diff --git a/drivers/gpu/drm/amd/display/dc/optc/dcn401/dcn401_optc.c b/drivers/gpu/drm/amd/display/dc/optc/dcn401/dcn401_optc.c
index a5d6a7dca554..27a9ec55d53e 100644
--- a/drivers/gpu/drm/amd/display/dc/optc/dcn401/dcn401_optc.c
+++ b/drivers/gpu/drm/amd/display/dc/optc/dcn401/dcn401_optc.c
@@ -226,6 +226,11 @@ static bool optc401_disable_crtc(struct timing_generator *optc)
 	REG_UPDATE(CONTROL,
 			VTG0_ENABLE, 0);
 
+	// wait until CRTC_CURRENT_MASTER_EN_STATE == 0
+	REG_WAIT(OTG_CONTROL,
+			 OTG_CURRENT_MASTER_EN_STATE,
+			 0, 10, 15000);
+
 	/* CRTC disabled, so disable  clock. */
 	REG_WAIT(OTG_CLOCK_CONTROL,
 			OTG_BUSY, 0,