Useful for drivers that only care about the combined damage.
v2: Remove unnecessary clearing of damage clips
Cc: Deepak Rawat <drawat@xxxxxxxxxx>
Signed-off-by: Noralf Trønnes <noralf@xxxxxxxxxxx>
Acked-by: Sam Ravnborg <sam@xxxxxxxxxxxx>
Acked-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
---
drivers/gpu/drm/drm_damage_helper.c | 41 +++++++++++++++++++++++++++++
include/drm/drm_damage_helper.h | 3 +++
2 files changed, 44 insertions(+)
diff --git a/drivers/gpu/drm/drm_damage_helper.c b/drivers/gpu/drm/drm_damage_helper.c
index 31032407254d..e16aa5ae00b4 100644
--- a/drivers/gpu/drm/drm_damage_helper.c
+++ b/drivers/gpu/drm/drm_damage_helper.c
@@ -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);
diff --git a/include/drm/drm_damage_helper.h b/include/drm/drm_damage_helper.h
index 4487660b26b8..40c34a5bf149 100644
--- a/include/drm/drm_damage_helper.h
+++ b/include/drm/drm_damage_helper.h
@@ -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.
--
2.20.1
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