drm/i915/wm: clear the plane ddb_y entries on plane disable

The UV/Y plane DDB entriess are never cleared on
sk_wm_plane_disable_noatomic() and can leave stale DDB state
for NV12 planes on pre-Gen11 devices

Fixes: d34b59d5ba41 ("drm/i915: Add skl_wm_plane_disable_noatomic()")
Assisted-by: Copilot:claude-sonnet-4.6
Signed-off-by: Vinod Govindapillai <vinod.govindapillai@intel.com>
Reviewed-by: Suraj Kandpal <suraj.kandpal@intel.com>
Link: https://patch.msgid.link/20260615203355.218578-2-vinod.govindapillai@intel.com
(cherry picked from commit 60f68a6ba298fd1e971a2d91576304bee89a16fc)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>

diff --git a/drivers/gpu/drm/i915/display/skl_watermark.c b/drivers/gpu/drm/i915/display/skl_watermark.c
index 5a3677ea25b071f16f32479043f3b9e857577eb3..a4ce21d4c0245aeed558d0e4990e6f6ab1c92c6d 100644 (file)
--- a/drivers/gpu/drm/i915/display/skl_watermark.c
+++ b/drivers/gpu/drm/i915/display/skl_watermark.c
@@ -3856,7 +3856,7 @@ void skl_wm_plane_disable_noatomic(struct intel_crtc *crtc,
                return;
 
        skl_ddb_entry_init(&crtc_state->wm.skl.plane_ddb[plane->id], 0, 0);
-       skl_ddb_entry_init(&crtc_state->wm.skl.plane_ddb[plane->id], 0, 0);
+       skl_ddb_entry_init(&crtc_state->wm.skl.plane_ddb_y[plane->id], 0, 0);
 
        crtc_state->wm.skl.plane_min_ddb[plane->id] = 0;
        crtc_state->wm.skl.plane_interim_ddb[plane->id] = 0;