Re: [PATCH net-next 3/3] net: phy: dp83869: Support 1000Base-X SFP modules

+static int dp83869_port_configure_serdes(struct phy_port *port, bool enable,
+					 phy_interface_t interface)
+{
+	struct phy_device *phydev = port_phydev(port);
+	struct dp83869_private *dp83869;
+	int ret;
+
+	if (!enable)
+		return 0;
+
+	dp83869 = phydev->priv;
+
+	switch (interface) {
+	case PHY_INTERFACE_MODE_1000BASEX:
+		dp83869->mode = DP83869_RGMII_1000_BASE;
+		break;
+	default:
+		phydev_err(phydev, "Incompatible SFP module inserted\n");
+		return -EINVAL;
+	}

There is also DP83869_RGMII_SGMII_BRIDGE. Can this be used with the
SERDES? Copper SFPs often want SGMII.

	Andrew