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TOMOYO Linux Cross Reference
Linux/include/drm/drm_atomic_helper.h

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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 #ifndef DRM_ATOMIC_HELPER_H_
 29 #define DRM_ATOMIC_HELPER_H_
 30 
 31 #include <drm/drm_crtc.h>
 32 #include <drm/drm_modeset_helper_vtables.h>
 33 #include <drm/drm_modeset_helper.h>
 34 #include <drm/drm_atomic_state_helper.h>
 35 #include <drm/drm_util.h>
 36 
 37 struct drm_atomic_state;
 38 struct drm_private_obj;
 39 struct drm_private_state;
 40 
 41 int drm_atomic_helper_check_modeset(struct drm_device *dev,
 42                                 struct drm_atomic_state *state);
 43 int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state,
 44                                         const struct drm_crtc_state *crtc_state,
 45                                         int min_scale,
 46                                         int max_scale,
 47                                         bool can_position,
 48                                         bool can_update_disabled);
 49 int drm_atomic_helper_check_planes(struct drm_device *dev,
 50                                struct drm_atomic_state *state);
 51 int drm_atomic_helper_check(struct drm_device *dev,
 52                             struct drm_atomic_state *state);
 53 void drm_atomic_helper_commit_tail(struct drm_atomic_state *state);
 54 void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_state *state);
 55 int drm_atomic_helper_commit(struct drm_device *dev,
 56                              struct drm_atomic_state *state,
 57                              bool nonblock);
 58 int drm_atomic_helper_async_check(struct drm_device *dev,
 59                                   struct drm_atomic_state *state);
 60 void drm_atomic_helper_async_commit(struct drm_device *dev,
 61                                     struct drm_atomic_state *state);
 62 
 63 int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
 64                                         struct drm_atomic_state *state,
 65                                         bool pre_swap);
 66 
 67 void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
 68                                         struct drm_atomic_state *old_state);
 69 
 70 void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev,
 71                                           struct drm_atomic_state *old_state);
 72 
 73 void
 74 drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
 75                                               struct drm_atomic_state *old_state);
 76 
 77 void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
 78                                                struct drm_atomic_state *state);
 79 void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
 80                                           struct drm_atomic_state *old_state);
 81 
 82 int drm_atomic_helper_prepare_planes(struct drm_device *dev,
 83                                      struct drm_atomic_state *state);
 84 
 85 #define DRM_PLANE_COMMIT_ACTIVE_ONLY                    BIT(0)
 86 #define DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET       BIT(1)
 87 
 88 void drm_atomic_helper_commit_planes(struct drm_device *dev,
 89                                      struct drm_atomic_state *state,
 90                                      uint32_t flags);
 91 void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
 92                                       struct drm_atomic_state *old_state);
 93 void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
 94 void
 95 drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state,
 96                                          bool atomic);
 97 
 98 int __must_check drm_atomic_helper_swap_state(struct drm_atomic_state *state,
 99                                               bool stall);
100 
101 /* nonblocking commit helpers */
102 int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
103                                    bool nonblock);
104 void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *state);
105 void drm_atomic_helper_fake_vblank(struct drm_atomic_state *state);
106 void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *state);
107 void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *state);
108 
109 /* implementations for legacy interfaces */
110 int drm_atomic_helper_update_plane(struct drm_plane *plane,
111                                    struct drm_crtc *crtc,
112                                    struct drm_framebuffer *fb,
113                                    int crtc_x, int crtc_y,
114                                    unsigned int crtc_w, unsigned int crtc_h,
115                                    uint32_t src_x, uint32_t src_y,
116                                    uint32_t src_w, uint32_t src_h,
117                                    struct drm_modeset_acquire_ctx *ctx);
118 int drm_atomic_helper_disable_plane(struct drm_plane *plane,
119                                     struct drm_modeset_acquire_ctx *ctx);
120 int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
121                 struct drm_plane_state *plane_state);
122 int drm_atomic_helper_set_config(struct drm_mode_set *set,
123                                  struct drm_modeset_acquire_ctx *ctx);
124 int __drm_atomic_helper_set_config(struct drm_mode_set *set,
125                 struct drm_atomic_state *state);
126 
127 int drm_atomic_helper_disable_all(struct drm_device *dev,
128                                   struct drm_modeset_acquire_ctx *ctx);
129 void drm_atomic_helper_shutdown(struct drm_device *dev);
130 struct drm_atomic_state *
131 drm_atomic_helper_duplicate_state(struct drm_device *dev,
132                                   struct drm_modeset_acquire_ctx *ctx);
133 struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev);
134 int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state,
135                                               struct drm_modeset_acquire_ctx *ctx);
136 int drm_atomic_helper_resume(struct drm_device *dev,
137                              struct drm_atomic_state *state);
138 
139 int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
140                                 struct drm_framebuffer *fb,
141                                 struct drm_pending_vblank_event *event,
142                                 uint32_t flags,
143                                 struct drm_modeset_acquire_ctx *ctx);
144 int drm_atomic_helper_page_flip_target(
145                                 struct drm_crtc *crtc,
146                                 struct drm_framebuffer *fb,
147                                 struct drm_pending_vblank_event *event,
148                                 uint32_t flags,
149                                 uint32_t target,
150                                 struct drm_modeset_acquire_ctx *ctx);
151 int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
152                                        u16 *red, u16 *green, u16 *blue,
153                                        uint32_t size,
154                                        struct drm_modeset_acquire_ctx *ctx);
155 
156 /**
157  * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
158  * @plane: the loop cursor
159  * @crtc:  the crtc whose planes are iterated
160  *
161  * This iterates over the current state, useful (for example) when applying
162  * atomic state after it has been checked and swapped.  To iterate over the
163  * planes which *will* be attached (more useful in code called from
164  * &drm_mode_config_funcs.atomic_check) see
165  * drm_atomic_crtc_state_for_each_plane().
166  */
167 #define drm_atomic_crtc_for_each_plane(plane, crtc) \
168         drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
169 
170 /**
171  * drm_crtc_atomic_state_for_each_plane - iterate over attached planes in new state
172  * @plane: the loop cursor
173  * @crtc_state: the incoming crtc-state
174  *
175  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
176  * attached if the specified state is applied.  Useful during for example
177  * in code called from &drm_mode_config_funcs.atomic_check operations, to
178  * validate the incoming state.
179  */
180 #define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
181         drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
182 
183 /**
184  * drm_crtc_atomic_state_for_each_plane_state - iterate over attached planes in new state
185  * @plane: the loop cursor
186  * @plane_state: loop cursor for the plane's state, must be const
187  * @crtc_state: the incoming crtc-state
188  *
189  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
190  * attached if the specified state is applied.  Useful during for example
191  * in code called from &drm_mode_config_funcs.atomic_check operations, to
192  * validate the incoming state.
193  *
194  * Compared to just drm_atomic_crtc_state_for_each_plane() this also fills in a
195  * const plane_state. This is useful when a driver just wants to peek at other
196  * active planes on this crtc, but does not need to change it.
197  */
198 #define drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) \
199         drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask) \
200                 for_each_if ((plane_state = \
201                               __drm_atomic_get_current_plane_state((crtc_state)->state, \
202                                                                    plane)))
203 
204 /**
205  * drm_atomic_plane_disabling - check whether a plane is being disabled
206  * @old_plane_state: old atomic plane state
207  * @new_plane_state: new atomic plane state
208  *
209  * Checks the atomic state of a plane to determine whether it's being disabled
210  * or not. This also WARNs if it detects an invalid state (both CRTC and FB
211  * need to either both be NULL or both be non-NULL).
212  *
213  * RETURNS:
214  * True if the plane is being disabled, false otherwise.
215  */
216 static inline bool
217 drm_atomic_plane_disabling(struct drm_plane_state *old_plane_state,
218                            struct drm_plane_state *new_plane_state)
219 {
220         /*
221          * When disabling a plane, CRTC and FB should always be NULL together.
222          * Anything else should be considered a bug in the atomic core, so we
223          * gently warn about it.
224          */
225         WARN_ON((new_plane_state->crtc == NULL && new_plane_state->fb != NULL) ||
226                 (new_plane_state->crtc != NULL && new_plane_state->fb == NULL));
227 
228         return old_plane_state->crtc && !new_plane_state->crtc;
229 }
230 
231 #endif /* DRM_ATOMIC_HELPER_H_ */
232 

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