diff --git a/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
index 4cc8ecaed250..723e7856232b 100644
--- a/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
+++ b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
@@ -707,6 +707,9 @@ static int rk3562_combphy_cfg(struct rockchip_combphy_priv *priv)
 	case 100000000:
 		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_clk_100m, true);
 		if (priv->mode == PHY_TYPE_PCIE) {
+			/* gate_tx_pck_sel length select work for L1SS */
+			rockchip_combphy_updatel(priv, GENMASK(7, 7), BIT(7), 0x1d << 2);
+
 			/* PLL KVCO tuning fine */
 			rockchip_combphy_updatel(priv, GENMASK(4, 2), 0x2 << 2, 0x20 << 2);