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