diff --git a/drivers/gpu/drm/rockchip/dw-dp.c b/drivers/gpu/drm/rockchip/dw-dp.c
index 3e6c4ffde472..9cab6397f2d1 100644
--- a/drivers/gpu/drm/rockchip/dw-dp.c
+++ b/drivers/gpu/drm/rockchip/dw-dp.c
@@ -786,7 +786,7 @@ static int _dw_dp_hdcp_enable(struct dw_dp *dp)
 	if (ret < 0)
 		return ret;
 
-	if (rev >= DP_DPCD_REV_12)
+	if (rev > DP_DPCD_REV_12)
 		regmap_update_bits(dp->regmap, DPTX_HDCPCFG, DPCD12PLUS, DPCD12PLUS);
 
 	regmap_update_bits(dp->regmap, DPTX_HDCPCFG, ENABLE_HDCP | ENABLE_HDCP_13,