diff --git a/drivers/gpu/drm/amd/display/include/signal_types.h b/drivers/gpu/drm/amd/display/include/signal_types.h
index 03476b142d8e4c5b34c1fb8691f23c1f5c6f0e05..f56d2891475ff1c6045568aae4e8e878cbd17cf9 100644
--- a/drivers/gpu/drm/amd/display/include/signal_types.h
+++ b/drivers/gpu/drm/amd/display/include/signal_types.h
@@ -102,4 +102,9 @@ static inline bool dc_is_audio_capable_signal(enum signal_type signal)
 		dc_is_hdmi_signal(signal));
 }
 
+static inline bool dc_is_virtual_signal(enum signal_type signal)
+{
+	return (signal == SIGNAL_TYPE_VIRTUAL);
+}
+
 #endif