diff --git a/drivers/phy/rockchip/phy-rockchip-inno-hdmi-phy.c b/drivers/phy/rockchip/phy-rockchip-inno-hdmi-phy.c
index 0865066ab163..7a991780af88 100644
--- a/drivers/phy/rockchip/phy-rockchip-inno-hdmi-phy.c
+++ b/drivers/phy/rockchip/phy-rockchip-inno-hdmi-phy.c
@@ -1045,6 +1045,8 @@ inno_hdmi_rk3228_phy_pll_recalc_rate(struct inno_hdmi_phy *inno,
 		do_div(vco, nd * 5);
 	} else {
 		no_a = inno_read(inno, 0xe4) & 0x1f;
+		if (!no_a)
+			no_a = 1;
 		no_b = ((inno_read(inno, 0xe4) >> 5) & 0x3) + 2;
 		no_d = inno_read(inno, 0xe5) & 0x1f;