[PATCH v9 1/8] drm/damage-helper: add const qualifier in drm_atomic_helper_damage_merged()

[Vinod Govindapillai <vinod.govindapillai@intel.com>]

Add a const qualifier for the "state" parameter as well as we could
use this helper to get the combined damage in cases of const
drm_plane_state as well. Needed mainly for xe driver big joiner cases
where we need to track the damage from immutable plane state.

Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
---
 drivers/gpu/drm/drm_damage_helper.c | 2 +-
 include/drm/drm_damage_helper.h     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/drivers/gpu/drm/drm_damage_helper.c b/drivers/gpu/drm/drm_damage_helper.c
index afb02aae707b..44a5a36806e3 100644
--- a/drivers/gpu/drm/drm_damage_helper.c
+++ b/drivers/gpu/drm/drm_damage_helper.c
@@ -308,7 +308,7 @@ EXPORT_SYMBOL(drm_atomic_helper_damage_iter_next);
  * 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,
+				     const struct drm_plane_state *state,
 				     struct drm_rect *rect)
 {
 	struct drm_atomic_helper_damage_iter iter;
diff --git a/include/drm/drm_damage_helper.h b/include/drm/drm_damage_helper.h
index effda42cce31..a58cbcd11276 100644
--- a/include/drm/drm_damage_helper.h
+++ b/include/drm/drm_damage_helper.h
@@ -78,7 +78,7 @@ 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,
+				     const struct drm_plane_state *state,
 				     struct drm_rect *rect);
 
 #endif
-- 
2.43.0