diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 2b8f43e21174..08e834dbc42a 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -1396,6 +1396,7 @@ bool intel_dp_has_dsc(const struct intel_connector *connector)
 	return true;
 }
 
+static
 bool intel_dp_can_join(struct intel_display *display,
 		       int num_joined_pipes)
 {
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index ff527b351de0..cbd7fcd3789f 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -222,8 +222,6 @@ int intel_dp_compute_config_late(struct intel_encoder *encoder,
 int intel_dp_sdp_min_guardband(const struct intel_crtc_state *crtc_state,
 			       bool assume_all_enabled);
 int intel_dp_max_hdisplay_per_pipe(struct intel_display *display);
-bool intel_dp_can_join(struct intel_display *display,
-		       int num_joined_pipes);
 bool intel_dp_dotclk_valid(struct intel_display *display,
 			   int target_clock,
 			   int htotal,