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cc4ceb48 DV |
1 | /* |
2 | * Copyright (C) 2014 Red Hat | |
3 | * Copyright (C) 2014 Intel Corp. | |
4 | * | |
5 | * Permission is hereby granted, free of charge, to any person obtaining a | |
6 | * copy of this software and associated documentation files (the "Software"), | |
7 | * to deal in the Software without restriction, including without limitation | |
8 | * the rights to use, copy, modify, merge, publish, distribute, sublicense, | |
9 | * and/or sell copies of the Software, and to permit persons to whom the | |
10 | * Software is furnished to do so, subject to the following conditions: | |
11 | * | |
12 | * The above copyright notice and this permission notice shall be included in | |
13 | * all copies or substantial portions of the Software. | |
14 | * | |
15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR | |
16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL | |
18 | * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR | |
19 | * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, | |
20 | * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR | |
21 | * OTHER DEALINGS IN THE SOFTWARE. | |
22 | * | |
23 | * Authors: | |
24 | * Rob Clark <robdclark@gmail.com> | |
25 | * Daniel Vetter <daniel.vetter@ffwll.ch> | |
26 | */ | |
27 | ||
28 | ||
29 | #include <drm/drmP.h> | |
30 | #include <drm/drm_atomic.h> | |
72fdb40c | 31 | #include <drm/drm_atomic_uapi.h> |
5488dc16 | 32 | #include <drm/drm_mode.h> |
fceffb32 | 33 | #include <drm/drm_print.h> |
935774cd | 34 | #include <drm/drm_writeback.h> |
96260142 | 35 | #include <linux/sync_file.h> |
cc4ceb48 | 36 | |
be35f94f | 37 | #include "drm_crtc_internal.h" |
f02b604b | 38 | #include "drm_internal.h" |
be35f94f | 39 | |
b3ba3f6f | 40 | void __drm_crtc_commit_free(struct kref *kref) |
3b24f7d6 DV |
41 | { |
42 | struct drm_crtc_commit *commit = | |
43 | container_of(kref, struct drm_crtc_commit, ref); | |
44 | ||
45 | kfree(commit); | |
46 | } | |
b3ba3f6f | 47 | EXPORT_SYMBOL(__drm_crtc_commit_free); |
3b24f7d6 | 48 | |
036ef573 ML |
49 | /** |
50 | * drm_atomic_state_default_release - | |
51 | * release memory initialized by drm_atomic_state_init | |
52 | * @state: atomic state | |
53 | * | |
54 | * Free all the memory allocated by drm_atomic_state_init. | |
da6c0596 DV |
55 | * This should only be used by drivers which are still subclassing |
56 | * &drm_atomic_state and haven't switched to &drm_private_state yet. | |
036ef573 ML |
57 | */ |
58 | void drm_atomic_state_default_release(struct drm_atomic_state *state) | |
cc4ceb48 DV |
59 | { |
60 | kfree(state->connectors); | |
cc4ceb48 | 61 | kfree(state->crtcs); |
cc4ceb48 | 62 | kfree(state->planes); |
b430c27a | 63 | kfree(state->private_objs); |
cc4ceb48 | 64 | } |
036ef573 | 65 | EXPORT_SYMBOL(drm_atomic_state_default_release); |
cc4ceb48 DV |
66 | |
67 | /** | |
036ef573 | 68 | * drm_atomic_state_init - init new atomic state |
cc4ceb48 | 69 | * @dev: DRM device |
036ef573 | 70 | * @state: atomic state |
cc4ceb48 | 71 | * |
036ef573 | 72 | * Default implementation for filling in a new atomic state. |
da6c0596 DV |
73 | * This should only be used by drivers which are still subclassing |
74 | * &drm_atomic_state and haven't switched to &drm_private_state yet. | |
cc4ceb48 | 75 | */ |
036ef573 ML |
76 | int |
77 | drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state) | |
cc4ceb48 | 78 | { |
0853695c CW |
79 | kref_init(&state->ref); |
80 | ||
d34f20d6 RC |
81 | /* TODO legacy paths should maybe do a better job about |
82 | * setting this appropriately? | |
83 | */ | |
84 | state->allow_modeset = true; | |
85 | ||
cc4ceb48 DV |
86 | state->crtcs = kcalloc(dev->mode_config.num_crtc, |
87 | sizeof(*state->crtcs), GFP_KERNEL); | |
88 | if (!state->crtcs) | |
89 | goto fail; | |
cc4ceb48 DV |
90 | state->planes = kcalloc(dev->mode_config.num_total_plane, |
91 | sizeof(*state->planes), GFP_KERNEL); | |
92 | if (!state->planes) | |
93 | goto fail; | |
cc4ceb48 DV |
94 | |
95 | state->dev = dev; | |
96 | ||
036ef573 | 97 | DRM_DEBUG_ATOMIC("Allocated atomic state %p\n", state); |
cc4ceb48 | 98 | |
036ef573 | 99 | return 0; |
cc4ceb48 | 100 | fail: |
036ef573 ML |
101 | drm_atomic_state_default_release(state); |
102 | return -ENOMEM; | |
103 | } | |
104 | EXPORT_SYMBOL(drm_atomic_state_init); | |
105 | ||
106 | /** | |
107 | * drm_atomic_state_alloc - allocate atomic state | |
108 | * @dev: DRM device | |
109 | * | |
110 | * This allocates an empty atomic state to track updates. | |
111 | */ | |
112 | struct drm_atomic_state * | |
113 | drm_atomic_state_alloc(struct drm_device *dev) | |
114 | { | |
115 | struct drm_mode_config *config = &dev->mode_config; | |
036ef573 ML |
116 | |
117 | if (!config->funcs->atomic_state_alloc) { | |
ac7c7483 DK |
118 | struct drm_atomic_state *state; |
119 | ||
036ef573 ML |
120 | state = kzalloc(sizeof(*state), GFP_KERNEL); |
121 | if (!state) | |
122 | return NULL; | |
123 | if (drm_atomic_state_init(dev, state) < 0) { | |
124 | kfree(state); | |
125 | return NULL; | |
126 | } | |
127 | return state; | |
128 | } | |
cc4ceb48 | 129 | |
036ef573 | 130 | return config->funcs->atomic_state_alloc(dev); |
cc4ceb48 DV |
131 | } |
132 | EXPORT_SYMBOL(drm_atomic_state_alloc); | |
133 | ||
134 | /** | |
036ef573 | 135 | * drm_atomic_state_default_clear - clear base atomic state |
cc4ceb48 DV |
136 | * @state: atomic state |
137 | * | |
036ef573 | 138 | * Default implementation for clearing atomic state. |
da6c0596 DV |
139 | * This should only be used by drivers which are still subclassing |
140 | * &drm_atomic_state and haven't switched to &drm_private_state yet. | |
cc4ceb48 | 141 | */ |
036ef573 | 142 | void drm_atomic_state_default_clear(struct drm_atomic_state *state) |
cc4ceb48 DV |
143 | { |
144 | struct drm_device *dev = state->dev; | |
6f75cea6 | 145 | struct drm_mode_config *config = &dev->mode_config; |
cc4ceb48 DV |
146 | int i; |
147 | ||
17a38d9c | 148 | DRM_DEBUG_ATOMIC("Clearing atomic state %p\n", state); |
cc4ceb48 | 149 | |
f52b69f1 | 150 | for (i = 0; i < state->num_connector; i++) { |
63e83c1d | 151 | struct drm_connector *connector = state->connectors[i].ptr; |
cc4ceb48 DV |
152 | |
153 | if (!connector) | |
154 | continue; | |
155 | ||
d2307dea | 156 | connector->funcs->atomic_destroy_state(connector, |
63e83c1d DV |
157 | state->connectors[i].state); |
158 | state->connectors[i].ptr = NULL; | |
159 | state->connectors[i].state = NULL; | |
f0b408ee VS |
160 | state->connectors[i].old_state = NULL; |
161 | state->connectors[i].new_state = NULL; | |
ad093607 | 162 | drm_connector_put(connector); |
cc4ceb48 DV |
163 | } |
164 | ||
6f75cea6 | 165 | for (i = 0; i < config->num_crtc; i++) { |
5d943aa6 | 166 | struct drm_crtc *crtc = state->crtcs[i].ptr; |
cc4ceb48 DV |
167 | |
168 | if (!crtc) | |
169 | continue; | |
170 | ||
171 | crtc->funcs->atomic_destroy_state(crtc, | |
5d943aa6 | 172 | state->crtcs[i].state); |
3b24f7d6 | 173 | |
5d943aa6 DV |
174 | state->crtcs[i].ptr = NULL; |
175 | state->crtcs[i].state = NULL; | |
f0b408ee VS |
176 | state->crtcs[i].old_state = NULL; |
177 | state->crtcs[i].new_state = NULL; | |
4364bcb2 LL |
178 | |
179 | if (state->crtcs[i].commit) { | |
180 | drm_crtc_commit_put(state->crtcs[i].commit); | |
181 | state->crtcs[i].commit = NULL; | |
182 | } | |
cc4ceb48 DV |
183 | } |
184 | ||
6f75cea6 | 185 | for (i = 0; i < config->num_total_plane; i++) { |
b8b5342b | 186 | struct drm_plane *plane = state->planes[i].ptr; |
cc4ceb48 DV |
187 | |
188 | if (!plane) | |
189 | continue; | |
190 | ||
191 | plane->funcs->atomic_destroy_state(plane, | |
b8b5342b DV |
192 | state->planes[i].state); |
193 | state->planes[i].ptr = NULL; | |
194 | state->planes[i].state = NULL; | |
f0b408ee VS |
195 | state->planes[i].old_state = NULL; |
196 | state->planes[i].new_state = NULL; | |
cc4ceb48 | 197 | } |
b430c27a PD |
198 | |
199 | for (i = 0; i < state->num_private_objs; i++) { | |
a4370c77 | 200 | struct drm_private_obj *obj = state->private_objs[i].ptr; |
b430c27a | 201 | |
a4370c77 VS |
202 | obj->funcs->atomic_destroy_state(obj, |
203 | state->private_objs[i].state); | |
204 | state->private_objs[i].ptr = NULL; | |
205 | state->private_objs[i].state = NULL; | |
b5cb2e5a VS |
206 | state->private_objs[i].old_state = NULL; |
207 | state->private_objs[i].new_state = NULL; | |
b430c27a PD |
208 | } |
209 | state->num_private_objs = 0; | |
210 | ||
21a01abb ML |
211 | if (state->fake_commit) { |
212 | drm_crtc_commit_put(state->fake_commit); | |
213 | state->fake_commit = NULL; | |
214 | } | |
cc4ceb48 | 215 | } |
036ef573 ML |
216 | EXPORT_SYMBOL(drm_atomic_state_default_clear); |
217 | ||
218 | /** | |
219 | * drm_atomic_state_clear - clear state object | |
220 | * @state: atomic state | |
221 | * | |
222 | * When the w/w mutex algorithm detects a deadlock we need to back off and drop | |
223 | * all locks. So someone else could sneak in and change the current modeset | |
224 | * configuration. Which means that all the state assembled in @state is no | |
225 | * longer an atomic update to the current state, but to some arbitrary earlier | |
d574528a DV |
226 | * state. Which could break assumptions the driver's |
227 | * &drm_mode_config_funcs.atomic_check likely relies on. | |
036ef573 ML |
228 | * |
229 | * Hence we must clear all cached state and completely start over, using this | |
230 | * function. | |
231 | */ | |
232 | void drm_atomic_state_clear(struct drm_atomic_state *state) | |
233 | { | |
234 | struct drm_device *dev = state->dev; | |
235 | struct drm_mode_config *config = &dev->mode_config; | |
236 | ||
237 | if (config->funcs->atomic_state_clear) | |
238 | config->funcs->atomic_state_clear(state); | |
239 | else | |
240 | drm_atomic_state_default_clear(state); | |
241 | } | |
cc4ceb48 DV |
242 | EXPORT_SYMBOL(drm_atomic_state_clear); |
243 | ||
244 | /** | |
0853695c CW |
245 | * __drm_atomic_state_free - free all memory for an atomic state |
246 | * @ref: This atomic state to deallocate | |
cc4ceb48 DV |
247 | * |
248 | * This frees all memory associated with an atomic state, including all the | |
249 | * per-object state for planes, crtcs and connectors. | |
250 | */ | |
0853695c | 251 | void __drm_atomic_state_free(struct kref *ref) |
cc4ceb48 | 252 | { |
0853695c CW |
253 | struct drm_atomic_state *state = container_of(ref, typeof(*state), ref); |
254 | struct drm_mode_config *config = &state->dev->mode_config; | |
036ef573 | 255 | |
cc4ceb48 DV |
256 | drm_atomic_state_clear(state); |
257 | ||
17a38d9c | 258 | DRM_DEBUG_ATOMIC("Freeing atomic state %p\n", state); |
cc4ceb48 | 259 | |
036ef573 ML |
260 | if (config->funcs->atomic_state_free) { |
261 | config->funcs->atomic_state_free(state); | |
262 | } else { | |
263 | drm_atomic_state_default_release(state); | |
264 | kfree(state); | |
265 | } | |
cc4ceb48 | 266 | } |
0853695c | 267 | EXPORT_SYMBOL(__drm_atomic_state_free); |
cc4ceb48 DV |
268 | |
269 | /** | |
270 | * drm_atomic_get_crtc_state - get crtc state | |
271 | * @state: global atomic state object | |
272 | * @crtc: crtc to get state object for | |
273 | * | |
274 | * This function returns the crtc state for the given crtc, allocating it if | |
275 | * needed. It will also grab the relevant crtc lock to make sure that the state | |
276 | * is consistent. | |
277 | * | |
278 | * Returns: | |
279 | * | |
280 | * Either the allocated state or the error code encoded into the pointer. When | |
281 | * the error is EDEADLK then the w/w mutex code has detected a deadlock and the | |
282 | * entire atomic sequence must be restarted. All other errors are fatal. | |
283 | */ | |
284 | struct drm_crtc_state * | |
285 | drm_atomic_get_crtc_state(struct drm_atomic_state *state, | |
286 | struct drm_crtc *crtc) | |
287 | { | |
1b26a5e1 | 288 | int ret, index = drm_crtc_index(crtc); |
cc4ceb48 DV |
289 | struct drm_crtc_state *crtc_state; |
290 | ||
7f4eaa89 ML |
291 | WARN_ON(!state->acquire_ctx); |
292 | ||
1b26a5e1 ML |
293 | crtc_state = drm_atomic_get_existing_crtc_state(state, crtc); |
294 | if (crtc_state) | |
295 | return crtc_state; | |
cc4ceb48 DV |
296 | |
297 | ret = drm_modeset_lock(&crtc->mutex, state->acquire_ctx); | |
298 | if (ret) | |
299 | return ERR_PTR(ret); | |
300 | ||
301 | crtc_state = crtc->funcs->atomic_duplicate_state(crtc); | |
302 | if (!crtc_state) | |
303 | return ERR_PTR(-ENOMEM); | |
304 | ||
5d943aa6 | 305 | state->crtcs[index].state = crtc_state; |
581e49fe ML |
306 | state->crtcs[index].old_state = crtc->state; |
307 | state->crtcs[index].new_state = crtc_state; | |
5d943aa6 | 308 | state->crtcs[index].ptr = crtc; |
cc4ceb48 DV |
309 | crtc_state->state = state; |
310 | ||
fa3ab4c2 VS |
311 | DRM_DEBUG_ATOMIC("Added [CRTC:%d:%s] %p state to %p\n", |
312 | crtc->base.id, crtc->name, crtc_state, state); | |
cc4ceb48 DV |
313 | |
314 | return crtc_state; | |
315 | } | |
316 | EXPORT_SYMBOL(drm_atomic_get_crtc_state); | |
317 | ||
b2432adf VS |
318 | static int drm_atomic_crtc_check(const struct drm_crtc_state *old_crtc_state, |
319 | const struct drm_crtc_state *new_crtc_state) | |
5e743737 | 320 | { |
b2432adf VS |
321 | struct drm_crtc *crtc = new_crtc_state->crtc; |
322 | ||
5e743737 RC |
323 | /* NOTE: we explicitly don't enforce constraints such as primary |
324 | * layer covering entire screen, since that is something we want | |
325 | * to allow (on hw that supports it). For hw that does not, it | |
326 | * should be checked in driver's crtc->atomic_check() vfunc. | |
327 | * | |
328 | * TODO: Add generic modeset state checks once we support those. | |
329 | */ | |
eab3bbef | 330 | |
b2432adf | 331 | if (new_crtc_state->active && !new_crtc_state->enable) { |
fa3ab4c2 VS |
332 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] active without enabled\n", |
333 | crtc->base.id, crtc->name); | |
eab3bbef DV |
334 | return -EINVAL; |
335 | } | |
336 | ||
99cf4a29 DS |
337 | /* The state->enable vs. state->mode_blob checks can be WARN_ON, |
338 | * as this is a kernel-internal detail that userspace should never | |
339 | * be able to trigger. */ | |
340 | if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && | |
b2432adf | 341 | WARN_ON(new_crtc_state->enable && !new_crtc_state->mode_blob)) { |
fa3ab4c2 VS |
342 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] enabled without mode blob\n", |
343 | crtc->base.id, crtc->name); | |
99cf4a29 DS |
344 | return -EINVAL; |
345 | } | |
346 | ||
347 | if (drm_core_check_feature(crtc->dev, DRIVER_ATOMIC) && | |
b2432adf | 348 | WARN_ON(!new_crtc_state->enable && new_crtc_state->mode_blob)) { |
fa3ab4c2 VS |
349 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] disabled with mode blob\n", |
350 | crtc->base.id, crtc->name); | |
99cf4a29 DS |
351 | return -EINVAL; |
352 | } | |
353 | ||
4cba6850 DV |
354 | /* |
355 | * Reject event generation for when a CRTC is off and stays off. | |
356 | * It wouldn't be hard to implement this, but userspace has a track | |
357 | * record of happily burning through 100% cpu (or worse, crash) when the | |
358 | * display pipe is suspended. To avoid all that fun just reject updates | |
359 | * that ask for events since likely that indicates a bug in the | |
360 | * compositor's drawing loop. This is consistent with the vblank IOCTL | |
361 | * and legacy page_flip IOCTL which also reject service on a disabled | |
362 | * pipe. | |
363 | */ | |
b2432adf VS |
364 | if (new_crtc_state->event && |
365 | !new_crtc_state->active && !old_crtc_state->active) { | |
6ac7c548 RK |
366 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requesting event but off\n", |
367 | crtc->base.id, crtc->name); | |
4cba6850 DV |
368 | return -EINVAL; |
369 | } | |
370 | ||
5e743737 RC |
371 | return 0; |
372 | } | |
373 | ||
fceffb32 RC |
374 | static void drm_atomic_crtc_print_state(struct drm_printer *p, |
375 | const struct drm_crtc_state *state) | |
376 | { | |
377 | struct drm_crtc *crtc = state->crtc; | |
378 | ||
379 | drm_printf(p, "crtc[%u]: %s\n", crtc->base.id, crtc->name); | |
380 | drm_printf(p, "\tenable=%d\n", state->enable); | |
381 | drm_printf(p, "\tactive=%d\n", state->active); | |
382 | drm_printf(p, "\tplanes_changed=%d\n", state->planes_changed); | |
383 | drm_printf(p, "\tmode_changed=%d\n", state->mode_changed); | |
384 | drm_printf(p, "\tactive_changed=%d\n", state->active_changed); | |
385 | drm_printf(p, "\tconnectors_changed=%d\n", state->connectors_changed); | |
386 | drm_printf(p, "\tcolor_mgmt_changed=%d\n", state->color_mgmt_changed); | |
387 | drm_printf(p, "\tplane_mask=%x\n", state->plane_mask); | |
388 | drm_printf(p, "\tconnector_mask=%x\n", state->connector_mask); | |
389 | drm_printf(p, "\tencoder_mask=%x\n", state->encoder_mask); | |
390 | drm_printf(p, "\tmode: " DRM_MODE_FMT "\n", DRM_MODE_ARG(&state->mode)); | |
391 | ||
392 | if (crtc->funcs->atomic_print_state) | |
393 | crtc->funcs->atomic_print_state(p, state); | |
394 | } | |
395 | ||
935774cd BS |
396 | static int drm_atomic_connector_check(struct drm_connector *connector, |
397 | struct drm_connector_state *state) | |
398 | { | |
399 | struct drm_crtc_state *crtc_state; | |
400 | struct drm_writeback_job *writeback_job = state->writeback_job; | |
47e22ff1 RS |
401 | const struct drm_display_info *info = &connector->display_info; |
402 | ||
403 | state->max_bpc = info->bpc ? info->bpc : 8; | |
404 | if (connector->max_bpc_property) | |
405 | state->max_bpc = min(state->max_bpc, state->max_requested_bpc); | |
935774cd BS |
406 | |
407 | if ((connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) || !writeback_job) | |
408 | return 0; | |
409 | ||
410 | if (writeback_job->fb && !state->crtc) { | |
411 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] framebuffer without CRTC\n", | |
412 | connector->base.id, connector->name); | |
413 | return -EINVAL; | |
414 | } | |
415 | ||
416 | if (state->crtc) | |
417 | crtc_state = drm_atomic_get_existing_crtc_state(state->state, | |
418 | state->crtc); | |
419 | ||
420 | if (writeback_job->fb && !crtc_state->active) { | |
421 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] has framebuffer, but [CRTC:%d] is off\n", | |
422 | connector->base.id, connector->name, | |
423 | state->crtc->base.id); | |
424 | return -EINVAL; | |
425 | } | |
426 | ||
b13cc8dd BS |
427 | if (writeback_job->out_fence && !writeback_job->fb) { |
428 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] requesting out-fence without framebuffer\n", | |
429 | connector->base.id, connector->name); | |
430 | return -EINVAL; | |
431 | } | |
432 | ||
935774cd BS |
433 | return 0; |
434 | } | |
435 | ||
cc4ceb48 DV |
436 | /** |
437 | * drm_atomic_get_plane_state - get plane state | |
438 | * @state: global atomic state object | |
439 | * @plane: plane to get state object for | |
440 | * | |
441 | * This function returns the plane state for the given plane, allocating it if | |
442 | * needed. It will also grab the relevant plane lock to make sure that the state | |
443 | * is consistent. | |
444 | * | |
445 | * Returns: | |
446 | * | |
447 | * Either the allocated state or the error code encoded into the pointer. When | |
448 | * the error is EDEADLK then the w/w mutex code has detected a deadlock and the | |
449 | * entire atomic sequence must be restarted. All other errors are fatal. | |
450 | */ | |
451 | struct drm_plane_state * | |
452 | drm_atomic_get_plane_state(struct drm_atomic_state *state, | |
453 | struct drm_plane *plane) | |
454 | { | |
1b26a5e1 | 455 | int ret, index = drm_plane_index(plane); |
cc4ceb48 DV |
456 | struct drm_plane_state *plane_state; |
457 | ||
7f4eaa89 ML |
458 | WARN_ON(!state->acquire_ctx); |
459 | ||
e00fb856 VS |
460 | /* the legacy pointers should never be set */ |
461 | WARN_ON(plane->fb); | |
462 | WARN_ON(plane->old_fb); | |
463 | WARN_ON(plane->crtc); | |
464 | ||
1b26a5e1 ML |
465 | plane_state = drm_atomic_get_existing_plane_state(state, plane); |
466 | if (plane_state) | |
467 | return plane_state; | |
cc4ceb48 | 468 | |
4d02e2de | 469 | ret = drm_modeset_lock(&plane->mutex, state->acquire_ctx); |
cc4ceb48 DV |
470 | if (ret) |
471 | return ERR_PTR(ret); | |
472 | ||
473 | plane_state = plane->funcs->atomic_duplicate_state(plane); | |
474 | if (!plane_state) | |
475 | return ERR_PTR(-ENOMEM); | |
476 | ||
b8b5342b DV |
477 | state->planes[index].state = plane_state; |
478 | state->planes[index].ptr = plane; | |
581e49fe ML |
479 | state->planes[index].old_state = plane->state; |
480 | state->planes[index].new_state = plane_state; | |
cc4ceb48 DV |
481 | plane_state->state = state; |
482 | ||
9f4c97a2 VS |
483 | DRM_DEBUG_ATOMIC("Added [PLANE:%d:%s] %p state to %p\n", |
484 | plane->base.id, plane->name, plane_state, state); | |
cc4ceb48 DV |
485 | |
486 | if (plane_state->crtc) { | |
487 | struct drm_crtc_state *crtc_state; | |
488 | ||
489 | crtc_state = drm_atomic_get_crtc_state(state, | |
490 | plane_state->crtc); | |
491 | if (IS_ERR(crtc_state)) | |
492 | return ERR_CAST(crtc_state); | |
493 | } | |
494 | ||
495 | return plane_state; | |
496 | } | |
497 | EXPORT_SYMBOL(drm_atomic_get_plane_state); | |
498 | ||
f8aeb41c | 499 | static bool |
d9be05b7 VS |
500 | plane_switching_crtc(const struct drm_plane_state *old_plane_state, |
501 | const struct drm_plane_state *new_plane_state) | |
f8aeb41c | 502 | { |
d9be05b7 | 503 | if (!old_plane_state->crtc || !new_plane_state->crtc) |
f8aeb41c DV |
504 | return false; |
505 | ||
d9be05b7 | 506 | if (old_plane_state->crtc == new_plane_state->crtc) |
f8aeb41c DV |
507 | return false; |
508 | ||
509 | /* This could be refined, but currently there's no helper or driver code | |
510 | * to implement direct switching of active planes nor userspace to take | |
511 | * advantage of more direct plane switching without the intermediate | |
512 | * full OFF state. | |
513 | */ | |
514 | return true; | |
515 | } | |
516 | ||
5e743737 RC |
517 | /** |
518 | * drm_atomic_plane_check - check plane state | |
d9be05b7 VS |
519 | * @old_plane_state: old plane state to check |
520 | * @new_plane_state: new plane state to check | |
5e743737 RC |
521 | * |
522 | * Provides core sanity checks for plane state. | |
523 | * | |
524 | * RETURNS: | |
525 | * Zero on success, error code on failure | |
526 | */ | |
d9be05b7 VS |
527 | static int drm_atomic_plane_check(const struct drm_plane_state *old_plane_state, |
528 | const struct drm_plane_state *new_plane_state) | |
5e743737 | 529 | { |
d9be05b7 VS |
530 | struct drm_plane *plane = new_plane_state->plane; |
531 | struct drm_crtc *crtc = new_plane_state->crtc; | |
532 | const struct drm_framebuffer *fb = new_plane_state->fb; | |
5e743737 | 533 | unsigned int fb_width, fb_height; |
d3b21767 LS |
534 | struct drm_mode_rect *clips; |
535 | uint32_t num_clips; | |
ead8610d | 536 | int ret; |
5e743737 RC |
537 | |
538 | /* either *both* CRTC and FB must be set, or neither */ | |
d9be05b7 | 539 | if (crtc && !fb) { |
b6f690ab VS |
540 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] CRTC set but no FB\n", |
541 | plane->base.id, plane->name); | |
5e743737 | 542 | return -EINVAL; |
d9be05b7 | 543 | } else if (fb && !crtc) { |
b6f690ab VS |
544 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] FB set but no CRTC\n", |
545 | plane->base.id, plane->name); | |
5e743737 RC |
546 | return -EINVAL; |
547 | } | |
548 | ||
549 | /* if disabled, we don't care about the rest of the state: */ | |
d9be05b7 | 550 | if (!crtc) |
5e743737 RC |
551 | return 0; |
552 | ||
553 | /* Check whether this plane is usable on this CRTC */ | |
d9be05b7 | 554 | if (!(plane->possible_crtcs & drm_crtc_mask(crtc))) { |
b6f690ab | 555 | DRM_DEBUG_ATOMIC("Invalid [CRTC:%d:%s] for [PLANE:%d:%s]\n", |
d9be05b7 | 556 | crtc->base.id, crtc->name, |
b6f690ab | 557 | plane->base.id, plane->name); |
5e743737 RC |
558 | return -EINVAL; |
559 | } | |
560 | ||
561 | /* Check whether this plane supports the fb pixel format. */ | |
d9be05b7 VS |
562 | ret = drm_plane_check_pixel_format(plane, fb->format->format, |
563 | fb->modifier); | |
ead8610d | 564 | if (ret) { |
b3c11ac2 | 565 | struct drm_format_name_buf format_name; |
b6f690ab VS |
566 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid pixel format %s, modifier 0x%llx\n", |
567 | plane->base.id, plane->name, | |
d9be05b7 | 568 | drm_get_format_name(fb->format->format, |
23163a7d | 569 | &format_name), |
d9be05b7 | 570 | fb->modifier); |
ead8610d | 571 | return ret; |
5e743737 RC |
572 | } |
573 | ||
574 | /* Give drivers some help against integer overflows */ | |
d9be05b7 VS |
575 | if (new_plane_state->crtc_w > INT_MAX || |
576 | new_plane_state->crtc_x > INT_MAX - (int32_t) new_plane_state->crtc_w || | |
577 | new_plane_state->crtc_h > INT_MAX || | |
578 | new_plane_state->crtc_y > INT_MAX - (int32_t) new_plane_state->crtc_h) { | |
b6f690ab VS |
579 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid CRTC coordinates %ux%u+%d+%d\n", |
580 | plane->base.id, plane->name, | |
d9be05b7 VS |
581 | new_plane_state->crtc_w, new_plane_state->crtc_h, |
582 | new_plane_state->crtc_x, new_plane_state->crtc_y); | |
5e743737 RC |
583 | return -ERANGE; |
584 | } | |
585 | ||
d9be05b7 VS |
586 | fb_width = fb->width << 16; |
587 | fb_height = fb->height << 16; | |
5e743737 RC |
588 | |
589 | /* Make sure source coordinates are inside the fb. */ | |
d9be05b7 VS |
590 | if (new_plane_state->src_w > fb_width || |
591 | new_plane_state->src_x > fb_width - new_plane_state->src_w || | |
592 | new_plane_state->src_h > fb_height || | |
593 | new_plane_state->src_y > fb_height - new_plane_state->src_h) { | |
b6f690ab | 594 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid source coordinates " |
0338f0d0 | 595 | "%u.%06ux%u.%06u+%u.%06u+%u.%06u (fb %ux%u)\n", |
b6f690ab | 596 | plane->base.id, plane->name, |
d9be05b7 VS |
597 | new_plane_state->src_w >> 16, |
598 | ((new_plane_state->src_w & 0xffff) * 15625) >> 10, | |
599 | new_plane_state->src_h >> 16, | |
600 | ((new_plane_state->src_h & 0xffff) * 15625) >> 10, | |
601 | new_plane_state->src_x >> 16, | |
602 | ((new_plane_state->src_x & 0xffff) * 15625) >> 10, | |
603 | new_plane_state->src_y >> 16, | |
604 | ((new_plane_state->src_y & 0xffff) * 15625) >> 10, | |
605 | fb->width, fb->height); | |
5e743737 RC |
606 | return -ENOSPC; |
607 | } | |
608 | ||
d3b21767 LS |
609 | clips = drm_plane_get_damage_clips(new_plane_state); |
610 | num_clips = drm_plane_get_damage_clips_count(new_plane_state); | |
611 | ||
612 | /* Make sure damage clips are valid and inside the fb. */ | |
613 | while (num_clips > 0) { | |
614 | if (clips->x1 >= clips->x2 || | |
615 | clips->y1 >= clips->y2 || | |
616 | clips->x1 < 0 || | |
617 | clips->y1 < 0 || | |
618 | clips->x2 > fb_width || | |
619 | clips->y2 > fb_height) { | |
620 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] invalid damage clip %d %d %d %d\n", | |
621 | plane->base.id, plane->name, clips->x1, | |
622 | clips->y1, clips->x2, clips->y2); | |
623 | return -EINVAL; | |
624 | } | |
625 | clips++; | |
626 | num_clips--; | |
627 | } | |
628 | ||
d9be05b7 | 629 | if (plane_switching_crtc(old_plane_state, new_plane_state)) { |
9f4c97a2 VS |
630 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] switching CRTC directly\n", |
631 | plane->base.id, plane->name); | |
f8aeb41c DV |
632 | return -EINVAL; |
633 | } | |
634 | ||
5e743737 RC |
635 | return 0; |
636 | } | |
637 | ||
fceffb32 RC |
638 | static void drm_atomic_plane_print_state(struct drm_printer *p, |
639 | const struct drm_plane_state *state) | |
640 | { | |
641 | struct drm_plane *plane = state->plane; | |
642 | struct drm_rect src = drm_plane_state_src(state); | |
643 | struct drm_rect dest = drm_plane_state_dest(state); | |
644 | ||
645 | drm_printf(p, "plane[%u]: %s\n", plane->base.id, plane->name); | |
646 | drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)"); | |
647 | drm_printf(p, "\tfb=%u\n", state->fb ? state->fb->base.id : 0); | |
f02b604b NT |
648 | if (state->fb) |
649 | drm_framebuffer_print_info(p, 2, state->fb); | |
fceffb32 RC |
650 | drm_printf(p, "\tcrtc-pos=" DRM_RECT_FMT "\n", DRM_RECT_ARG(&dest)); |
651 | drm_printf(p, "\tsrc-pos=" DRM_RECT_FP_FMT "\n", DRM_RECT_FP_ARG(&src)); | |
652 | drm_printf(p, "\trotation=%x\n", state->rotation); | |
f8878bb2 | 653 | drm_printf(p, "\tnormalized-zpos=%x\n", state->normalized_zpos); |
56dbbaff VS |
654 | drm_printf(p, "\tcolor-encoding=%s\n", |
655 | drm_get_color_encoding_name(state->color_encoding)); | |
656 | drm_printf(p, "\tcolor-range=%s\n", | |
657 | drm_get_color_range_name(state->color_range)); | |
fceffb32 RC |
658 | |
659 | if (plane->funcs->atomic_print_state) | |
660 | plane->funcs->atomic_print_state(p, state); | |
661 | } | |
662 | ||
da6c0596 DV |
663 | /** |
664 | * DOC: handling driver private state | |
665 | * | |
666 | * Very often the DRM objects exposed to userspace in the atomic modeset api | |
667 | * (&drm_connector, &drm_crtc and &drm_plane) do not map neatly to the | |
668 | * underlying hardware. Especially for any kind of shared resources (e.g. shared | |
669 | * clocks, scaler units, bandwidth and fifo limits shared among a group of | |
670 | * planes or CRTCs, and so on) it makes sense to model these as independent | |
671 | * objects. Drivers then need to do similar state tracking and commit ordering for | |
672 | * such private (since not exposed to userpace) objects as the atomic core and | |
673 | * helpers already provide for connectors, planes and CRTCs. | |
674 | * | |
675 | * To make this easier on drivers the atomic core provides some support to track | |
676 | * driver private state objects using struct &drm_private_obj, with the | |
677 | * associated state struct &drm_private_state. | |
678 | * | |
679 | * Similar to userspace-exposed objects, private state structures can be | |
680 | * acquired by calling drm_atomic_get_private_obj_state(). Since this function | |
681 | * does not take care of locking, drivers should wrap it for each type of | |
682 | * private state object they have with the required call to drm_modeset_lock() | |
683 | * for the corresponding &drm_modeset_lock. | |
684 | * | |
685 | * All private state structures contained in a &drm_atomic_state update can be | |
686 | * iterated using for_each_oldnew_private_obj_in_state(), | |
687 | * for_each_new_private_obj_in_state() and for_each_old_private_obj_in_state(). | |
688 | * Drivers are recommended to wrap these for each type of driver private state | |
689 | * object they have, filtering on &drm_private_obj.funcs using for_each_if(), at | |
690 | * least if they want to iterate over all objects of a given type. | |
691 | * | |
692 | * An earlier way to handle driver private state was by subclassing struct | |
693 | * &drm_atomic_state. But since that encourages non-standard ways to implement | |
694 | * the check/commit split atomic requires (by using e.g. "check and rollback or | |
695 | * commit instead" of "duplicate state, check, then either commit or release | |
696 | * duplicated state) it is deprecated in favour of using &drm_private_state. | |
697 | */ | |
698 | ||
a4370c77 VS |
699 | /** |
700 | * drm_atomic_private_obj_init - initialize private object | |
b962a120 | 701 | * @dev: DRM device this object will be attached to |
a4370c77 VS |
702 | * @obj: private object |
703 | * @state: initial private object state | |
704 | * @funcs: pointer to the struct of function pointers that identify the object | |
705 | * type | |
706 | * | |
707 | * Initialize the private object, which can be embedded into any | |
708 | * driver private object that needs its own atomic state. | |
709 | */ | |
710 | void | |
b962a120 RC |
711 | drm_atomic_private_obj_init(struct drm_device *dev, |
712 | struct drm_private_obj *obj, | |
a4370c77 VS |
713 | struct drm_private_state *state, |
714 | const struct drm_private_state_funcs *funcs) | |
715 | { | |
716 | memset(obj, 0, sizeof(*obj)); | |
717 | ||
b962a120 RC |
718 | drm_modeset_lock_init(&obj->lock); |
719 | ||
a4370c77 VS |
720 | obj->state = state; |
721 | obj->funcs = funcs; | |
b962a120 | 722 | list_add_tail(&obj->head, &dev->mode_config.privobj_list); |
a4370c77 VS |
723 | } |
724 | EXPORT_SYMBOL(drm_atomic_private_obj_init); | |
725 | ||
726 | /** | |
727 | * drm_atomic_private_obj_fini - finalize private object | |
728 | * @obj: private object | |
729 | * | |
730 | * Finalize the private object. | |
731 | */ | |
732 | void | |
733 | drm_atomic_private_obj_fini(struct drm_private_obj *obj) | |
734 | { | |
b962a120 | 735 | list_del(&obj->head); |
a4370c77 | 736 | obj->funcs->atomic_destroy_state(obj, obj->state); |
b962a120 | 737 | drm_modeset_lock_fini(&obj->lock); |
a4370c77 VS |
738 | } |
739 | EXPORT_SYMBOL(drm_atomic_private_obj_fini); | |
740 | ||
b430c27a PD |
741 | /** |
742 | * drm_atomic_get_private_obj_state - get private object state | |
743 | * @state: global atomic state | |
744 | * @obj: private object to get the state for | |
b430c27a PD |
745 | * |
746 | * This function returns the private object state for the given private object, | |
b962a120 RC |
747 | * allocating the state if needed. It will also grab the relevant private |
748 | * object lock to make sure that the state is consistent. | |
b430c27a PD |
749 | * |
750 | * RETURNS: | |
751 | * | |
752 | * Either the allocated state or the error code encoded into a pointer. | |
753 | */ | |
a4370c77 VS |
754 | struct drm_private_state * |
755 | drm_atomic_get_private_obj_state(struct drm_atomic_state *state, | |
756 | struct drm_private_obj *obj) | |
b430c27a | 757 | { |
b962a120 | 758 | int index, num_objs, i, ret; |
b430c27a PD |
759 | size_t size; |
760 | struct __drm_private_objs_state *arr; | |
a4370c77 | 761 | struct drm_private_state *obj_state; |
b430c27a PD |
762 | |
763 | for (i = 0; i < state->num_private_objs; i++) | |
a4370c77 VS |
764 | if (obj == state->private_objs[i].ptr) |
765 | return state->private_objs[i].state; | |
b430c27a | 766 | |
b962a120 RC |
767 | ret = drm_modeset_lock(&obj->lock, state->acquire_ctx); |
768 | if (ret) | |
769 | return ERR_PTR(ret); | |
770 | ||
b430c27a PD |
771 | num_objs = state->num_private_objs + 1; |
772 | size = sizeof(*state->private_objs) * num_objs; | |
773 | arr = krealloc(state->private_objs, size, GFP_KERNEL); | |
774 | if (!arr) | |
775 | return ERR_PTR(-ENOMEM); | |
776 | ||
777 | state->private_objs = arr; | |
778 | index = state->num_private_objs; | |
779 | memset(&state->private_objs[index], 0, sizeof(*state->private_objs)); | |
780 | ||
a4370c77 VS |
781 | obj_state = obj->funcs->atomic_duplicate_state(obj); |
782 | if (!obj_state) | |
b430c27a PD |
783 | return ERR_PTR(-ENOMEM); |
784 | ||
a4370c77 VS |
785 | state->private_objs[index].state = obj_state; |
786 | state->private_objs[index].old_state = obj->state; | |
787 | state->private_objs[index].new_state = obj_state; | |
788 | state->private_objs[index].ptr = obj; | |
e89ea355 | 789 | obj_state->state = state; |
a4370c77 | 790 | |
b430c27a PD |
791 | state->num_private_objs = num_objs; |
792 | ||
a4370c77 VS |
793 | DRM_DEBUG_ATOMIC("Added new private object %p state %p to %p\n", |
794 | obj, obj_state, state); | |
b430c27a | 795 | |
a4370c77 | 796 | return obj_state; |
b430c27a PD |
797 | } |
798 | EXPORT_SYMBOL(drm_atomic_get_private_obj_state); | |
799 | ||
cc4ceb48 DV |
800 | /** |
801 | * drm_atomic_get_connector_state - get connector state | |
802 | * @state: global atomic state object | |
803 | * @connector: connector to get state object for | |
804 | * | |
805 | * This function returns the connector state for the given connector, | |
806 | * allocating it if needed. It will also grab the relevant connector lock to | |
807 | * make sure that the state is consistent. | |
808 | * | |
809 | * Returns: | |
810 | * | |
811 | * Either the allocated state or the error code encoded into the pointer. When | |
812 | * the error is EDEADLK then the w/w mutex code has detected a deadlock and the | |
813 | * entire atomic sequence must be restarted. All other errors are fatal. | |
814 | */ | |
815 | struct drm_connector_state * | |
816 | drm_atomic_get_connector_state(struct drm_atomic_state *state, | |
817 | struct drm_connector *connector) | |
818 | { | |
819 | int ret, index; | |
820 | struct drm_mode_config *config = &connector->dev->mode_config; | |
821 | struct drm_connector_state *connector_state; | |
822 | ||
7f4eaa89 ML |
823 | WARN_ON(!state->acquire_ctx); |
824 | ||
c7eb76f4 DV |
825 | ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); |
826 | if (ret) | |
827 | return ERR_PTR(ret); | |
828 | ||
cc4ceb48 DV |
829 | index = drm_connector_index(connector); |
830 | ||
f52b69f1 | 831 | if (index >= state->num_connector) { |
63e83c1d | 832 | struct __drm_connnectors_state *c; |
5fff80bb ML |
833 | int alloc = max(index + 1, config->num_connector); |
834 | ||
835 | c = krealloc(state->connectors, alloc * sizeof(*state->connectors), GFP_KERNEL); | |
836 | if (!c) | |
837 | return ERR_PTR(-ENOMEM); | |
838 | ||
839 | state->connectors = c; | |
840 | memset(&state->connectors[state->num_connector], 0, | |
841 | sizeof(*state->connectors) * (alloc - state->num_connector)); | |
842 | ||
5fff80bb | 843 | state->num_connector = alloc; |
f52b69f1 DV |
844 | } |
845 | ||
63e83c1d DV |
846 | if (state->connectors[index].state) |
847 | return state->connectors[index].state; | |
cc4ceb48 | 848 | |
cc4ceb48 DV |
849 | connector_state = connector->funcs->atomic_duplicate_state(connector); |
850 | if (!connector_state) | |
851 | return ERR_PTR(-ENOMEM); | |
852 | ||
ad093607 | 853 | drm_connector_get(connector); |
63e83c1d | 854 | state->connectors[index].state = connector_state; |
581e49fe ML |
855 | state->connectors[index].old_state = connector->state; |
856 | state->connectors[index].new_state = connector_state; | |
63e83c1d | 857 | state->connectors[index].ptr = connector; |
cc4ceb48 DV |
858 | connector_state->state = state; |
859 | ||
6ac7c548 RK |
860 | DRM_DEBUG_ATOMIC("Added [CONNECTOR:%d:%s] %p state to %p\n", |
861 | connector->base.id, connector->name, | |
862 | connector_state, state); | |
cc4ceb48 DV |
863 | |
864 | if (connector_state->crtc) { | |
865 | struct drm_crtc_state *crtc_state; | |
866 | ||
867 | crtc_state = drm_atomic_get_crtc_state(state, | |
868 | connector_state->crtc); | |
869 | if (IS_ERR(crtc_state)) | |
870 | return ERR_CAST(crtc_state); | |
871 | } | |
872 | ||
873 | return connector_state; | |
874 | } | |
875 | EXPORT_SYMBOL(drm_atomic_get_connector_state); | |
876 | ||
fceffb32 RC |
877 | static void drm_atomic_connector_print_state(struct drm_printer *p, |
878 | const struct drm_connector_state *state) | |
879 | { | |
880 | struct drm_connector *connector = state->connector; | |
881 | ||
882 | drm_printf(p, "connector[%u]: %s\n", connector->base.id, connector->name); | |
883 | drm_printf(p, "\tcrtc=%s\n", state->crtc ? state->crtc->name : "(null)"); | |
884 | ||
8cbc5caf BS |
885 | if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK) |
886 | if (state->writeback_job && state->writeback_job->fb) | |
887 | drm_printf(p, "\tfb=%d\n", state->writeback_job->fb->base.id); | |
888 | ||
fceffb32 RC |
889 | if (connector->funcs->atomic_print_state) |
890 | connector->funcs->atomic_print_state(p, state); | |
891 | } | |
892 | ||
cc4ceb48 DV |
893 | /** |
894 | * drm_atomic_add_affected_connectors - add connectors for crtc | |
895 | * @state: atomic state | |
896 | * @crtc: DRM crtc | |
897 | * | |
898 | * This function walks the current configuration and adds all connectors | |
899 | * currently using @crtc to the atomic configuration @state. Note that this | |
900 | * function must acquire the connection mutex. This can potentially cause | |
901 | * unneeded seralization if the update is just for the planes on one crtc. Hence | |
902 | * drivers and helpers should only call this when really needed (e.g. when a | |
903 | * full modeset needs to happen due to some change). | |
904 | * | |
905 | * Returns: | |
906 | * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK | |
907 | * then the w/w mutex code has detected a deadlock and the entire atomic | |
908 | * sequence must be restarted. All other errors are fatal. | |
909 | */ | |
910 | int | |
911 | drm_atomic_add_affected_connectors(struct drm_atomic_state *state, | |
912 | struct drm_crtc *crtc) | |
913 | { | |
914 | struct drm_mode_config *config = &state->dev->mode_config; | |
915 | struct drm_connector *connector; | |
916 | struct drm_connector_state *conn_state; | |
613051da | 917 | struct drm_connector_list_iter conn_iter; |
5351bbdd | 918 | struct drm_crtc_state *crtc_state; |
cc4ceb48 DV |
919 | int ret; |
920 | ||
5351bbdd ML |
921 | crtc_state = drm_atomic_get_crtc_state(state, crtc); |
922 | if (IS_ERR(crtc_state)) | |
923 | return PTR_ERR(crtc_state); | |
924 | ||
cc4ceb48 DV |
925 | ret = drm_modeset_lock(&config->connection_mutex, state->acquire_ctx); |
926 | if (ret) | |
927 | return ret; | |
928 | ||
fa3ab4c2 VS |
929 | DRM_DEBUG_ATOMIC("Adding all current connectors for [CRTC:%d:%s] to %p\n", |
930 | crtc->base.id, crtc->name, state); | |
cc4ceb48 DV |
931 | |
932 | /* | |
5351bbdd ML |
933 | * Changed connectors are already in @state, so only need to look |
934 | * at the connector_mask in crtc_state. | |
cc4ceb48 | 935 | */ |
b982dab1 | 936 | drm_connector_list_iter_begin(state->dev, &conn_iter); |
613051da | 937 | drm_for_each_connector_iter(connector, &conn_iter) { |
73705732 | 938 | if (!(crtc_state->connector_mask & drm_connector_mask(connector))) |
cc4ceb48 DV |
939 | continue; |
940 | ||
941 | conn_state = drm_atomic_get_connector_state(state, connector); | |
613051da | 942 | if (IS_ERR(conn_state)) { |
b982dab1 | 943 | drm_connector_list_iter_end(&conn_iter); |
cc4ceb48 | 944 | return PTR_ERR(conn_state); |
613051da | 945 | } |
cc4ceb48 | 946 | } |
b982dab1 | 947 | drm_connector_list_iter_end(&conn_iter); |
cc4ceb48 DV |
948 | |
949 | return 0; | |
950 | } | |
951 | EXPORT_SYMBOL(drm_atomic_add_affected_connectors); | |
952 | ||
e01e9f75 ML |
953 | /** |
954 | * drm_atomic_add_affected_planes - add planes for crtc | |
955 | * @state: atomic state | |
956 | * @crtc: DRM crtc | |
957 | * | |
958 | * This function walks the current configuration and adds all planes | |
959 | * currently used by @crtc to the atomic configuration @state. This is useful | |
960 | * when an atomic commit also needs to check all currently enabled plane on | |
961 | * @crtc, e.g. when changing the mode. It's also useful when re-enabling a CRTC | |
962 | * to avoid special code to force-enable all planes. | |
963 | * | |
964 | * Since acquiring a plane state will always also acquire the w/w mutex of the | |
965 | * current CRTC for that plane (if there is any) adding all the plane states for | |
966 | * a CRTC will not reduce parallism of atomic updates. | |
967 | * | |
968 | * Returns: | |
969 | * 0 on success or can fail with -EDEADLK or -ENOMEM. When the error is EDEADLK | |
970 | * then the w/w mutex code has detected a deadlock and the entire atomic | |
971 | * sequence must be restarted. All other errors are fatal. | |
972 | */ | |
973 | int | |
974 | drm_atomic_add_affected_planes(struct drm_atomic_state *state, | |
975 | struct drm_crtc *crtc) | |
976 | { | |
534903d6 VS |
977 | const struct drm_crtc_state *old_crtc_state = |
978 | drm_atomic_get_old_crtc_state(state, crtc); | |
e01e9f75 ML |
979 | struct drm_plane *plane; |
980 | ||
b4d93679 | 981 | WARN_ON(!drm_atomic_get_new_crtc_state(state, crtc)); |
e01e9f75 | 982 | |
b6f690ab VS |
983 | DRM_DEBUG_ATOMIC("Adding all current planes for [CRTC:%d:%s] to %p\n", |
984 | crtc->base.id, crtc->name, state); | |
985 | ||
534903d6 | 986 | drm_for_each_plane_mask(plane, state->dev, old_crtc_state->plane_mask) { |
e01e9f75 ML |
987 | struct drm_plane_state *plane_state = |
988 | drm_atomic_get_plane_state(state, plane); | |
989 | ||
990 | if (IS_ERR(plane_state)) | |
991 | return PTR_ERR(plane_state); | |
992 | } | |
993 | return 0; | |
994 | } | |
995 | EXPORT_SYMBOL(drm_atomic_add_affected_planes); | |
996 | ||
cc4ceb48 DV |
997 | /** |
998 | * drm_atomic_check_only - check whether a given config would work | |
999 | * @state: atomic configuration to check | |
1000 | * | |
1001 | * Note that this function can return -EDEADLK if the driver needed to acquire | |
1002 | * more locks but encountered a deadlock. The caller must then do the usual w/w | |
1003 | * backoff dance and restart. All other errors are fatal. | |
1004 | * | |
1005 | * Returns: | |
1006 | * 0 on success, negative error code on failure. | |
1007 | */ | |
1008 | int drm_atomic_check_only(struct drm_atomic_state *state) | |
1009 | { | |
5e743737 RC |
1010 | struct drm_device *dev = state->dev; |
1011 | struct drm_mode_config *config = &dev->mode_config; | |
df63b999 | 1012 | struct drm_plane *plane; |
d9be05b7 VS |
1013 | struct drm_plane_state *old_plane_state; |
1014 | struct drm_plane_state *new_plane_state; | |
df63b999 | 1015 | struct drm_crtc *crtc; |
b2432adf VS |
1016 | struct drm_crtc_state *old_crtc_state; |
1017 | struct drm_crtc_state *new_crtc_state; | |
935774cd BS |
1018 | struct drm_connector *conn; |
1019 | struct drm_connector_state *conn_state; | |
5e743737 | 1020 | int i, ret = 0; |
cc4ceb48 | 1021 | |
17a38d9c | 1022 | DRM_DEBUG_ATOMIC("checking %p\n", state); |
cc4ceb48 | 1023 | |
d9be05b7 VS |
1024 | for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) { |
1025 | ret = drm_atomic_plane_check(old_plane_state, new_plane_state); | |
5e743737 | 1026 | if (ret) { |
9f4c97a2 VS |
1027 | DRM_DEBUG_ATOMIC("[PLANE:%d:%s] atomic core check failed\n", |
1028 | plane->base.id, plane->name); | |
5e743737 RC |
1029 | return ret; |
1030 | } | |
1031 | } | |
1032 | ||
b2432adf VS |
1033 | for_each_oldnew_crtc_in_state(state, crtc, old_crtc_state, new_crtc_state, i) { |
1034 | ret = drm_atomic_crtc_check(old_crtc_state, new_crtc_state); | |
5e743737 | 1035 | if (ret) { |
fa3ab4c2 VS |
1036 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] atomic core check failed\n", |
1037 | crtc->base.id, crtc->name); | |
5e743737 RC |
1038 | return ret; |
1039 | } | |
1040 | } | |
1041 | ||
935774cd BS |
1042 | for_each_new_connector_in_state(state, conn, conn_state, i) { |
1043 | ret = drm_atomic_connector_check(conn, conn_state); | |
1044 | if (ret) { | |
1045 | DRM_DEBUG_ATOMIC("[CONNECTOR:%d:%s] atomic core check failed\n", | |
1046 | conn->base.id, conn->name); | |
1047 | return ret; | |
1048 | } | |
1049 | } | |
1050 | ||
14d4e522 | 1051 | if (config->funcs->atomic_check) { |
5e743737 RC |
1052 | ret = config->funcs->atomic_check(state->dev, state); |
1053 | ||
14d4e522 LP |
1054 | if (ret) { |
1055 | DRM_DEBUG_ATOMIC("atomic driver check for %p failed: %d\n", | |
1056 | state, ret); | |
1057 | return ret; | |
1058 | } | |
1059 | } | |
a0ffc51e | 1060 | |
d34f20d6 | 1061 | if (!state->allow_modeset) { |
b2432adf VS |
1062 | for_each_new_crtc_in_state(state, crtc, new_crtc_state, i) { |
1063 | if (drm_atomic_crtc_needs_modeset(new_crtc_state)) { | |
fa3ab4c2 VS |
1064 | DRM_DEBUG_ATOMIC("[CRTC:%d:%s] requires full modeset\n", |
1065 | crtc->base.id, crtc->name); | |
d34f20d6 RC |
1066 | return -EINVAL; |
1067 | } | |
1068 | } | |
1069 | } | |
1070 | ||
a0ffc51e | 1071 | return 0; |
cc4ceb48 DV |
1072 | } |
1073 | EXPORT_SYMBOL(drm_atomic_check_only); | |
1074 | ||
1075 | /** | |
1076 | * drm_atomic_commit - commit configuration atomically | |
1077 | * @state: atomic configuration to check | |
1078 | * | |
1079 | * Note that this function can return -EDEADLK if the driver needed to acquire | |
1080 | * more locks but encountered a deadlock. The caller must then do the usual w/w | |
1081 | * backoff dance and restart. All other errors are fatal. | |
1082 | * | |
76fede2f ML |
1083 | * This function will take its own reference on @state. |
1084 | * Callers should always release their reference with drm_atomic_state_put(). | |
cc4ceb48 DV |
1085 | * |
1086 | * Returns: | |
1087 | * 0 on success, negative error code on failure. | |
1088 | */ | |
1089 | int drm_atomic_commit(struct drm_atomic_state *state) | |
1090 | { | |
1091 | struct drm_mode_config *config = &state->dev->mode_config; | |
1092 | int ret; | |
1093 | ||
1094 | ret = drm_atomic_check_only(state); | |
1095 | if (ret) | |
1096 | return ret; | |
1097 | ||
a0752d4a | 1098 | DRM_DEBUG_ATOMIC("committing %p\n", state); |
cc4ceb48 DV |
1099 | |
1100 | return config->funcs->atomic_commit(state->dev, state, false); | |
1101 | } | |
1102 | EXPORT_SYMBOL(drm_atomic_commit); | |
1103 | ||
1104 | /** | |
d574528a | 1105 | * drm_atomic_nonblocking_commit - atomic nonblocking commit |
cc4ceb48 DV |
1106 | * @state: atomic configuration to check |
1107 | * | |
1108 | * Note that this function can return -EDEADLK if the driver needed to acquire | |
1109 | * more locks but encountered a deadlock. The caller must then do the usual w/w | |
1110 | * backoff dance and restart. All other errors are fatal. | |
1111 | * | |
76fede2f ML |
1112 | * This function will take its own reference on @state. |
1113 | * Callers should always release their reference with drm_atomic_state_put(). | |
cc4ceb48 DV |
1114 | * |
1115 | * Returns: | |
1116 | * 0 on success, negative error code on failure. | |
1117 | */ | |
b837ba0a | 1118 | int drm_atomic_nonblocking_commit(struct drm_atomic_state *state) |
cc4ceb48 DV |
1119 | { |
1120 | struct drm_mode_config *config = &state->dev->mode_config; | |
1121 | int ret; | |
1122 | ||
1123 | ret = drm_atomic_check_only(state); | |
1124 | if (ret) | |
1125 | return ret; | |
1126 | ||
a0752d4a | 1127 | DRM_DEBUG_ATOMIC("committing %p nonblocking\n", state); |
cc4ceb48 DV |
1128 | |
1129 | return config->funcs->atomic_commit(state->dev, state, true); | |
1130 | } | |
b837ba0a | 1131 | EXPORT_SYMBOL(drm_atomic_nonblocking_commit); |
d34f20d6 | 1132 | |
72fdb40c | 1133 | void drm_atomic_print_state(const struct drm_atomic_state *state) |
fceffb32 RC |
1134 | { |
1135 | struct drm_printer p = drm_info_printer(state->dev->dev); | |
1136 | struct drm_plane *plane; | |
1137 | struct drm_plane_state *plane_state; | |
1138 | struct drm_crtc *crtc; | |
1139 | struct drm_crtc_state *crtc_state; | |
1140 | struct drm_connector *connector; | |
1141 | struct drm_connector_state *connector_state; | |
1142 | int i; | |
1143 | ||
1144 | DRM_DEBUG_ATOMIC("checking %p\n", state); | |
1145 | ||
5721a380 | 1146 | for_each_new_plane_in_state(state, plane, plane_state, i) |
fceffb32 RC |
1147 | drm_atomic_plane_print_state(&p, plane_state); |
1148 | ||
5721a380 | 1149 | for_each_new_crtc_in_state(state, crtc, crtc_state, i) |
fceffb32 RC |
1150 | drm_atomic_crtc_print_state(&p, crtc_state); |
1151 | ||
5721a380 | 1152 | for_each_new_connector_in_state(state, connector, connector_state, i) |
fceffb32 RC |
1153 | drm_atomic_connector_print_state(&p, connector_state); |
1154 | } | |
1155 | ||
c2d85564 DV |
1156 | static void __drm_state_dump(struct drm_device *dev, struct drm_printer *p, |
1157 | bool take_locks) | |
6559c901 RC |
1158 | { |
1159 | struct drm_mode_config *config = &dev->mode_config; | |
1160 | struct drm_plane *plane; | |
1161 | struct drm_crtc *crtc; | |
1162 | struct drm_connector *connector; | |
613051da | 1163 | struct drm_connector_list_iter conn_iter; |
6559c901 | 1164 | |
3c499ea0 | 1165 | if (!drm_drv_uses_atomic_modeset(dev)) |
6559c901 RC |
1166 | return; |
1167 | ||
c2d85564 DV |
1168 | list_for_each_entry(plane, &config->plane_list, head) { |
1169 | if (take_locks) | |
1170 | drm_modeset_lock(&plane->mutex, NULL); | |
6559c901 | 1171 | drm_atomic_plane_print_state(p, plane->state); |
c2d85564 DV |
1172 | if (take_locks) |
1173 | drm_modeset_unlock(&plane->mutex); | |
1174 | } | |
6559c901 | 1175 | |
c2d85564 DV |
1176 | list_for_each_entry(crtc, &config->crtc_list, head) { |
1177 | if (take_locks) | |
1178 | drm_modeset_lock(&crtc->mutex, NULL); | |
6559c901 | 1179 | drm_atomic_crtc_print_state(p, crtc->state); |
c2d85564 DV |
1180 | if (take_locks) |
1181 | drm_modeset_unlock(&crtc->mutex); | |
1182 | } | |
6559c901 | 1183 | |
b982dab1 | 1184 | drm_connector_list_iter_begin(dev, &conn_iter); |
c2d85564 DV |
1185 | if (take_locks) |
1186 | drm_modeset_lock(&dev->mode_config.connection_mutex, NULL); | |
613051da | 1187 | drm_for_each_connector_iter(connector, &conn_iter) |
6559c901 | 1188 | drm_atomic_connector_print_state(p, connector->state); |
c2d85564 DV |
1189 | if (take_locks) |
1190 | drm_modeset_unlock(&dev->mode_config.connection_mutex); | |
b982dab1 | 1191 | drm_connector_list_iter_end(&conn_iter); |
6559c901 | 1192 | } |
c2d85564 DV |
1193 | |
1194 | /** | |
1195 | * drm_state_dump - dump entire device atomic state | |
1196 | * @dev: the drm device | |
1197 | * @p: where to print the state to | |
1198 | * | |
1199 | * Just for debugging. Drivers might want an option to dump state | |
1200 | * to dmesg in case of error irq's. (Hint, you probably want to | |
1201 | * ratelimit this!) | |
1202 | * | |
1203 | * The caller must drm_modeset_lock_all(), or if this is called | |
1204 | * from error irq handler, it should not be enabled by default. | |
1205 | * (Ie. if you are debugging errors you might not care that this | |
1206 | * is racey. But calling this without all modeset locks held is | |
1207 | * not inherently safe.) | |
1208 | */ | |
1209 | void drm_state_dump(struct drm_device *dev, struct drm_printer *p) | |
1210 | { | |
1211 | __drm_state_dump(dev, p, false); | |
1212 | } | |
6559c901 RC |
1213 | EXPORT_SYMBOL(drm_state_dump); |
1214 | ||
1215 | #ifdef CONFIG_DEBUG_FS | |
1216 | static int drm_state_info(struct seq_file *m, void *data) | |
1217 | { | |
1218 | struct drm_info_node *node = (struct drm_info_node *) m->private; | |
1219 | struct drm_device *dev = node->minor->dev; | |
1220 | struct drm_printer p = drm_seq_file_printer(m); | |
1221 | ||
c2d85564 | 1222 | __drm_state_dump(dev, &p, true); |
6559c901 RC |
1223 | |
1224 | return 0; | |
1225 | } | |
1226 | ||
1227 | /* any use in debugfs files to dump individual planes/crtc/etc? */ | |
1228 | static const struct drm_info_list drm_atomic_debugfs_list[] = { | |
1229 | {"state", drm_state_info, 0}, | |
1230 | }; | |
1231 | ||
1232 | int drm_atomic_debugfs_init(struct drm_minor *minor) | |
1233 | { | |
1234 | return drm_debugfs_create_files(drm_atomic_debugfs_list, | |
1235 | ARRAY_SIZE(drm_atomic_debugfs_list), | |
1236 | minor->debugfs_root, minor); | |
1237 | } | |
1238 | #endif | |
1239 |