diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index c9ca328d34e3..a99b92526b55 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -6362,7 +6362,7 @@ static bool is_freesync_video_mode(const struct drm_display_mode *mode,
 		return true;
 }
 
-struct dc_stream_state *
+static struct dc_stream_state *
 create_stream_for_sink(struct amdgpu_dm_connector *aconnector,
 		       const struct drm_display_mode *drm_mode,
 		       const struct dm_connector_state *dm_state,
@@ -10189,7 +10189,7 @@ static void set_freesync_fixed_config(struct dm_crtc_state *dm_new_crtc_state) {
 	dm_new_crtc_state->freesync_config.fixed_refresh_in_uhz = res;
 }
 
-int dm_update_crtc_state(struct amdgpu_display_manager *dm,
+static int dm_update_crtc_state(struct amdgpu_display_manager *dm,
 			 struct drm_atomic_state *state,
 			 struct drm_crtc *crtc,
 			 struct drm_crtc_state *old_crtc_state,
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
index 389b0cb37995..05573f073b21 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm_mst_types.c
@@ -213,7 +213,7 @@ static bool validate_dsc_caps_on_connector(struct amdgpu_dm_connector *aconnecto
 	return true;
 }
 
-bool retrieve_downstream_port_device(struct amdgpu_dm_connector *aconnector)
+static bool retrieve_downstream_port_device(struct amdgpu_dm_connector *aconnector)
 {
 	union dp_downstream_port_present ds_port_present;
 
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn10/rv1_clk_mgr_vbios_smu.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn10/rv1_clk_mgr_vbios_smu.c
index 06bab24d8e27..450eaead4f20 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn10/rv1_clk_mgr_vbios_smu.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn10/rv1_clk_mgr_vbios_smu.c
@@ -101,7 +101,8 @@ static uint32_t rv1_smu_wait_for_response(struct clk_mgr_internal *clk_mgr, unsi
 	return res_val;
 }
 
-int rv1_vbios_smu_send_msg_with_param(struct clk_mgr_internal *clk_mgr, unsigned int msg_id, unsigned int param)
+static int rv1_vbios_smu_send_msg_with_param(struct clk_mgr_internal *clk_mgr,
+		unsigned int msg_id, unsigned int param)
 {
 	uint32_t result;
 
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn316/dcn316_clk_mgr.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn316/dcn316_clk_mgr.c
index ffd3d5cb9871..02a59adff90d 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn316/dcn316_clk_mgr.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn316/dcn316_clk_mgr.c
@@ -485,7 +485,7 @@ static unsigned int find_clk_for_voltage(
 	return clock;
 }
 
-void dcn316_clk_mgr_helper_populate_bw_params(
+static void dcn316_clk_mgr_helper_populate_bw_params(
 		struct clk_mgr_internal *clk_mgr,
 		struct integrated_info *bios_info,
 		const DpmClocks_316_t *clock_table)
diff --git a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn316/dcn316_smu.c b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn316/dcn316_smu.c
index fd6497fd2dc5..128614dff108 100644
--- a/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn316/dcn316_smu.c
+++ b/drivers/gpu/drm/amd/display/dc/clk_mgr/dcn316/dcn316_smu.c
@@ -111,7 +111,7 @@ static uint32_t dcn316_smu_wait_for_response(struct clk_mgr_internal *clk_mgr, u
 	return res_val;
 }
 
-int dcn316_smu_send_msg_with_param(
+static int dcn316_smu_send_msg_with_param(
 		struct clk_mgr_internal *clk_mgr,
 		unsigned int msg_id, unsigned int param)
 {
diff --git a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
index 19b56f9acf84..29ab67f42d92 100644
--- a/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
+++ b/drivers/gpu/drm/amd/display/dc/core/dc_resource.c
@@ -1622,7 +1622,7 @@ bool dc_add_all_planes_for_stream(
 	return add_all_planes_for_stream(dc, stream, &set, 1, context);
 }
 
-bool is_timing_changed(struct dc_stream_state *cur_stream,
+static bool is_timing_changed(struct dc_stream_state *cur_stream,
 		       struct dc_stream_state *new_stream)
 {
 	if (cur_stream == NULL)
diff --git a/drivers/gpu/drm/amd/display/dc/irq/dcn20/irq_service_dcn20.c b/drivers/gpu/drm/amd/display/dc/irq/dcn20/irq_service_dcn20.c
index c4b067d01895..93c31111500b 100644
--- a/drivers/gpu/drm/amd/display/dc/irq/dcn20/irq_service_dcn20.c
+++ b/drivers/gpu/drm/amd/display/dc/irq/dcn20/irq_service_dcn20.c
@@ -40,7 +40,7 @@
 
 #include "ivsrcid/dcn/irqsrcs_dcn_1_0.h"
 
-enum dc_irq_source to_dal_irq_source_dcn20(
+static enum dc_irq_source to_dal_irq_source_dcn20(
 		struct irq_service *irq_service,
 		uint32_t src_id,
 		uint32_t ext_id)
diff --git a/drivers/gpu/drm/amd/display/dc/irq/dcn30/irq_service_dcn30.c b/drivers/gpu/drm/amd/display/dc/irq/dcn30/irq_service_dcn30.c
index 0b68c08fac3f..ac0c6a62d17b 100644
--- a/drivers/gpu/drm/amd/display/dc/irq/dcn30/irq_service_dcn30.c
+++ b/drivers/gpu/drm/amd/display/dc/irq/dcn30/irq_service_dcn30.c
@@ -47,7 +47,7 @@
 
 #include "ivsrcid/dcn/irqsrcs_dcn_1_0.h"
 
-enum dc_irq_source to_dal_irq_source_dcn30(
+static enum dc_irq_source to_dal_irq_source_dcn30(
 		struct irq_service *irq_service,
 		uint32_t src_id,
 		uint32_t ext_id)
