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TOMOYO Linux Cross Reference
Linux/include/drm/drm_damage_helper.h

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  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
103 

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