diff --git a/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c b/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
index 9c796ee4c303a9a9075b251f681bf14de2dbb9a4..c8b362cc2b95fd490029a9c0552ad9fbc5631d17 100644
--- a/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/dw_hdmi_qp-rockchip.c
@@ -82,7 +82,7 @@ static void dw_hdmi_qp_rockchip_encoder_enable(struct drm_encoder *encoder)
 		 * comment in rk_hdptx_phy_power_on() from
 		 * drivers/phy/rockchip/phy-rockchip-samsung-hdptx.c
 		 */
-		phy_set_bus_width(hdmi->phy, rate / 100);
+		phy_set_bus_width(hdmi->phy, div_u64(rate, 100));
 	}
 }