diff --git a/drivers/net/dsa/mt7530.c b/drivers/net/dsa/mt7530.c
index c355824ddb81..265620a81f9f 100644
--- a/drivers/net/dsa/mt7530.c
+++ b/drivers/net/dsa/mt7530.c
@@ -1952,13 +1952,7 @@ static void mt7531_sgmii_validate(struct mt7530_priv *priv, int port,
 	/* Port5 supports ethier RGMII or SGMII.
 	 * Port6 supports SGMII only.
 	 */
-	switch (port) {
-	case 5:
-		if (mt7531_is_rgmii_port(priv, port))
-			break;
-		fallthrough;
-	case 6:
-		phylink_set(supported, 1000baseX_Full);
+	if (port == 6) {
 		phylink_set(supported, 2500baseX_Full);
 		phylink_set(supported, 2500baseT_Full);
 	}
@@ -2315,8 +2309,6 @@ static void
 mt7530_mac_port_validate(struct dsa_switch *ds, int port,
 			 unsigned long *supported)
 {
-	if (port == 5)
-		phylink_set(supported, 1000baseX_Full);
 }
 
 static void mt7531_mac_port_validate(struct dsa_switch *ds, int port,
@@ -2353,8 +2345,10 @@ mt753x_phylink_validate(struct dsa_switch *ds, int port,
 	}
 
 	/* This switch only supports 1G full-duplex. */
-	if (state->interface != PHY_INTERFACE_MODE_MII)
+	if (state->interface != PHY_INTERFACE_MODE_MII) {
 		phylink_set(mask, 1000baseT_Full);
+		phylink_set(mask, 1000baseX_Full);
+	}
 
 	priv->info->mac_port_validate(ds, port, mask);