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