diff --git a/drivers/gpu/drm/i915/display/intel_casf.c b/drivers/gpu/drm/i915/display/intel_casf.c
index f777aae3fc57..21e84a4f9ff5 100644
--- a/drivers/gpu/drm/i915/display/intel_casf.c
+++ b/drivers/gpu/drm/i915/display/intel_casf.c
@@ -61,10 +61,10 @@ const u16 filtercoeff_3[] = {
 	FILTER_COEFF_0_125,
 };
 
-static void intel_casf_filter_lut_load(struct intel_crtc *crtc,
-				       const struct intel_crtc_state *crtc_state)
+static void intel_casf_filter_lut_load(const struct intel_crtc_state *crtc_state)
 {
 	struct intel_display *display = to_intel_display(crtc_state);
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 	int i;
 
 	intel_de_write(display, SHRPLUT_INDEX(crtc->pipe),
@@ -270,7 +270,7 @@ void intel_casf_enable(const struct intel_crtc_state *crtc_state)
 	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
 	u32 sharpness_ctl;
 
-	intel_casf_filter_lut_load(crtc, crtc_state);
+	intel_casf_filter_lut_load(crtc_state);
 
 	intel_casf_write_coeff(crtc_state);