diff --git a/include/dt-bindings/sound/sc7180-lpass.h b/include/dt-bindings/sound/sc7180-lpass.h
index 7d988f6346a5..56ecaafd2dc6 100644
--- a/include/dt-bindings/sound/sc7180-lpass.h
+++ b/include/dt-bindings/sound/sc7180-lpass.h
@@ -4,6 +4,7 @@
 
 #define MI2S_PRIMARY	0
 #define MI2S_SECONDARY	1
+#define LPASS_DP_RX	2
 
 #define LPASS_MCLK0	0