diff --git a/drivers/gpu/drm/i915/intel_dp.c b/drivers/gpu/drm/i915/intel_dp.c
index 69cee9b0a08d..acd0c51f74d5 100644
--- a/drivers/gpu/drm/i915/intel_dp.c
+++ b/drivers/gpu/drm/i915/intel_dp.c
@@ -1524,8 +1524,8 @@ void intel_dp_compute_rate(struct intel_dp *intel_dp, int port_clock,
 	}
 }
 
-int intel_dp_compute_bpp(struct intel_dp *intel_dp,
-			 struct intel_crtc_state *pipe_config)
+static int intel_dp_compute_bpp(struct intel_dp *intel_dp,
+				struct intel_crtc_state *pipe_config)
 {
 	int bpp, bpc;