drm/i915: Fix SKL sprite disable double buffer register update

Write the PLANE_SURF register instead of PLANE_CTL to arm the double
buffer regisrter update.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 2 insertions, 2 deletions

diff --git a/drivers/gpu/drm/i915/intel_sprite.c b/drivers/gpu/drm/i915/intel_sprite.c
index a4c9c66d7e79..0f00209bb220 100644
--- a/drivers/gpu/drm/i915/intel_sprite.c
+++ b/drivers/gpu/drm/i915/intel_sprite.c
@@ -301,8 +301,8 @@ skl_disable_plane(struct drm_plane *drm_plane, struct drm_crtc *crtc)
         I915_WRITE(PLANE_CTL(pipe, plane), 0);
 
         /* Activate double buffered register update */
-        I915_WRITE(PLANE_CTL(pipe, plane), 0);
-        POSTING_READ(PLANE_CTL(pipe, plane));
+        I915_WRITE(PLANE_SURF(pipe, plane), 0);
+        POSTING_READ(PLANE_SURF(pipe, plane));
 
         intel_update_sprite_watermarks(drm_plane, crtc, 0, 0, 0, false, false);
 }