--- a/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-uDPU.dts
@@ -145,7 +145,7 @@
 
 &eth0 {
 	status = "okay";
-	phy-mode = "sgmii";
+	phy-mode = "2500base-x";
 	managed = "in-band-status";
 	phys = <&comphy1 0>;
 	sfp = <&sfp_eth0>;
@@ -153,7 +153,7 @@
 
 &eth1 {
 	status = "okay";
-	phy-mode = "sgmii";
+	phy-mode = "2500base-x";
 	managed = "in-band-status";
 	phys = <&comphy0 1>;
 	sfp = <&sfp_eth1>;