drm/i915/dsb: Skip DSB command buffer setup if we have no LUTs

If we have no LUTs to load there is no point in setting up
the DSB command buffer.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20230118163040.29808-9-ville.syrjala@linux.intel.com
Reviewed-by: Animesh Manna <animesh.manna@intel.com>

diff --git a/drivers/gpu/drm/i915/display/intel_color.c b/drivers/gpu/drm/i915/display/intel_color.c
index 55ac476972c2dde013ae767416345bb02a366ed1..a6dd0859823315126ceff7db4696472b7dba62c3 100644 (file)
--- a/drivers/gpu/drm/i915/display/intel_color.c
+++ b/drivers/gpu/drm/i915/display/intel_color.c
@@ -1383,6 +1383,9 @@ void intel_color_prepare_commit(struct intel_crtc_state *crtc_state)
        /* FIXME DSB has issues loading LUTs, disable it for now */
        return;
 
+       if (!crtc_state->pre_csc_lut && !crtc_state->post_csc_lut)
+               return;
+
        crtc_state->dsb = intel_dsb_prepare(crtc, 1024);
 }