | * &drm_mode_config_helper_funcs.atomic_commit_tail hook, for drivers |
1594 | * that do not support runtime_pm or do not need the CRTC to be | |
1595 | * enabled to perform a commit. Otherwise, see | |
1596 | * drm_atomic_helper_commit_tail_rpm(). | |
623369e5 | 1597 | * |
9f2a7950 | 1598 | * Note that the default ordering of how the various stages are called is to |
81a099ac | 1599 | * match the legacy modeset helper library closest. |
9f2a7950 | 1600 | */ |
1ea0c02e | 1601 | void drm_atomic_helper_commit_tail(struct drm_atomic_state *old_state) |
9f2a7950 | 1602 | { |
1ea0c02e | 1603 | struct drm_device *dev = old_state->dev; |
9f2a7950 | 1604 | |
1ea0c02e | 1605 | drm_atomic_helper_commit_modeset_disables(dev, old_state); |
9f2a7950 | 1606 | |
1ea0c02e | 1607 | drm_atomic_helper_commit_planes(dev, old_state, 0); |
9f2a7950 | 1608 | |
1ea0c02e | 1609 | drm_atomic_helper_commit_modeset_enables(dev, old_state); |
9f2a7950 | 1610 | |
6fb42b66 BB |
1611 | drm_atomic_helper_fake_vblank(old_state); |
1612 | ||
1ea0c02e | 1613 | drm_atomic_helper_commit_hw_done(old_state); |
9f2a7950 | 1614 | |
1ea0c02e | 1615 | drm_atomic_helper_wait_for_vblanks(dev, old_state); |
9f2a7950 | 1616 | |
1ea0c02e | 1617 | drm_atomic_helper_cleanup_planes(dev, old_state); |
9f2a7950 DV |
1618 | } |
1619 | EXPORT_SYMBOL(drm_atomic_helper_commit_tail); | |
1620 | ||
81a099ac MR |
1621 | /** |
1622 | * drm_atomic_helper_commit_tail_rpm - commit atomic update to hardware | |
1623 | * @old_state: new modeset state to be committed | |
1624 | * | |
1625 | * This is an alternative implementation for the | |
1626 | * &drm_mode_config_helper_funcs.atomic_commit_tail hook, for drivers | |
1627 | * that support runtime_pm or need the CRTC to be enabled to perform a | |
1628 | * commit. Otherwise, one should use the default implementation | |
1629 | * drm_atomic_helper_commit_tail(). | |
1630 | */ | |
1631 | void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_state *old_state) | |
1632 | { | |
1633 | struct drm_device *dev = old_state->dev; | |
1634 | ||
1635 | drm_atomic_helper_commit_modeset_disables(dev, old_state); | |
1636 | ||
1637 | drm_atomic_helper_commit_modeset_enables(dev, old_state); | |
1638 | ||
1639 | drm_atomic_helper_commit_planes(dev, old_state, | |
1640 | DRM_PLANE_COMMIT_ACTIVE_ONLY); | |
1641 | ||
6fb42b66 BB |
1642 | drm_atomic_helper_fake_vblank(old_state); |
1643 | ||
81a099ac MR |
1644 | drm_atomic_helper_commit_hw_done(old_state); |
1645 | ||
1646 | drm_atomic_helper_wait_for_vblanks(dev, old_state); | |
1647 | ||
1648 | drm_atomic_helper_cleanup_planes(dev, old_state); | |
1649 | } | |
1650 | EXPORT_SYMBOL(drm_atomic_helper_commit_tail_rpm); | |
1651 | ||
1ea0c02e | 1652 | static void commit_tail(struct drm_atomic_state *old_state) |
9f2a7950 | 1653 | { |
1ea0c02e | 1654 | struct drm_device *dev = old_state->dev; |
a4b10cce | 1655 | const struct drm_mode_config_helper_funcs *funcs; |
86de88cf RC |
1656 | struct drm_crtc_state *new_crtc_state; |
1657 | struct drm_crtc *crtc; | |
d4da4e33 SP |
1658 | ktime_t start; |
1659 | s64 commit_time_ms; | |
86de88cf | 1660 | unsigned int i, new_self_refresh_mask = 0; |
9f2a7950 DV |
1661 | |
1662 | funcs = dev->mode_config.helper_private; | |
1663 | ||
d4da4e33 SP |
1664 | /* |
1665 | * We're measuring the _entire_ commit, so the time will vary depending | |
1666 | * on how many fences and objects are involved. For the purposes of self | |
1667 | * refresh, this is desirable since it'll give us an idea of how | |
1668 | * congested things are. This will inform our decision on how often we | |
1669 | * should enter self refresh after idle. | |
1670 | * | |
1671 | * These times will be averaged out in the self refresh helpers to avoid | |
1672 | * overreacting over one outlier frame | |
1673 | */ | |
1674 | start = ktime_get(); | |
1675 | ||
1ea0c02e | 1676 | drm_atomic_helper_wait_for_fences(dev, old_state, false); |
9f2a7950 | 1677 | |
1ea0c02e | 1678 | drm_atomic_helper_wait_for_dependencies(old_state); |
9f2a7950 | 1679 | |
86de88cf RC |
1680 | /* |
1681 | * We cannot safely access new_crtc_state after | |
1682 | * drm_atomic_helper_commit_hw_done() so figure out which crtc's have | |
1683 | * self-refresh active beforehand: | |
1684 | */ | |
1685 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) | |
1686 | if (new_crtc_state->self_refresh_active) | |
1687 | new_self_refresh_mask |= BIT(i); | |
1688 | ||
9f2a7950 | 1689 | if (funcs && funcs->atomic_commit_tail) |
1ea0c02e | 1690 | funcs->atomic_commit_tail(old_state); |
9f2a7950 | 1691 | else |
1ea0c02e | 1692 | drm_atomic_helper_commit_tail(old_state); |
9f2a7950 | 1693 | |
d4da4e33 SP |
1694 | commit_time_ms = ktime_ms_delta(ktime_get(), start); |
1695 | if (commit_time_ms > 0) | |
1696 | drm_self_refresh_helper_update_avg_times(old_state, | |
86de88cf RC |
1697 | (unsigned long)commit_time_ms, |
1698 | new_self_refresh_mask); | |
d4da4e33 | 1699 | |
1ea0c02e | 1700 | drm_atomic_helper_commit_cleanup_done(old_state); |
9f2a7950 | 1701 | |
1ea0c02e | 1702 | drm_atomic_state_put(old_state); |
9f2a7950 DV |
1703 | } |
1704 | ||
1705 | static void commit_work(struct work_struct *work) | |
1706 | { | |
1707 | struct drm_atomic_state *state = container_of(work, | |
1708 | struct drm_atomic_state, | |
1709 | commit_work); | |
1710 | commit_tail(state); | |
1711 | } | |
1712 | ||
fef9df8b | 1713 | /** |
0ae865ef | 1714 | * drm_atomic_helper_async_check - check if state can be committed asynchronously |
fef9df8b GP |
1715 | * @dev: DRM device |
1716 | * @state: the driver state object | |
1717 | * | |
1718 | * This helper will check if it is possible to commit the state asynchronously. | |
1719 | * Async commits are not supposed to swap the states like normal sync commits | |
1720 | * but just do in-place changes on the current state. | |
1721 | * | |
1722 | * It will return 0 if the commit can happen in an asynchronous fashion or error | |
0ae865ef | 1723 | * if not. Note that error just mean it can't be committed asynchronously, if it |
fef9df8b GP |
1724 | * fails the commit should be treated like a normal synchronous commit. |
1725 | */ | |
1726 | int drm_atomic_helper_async_check(struct drm_device *dev, | |
1727 | struct drm_atomic_state *state) | |
1728 | { | |
1729 | struct drm_crtc *crtc; | |
1730 | struct drm_crtc_state *crtc_state; | |
de2d8db3 BB |
1731 | struct drm_plane *plane = NULL; |
1732 | struct drm_plane_state *old_plane_state = NULL; | |
1733 | struct drm_plane_state *new_plane_state = NULL; | |
fef9df8b | 1734 | const struct drm_plane_helper_funcs *funcs; |
669c9215 | 1735 | int i, n_planes = 0; |
fef9df8b GP |
1736 | |
1737 | for_each_new_crtc_in_state(state, crtc, crtc_state, i) { | |
1738 | if (drm_atomic_crtc_needs_modeset(crtc_state)) | |
1739 | return -EINVAL; | |
1740 | } | |
1741 | ||
669c9215 | 1742 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) |
fef9df8b | 1743 | n_planes++; |
fef9df8b GP |
1744 | |
1745 | /* FIXME: we support only single plane updates for now */ | |
669c9215 | 1746 | if (n_planes != 1) |
fef9df8b GP |
1747 | return -EINVAL; |
1748 | ||
603ba2df BB |
1749 | if (!new_plane_state->crtc || |
1750 | old_plane_state->crtc != new_plane_state->crtc) | |
fef9df8b GP |
1751 | return -EINVAL; |
1752 | ||
1753 | funcs = plane->helper_private; | |
1754 | if (!funcs->atomic_async_update) | |
1755 | return -EINVAL; | |
1756 | ||
669c9215 | 1757 | if (new_plane_state->fence) |
fef9df8b GP |
1758 | return -EINVAL; |
1759 | ||
1760 | /* | |
1761 | * Don't do an async update if there is an outstanding commit modifying | |
1762 | * the plane. This prevents our async update's changes from getting | |
1763 | * overridden by a previous synchronous update's state. | |
1764 | */ | |
669c9215 | 1765 | if (old_plane_state->commit && |
9073d4ed | 1766 | !try_wait_for_completion(&old_plane_state->commit->hw_done)) { |
6e22dc35 CS |
1767 | drm_dbg_atomic(dev, |
1768 | "[PLANE:%d:%s] inflight previous commit preventing async commit\n", | |
1769 | plane->base.id, plane->name); | |
669c9215 | 1770 | return -EBUSY; |
9073d4ed | 1771 | } |
fef9df8b | 1772 | |
5ddb0bd4 | 1773 | return funcs->atomic_async_check(plane, state); |
fef9df8b GP |
1774 | } |
1775 | EXPORT_SYMBOL(drm_atomic_helper_async_check); | |
1776 | ||
1777 | /** | |
1778 | * drm_atomic_helper_async_commit - commit state asynchronously | |
1779 | * @dev: DRM device | |
1780 | * @state: the driver state object | |
1781 | * | |
1782 | * This function commits a state asynchronously, i.e., not vblank | |
1783 | * synchronized. It should be used on a state only when | |
1784 | * drm_atomic_async_check() succeeds. Async commits are not supposed to swap | |
1785 | * the states like normal sync commits, but just do in-place changes on the | |
1786 | * current state. | |
89a4aac0 HK |
1787 | * |
1788 | * TODO: Implement full swap instead of doing in-place changes. | |
fef9df8b GP |
1789 | */ |
1790 | void drm_atomic_helper_async_commit(struct drm_device *dev, | |
1791 | struct drm_atomic_state *state) | |
1792 | { | |
1793 | struct drm_plane *plane; | |
1794 | struct drm_plane_state *plane_state; | |
1795 | const struct drm_plane_helper_funcs *funcs; | |
1796 | int i; | |
1797 | ||
1798 | for_each_new_plane_in_state(state, plane, plane_state, i) { | |
89a4aac0 HK |
1799 | struct drm_framebuffer *new_fb = plane_state->fb; |
1800 | struct drm_framebuffer *old_fb = plane->state->fb; | |
1801 | ||
fef9df8b | 1802 | funcs = plane->helper_private; |
5ddb0bd4 | 1803 | funcs->atomic_async_update(plane, state); |
02edfd9c BB |
1804 | |
1805 | /* | |
1806 | * ->atomic_async_update() is supposed to update the | |
1807 | * plane->state in-place, make sure at least common | |
1808 | * properties have been properly updated. | |
1809 | */ | |
89a4aac0 | 1810 | WARN_ON_ONCE(plane->state->fb != new_fb); |
02edfd9c BB |
1811 | WARN_ON_ONCE(plane->state->crtc_x != plane_state->crtc_x); |
1812 | WARN_ON_ONCE(plane->state->crtc_y != plane_state->crtc_y); | |
1813 | WARN_ON_ONCE(plane->state->src_x != plane_state->src_x); | |
1814 | WARN_ON_ONCE(plane->state->src_y != plane_state->src_y); | |
89a4aac0 HK |
1815 | |
1816 | /* | |
1817 | * Make sure the FBs have been swapped so that cleanups in the | |
1818 | * new_state performs a cleanup in the old FB. | |
1819 | */ | |
1820 | WARN_ON_ONCE(plane_state->fb != old_fb); | |
fef9df8b GP |
1821 | } |
1822 | } | |
1823 | EXPORT_SYMBOL(drm_atomic_helper_async_commit); | |
1824 | ||
9f2a7950 DV |
1825 | /** |
1826 | * drm_atomic_helper_commit - commit validated state object | |
1827 | * @dev: DRM device | |
1828 | * @state: the driver state object | |
1829 | * @nonblock: whether nonblocking behavior is requested. | |
1830 | * | |
1831 | * This function commits a with drm_atomic_helper_check() pre-validated state | |
1832 | * object. This can still fail when e.g. the framebuffer reservation fails. This | |
1833 | * function implements nonblocking commits, using | |
1834 | * drm_atomic_helper_setup_commit() and related functions. | |
1835 | * | |
9f2a7950 | 1836 | * Committing the actual hardware state is done through the |
1e55a53a | 1837 | * &drm_mode_config_helper_funcs.atomic_commit_tail callback, or its default |
6806cdf9 | 1838 | * implementation drm_atomic_helper_commit_tail(). |
6e48ae32 | 1839 | * |
c39032a8 | 1840 | * RETURNS: |
623369e5 DV |
1841 | * Zero for success or -errno. |
1842 | */ | |
1843 | int drm_atomic_helper_commit(struct drm_device *dev, | |
1844 | struct drm_atomic_state *state, | |
286dbb8d | 1845 | bool nonblock) |
623369e5 DV |
1846 | { |
1847 | int ret; | |
1848 | ||
fef9df8b GP |
1849 | if (state->async_update) { |
1850 | ret = drm_atomic_helper_prepare_planes(dev, state); | |
1851 | if (ret) | |
1852 | return ret; | |
1853 | ||
1854 | drm_atomic_helper_async_commit(dev, state); | |
1855 | drm_atomic_helper_cleanup_planes(dev, state); | |
1856 | ||
1857 | return 0; | |
1858 | } | |
1859 | ||
a095caa7 DV |
1860 | ret = drm_atomic_helper_setup_commit(state, nonblock); |
1861 | if (ret) | |
1862 | return ret; | |
1863 | ||
9f2a7950 DV |
1864 | INIT_WORK(&state->commit_work, commit_work); |
1865 | ||
623369e5 DV |
1866 | ret = drm_atomic_helper_prepare_planes(dev, state); |
1867 | if (ret) | |
1868 | return ret; | |
1869 | ||
f6ce410a GP |
1870 | if (!nonblock) { |
1871 | ret = drm_atomic_helper_wait_for_fences(dev, state, true); | |
c066d231 ML |
1872 | if (ret) |
1873 | goto err; | |
f6ce410a GP |
1874 | } |
1875 | ||
623369e5 DV |
1876 | /* |
1877 | * This is the point of no return - everything below never fails except | |
1878 | * when the hw goes bonghits. Which means we can commit the new state on | |
1879 | * the software side now. | |
1880 | */ | |
1881 | ||
c066d231 ML |
1882 | ret = drm_atomic_helper_swap_state(state, true); |
1883 | if (ret) | |
1884 | goto err; | |
623369e5 DV |
1885 | |
1886 | /* | |
1887 | * Everything below can be run asynchronously without the need to grab | |
f98bd3ef | 1888 | * any modeset locks at all under one condition: It must be guaranteed |
623369e5 DV |
1889 | * that the asynchronous work has either been cancelled (if the driver |
1890 | * supports it, which at least requires that the framebuffers get | |
1891 | * cleaned up with drm_atomic_helper_cleanup_planes()) or completed | |
1892 | * before the new state gets committed on the software side with | |
1893 | * drm_atomic_helper_swap_state(). | |
1894 | * | |
1895 | * This scheme allows new atomic state updates to be prepared and | |
1896 | * checked in parallel to the asynchronous completion of the previous | |
1897 | * update. Which is important since compositors need to figure out the | |
1898 | * composition of the next frame right after having submitted the | |
1899 | * current layout. | |
9f2a7950 DV |
1900 | * |
1901 | * NOTE: Commit work has multiple phases, first hardware commit, then | |
1902 | * cleanup. We want them to overlap, hence need system_unbound_wq to | |
a0689e34 | 1903 | * make sure work items don't artificially stall on each another. |
623369e5 DV |
1904 | */ |
1905 | ||
0853695c | 1906 | drm_atomic_state_get(state); |
9f2a7950 DV |
1907 | if (nonblock) |
1908 | queue_work(system_unbound_wq, &state->commit_work); | |
1909 | else | |
1910 | commit_tail(state); | |
623369e5 DV |
1911 | |
1912 | return 0; | |
c066d231 ML |
1913 | |
1914 | err: | |
1915 | drm_atomic_helper_cleanup_planes(dev, state); | |
1916 | return ret; | |
623369e5 DV |
1917 | } |
1918 | EXPORT_SYMBOL(drm_atomic_helper_commit); | |
1919 | ||
e8c833a7 | 1920 | /** |
286dbb8d | 1921 | * DOC: implementing nonblocking commit |
e8c833a7 | 1922 | * |
0380c684 DV |
1923 | * Nonblocking atomic commits should use struct &drm_crtc_commit to sequence |
1924 | * different operations against each another. Locks, especially struct | |
1925 | * &drm_modeset_lock, should not be held in worker threads or any other | |
1926 | * asynchronous context used to commit the hardware state. | |
e8c833a7 | 1927 | * |
0380c684 DV |
1928 | * drm_atomic_helper_commit() implements the recommended sequence for |
1929 | * nonblocking commits, using drm_atomic_helper_setup_commit() internally: | |
e8c833a7 | 1930 | * |
0380c684 DV |
1931 | * 1. Run drm_atomic_helper_prepare_planes(). Since this can fail and we |
1932 | * need to propagate out of memory/VRAM errors to userspace, it must be called | |
e8c833a7 DV |
1933 | * synchronously. |
1934 | * | |
286dbb8d | 1935 | * 2. Synchronize with any outstanding nonblocking commit worker threads which |
0380c684 DV |
1936 | * might be affected by the new state update. This is handled by |
1937 | * drm_atomic_helper_setup_commit(). | |
e8c833a7 | 1938 | * |
9f2a7950 DV |
1939 | * Asynchronous workers need to have sufficient parallelism to be able to run |
1940 | * different atomic commits on different CRTCs in parallel. The simplest way to | |
a0689e34 | 1941 | * achieve this is by running them on the &system_unbound_wq work queue. Note |
9f2a7950 DV |
1942 | * that drivers are not required to split up atomic commits and run an |
1943 | * individual commit in parallel - userspace is supposed to do that if it cares. | |
1944 | * But it might be beneficial to do that for modesets, since those necessarily | |
1945 | * must be done as one global operation, and enabling or disabling a CRTC can | |
1946 | * take a long time. But even that is not required. | |
e8c833a7 | 1947 | * |
0380c684 DV |
1948 | * IMPORTANT: A &drm_atomic_state update for multiple CRTCs is sequenced |
1949 | * against all CRTCs therein. Therefore for atomic state updates which only flip | |
1950 | * planes the driver must not get the struct &drm_crtc_state of unrelated CRTCs | |
1951 | * in its atomic check code: This would prevent committing of atomic updates to | |
1952 | * multiple CRTCs in parallel. In general, adding additional state structures | |
1953 | * should be avoided as much as possible, because this reduces parallelism in | |
1954 | * (nonblocking) commits, both due to locking and due to commit sequencing | |
1955 | * requirements. | |
1956 | * | |
e8c833a7 | 1957 | * 3. The software state is updated synchronously with |
26196f7e | 1958 | * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset |
0380c684 DV |
1959 | * locks means concurrent callers never see inconsistent state. Note that commit |
1960 | * workers do not hold any locks; their access is only coordinated through | |
1961 | * ordering. If workers would access state only through the pointers in the | |
1962 | * free-standing state objects (currently not the case for any driver) then even | |
1963 | * multiple pending commits could be in-flight at the same time. | |
e8c833a7 DV |
1964 | * |
1965 | * 4. Schedule a work item to do all subsequent steps, using the split-out | |
1966 | * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and | |
1967 | * then cleaning up the framebuffers after the old framebuffer is no longer | |
0380c684 DV |
1968 | * being displayed. The scheduled work should synchronize against other workers |
1969 | * using the &drm_crtc_commit infrastructure as needed. See | |
1970 | * drm_atomic_helper_setup_commit() for more details. | |
e8c833a7 DV |
1971 | */ |
1972 | ||
a095caa7 DV |
1973 | static int stall_checks(struct drm_crtc *crtc, bool nonblock) |
1974 | { | |
1975 | struct drm_crtc_commit *commit, *stall_commit = NULL; | |
1976 | bool completed = true; | |
1977 | int i; | |
1978 | long ret = 0; | |
1979 | ||
1980 | spin_lock(&crtc->commit_lock); | |
1981 | i = 0; | |
1982 | list_for_each_entry(commit, &crtc->commit_list, commit_entry) { | |
1983 | if (i == 0) { | |
1984 | completed = try_wait_for_completion(&commit->flip_done); | |
1758f403 FDF |
1985 | /* |
1986 | * Userspace is not allowed to get ahead of the previous | |
1987 | * commit with nonblocking ones. | |
1988 | */ | |
a095caa7 DV |
1989 | if (!completed && nonblock) { |
1990 | spin_unlock(&crtc->commit_lock); | |
6e22dc35 CS |
1991 | drm_dbg_atomic(crtc->dev, |
1992 | "[CRTC:%d:%s] busy with a previous commit\n", | |
1993 | crtc->base.id, crtc->name); | |
9073d4ed | 1994 | |
a095caa7 DV |
1995 | return -EBUSY; |
1996 | } | |
1997 | } else if (i == 1) { | |
f46640b9 | 1998 | stall_commit = drm_crtc_commit_get(commit); |
a095caa7 | 1999 | break; |
723c3e55 | 2000 | } |
a095caa7 DV |
2001 | |
2002 | i++; | |
2003 | } | |
2004 | spin_unlock(&crtc->commit_lock); | |
2005 | ||
2006 | if (!stall_commit) | |
2007 | return 0; | |
2008 | ||
2009 | /* We don't want to let commits get ahead of cleanup work too much, | |
2010 | * stalling on 2nd previous commit means triple-buffer won't ever stall. | |
2011 | */ | |
723c3e55 | 2012 | ret = wait_for_completion_interruptible_timeout(&stall_commit->cleanup_done, |
a095caa7 DV |
2013 | 10*HZ); |
2014 | if (ret == 0) | |
6e22dc35 CS |
2015 | drm_err(crtc->dev, "[CRTC:%d:%s] cleanup_done timed out\n", |
2016 | crtc->base.id, crtc->name); | |
a095caa7 DV |
2017 | |
2018 | drm_crtc_commit_put(stall_commit); | |
2019 | ||
2020 | return ret < 0 ? ret : 0; | |
2021 | } | |
2022 | ||
899cc5f1 | 2023 | static void release_crtc_commit(struct completion *completion) |
24835e44 DV |
2024 | { |
2025 | struct drm_crtc_commit *commit = container_of(completion, | |
2026 | typeof(*commit), | |
2027 | flip_done); | |
2028 | ||
2029 | drm_crtc_commit_put(commit); | |
2030 | } | |
2031 | ||
21a01abb ML |
2032 | static void init_commit(struct drm_crtc_commit *commit, struct drm_crtc *crtc) |
2033 | { | |
2034 | init_completion(&commit->flip_done); | |
2035 | init_completion(&commit->hw_done); | |
2036 | init_completion(&commit->cleanup_done); | |
2037 | INIT_LIST_HEAD(&commit->commit_entry); | |
2038 | kref_init(&commit->ref); | |
2039 | commit->crtc = crtc; | |
2040 | } | |
2041 | ||
2042 | static struct drm_crtc_commit * | |
2043 | crtc_or_fake_commit(struct drm_atomic_state *state, struct drm_crtc *crtc) | |
2044 | { | |
2045 | if (crtc) { | |
2046 | struct drm_crtc_state *new_crtc_state; | |
2047 | ||
2048 | new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc); | |
2049 | ||
2050 | return new_crtc_state->commit; | |
2051 | } | |
2052 | ||
2053 | if (!state->fake_commit) { | |
2054 | state->fake_commit = kzalloc(sizeof(*state->fake_commit), GFP_KERNEL); | |
2055 | if (!state->fake_commit) | |
2056 | return NULL; | |
2057 | ||
2058 | init_commit(state->fake_commit, NULL); | |
2059 | } | |
2060 | ||
2061 | return state->fake_commit; | |
2062 | } | |
2063 | ||
a095caa7 DV |
2064 | /** |
2065 | * drm_atomic_helper_setup_commit - setup possibly nonblocking commit | |
2066 | * @state: new modeset state to be committed | |
2067 | * @nonblock: whether nonblocking behavior is requested. | |
2068 | * | |
2069 | * This function prepares @state to be used by the atomic helper's support for | |
2070 | * nonblocking commits. Drivers using the nonblocking commit infrastructure | |
6806cdf9 DV |
2071 | * should always call this function from their |
2072 | * &drm_mode_config_funcs.atomic_commit hook. | |
a095caa7 | 2073 | * |
ddadd408 MR |
2074 | * Drivers that need to extend the commit setup to private objects can use the |
2075 | * &drm_mode_config_helper_funcs.atomic_commit_setup hook. | |
2076 | * | |
a095caa7 DV |
2077 | * To be able to use this support drivers need to use a few more helper |
2078 | * functions. drm_atomic_helper_wait_for_dependencies() must be called before | |
2079 | * actually committing the hardware state, and for nonblocking commits this call | |
2080 | * must be placed in the async worker. See also drm_atomic_helper_swap_state() | |
1e55a53a | 2081 | * and its stall parameter, for when a driver's commit hooks look at the |
6806cdf9 | 2082 | * &drm_crtc.state, &drm_plane.state or &drm_connector.state pointer directly. |
a095caa7 DV |
2083 | * |
2084 | * Completion of the hardware commit step must be signalled using | |
2085 | * drm_atomic_helper_commit_hw_done(). After this step the driver is not allowed | |
2086 | * to read or change any permanent software or hardware modeset state. The only | |
2087 | * exception is state protected by other means than &drm_modeset_lock locks. | |
2088 | * Only the free standing @state with pointers to the old state structures can | |
2089 | * be inspected, e.g. to clean up old buffers using | |
2090 | * drm_atomic_helper_cleanup_planes(). | |
2091 | * | |
2092 | * At the very end, before cleaning up @state drivers must call | |
2093 | * drm_atomic_helper_commit_cleanup_done(). | |
2094 | * | |
2095 | * This is all implemented by in drm_atomic_helper_commit(), giving drivers a | |
9ac07815 | 2096 | * complete and easy-to-use default implementation of the atomic_commit() hook. |
a095caa7 DV |
2097 | * |
2098 | * The tracking of asynchronously executed and still pending commits is done | |
2099 | * using the core structure &drm_crtc_commit. | |
2100 | * | |
2101 | * By default there's no need to clean up resources allocated by this function | |
2102 | * explicitly: drm_atomic_state_default_clear() will take care of that | |
2103 | * automatically. | |
2104 | * | |
2105 | * Returns: | |
2106 | * | |
2107 | * 0 on success. -EBUSY when userspace schedules nonblocking commits too fast, | |
2108 | * -ENOMEM on allocation failures and -EINTR when a signal is pending. | |
2109 | */ | |
2110 | int drm_atomic_helper_setup_commit(struct drm_atomic_state *state, | |
2111 | bool nonblock) | |
2112 | { | |
2113 | struct drm_crtc *crtc; | |
415c3ac3 | 2114 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
21a01abb ML |
2115 | struct drm_connector *conn; |
2116 | struct drm_connector_state *old_conn_state, *new_conn_state; | |
2117 | struct drm_plane *plane; | |
2118 | struct drm_plane_state *old_plane_state, *new_plane_state; | |
a095caa7 | 2119 | struct drm_crtc_commit *commit; |
ddadd408 | 2120 | const struct drm_mode_config_helper_funcs *funcs; |
a095caa7 DV |
2121 | int i, ret; |
2122 | ||
ddadd408 MR |
2123 | funcs = state->dev->mode_config.helper_private; |
2124 | ||
415c3ac3 | 2125 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
a095caa7 DV |
2126 | commit = kzalloc(sizeof(*commit), GFP_KERNEL); |
2127 | if (!commit) | |
2128 | return -ENOMEM; | |
2129 | ||
21a01abb | 2130 | init_commit(commit, crtc); |
a095caa7 | 2131 | |
163bcc2c | 2132 | new_crtc_state->commit = commit; |
a095caa7 DV |
2133 | |
2134 | ret = stall_checks(crtc, nonblock); | |
2135 | if (ret) | |
2136 | return ret; | |
2137 | ||
1758f403 FDF |
2138 | /* |
2139 | * Drivers only send out events when at least either current or | |
a095caa7 | 2140 | * new CRTC state is active. Complete right away if everything |
1758f403 FDF |
2141 | * stays off. |
2142 | */ | |
415c3ac3 | 2143 | if (!old_crtc_state->active && !new_crtc_state->active) { |
a095caa7 DV |
2144 | complete_all(&commit->flip_done); |
2145 | continue; | |
2146 | } | |
2147 | ||
2148 | /* Legacy cursor updates are fully unsynced. */ | |
2149 | if (state->legacy_cursor_update) { | |
2150 | complete_all(&commit->flip_done); | |
2151 | continue; | |
2152 | } | |
2153 | ||
415c3ac3 | 2154 | if (!new_crtc_state->event) { |
a095caa7 DV |
2155 | commit->event = kzalloc(sizeof(*commit->event), |
2156 | GFP_KERNEL); | |
2157 | if (!commit->event) | |
2158 | return -ENOMEM; | |
2159 | ||
415c3ac3 | 2160 | new_crtc_state->event = commit->event; |
a095caa7 DV |
2161 | } |
2162 | ||
415c3ac3 ML |
2163 | new_crtc_state->event->base.completion = &commit->flip_done; |
2164 | new_crtc_state->event->base.completion_release = release_crtc_commit; | |
24835e44 | 2165 | drm_crtc_commit_get(commit); |
1c6ceeee LSL |
2166 | |
2167 | commit->abort_completion = true; | |
4364bcb2 LL |
2168 | |
2169 | state->crtcs[i].commit = commit; | |
2170 | drm_crtc_commit_get(commit); | |
a095caa7 DV |
2171 | } |
2172 | ||
21a01abb | 2173 | for_each_oldnew_connector_in_state(state, conn, old_conn_state, new_conn_state, i) { |
1758f403 FDF |
2174 | /* |
2175 | * Userspace is not allowed to get ahead of the previous | |
2176 | * commit with nonblocking ones. | |
2177 | */ | |
21a01abb | 2178 | if (nonblock && old_conn_state->commit && |
9073d4ed | 2179 | !try_wait_for_completion(&old_conn_state->commit->flip_done)) { |
6e22dc35 CS |
2180 | drm_dbg_atomic(conn->dev, |
2181 | "[CONNECTOR:%d:%s] busy with a previous commit\n", | |
2182 | conn->base.id, conn->name); | |
9073d4ed | 2183 | |
21a01abb | 2184 | return -EBUSY; |
9073d4ed | 2185 | } |
a095caa7 | 2186 | |
1f2d9bdc DV |
2187 | /* Always track connectors explicitly for e.g. link retraining. */ |
2188 | commit = crtc_or_fake_commit(state, new_conn_state->crtc ?: old_conn_state->crtc); | |
21a01abb ML |
2189 | if (!commit) |
2190 | return -ENOMEM; | |
a095caa7 | 2191 | |
21a01abb ML |
2192 | new_conn_state->commit = drm_crtc_commit_get(commit); |
2193 | } | |
2194 | ||
2195 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { | |
1758f403 FDF |
2196 | /* |
2197 | * Userspace is not allowed to get ahead of the previous | |
2198 | * commit with nonblocking ones. | |
2199 | */ | |
21a01abb | 2200 | if (nonblock && old_plane_state->commit && |
9073d4ed | 2201 | !try_wait_for_completion(&old_plane_state->commit->flip_done)) { |
6e22dc35 CS |
2202 | drm_dbg_atomic(plane->dev, |
2203 | "[PLANE:%d:%s] busy with a previous commit\n", | |
2204 | plane->base.id, plane->name); | |
9073d4ed | 2205 | |
21a01abb | 2206 | return -EBUSY; |
9073d4ed | 2207 | } |
21a01abb | 2208 | |
1f2d9bdc | 2209 | /* Always track planes explicitly for async pageflip support. */ |
4edd6084 | 2210 | commit = crtc_or_fake_commit(state, new_plane_state->crtc ?: old_plane_state->crtc); |
21a01abb ML |
2211 | if (!commit) |
2212 | return -ENOMEM; | |
2213 | ||
2214 | new_plane_state->commit = drm_crtc_commit_get(commit); | |
a095caa7 DV |
2215 | } |
2216 | ||
ddadd408 MR |
2217 | if (funcs && funcs->atomic_commit_setup) |
2218 | return funcs->atomic_commit_setup(state); | |
2219 | ||
a095caa7 | 2220 | return 0; |
a095caa7 | 2221 | } |
a095caa7 | 2222 | EXPORT_SYMBOL(drm_atomic_helper_setup_commit); |
a095caa7 DV |
2223 | |
2224 | /** | |
2225 | * drm_atomic_helper_wait_for_dependencies - wait for required preceeding commits | |
1ea0c02e | 2226 | * @old_state: atomic state object with old state structures |
a095caa7 DV |
2227 | * |
2228 | * This function waits for all preceeding commits that touch the same CRTC as | |
1ea0c02e | 2229 | * @old_state to both be committed to the hardware (as signalled by |
0380c684 | 2230 | * drm_atomic_helper_commit_hw_done()) and executed by the hardware (as signalled |
277b09cf | 2231 | * by calling drm_crtc_send_vblank_event() on the &drm_crtc_state.event). |
a095caa7 DV |
2232 | * |
2233 | * This is part of the atomic helper support for nonblocking commits, see | |
2234 | * drm_atomic_helper_setup_commit() for an overview. | |
2235 | */ | |
1ea0c02e | 2236 | void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *old_state) |
a095caa7 DV |
2237 | { |
2238 | struct drm_crtc *crtc; | |
163bcc2c | 2239 | struct drm_crtc_state *old_crtc_state; |
21a01abb ML |
2240 | struct drm_plane *plane; |
2241 | struct drm_plane_state *old_plane_state; | |
2242 | struct drm_connector *conn; | |
2243 | struct drm_connector_state *old_conn_state; | |
a095caa7 DV |
2244 | int i; |
2245 | long ret; | |
2246 | ||
163bcc2c | 2247 | for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
b99c2c95 MR |
2248 | ret = drm_crtc_commit_wait(old_crtc_state->commit); |
2249 | if (ret) | |
6e22dc35 CS |
2250 | drm_err(crtc->dev, |
2251 | "[CRTC:%d:%s] commit wait timed out\n", | |
2252 | crtc->base.id, crtc->name); | |
a095caa7 | 2253 | } |
21a01abb ML |
2254 | |
2255 | for_each_old_connector_in_state(old_state, conn, old_conn_state, i) { | |
b99c2c95 MR |
2256 | ret = drm_crtc_commit_wait(old_conn_state->commit); |
2257 | if (ret) | |
6e22dc35 CS |
2258 | drm_err(conn->dev, |
2259 | "[CONNECTOR:%d:%s] commit wait timed out\n", | |
2260 | conn->base.id, conn->name); | |
21a01abb ML |
2261 | } |
2262 | ||
2263 | for_each_old_plane_in_state(old_state, plane, old_plane_state, i) { | |
b99c2c95 MR |
2264 | ret = drm_crtc_commit_wait(old_plane_state->commit); |
2265 | if (ret) | |
6e22dc35 CS |
2266 | drm_err(plane->dev, |
2267 | "[PLANE:%d:%s] commit wait timed out\n", | |
2268 | plane->base.id, plane->name); | |
a095caa7 DV |
2269 | } |
2270 | } | |
2271 | EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies); | |
2272 | ||
b25c60af BB |
2273 | /** |
2274 | * drm_atomic_helper_fake_vblank - fake VBLANK events if needed | |
2275 | * @old_state: atomic state object with old state structures | |
2276 | * | |
dbe2d2bf | 2277 | * This function walks all CRTCs and fakes VBLANK events on those with |
b25c60af BB |
2278 | * &drm_crtc_state.no_vblank set to true and &drm_crtc_state.event != NULL. |
2279 | * The primary use of this function is writeback connectors working in oneshot | |
2280 | * mode and faking VBLANK events. In this case they only fake the VBLANK event | |
2281 | * when a job is queued, and any change to the pipeline that does not touch the | |
2282 | * connector is leading to timeouts when calling | |
2283 | * drm_atomic_helper_wait_for_vblanks() or | |
7beb691f TZ |
2284 | * drm_atomic_helper_wait_for_flip_done(). In addition to writeback |
2285 | * connectors, this function can also fake VBLANK events for CRTCs without | |
2286 | * VBLANK interrupt. | |
b25c60af BB |
2287 | * |
2288 | * This is part of the atomic helper support for nonblocking commits, see | |
2289 | * drm_atomic_helper_setup_commit() for an overview. | |
2290 | */ | |
2291 | void drm_atomic_helper_fake_vblank(struct drm_atomic_state *old_state) | |
2292 | { | |
2293 | struct drm_crtc_state *new_crtc_state; | |
2294 | struct drm_crtc *crtc; | |
2295 | int i; | |
2296 | ||
2297 | for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) { | |
2298 | unsigned long flags; | |
2299 | ||
2300 | if (!new_crtc_state->no_vblank) | |
2301 | continue; | |
2302 | ||
2303 | spin_lock_irqsave(&old_state->dev->event_lock, flags); | |
2304 | if (new_crtc_state->event) { | |
2305 | drm_crtc_send_vblank_event(crtc, | |
2306 | new_crtc_state->event); | |
2307 | new_crtc_state->event = NULL; | |
2308 | } | |
2309 | spin_unlock_irqrestore(&old_state->dev->event_lock, flags); | |
2310 | } | |
2311 | } | |
2312 | EXPORT_SYMBOL(drm_atomic_helper_fake_vblank); | |
2313 | ||
a095caa7 DV |
2314 | /** |
2315 | * drm_atomic_helper_commit_hw_done - setup possible nonblocking commit | |
1ea0c02e | 2316 | * @old_state: atomic state object with old state structures |
a095caa7 DV |
2317 | * |
2318 | * This function is used to signal completion of the hardware commit step. After | |
2319 | * this step the driver is not allowed to read or change any permanent software | |
2320 | * or hardware modeset state. The only exception is state protected by other | |
2321 | * means than &drm_modeset_lock locks. | |
2322 | * | |
2323 | * Drivers should try to postpone any expensive or delayed cleanup work after | |
2324 | * this function is called. | |
2325 | * | |
2326 | * This is part of the atomic helper support for nonblocking commits, see | |
2327 | * drm_atomic_helper_setup_commit() for an overview. | |
2328 | */ | |
1ea0c02e | 2329 | void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *old_state) |
a095caa7 DV |
2330 | { |
2331 | struct drm_crtc *crtc; | |
163bcc2c | 2332 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
a095caa7 DV |
2333 | struct drm_crtc_commit *commit; |
2334 | int i; | |
2335 | ||
163bcc2c ML |
2336 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
2337 | commit = new_crtc_state->commit; | |
a095caa7 DV |
2338 | if (!commit) |
2339 | continue; | |
2340 | ||
163bcc2c ML |
2341 | /* |
2342 | * copy new_crtc_state->commit to old_crtc_state->commit, | |
2343 | * it's unsafe to touch new_crtc_state after hw_done, | |
2344 | * but we still need to do so in cleanup_done(). | |
2345 | */ | |
2346 | if (old_crtc_state->commit) | |
2347 | drm_crtc_commit_put(old_crtc_state->commit); | |
2348 | ||
2349 | old_crtc_state->commit = drm_crtc_commit_get(commit); | |
2350 | ||
a095caa7 | 2351 | /* backend must have consumed any event by now */ |
415c3ac3 | 2352 | WARN_ON(new_crtc_state->event); |
a095caa7 | 2353 | complete_all(&commit->hw_done); |
a095caa7 | 2354 | } |
21a01abb ML |
2355 | |
2356 | if (old_state->fake_commit) { | |
2357 | complete_all(&old_state->fake_commit->hw_done); | |
2358 | complete_all(&old_state->fake_commit->flip_done); | |
2359 | } | |
a095caa7 DV |
2360 | } |
2361 | EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done); | |
2362 | ||
2363 | /** | |
2364 | * drm_atomic_helper_commit_cleanup_done - signal completion of commit | |
1ea0c02e | 2365 | * @old_state: atomic state object with old state structures |
a095caa7 | 2366 | * |
1ea0c02e DV |
2367 | * This signals completion of the atomic update @old_state, including any |
2368 | * cleanup work. If used, it must be called right before calling | |
0853695c | 2369 | * drm_atomic_state_put(). |
a095caa7 DV |
2370 | * |
2371 | * This is part of the atomic helper support for nonblocking commits, see | |
2372 | * drm_atomic_helper_setup_commit() for an overview. | |
2373 | */ | |
1ea0c02e | 2374 | void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *old_state) |
a095caa7 DV |
2375 | { |
2376 | struct drm_crtc *crtc; | |
163bcc2c | 2377 | struct drm_crtc_state *old_crtc_state; |
a095caa7 DV |
2378 | struct drm_crtc_commit *commit; |
2379 | int i; | |
a095caa7 | 2380 | |
163bcc2c ML |
2381 | for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) { |
2382 | commit = old_crtc_state->commit; | |
a095caa7 DV |
2383 | if (WARN_ON(!commit)) |
2384 | continue; | |
2385 | ||
a095caa7 DV |
2386 | complete_all(&commit->cleanup_done); |
2387 | WARN_ON(!try_wait_for_completion(&commit->hw_done)); | |
2388 | ||
7141fd3e | 2389 | spin_lock(&crtc->commit_lock); |
a095caa7 DV |
2390 | list_del(&commit->commit_entry); |
2391 | spin_unlock(&crtc->commit_lock); | |
2392 | } | |
21a01abb | 2393 | |
10a599fa | 2394 | if (old_state->fake_commit) { |
21a01abb | 2395 | complete_all(&old_state->fake_commit->cleanup_done); |
10a599fa VS |
2396 | WARN_ON(!try_wait_for_completion(&old_state->fake_commit->hw_done)); |
2397 | } | |
a095caa7 DV |
2398 | } |
2399 | EXPORT_SYMBOL(drm_atomic_helper_commit_cleanup_done); | |
2400 | ||
c2fcd274 | 2401 | /** |
2e3afd47 | 2402 | * drm_atomic_helper_prepare_planes - prepare plane resources before commit |
c2fcd274 | 2403 | * @dev: DRM device |
2e3afd47 | 2404 | * @state: atomic state object with new state structures |
c2fcd274 DV |
2405 | * |
2406 | * This function prepares plane state, specifically framebuffers, for the new | |
6806cdf9 DV |
2407 | * configuration, by calling &drm_plane_helper_funcs.prepare_fb. If any failure |
2408 | * is encountered this function will call &drm_plane_helper_funcs.cleanup_fb on | |
2409 | * any already successfully prepared framebuffer. | |
c2fcd274 DV |
2410 | * |
2411 | * Returns: | |
2412 | * 0 on success, negative error code on failure. | |
2413 | */ | |
2414 | int drm_atomic_helper_prepare_planes(struct drm_device *dev, | |
2415 | struct drm_atomic_state *state) | |
2416 | { | |
9d2230dc LP |
2417 | struct drm_connector *connector; |
2418 | struct drm_connector_state *new_conn_state; | |
be9174a4 | 2419 | struct drm_plane *plane; |
415c3ac3 | 2420 | struct drm_plane_state *new_plane_state; |
be9174a4 | 2421 | int ret, i, j; |
c2fcd274 | 2422 | |
9d2230dc LP |
2423 | for_each_new_connector_in_state(state, connector, new_conn_state, i) { |
2424 | if (!new_conn_state->writeback_job) | |
2425 | continue; | |
2426 | ||
2427 | ret = drm_writeback_prepare_job(new_conn_state->writeback_job); | |
2428 | if (ret < 0) | |
2429 | return ret; | |
2430 | } | |
2431 | ||
415c3ac3 | 2432 | for_each_new_plane_in_state(state, plane, new_plane_state, i) { |
b5ceff20 | 2433 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 DV |
2434 | |
2435 | funcs = plane->helper_private; | |
2436 | ||
844f9111 | 2437 | if (funcs->prepare_fb) { |
415c3ac3 | 2438 | ret = funcs->prepare_fb(plane, new_plane_state); |
c2fcd274 DV |
2439 | if (ret) |
2440 | goto fail; | |
7d30963f DV |
2441 | } else { |
2442 | WARN_ON_ONCE(funcs->cleanup_fb); | |
2443 | ||
2444 | if (!drm_core_check_feature(dev, DRIVER_GEM)) | |
2445 | continue; | |
2446 | ||
2447 | ret = drm_gem_plane_helper_prepare_fb(plane, new_plane_state); | |
2448 | if (ret) | |
2449 | goto fail; | |
c2fcd274 DV |
2450 | } |
2451 | } | |
2452 | ||
2453 | return 0; | |
2454 | ||
2455 | fail: | |
415c3ac3 | 2456 | for_each_new_plane_in_state(state, plane, new_plane_state, j) { |
b5ceff20 | 2457 | const struct drm_plane_helper_funcs *funcs; |
c2fcd274 | 2458 | |
be9174a4 | 2459 | if (j >= i) |
c2fcd274 DV |
2460 | continue; |
2461 | ||
2462 | funcs = plane->helper_private; | |
2463 | ||
844f9111 | 2464 | if (funcs->cleanup_fb) |
415c3ac3 | 2465 | funcs->cleanup_fb(plane, new_plane_state); |
c2fcd274 DV |
2466 | } |
2467 | ||
2468 | return ret; | |
2469 | } | |
2470 | EXPORT_SYMBOL(drm_atomic_helper_prepare_planes); | |
2471 | ||
7135ac54 | 2472 | static bool plane_crtc_active(const struct drm_plane_state *state) |
aef9dbb8 DV |
2473 | { |
2474 | return state->crtc && state->crtc->state->active; | |
2475 | } | |
2476 | ||
c2fcd274 DV |
2477 | /** |
2478 | * drm_atomic_helper_commit_planes - commit plane state | |
2479 | * @dev: DRM device | |
b0fcfc89 | 2480 | * @old_state: atomic state object with old state structures |
2b58e98d | 2481 | * @flags: flags for committing plane state |
c2fcd274 DV |
2482 | * |
2483 | * This function commits the new plane state using the plane and atomic helper | |
42240c90 | 2484 | * functions for planes and CRTCs. It assumes that the atomic state has already |
c2fcd274 DV |
2485 | * been pushed into the relevant object state pointers, since this step can no |
2486 | * longer fail. | |
2487 | * | |
b0fcfc89 | 2488 | * It still requires the global state object @old_state to know which planes and |
c2fcd274 | 2489 | * crtcs need to be updated though. |
de28d021 ML |
2490 | * |
2491 | * Note that this function does all plane updates across all CRTCs in one step. | |
2492 | * If the hardware can't support this approach look at | |
2493 | * drm_atomic_helper_commit_planes_on_crtc() instead. | |
6e48ae32 DV |
2494 | * |
2495 | * Plane parameters can be updated by applications while the associated CRTC is | |
2496 | * disabled. The DRM/KMS core will store the parameters in the plane state, | |
2497 | * which will be available to the driver when the CRTC is turned on. As a result | |
2498 | * most drivers don't need to be immediately notified of plane updates for a | |
2499 | * disabled CRTC. | |
2500 | * | |
2b58e98d LY |
2501 | * Unless otherwise needed, drivers are advised to set the ACTIVE_ONLY flag in |
2502 | * @flags in order not to receive plane update notifications related to a | |
2503 | * disabled CRTC. This avoids the need to manually ignore plane updates in | |
6e48ae32 DV |
2504 | * driver code when the driver and/or hardware can't or just don't need to deal |
2505 | * with updates on disabled CRTCs, for example when supporting runtime PM. | |
2506 | * | |
2b58e98d LY |
2507 | * Drivers may set the NO_DISABLE_AFTER_MODESET flag in @flags if the relevant |
2508 | * display controllers require to disable a CRTC's planes when the CRTC is | |
6806cdf9 DV |
2509 | * disabled. This function would skip the &drm_plane_helper_funcs.atomic_disable |
2510 | * call for a plane if the CRTC of the old plane state needs a modesetting | |
2511 | * operation. Of course, the drivers need to disable the planes in their CRTC | |
2512 | * disable callbacks since no one else would do that. | |
2b58e98d LY |
2513 | * |
2514 | * The drm_atomic_helper_commit() default implementation doesn't set the | |
2515 | * ACTIVE_ONLY flag to most closely match the behaviour of the legacy helpers. | |
2516 | * This should not be copied blindly by drivers. | |
c2fcd274 DV |
2517 | */ |
2518 | void drm_atomic_helper_commit_planes(struct drm_device *dev, | |
aef9dbb8 | 2519 | struct drm_atomic_state *old_state, |
2b58e98d | 2520 | uint32_t flags) |
c2fcd274 | 2521 | { |
df63b999 | 2522 | struct drm_crtc *crtc; |
415c3ac3 | 2523 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
df63b999 | 2524 | struct drm_plane *plane; |
415c3ac3 | 2525 | struct drm_plane_state *old_plane_state, *new_plane_state; |
c2fcd274 | 2526 | int i; |
2b58e98d LY |
2527 | bool active_only = flags & DRM_PLANE_COMMIT_ACTIVE_ONLY; |
2528 | bool no_disable = flags & DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET; | |
c2fcd274 | 2529 | |
415c3ac3 | 2530 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
b5ceff20 | 2531 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
2532 | |
2533 | funcs = crtc->helper_private; | |
2534 | ||
2535 | if (!funcs || !funcs->atomic_begin) | |
2536 | continue; | |
2537 | ||
415c3ac3 | 2538 | if (active_only && !new_crtc_state->active) |
aef9dbb8 DV |
2539 | continue; |
2540 | ||
f6ebe9f9 | 2541 | funcs->atomic_begin(crtc, old_state); |
c2fcd274 DV |
2542 | } |
2543 | ||
415c3ac3 | 2544 | for_each_oldnew_plane_in_state(old_state, plane, old_plane_state, new_plane_state, i) { |
b5ceff20 | 2545 | const struct drm_plane_helper_funcs *funcs; |
216c59d6 | 2546 | bool disabling; |
c2fcd274 DV |
2547 | |
2548 | funcs = plane->helper_private; | |
2549 | ||
3cad4b68 | 2550 | if (!funcs) |
c2fcd274 DV |
2551 | continue; |
2552 | ||
51ffa12d ML |
2553 | disabling = drm_atomic_plane_disabling(old_plane_state, |
2554 | new_plane_state); | |
216c59d6 LP |
2555 | |
2556 | if (active_only) { | |
2557 | /* | |
2558 | * Skip planes related to inactive CRTCs. If the plane | |
2559 | * is enabled use the state of the current CRTC. If the | |
2560 | * plane is being disabled use the state of the old | |
2561 | * CRTC to avoid skipping planes being disabled on an | |
2562 | * active CRTC. | |
2563 | */ | |
415c3ac3 | 2564 | if (!disabling && !plane_crtc_active(new_plane_state)) |
216c59d6 LP |
2565 | continue; |
2566 | if (disabling && !plane_crtc_active(old_plane_state)) | |
2567 | continue; | |
2568 | } | |
aef9dbb8 | 2569 | |
407b8bd9 TR |
2570 | /* |
2571 | * Special-case disabling the plane if drivers support it. | |
2572 | */ | |
2b58e98d LY |
2573 | if (disabling && funcs->atomic_disable) { |
2574 | struct drm_crtc_state *crtc_state; | |
2575 | ||
2576 | crtc_state = old_plane_state->crtc->state; | |
2577 | ||
2578 | if (drm_atomic_crtc_needs_modeset(crtc_state) && | |
2579 | no_disable) | |
2580 | continue; | |
2581 | ||
977697e2 | 2582 | funcs->atomic_disable(plane, old_state); |
415c3ac3 | 2583 | } else if (new_plane_state->crtc || disabling) { |
977697e2 | 2584 | funcs->atomic_update(plane, old_state); |
2b58e98d | 2585 | } |
c2fcd274 DV |
2586 | } |
2587 | ||
415c3ac3 | 2588 | for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) { |
b5ceff20 | 2589 | const struct drm_crtc_helper_funcs *funcs; |
c2fcd274 DV |
2590 | |
2591 | funcs = crtc->helper_private; | |
2592 | ||
2593 | if (!funcs || !funcs->atomic_flush) | |
2594 | continue; | |
2595 | ||
415c3ac3 | 2596 | if (active_only && !new_crtc_state->active) |
aef9dbb8 DV |
2597 | continue; |
2598 | ||
f6ebe9f9 | 2599 | funcs->atomic_flush(crtc, old_state); |
c2fcd274 DV |
2600 | } |
2601 | } | |
2602 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes); | |
2603 | ||
de28d021 | 2604 | /** |
42240c90 TR |
2605 | * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a CRTC |
2606 | * @old_crtc_state: atomic state object with the old CRTC state | |
de28d021 ML |
2607 | * |
2608 | * This function commits the new plane state using the plane and atomic helper | |
42240c90 | 2609 | * functions for planes on the specific CRTC. It assumes that the atomic state |
de28d021 ML |
2610 | * has already been pushed into the relevant object state pointers, since this |
2611 | * step can no longer fail. | |
2612 | * | |
42240c90 | 2613 | * This function is useful when plane updates should be done CRTC-by-CRTC |
de28d021 ML |
2614 | * instead of one global step like drm_atomic_helper_commit_planes() does. |
2615 | * | |
2616 | * This function can only be savely used when planes are not allowed to move | |
2617 | * between different CRTCs because this function doesn't handle inter-CRTC | |
0ae865ef | 2618 | * dependencies. Callers need to ensure that either no such dependencies exist, |
de28d021 ML |
2619 | * resolve them through ordering of commit calls or through some other means. |
2620 | */ | |
2621 | void | |
2622 | drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state) | |
2623 | { | |
2624 | const struct drm_crtc_helper_funcs *crtc_funcs; | |
2625 | struct drm_crtc *crtc = old_crtc_state->crtc; | |
2626 | struct drm_atomic_state *old_state = old_crtc_state->state; | |
e35a2f9a VS |
2627 | struct drm_crtc_state *new_crtc_state = |
2628 | drm_atomic_get_new_crtc_state(old_state, crtc); | |
de28d021 | 2629 | struct drm_plane *plane; |
9237ec1f | 2630 | unsigned int plane_mask; |
de28d021 ML |
2631 | |
2632 | plane_mask = old_crtc_state->plane_mask; | |
e35a2f9a | 2633 | plane_mask |= new_crtc_state->plane_mask; |
de28d021 ML |
2634 | |
2635 | crtc_funcs = crtc->helper_private; | |
2636 | if (crtc_funcs && crtc_funcs->atomic_begin) | |
f6ebe9f9 | 2637 | crtc_funcs->atomic_begin(crtc, old_state); |
de28d021 ML |
2638 | |
2639 | drm_for_each_plane_mask(plane, crtc->dev, plane_mask) { | |
2640 | struct drm_plane_state *old_plane_state = | |
b4d93679 | 2641 | drm_atomic_get_old_plane_state(old_state, plane); |
e35a2f9a VS |
2642 | struct drm_plane_state *new_plane_state = |
2643 | drm_atomic_get_new_plane_state(old_state, plane); | |
de28d021 ML |
2644 | const struct drm_plane_helper_funcs *plane_funcs; |
2645 | ||
2646 | plane_funcs = plane->helper_private; | |
2647 | ||
2648 | if (!old_plane_state || !plane_funcs) | |
2649 | continue; | |
2650 | ||
e35a2f9a VS |
2651 | WARN_ON(new_plane_state->crtc && |
2652 | new_plane_state->crtc != crtc); | |
de28d021 | 2653 | |
e35a2f9a | 2654 | if (drm_atomic_plane_disabling(old_plane_state, new_plane_state) && |
de28d021 | 2655 | plane_funcs->atomic_disable) |
977697e2 | 2656 | plane_funcs->atomic_disable(plane, old_state); |
e35a2f9a VS |
2657 | else if (new_plane_state->crtc || |
2658 | drm_atomic_plane_disabling(old_plane_state, new_plane_state)) | |
977697e2 | 2659 | plane_funcs->atomic_update(plane, old_state); |
de28d021 ML |
2660 | } |
2661 | ||
2662 | if (crtc_funcs && crtc_funcs->atomic_flush) | |
f6ebe9f9 | 2663 | crtc_funcs->atomic_flush(crtc, old_state); |
de28d021 ML |
2664 | } |
2665 | EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc); | |
2666 | ||
6753ba97 JS |
2667 | /** |
2668 | * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes | |
28500291 | 2669 | * @old_crtc_state: atomic state object with the old CRTC state |
6753ba97 JS |
2670 | * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks |
2671 | * | |
2672 | * Disables all planes associated with the given CRTC. This can be | |
28500291 LY |
2673 | * used for instance in the CRTC helper atomic_disable callback to disable |
2674 | * all planes. | |
6753ba97 JS |
2675 | * |
2676 | * If the atomic-parameter is set the function calls the CRTC's | |
2677 | * atomic_begin hook before and atomic_flush hook after disabling the | |
2678 | * planes. | |
2679 | * | |
2680 | * It is a bug to call this function without having implemented the | |
6806cdf9 | 2681 | * &drm_plane_helper_funcs.atomic_disable plane hook. |
6753ba97 | 2682 | */ |
28500291 LY |
2683 | void |
2684 | drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state, | |
2685 | bool atomic) | |
6753ba97 | 2686 | { |
28500291 | 2687 | struct drm_crtc *crtc = old_crtc_state->crtc; |
6753ba97 JS |
2688 | const struct drm_crtc_helper_funcs *crtc_funcs = |
2689 | crtc->helper_private; | |
2690 | struct drm_plane *plane; | |
2691 | ||
2692 | if (atomic && crtc_funcs && crtc_funcs->atomic_begin) | |
2693 | crtc_funcs->atomic_begin(crtc, NULL); | |
2694 | ||
28500291 | 2695 | drm_atomic_crtc_state_for_each_plane(plane, old_crtc_state) { |
6753ba97 JS |
2696 | const struct drm_plane_helper_funcs *plane_funcs = |
2697 | plane->helper_private; | |
2698 | ||
28500291 | 2699 | if (!plane_funcs) |
6753ba97 JS |
2700 | continue; |
2701 | ||
2702 | WARN_ON(!plane_funcs->atomic_disable); | |
2703 | if (plane_funcs->atomic_disable) | |
2704 | plane_funcs->atomic_disable(plane, NULL); | |
2705 | } | |
2706 | ||
2707 | if (atomic && crtc_funcs && crtc_funcs->atomic_flush) | |
2708 | crtc_funcs->atomic_flush(crtc, NULL); | |
2709 | } | |
2710 | EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc); | |
2711 | ||
c2fcd274 DV |
2712 | /** |
2713 | * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit | |
2714 | * @dev: DRM device | |
2715 | * @old_state: atomic state object with old state structures | |
2716 | * | |
2717 | * This function cleans up plane state, specifically framebuffers, from the old | |
2718 | * configuration. Hence the old configuration must be perserved in @old_state to | |
2719 | * be able to call this function. | |
2720 | * | |
2721 | * This function must also be called on the new state when the atomic update | |
2722 | * fails at any point after calling drm_atomic_helper_prepare_planes(). | |
2723 | */ | |
2724 | void drm_atomic_helper_cleanup_planes(struct drm_device *dev, | |
2725 | struct drm_atomic_state *old_state) | |
2726 | { | |
df63b999 | 2727 | struct drm_plane *plane; |
415c3ac3 | 2728 | struct drm_plane_state *old_plane_state, *new_plane_state; |
c2fcd274 DV |
2729 | int i; |
2730 | ||
415c3ac3 | 2731 | for_each_oldnew_plane_in_state(old_state, plane, old_plane_state, new_plane_state, i) { |
b5ceff20 | 2732 | const struct drm_plane_helper_funcs *funcs; |
415c3ac3 ML |
2733 | struct drm_plane_state *plane_state; |
2734 | ||
2735 | /* | |
2736 | * This might be called before swapping when commit is aborted, | |
2737 | * in which case we have to cleanup the new state. | |
2738 | */ | |
2739 | if (old_plane_state == plane->state) | |
2740 | plane_state = new_plane_state; | |
2741 | else | |
2742 | plane_state = old_plane_state; | |
c2fcd274 | 2743 | |
c2fcd274 DV |
2744 | funcs = plane->helper_private; |
2745 | ||
844f9111 ML |
2746 | if (funcs->cleanup_fb) |
2747 | funcs->cleanup_fb(plane, plane_state); | |
c2fcd274 DV |
2748 | } |
2749 | } | |
2750 | EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes); | |
2751 | ||
2752 | /** | |
2753 | * drm_atomic_helper_swap_state - store atomic state into current sw state | |
c2fcd274 | 2754 | * @state: atomic state |
0ae865ef | 2755 | * @stall: stall for preceding commits |
c2fcd274 DV |
2756 | * |
2757 | * This function stores the atomic state into the current state pointers in all | |
2758 | * driver objects. It should be called after all failing steps have been done | |
2759 | * and succeeded, but before the actual hardware state is committed. | |
2760 | * | |
2761 | * For cleanup and error recovery the current state for all changed objects will | |
c066d231 | 2762 | * be swapped into @state. |
c2fcd274 DV |
2763 | * |
2764 | * With that sequence it fits perfectly into the plane prepare/cleanup sequence: | |
2765 | * | |
2766 | * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state. | |
2767 | * | |
2768 | * 2. Do any other steps that might fail. | |
2769 | * | |
2770 | * 3. Put the staged state into the current state pointers with this function. | |
2771 | * | |
2772 | * 4. Actually commit the hardware state. | |
2773 | * | |
26196f7e | 2774 | * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3 |
c2fcd274 | 2775 | * contains the old state. Also do any other cleanup required with that state. |
a095caa7 DV |
2776 | * |
2777 | * @stall must be set when nonblocking commits for this driver directly access | |
6806cdf9 DV |
2778 | * the &drm_plane.state, &drm_crtc.state or &drm_connector.state pointer. With |
2779 | * the current atomic helpers this is almost always the case, since the helpers | |
a095caa7 | 2780 | * don't pass the right state structures to the callbacks. |
c066d231 ML |
2781 | * |
2782 | * Returns: | |
2783 | * | |
c4bbb735 ML |
2784 | * Returns 0 on success. Can return -ERESTARTSYS when @stall is true and the |
2785 | * waiting for the previous commits has been interrupted. | |
c2fcd274 | 2786 | */ |
c066d231 | 2787 | int drm_atomic_helper_swap_state(struct drm_atomic_state *state, |
5e84c269 | 2788 | bool stall) |
c2fcd274 | 2789 | { |
c4bbb735 | 2790 | int i, ret; |
be9174a4 | 2791 | struct drm_connector *connector; |
415c3ac3 | 2792 | struct drm_connector_state *old_conn_state, *new_conn_state; |
be9174a4 | 2793 | struct drm_crtc *crtc; |
415c3ac3 | 2794 | struct drm_crtc_state *old_crtc_state, *new_crtc_state; |
be9174a4 | 2795 | struct drm_plane *plane; |
415c3ac3 | 2796 | struct drm_plane_state *old_plane_state, *new_plane_state; |
a095caa7 | 2797 | struct drm_crtc_commit *commit; |
a4370c77 VS |
2798 | struct drm_private_obj *obj; |
2799 | struct drm_private_state *old_obj_state, *new_obj_state; | |
a095caa7 DV |
2800 | |
2801 | if (stall) { | |
21a01abb ML |
2802 | /* |
2803 | * We have to stall for hw_done here before | |
2804 | * drm_atomic_helper_wait_for_dependencies() because flip | |
2805 | * depth > 1 is not yet supported by all drivers. As long as | |
2806 | * obj->state is directly dereferenced anywhere in the drivers | |
2807 | * atomic_commit_tail function, then it's unsafe to swap state | |
2808 | * before drm_atomic_helper_commit_hw_done() is called. | |
2809 | */ | |
2810 | ||
163bcc2c ML |
2811 | for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) { |
2812 | commit = old_crtc_state->commit; | |
a095caa7 DV |
2813 | |
2814 | if (!commit) | |
2815 | continue; | |
2816 | ||
c4bbb735 | 2817 | ret = wait_for_completion_interruptible(&commit->hw_done); |
c4bbb735 ML |
2818 | if (ret) |
2819 | return ret; | |
a095caa7 | 2820 | } |
21a01abb ML |
2821 | |
2822 | for_each_old_connector_in_state(state, connector, old_conn_state, i) { | |
2823 | commit = old_conn_state->commit; | |
a095caa7 DV |
2824 | |
2825 | if (!commit) | |
2826 | continue; | |
2827 | ||
c4bbb735 | 2828 | ret = wait_for_completion_interruptible(&commit->hw_done); |
21a01abb ML |
2829 | if (ret) |
2830 | return ret; | |
2831 | } | |
c4bbb735 | 2832 | |
21a01abb ML |
2833 | for_each_old_plane_in_state(state, plane, old_plane_state, i) { |
2834 | commit = old_plane_state->commit; | |
2835 | ||
2836 | if (!commit) | |
2837 | continue; | |
2838 | ||
2839 | ret = wait_for_completion_interruptible(&commit->hw_done); | |
c4bbb735 ML |
2840 | if (ret) |
2841 | return ret; | |
a095caa7 DV |
2842 | } |
2843 | } | |
c2fcd274 | 2844 | |
415c3ac3 | 2845 | for_each_oldnew_connector_in_state(state, connector, old_conn_state, new_conn_state, i) { |
581e49fe ML |
2846 | WARN_ON(connector->state != old_conn_state); |
2847 | ||
415c3ac3 ML |
2848 | old_conn_state->state = state; |
2849 | new_conn_state->state = NULL; | |
2850 | ||
2851 | state->connectors[i].state = old_conn_state; | |
2852 | connector->state = new_conn_state; | |
c2fcd274 DV |
2853 | } |
2854 | ||
415c3ac3 | 2855 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
581e49fe ML |
2856 | WARN_ON(crtc->state != old_crtc_state); |
2857 | ||
415c3ac3 ML |
2858 | old_crtc_state->state = state; |
2859 | new_crtc_state->state = NULL; | |
2860 | ||
2861 | state->crtcs[i].state = old_crtc_state; | |
2862 | crtc->state = new_crtc_state; | |
a095caa7 | 2863 | |
163bcc2c | 2864 | if (new_crtc_state->commit) { |
a095caa7 | 2865 | spin_lock(&crtc->commit_lock); |
163bcc2c | 2866 | list_add(&new_crtc_state->commit->commit_entry, |
a095caa7 DV |
2867 | &crtc->commit_list); |
2868 | spin_unlock(&crtc->commit_lock); | |
2869 | ||
163bcc2c | 2870 | new_crtc_state->commit->event = NULL; |
a095caa7 | 2871 | } |
c2fcd274 DV |
2872 | } |
2873 | ||
415c3ac3 | 2874 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { |
581e49fe ML |
2875 | WARN_ON(plane->state != old_plane_state); |
2876 | ||
415c3ac3 ML |
2877 | old_plane_state->state = state; |
2878 | new_plane_state->state = NULL; | |
2879 | ||
2880 | state->planes[i].state = old_plane_state; | |
2881 | plane->state = new_plane_state; | |
c2fcd274 | 2882 | } |
b430c27a | 2883 | |
a4370c77 VS |
2884 | for_each_oldnew_private_obj_in_state(state, obj, old_obj_state, new_obj_state, i) { |
2885 | WARN_ON(obj->state != old_obj_state); | |
2886 | ||
2887 | old_obj_state->state = state; | |
2888 | new_obj_state->state = NULL; | |
2889 | ||
2890 | state->private_objs[i].state = old_obj_state; | |
2891 | obj->state = new_obj_state; | |
2892 | } | |
c066d231 ML |
2893 | |
2894 | return 0; | |
c2fcd274 DV |
2895 | } |
2896 | EXPORT_SYMBOL(drm_atomic_helper_swap_state); | |
042652ed DV |
2897 | |
2898 | /** | |
2899 | * drm_atomic_helper_update_plane - Helper for primary plane update using atomic | |
2900 | * @plane: plane object to update | |
2901 | * @crtc: owning CRTC of owning plane | |
2902 | * @fb: framebuffer to flip onto plane | |
42240c90 TR |
2903 | * @crtc_x: x offset of primary plane on @crtc |
2904 | * @crtc_y: y offset of primary plane on @crtc | |
2905 | * @crtc_w: width of primary plane rectangle on @crtc | |
2906 | * @crtc_h: height of primary plane rectangle on @crtc | |
042652ed DV |
2907 | * @src_x: x offset of @fb for panning |
2908 | * @src_y: y offset of @fb for panning | |
2909 | * @src_w: width of source rectangle in @fb | |
2910 | * @src_h: height of source rectangle in @fb | |
34a2ab5e | 2911 | * @ctx: lock acquire context |
042652ed DV |
2912 | * |
2913 | * Provides a default plane update handler using the atomic driver interface. | |
2914 | * | |
2915 | * RETURNS: | |
2916 | * Zero on success, error code on failure | |
2917 | */ | |
2918 | int drm_atomic_helper_update_plane(struct drm_plane *plane, | |
2919 | struct drm_crtc *crtc, | |
2920 | struct drm_framebuffer *fb, | |
2921 | int crtc_x, int crtc_y, | |
2922 | unsigned int crtc_w, unsigned int crtc_h, | |
2923 | uint32_t src_x, uint32_t src_y, | |
34a2ab5e DV |
2924 | uint32_t src_w, uint32_t src_h, |
2925 | struct drm_modeset_acquire_ctx *ctx) | |
042652ed DV |
2926 | { |
2927 | struct drm_atomic_state *state; | |
2928 | struct drm_plane_state *plane_state; | |
2929 | int ret = 0; | |
2930 | ||
2931 | state = drm_atomic_state_alloc(plane->dev); | |
2932 | if (!state) | |
2933 | return -ENOMEM; | |
2934 | ||
d26f96c7 | 2935 | state->acquire_ctx = ctx; |
042652ed DV |
2936 | plane_state = drm_atomic_get_plane_state(state, plane); |
2937 | if (IS_ERR(plane_state)) { | |
2938 | ret = PTR_ERR(plane_state); | |
2939 | goto fail; | |
2940 | } | |
2941 | ||
07cc0ef6 | 2942 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
042652ed DV |
2943 | if (ret != 0) |
2944 | goto fail; | |
321ebf04 | 2945 | drm_atomic_set_fb_for_plane(plane_state, fb); |
042652ed DV |
2946 | plane_state->crtc_x = crtc_x; |
2947 | plane_state->crtc_y = crtc_y; | |
042652ed | 2948 | plane_state->crtc_w = crtc_w; |
02e6f379 | 2949 | plane_state->crtc_h = crtc_h; |
042652ed DV |
2950 | plane_state->src_x = src_x; |
2951 | plane_state->src_y = src_y; | |
042652ed | 2952 | plane_state->src_w = src_w; |
02e6f379 | 2953 | plane_state->src_h = src_h; |
042652ed | 2954 | |
3671c580 DV |
2955 | if (plane == crtc->cursor) |
2956 | state->legacy_cursor_update = true; | |
2957 | ||
042652ed | 2958 | ret = drm_atomic_commit(state); |
042652ed | 2959 | fail: |
0853695c | 2960 | drm_atomic_state_put(state); |
042652ed | 2961 | return ret; |
042652ed DV |
2962 | } |
2963 | EXPORT_SYMBOL(drm_atomic_helper_update_plane); | |
2964 | ||
2965 | /** | |
2966 | * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic | |
2967 | * @plane: plane to disable | |
19315294 | 2968 | * @ctx: lock acquire context |
042652ed DV |
2969 | * |
2970 | * Provides a default plane disable handler using the atomic driver interface. | |
2971 | * | |
2972 | * RETURNS: | |
2973 | * Zero on success, error code on failure | |
2974 | */ | |
19315294 DV |
2975 | int drm_atomic_helper_disable_plane(struct drm_plane *plane, |
2976 | struct drm_modeset_acquire_ctx *ctx) | |
042652ed DV |
2977 | { |
2978 | struct drm_atomic_state *state; | |
2979 | struct drm_plane_state *plane_state; | |
2980 | int ret = 0; | |
2981 | ||
2982 | state = drm_atomic_state_alloc(plane->dev); | |
2983 | if (!state) | |
2984 | return -ENOMEM; | |
2985 | ||
d26f96c7 | 2986 | state->acquire_ctx = ctx; |
042652ed DV |
2987 | plane_state = drm_atomic_get_plane_state(state, plane); |
2988 | if (IS_ERR(plane_state)) { | |
2989 | ret = PTR_ERR(plane_state); | |
2990 | goto fail; | |
2991 | } | |
2992 | ||
a36c027d | 2993 | if (plane_state->crtc && plane_state->crtc->cursor == plane) |
24e79d0d ML |
2994 | plane_state->state->legacy_cursor_update = true; |
2995 | ||
bbb1e524 | 2996 | ret = __drm_atomic_helper_disable_plane(plane, plane_state); |
042652ed DV |
2997 | if (ret != 0) |
2998 | goto fail; | |
f02ad907 | 2999 | |
042652ed | 3000 | ret = drm_atomic_commit(state); |
042652ed | 3001 | fail: |
0853695c | 3002 | drm_atomic_state_put(state); |
042652ed | 3003 | return ret; |
042652ed DV |
3004 | } |
3005 | EXPORT_SYMBOL(drm_atomic_helper_disable_plane); | |
3006 | ||
042652ed DV |
3007 | /** |
3008 | * drm_atomic_helper_set_config - set a new config from userspace | |
3009 | * @set: mode set configuration | |
a4eff9aa | 3010 | * @ctx: lock acquisition context |
042652ed | 3011 | * |
42240c90 | 3012 | * Provides a default CRTC set_config handler using the atomic driver interface. |
042652ed | 3013 | * |
40ee6fbe MN |
3014 | * NOTE: For backwards compatibility with old userspace this automatically |
3015 | * resets the "link-status" property to GOOD, to force any link | |
3016 | * re-training. The SETCRTC ioctl does not define whether an update does | |
3017 | * need a full modeset or just a plane update, hence we're allowed to do | |
97e14fbe | 3018 | * that. See also drm_connector_set_link_status_property(). |
40ee6fbe | 3019 | * |
042652ed DV |
3020 | * Returns: |
3021 | * Returns 0 on success, negative errno numbers on failure. | |
3022 | */ | |
a4eff9aa DV |
3023 | int drm_atomic_helper_set_config(struct drm_mode_set *set, |
3024 | struct drm_modeset_acquire_ctx *ctx) | |
042652ed DV |
3025 | { |
3026 | struct drm_atomic_state *state; | |
3027 | struct drm_crtc *crtc = set->crtc; | |
042652ed DV |
3028 | int ret = 0; |
3029 | ||
3030 | state = drm_atomic_state_alloc(crtc->dev); | |
3031 | if (!state) | |
3032 | return -ENOMEM; | |
3033 | ||
38b6441e | 3034 | state->acquire_ctx = ctx; |
bbb1e524 RC |
3035 | ret = __drm_atomic_helper_set_config(set, state); |
3036 | if (ret != 0) | |
1fa4da04 | 3037 | goto fail; |
042652ed | 3038 | |
44596b8c ML |
3039 | ret = handle_conflicting_encoders(state, true); |
3040 | if (ret) | |
43b67309 | 3041 | goto fail; |
44596b8c | 3042 | |
bbb1e524 | 3043 | ret = drm_atomic_commit(state); |
bbb1e524 | 3044 | |
1fa4da04 | 3045 | fail: |
0853695c | 3046 | drm_atomic_state_put(state); |
bbb1e524 | 3047 | return ret; |
bbb1e524 RC |
3048 | } |
3049 | EXPORT_SYMBOL(drm_atomic_helper_set_config); | |
3050 | ||
37406a60 SP |
3051 | /** |
3052 | * drm_atomic_helper_disable_all - disable all currently active outputs | |
3053 | * @dev: DRM device | |
3054 | * @ctx: lock acquisition context | |
3055 | * | |
3056 | * Loops through all connectors, finding those that aren't turned off and then | |
3057 | * turns them off by setting their DPMS mode to OFF and deactivating the CRTC | |
3058 | * that they are connected to. | |
3059 | * | |
3060 | * This is used for example in suspend/resume to disable all currently active | |
3061 | * functions when suspending. If you just want to shut down everything at e.g. | |
3062 | * driver unload, look at drm_atomic_helper_shutdown(). | |
3063 | * | |
3064 | * Note that if callers haven't already acquired all modeset locks this might | |
3065 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
3066 | * | |
3067 | * Returns: | |
3068 | * 0 on success or a negative error code on failure. | |
3069 | * | |
3070 | * See also: | |
3071 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() and | |
3072 | * drm_atomic_helper_shutdown(). | |
3073 | */ | |
3074 | int drm_atomic_helper_disable_all(struct drm_device *dev, | |
3075 | struct drm_modeset_acquire_ctx *ctx) | |
14942760 TR |
3076 | { |
3077 | struct drm_atomic_state *state; | |
9b2104f4 | 3078 | struct drm_connector_state *conn_state; |
14942760 | 3079 | struct drm_connector *conn; |
9b2104f4 ML |
3080 | struct drm_plane_state *plane_state; |
3081 | struct drm_plane *plane; | |
3082 | struct drm_crtc_state *crtc_state; | |
3083 | struct drm_crtc *crtc; | |
3084 | int ret, i; | |
14942760 TR |
3085 | |
3086 | state = drm_atomic_state_alloc(dev); | |
3087 | if (!state) | |
3088 | return -ENOMEM; | |
3089 | ||
3090 | state->acquire_ctx = ctx; | |
3091 | ||
9b2104f4 | 3092 | drm_for_each_crtc(crtc, dev) { |
14942760 TR |
3093 | crtc_state = drm_atomic_get_crtc_state(state, crtc); |
3094 | if (IS_ERR(crtc_state)) { | |
9b2104f4 | 3095 | ret = PTR_ERR(crtc_state); |
14942760 TR |
3096 | goto free; |
3097 | } | |
3098 | ||
3099 | crtc_state->active = false; | |
9b2104f4 ML |
3100 | |
3101 | ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, NULL); | |
3102 | if (ret < 0) | |
3103 | goto free; | |
3104 | ||
3105 | ret = drm_atomic_add_affected_planes(state, crtc); | |
3106 | if (ret < 0) | |
3107 | goto free; | |
3108 | ||
3109 | ret = drm_atomic_add_affected_connectors(state, crtc); | |
3110 | if (ret < 0) | |
3111 | goto free; | |
3112 | } | |
3113 | ||
dfb8bb3b | 3114 | for_each_new_connector_in_state(state, conn, conn_state, i) { |
9b2104f4 ML |
3115 | ret = drm_atomic_set_crtc_for_connector(conn_state, NULL); |
3116 | if (ret < 0) | |
3117 | goto free; | |
3118 | } | |
3119 | ||
dfb8bb3b | 3120 | for_each_new_plane_in_state(state, plane, plane_state, i) { |
9b2104f4 ML |
3121 | ret = drm_atomic_set_crtc_for_plane(plane_state, NULL); |
3122 | if (ret < 0) | |
3123 | goto free; | |
3124 | ||
3125 | drm_atomic_set_fb_for_plane(plane_state, NULL); | |
14942760 TR |
3126 | } |
3127 | ||
9b2104f4 | 3128 | ret = drm_atomic_commit(state); |
14942760 | 3129 | free: |
0853695c | 3130 | drm_atomic_state_put(state); |
9b2104f4 | 3131 | return ret; |
14942760 TR |
3132 | } |
3133 | EXPORT_SYMBOL(drm_atomic_helper_disable_all); | |
3134 | ||
18dddadc DV |
3135 | /** |
3136 | * drm_atomic_helper_shutdown - shutdown all CRTC | |
3137 | * @dev: DRM device | |
3138 | * | |
3139 | * This shuts down all CRTC, which is useful for driver unloading. Shutdown on | |
3140 | * suspend should instead be handled with drm_atomic_helper_suspend(), since | |
3141 | * that also takes a snapshot of the modeset state to be restored on resume. | |
3142 | * | |
3143 | * This is just a convenience wrapper around drm_atomic_helper_disable_all(), | |
3144 | * and it is the atomic version of drm_crtc_force_disable_all(). | |
3145 | */ | |
3146 | void drm_atomic_helper_shutdown(struct drm_device *dev) | |
3147 | { | |
3148 | struct drm_modeset_acquire_ctx ctx; | |
3149 | int ret; | |
3150 | ||
b7ea04d2 | 3151 | DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret); |
18dddadc | 3152 | |
37406a60 | 3153 | ret = drm_atomic_helper_disable_all(dev, &ctx); |
18dddadc | 3154 | if (ret) |
6e22dc35 CS |
3155 | drm_err(dev, |
3156 | "Disabling all crtc's during unload failed with %i\n", | |
3157 | ret); | |
18dddadc | 3158 | |
77ef3857 | 3159 | DRM_MODESET_LOCK_ALL_END(dev, ctx, ret); |
18dddadc DV |
3160 | } |
3161 | EXPORT_SYMBOL(drm_atomic_helper_shutdown); | |
3162 | ||
1d8224e7 DV |
3163 | /** |
3164 | * drm_atomic_helper_duplicate_state - duplicate an atomic state object | |
3165 | * @dev: DRM device | |
3166 | * @ctx: lock acquisition context | |
3167 | * | |
3168 | * Makes a copy of the current atomic state by looping over all objects and | |
3169 | * duplicating their respective states. This is used for example by suspend/ | |
3170 | * resume support code to save the state prior to suspend such that it can | |
3171 | * be restored upon resume. | |
3172 | * | |
3173 | * Note that this treats atomic state as persistent between save and restore. | |
3174 | * Drivers must make sure that this is possible and won't result in confusion | |
3175 | * or erroneous behaviour. | |
3176 | * | |
3177 | * Note that if callers haven't already acquired all modeset locks this might | |
3178 | * return -EDEADLK, which must be handled by calling drm_modeset_backoff(). | |
3179 | * | |
3180 | * Returns: | |
3181 | * A pointer to the copy of the atomic state object on success or an | |
3182 | * ERR_PTR()-encoded error code on failure. | |
3183 | * | |
3184 | * See also: | |
3185 | * drm_atomic_helper_suspend(), drm_atomic_helper_resume() | |
3186 | */ | |
3187 | struct drm_atomic_state * | |
3188 | drm_atomic_helper_duplicate_state(struct drm_device *dev, | |
3189 | struct drm_modeset_acquire_ctx *ctx) | |
3190 | { | |
3191 | struct drm_atomic_state *state; | |
3192 | struct drm_connector *conn; | |
3193 | struct drm_connector_list_iter conn_iter; | |
3194 | struct drm_plane *plane; | |
3195 | struct drm_crtc *crtc; | |
3196 | int err = 0; | |
3197 | ||
3198 | state = drm_atomic_state_alloc(dev); | |
3199 | if (!state) | |
3200 | return ERR_PTR(-ENOMEM); | |
3201 | ||
3202 | state->acquire_ctx = ctx; | |
022debad | 3203 | state->duplicated = true; |
1d8224e7 DV |
3204 | |
3205 | drm_for_each_crtc(crtc, dev) { | |
3206 | struct drm_crtc_state *crtc_state; | |
3207 | ||
3208 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3209 | if (IS_ERR(crtc_state)) { | |
3210 | err = PTR_ERR(crtc_state); | |
3211 | goto free; | |
3212 | } | |
3213 | } | |
3214 | ||
3215 | drm_for_each_plane(plane, dev) { | |
3216 | struct drm_plane_state *plane_state; | |
3217 | ||
3218 | plane_state = drm_atomic_get_plane_state(state, plane); | |
3219 | if (IS_ERR(plane_state)) { | |
3220 | err = PTR_ERR(plane_state); | |
3221 | goto free; | |
3222 | } | |
3223 | } | |
3224 | ||
3225 | drm_connector_list_iter_begin(dev, &conn_iter); | |
3226 | drm_for_each_connector_iter(conn, &conn_iter) { | |
3227 | struct drm_connector_state *conn_state; | |
3228 | ||
3229 | conn_state = drm_atomic_get_connector_state(state, conn); | |
3230 | if (IS_ERR(conn_state)) { | |
3231 | err = PTR_ERR(conn_state); | |
3232 | drm_connector_list_iter_end(&conn_iter); | |
3233 | goto free; | |
3234 | } | |
3235 | } | |
3236 | drm_connector_list_iter_end(&conn_iter); | |
3237 | ||
3238 | /* clear the acquire context so that it isn't accidentally reused */ | |
3239 | state->acquire_ctx = NULL; | |
3240 | ||
3241 | free: | |
3242 | if (err < 0) { | |
3243 | drm_atomic_state_put(state); | |
3244 | state = ERR_PTR(err); | |
3245 | } | |
3246 | ||
3247 | return state; | |
3248 | } | |
3249 | EXPORT_SYMBOL(drm_atomic_helper_duplicate_state); | |
3250 | ||
14942760 TR |
3251 | /** |
3252 | * drm_atomic_helper_suspend - subsystem-level suspend helper | |
3253 | * @dev: DRM device | |
3254 | * | |
3255 | * Duplicates the current atomic state, disables all active outputs and then | |
3256 | * returns a pointer to the original atomic state to the caller. Drivers can | |
3257 | * pass this pointer to the drm_atomic_helper_resume() helper upon resume to | |
3258 | * restore the output configuration that was active at the time the system | |
3259 | * entered suspend. | |
3260 | * | |
3261 | * Note that it is potentially unsafe to use this. The atomic state object | |
3262 | * returned by this function is assumed to be persistent. Drivers must ensure | |
3263 | * that this holds true. Before calling this function, drivers must make sure | |
3264 | * to suspend fbdev emulation so that nothing can be using the device. | |
3265 | * | |
3266 | * Returns: | |
3267 | * A pointer to a copy of the state before suspend on success or an ERR_PTR()- | |
3268 | * encoded error code on failure. Drivers should store the returned atomic | |
3269 | * state object and pass it to the drm_atomic_helper_resume() helper upon | |
3270 | * resume. | |
3271 | * | |
3272 | * See also: | |
3273 | * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(), | |
581e49fe | 3274 | * drm_atomic_helper_resume(), drm_atomic_helper_commit_duplicated_state() |
14942760 TR |
3275 | */ |
3276 | struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev) | |
3277 | { | |
3278 | struct drm_modeset_acquire_ctx ctx; | |
3279 | struct drm_atomic_state *state; | |
3280 | int err; | |
3281 | ||
615aa3d9 SP |
3282 | /* This can never be returned, but it makes the compiler happy */ |
3283 | state = ERR_PTR(-EINVAL); | |
14942760 | 3284 | |
b7ea04d2 | 3285 | DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err); |
14942760 TR |
3286 | |
3287 | state = drm_atomic_helper_duplicate_state(dev, &ctx); | |
3288 | if (IS_ERR(state)) | |
3289 | goto unlock; | |
3290 | ||
3291 | err = drm_atomic_helper_disable_all(dev, &ctx); | |
3292 | if (err < 0) { | |
0853695c | 3293 | drm_atomic_state_put(state); |
14942760 TR |
3294 | state = ERR_PTR(err); |
3295 | goto unlock; | |
3296 | } | |
3297 | ||
3298 | unlock: | |
77ef3857 | 3299 | DRM_MODESET_LOCK_ALL_END(dev, ctx, err); |
b7ea04d2 SP |
3300 | if (err) |
3301 | return ERR_PTR(err); | |
14942760 | 3302 | |
14942760 TR |
3303 | return state; |
3304 | } | |
3305 | EXPORT_SYMBOL(drm_atomic_helper_suspend); | |
3306 | ||
581e49fe ML |
3307 | /** |
3308 | * drm_atomic_helper_commit_duplicated_state - commit duplicated state | |
3309 | * @state: duplicated atomic state to commit | |
3310 | * @ctx: pointer to acquire_ctx to use for commit. | |
3311 | * | |
3312 | * The state returned by drm_atomic_helper_duplicate_state() and | |
3313 | * drm_atomic_helper_suspend() is partially invalid, and needs to | |
3314 | * be fixed up before commit. | |
3315 | * | |
3316 | * Returns: | |
3317 | * 0 on success or a negative error code on failure. | |
3318 | * | |
3319 | * See also: | |
3320 | * drm_atomic_helper_suspend() | |
3321 | */ | |
3322 | int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state, | |
3323 | struct drm_modeset_acquire_ctx *ctx) | |
3324 | { | |
aa394b0d | 3325 | int i, ret; |
581e49fe | 3326 | struct drm_plane *plane; |
415c3ac3 | 3327 | struct drm_plane_state *new_plane_state; |
581e49fe | 3328 | struct drm_connector *connector; |
415c3ac3 | 3329 | struct drm_connector_state *new_conn_state; |
581e49fe | 3330 | struct drm_crtc *crtc; |
415c3ac3 | 3331 | struct drm_crtc_state *new_crtc_state; |
581e49fe ML |
3332 | |
3333 | state->acquire_ctx = ctx; | |
3334 | ||
e00fb856 | 3335 | for_each_new_plane_in_state(state, plane, new_plane_state, i) |
581e49fe ML |
3336 | state->planes[i].old_state = plane->state; |
3337 | ||
415c3ac3 | 3338 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) |
581e49fe ML |
3339 | state->crtcs[i].old_state = crtc->state; |
3340 | ||
415c3ac3 | 3341 | for_each_new_connector_in_state(state, connector, new_conn_state, i) |
581e49fe ML |
3342 | state->connectors[i].old_state = connector->state; |
3343 | ||
aa394b0d SP |
3344 | ret = drm_atomic_commit(state); |
3345 | ||
3346 | state->acquire_ctx = NULL; | |
3347 | ||
3348 | return ret; | |
581e49fe ML |
3349 | } |
3350 | EXPORT_SYMBOL(drm_atomic_helper_commit_duplicated_state); | |
3351 | ||
14942760 TR |
3352 | /** |
3353 | * drm_atomic_helper_resume - subsystem-level resume helper | |
3354 | * @dev: DRM device | |
3355 | * @state: atomic state to resume to | |
3356 | * | |
3357 | * Calls drm_mode_config_reset() to synchronize hardware and software states, | |
3358 | * grabs all modeset locks and commits the atomic state object. This can be | |
3359 | * used in conjunction with the drm_atomic_helper_suspend() helper to | |
3360 | * implement suspend/resume for drivers that support atomic mode-setting. | |
3361 | * | |
3362 | * Returns: | |
3363 | * 0 on success or a negative error code on failure. | |
3364 | * | |
3365 | * See also: | |
3366 | * drm_atomic_helper_suspend() | |
3367 | */ | |
3368 | int drm_atomic_helper_resume(struct drm_device *dev, | |
3369 | struct drm_atomic_state *state) | |
3370 | { | |
a5b8444e | 3371 | struct drm_modeset_acquire_ctx ctx; |
14942760 TR |
3372 | int err; |
3373 | ||
3374 | drm_mode_config_reset(dev); | |
581e49fe | 3375 | |
b7ea04d2 | 3376 | DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err); |
869e188a | 3377 | |
b7ea04d2 | 3378 | err = drm_atomic_helper_commit_duplicated_state(state, &ctx); |
a5b8444e | 3379 | |
77ef3857 | 3380 | DRM_MODESET_LOCK_ALL_END(dev, ctx, err); |
6d281b1f | 3381 | drm_atomic_state_put(state); |
14942760 TR |
3382 | |
3383 | return err; | |
3384 | } | |
3385 | EXPORT_SYMBOL(drm_atomic_helper_resume); | |
3386 | ||
8c3a8181 DV |
3387 | static int page_flip_common(struct drm_atomic_state *state, |
3388 | struct drm_crtc *crtc, | |
3389 | struct drm_framebuffer *fb, | |
3390 | struct drm_pending_vblank_event *event, | |
3391 | uint32_t flags) | |
f869a6ec AG |
3392 | { |
3393 | struct drm_plane *plane = crtc->primary; | |
3394 | struct drm_plane_state *plane_state; | |
3395 | struct drm_crtc_state *crtc_state; | |
3396 | int ret = 0; | |
3397 | ||
3398 | crtc_state = drm_atomic_get_crtc_state(state, crtc); | |
3399 | if (IS_ERR(crtc_state)) | |
3400 | return PTR_ERR(crtc_state); | |
3401 | ||
3402 | crtc_state->event = event; | |
4d85f45c | 3403 | crtc_state->async_flip = flags & DRM_MODE_PAGE_FLIP_ASYNC; |
f869a6ec AG |
3404 | |
3405 | plane_state = drm_atomic_get_plane_state(state, plane); | |
3406 | if (IS_ERR(plane_state)) | |
3407 | return PTR_ERR(plane_state); | |
3408 | ||
f869a6ec AG |
3409 | ret = drm_atomic_set_crtc_for_plane(plane_state, crtc); |
3410 | if (ret != 0) | |
3411 | return ret; | |
3412 | drm_atomic_set_fb_for_plane(plane_state, fb); | |
3413 | ||
3414 | /* Make sure we don't accidentally do a full modeset. */ | |
3415 | state->allow_modeset = false; | |
3416 | if (!crtc_state->active) { | |
6e22dc35 CS |
3417 | drm_dbg_atomic(crtc->dev, |
3418 | "[CRTC:%d:%s] disabled, rejecting legacy flip\n", | |
3419 | crtc->base.id, crtc->name); | |
f869a6ec AG |
3420 | return -EINVAL; |
3421 | } | |
3422 | ||
3423 | return ret; | |
3424 | } | |
3425 | ||
8bc0f312 DV |
3426 | /** |
3427 | * drm_atomic_helper_page_flip - execute a legacy page flip | |
42240c90 | 3428 | * @crtc: DRM CRTC |
8bc0f312 DV |
3429 | * @fb: DRM framebuffer |
3430 | * @event: optional DRM event to signal upon completion | |
3431 | * @flags: flip flags for non-vblank sync'ed updates | |
41292b1f | 3432 | * @ctx: lock acquisition context |
8bc0f312 | 3433 | * |
f869a6ec AG |
3434 | * Provides a default &drm_crtc_funcs.page_flip implementation |
3435 | * using the atomic driver interface. | |
8bc0f312 | 3436 | * |
8bc0f312 DV |
3437 | * Returns: |
3438 | * Returns 0 on success, negative errno numbers on failure. | |
f869a6ec AG |
3439 | * |
3440 | * See also: | |
3441 | * drm_atomic_helper_page_flip_target() | |
8bc0f312 DV |
3442 | */ |
3443 | int drm_atomic_helper_page_flip(struct drm_crtc *crtc, | |
3444 | struct drm_framebuffer *fb, | |
3445 | struct drm_pending_vblank_event *event, | |
41292b1f DV |
3446 | uint32_t flags, |
3447 | struct drm_modeset_acquire_ctx *ctx) | |
8bc0f312 DV |
3448 | { |
3449 | struct drm_plane *plane = crtc->primary; | |
3450 | struct drm_atomic_state *state; | |
8bc0f312 DV |
3451 | int ret = 0; |
3452 | ||
8bc0f312 DV |
3453 | state = drm_atomic_state_alloc(plane->dev); |
3454 | if (!state) | |
3455 | return -ENOMEM; | |
3456 | ||
043e7fb6 | 3457 | state->acquire_ctx = ctx; |
f869a6ec | 3458 | |
6cbe5c46 | 3459 | ret = page_flip_common(state, crtc, fb, event, flags); |
f869a6ec | 3460 | if (ret != 0) |
8bc0f312 | 3461 | goto fail; |
8bc0f312 | 3462 | |
f869a6ec | 3463 | ret = drm_atomic_nonblocking_commit(state); |
f869a6ec | 3464 | fail: |
f869a6ec AG |
3465 | drm_atomic_state_put(state); |
3466 | return ret; | |
f869a6ec AG |
3467 | } |
3468 | EXPORT_SYMBOL(drm_atomic_helper_page_flip); | |
3469 | ||
3470 | /** | |
3471 | * drm_atomic_helper_page_flip_target - do page flip on target vblank period. | |
42240c90 | 3472 | * @crtc: DRM CRTC |
f869a6ec AG |
3473 | * @fb: DRM framebuffer |
3474 | * @event: optional DRM event to signal upon completion | |
3475 | * @flags: flip flags for non-vblank sync'ed updates | |
3476 | * @target: specifying the target vblank period when the flip to take effect | |
41292b1f | 3477 | * @ctx: lock acquisition context |
f869a6ec AG |
3478 | * |
3479 | * Provides a default &drm_crtc_funcs.page_flip_target implementation. | |
3480 | * Similar to drm_atomic_helper_page_flip() with extra parameter to specify | |
3481 | * target vblank period to flip. | |
3482 | * | |
3483 | * Returns: | |
3484 | * Returns 0 on success, negative errno numbers on failure. | |
3485 | */ | |
8c3a8181 DV |
3486 | int drm_atomic_helper_page_flip_target(struct drm_crtc *crtc, |
3487 | struct drm_framebuffer *fb, | |
3488 | struct drm_pending_vblank_event *event, | |
3489 | uint32_t flags, | |
3490 | uint32_t target, | |
3491 | struct drm_modeset_acquire_ctx *ctx) | |
f869a6ec AG |
3492 | { |
3493 | struct drm_plane *plane = crtc->primary; | |
3494 | struct drm_atomic_state *state; | |
3495 | struct drm_crtc_state *crtc_state; | |
3496 | int ret = 0; | |
3497 | ||
f869a6ec AG |
3498 | state = drm_atomic_state_alloc(plane->dev); |
3499 | if (!state) | |
3500 | return -ENOMEM; | |
3501 | ||
043e7fb6 | 3502 | state->acquire_ctx = ctx; |
f869a6ec | 3503 | |
6cbe5c46 | 3504 | ret = page_flip_common(state, crtc, fb, event, flags); |
8bc0f312 DV |
3505 | if (ret != 0) |
3506 | goto fail; | |
8bc0f312 | 3507 | |
b4d93679 | 3508 | crtc_state = drm_atomic_get_new_crtc_state(state, crtc); |
f869a6ec | 3509 | if (WARN_ON(!crtc_state)) { |
4cba6850 DV |
3510 | ret = -EINVAL; |
3511 | goto fail; | |
3512 | } | |
f869a6ec | 3513 | crtc_state->target_vblank = target; |
4cba6850 | 3514 | |
b837ba0a | 3515 | ret = drm_atomic_nonblocking_commit(state); |
8bc0f312 | 3516 | fail: |
0853695c | 3517 | drm_atomic_state_put(state); |
8bc0f312 | 3518 | return ret; |
8bc0f312 | 3519 | } |
f869a6ec | 3520 | EXPORT_SYMBOL(drm_atomic_helper_page_flip_target); |
1d8224e7 | 3521 | |
f32df58a BB |
3522 | /** |
3523 | * drm_atomic_helper_bridge_propagate_bus_fmt() - Propagate output format to | |
3524 | * the input end of a bridge | |
3525 | * @bridge: bridge control structure | |
3526 | * @bridge_state: new bridge state | |
3527 | * @crtc_state: new CRTC state | |
3528 | * @conn_state: new connector state | |
3529 | * @output_fmt: tested output bus format | |
3530 | * @num_input_fmts: will contain the size of the returned array | |
3531 | * | |
3532 | * This helper is a pluggable implementation of the | |
3533 | * &drm_bridge_funcs.atomic_get_input_bus_fmts operation for bridges that don't | |
3534 | * modify the bus configuration between their input and their output. It | |
3535 | * returns an array of input formats with a single element set to @output_fmt. | |
3536 | * | |
3537 | * RETURNS: | |
3538 | * a valid format array of size @num_input_fmts, or NULL if the allocation | |
3539 | * failed | |
3540 | */ | |
3541 | u32 * | |
3542 | drm_atomic_helper_bridge_propagate_bus_fmt(struct drm_bridge *bridge, | |
3543 | struct drm_bridge_state *bridge_state, | |
3544 | struct drm_crtc_state *crtc_state, | |
3545 | struct drm_connector_state *conn_state, | |
3546 | u32 output_fmt, | |
3547 | unsigned int *num_input_fmts) | |
3548 | { | |
3549 | u32 *input_fmts; | |
3550 | ||
3551 | input_fmts = kzalloc(sizeof(*input_fmts), GFP_KERNEL); | |
3552 | if (!input_fmts) { | |
3553 | *num_input_fmts = 0; | |
3554 | return NULL; | |
3555 | } | |
3556 | ||
3557 | *num_input_fmts = 1; | |
3558 | input_fmts[0] = output_fmt; | |
3559 | return input_fmts; | |
3560 | } | |
3561 | EXPORT_SYMBOL(drm_atomic_helper_bridge_propagate_bus_fmt); |