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1 : : /*
2 : : * Copyright (C) 2014 Red Hat
3 : : * Copyright (C) 2014 Intel Corp.
4 : : *
5 : : * Permission is hereby granted, free of charge, to any person obtaining a
6 : : * copy of this software and associated documentation files (the "Software"),
7 : : * to deal in the Software without restriction, including without limitation
8 : : * the rights to use, copy, modify, merge, publish, distribute, sublicense,
9 : : * and/or sell copies of the Software, and to permit persons to whom the
10 : : * Software is furnished to do so, subject to the following conditions:
11 : : *
12 : : * The above copyright notice and this permission notice shall be included in
13 : : * all copies or substantial portions of the Software.
14 : : *
15 : : * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
16 : : * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
17 : : * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
18 : : * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
19 : : * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
20 : : * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
21 : : * OTHER DEALINGS IN THE SOFTWARE.
22 : : *
23 : : * Authors:
24 : : * Rob Clark <robdclark@gmail.com>
25 : : * Daniel Vetter <daniel.vetter@ffwll.ch>
26 : : */
27 : :
28 : : #include <linux/dma-fence.h>
29 : : #include <linux/ktime.h>
30 : :
31 : : #include <drm/drm_atomic.h>
32 : : #include <drm/drm_atomic_helper.h>
33 : : #include <drm/drm_atomic_uapi.h>
34 : : #include <drm/drm_bridge.h>
35 : : #include <drm/drm_damage_helper.h>
36 : : #include <drm/drm_device.h>
37 : : #include <drm/drm_plane_helper.h>
38 : : #include <drm/drm_print.h>
39 : : #include <drm/drm_self_refresh_helper.h>
40 : : #include <drm/drm_vblank.h>
41 : : #include <drm/drm_writeback.h>
42 : :
43 : : #include "drm_crtc_helper_internal.h"
44 : : #include "drm_crtc_internal.h"
45 : :
46 : : /**
47 : : * DOC: overview
48 : : *
49 : : * This helper library provides implementations of check and commit functions on
50 : : * top of the CRTC modeset helper callbacks and the plane helper callbacks. It
51 : : * also provides convenience implementations for the atomic state handling
52 : : * callbacks for drivers which don't need to subclass the drm core structures to
53 : : * add their own additional internal state.
54 : : *
55 : : * This library also provides default implementations for the check callback in
56 : : * drm_atomic_helper_check() and for the commit callback with
57 : : * drm_atomic_helper_commit(). But the individual stages and callbacks are
58 : : * exposed to allow drivers to mix and match and e.g. use the plane helpers only
59 : : * together with a driver private modeset implementation.
60 : : *
61 : : * This library also provides implementations for all the legacy driver
62 : : * interfaces on top of the atomic interface. See drm_atomic_helper_set_config(),
63 : : * drm_atomic_helper_disable_plane(), drm_atomic_helper_disable_plane() and the
64 : : * various functions to implement set_property callbacks. New drivers must not
65 : : * implement these functions themselves but must use the provided helpers.
66 : : *
67 : : * The atomic helper uses the same function table structures as all other
68 : : * modesetting helpers. See the documentation for &struct drm_crtc_helper_funcs,
69 : : * struct &drm_encoder_helper_funcs and &struct drm_connector_helper_funcs. It
70 : : * also shares the &struct drm_plane_helper_funcs function table with the plane
71 : : * helpers.
72 : : */
73 : : static void
74 : : drm_atomic_helper_plane_changed(struct drm_atomic_state *state,
75 : : struct drm_plane_state *old_plane_state,
76 : : struct drm_plane_state *plane_state,
77 : : struct drm_plane *plane)
78 : : {
79 : : struct drm_crtc_state *crtc_state;
80 : :
81 : : if (old_plane_state->crtc) {
82 : : crtc_state = drm_atomic_get_new_crtc_state(state,
83 : : old_plane_state->crtc);
84 : :
85 : : if (WARN_ON(!crtc_state))
86 : : return;
87 : :
88 : : crtc_state->planes_changed = true;
89 : : }
90 : :
91 : : if (plane_state->crtc) {
92 : : crtc_state = drm_atomic_get_new_crtc_state(state, plane_state->crtc);
93 : :
94 : : if (WARN_ON(!crtc_state))
95 : : return;
96 : :
97 : : crtc_state->planes_changed = true;
98 : : }
99 : : }
100 : :
101 : 0 : static int handle_conflicting_encoders(struct drm_atomic_state *state,
102 : : bool disable_conflicting_encoders)
103 : : {
104 : 0 : struct drm_connector_state *new_conn_state;
105 : 0 : struct drm_connector *connector;
106 : 0 : struct drm_connector_list_iter conn_iter;
107 : 0 : struct drm_encoder *encoder;
108 : 0 : unsigned encoder_mask = 0;
109 : 0 : int i, ret = 0;
110 : :
111 : : /*
112 : : * First loop, find all newly assigned encoders from the connectors
113 : : * part of the state. If the same encoder is assigned to multiple
114 : : * connectors bail out.
115 : : */
116 [ # # # # ]: 0 : for_each_new_connector_in_state(state, connector, new_conn_state, i) {
117 : 0 : const struct drm_connector_helper_funcs *funcs = connector->helper_private;
118 : 0 : struct drm_encoder *new_encoder;
119 : :
120 [ # # ]: 0 : if (!new_conn_state->crtc)
121 : 0 : continue;
122 : :
123 [ # # ]: 0 : if (funcs->atomic_best_encoder)
124 : 0 : new_encoder = funcs->atomic_best_encoder(connector, new_conn_state);
125 [ # # ]: 0 : else if (funcs->best_encoder)
126 : 0 : new_encoder = funcs->best_encoder(connector);
127 : : else
128 : 0 : new_encoder = drm_connector_get_single_encoder(connector);
129 : :
130 [ # # ]: 0 : if (new_encoder) {
131 [ # # ]: 0 : if (encoder_mask & drm_encoder_mask(new_encoder)) {
132 : 0 : DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] on [CONNECTOR:%d:%s] already assigned\n",
133 : : new_encoder->base.id, new_encoder->name,
134 : : connector->base.id, connector->name);
135 : :
136 : 0 : return -EINVAL;
137 : : }
138 : :
139 : 0 : encoder_mask |= drm_encoder_mask(new_encoder);
140 : : }
141 : : }
142 : :
143 [ # # ]: 0 : if (!encoder_mask)
144 : : return 0;
145 : :
146 : : /*
147 : : * Second loop, iterate over all connectors not part of the state.
148 : : *
149 : : * If a conflicting encoder is found and disable_conflicting_encoders
150 : : * is not set, an error is returned. Userspace can provide a solution
151 : : * through the atomic ioctl.
152 : : *
153 : : * If the flag is set conflicting connectors are removed from the CRTC
154 : : * and the CRTC is disabled if no encoder is left. This preserves
155 : : * compatibility with the legacy set_config behavior.
156 : : */
157 : 0 : drm_connector_list_iter_begin(state->dev, &conn_iter);
158 [ # # ]: 0 : drm_for_each_connector_iter(connector, &conn_iter) {
159 : 0 : struct drm_crtc_state *crtc_state;
160 : :
161 [ # # # # ]: 0 : if (drm_atomic_get_new_connector_state(state, connector))
162 : 0 : continue;
163 : :
164 : 0 : encoder = connector->state->best_encoder;
165 [ # # # # ]: 0 : if (!encoder || !(encoder_mask & drm_encoder_mask(encoder)))
166 : 0 : continue;
167 : :
168 [ # # ]: 0 : if (!disable_conflicting_encoders) {
169 : 0 : DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s] by [CONNECTOR:%d:%s]\n",
170 : : encoder->base.id, encoder->name,
171 : : connector->state->crtc->base.id,
172 : : connector->state->crtc->name,
173 : : connector->base.id, connector->name);
174 : 0 : ret = -EINVAL;
175 : 0 : goto out;
176 : : }
177 : :
178 : 0 : new_conn_state = drm_atomic_get_connector_state(state, connector);
179 [ # # ]: 0 : if (IS_ERR(new_conn_state)) {
180 : 0 : ret = PTR_ERR(new_conn_state);
181 : 0 : goto out;
182 : : }
183 : :
184 : 0 : DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], disabling [CONNECTOR:%d:%s]\n",
185 : : encoder->base.id, encoder->name,
186 : : new_conn_state->crtc->base.id, new_conn_state->crtc->name,
187 : : connector->base.id, connector->name);
188 : :
189 : 0 : crtc_state = drm_atomic_get_new_crtc_state(state, new_conn_state->crtc);
190 : :
191 : 0 : ret = drm_atomic_set_crtc_for_connector(new_conn_state, NULL);
192 [ # # ]: 0 : if (ret)
193 : 0 : goto out;
194 : :
195 [ # # ]: 0 : if (!crtc_state->connector_mask) {
196 : 0 : ret = drm_atomic_set_mode_prop_for_crtc(crtc_state,
197 : : NULL);
198 [ # # ]: 0 : if (ret < 0)
199 : 0 : goto out;
200 : :
201 : 0 : crtc_state->active = false;
202 : : }
203 : : }
204 : 0 : out:
205 : 0 : drm_connector_list_iter_end(&conn_iter);
206 : :
207 : 0 : return ret;
208 : : }
209 : :
210 : : static void
211 : 0 : set_best_encoder(struct drm_atomic_state *state,
212 : : struct drm_connector_state *conn_state,
213 : : struct drm_encoder *encoder)
214 : : {
215 : 0 : struct drm_crtc_state *crtc_state;
216 : 0 : struct drm_crtc *crtc;
217 : :
218 [ # # ]: 0 : if (conn_state->best_encoder) {
219 : : /* Unset the encoder_mask in the old crtc state. */
220 : 0 : crtc = conn_state->connector->state->crtc;
221 : :
222 : : /* A NULL crtc is an error here because we should have
223 : : * duplicated a NULL best_encoder when crtc was NULL.
224 : : * As an exception restoring duplicated atomic state
225 : : * during resume is allowed, so don't warn when
226 : : * best_encoder is equal to encoder we intend to set.
227 : : */
228 [ # # # # : 0 : WARN_ON(!crtc && encoder != conn_state->best_encoder);
# # ]
229 [ # # ]: 0 : if (crtc) {
230 : 0 : crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
231 : :
232 : 0 : crtc_state->encoder_mask &=
233 : 0 : ~drm_encoder_mask(conn_state->best_encoder);
234 : : }
235 : : }
236 : :
237 [ # # ]: 0 : if (encoder) {
238 : 0 : crtc = conn_state->crtc;
239 [ # # ]: 0 : WARN_ON(!crtc);
240 [ # # ]: 0 : if (crtc) {
241 : 0 : crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
242 : :
243 : 0 : crtc_state->encoder_mask |=
244 : : drm_encoder_mask(encoder);
245 : : }
246 : : }
247 : :
248 : 0 : conn_state->best_encoder = encoder;
249 : 0 : }
250 : :
251 : : static void
252 : 0 : steal_encoder(struct drm_atomic_state *state,
253 : : struct drm_encoder *encoder)
254 : : {
255 : 0 : struct drm_crtc_state *crtc_state;
256 : 0 : struct drm_connector *connector;
257 : 0 : struct drm_connector_state *old_connector_state, *new_connector_state;
258 : 0 : int i;
259 : :
260 [ # # # # ]: 0 : for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) {
261 : 0 : struct drm_crtc *encoder_crtc;
262 : :
263 [ # # ]: 0 : if (new_connector_state->best_encoder != encoder)
264 : 0 : continue;
265 : :
266 : 0 : encoder_crtc = old_connector_state->crtc;
267 : :
268 : 0 : DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] in use on [CRTC:%d:%s], stealing it\n",
269 : : encoder->base.id, encoder->name,
270 : : encoder_crtc->base.id, encoder_crtc->name);
271 : :
272 : 0 : set_best_encoder(state, new_connector_state, NULL);
273 : :
274 : 0 : crtc_state = drm_atomic_get_new_crtc_state(state, encoder_crtc);
275 : 0 : crtc_state->connectors_changed = true;
276 : :
277 : 0 : return;
278 : : }
279 : : }
280 : :
281 : : static int
282 : : update_connector_routing(struct drm_atomic_state *state,
283 : : struct drm_connector *connector,
284 : : struct drm_connector_state *old_connector_state,
285 : : struct drm_connector_state *new_connector_state)
286 : : {
287 : : const struct drm_connector_helper_funcs *funcs;
288 : : struct drm_encoder *new_encoder;
289 : : struct drm_crtc_state *crtc_state;
290 : :
291 : : DRM_DEBUG_ATOMIC("Updating routing for [CONNECTOR:%d:%s]\n",
292 : : connector->base.id,
293 : : connector->name);
294 : :
295 : : if (old_connector_state->crtc != new_connector_state->crtc) {
296 : : if (old_connector_state->crtc) {
297 : : crtc_state = drm_atomic_get_new_crtc_state(state, old_connector_state->crtc);
298 : : crtc_state->connectors_changed = true;
299 : : }
300 : :
301 : : if (new_connector_state->crtc) {
302 : : crtc_state = drm_atomic_get_new_crtc_state(state, new_connector_state->crtc);
303 : : crtc_state->connectors_changed = true;
304 : : }
305 : : }
306 : :
307 : : if (!new_connector_state->crtc) {
308 : : DRM_DEBUG_ATOMIC("Disabling [CONNECTOR:%d:%s]\n",
309 : : connector->base.id,
310 : : connector->name);
311 : :
312 : : set_best_encoder(state, new_connector_state, NULL);
313 : :
314 : : return 0;
315 : : }
316 : :
317 : : crtc_state = drm_atomic_get_new_crtc_state(state,
318 : : new_connector_state->crtc);
319 : : /*
320 : : * For compatibility with legacy users, we want to make sure that
321 : : * we allow DPMS On->Off modesets on unregistered connectors. Modesets
322 : : * which would result in anything else must be considered invalid, to
323 : : * avoid turning on new displays on dead connectors.
324 : : *
325 : : * Since the connector can be unregistered at any point during an
326 : : * atomic check or commit, this is racy. But that's OK: all we care
327 : : * about is ensuring that userspace can't do anything but shut off the
328 : : * display on a connector that was destroyed after it's been notified,
329 : : * not before.
330 : : *
331 : : * Additionally, we also want to ignore connector registration when
332 : : * we're trying to restore an atomic state during system resume since
333 : : * there's a chance the connector may have been destroyed during the
334 : : * process, but it's better to ignore that then cause
335 : : * drm_atomic_helper_resume() to fail.
336 : : */
337 : : if (!state->duplicated && drm_connector_is_unregistered(connector) &&
338 : : crtc_state->active) {
339 : : DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] is not registered\n",
340 : : connector->base.id, connector->name);
341 : : return -EINVAL;
342 : : }
343 : :
344 : : funcs = connector->helper_private;
345 : :
346 : : if (funcs->atomic_best_encoder)
347 : : new_encoder = funcs->atomic_best_encoder(connector,
348 : : new_connector_state);
349 : : else if (funcs->best_encoder)
350 : : new_encoder = funcs->best_encoder(connector);
351 : : else
352 : : new_encoder = drm_connector_get_single_encoder(connector);
353 : :
354 : : if (!new_encoder) {
355 : : DRM_DEBUG_ATOMIC("No suitable encoder found for [CONNECTOR:%d:%s]\n",
356 : : connector->base.id,
357 : : connector->name);
358 : : return -EINVAL;
359 : : }
360 : :
361 : : if (!drm_encoder_crtc_ok(new_encoder, new_connector_state->crtc)) {
362 : : DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] incompatible with [CRTC:%d:%s]\n",
363 : : new_encoder->base.id,
364 : : new_encoder->name,
365 : : new_connector_state->crtc->base.id,
366 : : new_connector_state->crtc->name);
367 : : return -EINVAL;
368 : : }
369 : :
370 : : if (new_encoder == new_connector_state->best_encoder) {
371 : : set_best_encoder(state, new_connector_state, new_encoder);
372 : :
373 : : DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] keeps [ENCODER:%d:%s], now on [CRTC:%d:%s]\n",
374 : : connector->base.id,
375 : : connector->name,
376 : : new_encoder->base.id,
377 : : new_encoder->name,
378 : : new_connector_state->crtc->base.id,
379 : : new_connector_state->crtc->name);
380 : :
381 : : return 0;
382 : : }
383 : :
384 : : steal_encoder(state, new_encoder);
385 : :
386 : : set_best_encoder(state, new_connector_state, new_encoder);
387 : :
388 : : crtc_state->connectors_changed = true;
389 : :
390 : : DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] using [ENCODER:%d:%s] on [CRTC:%d:%s]\n",
391 : : connector->base.id,
392 : : connector->name,
393 : : new_encoder->base.id,
394 : : new_encoder->name,
395 : : new_connector_state->crtc->base.id,
396 : : new_connector_state->crtc->name);
397 : :
398 : : return 0;
399 : : }
400 : :
401 : : static int
402 : 0 : mode_fixup(struct drm_atomic_state *state)
403 : : {
404 : 0 : struct drm_crtc *crtc;
405 : 0 : struct drm_crtc_state *new_crtc_state;
406 : 0 : struct drm_connector *connector;
407 : 0 : struct drm_connector_state *new_conn_state;
408 : 0 : int i;
409 : 0 : int ret;
410 : :
411 [ # # # # ]: 0 : for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
412 [ # # ]: 0 : if (!new_crtc_state->mode_changed &&
413 [ # # ]: 0 : !new_crtc_state->connectors_changed)
414 : 0 : continue;
415 : :
416 : 0 : drm_mode_copy(&new_crtc_state->adjusted_mode, &new_crtc_state->mode);
417 : : }
418 : :
419 [ # # # # ]: 0 : for_each_new_connector_in_state(state, connector, new_conn_state, i) {
420 : 0 : const struct drm_encoder_helper_funcs *funcs;
421 : 0 : struct drm_encoder *encoder;
422 : 0 : struct drm_bridge *bridge;
423 : :
424 [ # # ]: 0 : WARN_ON(!!new_conn_state->best_encoder != !!new_conn_state->crtc);
425 : :
426 [ # # # # ]: 0 : if (!new_conn_state->crtc || !new_conn_state->best_encoder)
427 : 0 : continue;
428 : :
429 : 0 : new_crtc_state =
430 [ # # ]: 0 : drm_atomic_get_new_crtc_state(state, new_conn_state->crtc);
431 : :
432 : : /*
433 : : * Each encoder has at most one connector (since we always steal
434 : : * it away), so we won't call ->mode_fixup twice.
435 : : */
436 : 0 : encoder = new_conn_state->best_encoder;
437 : 0 : funcs = encoder->helper_private;
438 : :
439 [ # # ]: 0 : bridge = drm_bridge_chain_get_first_bridge(encoder);
440 : 0 : ret = drm_bridge_chain_mode_fixup(bridge,
441 : 0 : &new_crtc_state->mode,
442 : : &new_crtc_state->adjusted_mode);
443 [ # # ]: 0 : if (!ret) {
444 : 0 : DRM_DEBUG_ATOMIC("Bridge fixup failed\n");
445 : 0 : return -EINVAL;
446 : : }
447 : :
448 [ # # # # ]: 0 : if (funcs && funcs->atomic_check) {
449 : 0 : ret = funcs->atomic_check(encoder, new_crtc_state,
450 : : new_conn_state);
451 [ # # ]: 0 : if (ret) {
452 : 0 : DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] check failed\n",
453 : : encoder->base.id, encoder->name);
454 : 0 : return ret;
455 : : }
456 [ # # # # ]: 0 : } else if (funcs && funcs->mode_fixup) {
457 : 0 : ret = funcs->mode_fixup(encoder, &new_crtc_state->mode,
458 : : &new_crtc_state->adjusted_mode);
459 [ # # ]: 0 : if (!ret) {
460 : 0 : DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] fixup failed\n",
461 : : encoder->base.id, encoder->name);
462 : 0 : return -EINVAL;
463 : : }
464 : : }
465 : : }
466 : :
467 [ # # # # ]: 0 : for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
468 : 0 : const struct drm_crtc_helper_funcs *funcs;
469 : :
470 [ # # ]: 0 : if (!new_crtc_state->enable)
471 : 0 : continue;
472 : :
473 [ # # ]: 0 : if (!new_crtc_state->mode_changed &&
474 [ # # ]: 0 : !new_crtc_state->connectors_changed)
475 : 0 : continue;
476 : :
477 : 0 : funcs = crtc->helper_private;
478 [ # # # # ]: 0 : if (!funcs || !funcs->mode_fixup)
479 : 0 : continue;
480 : :
481 : 0 : ret = funcs->mode_fixup(crtc, &new_crtc_state->mode,
482 : : &new_crtc_state->adjusted_mode);
483 [ # # ]: 0 : if (!ret) {
484 : 0 : DRM_DEBUG_ATOMIC("[CRTC:%d:%s] fixup failed\n",
485 : : crtc->base.id, crtc->name);
486 : 0 : return -EINVAL;
487 : : }
488 : : }
489 : :
490 : : return 0;
491 : : }
492 : :
493 : : static enum drm_mode_status mode_valid_path(struct drm_connector *connector,
494 : : struct drm_encoder *encoder,
495 : : struct drm_crtc *crtc,
496 : : const struct drm_display_mode *mode)
497 : : {
498 : : struct drm_bridge *bridge;
499 : : enum drm_mode_status ret;
500 : :
501 : : ret = drm_encoder_mode_valid(encoder, mode);
502 : : if (ret != MODE_OK) {
503 : : DRM_DEBUG_ATOMIC("[ENCODER:%d:%s] mode_valid() failed\n",
504 : : encoder->base.id, encoder->name);
505 : : return ret;
506 : : }
507 : :
508 : : bridge = drm_bridge_chain_get_first_bridge(encoder);
509 : : ret = drm_bridge_chain_mode_valid(bridge, mode);
510 : : if (ret != MODE_OK) {
511 : : DRM_DEBUG_ATOMIC("[BRIDGE] mode_valid() failed\n");
512 : : return ret;
513 : : }
514 : :
515 : : ret = drm_crtc_mode_valid(crtc, mode);
516 : : if (ret != MODE_OK) {
517 : : DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode_valid() failed\n",
518 : : crtc->base.id, crtc->name);
519 : : return ret;
520 : : }
521 : :
522 : : return ret;
523 : : }
524 : :
525 : : static int
526 : 0 : mode_valid(struct drm_atomic_state *state)
527 : : {
528 : 0 : struct drm_connector_state *conn_state;
529 : 0 : struct drm_connector *connector;
530 : 0 : int i;
531 : :
532 [ # # # # ]: 0 : for_each_new_connector_in_state(state, connector, conn_state, i) {
533 : 0 : struct drm_encoder *encoder = conn_state->best_encoder;
534 : 0 : struct drm_crtc *crtc = conn_state->crtc;
535 : 0 : struct drm_crtc_state *crtc_state;
536 : 0 : enum drm_mode_status mode_status;
537 : 0 : const struct drm_display_mode *mode;
538 : :
539 [ # # ]: 0 : if (!crtc || !encoder)
540 : 0 : continue;
541 : :
542 [ # # ]: 0 : crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
543 [ # # ]: 0 : if (!crtc_state)
544 : 0 : continue;
545 [ # # # # ]: 0 : if (!crtc_state->mode_changed && !crtc_state->connectors_changed)
546 : 0 : continue;
547 : :
548 : 0 : mode = &crtc_state->mode;
549 : :
550 : 0 : mode_status = mode_valid_path(connector, encoder, crtc, mode);
551 [ # # ]: 0 : if (mode_status != MODE_OK)
552 : : return -EINVAL;
553 : : }
554 : :
555 : : return 0;
556 : : }
557 : :
558 : : /**
559 : : * drm_atomic_helper_check_modeset - validate state object for modeset changes
560 : : * @dev: DRM device
561 : : * @state: the driver state object
562 : : *
563 : : * Check the state object to see if the requested state is physically possible.
564 : : * This does all the CRTC and connector related computations for an atomic
565 : : * update and adds any additional connectors needed for full modesets. It calls
566 : : * the various per-object callbacks in the follow order:
567 : : *
568 : : * 1. &drm_connector_helper_funcs.atomic_best_encoder for determining the new encoder.
569 : : * 2. &drm_connector_helper_funcs.atomic_check to validate the connector state.
570 : : * 3. If it's determined a modeset is needed then all connectors on the affected
571 : : * CRTC are added and &drm_connector_helper_funcs.atomic_check is run on them.
572 : : * 4. &drm_encoder_helper_funcs.mode_valid, &drm_bridge_funcs.mode_valid and
573 : : * &drm_crtc_helper_funcs.mode_valid are called on the affected components.
574 : : * 5. &drm_bridge_funcs.mode_fixup is called on all encoder bridges.
575 : : * 6. &drm_encoder_helper_funcs.atomic_check is called to validate any encoder state.
576 : : * This function is only called when the encoder will be part of a configured CRTC,
577 : : * it must not be used for implementing connector property validation.
578 : : * If this function is NULL, &drm_atomic_encoder_helper_funcs.mode_fixup is called
579 : : * instead.
580 : : * 7. &drm_crtc_helper_funcs.mode_fixup is called last, to fix up the mode with CRTC constraints.
581 : : *
582 : : * &drm_crtc_state.mode_changed is set when the input mode is changed.
583 : : * &drm_crtc_state.connectors_changed is set when a connector is added or
584 : : * removed from the CRTC. &drm_crtc_state.active_changed is set when
585 : : * &drm_crtc_state.active changes, which is used for DPMS.
586 : : * See also: drm_atomic_crtc_needs_modeset()
587 : : *
588 : : * IMPORTANT:
589 : : *
590 : : * Drivers which set &drm_crtc_state.mode_changed (e.g. in their
591 : : * &drm_plane_helper_funcs.atomic_check hooks if a plane update can't be done
592 : : * without a full modeset) _must_ call this function afterwards after that
593 : : * change. It is permitted to call this function multiple times for the same
594 : : * update, e.g. when the &drm_crtc_helper_funcs.atomic_check functions depend
595 : : * upon the adjusted dotclock for fifo space allocation and watermark
596 : : * computation.
597 : : *
598 : : * RETURNS:
599 : : * Zero for success or -errno
600 : : */
601 : : int
602 : 0 : drm_atomic_helper_check_modeset(struct drm_device *dev,
603 : : struct drm_atomic_state *state)
604 : : {
605 : 0 : struct drm_crtc *crtc;
606 : 0 : struct drm_crtc_state *old_crtc_state, *new_crtc_state;
607 : 0 : struct drm_connector *connector;
608 : 0 : struct drm_connector_state *old_connector_state, *new_connector_state;
609 : 0 : int i, ret;
610 : 0 : unsigned connectors_mask = 0;
611 : :
612 [ # # # # ]: 0 : for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
613 : 0 : bool has_connectors =
614 : 0 : !!new_crtc_state->connector_mask;
615 : :
616 [ # # ]: 0 : WARN_ON(!drm_modeset_is_locked(&crtc->mutex));
617 : :
618 [ # # ]: 0 : if (!drm_mode_equal(&old_crtc_state->mode, &new_crtc_state->mode)) {
619 : 0 : DRM_DEBUG_ATOMIC("[CRTC:%d:%s] mode changed\n",
620 : : crtc->base.id, crtc->name);
621 : 0 : new_crtc_state->mode_changed = true;
622 : : }
623 : :
624 [ # # ]: 0 : if (old_crtc_state->enable != new_crtc_state->enable) {
625 : 0 : DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enable changed\n",
626 : : crtc->base.id, crtc->name);
627 : :
628 : : /*
629 : : * For clarity this assignment is done here, but
630 : : * enable == 0 is only true when there are no
631 : : * connectors and a NULL mode.
632 : : *
633 : : * The other way around is true as well. enable != 0
634 : : * iff connectors are attached and a mode is set.
635 : : */
636 : 0 : new_crtc_state->mode_changed = true;
637 : 0 : new_crtc_state->connectors_changed = true;
638 : : }
639 : :
640 [ # # ]: 0 : if (old_crtc_state->active != new_crtc_state->active) {
641 : 0 : DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active changed\n",
642 : : crtc->base.id, crtc->name);
643 : 0 : new_crtc_state->active_changed = true;
644 : : }
645 : :
646 [ # # ]: 0 : if (new_crtc_state->enable != has_connectors) {
647 : 0 : DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled/connectors mismatch\n",
648 : : crtc->base.id, crtc->name);
649 : :
650 : 0 : return -EINVAL;
651 : : }
652 : : }
653 : :
654 : 0 : ret = handle_conflicting_encoders(state, false);
655 [ # # ]: 0 : if (ret)
656 : : return ret;
657 : :
658 [ # # # # ]: 0 : for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) {
659 : 0 : const struct drm_connector_helper_funcs *funcs = connector->helper_private;
660 : :
661 [ # # ]: 0 : WARN_ON(!drm_modeset_is_locked(&dev->mode_config.connection_mutex));
662 : :
663 : : /*
664 : : * This only sets crtc->connectors_changed for routing changes,
665 : : * drivers must set crtc->connectors_changed themselves when
666 : : * connector properties need to be updated.
667 : : */
668 : 0 : ret = update_connector_routing(state, connector,
669 : : old_connector_state,
670 : : new_connector_state);
671 [ # # ]: 0 : if (ret)
672 : 0 : return ret;
673 [ # # ]: 0 : if (old_connector_state->crtc) {
674 [ # # ]: 0 : new_crtc_state = drm_atomic_get_new_crtc_state(state,
675 : : old_connector_state->crtc);
676 : 0 : if (old_connector_state->link_status !=
677 [ # # ]: 0 : new_connector_state->link_status)
678 : 0 : new_crtc_state->connectors_changed = true;
679 : :
680 : 0 : if (old_connector_state->max_requested_bpc !=
681 [ # # ]: 0 : new_connector_state->max_requested_bpc)
682 : 0 : new_crtc_state->connectors_changed = true;
683 : : }
684 : :
685 [ # # ]: 0 : if (funcs->atomic_check)
686 : 0 : ret = funcs->atomic_check(connector, state);
687 [ # # ]: 0 : if (ret)
688 : 0 : return ret;
689 : :
690 : 0 : connectors_mask |= BIT(i);
691 : : }
692 : :
693 : : /*
694 : : * After all the routing has been prepared we need to add in any
695 : : * connector which is itself unchanged, but whose CRTC changes its
696 : : * configuration. This must be done before calling mode_fixup in case a
697 : : * crtc only changed its mode but has the same set of connectors.
698 : : */
699 [ # # # # ]: 0 : for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
700 [ # # ]: 0 : if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
701 : 0 : continue;
702 : :
703 [ # # # # ]: 0 : DRM_DEBUG_ATOMIC("[CRTC:%d:%s] needs all connectors, enable: %c, active: %c\n",
704 : : crtc->base.id, crtc->name,
705 : : new_crtc_state->enable ? 'y' : 'n',
706 : : new_crtc_state->active ? 'y' : 'n');
707 : :
708 : 0 : ret = drm_atomic_add_affected_connectors(state, crtc);
709 [ # # ]: 0 : if (ret != 0)
710 : 0 : return ret;
711 : :
712 : 0 : ret = drm_atomic_add_affected_planes(state, crtc);
713 [ # # ]: 0 : if (ret != 0)
714 : 0 : return ret;
715 : : }
716 : :
717 : : /*
718 : : * Iterate over all connectors again, to make sure atomic_check()
719 : : * has been called on them when a modeset is forced.
720 : : */
721 [ # # # # ]: 0 : for_each_oldnew_connector_in_state(state, connector, old_connector_state, new_connector_state, i) {
722 : 0 : const struct drm_connector_helper_funcs *funcs = connector->helper_private;
723 : :
724 [ # # ]: 0 : if (connectors_mask & BIT(i))
725 : 0 : continue;
726 : :
727 [ # # ]: 0 : if (funcs->atomic_check)
728 : 0 : ret = funcs->atomic_check(connector, state);
729 [ # # ]: 0 : if (ret)
730 : 0 : return ret;
731 : : }
732 : :
733 : 0 : ret = mode_valid(state);
734 [ # # ]: 0 : if (ret)
735 : : return ret;
736 : :
737 : 0 : return mode_fixup(state);
738 : : }
739 : : EXPORT_SYMBOL(drm_atomic_helper_check_modeset);
740 : :
741 : : /**
742 : : * drm_atomic_helper_check_plane_state() - Check plane state for validity
743 : : * @plane_state: plane state to check
744 : : * @crtc_state: CRTC state to check
745 : : * @min_scale: minimum @src:@dest scaling factor in 16.16 fixed point
746 : : * @max_scale: maximum @src:@dest scaling factor in 16.16 fixed point
747 : : * @can_position: is it legal to position the plane such that it
748 : : * doesn't cover the entire CRTC? This will generally
749 : : * only be false for primary planes.
750 : : * @can_update_disabled: can the plane be updated while the CRTC
751 : : * is disabled?
752 : : *
753 : : * Checks that a desired plane update is valid, and updates various
754 : : * bits of derived state (clipped coordinates etc.). Drivers that provide
755 : : * their own plane handling rather than helper-provided implementations may
756 : : * still wish to call this function to avoid duplication of error checking
757 : : * code.
758 : : *
759 : : * RETURNS:
760 : : * Zero if update appears valid, error code on failure
761 : : */
762 : 0 : int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state,
763 : : const struct drm_crtc_state *crtc_state,
764 : : int min_scale,
765 : : int max_scale,
766 : : bool can_position,
767 : : bool can_update_disabled)
768 : : {
769 : 0 : struct drm_framebuffer *fb = plane_state->fb;
770 : 0 : struct drm_rect *src = &plane_state->src;
771 : 0 : struct drm_rect *dst = &plane_state->dst;
772 : 0 : unsigned int rotation = plane_state->rotation;
773 : 0 : struct drm_rect clip = {};
774 : 0 : int hscale, vscale;
775 : :
776 [ # # # # : 0 : WARN_ON(plane_state->crtc && plane_state->crtc != crtc_state->crtc);
# # ]
777 : :
778 [ # # ]: 0 : *src = drm_plane_state_src(plane_state);
779 [ # # ]: 0 : *dst = drm_plane_state_dest(plane_state);
780 : :
781 [ # # ]: 0 : if (!fb) {
782 : 0 : plane_state->visible = false;
783 : 0 : return 0;
784 : : }
785 : :
786 : : /* crtc should only be NULL when disabling (i.e., !fb) */
787 [ # # # # ]: 0 : if (WARN_ON(!plane_state->crtc)) {
788 : 0 : plane_state->visible = false;
789 : 0 : return 0;
790 : : }
791 : :
792 [ # # # # ]: 0 : if (!crtc_state->enable && !can_update_disabled) {
793 : 0 : DRM_DEBUG_KMS("Cannot update plane of a disabled CRTC.\n");
794 : 0 : return -EINVAL;
795 : : }
796 : :
797 : 0 : drm_rect_rotate(src, fb->width << 16, fb->height << 16, rotation);
798 : :
799 : : /* Check scaling */
800 : 0 : hscale = drm_rect_calc_hscale(src, dst, min_scale, max_scale);
801 : 0 : vscale = drm_rect_calc_vscale(src, dst, min_scale, max_scale);
802 [ # # ]: 0 : if (hscale < 0 || vscale < 0) {
803 : 0 : DRM_DEBUG_KMS("Invalid scaling of plane\n");
804 : 0 : drm_rect_debug_print("src: ", &plane_state->src, true);
805 : 0 : drm_rect_debug_print("dst: ", &plane_state->dst, false);
806 : 0 : return -ERANGE;
807 : : }
808 : :
809 [ # # ]: 0 : if (crtc_state->enable)
810 : 0 : drm_mode_get_hv_timing(&crtc_state->mode, &clip.x2, &clip.y2);
811 : :
812 : 0 : plane_state->visible = drm_rect_clip_scaled(src, dst, &clip);
813 : :
814 : 0 : drm_rect_rotate_inv(src, fb->width << 16, fb->height << 16, rotation);
815 : :
816 [ # # ]: 0 : if (!plane_state->visible)
817 : : /*
818 : : * Plane isn't visible; some drivers can handle this
819 : : * so we just return success here. Drivers that can't
820 : : * (including those that use the primary plane helper's
821 : : * update function) will return an error from their
822 : : * update_plane handler.
823 : : */
824 : : return 0;
825 : :
826 [ # # # # ]: 0 : if (!can_position && !drm_rect_equals(dst, &clip)) {
827 : 0 : DRM_DEBUG_KMS("Plane must cover entire CRTC\n");
828 : 0 : drm_rect_debug_print("dst: ", dst, false);
829 : 0 : drm_rect_debug_print("clip: ", &clip, false);
830 : 0 : return -EINVAL;
831 : : }
832 : :
833 : : return 0;
834 : : }
835 : : EXPORT_SYMBOL(drm_atomic_helper_check_plane_state);
836 : :
837 : : /**
838 : : * drm_atomic_helper_check_planes - validate state object for planes changes
839 : : * @dev: DRM device
840 : : * @state: the driver state object
841 : : *
842 : : * Check the state object to see if the requested state is physically possible.
843 : : * This does all the plane update related checks using by calling into the
844 : : * &drm_crtc_helper_funcs.atomic_check and &drm_plane_helper_funcs.atomic_check
845 : : * hooks provided by the driver.
846 : : *
847 : : * It also sets &drm_crtc_state.planes_changed to indicate that a CRTC has
848 : : * updated planes.
849 : : *
850 : : * RETURNS:
851 : : * Zero for success or -errno
852 : : */
853 : : int
854 : 0 : drm_atomic_helper_check_planes(struct drm_device *dev,
855 : : struct drm_atomic_state *state)
856 : : {
857 : 0 : struct drm_crtc *crtc;
858 : 0 : struct drm_crtc_state *new_crtc_state;
859 : 0 : struct drm_plane *plane;
860 : 0 : struct drm_plane_state *new_plane_state, *old_plane_state;
861 : 0 : int i, ret = 0;
862 : :
863 [ # # # # ]: 0 : for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
864 : 0 : const struct drm_plane_helper_funcs *funcs;
865 : :
866 [ # # ]: 0 : WARN_ON(!drm_modeset_is_locked(&plane->mutex));
867 : :
868 : 0 : funcs = plane->helper_private;
869 : :
870 : 0 : drm_atomic_helper_plane_changed(state, old_plane_state, new_plane_state, plane);
871 : :
872 : 0 : drm_atomic_helper_check_plane_damage(state, new_plane_state);
873 : :
874 [ # # # # ]: 0 : if (!funcs || !funcs->atomic_check)
875 : 0 : continue;
876 : :
877 : 0 : ret = funcs->atomic_check(plane, new_plane_state);
878 [ # # ]: 0 : if (ret) {
879 : 0 : DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic driver check failed\n",
880 : : plane->base.id, plane->name);
881 : 0 : return ret;
882 : : }
883 : : }
884 : :
885 [ # # # # ]: 0 : for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) {
886 : 0 : const struct drm_crtc_helper_funcs *funcs;
887 : :
888 : 0 : funcs = crtc->helper_private;
889 : :
890 [ # # # # ]: 0 : if (!funcs || !funcs->atomic_check)
891 : 0 : continue;
892 : :
893 : 0 : ret = funcs->atomic_check(crtc, new_crtc_state);
894 [ # # ]: 0 : if (ret) {
895 : 0 : DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic driver check failed\n",
896 : : crtc->base.id, crtc->name);
897 : 0 : return ret;
898 : : }
899 : : }
900 : :
901 : : return ret;
902 : : }
903 : : EXPORT_SYMBOL(drm_atomic_helper_check_planes);
904 : :
905 : : /**
906 : : * drm_atomic_helper_check - validate state object
907 : : * @dev: DRM device
908 : : * @state: the driver state object
909 : : *
910 : : * Check the state object to see if the requested state is physically possible.
911 : : * Only CRTCs and planes have check callbacks, so for any additional (global)
912 : : * checking that a driver needs it can simply wrap that around this function.
913 : : * Drivers without such needs can directly use this as their
914 : : * &drm_mode_config_funcs.atomic_check callback.
915 : : *
916 : : * This just wraps the two parts of the state checking for planes and modeset
917 : : * state in the default order: First it calls drm_atomic_helper_check_modeset()
918 : : * and then drm_atomic_helper_check_planes(). The assumption is that the
919 : : * @drm_plane_helper_funcs.atomic_check and @drm_crtc_helper_funcs.atomic_check
920 : : * functions depend upon an updated adjusted_mode.clock to e.g. properly compute
921 : : * watermarks.
922 : : *
923 : : * Note that zpos normalization will add all enable planes to the state which
924 : : * might not desired for some drivers.
925 : : * For example enable/disable of a cursor plane which have fixed zpos value
926 : : * would trigger all other enabled planes to be forced to the state change.
927 : : *
928 : : * RETURNS:
929 : : * Zero for success or -errno
930 : : */
931 : 0 : int drm_atomic_helper_check(struct drm_device *dev,
932 : : struct drm_atomic_state *state)
933 : : {
934 : 0 : int ret;
935 : :
936 : 0 : ret = drm_atomic_helper_check_modeset(dev, state);
937 [ # # ]: 0 : if (ret)
938 : : return ret;
939 : :
940 [ # # ]: 0 : if (dev->mode_config.normalize_zpos) {
941 : 0 : ret = drm_atomic_normalize_zpos(dev, state);
942 [ # # ]: 0 : if (ret)
943 : : return ret;
944 : : }
945 : :
946 : 0 : ret = drm_atomic_helper_check_planes(dev, state);
947 [ # # ]: 0 : if (ret)
948 : : return ret;
949 : :
950 [ # # ]: 0 : if (state->legacy_cursor_update)
951 : 0 : state->async_update = !drm_atomic_helper_async_check(dev, state);
952 : :
953 : 0 : drm_self_refresh_helper_alter_state(state);
954 : :
955 : 0 : return ret;
956 : : }
957 : : EXPORT_SYMBOL(drm_atomic_helper_check);
958 : :
959 : : static bool
960 : : crtc_needs_disable(struct drm_crtc_state *old_state,
961 : : struct drm_crtc_state *new_state)
962 : : {
963 : : /*
964 : : * No new_state means the CRTC is off, so the only criteria is whether
965 : : * it's currently active or in self refresh mode.
966 : : */
967 : : if (!new_state)
968 : : return drm_atomic_crtc_effectively_active(old_state);
969 : :
970 : : /*
971 : : * We need to run through the crtc_funcs->disable() function if the CRTC
972 : : * is currently on, if it's transitioning to self refresh mode, or if
973 : : * it's in self refresh mode and needs to be fully disabled.
974 : : */
975 : : return old_state->active ||
976 : : (old_state->self_refresh_active && !new_state->enable) ||
977 : : new_state->self_refresh_active;
978 : : }
979 : :
980 : : static void
981 : : disable_outputs(struct drm_device *dev, struct drm_atomic_state *old_state)
982 : : {
983 : : struct drm_connector *connector;
984 : : struct drm_connector_state *old_conn_state, *new_conn_state;
985 : : struct drm_crtc *crtc;
986 : : struct drm_crtc_state *old_crtc_state, *new_crtc_state;
987 : : int i;
988 : :
989 : : for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) {
990 : : const struct drm_encoder_helper_funcs *funcs;
991 : : struct drm_encoder *encoder;
992 : : struct drm_bridge *bridge;
993 : :
994 : : /* Shut down everything that's in the changeset and currently
995 : : * still on. So need to check the old, saved state. */
996 : : if (!old_conn_state->crtc)
997 : : continue;
998 : :
999 : : old_crtc_state = drm_atomic_get_old_crtc_state(old_state, old_conn_state->crtc);
1000 : :
1001 : : if (new_conn_state->crtc)
1002 : : new_crtc_state = drm_atomic_get_new_crtc_state(
1003 : : old_state,
1004 : : new_conn_state->crtc);
1005 : : else
1006 : : new_crtc_state = NULL;
1007 : :
1008 : : if (!crtc_needs_disable(old_crtc_state, new_crtc_state) ||
1009 : : !drm_atomic_crtc_needs_modeset(old_conn_state->crtc->state))
1010 : : continue;
1011 : :
1012 : : encoder = old_conn_state->best_encoder;
1013 : :
1014 : : /* We shouldn't get this far if we didn't previously have
1015 : : * an encoder.. but WARN_ON() rather than explode.
1016 : : */
1017 : : if (WARN_ON(!encoder))
1018 : : continue;
1019 : :
1020 : : funcs = encoder->helper_private;
1021 : :
1022 : : DRM_DEBUG_ATOMIC("disabling [ENCODER:%d:%s]\n",
1023 : : encoder->base.id, encoder->name);
1024 : :
1025 : : /*
1026 : : * Each encoder has at most one connector (since we always steal
1027 : : * it away), so we won't call disable hooks twice.
1028 : : */
1029 : : bridge = drm_bridge_chain_get_first_bridge(encoder);
1030 : : drm_atomic_bridge_chain_disable(bridge, old_state);
1031 : :
1032 : : /* Right function depends upon target state. */
1033 : : if (funcs) {
1034 : : if (funcs->atomic_disable)
1035 : : funcs->atomic_disable(encoder, old_state);
1036 : : else if (new_conn_state->crtc && funcs->prepare)
1037 : : funcs->prepare(encoder);
1038 : : else if (funcs->disable)
1039 : : funcs->disable(encoder);
1040 : : else if (funcs->dpms)
1041 : : funcs->dpms(encoder, DRM_MODE_DPMS_OFF);
1042 : : }
1043 : :
1044 : : drm_atomic_bridge_chain_post_disable(bridge, old_state);
1045 : : }
1046 : :
1047 : : for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
1048 : : const struct drm_crtc_helper_funcs *funcs;
1049 : : int ret;
1050 : :
1051 : : /* Shut down everything that needs a full modeset. */
1052 : : if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
1053 : : continue;
1054 : :
1055 : : if (!crtc_needs_disable(old_crtc_state, new_crtc_state))
1056 : : continue;
1057 : :
1058 : : funcs = crtc->helper_private;
1059 : :
1060 : : DRM_DEBUG_ATOMIC("disabling [CRTC:%d:%s]\n",
1061 : : crtc->base.id, crtc->name);
1062 : :
1063 : :
1064 : : /* Right function depends upon target state. */
1065 : : if (new_crtc_state->enable && funcs->prepare)
1066 : : funcs->prepare(crtc);
1067 : : else if (funcs->atomic_disable)
1068 : : funcs->atomic_disable(crtc, old_crtc_state);
1069 : : else if (funcs->disable)
1070 : : funcs->disable(crtc);
1071 : : else if (funcs->dpms)
1072 : : funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
1073 : :
1074 : : if (!(dev->irq_enabled && dev->num_crtcs))
1075 : : continue;
1076 : :
1077 : : ret = drm_crtc_vblank_get(crtc);
1078 : : WARN_ONCE(ret != -EINVAL, "driver forgot to call drm_crtc_vblank_off()\n");
1079 : : if (ret == 0)
1080 : : drm_crtc_vblank_put(crtc);
1081 : : }
1082 : : }
1083 : :
1084 : : /**
1085 : : * drm_atomic_helper_update_legacy_modeset_state - update legacy modeset state
1086 : : * @dev: DRM device
1087 : : * @old_state: atomic state object with old state structures
1088 : : *
1089 : : * This function updates all the various legacy modeset state pointers in
1090 : : * connectors, encoders and CRTCs. It also updates the timestamping constants
1091 : : * used for precise vblank timestamps by calling
1092 : : * drm_calc_timestamping_constants().
1093 : : *
1094 : : * Drivers can use this for building their own atomic commit if they don't have
1095 : : * a pure helper-based modeset implementation.
1096 : : *
1097 : : * Since these updates are not synchronized with lockings, only code paths
1098 : : * called from &drm_mode_config_helper_funcs.atomic_commit_tail can look at the
1099 : : * legacy state filled out by this helper. Defacto this means this helper and
1100 : : * the legacy state pointers are only really useful for transitioning an
1101 : : * existing driver to the atomic world.
1102 : : */
1103 : : void
1104 : 0 : drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
1105 : : struct drm_atomic_state *old_state)
1106 : : {
1107 : 0 : struct drm_connector *connector;
1108 : 0 : struct drm_connector_state *old_conn_state, *new_conn_state;
1109 : 0 : struct drm_crtc *crtc;
1110 : 0 : struct drm_crtc_state *new_crtc_state;
1111 : 0 : int i;
1112 : :
1113 : : /* clear out existing links and update dpms */
1114 [ # # # # ]: 0 : for_each_oldnew_connector_in_state(old_state, connector, old_conn_state, new_conn_state, i) {
1115 [ # # ]: 0 : if (connector->encoder) {
1116 [ # # ]: 0 : WARN_ON(!connector->encoder->crtc);
1117 : :
1118 : 0 : connector->encoder->crtc = NULL;
1119 : 0 : connector->encoder = NULL;
1120 : : }
1121 : :
1122 : 0 : crtc = new_conn_state->crtc;
1123 [ # # # # : 0 : if ((!crtc && old_conn_state->crtc) ||
# # ]
1124 [ # # ]: 0 : (crtc && drm_atomic_crtc_needs_modeset(crtc->state))) {
1125 : 0 : int mode = DRM_MODE_DPMS_OFF;
1126 : :
1127 [ # # # # ]: 0 : if (crtc && crtc->state->active)
1128 : 0 : mode = DRM_MODE_DPMS_ON;
1129 : :
1130 : 0 : connector->dpms = mode;
1131 : : }
1132 : : }
1133 : :
1134 : : /* set new links */
1135 [ # # # # ]: 0 : for_each_new_connector_in_state(old_state, connector, new_conn_state, i) {
1136 [ # # ]: 0 : if (!new_conn_state->crtc)
1137 : 0 : continue;
1138 : :
1139 [ # # # # ]: 0 : if (WARN_ON(!new_conn_state->best_encoder))
1140 : 0 : continue;
1141 : :
1142 : 0 : connector->encoder = new_conn_state->best_encoder;
1143 : 0 : connector->encoder->crtc = new_conn_state->crtc;
1144 : : }
1145 : :
1146 : : /* set legacy state in the crtc structure */
1147 [ # # # # ]: 0 : for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
1148 : 0 : struct drm_plane *primary = crtc->primary;
1149 : 0 : struct drm_plane_state *new_plane_state;
1150 : :
1151 : 0 : crtc->mode = new_crtc_state->mode;
1152 : 0 : crtc->enabled = new_crtc_state->enable;
1153 : :
1154 : 0 : new_plane_state =
1155 [ # # ]: 0 : drm_atomic_get_new_plane_state(old_state, primary);
1156 : :
1157 [ # # # # ]: 0 : if (new_plane_state && new_plane_state->crtc == crtc) {
1158 : 0 : crtc->x = new_plane_state->src_x >> 16;
1159 : 0 : crtc->y = new_plane_state->src_y >> 16;
1160 : : }
1161 : :
1162 [ # # ]: 0 : if (new_crtc_state->enable)
1163 : 0 : drm_calc_timestamping_constants(crtc,
1164 : 0 : &new_crtc_state->adjusted_mode);
1165 : : }
1166 : 0 : }
1167 : : EXPORT_SYMBOL(drm_atomic_helper_update_legacy_modeset_state);
1168 : :
1169 : : static void
1170 : : crtc_set_mode(struct drm_device *dev, struct drm_atomic_state *old_state)
1171 : : {
1172 : : struct drm_crtc *crtc;
1173 : : struct drm_crtc_state *new_crtc_state;
1174 : : struct drm_connector *connector;
1175 : : struct drm_connector_state *new_conn_state;
1176 : : int i;
1177 : :
1178 : : for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
1179 : : const struct drm_crtc_helper_funcs *funcs;
1180 : :
1181 : : if (!new_crtc_state->mode_changed)
1182 : : continue;
1183 : :
1184 : : funcs = crtc->helper_private;
1185 : :
1186 : : if (new_crtc_state->enable && funcs->mode_set_nofb) {
1187 : : DRM_DEBUG_ATOMIC("modeset on [CRTC:%d:%s]\n",
1188 : : crtc->base.id, crtc->name);
1189 : :
1190 : : funcs->mode_set_nofb(crtc);
1191 : : }
1192 : : }
1193 : :
1194 : : for_each_new_connector_in_state(old_state, connector, new_conn_state, i) {
1195 : : const struct drm_encoder_helper_funcs *funcs;
1196 : : struct drm_encoder *encoder;
1197 : : struct drm_display_mode *mode, *adjusted_mode;
1198 : : struct drm_bridge *bridge;
1199 : :
1200 : : if (!new_conn_state->best_encoder)
1201 : : continue;
1202 : :
1203 : : encoder = new_conn_state->best_encoder;
1204 : : funcs = encoder->helper_private;
1205 : : new_crtc_state = new_conn_state->crtc->state;
1206 : : mode = &new_crtc_state->mode;
1207 : : adjusted_mode = &new_crtc_state->adjusted_mode;
1208 : :
1209 : : if (!new_crtc_state->mode_changed)
1210 : : continue;
1211 : :
1212 : : DRM_DEBUG_ATOMIC("modeset on [ENCODER:%d:%s]\n",
1213 : : encoder->base.id, encoder->name);
1214 : :
1215 : : /*
1216 : : * Each encoder has at most one connector (since we always steal
1217 : : * it away), so we won't call mode_set hooks twice.
1218 : : */
1219 : : if (funcs && funcs->atomic_mode_set) {
1220 : : funcs->atomic_mode_set(encoder, new_crtc_state,
1221 : : new_conn_state);
1222 : : } else if (funcs && funcs->mode_set) {
1223 : : funcs->mode_set(encoder, mode, adjusted_mode);
1224 : : }
1225 : :
1226 : : bridge = drm_bridge_chain_get_first_bridge(encoder);
1227 : : drm_bridge_chain_mode_set(bridge, mode, adjusted_mode);
1228 : : }
1229 : : }
1230 : :
1231 : : /**
1232 : : * drm_atomic_helper_commit_modeset_disables - modeset commit to disable outputs
1233 : : * @dev: DRM device
1234 : : * @old_state: atomic state object with old state structures
1235 : : *
1236 : : * This function shuts down all the outputs that need to be shut down and
1237 : : * prepares them (if required) with the new mode.
1238 : : *
1239 : : * For compatibility with legacy CRTC helpers this should be called before
1240 : : * drm_atomic_helper_commit_planes(), which is what the default commit function
1241 : : * does. But drivers with different needs can group the modeset commits together
1242 : : * and do the plane commits at the end. This is useful for drivers doing runtime
1243 : : * PM since planes updates then only happen when the CRTC is actually enabled.
1244 : : */
1245 : 0 : void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
1246 : : struct drm_atomic_state *old_state)
1247 : : {
1248 : 0 : disable_outputs(dev, old_state);
1249 : :
1250 : 0 : drm_atomic_helper_update_legacy_modeset_state(dev, old_state);
1251 : :
1252 : 0 : crtc_set_mode(dev, old_state);
1253 : 0 : }
1254 : : EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_disables);
1255 : :
1256 : : static void drm_atomic_helper_commit_writebacks(struct drm_device *dev,
1257 : : struct drm_atomic_state *old_state)
1258 : : {
1259 : : struct drm_connector *connector;
1260 : : struct drm_connector_state *new_conn_state;
1261 : : int i;
1262 : :
1263 : : for_each_new_connector_in_state(old_state, connector, new_conn_state, i) {
1264 : : const struct drm_connector_helper_funcs *funcs;
1265 : :
1266 : : funcs = connector->helper_private;
1267 : : if (!funcs->atomic_commit)
1268 : : continue;
1269 : :
1270 : : if (new_conn_state->writeback_job && new_conn_state->writeback_job->fb) {
1271 : : WARN_ON(connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK);
1272 : : funcs->atomic_commit(connector, new_conn_state);
1273 : : }
1274 : : }
1275 : : }
1276 : :
1277 : : /**
1278 : : * drm_atomic_helper_commit_modeset_enables - modeset commit to enable outputs
1279 : : * @dev: DRM device
1280 : : * @old_state: atomic state object with old state structures
1281 : : *
1282 : : * This function enables all the outputs with the new configuration which had to
1283 : : * be turned off for the update.
1284 : : *
1285 : : * For compatibility with legacy CRTC helpers this should be called after
1286 : : * drm_atomic_helper_commit_planes(), which is what the default commit function
1287 : : * does. But drivers with different needs can group the modeset commits together
1288 : : * and do the plane commits at the end. This is useful for drivers doing runtime
1289 : : * PM since planes updates then only happen when the CRTC is actually enabled.
1290 : : */
1291 : 0 : void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
1292 : : struct drm_atomic_state *old_state)
1293 : : {
1294 : 0 : struct drm_crtc *crtc;
1295 : 0 : struct drm_crtc_state *old_crtc_state;
1296 : 0 : struct drm_crtc_state *new_crtc_state;
1297 : 0 : struct drm_connector *connector;
1298 : 0 : struct drm_connector_state *new_conn_state;
1299 : 0 : int i;
1300 : :
1301 [ # # # # ]: 0 : for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
1302 : 0 : const struct drm_crtc_helper_funcs *funcs;
1303 : :
1304 : : /* Need to filter out CRTCs where only planes change. */
1305 [ # # ]: 0 : if (!drm_atomic_crtc_needs_modeset(new_crtc_state))
1306 : 0 : continue;
1307 : :
1308 [ # # ]: 0 : if (!new_crtc_state->active)
1309 : 0 : continue;
1310 : :
1311 : 0 : funcs = crtc->helper_private;
1312 : :
1313 [ # # ]: 0 : if (new_crtc_state->enable) {
1314 : 0 : DRM_DEBUG_ATOMIC("enabling [CRTC:%d:%s]\n",
1315 : : crtc->base.id, crtc->name);
1316 [ # # ]: 0 : if (funcs->atomic_enable)
1317 : 0 : funcs->atomic_enable(crtc, old_crtc_state);
1318 [ # # ]: 0 : else if (funcs->commit)
1319 : 0 : funcs->commit(crtc);
1320 : : }
1321 : : }
1322 : :
1323 [ # # # # ]: 0 : for_each_new_connector_in_state(old_state, connector, new_conn_state, i) {
1324 : 0 : const struct drm_encoder_helper_funcs *funcs;
1325 : 0 : struct drm_encoder *encoder;
1326 : 0 : struct drm_bridge *bridge;
1327 : :
1328 [ # # ]: 0 : if (!new_conn_state->best_encoder)
1329 : 0 : continue;
1330 : :
1331 [ # # # # ]: 0 : if (!new_conn_state->crtc->state->active ||
1332 : : !drm_atomic_crtc_needs_modeset(new_conn_state->crtc->state))
1333 : 0 : continue;
1334 : :
1335 : 0 : encoder = new_conn_state->best_encoder;
1336 : 0 : funcs = encoder->helper_private;
1337 : :
1338 : 0 : DRM_DEBUG_ATOMIC("enabling [ENCODER:%d:%s]\n",
1339 : : encoder->base.id, encoder->name);
1340 : :
1341 : : /*
1342 : : * Each encoder has at most one connector (since we always steal
1343 : : * it away), so we won't call enable hooks twice.
1344 : : */
1345 [ # # ]: 0 : bridge = drm_bridge_chain_get_first_bridge(encoder);
1346 : 0 : drm_atomic_bridge_chain_pre_enable(bridge, old_state);
1347 : :
1348 [ # # ]: 0 : if (funcs) {
1349 [ # # ]: 0 : if (funcs->atomic_enable)
1350 : 0 : funcs->atomic_enable(encoder, old_state);
1351 [ # # ]: 0 : else if (funcs->enable)
1352 : 0 : funcs->enable(encoder);
1353 [ # # ]: 0 : else if (funcs->commit)
1354 : 0 : funcs->commit(encoder);
1355 : : }
1356 : :
1357 : 0 : drm_atomic_bridge_chain_enable(bridge, old_state);
1358 : : }
1359 : :
1360 : 0 : drm_atomic_helper_commit_writebacks(dev, old_state);
1361 : 0 : }
1362 : : EXPORT_SYMBOL(drm_atomic_helper_commit_modeset_enables);
1363 : :
1364 : : /**
1365 : : * drm_atomic_helper_wait_for_fences - wait for fences stashed in plane state
1366 : : * @dev: DRM device
1367 : : * @state: atomic state object with old state structures
1368 : : * @pre_swap: If true, do an interruptible wait, and @state is the new state.
1369 : : * Otherwise @state is the old state.
1370 : : *
1371 : : * For implicit sync, driver should fish the exclusive fence out from the
1372 : : * incoming fb's and stash it in the drm_plane_state. This is called after
1373 : : * drm_atomic_helper_swap_state() so it uses the current plane state (and
1374 : : * just uses the atomic state to find the changed planes)
1375 : : *
1376 : : * Note that @pre_swap is needed since the point where we block for fences moves
1377 : : * around depending upon whether an atomic commit is blocking or
1378 : : * non-blocking. For non-blocking commit all waiting needs to happen after
1379 : : * drm_atomic_helper_swap_state() is called, but for blocking commits we want
1380 : : * to wait **before** we do anything that can't be easily rolled back. That is
1381 : : * before we call drm_atomic_helper_swap_state().
1382 : : *
1383 : : * Returns zero if success or < 0 if dma_fence_wait() fails.
1384 : : */
1385 : 0 : int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
1386 : : struct drm_atomic_state *state,
1387 : : bool pre_swap)
1388 : : {
1389 : 0 : struct drm_plane *plane;
1390 : 0 : struct drm_plane_state *new_plane_state;
1391 : 0 : int i, ret;
1392 : :
1393 [ # # # # ]: 0 : for_each_new_plane_in_state(state, plane, new_plane_state, i) {
1394 [ # # ]: 0 : if (!new_plane_state->fence)
1395 : 0 : continue;
1396 : :
1397 [ # # ]: 0 : WARN_ON(!new_plane_state->fb);
1398 : :
1399 : : /*
1400 : : * If waiting for fences pre-swap (ie: nonblock), userspace can
1401 : : * still interrupt the operation. Instead of blocking until the
1402 : : * timer expires, make the wait interruptible.
1403 : : */
1404 : 0 : ret = dma_fence_wait(new_plane_state->fence, pre_swap);
1405 [ # # ]: 0 : if (ret)
1406 : 0 : return ret;
1407 : :
1408 : 0 : dma_fence_put(new_plane_state->fence);
1409 : 0 : new_plane_state->fence = NULL;
1410 : : }
1411 : :
1412 : : return 0;
1413 : : }
1414 : : EXPORT_SYMBOL(drm_atomic_helper_wait_for_fences);
1415 : :
1416 : : /**
1417 : : * drm_atomic_helper_wait_for_vblanks - wait for vblank on CRTCs
1418 : : * @dev: DRM device
1419 : : * @old_state: atomic state object with old state structures
1420 : : *
1421 : : * Helper to, after atomic commit, wait for vblanks on all affected
1422 : : * CRTCs (ie. before cleaning up old framebuffers using
1423 : : * drm_atomic_helper_cleanup_planes()). It will only wait on CRTCs where the
1424 : : * framebuffers have actually changed to optimize for the legacy cursor and
1425 : : * plane update use-case.
1426 : : *
1427 : : * Drivers using the nonblocking commit tracking support initialized by calling
1428 : : * drm_atomic_helper_setup_commit() should look at
1429 : : * drm_atomic_helper_wait_for_flip_done() as an alternative.
1430 : : */
1431 : : void
1432 : 0 : drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
1433 : : struct drm_atomic_state *old_state)
1434 : : {
1435 : 0 : struct drm_crtc *crtc;
1436 : 0 : struct drm_crtc_state *old_crtc_state, *new_crtc_state;
1437 : 0 : int i, ret;
1438 : 0 : unsigned crtc_mask = 0;
1439 : :
1440 : : /*
1441 : : * Legacy cursor ioctls are completely unsynced, and userspace
1442 : : * relies on that (by doing tons of cursor updates).
1443 : : */
1444 [ # # ]: 0 : if (old_state->legacy_cursor_update)
1445 : : return;
1446 : :
1447 [ # # # # ]: 0 : for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
1448 [ # # ]: 0 : if (!new_crtc_state->active)
1449 : 0 : continue;
1450 : :
1451 : 0 : ret = drm_crtc_vblank_get(crtc);
1452 [ # # ]: 0 : if (ret != 0)
1453 : 0 : continue;
1454 : :
1455 : 0 : crtc_mask |= drm_crtc_mask(crtc);
1456 : 0 : old_state->crtcs[i].last_vblank_count = drm_crtc_vblank_count(crtc);
1457 : : }
1458 : :
1459 [ # # # # ]: 0 : for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) {
1460 [ # # ]: 0 : if (!(crtc_mask & drm_crtc_mask(crtc)))
1461 : 0 : continue;
1462 : :
1463 [ # # # # : 0 : ret = wait_event_timeout(dev->vblank[i].queue,
# # ]
1464 : : old_state->crtcs[i].last_vblank_count !=
1465 : : drm_crtc_vblank_count(crtc),
1466 : : msecs_to_jiffies(100));
1467 : :
1468 [ # # ]: 0 : WARN(!ret, "[CRTC:%d:%s] vblank wait timed out\n",
1469 : : crtc->base.id, crtc->name);
1470 : :
1471 : 0 : drm_crtc_vblank_put(crtc);
1472 : : }
1473 : : }
1474 : : EXPORT_SYMBOL(drm_atomic_helper_wait_for_vblanks);
1475 : :
1476 : : /**
1477 : : * drm_atomic_helper_wait_for_flip_done - wait for all page flips to be done
1478 : : * @dev: DRM device
1479 : : * @old_state: atomic state object with old state structures
1480 : : *
1481 : : * Helper to, after atomic commit, wait for page flips on all affected
1482 : : * crtcs (ie. before cleaning up old framebuffers using
1483 : : * drm_atomic_helper_cleanup_planes()). Compared to
1484 : : * drm_atomic_helper_wait_for_vblanks() this waits for the completion on all
1485 : : * CRTCs, assuming that cursors-only updates are signalling their completion
1486 : : * immediately (or using a different path).
1487 : : *
1488 : : * This requires that drivers use the nonblocking commit tracking support
1489 : : * initialized using drm_atomic_helper_setup_commit().
1490 : : */
1491 : 0 : void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev,
1492 : : struct drm_atomic_state *old_state)
1493 : : {
1494 : 0 : struct drm_crtc *crtc;
1495 : 0 : int i;
1496 : :
1497 [ # # ]: 0 : for (i = 0; i < dev->mode_config.num_crtc; i++) {
1498 : 0 : struct drm_crtc_commit *commit = old_state->crtcs[i].commit;
1499 : 0 : int ret;
1500 : :
1501 : 0 : crtc = old_state->crtcs[i].ptr;
1502 : :
1503 [ # # ]: 0 : if (!crtc || !commit)
1504 : 0 : continue;
1505 : :
1506 : 0 : ret = wait_for_completion_timeout(&commit->flip_done, 10 * HZ);
1507 [ # # ]: 0 : if (ret == 0)
1508 : 0 : DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n",
1509 : : crtc->base.id, crtc->name);
1510 : : }
1511 : :
1512 [ # # ]: 0 : if (old_state->fake_commit)
1513 : 0 : complete_all(&old_state->fake_commit->flip_done);
1514 : 0 : }
1515 : : EXPORT_SYMBOL(drm_atomic_helper_wait_for_flip_done);
1516 : :
1517 : : /**
1518 : : * drm_atomic_helper_commit_tail - commit atomic update to hardware
1519 : : * @old_state: atomic state object with old state structures
1520 : : *
1521 : : * This is the default implementation for the
1522 : : * &drm_mode_config_helper_funcs.atomic_commit_tail hook, for drivers
1523 : : * that do not support runtime_pm or do not need the CRTC to be
1524 : : * enabled to perform a commit. Otherwise, see
1525 : : * drm_atomic_helper_commit_tail_rpm().
1526 : : *
1527 : : * Note that the default ordering of how the various stages are called is to
1528 : : * match the legacy modeset helper library closest.
1529 : : */
1530 : 0 : void drm_atomic_helper_commit_tail(struct drm_atomic_state *old_state)
1531 : : {
1532 : 0 : struct drm_device *dev = old_state->dev;
1533 : :
1534 : 0 : drm_atomic_helper_commit_modeset_disables(dev, old_state);
1535 : :
1536 : 0 : drm_atomic_helper_commit_planes(dev, old_state, 0);
1537 : :
1538 : 0 : drm_atomic_helper_commit_modeset_enables(dev, old_state);
1539 : :
1540 : 0 : drm_atomic_helper_fake_vblank(old_state);
1541 : :
1542 : 0 : drm_atomic_helper_commit_hw_done(old_state);
1543 : :
1544 : 0 : drm_atomic_helper_wait_for_vblanks(dev, old_state);
1545 : :
1546 : 0 : drm_atomic_helper_cleanup_planes(dev, old_state);
1547 : 0 : }
1548 : : EXPORT_SYMBOL(drm_atomic_helper_commit_tail);
1549 : :
1550 : : /**
1551 : : * drm_atomic_helper_commit_tail_rpm - commit atomic update to hardware
1552 : : * @old_state: new modeset state to be committed
1553 : : *
1554 : : * This is an alternative implementation for the
1555 : : * &drm_mode_config_helper_funcs.atomic_commit_tail hook, for drivers
1556 : : * that support runtime_pm or need the CRTC to be enabled to perform a
1557 : : * commit. Otherwise, one should use the default implementation
1558 : : * drm_atomic_helper_commit_tail().
1559 : : */
1560 : 0 : void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_state *old_state)
1561 : : {
1562 : 0 : struct drm_device *dev = old_state->dev;
1563 : :
1564 : 0 : drm_atomic_helper_commit_modeset_disables(dev, old_state);
1565 : :
1566 : 0 : drm_atomic_helper_commit_modeset_enables(dev, old_state);
1567 : :
1568 : 0 : drm_atomic_helper_commit_planes(dev, old_state,
1569 : : DRM_PLANE_COMMIT_ACTIVE_ONLY);
1570 : :
1571 : 0 : drm_atomic_helper_fake_vblank(old_state);
1572 : :
1573 : 0 : drm_atomic_helper_commit_hw_done(old_state);
1574 : :
1575 : 0 : drm_atomic_helper_wait_for_vblanks(dev, old_state);
1576 : :
1577 : 0 : drm_atomic_helper_cleanup_planes(dev, old_state);
1578 : 0 : }
1579 : : EXPORT_SYMBOL(drm_atomic_helper_commit_tail_rpm);
1580 : :
1581 : 0 : static void commit_tail(struct drm_atomic_state *old_state)
1582 : : {
1583 : 0 : struct drm_device *dev = old_state->dev;
1584 : 0 : const struct drm_mode_config_helper_funcs *funcs;
1585 : 0 : struct drm_crtc_state *new_crtc_state;
1586 : 0 : struct drm_crtc *crtc;
1587 : 0 : ktime_t start;
1588 : 0 : s64 commit_time_ms;
1589 : 0 : unsigned int i, new_self_refresh_mask = 0;
1590 : :
1591 : 0 : funcs = dev->mode_config.helper_private;
1592 : :
1593 : : /*
1594 : : * We're measuring the _entire_ commit, so the time will vary depending
1595 : : * on how many fences and objects are involved. For the purposes of self
1596 : : * refresh, this is desirable since it'll give us an idea of how
1597 : : * congested things are. This will inform our decision on how often we
1598 : : * should enter self refresh after idle.
1599 : : *
1600 : : * These times will be averaged out in the self refresh helpers to avoid
1601 : : * overreacting over one outlier frame
1602 : : */
1603 : 0 : start = ktime_get();
1604 : :
1605 : 0 : drm_atomic_helper_wait_for_fences(dev, old_state, false);
1606 : :
1607 : 0 : drm_atomic_helper_wait_for_dependencies(old_state);
1608 : :
1609 : : /*
1610 : : * We cannot safely access new_crtc_state after
1611 : : * drm_atomic_helper_commit_hw_done() so figure out which crtc's have
1612 : : * self-refresh active beforehand:
1613 : : */
1614 [ # # # # ]: 0 : for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i)
1615 [ # # ]: 0 : if (new_crtc_state->self_refresh_active)
1616 : 0 : new_self_refresh_mask |= BIT(i);
1617 : :
1618 [ # # # # ]: 0 : if (funcs && funcs->atomic_commit_tail)
1619 : 0 : funcs->atomic_commit_tail(old_state);
1620 : : else
1621 : 0 : drm_atomic_helper_commit_tail(old_state);
1622 : :
1623 : 0 : commit_time_ms = ktime_ms_delta(ktime_get(), start);
1624 [ # # ]: 0 : if (commit_time_ms > 0)
1625 : 0 : drm_self_refresh_helper_update_avg_times(old_state,
1626 : : (unsigned long)commit_time_ms,
1627 : : new_self_refresh_mask);
1628 : :
1629 : 0 : drm_atomic_helper_commit_cleanup_done(old_state);
1630 : :
1631 : 0 : drm_atomic_state_put(old_state);
1632 : 0 : }
1633 : :
1634 : 0 : static void commit_work(struct work_struct *work)
1635 : : {
1636 : 0 : struct drm_atomic_state *state = container_of(work,
1637 : : struct drm_atomic_state,
1638 : : commit_work);
1639 : 0 : commit_tail(state);
1640 : 0 : }
1641 : :
1642 : : /**
1643 : : * drm_atomic_helper_async_check - check if state can be commited asynchronously
1644 : : * @dev: DRM device
1645 : : * @state: the driver state object
1646 : : *
1647 : : * This helper will check if it is possible to commit the state asynchronously.
1648 : : * Async commits are not supposed to swap the states like normal sync commits
1649 : : * but just do in-place changes on the current state.
1650 : : *
1651 : : * It will return 0 if the commit can happen in an asynchronous fashion or error
1652 : : * if not. Note that error just mean it can't be commited asynchronously, if it
1653 : : * fails the commit should be treated like a normal synchronous commit.
1654 : : */
1655 : 0 : int drm_atomic_helper_async_check(struct drm_device *dev,
1656 : : struct drm_atomic_state *state)
1657 : : {
1658 : 0 : struct drm_crtc *crtc;
1659 : 0 : struct drm_crtc_state *crtc_state;
1660 : 0 : struct drm_plane *plane = NULL;
1661 : 0 : struct drm_plane_state *old_plane_state = NULL;
1662 : 0 : struct drm_plane_state *new_plane_state = NULL;
1663 : 0 : const struct drm_plane_helper_funcs *funcs;
1664 : 0 : int i, n_planes = 0;
1665 : :
1666 [ # # # # ]: 0 : for_each_new_crtc_in_state(state, crtc, crtc_state, i) {
1667 [ # # ]: 0 : if (drm_atomic_crtc_needs_modeset(crtc_state))
1668 : : return -EINVAL;
1669 : : }
1670 : :
1671 [ # # # # ]: 0 : for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i)
1672 : 0 : n_planes++;
1673 : :
1674 : : /* FIXME: we support only single plane updates for now */
1675 [ # # ]: 0 : if (n_planes != 1)
1676 : : return -EINVAL;
1677 : :
1678 [ # # ]: 0 : if (!new_plane_state->crtc ||
1679 [ # # ]: 0 : old_plane_state->crtc != new_plane_state->crtc)
1680 : : return -EINVAL;
1681 : :
1682 : 0 : funcs = plane->helper_private;
1683 [ # # ]: 0 : if (!funcs->atomic_async_update)
1684 : : return -EINVAL;
1685 : :
1686 [ # # ]: 0 : if (new_plane_state->fence)
1687 : : return -EINVAL;
1688 : :
1689 : : /*
1690 : : * Don't do an async update if there is an outstanding commit modifying
1691 : : * the plane. This prevents our async update's changes from getting
1692 : : * overridden by a previous synchronous update's state.
1693 : : */
1694 [ # # # # ]: 0 : if (old_plane_state->commit &&
1695 : 0 : !try_wait_for_completion(&old_plane_state->commit->hw_done))
1696 : : return -EBUSY;
1697 : :
1698 : 0 : return funcs->atomic_async_check(plane, new_plane_state);
1699 : : }
1700 : : EXPORT_SYMBOL(drm_atomic_helper_async_check);
1701 : :
1702 : : /**
1703 : : * drm_atomic_helper_async_commit - commit state asynchronously
1704 : : * @dev: DRM device
1705 : : * @state: the driver state object
1706 : : *
1707 : : * This function commits a state asynchronously, i.e., not vblank
1708 : : * synchronized. It should be used on a state only when
1709 : : * drm_atomic_async_check() succeeds. Async commits are not supposed to swap
1710 : : * the states like normal sync commits, but just do in-place changes on the
1711 : : * current state.
1712 : : *
1713 : : * TODO: Implement full swap instead of doing in-place changes.
1714 : : */
1715 : 0 : void drm_atomic_helper_async_commit(struct drm_device *dev,
1716 : : struct drm_atomic_state *state)
1717 : : {
1718 : 0 : struct drm_plane *plane;
1719 : 0 : struct drm_plane_state *plane_state;
1720 : 0 : const struct drm_plane_helper_funcs *funcs;
1721 : 0 : int i;
1722 : :
1723 [ # # # # ]: 0 : for_each_new_plane_in_state(state, plane, plane_state, i) {
1724 : 0 : struct drm_framebuffer *new_fb = plane_state->fb;
1725 : 0 : struct drm_framebuffer *old_fb = plane->state->fb;
1726 : :
1727 : 0 : funcs = plane->helper_private;
1728 : 0 : funcs->atomic_async_update(plane, plane_state);
1729 : :
1730 : : /*
1731 : : * ->atomic_async_update() is supposed to update the
1732 : : * plane->state in-place, make sure at least common
1733 : : * properties have been properly updated.
1734 : : */
1735 [ # # ]: 0 : WARN_ON_ONCE(plane->state->fb != new_fb);
1736 [ # # ]: 0 : WARN_ON_ONCE(plane->state->crtc_x != plane_state->crtc_x);
1737 [ # # ]: 0 : WARN_ON_ONCE(plane->state->crtc_y != plane_state->crtc_y);
1738 [ # # ]: 0 : WARN_ON_ONCE(plane->state->src_x != plane_state->src_x);
1739 [ # # ]: 0 : WARN_ON_ONCE(plane->state->src_y != plane_state->src_y);
1740 : :
1741 : : /*
1742 : : * Make sure the FBs have been swapped so that cleanups in the
1743 : : * new_state performs a cleanup in the old FB.
1744 : : */
1745 [ # # ]: 0 : WARN_ON_ONCE(plane_state->fb != old_fb);
1746 : : }
1747 : 0 : }
1748 : : EXPORT_SYMBOL(drm_atomic_helper_async_commit);
1749 : :
1750 : : /**
1751 : : * drm_atomic_helper_commit - commit validated state object
1752 : : * @dev: DRM device
1753 : : * @state: the driver state object
1754 : : * @nonblock: whether nonblocking behavior is requested.
1755 : : *
1756 : : * This function commits a with drm_atomic_helper_check() pre-validated state
1757 : : * object. This can still fail when e.g. the framebuffer reservation fails. This
1758 : : * function implements nonblocking commits, using
1759 : : * drm_atomic_helper_setup_commit() and related functions.
1760 : : *
1761 : : * Committing the actual hardware state is done through the
1762 : : * &drm_mode_config_helper_funcs.atomic_commit_tail callback, or its default
1763 : : * implementation drm_atomic_helper_commit_tail().
1764 : : *
1765 : : * RETURNS:
1766 : : * Zero for success or -errno.
1767 : : */
1768 : 0 : int drm_atomic_helper_commit(struct drm_device *dev,
1769 : : struct drm_atomic_state *state,
1770 : : bool nonblock)
1771 : : {
1772 : 0 : int ret;
1773 : :
1774 [ # # ]: 0 : if (state->async_update) {
1775 : 0 : ret = drm_atomic_helper_prepare_planes(dev, state);
1776 [ # # ]: 0 : if (ret)
1777 : : return ret;
1778 : :
1779 : 0 : drm_atomic_helper_async_commit(dev, state);
1780 : 0 : drm_atomic_helper_cleanup_planes(dev, state);
1781 : :
1782 : 0 : return 0;
1783 : : }
1784 : :
1785 : 0 : ret = drm_atomic_helper_setup_commit(state, nonblock);
1786 [ # # ]: 0 : if (ret)
1787 : : return ret;
1788 : :
1789 : 0 : INIT_WORK(&state->commit_work, commit_work);
1790 : :
1791 : 0 : ret = drm_atomic_helper_prepare_planes(dev, state);
1792 [ # # ]: 0 : if (ret)
1793 : : return ret;
1794 : :
1795 [ # # ]: 0 : if (!nonblock) {
1796 : 0 : ret = drm_atomic_helper_wait_for_fences(dev, state, true);
1797 [ # # ]: 0 : if (ret)
1798 : 0 : goto err;
1799 : : }
1800 : :
1801 : : /*
1802 : : * This is the point of no return - everything below never fails except
1803 : : * when the hw goes bonghits. Which means we can commit the new state on
1804 : : * the software side now.
1805 : : */
1806 : :
1807 : 0 : ret = drm_atomic_helper_swap_state(state, true);
1808 [ # # ]: 0 : if (ret)
1809 : 0 : goto err;
1810 : :
1811 : : /*
1812 : : * Everything below can be run asynchronously without the need to grab
1813 : : * any modeset locks at all under one condition: It must be guaranteed
1814 : : * that the asynchronous work has either been cancelled (if the driver
1815 : : * supports it, which at least requires that the framebuffers get
1816 : : * cleaned up with drm_atomic_helper_cleanup_planes()) or completed
1817 : : * before the new state gets committed on the software side with
1818 : : * drm_atomic_helper_swap_state().
1819 : : *
1820 : : * This scheme allows new atomic state updates to be prepared and
1821 : : * checked in parallel to the asynchronous completion of the previous
1822 : : * update. Which is important since compositors need to figure out the
1823 : : * composition of the next frame right after having submitted the
1824 : : * current layout.
1825 : : *
1826 : : * NOTE: Commit work has multiple phases, first hardware commit, then
1827 : : * cleanup. We want them to overlap, hence need system_unbound_wq to
1828 : : * make sure work items don't artificially stall on each another.
1829 : : */
1830 : :
1831 : 0 : drm_atomic_state_get(state);
1832 [ # # ]: 0 : if (nonblock)
1833 : 0 : queue_work(system_unbound_wq, &state->commit_work);
1834 : : else
1835 : 0 : commit_tail(state);
1836 : :
1837 : : return 0;
1838 : :
1839 : 0 : err:
1840 : 0 : drm_atomic_helper_cleanup_planes(dev, state);
1841 : 0 : return ret;
1842 : : }
1843 : : EXPORT_SYMBOL(drm_atomic_helper_commit);
1844 : :
1845 : : /**
1846 : : * DOC: implementing nonblocking commit
1847 : : *
1848 : : * Nonblocking atomic commits should use struct &drm_crtc_commit to sequence
1849 : : * different operations against each another. Locks, especially struct
1850 : : * &drm_modeset_lock, should not be held in worker threads or any other
1851 : : * asynchronous context used to commit the hardware state.
1852 : : *
1853 : : * drm_atomic_helper_commit() implements the recommended sequence for
1854 : : * nonblocking commits, using drm_atomic_helper_setup_commit() internally:
1855 : : *
1856 : : * 1. Run drm_atomic_helper_prepare_planes(). Since this can fail and we
1857 : : * need to propagate out of memory/VRAM errors to userspace, it must be called
1858 : : * synchronously.
1859 : : *
1860 : : * 2. Synchronize with any outstanding nonblocking commit worker threads which
1861 : : * might be affected by the new state update. This is handled by
1862 : : * drm_atomic_helper_setup_commit().
1863 : : *
1864 : : * Asynchronous workers need to have sufficient parallelism to be able to run
1865 : : * different atomic commits on different CRTCs in parallel. The simplest way to
1866 : : * achieve this is by running them on the &system_unbound_wq work queue. Note
1867 : : * that drivers are not required to split up atomic commits and run an
1868 : : * individual commit in parallel - userspace is supposed to do that if it cares.
1869 : : * But it might be beneficial to do that for modesets, since those necessarily
1870 : : * must be done as one global operation, and enabling or disabling a CRTC can
1871 : : * take a long time. But even that is not required.
1872 : : *
1873 : : * IMPORTANT: A &drm_atomic_state update for multiple CRTCs is sequenced
1874 : : * against all CRTCs therein. Therefore for atomic state updates which only flip
1875 : : * planes the driver must not get the struct &drm_crtc_state of unrelated CRTCs
1876 : : * in its atomic check code: This would prevent committing of atomic updates to
1877 : : * multiple CRTCs in parallel. In general, adding additional state structures
1878 : : * should be avoided as much as possible, because this reduces parallelism in
1879 : : * (nonblocking) commits, both due to locking and due to commit sequencing
1880 : : * requirements.
1881 : : *
1882 : : * 3. The software state is updated synchronously with
1883 : : * drm_atomic_helper_swap_state(). Doing this under the protection of all modeset
1884 : : * locks means concurrent callers never see inconsistent state. Note that commit
1885 : : * workers do not hold any locks; their access is only coordinated through
1886 : : * ordering. If workers would access state only through the pointers in the
1887 : : * free-standing state objects (currently not the case for any driver) then even
1888 : : * multiple pending commits could be in-flight at the same time.
1889 : : *
1890 : : * 4. Schedule a work item to do all subsequent steps, using the split-out
1891 : : * commit helpers: a) pre-plane commit b) plane commit c) post-plane commit and
1892 : : * then cleaning up the framebuffers after the old framebuffer is no longer
1893 : : * being displayed. The scheduled work should synchronize against other workers
1894 : : * using the &drm_crtc_commit infrastructure as needed. See
1895 : : * drm_atomic_helper_setup_commit() for more details.
1896 : : */
1897 : :
1898 : 0 : static int stall_checks(struct drm_crtc *crtc, bool nonblock)
1899 : : {
1900 : 0 : struct drm_crtc_commit *commit, *stall_commit = NULL;
1901 : 0 : bool completed = true;
1902 : 0 : int i;
1903 : 0 : long ret = 0;
1904 : :
1905 : 0 : spin_lock(&crtc->commit_lock);
1906 : 0 : i = 0;
1907 [ # # ]: 0 : list_for_each_entry(commit, &crtc->commit_list, commit_entry) {
1908 [ # # ]: 0 : if (i == 0) {
1909 : 0 : completed = try_wait_for_completion(&commit->flip_done);
1910 : : /* Userspace is not allowed to get ahead of the previous
1911 : : * commit with nonblocking ones. */
1912 [ # # ]: 0 : if (!completed && nonblock) {
1913 : 0 : spin_unlock(&crtc->commit_lock);
1914 : 0 : return -EBUSY;
1915 : : }
1916 [ # # ]: 0 : } else if (i == 1) {
1917 : 0 : stall_commit = drm_crtc_commit_get(commit);
1918 : 0 : break;
1919 : : }
1920 : :
1921 : 0 : i++;
1922 : : }
1923 : 0 : spin_unlock(&crtc->commit_lock);
1924 : :
1925 [ # # ]: 0 : if (!stall_commit)
1926 : : return 0;
1927 : :
1928 : : /* We don't want to let commits get ahead of cleanup work too much,
1929 : : * stalling on 2nd previous commit means triple-buffer won't ever stall.
1930 : : */
1931 : 0 : ret = wait_for_completion_interruptible_timeout(&stall_commit->cleanup_done,
1932 : : 10*HZ);
1933 [ # # ]: 0 : if (ret == 0)
1934 : 0 : DRM_ERROR("[CRTC:%d:%s] cleanup_done timed out\n",
1935 : : crtc->base.id, crtc->name);
1936 : :
1937 : 0 : drm_crtc_commit_put(stall_commit);
1938 : :
1939 : 0 : return ret < 0 ? ret : 0;
1940 : : }
1941 : :
1942 : 0 : static void release_crtc_commit(struct completion *completion)
1943 : : {
1944 : 0 : struct drm_crtc_commit *commit = container_of(completion,
1945 : : typeof(*commit),
1946 : : flip_done);
1947 : :
1948 : 0 : drm_crtc_commit_put(commit);
1949 : 0 : }
1950 : :
1951 : 0 : static void init_commit(struct drm_crtc_commit *commit, struct drm_crtc *crtc)
1952 : : {
1953 : 0 : init_completion(&commit->flip_done);
1954 : 0 : init_completion(&commit->hw_done);
1955 : 0 : init_completion(&commit->cleanup_done);
1956 : 0 : INIT_LIST_HEAD(&commit->commit_entry);
1957 : 0 : kref_init(&commit->ref);
1958 : 0 : commit->crtc = crtc;
1959 : 0 : }
1960 : :
1961 : : static struct drm_crtc_commit *
1962 : 0 : crtc_or_fake_commit(struct drm_atomic_state *state, struct drm_crtc *crtc)
1963 : : {
1964 [ # # ]: 0 : if (crtc) {
1965 : 0 : struct drm_crtc_state *new_crtc_state;
1966 : :
1967 : 0 : new_crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
1968 : :
1969 : 0 : return new_crtc_state->commit;
1970 : : }
1971 : :
1972 [ # # ]: 0 : if (!state->fake_commit) {
1973 : 0 : state->fake_commit = kzalloc(sizeof(*state->fake_commit), GFP_KERNEL);
1974 [ # # ]: 0 : if (!state->fake_commit)
1975 : : return NULL;
1976 : :
1977 : 0 : init_commit(state->fake_commit, NULL);
1978 : : }
1979 : :
1980 : 0 : return state->fake_commit;
1981 : : }
1982 : :
1983 : : /**
1984 : : * drm_atomic_helper_setup_commit - setup possibly nonblocking commit
1985 : : * @state: new modeset state to be committed
1986 : : * @nonblock: whether nonblocking behavior is requested.
1987 : : *
1988 : : * This function prepares @state to be used by the atomic helper's support for
1989 : : * nonblocking commits. Drivers using the nonblocking commit infrastructure
1990 : : * should always call this function from their
1991 : : * &drm_mode_config_funcs.atomic_commit hook.
1992 : : *
1993 : : * To be able to use this support drivers need to use a few more helper
1994 : : * functions. drm_atomic_helper_wait_for_dependencies() must be called before
1995 : : * actually committing the hardware state, and for nonblocking commits this call
1996 : : * must be placed in the async worker. See also drm_atomic_helper_swap_state()
1997 : : * and its stall parameter, for when a driver's commit hooks look at the
1998 : : * &drm_crtc.state, &drm_plane.state or &drm_connector.state pointer directly.
1999 : : *
2000 : : * Completion of the hardware commit step must be signalled using
2001 : : * drm_atomic_helper_commit_hw_done(). After this step the driver is not allowed
2002 : : * to read or change any permanent software or hardware modeset state. The only
2003 : : * exception is state protected by other means than &drm_modeset_lock locks.
2004 : : * Only the free standing @state with pointers to the old state structures can
2005 : : * be inspected, e.g. to clean up old buffers using
2006 : : * drm_atomic_helper_cleanup_planes().
2007 : : *
2008 : : * At the very end, before cleaning up @state drivers must call
2009 : : * drm_atomic_helper_commit_cleanup_done().
2010 : : *
2011 : : * This is all implemented by in drm_atomic_helper_commit(), giving drivers a
2012 : : * complete and easy-to-use default implementation of the atomic_commit() hook.
2013 : : *
2014 : : * The tracking of asynchronously executed and still pending commits is done
2015 : : * using the core structure &drm_crtc_commit.
2016 : : *
2017 : : * By default there's no need to clean up resources allocated by this function
2018 : : * explicitly: drm_atomic_state_default_clear() will take care of that
2019 : : * automatically.
2020 : : *
2021 : : * Returns:
2022 : : *
2023 : : * 0 on success. -EBUSY when userspace schedules nonblocking commits too fast,
2024 : : * -ENOMEM on allocation failures and -EINTR when a signal is pending.
2025 : : */
2026 : 0 : int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
2027 : : bool nonblock)
2028 : : {
2029 : 0 : struct drm_crtc *crtc;
2030 : 0 : struct drm_crtc_state *old_crtc_state, *new_crtc_state;
2031 : 0 : struct drm_connector *conn;
2032 : 0 : struct drm_connector_state *old_conn_state, *new_conn_state;
2033 : 0 : struct drm_plane *plane;
2034 : 0 : struct drm_plane_state *old_plane_state, *new_plane_state;
2035 : 0 : struct drm_crtc_commit *commit;
2036 : 0 : int i, ret;
2037 : :
2038 [ # # # # ]: 0 : for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
2039 : 0 : commit = kzalloc(sizeof(*commit), GFP_KERNEL);
2040 [ # # ]: 0 : if (!commit)
2041 : : return -ENOMEM;
2042 : :
2043 : 0 : init_commit(commit, crtc);
2044 : :
2045 : 0 : new_crtc_state->commit = commit;
2046 : :
2047 : 0 : ret = stall_checks(crtc, nonblock);
2048 [ # # ]: 0 : if (ret)
2049 : 0 : return ret;
2050 : :
2051 : : /* Drivers only send out events when at least either current or
2052 : : * new CRTC state is active. Complete right away if everything
2053 : : * stays off. */
2054 [ # # # # ]: 0 : if (!old_crtc_state->active && !new_crtc_state->active) {
2055 : 0 : complete_all(&commit->flip_done);
2056 : 0 : continue;
2057 : : }
2058 : :
2059 : : /* Legacy cursor updates are fully unsynced. */
2060 [ # # ]: 0 : if (state->legacy_cursor_update) {
2061 : 0 : complete_all(&commit->flip_done);
2062 : 0 : continue;
2063 : : }
2064 : :
2065 [ # # ]: 0 : if (!new_crtc_state->event) {
2066 : 0 : commit->event = kzalloc(sizeof(*commit->event),
2067 : : GFP_KERNEL);
2068 [ # # ]: 0 : if (!commit->event)
2069 : : return -ENOMEM;
2070 : :
2071 : 0 : new_crtc_state->event = commit->event;
2072 : : }
2073 : :
2074 : 0 : new_crtc_state->event->base.completion = &commit->flip_done;
2075 : 0 : new_crtc_state->event->base.completion_release = release_crtc_commit;
2076 : 0 : drm_crtc_commit_get(commit);
2077 : :
2078 : 0 : commit->abort_completion = true;
2079 : :
2080 : 0 : state->crtcs[i].commit = commit;
2081 : 0 : drm_crtc_commit_get(commit);
2082 : : }
2083 : :
2084 [ # # # # ]: 0 : for_each_oldnew_connector_in_state(state, conn, old_conn_state, new_conn_state, i) {
2085 : : /* Userspace is not allowed to get ahead of the previous
2086 : : * commit with nonblocking ones. */
2087 [ # # # # : 0 : if (nonblock && old_conn_state->commit &&
# # ]
2088 : 0 : !try_wait_for_completion(&old_conn_state->commit->flip_done))
2089 : : return -EBUSY;
2090 : :
2091 : : /* Always track connectors explicitly for e.g. link retraining. */
2092 [ # # ]: 0 : commit = crtc_or_fake_commit(state, new_conn_state->crtc ?: old_conn_state->crtc);
2093 [ # # ]: 0 : if (!commit)
2094 : : return -ENOMEM;
2095 : :
2096 : 0 : new_conn_state->commit = drm_crtc_commit_get(commit);
2097 : : }
2098 : :
2099 [ # # # # ]: 0 : for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
2100 : : /* Userspace is not allowed to get ahead of the previous
2101 : : * commit with nonblocking ones. */
2102 [ # # # # : 0 : if (nonblock && old_plane_state->commit &&
# # ]
2103 : 0 : !try_wait_for_completion(&old_plane_state->commit->flip_done))
2104 : : return -EBUSY;
2105 : :
2106 : : /* Always track planes explicitly for async pageflip support. */
2107 [ # # ]: 0 : commit = crtc_or_fake_commit(state, new_plane_state->crtc ?: old_plane_state->crtc);
2108 [ # # ]: 0 : if (!commit)
2109 : : return -ENOMEM;
2110 : :
2111 : 0 : new_plane_state->commit = drm_crtc_commit_get(commit);
2112 : : }
2113 : :
2114 : : return 0;
2115 : : }
2116 : : EXPORT_SYMBOL(drm_atomic_helper_setup_commit);
2117 : :
2118 : : /**
2119 : : * drm_atomic_helper_wait_for_dependencies - wait for required preceeding commits
2120 : : * @old_state: atomic state object with old state structures
2121 : : *
2122 : : * This function waits for all preceeding commits that touch the same CRTC as
2123 : : * @old_state to both be committed to the hardware (as signalled by
2124 : : * drm_atomic_helper_commit_hw_done()) and executed by the hardware (as signalled
2125 : : * by calling drm_crtc_send_vblank_event() on the &drm_crtc_state.event).
2126 : : *
2127 : : * This is part of the atomic helper support for nonblocking commits, see
2128 : : * drm_atomic_helper_setup_commit() for an overview.
2129 : : */
2130 : 0 : void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *old_state)
2131 : : {
2132 : 0 : struct drm_crtc *crtc;
2133 : 0 : struct drm_crtc_state *old_crtc_state;
2134 : 0 : struct drm_plane *plane;
2135 : 0 : struct drm_plane_state *old_plane_state;
2136 : 0 : struct drm_connector *conn;
2137 : 0 : struct drm_connector_state *old_conn_state;
2138 : 0 : struct drm_crtc_commit *commit;
2139 : 0 : int i;
2140 : 0 : long ret;
2141 : :
2142 [ # # # # ]: 0 : for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) {
2143 : 0 : commit = old_crtc_state->commit;
2144 : :
2145 [ # # ]: 0 : if (!commit)
2146 : 0 : continue;
2147 : :
2148 : 0 : ret = wait_for_completion_timeout(&commit->hw_done,
2149 : : 10*HZ);
2150 [ # # ]: 0 : if (ret == 0)
2151 : 0 : DRM_ERROR("[CRTC:%d:%s] hw_done timed out\n",
2152 : : crtc->base.id, crtc->name);
2153 : :
2154 : : /* Currently no support for overwriting flips, hence
2155 : : * stall for previous one to execute completely. */
2156 : 0 : ret = wait_for_completion_timeout(&commit->flip_done,
2157 : : 10*HZ);
2158 [ # # ]: 0 : if (ret == 0)
2159 : 0 : DRM_ERROR("[CRTC:%d:%s] flip_done timed out\n",
2160 : : crtc->base.id, crtc->name);
2161 : : }
2162 : :
2163 [ # # # # ]: 0 : for_each_old_connector_in_state(old_state, conn, old_conn_state, i) {
2164 : 0 : commit = old_conn_state->commit;
2165 : :
2166 [ # # ]: 0 : if (!commit)
2167 : 0 : continue;
2168 : :
2169 : 0 : ret = wait_for_completion_timeout(&commit->hw_done,
2170 : : 10*HZ);
2171 [ # # ]: 0 : if (ret == 0)
2172 : 0 : DRM_ERROR("[CONNECTOR:%d:%s] hw_done timed out\n",
2173 : : conn->base.id, conn->name);
2174 : :
2175 : : /* Currently no support for overwriting flips, hence
2176 : : * stall for previous one to execute completely. */
2177 : 0 : ret = wait_for_completion_timeout(&commit->flip_done,
2178 : : 10*HZ);
2179 [ # # ]: 0 : if (ret == 0)
2180 : 0 : DRM_ERROR("[CONNECTOR:%d:%s] flip_done timed out\n",
2181 : : conn->base.id, conn->name);
2182 : : }
2183 : :
2184 [ # # # # ]: 0 : for_each_old_plane_in_state(old_state, plane, old_plane_state, i) {
2185 : 0 : commit = old_plane_state->commit;
2186 : :
2187 [ # # ]: 0 : if (!commit)
2188 : 0 : continue;
2189 : :
2190 : 0 : ret = wait_for_completion_timeout(&commit->hw_done,
2191 : : 10*HZ);
2192 [ # # ]: 0 : if (ret == 0)
2193 : 0 : DRM_ERROR("[PLANE:%d:%s] hw_done timed out\n",
2194 : : plane->base.id, plane->name);
2195 : :
2196 : : /* Currently no support for overwriting flips, hence
2197 : : * stall for previous one to execute completely. */
2198 : 0 : ret = wait_for_completion_timeout(&commit->flip_done,
2199 : : 10*HZ);
2200 [ # # ]: 0 : if (ret == 0)
2201 : 0 : DRM_ERROR("[PLANE:%d:%s] flip_done timed out\n",
2202 : : plane->base.id, plane->name);
2203 : : }
2204 : 0 : }
2205 : : EXPORT_SYMBOL(drm_atomic_helper_wait_for_dependencies);
2206 : :
2207 : : /**
2208 : : * drm_atomic_helper_fake_vblank - fake VBLANK events if needed
2209 : : * @old_state: atomic state object with old state structures
2210 : : *
2211 : : * This function walks all CRTCs and fakes VBLANK events on those with
2212 : : * &drm_crtc_state.no_vblank set to true and &drm_crtc_state.event != NULL.
2213 : : * The primary use of this function is writeback connectors working in oneshot
2214 : : * mode and faking VBLANK events. In this case they only fake the VBLANK event
2215 : : * when a job is queued, and any change to the pipeline that does not touch the
2216 : : * connector is leading to timeouts when calling
2217 : : * drm_atomic_helper_wait_for_vblanks() or
2218 : : * drm_atomic_helper_wait_for_flip_done().
2219 : : *
2220 : : * This is part of the atomic helper support for nonblocking commits, see
2221 : : * drm_atomic_helper_setup_commit() for an overview.
2222 : : */
2223 : 0 : void drm_atomic_helper_fake_vblank(struct drm_atomic_state *old_state)
2224 : : {
2225 : 0 : struct drm_crtc_state *new_crtc_state;
2226 : 0 : struct drm_crtc *crtc;
2227 : 0 : int i;
2228 : :
2229 [ # # # # ]: 0 : for_each_new_crtc_in_state(old_state, crtc, new_crtc_state, i) {
2230 : 0 : unsigned long flags;
2231 : :
2232 [ # # ]: 0 : if (!new_crtc_state->no_vblank)
2233 : 0 : continue;
2234 : :
2235 : 0 : spin_lock_irqsave(&old_state->dev->event_lock, flags);
2236 [ # # ]: 0 : if (new_crtc_state->event) {
2237 : 0 : drm_crtc_send_vblank_event(crtc,
2238 : : new_crtc_state->event);
2239 : 0 : new_crtc_state->event = NULL;
2240 : : }
2241 : 0 : spin_unlock_irqrestore(&old_state->dev->event_lock, flags);
2242 : : }
2243 : 0 : }
2244 : : EXPORT_SYMBOL(drm_atomic_helper_fake_vblank);
2245 : :
2246 : : /**
2247 : : * drm_atomic_helper_commit_hw_done - setup possible nonblocking commit
2248 : : * @old_state: atomic state object with old state structures
2249 : : *
2250 : : * This function is used to signal completion of the hardware commit step. After
2251 : : * this step the driver is not allowed to read or change any permanent software
2252 : : * or hardware modeset state. The only exception is state protected by other
2253 : : * means than &drm_modeset_lock locks.
2254 : : *
2255 : : * Drivers should try to postpone any expensive or delayed cleanup work after
2256 : : * this function is called.
2257 : : *
2258 : : * This is part of the atomic helper support for nonblocking commits, see
2259 : : * drm_atomic_helper_setup_commit() for an overview.
2260 : : */
2261 : 0 : void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *old_state)
2262 : : {
2263 : 0 : struct drm_crtc *crtc;
2264 : 0 : struct drm_crtc_state *old_crtc_state, *new_crtc_state;
2265 : 0 : struct drm_crtc_commit *commit;
2266 : 0 : int i;
2267 : :
2268 [ # # # # ]: 0 : for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
2269 : 0 : commit = new_crtc_state->commit;
2270 [ # # ]: 0 : if (!commit)
2271 : 0 : continue;
2272 : :
2273 : : /*
2274 : : * copy new_crtc_state->commit to old_crtc_state->commit,
2275 : : * it's unsafe to touch new_crtc_state after hw_done,
2276 : : * but we still need to do so in cleanup_done().
2277 : : */
2278 [ # # ]: 0 : if (old_crtc_state->commit)
2279 : 0 : drm_crtc_commit_put(old_crtc_state->commit);
2280 : :
2281 : 0 : old_crtc_state->commit = drm_crtc_commit_get(commit);
2282 : :
2283 : : /* backend must have consumed any event by now */
2284 [ # # ]: 0 : WARN_ON(new_crtc_state->event);
2285 : 0 : complete_all(&commit->hw_done);
2286 : : }
2287 : :
2288 [ # # ]: 0 : if (old_state->fake_commit) {
2289 : 0 : complete_all(&old_state->fake_commit->hw_done);
2290 : 0 : complete_all(&old_state->fake_commit->flip_done);
2291 : : }
2292 : 0 : }
2293 : : EXPORT_SYMBOL(drm_atomic_helper_commit_hw_done);
2294 : :
2295 : : /**
2296 : : * drm_atomic_helper_commit_cleanup_done - signal completion of commit
2297 : : * @old_state: atomic state object with old state structures
2298 : : *
2299 : : * This signals completion of the atomic update @old_state, including any
2300 : : * cleanup work. If used, it must be called right before calling
2301 : : * drm_atomic_state_put().
2302 : : *
2303 : : * This is part of the atomic helper support for nonblocking commits, see
2304 : : * drm_atomic_helper_setup_commit() for an overview.
2305 : : */
2306 : 0 : void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *old_state)
2307 : : {
2308 : 0 : struct drm_crtc *crtc;
2309 : 0 : struct drm_crtc_state *old_crtc_state;
2310 : 0 : struct drm_crtc_commit *commit;
2311 : 0 : int i;
2312 : :
2313 [ # # # # ]: 0 : for_each_old_crtc_in_state(old_state, crtc, old_crtc_state, i) {
2314 : 0 : commit = old_crtc_state->commit;
2315 [ # # # # ]: 0 : if (WARN_ON(!commit))
2316 : 0 : continue;
2317 : :
2318 : 0 : complete_all(&commit->cleanup_done);
2319 [ # # ]: 0 : WARN_ON(!try_wait_for_completion(&commit->hw_done));
2320 : :
2321 : 0 : spin_lock(&crtc->commit_lock);
2322 : 0 : list_del(&commit->commit_entry);
2323 : 0 : spin_unlock(&crtc->commit_lock);
2324 : : }
2325 : :
2326 [ # # ]: 0 : if (old_state->fake_commit) {
2327 : 0 : complete_all(&old_state->fake_commit->cleanup_done);
2328 [ # # ]: 0 : WARN_ON(!try_wait_for_completion(&old_state->fake_commit->hw_done));
2329 : : }
2330 : 0 : }
2331 : : EXPORT_SYMBOL(drm_atomic_helper_commit_cleanup_done);
2332 : :
2333 : : /**
2334 : : * drm_atomic_helper_prepare_planes - prepare plane resources before commit
2335 : : * @dev: DRM device
2336 : : * @state: atomic state object with new state structures
2337 : : *
2338 : : * This function prepares plane state, specifically framebuffers, for the new
2339 : : * configuration, by calling &drm_plane_helper_funcs.prepare_fb. If any failure
2340 : : * is encountered this function will call &drm_plane_helper_funcs.cleanup_fb on
2341 : : * any already successfully prepared framebuffer.
2342 : : *
2343 : : * Returns:
2344 : : * 0 on success, negative error code on failure.
2345 : : */
2346 : 0 : int drm_atomic_helper_prepare_planes(struct drm_device *dev,
2347 : : struct drm_atomic_state *state)
2348 : : {
2349 : 0 : struct drm_connector *connector;
2350 : 0 : struct drm_connector_state *new_conn_state;
2351 : 0 : struct drm_plane *plane;
2352 : 0 : struct drm_plane_state *new_plane_state;
2353 : 0 : int ret, i, j;
2354 : :
2355 [ # # # # ]: 0 : for_each_new_connector_in_state(state, connector, new_conn_state, i) {
2356 [ # # ]: 0 : if (!new_conn_state->writeback_job)
2357 : 0 : continue;
2358 : :
2359 : 0 : ret = drm_writeback_prepare_job(new_conn_state->writeback_job);
2360 [ # # ]: 0 : if (ret < 0)
2361 : 0 : return ret;
2362 : : }
2363 : :
2364 [ # # # # ]: 0 : for_each_new_plane_in_state(state, plane, new_plane_state, i) {
2365 : 0 : const struct drm_plane_helper_funcs *funcs;
2366 : :
2367 : 0 : funcs = plane->helper_private;
2368 : :
2369 [ # # ]: 0 : if (funcs->prepare_fb) {
2370 : 0 : ret = funcs->prepare_fb(plane, new_plane_state);
2371 [ # # ]: 0 : if (ret)
2372 : 0 : goto fail;
2373 : : }
2374 : : }
2375 : :
2376 : : return 0;
2377 : :
2378 : : fail:
2379 [ # # # # ]: 0 : for_each_new_plane_in_state(state, plane, new_plane_state, j) {
2380 : 0 : const struct drm_plane_helper_funcs *funcs;
2381 : :
2382 [ # # ]: 0 : if (j >= i)
2383 : 0 : continue;
2384 : :
2385 : 0 : funcs = plane->helper_private;
2386 : :
2387 [ # # ]: 0 : if (funcs->cleanup_fb)
2388 : 0 : funcs->cleanup_fb(plane, new_plane_state);
2389 : : }
2390 : :
2391 : : return ret;
2392 : : }
2393 : : EXPORT_SYMBOL(drm_atomic_helper_prepare_planes);
2394 : :
2395 : 0 : static bool plane_crtc_active(const struct drm_plane_state *state)
2396 : : {
2397 [ # # # # ]: 0 : return state->crtc && state->crtc->state->active;
2398 : : }
2399 : :
2400 : : /**
2401 : : * drm_atomic_helper_commit_planes - commit plane state
2402 : : * @dev: DRM device
2403 : : * @old_state: atomic state object with old state structures
2404 : : * @flags: flags for committing plane state
2405 : : *
2406 : : * This function commits the new plane state using the plane and atomic helper
2407 : : * functions for planes and CRTCs. It assumes that the atomic state has already
2408 : : * been pushed into the relevant object state pointers, since this step can no
2409 : : * longer fail.
2410 : : *
2411 : : * It still requires the global state object @old_state to know which planes and
2412 : : * crtcs need to be updated though.
2413 : : *
2414 : : * Note that this function does all plane updates across all CRTCs in one step.
2415 : : * If the hardware can't support this approach look at
2416 : : * drm_atomic_helper_commit_planes_on_crtc() instead.
2417 : : *
2418 : : * Plane parameters can be updated by applications while the associated CRTC is
2419 : : * disabled. The DRM/KMS core will store the parameters in the plane state,
2420 : : * which will be available to the driver when the CRTC is turned on. As a result
2421 : : * most drivers don't need to be immediately notified of plane updates for a
2422 : : * disabled CRTC.
2423 : : *
2424 : : * Unless otherwise needed, drivers are advised to set the ACTIVE_ONLY flag in
2425 : : * @flags in order not to receive plane update notifications related to a
2426 : : * disabled CRTC. This avoids the need to manually ignore plane updates in
2427 : : * driver code when the driver and/or hardware can't or just don't need to deal
2428 : : * with updates on disabled CRTCs, for example when supporting runtime PM.
2429 : : *
2430 : : * Drivers may set the NO_DISABLE_AFTER_MODESET flag in @flags if the relevant
2431 : : * display controllers require to disable a CRTC's planes when the CRTC is
2432 : : * disabled. This function would skip the &drm_plane_helper_funcs.atomic_disable
2433 : : * call for a plane if the CRTC of the old plane state needs a modesetting
2434 : : * operation. Of course, the drivers need to disable the planes in their CRTC
2435 : : * disable callbacks since no one else would do that.
2436 : : *
2437 : : * The drm_atomic_helper_commit() default implementation doesn't set the
2438 : : * ACTIVE_ONLY flag to most closely match the behaviour of the legacy helpers.
2439 : : * This should not be copied blindly by drivers.
2440 : : */
2441 : 0 : void drm_atomic_helper_commit_planes(struct drm_device *dev,
2442 : : struct drm_atomic_state *old_state,
2443 : : uint32_t flags)
2444 : : {
2445 : 0 : struct drm_crtc *crtc;
2446 : 0 : struct drm_crtc_state *old_crtc_state, *new_crtc_state;
2447 : 0 : struct drm_plane *plane;
2448 : 0 : struct drm_plane_state *old_plane_state, *new_plane_state;
2449 : 0 : int i;
2450 : 0 : bool active_only = flags & DRM_PLANE_COMMIT_ACTIVE_ONLY;
2451 : 0 : bool no_disable = flags & DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET;
2452 : :
2453 [ # # # # ]: 0 : for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
2454 : 0 : const struct drm_crtc_helper_funcs *funcs;
2455 : :
2456 : 0 : funcs = crtc->helper_private;
2457 : :
2458 [ # # # # ]: 0 : if (!funcs || !funcs->atomic_begin)
2459 : 0 : continue;
2460 : :
2461 [ # # # # ]: 0 : if (active_only && !new_crtc_state->active)
2462 : 0 : continue;
2463 : :
2464 : 0 : funcs->atomic_begin(crtc, old_crtc_state);
2465 : : }
2466 : :
2467 [ # # # # ]: 0 : for_each_oldnew_plane_in_state(old_state, plane, old_plane_state, new_plane_state, i) {
2468 : 0 : const struct drm_plane_helper_funcs *funcs;
2469 : 0 : bool disabling;
2470 : :
2471 : 0 : funcs = plane->helper_private;
2472 : :
2473 [ # # ]: 0 : if (!funcs)
2474 : 0 : continue;
2475 : :
2476 : 0 : disabling = drm_atomic_plane_disabling(old_plane_state,
2477 : : new_plane_state);
2478 : :
2479 [ # # ]: 0 : if (active_only) {
2480 : : /*
2481 : : * Skip planes related to inactive CRTCs. If the plane
2482 : : * is enabled use the state of the current CRTC. If the
2483 : : * plane is being disabled use the state of the old
2484 : : * CRTC to avoid skipping planes being disabled on an
2485 : : * active CRTC.
2486 : : */
2487 [ # # # # : 0 : if (!disabling && !plane_crtc_active(new_plane_state))
# # ]
2488 : 0 : continue;
2489 [ # # # # : 0 : if (disabling && !plane_crtc_active(old_plane_state))
# # ]
2490 : 0 : continue;
2491 : : }
2492 : :
2493 : : /*
2494 : : * Special-case disabling the plane if drivers support it.
2495 : : */
2496 [ # # # # ]: 0 : if (disabling && funcs->atomic_disable) {
2497 : 0 : struct drm_crtc_state *crtc_state;
2498 : :
2499 : 0 : crtc_state = old_plane_state->crtc->state;
2500 : :
2501 [ # # # # ]: 0 : if (drm_atomic_crtc_needs_modeset(crtc_state) &&
2502 : : no_disable)
2503 : 0 : continue;
2504 : :
2505 : 0 : funcs->atomic_disable(plane, old_plane_state);
2506 [ # # # # ]: 0 : } else if (new_plane_state->crtc || disabling) {
2507 : 0 : funcs->atomic_update(plane, old_plane_state);
2508 : : }
2509 : : }
2510 : :
2511 [ # # # # ]: 0 : for_each_oldnew_crtc_in_state(old_state, crtc, old_crtc_state, new_crtc_state, i) {
2512 : 0 : const struct drm_crtc_helper_funcs *funcs;
2513 : :
2514 : 0 : funcs = crtc->helper_private;
2515 : :
2516 [ # # # # ]: 0 : if (!funcs || !funcs->atomic_flush)
2517 : 0 : continue;
2518 : :
2519 [ # # # # ]: 0 : if (active_only && !new_crtc_state->active)
2520 : 0 : continue;
2521 : :
2522 : 0 : funcs->atomic_flush(crtc, old_crtc_state);
2523 : : }
2524 : 0 : }
2525 : : EXPORT_SYMBOL(drm_atomic_helper_commit_planes);
2526 : :
2527 : : /**
2528 : : * drm_atomic_helper_commit_planes_on_crtc - commit plane state for a CRTC
2529 : : * @old_crtc_state: atomic state object with the old CRTC state
2530 : : *
2531 : : * This function commits the new plane state using the plane and atomic helper
2532 : : * functions for planes on the specific CRTC. It assumes that the atomic state
2533 : : * has already been pushed into the relevant object state pointers, since this
2534 : : * step can no longer fail.
2535 : : *
2536 : : * This function is useful when plane updates should be done CRTC-by-CRTC
2537 : : * instead of one global step like drm_atomic_helper_commit_planes() does.
2538 : : *
2539 : : * This function can only be savely used when planes are not allowed to move
2540 : : * between different CRTCs because this function doesn't handle inter-CRTC
2541 : : * depencies. Callers need to ensure that either no such depencies exist,
2542 : : * resolve them through ordering of commit calls or through some other means.
2543 : : */
2544 : : void
2545 : 0 : drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state)
2546 : : {
2547 : 0 : const struct drm_crtc_helper_funcs *crtc_funcs;
2548 : 0 : struct drm_crtc *crtc = old_crtc_state->crtc;
2549 : 0 : struct drm_atomic_state *old_state = old_crtc_state->state;
2550 : 0 : struct drm_crtc_state *new_crtc_state =
2551 [ # # ]: 0 : drm_atomic_get_new_crtc_state(old_state, crtc);
2552 : 0 : struct drm_plane *plane;
2553 : 0 : unsigned plane_mask;
2554 : :
2555 : 0 : plane_mask = old_crtc_state->plane_mask;
2556 : 0 : plane_mask |= new_crtc_state->plane_mask;
2557 : :
2558 : 0 : crtc_funcs = crtc->helper_private;
2559 [ # # # # ]: 0 : if (crtc_funcs && crtc_funcs->atomic_begin)
2560 : 0 : crtc_funcs->atomic_begin(crtc, old_crtc_state);
2561 : :
2562 [ # # # # ]: 0 : drm_for_each_plane_mask(plane, crtc->dev, plane_mask) {
2563 : 0 : struct drm_plane_state *old_plane_state =
2564 [ # # ]: 0 : drm_atomic_get_old_plane_state(old_state, plane);
2565 [ # # ]: 0 : struct drm_plane_state *new_plane_state =
2566 : : drm_atomic_get_new_plane_state(old_state, plane);
2567 : 0 : const struct drm_plane_helper_funcs *plane_funcs;
2568 : :
2569 : 0 : plane_funcs = plane->helper_private;
2570 : :
2571 [ # # ]: 0 : if (!old_plane_state || !plane_funcs)
2572 : 0 : continue;
2573 : :
2574 [ # # # # : 0 : WARN_ON(new_plane_state->crtc &&
# # ]
2575 : : new_plane_state->crtc != crtc);
2576 : :
2577 [ # # ]: 0 : if (drm_atomic_plane_disabling(old_plane_state, new_plane_state) &&
2578 [ # # ]: 0 : plane_funcs->atomic_disable)
2579 : 0 : plane_funcs->atomic_disable(plane, old_plane_state);
2580 [ # # # # ]: 0 : else if (new_plane_state->crtc ||
2581 : 0 : drm_atomic_plane_disabling(old_plane_state, new_plane_state))
2582 : 0 : plane_funcs->atomic_update(plane, old_plane_state);
2583 : : }
2584 : :
2585 [ # # # # ]: 0 : if (crtc_funcs && crtc_funcs->atomic_flush)
2586 : 0 : crtc_funcs->atomic_flush(crtc, old_crtc_state);
2587 : 0 : }
2588 : : EXPORT_SYMBOL(drm_atomic_helper_commit_planes_on_crtc);
2589 : :
2590 : : /**
2591 : : * drm_atomic_helper_disable_planes_on_crtc - helper to disable CRTC's planes
2592 : : * @old_crtc_state: atomic state object with the old CRTC state
2593 : : * @atomic: if set, synchronize with CRTC's atomic_begin/flush hooks
2594 : : *
2595 : : * Disables all planes associated with the given CRTC. This can be
2596 : : * used for instance in the CRTC helper atomic_disable callback to disable
2597 : : * all planes.
2598 : : *
2599 : : * If the atomic-parameter is set the function calls the CRTC's
2600 : : * atomic_begin hook before and atomic_flush hook after disabling the
2601 : : * planes.
2602 : : *
2603 : : * It is a bug to call this function without having implemented the
2604 : : * &drm_plane_helper_funcs.atomic_disable plane hook.
2605 : : */
2606 : : void
2607 : 0 : drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state,
2608 : : bool atomic)
2609 : : {
2610 : 0 : struct drm_crtc *crtc = old_crtc_state->crtc;
2611 : 0 : const struct drm_crtc_helper_funcs *crtc_funcs =
2612 : : crtc->helper_private;
2613 : 0 : struct drm_plane *plane;
2614 : :
2615 [ # # # # ]: 0 : if (atomic && crtc_funcs && crtc_funcs->atomic_begin)
2616 : 0 : crtc_funcs->atomic_begin(crtc, NULL);
2617 : :
2618 [ # # # # ]: 0 : drm_atomic_crtc_state_for_each_plane(plane, old_crtc_state) {
2619 : 0 : const struct drm_plane_helper_funcs *plane_funcs =
2620 : : plane->helper_private;
2621 : :
2622 [ # # ]: 0 : if (!plane_funcs)
2623 : 0 : continue;
2624 : :
2625 [ # # ]: 0 : WARN_ON(!plane_funcs->atomic_disable);
2626 [ # # ]: 0 : if (plane_funcs->atomic_disable)
2627 : 0 : plane_funcs->atomic_disable(plane, NULL);
2628 : : }
2629 : :
2630 [ # # # # ]: 0 : if (atomic && crtc_funcs && crtc_funcs->atomic_flush)
2631 : 0 : crtc_funcs->atomic_flush(crtc, NULL);
2632 : 0 : }
2633 : : EXPORT_SYMBOL(drm_atomic_helper_disable_planes_on_crtc);
2634 : :
2635 : : /**
2636 : : * drm_atomic_helper_cleanup_planes - cleanup plane resources after commit
2637 : : * @dev: DRM device
2638 : : * @old_state: atomic state object with old state structures
2639 : : *
2640 : : * This function cleans up plane state, specifically framebuffers, from the old
2641 : : * configuration. Hence the old configuration must be perserved in @old_state to
2642 : : * be able to call this function.
2643 : : *
2644 : : * This function must also be called on the new state when the atomic update
2645 : : * fails at any point after calling drm_atomic_helper_prepare_planes().
2646 : : */
2647 : 0 : void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
2648 : : struct drm_atomic_state *old_state)
2649 : : {
2650 : 0 : struct drm_plane *plane;
2651 : 0 : struct drm_plane_state *old_plane_state, *new_plane_state;
2652 : 0 : int i;
2653 : :
2654 [ # # # # ]: 0 : for_each_oldnew_plane_in_state(old_state, plane, old_plane_state, new_plane_state, i) {
2655 : 0 : const struct drm_plane_helper_funcs *funcs;
2656 : 0 : struct drm_plane_state *plane_state;
2657 : :
2658 : : /*
2659 : : * This might be called before swapping when commit is aborted,
2660 : : * in which case we have to cleanup the new state.
2661 : : */
2662 [ # # ]: 0 : if (old_plane_state == plane->state)
2663 : : plane_state = new_plane_state;
2664 : : else
2665 : 0 : plane_state = old_plane_state;
2666 : :
2667 : 0 : funcs = plane->helper_private;
2668 : :
2669 [ # # ]: 0 : if (funcs->cleanup_fb)
2670 : 0 : funcs->cleanup_fb(plane, plane_state);
2671 : : }
2672 : 0 : }
2673 : : EXPORT_SYMBOL(drm_atomic_helper_cleanup_planes);
2674 : :
2675 : : /**
2676 : : * drm_atomic_helper_swap_state - store atomic state into current sw state
2677 : : * @state: atomic state
2678 : : * @stall: stall for preceeding commits
2679 : : *
2680 : : * This function stores the atomic state into the current state pointers in all
2681 : : * driver objects. It should be called after all failing steps have been done
2682 : : * and succeeded, but before the actual hardware state is committed.
2683 : : *
2684 : : * For cleanup and error recovery the current state for all changed objects will
2685 : : * be swapped into @state.
2686 : : *
2687 : : * With that sequence it fits perfectly into the plane prepare/cleanup sequence:
2688 : : *
2689 : : * 1. Call drm_atomic_helper_prepare_planes() with the staged atomic state.
2690 : : *
2691 : : * 2. Do any other steps that might fail.
2692 : : *
2693 : : * 3. Put the staged state into the current state pointers with this function.
2694 : : *
2695 : : * 4. Actually commit the hardware state.
2696 : : *
2697 : : * 5. Call drm_atomic_helper_cleanup_planes() with @state, which since step 3
2698 : : * contains the old state. Also do any other cleanup required with that state.
2699 : : *
2700 : : * @stall must be set when nonblocking commits for this driver directly access
2701 : : * the &drm_plane.state, &drm_crtc.state or &drm_connector.state pointer. With
2702 : : * the current atomic helpers this is almost always the case, since the helpers
2703 : : * don't pass the right state structures to the callbacks.
2704 : : *
2705 : : * Returns:
2706 : : *
2707 : : * Returns 0 on success. Can return -ERESTARTSYS when @stall is true and the
2708 : : * waiting for the previous commits has been interrupted.
2709 : : */
2710 : 0 : int drm_atomic_helper_swap_state(struct drm_atomic_state *state,
2711 : : bool stall)
2712 : : {
2713 : 0 : int i, ret;
2714 : 0 : struct drm_connector *connector;
2715 : 0 : struct drm_connector_state *old_conn_state, *new_conn_state;
2716 : 0 : struct drm_crtc *crtc;
2717 : 0 : struct drm_crtc_state *old_crtc_state, *new_crtc_state;
2718 : 0 : struct drm_plane *plane;
2719 : 0 : struct drm_plane_state *old_plane_state, *new_plane_state;
2720 : 0 : struct drm_crtc_commit *commit;
2721 : 0 : struct drm_private_obj *obj;
2722 : 0 : struct drm_private_state *old_obj_state, *new_obj_state;
2723 : :
2724 [ # # ]: 0 : if (stall) {
2725 : : /*
2726 : : * We have to stall for hw_done here before
2727 : : * drm_atomic_helper_wait_for_dependencies() because flip
2728 : : * depth > 1 is not yet supported by all drivers. As long as
2729 : : * obj->state is directly dereferenced anywhere in the drivers
2730 : : * atomic_commit_tail function, then it's unsafe to swap state
2731 : : * before drm_atomic_helper_commit_hw_done() is called.
2732 : : */
2733 : :
2734 [ # # # # ]: 0 : for_each_old_crtc_in_state(state, crtc, old_crtc_state, i) {
2735 : 0 : commit = old_crtc_state->commit;
2736 : :
2737 [ # # ]: 0 : if (!commit)
2738 : 0 : continue;
2739 : :
2740 : 0 : ret = wait_for_completion_interruptible(&commit->hw_done);
2741 [ # # ]: 0 : if (ret)
2742 : 0 : return ret;
2743 : : }
2744 : :
2745 [ # # # # ]: 0 : for_each_old_connector_in_state(state, connector, old_conn_state, i) {
2746 : 0 : commit = old_conn_state->commit;
2747 : :
2748 [ # # ]: 0 : if (!commit)
2749 : 0 : continue;
2750 : :
2751 : 0 : ret = wait_for_completion_interruptible(&commit->hw_done);
2752 [ # # ]: 0 : if (ret)
2753 : 0 : return ret;
2754 : : }
2755 : :
2756 [ # # # # ]: 0 : for_each_old_plane_in_state(state, plane, old_plane_state, i) {
2757 : 0 : commit = old_plane_state->commit;
2758 : :
2759 [ # # ]: 0 : if (!commit)
2760 : 0 : continue;
2761 : :
2762 : 0 : ret = wait_for_completion_interruptible(&commit->hw_done);
2763 [ # # ]: 0 : if (ret)
2764 : 0 : return ret;
2765 : : }
2766 : : }
2767 : :
2768 [ # # # # ]: 0 : for_each_oldnew_connector_in_state(state, connector, old_conn_state, new_conn_state, i) {
2769 [ # # ]: 0 : WARN_ON(connector->state != old_conn_state);
2770 : :
2771 : 0 : old_conn_state->state = state;
2772 : 0 : new_conn_state->state = NULL;
2773 : :
2774 : 0 : state->connectors[i].state = old_conn_state;
2775 : 0 : connector->state = new_conn_state;
2776 : : }
2777 : :
2778 [ # # # # ]: 0 : for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) {
2779 [ # # ]: 0 : WARN_ON(crtc->state != old_crtc_state);
2780 : :
2781 : 0 : old_crtc_state->state = state;
2782 : 0 : new_crtc_state->state = NULL;
2783 : :
2784 : 0 : state->crtcs[i].state = old_crtc_state;
2785 : 0 : crtc->state = new_crtc_state;
2786 : :
2787 [ # # ]: 0 : if (new_crtc_state->commit) {
2788 : 0 : spin_lock(&crtc->commit_lock);
2789 : 0 : list_add(&new_crtc_state->commit->commit_entry,
2790 : : &crtc->commit_list);
2791 : 0 : spin_unlock(&crtc->commit_lock);
2792 : :
2793 : 0 : new_crtc_state->commit->event = NULL;
2794 : : }
2795 : : }
2796 : :
2797 [ # # # # ]: 0 : for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
2798 [ # # ]: 0 : WARN_ON(plane->state != old_plane_state);
2799 : :
2800 : 0 : old_plane_state->state = state;
2801 : 0 : new_plane_state->state = NULL;
2802 : :
2803 : 0 : state->planes[i].state = old_plane_state;
2804 : 0 : plane->state = new_plane_state;
2805 : : }
2806 : :
2807 [ # # ]: 0 : for_each_oldnew_private_obj_in_state(state, obj, old_obj_state, new_obj_state, i) {
2808 [ # # ]: 0 : WARN_ON(obj->state != old_obj_state);
2809 : :
2810 : 0 : old_obj_state->state = state;
2811 : 0 : new_obj_state->state = NULL;
2812 : :
2813 : 0 : state->private_objs[i].state = old_obj_state;
2814 : 0 : obj->state = new_obj_state;
2815 : : }
2816 : :
2817 : : return 0;
2818 : : }
2819 : : EXPORT_SYMBOL(drm_atomic_helper_swap_state);
2820 : :
2821 : : /**
2822 : : * drm_atomic_helper_update_plane - Helper for primary plane update using atomic
2823 : : * @plane: plane object to update
2824 : : * @crtc: owning CRTC of owning plane
2825 : : * @fb: framebuffer to flip onto plane
2826 : : * @crtc_x: x offset of primary plane on @crtc
2827 : : * @crtc_y: y offset of primary plane on @crtc
2828 : : * @crtc_w: width of primary plane rectangle on @crtc
2829 : : * @crtc_h: height of primary plane rectangle on @crtc
2830 : : * @src_x: x offset of @fb for panning
2831 : : * @src_y: y offset of @fb for panning
2832 : : * @src_w: width of source rectangle in @fb
2833 : : * @src_h: height of source rectangle in @fb
2834 : : * @ctx: lock acquire context
2835 : : *
2836 : : * Provides a default plane update handler using the atomic driver interface.
2837 : : *
2838 : : * RETURNS:
2839 : : * Zero on success, error code on failure
2840 : : */
2841 : 0 : int drm_atomic_helper_update_plane(struct drm_plane *plane,
2842 : : struct drm_crtc *crtc,
2843 : : struct drm_framebuffer *fb,
2844 : : int crtc_x, int crtc_y,
2845 : : unsigned int crtc_w, unsigned int crtc_h,
2846 : : uint32_t src_x, uint32_t src_y,
2847 : : uint32_t src_w, uint32_t src_h,
2848 : : struct drm_modeset_acquire_ctx *ctx)
2849 : : {
2850 : 0 : struct drm_atomic_state *state;
2851 : 0 : struct drm_plane_state *plane_state;
2852 : 0 : int ret = 0;
2853 : :
2854 : 0 : state = drm_atomic_state_alloc(plane->dev);
2855 [ # # ]: 0 : if (!state)
2856 : : return -ENOMEM;
2857 : :
2858 : 0 : state->acquire_ctx = ctx;
2859 : 0 : plane_state = drm_atomic_get_plane_state(state, plane);
2860 [ # # ]: 0 : if (IS_ERR(plane_state)) {
2861 : 0 : ret = PTR_ERR(plane_state);
2862 : 0 : goto fail;
2863 : : }
2864 : :
2865 : 0 : ret = drm_atomic_set_crtc_for_plane(plane_state, crtc);
2866 [ # # ]: 0 : if (ret != 0)
2867 : 0 : goto fail;
2868 : 0 : drm_atomic_set_fb_for_plane(plane_state, fb);
2869 : 0 : plane_state->crtc_x = crtc_x;
2870 : 0 : plane_state->crtc_y = crtc_y;
2871 : 0 : plane_state->crtc_w = crtc_w;
2872 : 0 : plane_state->crtc_h = crtc_h;
2873 : 0 : plane_state->src_x = src_x;
2874 : 0 : plane_state->src_y = src_y;
2875 : 0 : plane_state->src_w = src_w;
2876 : 0 : plane_state->src_h = src_h;
2877 : :
2878 [ # # ]: 0 : if (plane == crtc->cursor)
2879 : 0 : state->legacy_cursor_update = true;
2880 : :
2881 : 0 : ret = drm_atomic_commit(state);
2882 : 0 : fail:
2883 : 0 : drm_atomic_state_put(state);
2884 : 0 : return ret;
2885 : : }
2886 : : EXPORT_SYMBOL(drm_atomic_helper_update_plane);
2887 : :
2888 : : /**
2889 : : * drm_atomic_helper_disable_plane - Helper for primary plane disable using * atomic
2890 : : * @plane: plane to disable
2891 : : * @ctx: lock acquire context
2892 : : *
2893 : : * Provides a default plane disable handler using the atomic driver interface.
2894 : : *
2895 : : * RETURNS:
2896 : : * Zero on success, error code on failure
2897 : : */
2898 : 0 : int drm_atomic_helper_disable_plane(struct drm_plane *plane,
2899 : : struct drm_modeset_acquire_ctx *ctx)
2900 : : {
2901 : 0 : struct drm_atomic_state *state;
2902 : 0 : struct drm_plane_state *plane_state;
2903 : 0 : int ret = 0;
2904 : :
2905 : 0 : state = drm_atomic_state_alloc(plane->dev);
2906 [ # # ]: 0 : if (!state)
2907 : : return -ENOMEM;
2908 : :
2909 : 0 : state->acquire_ctx = ctx;
2910 : 0 : plane_state = drm_atomic_get_plane_state(state, plane);
2911 [ # # ]: 0 : if (IS_ERR(plane_state)) {
2912 : 0 : ret = PTR_ERR(plane_state);
2913 : 0 : goto fail;
2914 : : }
2915 : :
2916 [ # # # # ]: 0 : if (plane_state->crtc && plane_state->crtc->cursor == plane)
2917 : 0 : plane_state->state->legacy_cursor_update = true;
2918 : :
2919 : 0 : ret = __drm_atomic_helper_disable_plane(plane, plane_state);
2920 [ # # ]: 0 : if (ret != 0)
2921 : 0 : goto fail;
2922 : :
2923 : 0 : ret = drm_atomic_commit(state);
2924 : 0 : fail:
2925 : 0 : drm_atomic_state_put(state);
2926 : 0 : return ret;
2927 : : }
2928 : : EXPORT_SYMBOL(drm_atomic_helper_disable_plane);
2929 : :
2930 : : /**
2931 : : * drm_atomic_helper_set_config - set a new config from userspace
2932 : : * @set: mode set configuration
2933 : : * @ctx: lock acquisition context
2934 : : *
2935 : : * Provides a default CRTC set_config handler using the atomic driver interface.
2936 : : *
2937 : : * NOTE: For backwards compatibility with old userspace this automatically
2938 : : * resets the "link-status" property to GOOD, to force any link
2939 : : * re-training. The SETCRTC ioctl does not define whether an update does
2940 : : * need a full modeset or just a plane update, hence we're allowed to do
2941 : : * that. See also drm_connector_set_link_status_property().
2942 : : *
2943 : : * Returns:
2944 : : * Returns 0 on success, negative errno numbers on failure.
2945 : : */
2946 : 0 : int drm_atomic_helper_set_config(struct drm_mode_set *set,
2947 : : struct drm_modeset_acquire_ctx *ctx)
2948 : : {
2949 : 0 : struct drm_atomic_state *state;
2950 : 0 : struct drm_crtc *crtc = set->crtc;
2951 : 0 : int ret = 0;
2952 : :
2953 : 0 : state = drm_atomic_state_alloc(crtc->dev);
2954 [ # # ]: 0 : if (!state)
2955 : : return -ENOMEM;
2956 : :
2957 : 0 : state->acquire_ctx = ctx;
2958 : 0 : ret = __drm_atomic_helper_set_config(set, state);
2959 [ # # ]: 0 : if (ret != 0)
2960 : 0 : goto fail;
2961 : :
2962 : 0 : ret = handle_conflicting_encoders(state, true);
2963 [ # # ]: 0 : if (ret)
2964 : : return ret;
2965 : :
2966 : 0 : ret = drm_atomic_commit(state);
2967 : :
2968 : 0 : fail:
2969 : 0 : drm_atomic_state_put(state);
2970 : 0 : return ret;
2971 : : }
2972 : : EXPORT_SYMBOL(drm_atomic_helper_set_config);
2973 : :
2974 : : /**
2975 : : * drm_atomic_helper_disable_all - disable all currently active outputs
2976 : : * @dev: DRM device
2977 : : * @ctx: lock acquisition context
2978 : : *
2979 : : * Loops through all connectors, finding those that aren't turned off and then
2980 : : * turns them off by setting their DPMS mode to OFF and deactivating the CRTC
2981 : : * that they are connected to.
2982 : : *
2983 : : * This is used for example in suspend/resume to disable all currently active
2984 : : * functions when suspending. If you just want to shut down everything at e.g.
2985 : : * driver unload, look at drm_atomic_helper_shutdown().
2986 : : *
2987 : : * Note that if callers haven't already acquired all modeset locks this might
2988 : : * return -EDEADLK, which must be handled by calling drm_modeset_backoff().
2989 : : *
2990 : : * Returns:
2991 : : * 0 on success or a negative error code on failure.
2992 : : *
2993 : : * See also:
2994 : : * drm_atomic_helper_suspend(), drm_atomic_helper_resume() and
2995 : : * drm_atomic_helper_shutdown().
2996 : : */
2997 : 0 : int drm_atomic_helper_disable_all(struct drm_device *dev,
2998 : : struct drm_modeset_acquire_ctx *ctx)
2999 : : {
3000 : 0 : struct drm_atomic_state *state;
3001 : 0 : struct drm_connector_state *conn_state;
3002 : 0 : struct drm_connector *conn;
3003 : 0 : struct drm_plane_state *plane_state;
3004 : 0 : struct drm_plane *plane;
3005 : 0 : struct drm_crtc_state *crtc_state;
3006 : 0 : struct drm_crtc *crtc;
3007 : 0 : int ret, i;
3008 : :
3009 : 0 : state = drm_atomic_state_alloc(dev);
3010 [ # # ]: 0 : if (!state)
3011 : : return -ENOMEM;
3012 : :
3013 : 0 : state->acquire_ctx = ctx;
3014 : :
3015 [ # # ]: 0 : drm_for_each_crtc(crtc, dev) {
3016 : 0 : crtc_state = drm_atomic_get_crtc_state(state, crtc);
3017 [ # # ]: 0 : if (IS_ERR(crtc_state)) {
3018 : 0 : ret = PTR_ERR(crtc_state);
3019 : 0 : goto free;
3020 : : }
3021 : :
3022 : 0 : crtc_state->active = false;
3023 : :
3024 : 0 : ret = drm_atomic_set_mode_prop_for_crtc(crtc_state, NULL);
3025 [ # # ]: 0 : if (ret < 0)
3026 : 0 : goto free;
3027 : :
3028 : 0 : ret = drm_atomic_add_affected_planes(state, crtc);
3029 [ # # ]: 0 : if (ret < 0)
3030 : 0 : goto free;
3031 : :
3032 : 0 : ret = drm_atomic_add_affected_connectors(state, crtc);
3033 [ # # ]: 0 : if (ret < 0)
3034 : 0 : goto free;
3035 : : }
3036 : :
3037 [ # # # # ]: 0 : for_each_new_connector_in_state(state, conn, conn_state, i) {
3038 : 0 : ret = drm_atomic_set_crtc_for_connector(conn_state, NULL);
3039 [ # # ]: 0 : if (ret < 0)
3040 : 0 : goto free;
3041 : : }
3042 : :
3043 [ # # # # ]: 0 : for_each_new_plane_in_state(state, plane, plane_state, i) {
3044 : 0 : ret = drm_atomic_set_crtc_for_plane(plane_state, NULL);
3045 [ # # ]: 0 : if (ret < 0)
3046 : 0 : goto free;
3047 : :
3048 : 0 : drm_atomic_set_fb_for_plane(plane_state, NULL);
3049 : : }
3050 : :
3051 : 0 : ret = drm_atomic_commit(state);
3052 : 0 : free:
3053 : 0 : drm_atomic_state_put(state);
3054 : 0 : return ret;
3055 : : }
3056 : : EXPORT_SYMBOL(drm_atomic_helper_disable_all);
3057 : :
3058 : : /**
3059 : : * drm_atomic_helper_shutdown - shutdown all CRTC
3060 : : * @dev: DRM device
3061 : : *
3062 : : * This shuts down all CRTC, which is useful for driver unloading. Shutdown on
3063 : : * suspend should instead be handled with drm_atomic_helper_suspend(), since
3064 : : * that also takes a snapshot of the modeset state to be restored on resume.
3065 : : *
3066 : : * This is just a convenience wrapper around drm_atomic_helper_disable_all(),
3067 : : * and it is the atomic version of drm_crtc_force_disable_all().
3068 : : */
3069 : 0 : void drm_atomic_helper_shutdown(struct drm_device *dev)
3070 : : {
3071 : 0 : struct drm_modeset_acquire_ctx ctx;
3072 : 0 : int ret;
3073 : :
3074 [ # # ]: 0 : DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
3075 : :
3076 : 0 : ret = drm_atomic_helper_disable_all(dev, &ctx);
3077 [ # # ]: 0 : if (ret)
3078 : 0 : DRM_ERROR("Disabling all crtc's during unload failed with %i\n", ret);
3079 : :
3080 [ # # # # ]: 0 : DRM_MODESET_LOCK_ALL_END(ctx, ret);
3081 : 0 : }
3082 : : EXPORT_SYMBOL(drm_atomic_helper_shutdown);
3083 : :
3084 : : /**
3085 : : * drm_atomic_helper_duplicate_state - duplicate an atomic state object
3086 : : * @dev: DRM device
3087 : : * @ctx: lock acquisition context
3088 : : *
3089 : : * Makes a copy of the current atomic state by looping over all objects and
3090 : : * duplicating their respective states. This is used for example by suspend/
3091 : : * resume support code to save the state prior to suspend such that it can
3092 : : * be restored upon resume.
3093 : : *
3094 : : * Note that this treats atomic state as persistent between save and restore.
3095 : : * Drivers must make sure that this is possible and won't result in confusion
3096 : : * or erroneous behaviour.
3097 : : *
3098 : : * Note that if callers haven't already acquired all modeset locks this might
3099 : : * return -EDEADLK, which must be handled by calling drm_modeset_backoff().
3100 : : *
3101 : : * Returns:
3102 : : * A pointer to the copy of the atomic state object on success or an
3103 : : * ERR_PTR()-encoded error code on failure.
3104 : : *
3105 : : * See also:
3106 : : * drm_atomic_helper_suspend(), drm_atomic_helper_resume()
3107 : : */
3108 : : struct drm_atomic_state *
3109 : 0 : drm_atomic_helper_duplicate_state(struct drm_device *dev,
3110 : : struct drm_modeset_acquire_ctx *ctx)
3111 : : {
3112 : 0 : struct drm_atomic_state *state;
3113 : 0 : struct drm_connector *conn;
3114 : 0 : struct drm_connector_list_iter conn_iter;
3115 : 0 : struct drm_plane *plane;
3116 : 0 : struct drm_crtc *crtc;
3117 : 0 : int err = 0;
3118 : :
3119 : 0 : state = drm_atomic_state_alloc(dev);
3120 [ # # ]: 0 : if (!state)
3121 : : return ERR_PTR(-ENOMEM);
3122 : :
3123 : 0 : state->acquire_ctx = ctx;
3124 : 0 : state->duplicated = true;
3125 : :
3126 [ # # ]: 0 : drm_for_each_crtc(crtc, dev) {
3127 : 0 : struct drm_crtc_state *crtc_state;
3128 : :
3129 : 0 : crtc_state = drm_atomic_get_crtc_state(state, crtc);
3130 [ # # ]: 0 : if (IS_ERR(crtc_state)) {
3131 : 0 : err = PTR_ERR(crtc_state);
3132 : 0 : goto free;
3133 : : }
3134 : : }
3135 : :
3136 [ # # ]: 0 : drm_for_each_plane(plane, dev) {
3137 : 0 : struct drm_plane_state *plane_state;
3138 : :
3139 : 0 : plane_state = drm_atomic_get_plane_state(state, plane);
3140 [ # # ]: 0 : if (IS_ERR(plane_state)) {
3141 : 0 : err = PTR_ERR(plane_state);
3142 : 0 : goto free;
3143 : : }
3144 : : }
3145 : :
3146 : 0 : drm_connector_list_iter_begin(dev, &conn_iter);
3147 [ # # ]: 0 : drm_for_each_connector_iter(conn, &conn_iter) {
3148 : 0 : struct drm_connector_state *conn_state;
3149 : :
3150 : 0 : conn_state = drm_atomic_get_connector_state(state, conn);
3151 [ # # ]: 0 : if (IS_ERR(conn_state)) {
3152 : 0 : err = PTR_ERR(conn_state);
3153 : 0 : drm_connector_list_iter_end(&conn_iter);
3154 : 0 : goto free;
3155 : : }
3156 : : }
3157 : 0 : drm_connector_list_iter_end(&conn_iter);
3158 : :
3159 : : /* clear the acquire context so that it isn't accidentally reused */
3160 : 0 : state->acquire_ctx = NULL;
3161 : :
3162 : 0 : free:
3163 [ # # ]: 0 : if (err < 0) {
3164 : 0 : drm_atomic_state_put(state);
3165 : 0 : state = ERR_PTR(err);
3166 : : }
3167 : :
3168 : : return state;
3169 : : }
3170 : : EXPORT_SYMBOL(drm_atomic_helper_duplicate_state);
3171 : :
3172 : : /**
3173 : : * drm_atomic_helper_suspend - subsystem-level suspend helper
3174 : : * @dev: DRM device
3175 : : *
3176 : : * Duplicates the current atomic state, disables all active outputs and then
3177 : : * returns a pointer to the original atomic state to the caller. Drivers can
3178 : : * pass this pointer to the drm_atomic_helper_resume() helper upon resume to
3179 : : * restore the output configuration that was active at the time the system
3180 : : * entered suspend.
3181 : : *
3182 : : * Note that it is potentially unsafe to use this. The atomic state object
3183 : : * returned by this function is assumed to be persistent. Drivers must ensure
3184 : : * that this holds true. Before calling this function, drivers must make sure
3185 : : * to suspend fbdev emulation so that nothing can be using the device.
3186 : : *
3187 : : * Returns:
3188 : : * A pointer to a copy of the state before suspend on success or an ERR_PTR()-
3189 : : * encoded error code on failure. Drivers should store the returned atomic
3190 : : * state object and pass it to the drm_atomic_helper_resume() helper upon
3191 : : * resume.
3192 : : *
3193 : : * See also:
3194 : : * drm_atomic_helper_duplicate_state(), drm_atomic_helper_disable_all(),
3195 : : * drm_atomic_helper_resume(), drm_atomic_helper_commit_duplicated_state()
3196 : : */
3197 : 0 : struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev)
3198 : : {
3199 : 0 : struct drm_modeset_acquire_ctx ctx;
3200 : 0 : struct drm_atomic_state *state;
3201 : 0 : int err;
3202 : :
3203 : : /* This can never be returned, but it makes the compiler happy */
3204 : 0 : state = ERR_PTR(-EINVAL);
3205 : :
3206 [ # # ]: 0 : DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err);
3207 : :
3208 : 0 : state = drm_atomic_helper_duplicate_state(dev, &ctx);
3209 [ # # ]: 0 : if (IS_ERR(state))
3210 : 0 : goto unlock;
3211 : :
3212 : 0 : err = drm_atomic_helper_disable_all(dev, &ctx);
3213 [ # # ]: 0 : if (err < 0) {
3214 : 0 : drm_atomic_state_put(state);
3215 : 0 : state = ERR_PTR(err);
3216 : 0 : goto unlock;
3217 : : }
3218 : :
3219 : 0 : unlock:
3220 [ # # # # ]: 0 : DRM_MODESET_LOCK_ALL_END(ctx, err);
3221 [ # # ]: 0 : if (err)
3222 : 0 : return ERR_PTR(err);
3223 : :
3224 : : return state;
3225 : : }
3226 : : EXPORT_SYMBOL(drm_atomic_helper_suspend);
3227 : :
3228 : : /**
3229 : : * drm_atomic_helper_commit_duplicated_state - commit duplicated state
3230 : : * @state: duplicated atomic state to commit
3231 : : * @ctx: pointer to acquire_ctx to use for commit.
3232 : : *
3233 : : * The state returned by drm_atomic_helper_duplicate_state() and
3234 : : * drm_atomic_helper_suspend() is partially invalid, and needs to
3235 : : * be fixed up before commit.
3236 : : *
3237 : : * Returns:
3238 : : * 0 on success or a negative error code on failure.
3239 : : *
3240 : : * See also:
3241 : : * drm_atomic_helper_suspend()
3242 : : */
3243 : 0 : int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state,
3244 : : struct drm_modeset_acquire_ctx *ctx)
3245 : : {
3246 : 0 : int i, ret;
3247 : 0 : struct drm_plane *plane;
3248 : 0 : struct drm_plane_state *new_plane_state;
3249 : 0 : struct drm_connector *connector;
3250 : 0 : struct drm_connector_state *new_conn_state;
3251 : 0 : struct drm_crtc *crtc;
3252 : 0 : struct drm_crtc_state *new_crtc_state;
3253 : :
3254 : 0 : state->acquire_ctx = ctx;
3255 : :
3256 [ # # # # ]: 0 : for_each_new_plane_in_state(state, plane, new_plane_state, i)
3257 : 0 : state->planes[i].old_state = plane->state;
3258 : :
3259 [ # # # # ]: 0 : for_each_new_crtc_in_state(state, crtc, new_crtc_state, i)
3260 : 0 : state->crtcs[i].old_state = crtc->state;
3261 : :
3262 [ # # # # ]: 0 : for_each_new_connector_in_state(state, connector, new_conn_state, i)
3263 : 0 : state->connectors[i].old_state = connector->state;
3264 : :
3265 : 0 : ret = drm_atomic_commit(state);
3266 : :
3267 : 0 : state->acquire_ctx = NULL;
3268 : :
3269 : 0 : return ret;
3270 : : }
3271 : : EXPORT_SYMBOL(drm_atomic_helper_commit_duplicated_state);
3272 : :
3273 : : /**
3274 : : * drm_atomic_helper_resume - subsystem-level resume helper
3275 : : * @dev: DRM device
3276 : : * @state: atomic state to resume to
3277 : : *
3278 : : * Calls drm_mode_config_reset() to synchronize hardware and software states,
3279 : : * grabs all modeset locks and commits the atomic state object. This can be
3280 : : * used in conjunction with the drm_atomic_helper_suspend() helper to
3281 : : * implement suspend/resume for drivers that support atomic mode-setting.
3282 : : *
3283 : : * Returns:
3284 : : * 0 on success or a negative error code on failure.
3285 : : *
3286 : : * See also:
3287 : : * drm_atomic_helper_suspend()
3288 : : */
3289 : 0 : int drm_atomic_helper_resume(struct drm_device *dev,
3290 : : struct drm_atomic_state *state)
3291 : : {
3292 : 0 : struct drm_modeset_acquire_ctx ctx;
3293 : 0 : int err;
3294 : :
3295 : 0 : drm_mode_config_reset(dev);
3296 : :
3297 [ # # ]: 0 : DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, err);
3298 : :
3299 : 0 : err = drm_atomic_helper_commit_duplicated_state(state, &ctx);
3300 : :
3301 [ # # # # ]: 0 : DRM_MODESET_LOCK_ALL_END(ctx, err);
3302 : 0 : drm_atomic_state_put(state);
3303 : :
3304 : 0 : return err;
3305 : : }
3306 : : EXPORT_SYMBOL(drm_atomic_helper_resume);
3307 : :
3308 : 0 : static int page_flip_common(struct drm_atomic_state *state,
3309 : : struct drm_crtc *crtc,
3310 : : struct drm_framebuffer *fb,
3311 : : struct drm_pending_vblank_event *event,
3312 : : uint32_t flags)
3313 : : {
3314 : 0 : struct drm_plane *plane = crtc->primary;
3315 : 0 : struct drm_plane_state *plane_state;
3316 : 0 : struct drm_crtc_state *crtc_state;
3317 : 0 : int ret = 0;
3318 : :
3319 : 0 : crtc_state = drm_atomic_get_crtc_state(state, crtc);
3320 [ # # ]: 0 : if (IS_ERR(crtc_state))
3321 : 0 : return PTR_ERR(crtc_state);
3322 : :
3323 : 0 : crtc_state->event = event;
3324 : 0 : crtc_state->async_flip = flags & DRM_MODE_PAGE_FLIP_ASYNC;
3325 : :
3326 : 0 : plane_state = drm_atomic_get_plane_state(state, plane);
3327 [ # # ]: 0 : if (IS_ERR(plane_state))
3328 : 0 : return PTR_ERR(plane_state);
3329 : :
3330 : 0 : ret = drm_atomic_set_crtc_for_plane(plane_state, crtc);
3331 [ # # ]: 0 : if (ret != 0)
3332 : : return ret;
3333 : 0 : drm_atomic_set_fb_for_plane(plane_state, fb);
3334 : :
3335 : : /* Make sure we don't accidentally do a full modeset. */
3336 : 0 : state->allow_modeset = false;
3337 [ # # ]: 0 : if (!crtc_state->active) {
3338 : 0 : DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled, rejecting legacy flip\n",
3339 : : crtc->base.id, crtc->name);
3340 : 0 : return -EINVAL;
3341 : : }
3342 : :
3343 : : return ret;
3344 : : }
3345 : :
3346 : : /**
3347 : : * drm_atomic_helper_page_flip - execute a legacy page flip
3348 : : * @crtc: DRM CRTC
3349 : : * @fb: DRM framebuffer
3350 : : * @event: optional DRM event to signal upon completion
3351 : : * @flags: flip flags for non-vblank sync'ed updates
3352 : : * @ctx: lock acquisition context
3353 : : *
3354 : : * Provides a default &drm_crtc_funcs.page_flip implementation
3355 : : * using the atomic driver interface.
3356 : : *
3357 : : * Returns:
3358 : : * Returns 0 on success, negative errno numbers on failure.
3359 : : *
3360 : : * See also:
3361 : : * drm_atomic_helper_page_flip_target()
3362 : : */
3363 : 0 : int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
3364 : : struct drm_framebuffer *fb,
3365 : : struct drm_pending_vblank_event *event,
3366 : : uint32_t flags,
3367 : : struct drm_modeset_acquire_ctx *ctx)
3368 : : {
3369 : 0 : struct drm_plane *plane = crtc->primary;
3370 : 0 : struct drm_atomic_state *state;
3371 : 0 : int ret = 0;
3372 : :
3373 : 0 : state = drm_atomic_state_alloc(plane->dev);
3374 [ # # ]: 0 : if (!state)
3375 : : return -ENOMEM;
3376 : :
3377 : 0 : state->acquire_ctx = ctx;
3378 : :
3379 : 0 : ret = page_flip_common(state, crtc, fb, event, flags);
3380 [ # # ]: 0 : if (ret != 0)
3381 : 0 : goto fail;
3382 : :
3383 : 0 : ret = drm_atomic_nonblocking_commit(state);
3384 : 0 : fail:
3385 : 0 : drm_atomic_state_put(state);
3386 : 0 : return ret;
3387 : : }
3388 : : EXPORT_SYMBOL(drm_atomic_helper_page_flip);
3389 : :
3390 : : /**
3391 : : * drm_atomic_helper_page_flip_target - do page flip on target vblank period.
3392 : : * @crtc: DRM CRTC
3393 : : * @fb: DRM framebuffer
3394 : : * @event: optional DRM event to signal upon completion
3395 : : * @flags: flip flags for non-vblank sync'ed updates
3396 : : * @target: specifying the target vblank period when the flip to take effect
3397 : : * @ctx: lock acquisition context
3398 : : *
3399 : : * Provides a default &drm_crtc_funcs.page_flip_target implementation.
3400 : : * Similar to drm_atomic_helper_page_flip() with extra parameter to specify
3401 : : * target vblank period to flip.
3402 : : *
3403 : : * Returns:
3404 : : * Returns 0 on success, negative errno numbers on failure.
3405 : : */
3406 : 0 : int drm_atomic_helper_page_flip_target(struct drm_crtc *crtc,
3407 : : struct drm_framebuffer *fb,
3408 : : struct drm_pending_vblank_event *event,
3409 : : uint32_t flags,
3410 : : uint32_t target,
3411 : : struct drm_modeset_acquire_ctx *ctx)
3412 : : {
3413 : 0 : struct drm_plane *plane = crtc->primary;
3414 : 0 : struct drm_atomic_state *state;
3415 : 0 : struct drm_crtc_state *crtc_state;
3416 : 0 : int ret = 0;
3417 : :
3418 : 0 : state = drm_atomic_state_alloc(plane->dev);
3419 [ # # ]: 0 : if (!state)
3420 : : return -ENOMEM;
3421 : :
3422 : 0 : state->acquire_ctx = ctx;
3423 : :
3424 : 0 : ret = page_flip_common(state, crtc, fb, event, flags);
3425 [ # # ]: 0 : if (ret != 0)
3426 : 0 : goto fail;
3427 : :
3428 [ # # ]: 0 : crtc_state = drm_atomic_get_new_crtc_state(state, crtc);
3429 [ # # # # ]: 0 : if (WARN_ON(!crtc_state)) {
3430 : 0 : ret = -EINVAL;
3431 : 0 : goto fail;
3432 : : }
3433 : 0 : crtc_state->target_vblank = target;
3434 : :
3435 : 0 : ret = drm_atomic_nonblocking_commit(state);
3436 : 0 : fail:
3437 : 0 : drm_atomic_state_put(state);
3438 : 0 : return ret;
3439 : : }
3440 : : EXPORT_SYMBOL(drm_atomic_helper_page_flip_target);
3441 : :
3442 : : /**
3443 : : * drm_atomic_helper_legacy_gamma_set - set the legacy gamma correction table
3444 : : * @crtc: CRTC object
3445 : : * @red: red correction table
3446 : : * @green: green correction table
3447 : : * @blue: green correction table
3448 : : * @size: size of the tables
3449 : : * @ctx: lock acquire context
3450 : : *
3451 : : * Implements support for legacy gamma correction table for drivers
3452 : : * that support color management through the DEGAMMA_LUT/GAMMA_LUT
3453 : : * properties. See drm_crtc_enable_color_mgmt() and the containing chapter for
3454 : : * how the atomic color management and gamma tables work.
3455 : : */
3456 : 0 : int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
3457 : : u16 *red, u16 *green, u16 *blue,
3458 : : uint32_t size,
3459 : : struct drm_modeset_acquire_ctx *ctx)
3460 : : {
3461 : 0 : struct drm_device *dev = crtc->dev;
3462 : 0 : struct drm_atomic_state *state;
3463 : 0 : struct drm_crtc_state *crtc_state;
3464 : 0 : struct drm_property_blob *blob = NULL;
3465 : 0 : struct drm_color_lut *blob_data;
3466 : 0 : int i, ret = 0;
3467 : 0 : bool replaced;
3468 : :
3469 : 0 : state = drm_atomic_state_alloc(crtc->dev);
3470 [ # # ]: 0 : if (!state)
3471 : : return -ENOMEM;
3472 : :
3473 : 0 : blob = drm_property_create_blob(dev,
3474 : : sizeof(struct drm_color_lut) * size,
3475 : : NULL);
3476 [ # # ]: 0 : if (IS_ERR(blob)) {
3477 : 0 : ret = PTR_ERR(blob);
3478 : 0 : blob = NULL;
3479 : 0 : goto fail;
3480 : : }
3481 : :
3482 : : /* Prepare GAMMA_LUT with the legacy values. */
3483 : 0 : blob_data = blob->data;
3484 [ # # ]: 0 : for (i = 0; i < size; i++) {
3485 : 0 : blob_data[i].red = red[i];
3486 : 0 : blob_data[i].green = green[i];
3487 : 0 : blob_data[i].blue = blue[i];
3488 : : }
3489 : :
3490 : 0 : state->acquire_ctx = ctx;
3491 : 0 : crtc_state = drm_atomic_get_crtc_state(state, crtc);
3492 [ # # ]: 0 : if (IS_ERR(crtc_state)) {
3493 : 0 : ret = PTR_ERR(crtc_state);
3494 : 0 : goto fail;
3495 : : }
3496 : :
3497 : : /* Reset DEGAMMA_LUT and CTM properties. */
3498 : 0 : replaced = drm_property_replace_blob(&crtc_state->degamma_lut, NULL);
3499 : 0 : replaced |= drm_property_replace_blob(&crtc_state->ctm, NULL);
3500 : 0 : replaced |= drm_property_replace_blob(&crtc_state->gamma_lut, blob);
3501 : 0 : crtc_state->color_mgmt_changed |= replaced;
3502 : :
3503 : 0 : ret = drm_atomic_commit(state);
3504 : :
3505 : 0 : fail:
3506 : 0 : drm_atomic_state_put(state);
3507 : 0 : drm_property_blob_put(blob);
3508 : 0 : return ret;
3509 : : }
3510 : : EXPORT_SYMBOL(drm_atomic_helper_legacy_gamma_set);
|
