diff --git a/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
index d1a89be9d333..866b730cc521 100644
--- a/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
+++ b/drivers/phy/rockchip/phy-rockchip-naneng-combphy.c
@@ -1487,6 +1487,10 @@ static int rv1126b_combphy_cfg(struct rockchip_combphy_priv *priv)
 		/* Set Rx squelch input filler bandwidth */
 		writel(0x0e, priv->mmio + (0x14 << 2));
 
+		/* Set Full Txswing and Txmargin 1200mV and -6dB De-emphasis */
+		regmap_write(priv->phy_grf, 0x1800c, GENMASK(18, 16) | 0x0007);
+		regmap_write(priv->phy_grf, 0x18004, GENMASK(26, 21) | 0x0100);
+
 		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_sel_usb, true);
 		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_txcomp_sel, false);
 		rockchip_combphy_param_write(priv->phy_grf, &cfg->pipe_txelec_sel, false);