drm/damage-helper: Add drm_atomic_helper_damage_merged()

	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);

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.