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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 
 33 int drm_atomic_helper_check_modeset(struct drm_device *dev,
 34                                 struct drm_atomic_state *state);
 35 int drm_atomic_helper_check_planes(struct drm_device *dev,
 36                                struct drm_atomic_state *state);
 37 int drm_atomic_helper_check(struct drm_device *dev,
 38                             struct drm_atomic_state *state);
 39 int drm_atomic_helper_commit(struct drm_device *dev,
 40                              struct drm_atomic_state *state,
 41                              bool async);
 42 
 43 void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
 44                                         struct drm_atomic_state *old_state);
 45 
 46 void
 47 drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
 48                                               struct drm_atomic_state *old_state);
 49 
 50 void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
 51                                                struct drm_atomic_state *state);
 52 void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
 53                                           struct drm_atomic_state *old_state);
 54 
 55 int drm_atomic_helper_prepare_planes(struct drm_device *dev,
 56                                      struct drm_atomic_state *state);
 57 void drm_atomic_helper_commit_planes(struct drm_device *dev,
 58                                      struct drm_atomic_state *state);
 59 void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
 60                                       struct drm_atomic_state *old_state);
 61 void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
 62 
 63 void drm_atomic_helper_swap_state(struct drm_device *dev,
 64                                   struct drm_atomic_state *state);
 65 
 66 /* implementations for legacy interfaces */
 67 int drm_atomic_helper_update_plane(struct drm_plane *plane,
 68                                    struct drm_crtc *crtc,
 69                                    struct drm_framebuffer *fb,
 70                                    int crtc_x, int crtc_y,
 71                                    unsigned int crtc_w, unsigned int crtc_h,
 72                                    uint32_t src_x, uint32_t src_y,
 73                                    uint32_t src_w, uint32_t src_h);
 74 int drm_atomic_helper_disable_plane(struct drm_plane *plane);
 75 int drm_atomic_helper_set_config(struct drm_mode_set *set);
 76 
 77 int drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc,
 78                                         struct drm_property *property,
 79                                         uint64_t val);
 80 int drm_atomic_helper_plane_set_property(struct drm_plane *plane,
 81                                         struct drm_property *property,
 82                                         uint64_t val);
 83 int drm_atomic_helper_connector_set_property(struct drm_connector *connector,
 84                                         struct drm_property *property,
 85                                         uint64_t val);
 86 int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
 87                                 struct drm_framebuffer *fb,
 88                                 struct drm_pending_vblank_event *event,
 89                                 uint32_t flags);
 90 int drm_atomic_helper_connector_dpms(struct drm_connector *connector,
 91                                      int mode);
 92 
 93 /* default implementations for state handling */
 94 void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
 95 void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
 96                                               struct drm_crtc_state *state);
 97 struct drm_crtc_state *
 98 drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc);
 99 void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
100                                             struct drm_crtc_state *state);
101 void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
102                                           struct drm_crtc_state *state);
103 
104 void drm_atomic_helper_plane_reset(struct drm_plane *plane);
105 void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
106                                                struct drm_plane_state *state);
107 struct drm_plane_state *
108 drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane);
109 void __drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
110                                              struct drm_plane_state *state);
111 void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
112                                           struct drm_plane_state *state);
113 
114 void drm_atomic_helper_connector_reset(struct drm_connector *connector);
115 void
116 __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
117                                            struct drm_connector_state *state);
118 struct drm_connector_state *
119 drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector);
120 void
121 __drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
122                                             struct drm_connector_state *state);
123 void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
124                                           struct drm_connector_state *state);
125 
126 /**
127  * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
128  * @plane: the loop cursor
129  * @crtc:  the crtc whose planes are iterated
130  *
131  * This iterates over the current state, useful (for example) when applying
132  * atomic state after it has been checked and swapped.  To iterate over the
133  * planes which *will* be attached (for ->atomic_check()) see
134  * drm_crtc_for_each_pending_plane()
135  */
136 #define drm_atomic_crtc_for_each_plane(plane, crtc) \
137         drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
138 
139 /**
140  * drm_crtc_atomic_state_for_each_plane - iterate over attached planes in new state
141  * @plane: the loop cursor
142  * @crtc_state: the incoming crtc-state
143  *
144  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
145  * attached if the specified state is applied.  Useful during (for example)
146  * ->atomic_check() operations, to validate the incoming state
147  */
148 #define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
149         drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
150 
151 /*
152  * drm_atomic_plane_disabling - check whether a plane is being disabled
153  * @plane: plane object
154  * @old_state: previous atomic state
155  *
156  * Checks the atomic state of a plane to determine whether it's being disabled
157  * or not. This also WARNs if it detects an invalid state (both CRTC and FB
158  * need to either both be NULL or both be non-NULL).
159  *
160  * RETURNS:
161  * True if the plane is being disabled, false otherwise.
162  */
163 static inline bool
164 drm_atomic_plane_disabling(struct drm_plane *plane,
165                            struct drm_plane_state *old_state)
166 {
167         /*
168          * When disabling a plane, CRTC and FB should always be NULL together.
169          * Anything else should be considered a bug in the atomic core, so we
170          * gently warn about it.
171          */
172         WARN_ON((plane->state->crtc == NULL && plane->state->fb != NULL) ||
173                 (plane->state->crtc != NULL && plane->state->fb == NULL));
174 
175         /*
176          * When using the transitional helpers, old_state may be NULL. If so,
177          * we know nothing about the current state and have to assume that it
178          * might be enabled.
179          *
180          * When using the atomic helpers, old_state won't be NULL. Therefore
181          * this check assumes that either the driver will have reconstructed
182          * the correct state in ->reset() or that the driver will have taken
183          * appropriate measures to disable all planes.
184          */
185         return (!old_state || old_state->crtc) && !plane->state->crtc;
186 }
187 
188 #endif /* DRM_ATOMIC_HELPER_H_ */
189 

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