kernel/include/drm/drm_atomic_helper.h

   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 struct drm_atomic_state;
  34
  35 int drm_atomic_helper_check_modeset(struct drm_device *dev,
  36                                 struct drm_atomic_state *state);
  37 int drm_atomic_helper_check_planes(struct drm_device *dev,
  38                                struct drm_atomic_state *state);
  39 int drm_atomic_helper_check(struct drm_device *dev,
  40                             struct drm_atomic_state *state);
  41 int drm_atomic_helper_commit(struct drm_device *dev,
  42                              struct drm_atomic_state *state,
  43                              bool async);
  44
  45 void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
  46                                         struct drm_atomic_state *old_state);
  47
  48 void
  49 drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
  50                                               struct drm_atomic_state *old_state);
  51
  52 void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
  53                                                struct drm_atomic_state *state);
  54 void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
  55                                           struct drm_atomic_state *old_state);
  56
  57 int drm_atomic_helper_prepare_planes(struct drm_device *dev,
  58                                      struct drm_atomic_state *state);
  59 void drm_atomic_helper_commit_planes(struct drm_device *dev,
  60                                      struct drm_atomic_state *state,
  61                                      bool active_only);
  62 void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
  63                                       struct drm_atomic_state *old_state);
  64 void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
  65
  66 void drm_atomic_helper_swap_state(struct drm_device *dev,
  67                                   struct drm_atomic_state *state);
  68
  69 /* implementations for legacy interfaces */
  70 int drm_atomic_helper_update_plane(struct drm_plane *plane,
  71                                    struct drm_crtc *crtc,
  72                                    struct drm_framebuffer *fb,
  73                                    int crtc_x, int crtc_y,
  74                                    unsigned int crtc_w, unsigned int crtc_h,
  75                                    uint32_t src_x, uint32_t src_y,
  76                                    uint32_t src_w, uint32_t src_h);
  77 int drm_atomic_helper_disable_plane(struct drm_plane *plane);
  78 int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
  79                 struct drm_plane_state *plane_state);
  80 int drm_atomic_helper_set_config(struct drm_mode_set *set);
  81 int __drm_atomic_helper_set_config(struct drm_mode_set *set,
  82                 struct drm_atomic_state *state);
  83
  84 int drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc,
  85                                         struct drm_property *property,
  86                                         uint64_t val);
  87 int drm_atomic_helper_plane_set_property(struct drm_plane *plane,
  88                                         struct drm_property *property,
  89                                         uint64_t val);
  90 int drm_atomic_helper_connector_set_property(struct drm_connector *connector,
  91                                         struct drm_property *property,
  92                                         uint64_t val);
  93 int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
  94                                 struct drm_framebuffer *fb,
  95                                 struct drm_pending_vblank_event *event,
  96                                 uint32_t flags);
  97 int drm_atomic_helper_connector_dpms(struct drm_connector *connector,
  98                                      int mode);
  99
 100 /* default implementations for state handling */
 101 void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
 102 void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
 103                                               struct drm_crtc_state *state);
 104 struct drm_crtc_state *
 105 drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc);
 106 void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
 107                                             struct drm_crtc_state *state);
 108 void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
 109                                           struct drm_crtc_state *state);
 110
 111 void drm_atomic_helper_plane_reset(struct drm_plane *plane);
 112 void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
 113                                                struct drm_plane_state *state);
 114 struct drm_plane_state *
 115 drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane);
 116 void __drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
 117                                              struct drm_plane_state *state);
 118 void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
 119                                           struct drm_plane_state *state);
 120
 121 void drm_atomic_helper_connector_reset(struct drm_connector *connector);
 122 void
 123 __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
 124                                            struct drm_connector_state *state);
 125 struct drm_connector_state *
 126 drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector);
 127 struct drm_atomic_state *
 128 drm_atomic_helper_duplicate_state(struct drm_device *dev,
 129                                   struct drm_modeset_acquire_ctx *ctx);
 130 void
 131 __drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
 132                                             struct drm_connector_state *state);
 133 void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
 134                                           struct drm_connector_state *state);
 135
 136 /**
 137  * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
 138  * @plane: the loop cursor
 139  * @crtc:  the crtc whose planes are iterated
 140  *
 141  * This iterates over the current state, useful (for example) when applying
 142  * atomic state after it has been checked and swapped.  To iterate over the
 143  * planes which *will* be attached (for ->atomic_check()) see
 144  * drm_crtc_for_each_pending_plane()
 145  */
 146 #define drm_atomic_crtc_for_each_plane(plane, crtc) \
 147         drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
 148
 149 /**
 150  * drm_crtc_atomic_state_for_each_plane - iterate over attached planes in new state
 151  * @plane: the loop cursor
 152  * @crtc_state: the incoming crtc-state
 153  *
 154  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
 155  * attached if the specified state is applied.  Useful during (for example)
 156  * ->atomic_check() operations, to validate the incoming state
 157  */
 158 #define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
 159         drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
 160
 161 /*
 162  * drm_atomic_plane_disabling - check whether a plane is being disabled
 163  * @plane: plane object
 164  * @old_state: previous atomic state
 165  *
 166  * Checks the atomic state of a plane to determine whether it's being disabled
 167  * or not. This also WARNs if it detects an invalid state (both CRTC and FB
 168  * need to either both be NULL or both be non-NULL).
 169  *
 170  * RETURNS:
 171  * True if the plane is being disabled, false otherwise.
 172  */
 173 static inline bool
 174 drm_atomic_plane_disabling(struct drm_plane *plane,
 175                            struct drm_plane_state *old_state)
 176 {
 177         /*
 178          * When disabling a plane, CRTC and FB should always be NULL together.
 179          * Anything else should be considered a bug in the atomic core, so we
 180          * gently warn about it.
 181          */
 182         WARN_ON((plane->state->crtc == NULL && plane->state->fb != NULL) ||
 183                 (plane->state->crtc != NULL && plane->state->fb == NULL));
 184
 185         /*
 186          * When using the transitional helpers, old_state may be NULL. If so,
 187          * we know nothing about the current state and have to assume that it
 188          * might be enabled.
 189          *
 190          * When using the atomic helpers, old_state won't be NULL. Therefore
 191          * this check assumes that either the driver will have reconstructed
 192          * the correct state in ->reset() or that the driver will have taken
 193          * appropriate measures to disable all planes.
 194          */
 195         return (!old_state || old_state->crtc) && !plane->state->crtc;
 196 }
 197
 198 #endif /* DRM_ATOMIC_HELPER_H_ */