include/drm/drm_damage_helper.h

   1 /* SPDX-License-Identifier: GPL-2.0 OR MIT */
   2 /**************************************************************************
   3  *
   4  * Copyright (c) 2018 VMware, Inc., Palo Alto, CA., USA
   5  * All Rights Reserved.
   6  *
   7  * Permission is hereby granted, free of charge, to any person obtaining a
   8  * copy of this software and associated documentation files (the
   9  * "Software"), to deal in the Software without restriction, including
  10  * without limitation the rights to use, copy, modify, merge, publish,
  11  * distribute, sub license, and/or sell copies of the Software, and to
  12  * permit persons to whom the Software is furnished to do so, subject to
  13  * the following conditions:
  14  *
  15  * The above copyright notice and this permission notice (including the
  16  * next paragraph) shall be included in all copies or substantial portions
  17  * of the Software.
  18  *
  19  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  20  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  21  * FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT. IN NO EVENT SHALL
  22  * THE COPYRIGHT HOLDERS, AUTHORS AND/OR ITS SUPPLIERS BE LIABLE FOR ANY CLAIM,
  23  * DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
  24  * OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
  25  * USE OR OTHER DEALINGS IN THE SOFTWARE.
  26  *
  27  * Authors:
  28  * Deepak Rawat <drawat@vmware.com>
  29  *
  30  **************************************************************************/
  31
  32 #ifndef DRM_DAMAGE_HELPER_H_
  33 #define DRM_DAMAGE_HELPER_H_
  34
  35 #include <drm/drm_atomic_helper.h>
  36
  37 /**
  38  * drm_atomic_for_each_plane_damage - Iterator macro for plane damage.
  39  * @iter: The iterator to advance.
  40  * @rect: Return a rectangle in fb coordinate clipped to plane src.
  41  *
  42  * Note that if the first call to iterator macro return false then no need to do
  43  * plane update. Iterator will return full plane src when damage is not passed
  44  * by user-space.
  45  */
  46 #define drm_atomic_for_each_plane_damage(iter, rect) \
  47         while (drm_atomic_helper_damage_iter_next(iter, rect))
  48
  49 /**
  50  * struct drm_atomic_helper_damage_iter - Closure structure for damage iterator.
  51  *
  52  * This structure tracks state needed to walk the list of plane damage clips.
  53  */
  54 struct drm_atomic_helper_damage_iter {
  55         /* private: Plane src in whole number. */
  56         struct drm_rect plane_src;
  57         /* private: Rectangles in plane damage blob. */
  58         const struct drm_rect *clips;
  59         /* private: Number of rectangles in plane damage blob. */
  60         uint32_t num_clips;
  61         /* private: Current clip iterator is advancing on. */
  62         uint32_t curr_clip;
  63         /* private: Whether need full plane update. */
  64         bool full_update;
  65 };
  66
  67 void drm_plane_enable_fb_damage_clips(struct drm_plane *plane);
  68 void drm_atomic_helper_check_plane_damage(struct drm_atomic_state *state,
  69                                           struct drm_plane_state *plane_state);
  70 int drm_atomic_helper_dirtyfb(struct drm_framebuffer *fb,
  71                               struct drm_file *file_priv, unsigned int flags,
  72                               unsigned int color, struct drm_clip_rect *clips,
  73                               unsigned int num_clips);
  74 void
  75 drm_atomic_helper_damage_iter_init(struct drm_atomic_helper_damage_iter *iter,
  76                                    const struct drm_plane_state *old_state,
  77                                    const struct drm_plane_state *new_state);
  78 bool
  79 drm_atomic_helper_damage_iter_next(struct drm_atomic_helper_damage_iter *iter,
  80                                    struct drm_rect *rect);
  81 bool drm_atomic_helper_damage_merged(const struct drm_plane_state *old_state,
  82                                      struct drm_plane_state *state,
  83                                      struct drm_rect *rect);
  84
  85 /**
  86  * drm_helper_get_plane_damage_clips - Returns damage clips in &drm_rect.
  87  * @state: Plane state.
  88  *
  89  * Returns plane damage rectangles in internal &drm_rect. Currently &drm_rect
  90  * can be obtained by simply typecasting &drm_mode_rect. This is because both
  91  * are signed 32 and during drm_atomic_check_only() it is verified that damage
  92  * clips are inside fb.
  93  *
  94  * Return: Clips in plane fb_damage_clips blob property.
  95  */
  96 static inline struct drm_rect *
  97 drm_helper_get_plane_damage_clips(const struct drm_plane_state *state)
  98 {
  99         return (struct drm_rect *)drm_plane_get_damage_clips(state);
 100 }
 101
 102 #endif