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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 | #ifndef DRM_ATOMIC_H_ | |
29 | #define DRM_ATOMIC_H_ | |
30 | ||
37cc0148 TR |
31 | #include <drm/drm_crtc.h> |
32 | ||
43968d7b DV |
33 | /** |
34 | * struct drm_crtc_commit - track modeset commits on a CRTC | |
35 | * | |
36 | * This structure is used to track pending modeset changes and atomic commit on | |
37 | * a per-CRTC basis. Since updating the list should never block this structure | |
38 | * is reference counted to allow waiters to safely wait on an event to complete, | |
39 | * without holding any locks. | |
40 | * | |
41 | * It has 3 different events in total to allow a fine-grained synchronization | |
42 | * between outstanding updates:: | |
43 | * | |
44 | * atomic commit thread hardware | |
45 | * | |
46 | * write new state into hardware ----> ... | |
47 | * signal hw_done | |
48 | * switch to new state on next | |
49 | * ... v/hblank | |
50 | * | |
51 | * wait for buffers to show up ... | |
52 | * | |
53 | * ... send completion irq | |
54 | * irq handler signals flip_done | |
55 | * cleanup old buffers | |
56 | * | |
57 | * signal cleanup_done | |
58 | * | |
59 | * wait for flip_done <---- | |
60 | * clean up atomic state | |
61 | * | |
62 | * The important bit to know is that cleanup_done is the terminal event, but the | |
63 | * ordering between flip_done and hw_done is entirely up to the specific driver | |
64 | * and modeset state change. | |
65 | * | |
66 | * For an implementation of how to use this look at | |
67 | * drm_atomic_helper_setup_commit() from the atomic helper library. | |
68 | */ | |
69 | struct drm_crtc_commit { | |
70 | /** | |
71 | * @crtc: | |
72 | * | |
73 | * DRM CRTC for this commit. | |
74 | */ | |
75 | struct drm_crtc *crtc; | |
76 | ||
77 | /** | |
78 | * @ref: | |
79 | * | |
80 | * Reference count for this structure. Needed to allow blocking on | |
81 | * completions without the risk of the completion disappearing | |
82 | * meanwhile. | |
83 | */ | |
84 | struct kref ref; | |
85 | ||
86 | /** | |
87 | * @flip_done: | |
88 | * | |
89 | * Will be signaled when the hardware has flipped to the new set of | |
90 | * buffers. Signals at the same time as when the drm event for this | |
91 | * commit is sent to userspace, or when an out-fence is singalled. Note | |
92 | * that for most hardware, in most cases this happens after @hw_done is | |
93 | * signalled. | |
94 | */ | |
95 | struct completion flip_done; | |
96 | ||
97 | /** | |
98 | * @hw_done: | |
99 | * | |
100 | * Will be signalled when all hw register changes for this commit have | |
101 | * been written out. Especially when disabling a pipe this can be much | |
102 | * later than than @flip_done, since that can signal already when the | |
103 | * screen goes black, whereas to fully shut down a pipe more register | |
104 | * I/O is required. | |
105 | * | |
106 | * Note that this does not need to include separately reference-counted | |
107 | * resources like backing storage buffer pinning, or runtime pm | |
108 | * management. | |
109 | */ | |
110 | struct completion hw_done; | |
111 | ||
112 | /** | |
113 | * @cleanup_done: | |
114 | * | |
115 | * Will be signalled after old buffers have been cleaned up by calling | |
116 | * drm_atomic_helper_cleanup_planes(). Since this can only happen after | |
117 | * a vblank wait completed it might be a bit later. This completion is | |
118 | * useful to throttle updates and avoid hardware updates getting ahead | |
119 | * of the buffer cleanup too much. | |
120 | */ | |
121 | struct completion cleanup_done; | |
122 | ||
123 | /** | |
124 | * @commit_entry: | |
125 | * | |
d574528a DV |
126 | * Entry on the per-CRTC &drm_crtc.commit_list. Protected by |
127 | * $drm_crtc.commit_lock. | |
43968d7b DV |
128 | */ |
129 | struct list_head commit_entry; | |
130 | ||
131 | /** | |
132 | * @event: | |
133 | * | |
134 | * &drm_pending_vblank_event pointer to clean up private events. | |
135 | */ | |
136 | struct drm_pending_vblank_event *event; | |
137 | }; | |
138 | ||
139 | struct __drm_planes_state { | |
140 | struct drm_plane *ptr; | |
141 | struct drm_plane_state *state; | |
142 | }; | |
143 | ||
144 | struct __drm_crtcs_state { | |
145 | struct drm_crtc *ptr; | |
146 | struct drm_crtc_state *state; | |
147 | struct drm_crtc_commit *commit; | |
7e9081c5 | 148 | s32 __user *out_fence_ptr; |
bdc57146 | 149 | unsigned last_vblank_count; |
43968d7b DV |
150 | }; |
151 | ||
152 | struct __drm_connnectors_state { | |
153 | struct drm_connector *ptr; | |
154 | struct drm_connector_state *state; | |
155 | }; | |
156 | ||
157 | /** | |
158 | * struct drm_atomic_state - the global state object for atomic updates | |
0853695c | 159 | * @ref: count of all references to this state (will not be freed until zero) |
43968d7b DV |
160 | * @dev: parent DRM device |
161 | * @allow_modeset: allow full modeset | |
162 | * @legacy_cursor_update: hint to enforce legacy cursor IOCTL semantics | |
163 | * @legacy_set_config: Disable conflicting encoders instead of failing with -EINVAL. | |
164 | * @planes: pointer to array of structures with per-plane data | |
165 | * @crtcs: pointer to array of CRTC pointers | |
166 | * @num_connector: size of the @connectors and @connector_states arrays | |
167 | * @connectors: pointer to array of structures with per-connector data | |
168 | * @acquire_ctx: acquire context for this atomic modeset state update | |
169 | */ | |
170 | struct drm_atomic_state { | |
0853695c CW |
171 | struct kref ref; |
172 | ||
43968d7b DV |
173 | struct drm_device *dev; |
174 | bool allow_modeset : 1; | |
175 | bool legacy_cursor_update : 1; | |
176 | bool legacy_set_config : 1; | |
177 | struct __drm_planes_state *planes; | |
178 | struct __drm_crtcs_state *crtcs; | |
179 | int num_connector; | |
180 | struct __drm_connnectors_state *connectors; | |
181 | ||
182 | struct drm_modeset_acquire_ctx *acquire_ctx; | |
183 | ||
184 | /** | |
185 | * @commit_work: | |
186 | * | |
187 | * Work item which can be used by the driver or helpers to execute the | |
188 | * commit without blocking. | |
189 | */ | |
190 | struct work_struct commit_work; | |
191 | }; | |
192 | ||
b3ba3f6f DV |
193 | void __drm_crtc_commit_free(struct kref *kref); |
194 | ||
195 | /** | |
196 | * drm_crtc_commit_get - acquire a reference to the CRTC commit | |
197 | * @commit: CRTC commit | |
198 | * | |
199 | * Increases the reference of @commit. | |
200 | */ | |
3b24f7d6 DV |
201 | static inline void drm_crtc_commit_get(struct drm_crtc_commit *commit) |
202 | { | |
203 | kref_get(&commit->ref); | |
204 | } | |
205 | ||
b3ba3f6f DV |
206 | /** |
207 | * drm_crtc_commit_put - release a reference to the CRTC commmit | |
208 | * @commit: CRTC commit | |
209 | * | |
210 | * This releases a reference to @commit which is freed after removing the | |
211 | * final reference. No locking required and callable from any context. | |
212 | */ | |
213 | static inline void drm_crtc_commit_put(struct drm_crtc_commit *commit) | |
214 | { | |
215 | kref_put(&commit->ref, __drm_crtc_commit_free); | |
216 | } | |
217 | ||
cc4ceb48 DV |
218 | struct drm_atomic_state * __must_check |
219 | drm_atomic_state_alloc(struct drm_device *dev); | |
220 | void drm_atomic_state_clear(struct drm_atomic_state *state); | |
0853695c CW |
221 | |
222 | /** | |
223 | * drm_atomic_state_get - acquire a reference to the atomic state | |
224 | * @state: The atomic state | |
225 | * | |
226 | * Returns a new reference to the @state | |
227 | */ | |
228 | static inline struct drm_atomic_state * | |
229 | drm_atomic_state_get(struct drm_atomic_state *state) | |
230 | { | |
231 | kref_get(&state->ref); | |
232 | return state; | |
233 | } | |
234 | ||
235 | void __drm_atomic_state_free(struct kref *ref); | |
236 | ||
237 | /** | |
238 | * drm_atomic_state_put - release a reference to the atomic state | |
239 | * @state: The atomic state | |
240 | * | |
241 | * This releases a reference to @state which is freed after removing the | |
242 | * final reference. No locking required and callable from any context. | |
243 | */ | |
244 | static inline void drm_atomic_state_put(struct drm_atomic_state *state) | |
245 | { | |
246 | kref_put(&state->ref, __drm_atomic_state_free); | |
247 | } | |
036ef573 ML |
248 | |
249 | int __must_check | |
250 | drm_atomic_state_init(struct drm_device *dev, struct drm_atomic_state *state); | |
251 | void drm_atomic_state_default_clear(struct drm_atomic_state *state); | |
252 | void drm_atomic_state_default_release(struct drm_atomic_state *state); | |
cc4ceb48 DV |
253 | |
254 | struct drm_crtc_state * __must_check | |
255 | drm_atomic_get_crtc_state(struct drm_atomic_state *state, | |
256 | struct drm_crtc *crtc); | |
40ecc694 RC |
257 | int drm_atomic_crtc_set_property(struct drm_crtc *crtc, |
258 | struct drm_crtc_state *state, struct drm_property *property, | |
259 | uint64_t val); | |
cc4ceb48 DV |
260 | struct drm_plane_state * __must_check |
261 | drm_atomic_get_plane_state(struct drm_atomic_state *state, | |
262 | struct drm_plane *plane); | |
40ecc694 RC |
263 | int drm_atomic_plane_set_property(struct drm_plane *plane, |
264 | struct drm_plane_state *state, struct drm_property *property, | |
265 | uint64_t val); | |
cc4ceb48 DV |
266 | struct drm_connector_state * __must_check |
267 | drm_atomic_get_connector_state(struct drm_atomic_state *state, | |
268 | struct drm_connector *connector); | |
40ecc694 RC |
269 | int drm_atomic_connector_set_property(struct drm_connector *connector, |
270 | struct drm_connector_state *state, struct drm_property *property, | |
271 | uint64_t val); | |
88a48e29 | 272 | |
1b26a5e1 ML |
273 | /** |
274 | * drm_atomic_get_existing_crtc_state - get crtc state, if it exists | |
275 | * @state: global atomic state object | |
276 | * @crtc: crtc to grab | |
277 | * | |
278 | * This function returns the crtc state for the given crtc, or NULL | |
279 | * if the crtc is not part of the global atomic state. | |
280 | */ | |
281 | static inline struct drm_crtc_state * | |
282 | drm_atomic_get_existing_crtc_state(struct drm_atomic_state *state, | |
283 | struct drm_crtc *crtc) | |
284 | { | |
5d943aa6 | 285 | return state->crtcs[drm_crtc_index(crtc)].state; |
1b26a5e1 ML |
286 | } |
287 | ||
288 | /** | |
289 | * drm_atomic_get_existing_plane_state - get plane state, if it exists | |
290 | * @state: global atomic state object | |
291 | * @plane: plane to grab | |
292 | * | |
293 | * This function returns the plane state for the given plane, or NULL | |
294 | * if the plane is not part of the global atomic state. | |
295 | */ | |
296 | static inline struct drm_plane_state * | |
297 | drm_atomic_get_existing_plane_state(struct drm_atomic_state *state, | |
298 | struct drm_plane *plane) | |
299 | { | |
b8b5342b | 300 | return state->planes[drm_plane_index(plane)].state; |
1b26a5e1 ML |
301 | } |
302 | ||
303 | /** | |
304 | * drm_atomic_get_existing_connector_state - get connector state, if it exists | |
305 | * @state: global atomic state object | |
306 | * @connector: connector to grab | |
307 | * | |
308 | * This function returns the connector state for the given connector, | |
309 | * or NULL if the connector is not part of the global atomic state. | |
310 | */ | |
311 | static inline struct drm_connector_state * | |
312 | drm_atomic_get_existing_connector_state(struct drm_atomic_state *state, | |
313 | struct drm_connector *connector) | |
314 | { | |
315 | int index = drm_connector_index(connector); | |
316 | ||
317 | if (index >= state->num_connector) | |
318 | return NULL; | |
319 | ||
63e83c1d | 320 | return state->connectors[index].state; |
1b26a5e1 ML |
321 | } |
322 | ||
2f196b7c DV |
323 | /** |
324 | * __drm_atomic_get_current_plane_state - get current plane state | |
325 | * @state: global atomic state object | |
326 | * @plane: plane to grab | |
327 | * | |
328 | * This function returns the plane state for the given plane, either from | |
329 | * @state, or if the plane isn't part of the atomic state update, from @plane. | |
330 | * This is useful in atomic check callbacks, when drivers need to peek at, but | |
331 | * not change, state of other planes, since it avoids threading an error code | |
332 | * back up the call chain. | |
333 | * | |
334 | * WARNING: | |
335 | * | |
336 | * Note that this function is in general unsafe since it doesn't check for the | |
337 | * required locking for access state structures. Drivers must ensure that it is | |
60c9e190 | 338 | * safe to access the returned state structure through other means. One common |
2f196b7c | 339 | * example is when planes are fixed to a single CRTC, and the driver knows that |
60c9e190 | 340 | * the CRTC lock is held already. In that case holding the CRTC lock gives a |
2f196b7c DV |
341 | * read-lock on all planes connected to that CRTC. But if planes can be |
342 | * reassigned things get more tricky. In that case it's better to use | |
343 | * drm_atomic_get_plane_state and wire up full error handling. | |
344 | * | |
345 | * Returns: | |
346 | * | |
347 | * Read-only pointer to the current plane state. | |
348 | */ | |
349 | static inline const struct drm_plane_state * | |
350 | __drm_atomic_get_current_plane_state(struct drm_atomic_state *state, | |
351 | struct drm_plane *plane) | |
352 | { | |
b8b5342b DV |
353 | if (state->planes[drm_plane_index(plane)].state) |
354 | return state->planes[drm_plane_index(plane)].state; | |
2f196b7c DV |
355 | |
356 | return plane->state; | |
357 | } | |
358 | ||
819364da DS |
359 | int __must_check |
360 | drm_atomic_set_mode_for_crtc(struct drm_crtc_state *state, | |
361 | struct drm_display_mode *mode); | |
cc4ceb48 | 362 | int __must_check |
955f3c33 DS |
363 | drm_atomic_set_mode_prop_for_crtc(struct drm_crtc_state *state, |
364 | struct drm_property_blob *blob); | |
365 | int __must_check | |
07cc0ef6 DV |
366 | drm_atomic_set_crtc_for_plane(struct drm_plane_state *plane_state, |
367 | struct drm_crtc *crtc); | |
321ebf04 DV |
368 | void drm_atomic_set_fb_for_plane(struct drm_plane_state *plane_state, |
369 | struct drm_framebuffer *fb); | |
13b55664 GP |
370 | void drm_atomic_set_fence_for_plane(struct drm_plane_state *plane_state, |
371 | struct dma_fence *fence); | |
cc4ceb48 DV |
372 | int __must_check |
373 | drm_atomic_set_crtc_for_connector(struct drm_connector_state *conn_state, | |
374 | struct drm_crtc *crtc); | |
375 | int __must_check | |
376 | drm_atomic_add_affected_connectors(struct drm_atomic_state *state, | |
377 | struct drm_crtc *crtc); | |
e01e9f75 ML |
378 | int __must_check |
379 | drm_atomic_add_affected_planes(struct drm_atomic_state *state, | |
380 | struct drm_crtc *crtc); | |
381 | ||
cc4ceb48 DV |
382 | void drm_atomic_legacy_backoff(struct drm_atomic_state *state); |
383 | ||
0f45c26f ML |
384 | void |
385 | drm_atomic_clean_old_fb(struct drm_device *dev, unsigned plane_mask, int ret); | |
386 | ||
cc4ceb48 DV |
387 | int __must_check drm_atomic_check_only(struct drm_atomic_state *state); |
388 | int __must_check drm_atomic_commit(struct drm_atomic_state *state); | |
b837ba0a | 389 | int __must_check drm_atomic_nonblocking_commit(struct drm_atomic_state *state); |
cc4ceb48 | 390 | |
6559c901 RC |
391 | void drm_state_dump(struct drm_device *dev, struct drm_printer *p); |
392 | ||
63e83c1d | 393 | #define for_each_connector_in_state(__state, connector, connector_state, __i) \ |
df63b999 | 394 | for ((__i) = 0; \ |
63e83c1d DV |
395 | (__i) < (__state)->num_connector && \ |
396 | ((connector) = (__state)->connectors[__i].ptr, \ | |
397 | (connector_state) = (__state)->connectors[__i].state, 1); \ | |
df63b999 | 398 | (__i)++) \ |
373701b1 | 399 | for_each_if (connector) |
df63b999 | 400 | |
5d943aa6 | 401 | #define for_each_crtc_in_state(__state, crtc, crtc_state, __i) \ |
df63b999 | 402 | for ((__i) = 0; \ |
5d943aa6 DV |
403 | (__i) < (__state)->dev->mode_config.num_crtc && \ |
404 | ((crtc) = (__state)->crtcs[__i].ptr, \ | |
405 | (crtc_state) = (__state)->crtcs[__i].state, 1); \ | |
df63b999 | 406 | (__i)++) \ |
373701b1 | 407 | for_each_if (crtc_state) |
df63b999 | 408 | |
b8b5342b | 409 | #define for_each_plane_in_state(__state, plane, plane_state, __i) \ |
60f207a5 | 410 | for ((__i) = 0; \ |
b8b5342b DV |
411 | (__i) < (__state)->dev->mode_config.num_total_plane && \ |
412 | ((plane) = (__state)->planes[__i].ptr, \ | |
413 | (plane_state) = (__state)->planes[__i].state, 1); \ | |
60f207a5 | 414 | (__i)++) \ |
373701b1 | 415 | for_each_if (plane_state) |
081e9c0f DV |
416 | |
417 | /** | |
418 | * drm_atomic_crtc_needs_modeset - compute combined modeset need | |
419 | * @state: &drm_crtc_state for the CRTC | |
420 | * | |
ea0dd85a | 421 | * To give drivers flexibility &struct drm_crtc_state has 3 booleans to track |
081e9c0f | 422 | * whether the state CRTC changed enough to need a full modeset cycle: |
d807ed1c | 423 | * connectors_changed, mode_changed and active_changed. This helper simply |
081e9c0f | 424 | * combines these three to compute the overall need for a modeset for @state. |
d807ed1c BS |
425 | * |
426 | * The atomic helper code sets these booleans, but drivers can and should | |
427 | * change them appropriately to accurately represent whether a modeset is | |
428 | * really needed. In general, drivers should avoid full modesets whenever | |
429 | * possible. | |
430 | * | |
431 | * For example if the CRTC mode has changed, and the hardware is able to enact | |
432 | * the requested mode change without going through a full modeset, the driver | |
d574528a DV |
433 | * should clear mode_changed in its &drm_mode_config_funcs.atomic_check |
434 | * implementation. | |
081e9c0f | 435 | */ |
2465ff62 | 436 | static inline bool |
79b95552 | 437 | drm_atomic_crtc_needs_modeset(const struct drm_crtc_state *state) |
2465ff62 | 438 | { |
fc596660 ML |
439 | return state->mode_changed || state->active_changed || |
440 | state->connectors_changed; | |
2465ff62 DV |
441 | } |
442 | ||
cc4ceb48 | 443 | #endif /* DRM_ATOMIC_H_ */ |