diff --git a/drivers/gpu/drm/i915/intel_dpll_mgr.c b/drivers/gpu/drm/i915/intel_dpll_mgr.c
index 8e669b6254ae721ce4cda32e17298cf091ed6d4c..2f7b0e64f6284553ec151f00605dab2b94908003 100644
--- a/drivers/gpu/drm/i915/intel_dpll_mgr.c
+++ b/drivers/gpu/drm/i915/intel_dpll_mgr.c
@@ -2292,8 +2292,9 @@ static bool cnl_ddi_hdmi_pll_dividers(struct intel_crtc *crtc,
 	return true;
 }
 
-bool cnl_ddi_dp_set_dpll_hw_state(int clock,
-				  struct intel_dpll_hw_state *dpll_hw_state)
+static bool
+cnl_ddi_dp_set_dpll_hw_state(int clock,
+			     struct intel_dpll_hw_state *dpll_hw_state)
 {
 	uint32_t cfgcr0;