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_pre_planes(struct drm_device *dev,
  47                                          struct drm_atomic_state *state);
  48 void drm_atomic_helper_commit_post_planes(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 struct drm_crtc_state *
  91 drm_atomic_helper_crtc_duplicate_state(struct drm_crtc *crtc);
  92 void drm_atomic_helper_crtc_destroy_state(struct drm_crtc *crtc,
  93                                           struct drm_crtc_state *state);
  94
  95 void drm_atomic_helper_plane_reset(struct drm_plane *plane);
  96 struct drm_plane_state *
  97 drm_atomic_helper_plane_duplicate_state(struct drm_plane *plane);
  98 void drm_atomic_helper_plane_destroy_state(struct drm_plane *plane,
  99                                           struct drm_plane_state *state);
 100
 101 void drm_atomic_helper_connector_reset(struct drm_connector *connector);
 102 struct drm_connector_state *
 103 drm_atomic_helper_connector_duplicate_state(struct drm_connector *connector);
 104 void drm_atomic_helper_connector_destroy_state(struct drm_connector *connector,
 105                                           struct drm_connector_state *state);
 106
 107 /**
 108  * drm_atomic_crtc_for_each_plane - iterate over planes currently attached to CRTC
 109  * @plane: the loop cursor
 110  * @crtc:  the crtc whose planes are iterated
 111  *
 112  * This iterates over the current state, useful (for example) when applying
 113  * atomic state after it has been checked and swapped.  To iterate over the
 114  * planes which *will* be attached (for ->atomic_check()) see
 115  * drm_crtc_for_each_pending_plane()
 116  */
 117 #define drm_atomic_crtc_for_each_plane(plane, crtc) \
 118         drm_for_each_plane_mask(plane, (crtc)->dev, (crtc)->state->plane_mask)
 119
 120 /**
 121  * drm_crtc_atomic_state_for_each_plane - iterate over attached planes in new state
 122  * @plane: the loop cursor
 123  * @crtc_state: the incoming crtc-state
 124  *
 125  * Similar to drm_crtc_for_each_plane(), but iterates the planes that will be
 126  * attached if the specified state is applied.  Useful during (for example)
 127  * ->atomic_check() operations, to validate the incoming state
 128  */
 129 #define drm_atomic_crtc_state_for_each_plane(plane, crtc_state) \
 130         drm_for_each_plane_mask(plane, (crtc_state)->state->dev, (crtc_state)->plane_mask)
 131
 132 /*
 133  * drm_atomic_plane_disabling - check whether a plane is being disabled
 134  * @plane: plane object
 135  * @old_state: previous atomic state
 136  *
 137  * Checks the atomic state of a plane to determine whether it's being disabled
 138  * or not. This also WARNs if it detects an invalid state (both CRTC and FB
 139  * need to either both be NULL or both be non-NULL).
 140  *
 141  * RETURNS:
 142  * True if the plane is being disabled, false otherwise.
 143  */
 144 static inline bool
 145 drm_atomic_plane_disabling(struct drm_plane *plane,
 146                            struct drm_plane_state *old_state)
 147 {
 148         /*
 149          * When disabling a plane, CRTC and FB should always be NULL together.
 150          * Anything else should be considered a bug in the atomic core, so we
 151          * gently warn about it.
 152          */
 153         WARN_ON((plane->state->crtc == NULL && plane->state->fb != NULL) ||
 154                 (plane->state->crtc != NULL && plane->state->fb == NULL));
 155
 156         /*
 157          * When using the transitional helpers, old_state may be NULL. If so,
 158          * we know nothing about the current state and have to assume that it
 159          * might be enabled.
 160          *
 161          * When using the atomic helpers, old_state won't be NULL. Therefore
 162          * this check assumes that either the driver will have reconstructed
 163          * the correct state in ->reset() or that the driver will have taken
 164          * appropriate measures to disable all planes.
 165          */
 166         return (!old_state || old_state->crtc) && !plane->state->crtc;
 167 }
 168
 169 #endif /* DRM_ATOMIC_HELPER_H_ */