[PATCH] drm/i915/display: Handle struct drm_plane_state.ignore_damage_clips

[Thomas Zimmermann <tzimmermann@suse.de>]

Git commit 35ed38d58257 ("drm: Allow drivers to indicate the damage
helpers to ignore damage clips") introduced ignore_damage_clips to
selectively ignore damage clipping in certain framebuffer changes. The
mode-setting pipeline can disabled damage clippings for an atomic commit
by setting ignore_damage_clips in struct drm_plane_state. The atomic
commit will then do a full display update.

Although the i915 driver does not modify the flag, DRM's damage iterator
will soon rely on it. Calling drm_atomic_helper_check_plane_damage() right
before drm_atomic_helper_damage_merged() guarantees that it has the correct
state. The i915 driver does not do this elsewhere so far.

Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
Reviewed-by: Javier Martinez Canillas <javierm@redhat.com>
---
Taken with minor updates to the commit description from the series at

  https://lore.kernel.org/dri-devel/20260610152505.260172-1-tzimmermann@suse.de/
---
 drivers/gpu/drm/i915/display/intel_psr.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index 92af21d823a3..5a155f60110f 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -2949,6 +2949,9 @@ int intel_psr2_sel_fetch_update(struct intel_atomic_state *state,
 		src = drm_plane_state_src(&new_plane_state->uapi);
 		drm_rect_fp_to_int(&src, &src);
 
+		/* Prepare plane-damage state before using it */
+		drm_atomic_helper_check_plane_damage(&state->base, &new_plane_state->uapi);
+
 		if (!drm_atomic_helper_damage_merged(&old_plane_state->uapi,
 						     &new_plane_state->uapi, &damaged_area))
 			continue;
-- 
2.54.0