diff --git a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
index 210466b2d863..0ef2f4d9d8bf 100644
--- a/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
+++ b/drivers/gpu/drm/amd/display/dc/dce/dce_link_encoder.c
@@ -1197,7 +1197,7 @@ void dce110_link_encoder_enable_dp_mst_output(
 
 #if defined(CONFIG_DRM_AMD_DC_SI)
 /* enables DP PHY output */
-void dce60_link_encoder_enable_dp_output(
+static void dce60_link_encoder_enable_dp_output(
 	struct link_encoder *enc,
 	const struct dc_link_settings *link_settings,
 	enum clock_source_id clock_source)
@@ -1236,7 +1236,7 @@ void dce60_link_encoder_enable_dp_output(
 }
 
 /* enables DP PHY output in MST mode */
-void dce60_link_encoder_enable_dp_mst_output(
+static void dce60_link_encoder_enable_dp_mst_output(
 	struct link_encoder *enc,
 	const struct dc_link_settings *link_settings,
 	enum clock_source_id clock_source)
@@ -1426,7 +1426,7 @@ void dce110_link_encoder_dp_set_phy_pattern(
 
 #if defined(CONFIG_DRM_AMD_DC_SI)
 /* set DP PHY test and training patterns */
-void dce60_link_encoder_dp_set_phy_pattern(
+static void dce60_link_encoder_dp_set_phy_pattern(
 	struct link_encoder *enc,
 	const struct encoder_set_dp_phy_pattern_param *param)
 {