diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
index 8e9208095563..1e952e1bbbe8 100644
--- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
+++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-qp.c
@@ -3179,7 +3179,9 @@ static int dw_hdmi_connector_atomic_check(struct drm_connector *connector,
 			extcon_set_state_sync(hdmi->extcon, EXTCON_DISP_HDMI, true);
 		}
 
-		drm_scdc_readb(hdmi->ddc, SCDC_TMDS_CONFIG, &val);
+		val = 0;
+		if (dw_hdmi_support_scdc(hdmi, &connector->display_info))
+			drm_scdc_readb(hdmi->ddc, SCDC_TMDS_CONFIG, &val);
 		/* if plug out before hdmi bind, reset hdmi */
 		if (vmode->mtmdsclock >= 340000000 && vmode->mpixelclock <= 600000000 &&
 		    !(val & SCDC_TMDS_BIT_CLOCK_RATIO_BY_40) && !hdmi->force_kernel_output)