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 #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
  78 drm_atomic_helper_calc_timestamping_constants(struct drm_atomic_state *state);
  79
  80 void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
  81                                                struct drm_atomic_state *state);
  82 void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
  83                                           struct drm_atomic_state *old_state);
  84
  85 int drm_atomic_helper_prepare_planes(struct drm_device *dev,
  86                                      struct drm_atomic_state *state);
  87
  88 #define DRM_PLANE_COMMIT_ACTIVE_ONLY                    BIT(0)
  89 #define DRM_PLANE_COMMIT_NO_DISABLE_AFTER_MODESET       BIT(1)
  90
  91 void drm_atomic_helper_commit_planes(struct drm_device *dev,
  92                                      struct drm_atomic_state *state,
  93                                      uint32_t flags);
  94 void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
  95                                       struct drm_atomic_state *old_state);
  96 void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
  97 void
  98 drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc_state *old_crtc_state,
  99                                          bool atomic);
 100
 101 int __must_check drm_atomic_helper_swap_state(struct drm_atomic_state *state,
 102                                               bool stall);
 103
 104 /* nonblocking commit helpers */
 105 int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
 106                                    bool nonblock);
 107 void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *state);
 108 void drm_atomic_helper_fake_vblank(struct drm_atomic_state *state);
 109 void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *state);
 110 void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *state);
 111
 112 /* implementations for legacy interfaces */
 113 int drm_atomic_helper_update_plane(struct drm_plane *plane,
 114                                    struct drm_crtc *crtc,
 115                                    struct drm_framebuffer *fb,
 116                                    int crtc_x, int crtc_y,
 117                                    unsigned int crtc_w, unsigned int crtc_h,
 118                                    uint32_t src_x, uint32_t src_y,
 119                                    uint32_t src_w, uint32_t src_h,
 120                                    struct drm_modeset_acquire_ctx *ctx);
 121 int drm_atomic_helper_disable_plane(struct drm_plane *plane,
 122                                     struct drm_modeset_acquire_ctx *ctx);
 123 int drm_atomic_helper_set_config(struct drm_mode_set *set,
 124                                  struct drm_modeset_acquire_ctx *ctx);
 125
 126 int drm_atomic_helper_disable_all(struct drm_device *dev,
 127                                   struct drm_modeset_acquire_ctx *ctx);
 128 void drm_atomic_helper_shutdown(struct drm_device *dev);
 129 struct drm_atomic_state *
 130 drm_atomic_helper_duplicate_state(struct drm_device *dev,
 131                                   struct drm_modeset_acquire_ctx *ctx);
 132 struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev);
 133 int drm_atomic_helper_commit_duplicated_state(struct drm_atomic_state *state,
 134                                               struct drm_modeset_acquire_ctx *ctx);
 135 int drm_atomic_helper_resume(struct drm_device *dev,
 136                              struct drm_atomic_state *state);
 137
 138 int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
 139                                 struct drm_framebuffer *fb,
 140                                 struct drm_pending_vblank_event *event,
 141                                 uint32_t flags,
 142                                 struct drm_modeset_acquire_ctx *ctx);
 143 int drm_atomic_helper_page_flip_target(
 144                                 struct drm_crtc *crtc,
 145                                 struct drm_framebuffer *fb,
 146                                 struct drm_pending_vblank_event *event,
 147                                 uint32_t flags,
 148                                 uint32_t target,
 149                                 struct drm_modeset_acquire_ctx *ctx);
 150
 151 /**
 152  * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
 153  * @plane: the loop cursor
 154  * @crtc:  the CRTC whose planes are iterated
 155  *
 156  * This iterates over the current state, useful (for example) when applying
 157  * atomic state after it has been checked and swapped.  To iterate over the
 158  * planes which *will* be attached (more useful in code called from
 159  * &drm_mode_config_funcs.atomic_check) see
 160  * drm_atomic_crtc_state_for_each_plane().
 161  */
 162 #define drm_atomic_crtc_for_each_plane(plane, crtc) \
 163         drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
 164
 165 /**
 166  * drm_atomic_crtc_state_for_each_plane - iterate over attached planes in new state
 167  * @plane: the loop cursor
 168  * @crtc_state: the incoming CRTC state
 169  *
 170  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
 171  * attached if the specified state is applied.  Useful during for example
 172  * in code called from &drm_mode_config_funcs.atomic_check operations, to
 173  * validate the incoming state.
 174  */
 175 #define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
 176         drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
 177
 178 /**
 179  * drm_atomic_crtc_state_for_each_plane_state - iterate over attached planes in new state
 180  * @plane: the loop cursor
 181  * @plane_state: loop cursor for the plane's state, must be const
 182  * @crtc_state: the incoming CRTC state
 183  *
 184  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
 185  * attached if the specified state is applied.  Useful during for example
 186  * in code called from &drm_mode_config_funcs.atomic_check operations, to
 187  * validate the incoming state.
 188  *
 189  * Compared to just drm_atomic_crtc_state_for_each_plane() this also fills in a
 190  * const plane_state. This is useful when a driver just wants to peek at other
 191  * active planes on this CRTC, but does not need to change it.
 192  */
 193 #define drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) \
 194         drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask) \
 195                 for_each_if ((plane_state = \
 196                               __drm_atomic_get_current_plane_state((crtc_state)->state, \
 197                                                                    plane)))
 198
 199 /**
 200  * drm_atomic_plane_disabling - check whether a plane is being disabled
 201  * @old_plane_state: old atomic plane state
 202  * @new_plane_state: new atomic plane state
 203  *
 204  * Checks the atomic state of a plane to determine whether it's being disabled
 205  * or not. This also WARNs if it detects an invalid state (both CRTC and FB
 206  * need to either both be NULL or both be non-NULL).
 207  *
 208  * RETURNS:
 209  * True if the plane is being disabled, false otherwise.
 210  */
 211 static inline bool
 212 drm_atomic_plane_disabling(struct drm_plane_state *old_plane_state,
 213                            struct drm_plane_state *new_plane_state)
 214 {
 215         /*
 216          * When disabling a plane, CRTC and FB should always be NULL together.
 217          * Anything else should be considered a bug in the atomic core, so we
 218          * gently warn about it.
 219          */
 220         WARN_ON((new_plane_state->crtc == NULL && new_plane_state->fb != NULL) ||
 221                 (new_plane_state->crtc != NULL && new_plane_state->fb == NULL));
 222
 223         return old_plane_state->crtc && !new_plane_state->crtc;
 224 }
 225
 226 u32 *
 227 drm_atomic_helper_bridge_propagate_bus_fmt(struct drm_bridge *bridge,
 228                                         struct drm_bridge_state *bridge_state,
 229                                         struct drm_crtc_state *crtc_state,
 230                                         struct drm_connector_state *conn_state,
 231                                         u32 output_fmt,
 232                                         unsigned int *num_input_fmts);
 233
 234 #endif /* DRM_ATOMIC_HELPER_H_ */