diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
index 6e44013b20cc..c61d702fe83a 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_main.c
@@ -1036,7 +1036,7 @@ static int stmmac_init_phy(struct net_device *dev)
 static int stmmac_phy_setup(struct stmmac_priv *priv)
 {
 	struct fwnode_handle *fwnode = of_fwnode_handle(priv->plat->phylink_node);
-	int mode = priv->plat->interface;
+	int mode = priv->plat->phy_interface;
 	struct phylink *phylink;
 
 	priv->phylink_config.dev = &priv->dev->dev;
diff --git a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
index 5de754a9fae9..170c3a052b14 100644
--- a/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
+++ b/drivers/net/ethernet/stmicro/stmmac/stmmac_platform.c
@@ -358,6 +358,32 @@ static int stmmac_dt_phy(struct plat_stmmacenet_data *plat,
 	return 0;
 }
 
+/**
+ * stmmac_of_get_mac_mode - retrieves the interface of the MAC
+ * @np - device-tree node
+ * Description:
+ * Similar to `of_get_phy_mode()`, this function will retrieve (from
+ * the device-tree) the interface mode on the MAC side. This assumes
+ * that there is mode converter in-between the MAC & PHY
+ * (e.g. GMII-to-RGMII).
+ */
+static int stmmac_of_get_mac_mode(struct device_node *np)
+{
+	const char *pm;
+	int err, i;
+
+	err = of_property_read_string(np, "mac-mode", &pm);
+	if (err < 0)
+		return err;
+
+	for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++) {
+		if (!strcasecmp(pm, phy_modes(i)))
+			return i;
+	}
+
+	return -ENODEV;
+}
+
 /**
  * stmmac_probe_config_dt - parse device-tree driver parameters
  * @pdev: platform_device structure
@@ -386,7 +412,13 @@ stmmac_probe_config_dt(struct platform_device *pdev, const char **mac)
 		*mac = NULL;
 	}
 
-	plat->interface = of_get_phy_mode(np);
+	plat->phy_interface = of_get_phy_mode(np);
+	if (plat->phy_interface < 0)
+		return ERR_PTR(plat->phy_interface);
+
+	plat->interface = stmmac_of_get_mac_mode(np);
+	if (plat->interface < 0)
+		plat->interface = plat->phy_interface;
 
 	/* Some wrapper drivers still rely on phy_node. Let's save it while
 	 * they are not converted to phylink. */
diff --git a/include/linux/stmmac.h b/include/linux/stmmac.h
index 7ad7ae35cf88..dc60d03c4b60 100644
--- a/include/linux/stmmac.h
+++ b/include/linux/stmmac.h
@@ -131,6 +131,7 @@ struct plat_stmmacenet_data {
 	int bus_id;
 	int phy_addr;
 	int interface;
+	int phy_interface;
 	struct stmmac_mdio_bus_data *mdio_bus_data;
 	struct device_node *phy_node;
 	struct device_node *phylink_node;