diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c
index 60652ebbdf61..4071c9da1065 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.c
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c
@@ -631,6 +631,12 @@ intel_dp_create_fake_mst_encoders(struct intel_digital_port *intel_dig_port)
 	return true;
 }
 
+int
+intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port)
+{
+	return intel_dig_port->dp.active_mst_links;
+}
+
 int
 intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_base_id)
 {
diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.h b/drivers/gpu/drm/i915/display/intel_dp_mst.h
index 6754c211205a..f660ad80db04 100644
--- a/drivers/gpu/drm/i915/display/intel_dp_mst.h
+++ b/drivers/gpu/drm/i915/display/intel_dp_mst.h
@@ -6,15 +6,10 @@
 #ifndef __INTEL_DP_MST_H__
 #define __INTEL_DP_MST_H__
 
-#include "intel_drv.h"
+struct intel_digital_port;
 
 int intel_dp_mst_encoder_init(struct intel_digital_port *intel_dig_port, int conn_id);
 void intel_dp_mst_encoder_cleanup(struct intel_digital_port *intel_dig_port);
-static inline int
-intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port)
-{
-	return intel_dig_port->dp.active_mst_links;
-}
-
+int intel_dp_mst_encoder_active_links(struct intel_digital_port *intel_dig_port);
 
 #endif /* __INTEL_DP_MST_H__ */