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drm/damage-helper: Add drm_atomic_helper_damage_merged()

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Useful for drivers that only care about the combined damage.

v2: Remove unnecessary clearing of damage clips

Cc: Deepak Rawat <drawat@vmware.com>
Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
Acked-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20190115043643.2364-3-noralf@tronnes.org
This commit is contained in:
Noralf Trønnes 2019-01-15 05:36:40 +01:00
parent dbd62e16fd
commit 255f6fe736
2 changed files with 44 additions and 0 deletions
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41
drivers/gpu/drm/drm_damage_helper.c
View File

@ -333,3 +333,44 @@ drm_atomic_helper_damage_iter_next(struct drm_atomic_helper_damage_iter *iter,
return ret;
}
EXPORT_SYMBOL(drm_atomic_helper_damage_iter_next);
/**
* drm_atomic_helper_damage_merged - Merged plane damage
* @old_state: Old plane state for validation.
* @state: Plane state from which to iterate the damage clips.
* @rect: Returns the merged damage rectangle
*
* This function merges any valid plane damage clips into one rectangle and
* returns it in @rect.
*
* For details see: drm_atomic_helper_damage_iter_init() and
* drm_atomic_helper_damage_iter_next().
*
* Returns:
* True if there is valid plane damage otherwise false.
*/
bool drm_atomic_helper_damage_merged(const struct drm_plane_state *old_state,
struct drm_plane_state *state,
struct drm_rect *rect)
{
struct drm_atomic_helper_damage_iter iter;
struct drm_rect clip;
bool valid = false;
rect->x1 = INT_MAX;
rect->y1 = INT_MAX;
rect->x2 = 0;
rect->y2 = 0;
drm_atomic_helper_damage_iter_init(&iter, old_state, state);
drm_atomic_for_each_plane_damage(&iter, &clip) {
rect->x1 = min(rect->x1, clip.x1);
rect->y1 = min(rect->y1, clip.y1);
rect->x2 = max(rect->x2, clip.x2);
rect->y2 = max(rect->y2, clip.y2);
valid = true;
}
return valid;
}
EXPORT_SYMBOL(drm_atomic_helper_damage_merged);

3
include/drm/drm_damage_helper.h
View File

@ -78,6 +78,9 @@ drm_atomic_helper_damage_iter_init(struct drm_atomic_helper_damage_iter *iter,
bool
drm_atomic_helper_damage_iter_next(struct drm_atomic_helper_damage_iter *iter,
struct drm_rect *rect);
bool drm_atomic_helper_damage_merged(const struct drm_plane_state *old_state,
struct drm_plane_state *state,
struct drm_rect *rect);
/**
* drm_helper_get_plane_damage_clips - Returns damage clips in &drm_rect.