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 void drm_atomic_helper_commit_tail(struct drm_atomic_state *state);
  42 int drm_atomic_helper_commit(struct drm_device *dev,
  43                              struct drm_atomic_state *state,
  44                              bool nonblock);
  45
  46 void drm_atomic_helper_wait_for_fences(struct drm_device *dev,
  47                                         struct drm_atomic_state *state);
  48 bool drm_atomic_helper_framebuffer_changed(struct drm_device *dev,
  49                                            struct drm_atomic_state *old_state,
  50                                            struct drm_crtc *crtc);
  51
  52 void drm_atomic_helper_wait_for_vblanks(struct drm_device *dev,
  53                                         struct drm_atomic_state *old_state);
  54
  55 void
  56 drm_atomic_helper_update_legacy_modeset_state(struct drm_device *dev,
  57                                               struct drm_atomic_state *old_state);
  58
  59 void drm_atomic_helper_commit_modeset_disables(struct drm_device *dev,
  60                                                struct drm_atomic_state *state);
  61 void drm_atomic_helper_commit_modeset_enables(struct drm_device *dev,
  62                                           struct drm_atomic_state *old_state);
  63
  64 int drm_atomic_helper_prepare_planes(struct drm_device *dev,
  65                                      struct drm_atomic_state *state);
  66 void drm_atomic_helper_commit_planes(struct drm_device *dev,
  67                                      struct drm_atomic_state *state,
  68                                      bool active_only);
  69 void drm_atomic_helper_cleanup_planes(struct drm_device *dev,
  70                                       struct drm_atomic_state *old_state);
  71 void drm_atomic_helper_commit_planes_on_crtc(struct drm_crtc_state *old_crtc_state);
  72 void drm_atomic_helper_disable_planes_on_crtc(struct drm_crtc *crtc,
  73                                               bool atomic);
  74
  75 void drm_atomic_helper_swap_state(struct drm_atomic_state *state,
  76                                   bool stall);
  77
  78 /* nonblocking commit helpers */
  79 int drm_atomic_helper_setup_commit(struct drm_atomic_state *state,
  80                                    bool nonblock);
  81 void drm_atomic_helper_wait_for_dependencies(struct drm_atomic_state *state);
  82 void drm_atomic_helper_commit_hw_done(struct drm_atomic_state *state);
  83 void drm_atomic_helper_commit_cleanup_done(struct drm_atomic_state *state);
  84
  85 /* implementations for legacy interfaces */
  86 int drm_atomic_helper_update_plane(struct drm_plane *plane,
  87                                    struct drm_crtc *crtc,
  88                                    struct drm_framebuffer *fb,
  89                                    int crtc_x, int crtc_y,
  90                                    unsigned int crtc_w, unsigned int crtc_h,
  91                                    uint32_t src_x, uint32_t src_y,
  92                                    uint32_t src_w, uint32_t src_h);
  93 int drm_atomic_helper_disable_plane(struct drm_plane *plane);
  94 int __drm_atomic_helper_disable_plane(struct drm_plane *plane,
  95                 struct drm_plane_state *plane_state);
  96 int drm_atomic_helper_set_config(struct drm_mode_set *set);
  97 int __drm_atomic_helper_set_config(struct drm_mode_set *set,
  98                 struct drm_atomic_state *state);
  99
 100 int drm_atomic_helper_disable_all(struct drm_device *dev,
 101                                   struct drm_modeset_acquire_ctx *ctx);
 102 struct drm_atomic_state *drm_atomic_helper_suspend(struct drm_device *dev);
 103 int drm_atomic_helper_resume(struct drm_device *dev,
 104                              struct drm_atomic_state *state);
 105
 106 int drm_atomic_helper_crtc_set_property(struct drm_crtc *crtc,
 107                                         struct drm_property *property,
 108                                         uint64_t val);
 109 int drm_atomic_helper_plane_set_property(struct drm_plane *plane,
 110                                         struct drm_property *property,
 111                                         uint64_t val);
 112 int drm_atomic_helper_connector_set_property(struct drm_connector *connector,
 113                                         struct drm_property *property,
 114                                         uint64_t val);
 115 int drm_atomic_helper_page_flip(struct drm_crtc *crtc,
 116                                 struct drm_framebuffer *fb,
 117                                 struct drm_pending_vblank_event *event,
 118                                 uint32_t flags);
 119 int drm_atomic_helper_connector_dpms(struct drm_connector *connector,
 120                                      int mode);
 121 struct drm_encoder *
 122 drm_atomic_helper_best_encoder(struct drm_connector *connector);
 123
 124 /* default implementations for state handling */
 125 void drm_atomic_helper_crtc_reset(struct drm_crtc *crtc);
 126 void __drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc,
 127                                               struct drm_crtc_state *state);
 128 struct drm_crtc_state *
 129 drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc);
 130 void __drm_atomic_helper_crtc_destroy_state(struct drm_crtc_state *state);
 131 void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
 132                                           struct drm_crtc_state *state);
 133
 134 void drm_atomic_helper_plane_reset(struct drm_plane *plane);
 135 void __drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane,
 136                                                struct drm_plane_state *state);
 137 struct drm_plane_state *
 138 drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane);
 139 void __drm_atomic_helper_plane_destroy_state(struct drm_plane_state *state);
 140 void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
 141                                           struct drm_plane_state *state);
 142
 143 void __drm_atomic_helper_connector_reset(struct drm_connector *connector,
 144                                          struct drm_connector_state *conn_state);
 145 void drm_atomic_helper_connector_reset(struct drm_connector *connector);
 146 void
 147 __drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector,
 148                                            struct drm_connector_state *state);
 149 struct drm_connector_state *
 150 drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector);
 151 struct drm_atomic_state *
 152 drm_atomic_helper_duplicate_state(struct drm_device *dev,
 153                                   struct drm_modeset_acquire_ctx *ctx);
 154 void
 155 __drm_atomic_helper_connector_destroy_state(struct drm_connector_state *state);
 156 void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
 157                                           struct drm_connector_state *state);
 158 int drm_atomic_helper_legacy_gamma_set(struct drm_crtc *crtc,
 159                                        u16 *red, u16 *green, u16 *blue,
 160                                        uint32_t size);
 161
 162 /**
 163  * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
 164  * @plane: the loop cursor
 165  * @crtc:  the crtc whose planes are iterated
 166  *
 167  * This iterates over the current state, useful (for example) when applying
 168  * atomic state after it has been checked and swapped.  To iterate over the
 169  * planes which *will* be attached (for ->atomic_check()) see
 170  * drm_atomic_crtc_state_for_each_plane().
 171  */
 172 #define drm_atomic_crtc_for_each_plane(plane, crtc) \
 173         drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
 174
 175 /**
 176  * drm_crtc_atomic_state_for_each_plane - iterate over attached planes in new state
 177  * @plane: the loop cursor
 178  * @crtc_state: the incoming crtc-state
 179  *
 180  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
 181  * attached if the specified state is applied.  Useful during (for example)
 182  * ->atomic_check() operations, to validate the incoming state.
 183  */
 184 #define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
 185         drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
 186
 187 /**
 188  * drm_crtc_atomic_state_for_each_plane_state - iterate over attached planes in new state
 189  * @plane: the loop cursor
 190  * @plane_state: loop cursor for the plane's state, must be const
 191  * @crtc_state: the incoming crtc-state
 192  *
 193  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
 194  * attached if the specified state is applied.  Useful during (for example)
 195  * ->atomic_check() operations, to validate the incoming state.
 196  *
 197  * Compared to just drm_atomic_crtc_state_for_each_plane() this also fills in a
 198  * const plane_state. This is useful when a driver just wants to peek at other
 199  * active planes on this crtc, but does not need to change it.
 200  */
 201 #define drm_atomic_crtc_state_for_each_plane_state(plane, plane_state, crtc_state) \
 202         drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask) \
 203                 for_each_if ((plane_state = \
 204                               __drm_atomic_get_current_plane_state((crtc_state)->state, \
 205                                                                    plane)))
 206
 207 /*
 208  * drm_atomic_plane_disabling - check whether a plane is being disabled
 209  * @plane: plane object
 210  * @old_state: previous atomic state
 211  *
 212  * Checks the atomic state of a plane to determine whether it's being disabled
 213  * or not. This also WARNs if it detects an invalid state (both CRTC and FB
 214  * need to either both be NULL or both be non-NULL).
 215  *
 216  * RETURNS:
 217  * True if the plane is being disabled, false otherwise.
 218  */
 219 static inline bool
 220 drm_atomic_plane_disabling(struct drm_plane *plane,
 221                            struct drm_plane_state *old_state)
 222 {
 223         /*
 224          * When disabling a plane, CRTC and FB should always be NULL together.
 225          * Anything else should be considered a bug in the atomic core, so we
 226          * gently warn about it.
 227          */
 228         WARN_ON((plane->state->crtc == NULL && plane->state->fb != NULL) ||
 229                 (plane->state->crtc != NULL && plane->state->fb == NULL));
 230
 231         /*
 232          * When using the transitional helpers, old_state may be NULL. If so,
 233          * we know nothing about the current state and have to assume that it
 234          * might be enabled.
 235          *
 236          * When using the atomic helpers, old_state won't be NULL. Therefore
 237          * this check assumes that either the driver will have reconstructed
 238          * the correct state in ->reset() or that the driver will have taken
 239          * appropriate measures to disable all planes.
 240          */
 241         return (!old_state || old_state->crtc) && !plane->state->crtc;
 242 }
 243
 244 #endif /* DRM_ATOMIC_HELPER_H_ */