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 #include <drm/drm_modeset_helper_vtables.h>
  33 #include <drm/drm_modeset_helper.h>
  34
  35 struct drm_atomic_state;
  36 struct drm_private_obj;
  37 struct drm_private_state;
  38
  39 int drm_atomic_helper_check_modeset(struct drm_device *dev,
  40                                 struct drm_atomic_state *state);
  41 int drm_atomic_helper_check_plane_state(struct drm_plane_state *plane_state,
  42                                         const struct drm_crtc_state *crtc_state,
  43                                         int min_scale,
  44                                         int max_scale,
  45                                         bool can_position,
  46                                         bool can_update_disabled);
  47 int drm_atomic_helper_check_planes(struct drm_device *dev,
  48                                struct drm_atomic_state *state);
  49 int drm_atomic_helper_check(struct drm_device *dev,
  50                             struct drm_atomic_state *state);
  51 void drm_atomic_helper_commit_tail(struct drm_atomic_state *state);
  52 void drm_atomic_helper_commit_tail_rpm(struct drm_atomic_state *state);
  53 int drm_atomic_helper_commit(struct drm_device *dev,
  54                              struct drm_atomic_state *state,
  55                              bool nonblock);
  56 int drm_atomic_helper_async_check(struct drm_device *dev,
  57                                   struct drm_atomic_state *state);
  58 void drm_atomic_helper_async_commit(struct drm_device *dev,
  59                                     struct drm_atomic_state *state);
  60
  61 int drm_atomic_helper_wait_for_fences(struct drm_device *dev,
  62                                         struct drm_atomic_state *state,
  63                                         bool pre_swap);
  64
  65 void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
  66                                         struct drm_atomic_state *old_state);
  67
  68 void drm_atomic_helper_wait_for_flip_done(struct drm_device *dev,
  69                                           struct drm_atomic_state *old_state);
  70
  71 void
  72 drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
  73                                               struct drm_atomic_state *old_state);
  74
  75 void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
  76                                                struct drm_atomic_state *state);
  77 void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
  78                                           struct drm_atomic_state *old_state);
  79
  80 int drm_atomic_helper_prepare_planes(struct drm_device *dev,
  81                                      struct drm_atomic_state *state);
  82
  83 #define DRM_PLANE_COMMIT_ACTIVE_ONLY                    BIT(0)
  84 #define DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET       BIT(1)
  85
  86 void drm_atomic_helper_commit_planes(struct drm_device *dev,
  87                                      struct drm_atomic_state *state,
  88                                      uint32_t flags);
  89 void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
  90                                       struct drm_atomic_state *old_state);
  91 void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
  92 void
  93 drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state,
  94                                          bool atomic);
  95
  96 int __must_check drm_atomic_helper_swap_state(struct drm_atomic_state *state,
  97                                               bool stall);
  98
  99 /* nonblocking commit helpers */
 100 int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
 101                                    bool nonblock);
 102 void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *state);
 103 void drm_atomic_helper_fake_vblank(struct drm_atomic_state *state);
 104 void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *state);
 105 void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *state);
 106
 107 /* implementations for legacy interfaces */
 108 int drm_atomic_helper_update_plane(struct drm_plane *plane,
 109                                    struct drm_crtc *crtc,
 110                                    struct drm_framebuffer *fb,
 111                                    int crtc_x, int crtc_y,
 112                                    unsigned int crtc_w, unsigned int crtc_h,
 113                                    uint32_t src_x, uint32_t src_y,
 114                                    uint32_t src_w, uint32_t src_h,
 115                                    struct drm_modeset_acquire_ctx *ctx);
 116 int drm_atomic_helper_disable_plane(struct drm_plane *plane,
 117                                     struct drm_modeset_acquire_ctx *ctx);
 118 int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
 119                 struct drm_plane_state *plane_state);
 120 int drm_atomic_helper_set_config(struct drm_mode_set *set,
 121                                  struct drm_modeset_acquire_ctx *ctx);
 122 int __drm_atomic_helper_set_config(struct drm_mode_set *set,
 123                 struct drm_atomic_state *state);
 124
 125 int drm_atomic_helper_disable_all(struct drm_device *dev,
 126                                   struct drm_modeset_acquire_ctx *ctx);
 127 void drm_atomic_helper_shutdown(struct drm_device *dev);
 128 struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev);
 129 int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state,
 130                                               struct drm_modeset_acquire_ctx *ctx);
 131 int drm_atomic_helper_resume(struct drm_device *dev,
 132                              struct drm_atomic_state *state);
 133
 134 int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
 135                                 struct drm_framebuffer *fb,
 136                                 struct drm_pending_vblank_event *event,
 137                                 uint32_t flags,
 138                                 struct drm_modeset_acquire_ctx *ctx);
 139 int drm_atomic_helper_page_flip_target(
 140                                 struct drm_crtc *crtc,
 141                                 struct drm_framebuffer *fb,
 142                                 struct drm_pending_vblank_event *event,
 143                                 uint32_t flags,
 144                                 uint32_t target,
 145                                 struct drm_modeset_acquire_ctx *ctx);
 146 struct drm_encoder *
 147 drm_atomic_helper_best_encoder(struct drm_connector *connector);
 148
 149 /* default implementations for state handling */
 150 void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
 151 void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
 152                                               struct drm_crtc_state *state);
 153 struct drm_crtc_state *
 154 drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc);
 155 void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state);
 156 void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
 157                                           struct drm_crtc_state *state);
 158
 159 void drm_atomic_helper_plane_reset(struct drm_plane *plane);
 160 void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
 161                                                struct drm_plane_state *state);
 162 struct drm_plane_state *
 163 drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane);
 164 void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state);
 165 void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
 166                                           struct drm_plane_state *state);
 167
 168 void __drm_atomic_helper_connector_reset(struct drm_connector *connector,
 169                                          struct drm_connector_state *conn_state);
 170 void drm_atomic_helper_connector_reset(struct drm_connector *connector);
 171 void
 172 __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
 173                                            struct drm_connector_state *state);
 174 struct drm_connector_state *
 175 drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector);
 176 struct drm_atomic_state *
 177 drm_atomic_helper_duplicate_state(struct drm_device *dev,
 178                                   struct drm_modeset_acquire_ctx *ctx);
 179 void
 180 __drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state);
 181 void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
 182                                           struct drm_connector_state *state);
 183 int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
 184                                        u16 *red, u16 *green, u16 *blue,
 185                                        uint32_t size,
 186                                        struct drm_modeset_acquire_ctx *ctx);
 187 void __drm_atomic_helper_private_obj_duplicate_state(struct drm_private_obj *obj,
 188                                                      struct drm_private_state *state);
 189
 190 /**
 191  * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
 192  * @plane: the loop cursor
 193  * @crtc:  the crtc whose planes are iterated
 194  *
 195  * This iterates over the current state, useful (for example) when applying
 196  * atomic state after it has been checked and swapped.  To iterate over the
 197  * planes which *will* be attached (more useful in code called from
 198  * &drm_mode_config_funcs.atomic_check) see
 199  * drm_atomic_crtc_state_for_each_plane().
 200  */
 201 #define drm_atomic_crtc_for_each_plane(plane, crtc) \
 202         drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
 203
 204 /**
 205  * drm_crtc_atomic_state_for_each_plane - iterate over attached planes in new state
 206  * @plane: the loop cursor
 207  * @crtc_state: the incoming crtc-state
 208  *
 209  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
 210  * attached if the specified state is applied.  Useful during for example
 211  * in code called from &drm_mode_config_funcs.atomic_check operations, to
 212  * validate the incoming state.
 213  */
 214 #define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
 215         drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
 216
 217 /**
 218  * drm_crtc_atomic_state_for_each_plane_state - iterate over attached planes in new state
 219  * @plane: the loop cursor
 220  * @plane_state: loop cursor for the plane's state, must be const
 221  * @crtc_state: the incoming crtc-state
 222  *
 223  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
 224  * attached if the specified state is applied.  Useful during for example
 225  * in code called from &drm_mode_config_funcs.atomic_check operations, to
 226  * validate the incoming state.
 227  *
 228  * Compared to just drm_atomic_crtc_state_for_each_plane() this also fills in a
 229  * const plane_state. This is useful when a driver just wants to peek at other
 230  * active planes on this crtc, but does not need to change it.
 231  */
 232 #define drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) \
 233         drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask) \
 234                 for_each_if ((plane_state = \
 235                               __drm_atomic_get_current_plane_state((crtc_state)->state, \
 236                                                                    plane)))
 237
 238 /**
 239  * drm_atomic_plane_disabling - check whether a plane is being disabled
 240  * @old_plane_state: old atomic plane state
 241  * @new_plane_state: new atomic plane state
 242  *
 243  * Checks the atomic state of a plane to determine whether it's being disabled
 244  * or not. This also WARNs if it detects an invalid state (both CRTC and FB
 245  * need to either both be NULL or both be non-NULL).
 246  *
 247  * RETURNS:
 248  * True if the plane is being disabled, false otherwise.
 249  */
 250 static inline bool
 251 drm_atomic_plane_disabling(struct drm_plane_state *old_plane_state,
 252                            struct drm_plane_state *new_plane_state)
 253 {
 254         /*
 255          * When disabling a plane, CRTC and FB should always be NULL together.
 256          * Anything else should be considered a bug in the atomic core, so we
 257          * gently warn about it.
 258          */
 259         WARN_ON((new_plane_state->crtc == NULL && new_plane_state->fb != NULL) ||
 260                 (new_plane_state->crtc != NULL && new_plane_state->fb == NULL));
 261
 262         return old_plane_state->crtc && !new_plane_state->crtc;
 263 }
 264
 265 #endif /* DRM_ATOMIC_HELPER_H_ */