net: ngbe: Fix phy mode set to external phy

The MAC only has add the TX delay and it can not be modified.
MAC and PHY are both set the TX delay cause transmission problems.
So just disable TX delay in PHY, when use rgmii to attach to
external phy, set PHY_INTERFACE_MODE_RGMII_RXID to phy drivers.
And it is does not matter to internal phy.

Fixes: bc2426d74aa3 ("net: ngbe: convert phylib to phylink")
Signed-off-by: Mengyuan Lou <mengyuanlou@net-swift.com>
Cc: stable@vger.kernel.org # 6.3+
Reviewed-by: Jacob Keller <jacob.e.keller@intel.com>
Link: https://patch.msgid.link/E6759CF1387CF84C+20240820030425.93003-1-mengyuanlou@net-swift.com
Signed-off-by: Paolo Abeni <pabeni@redhat.com>

diff --git a/drivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c b/drivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c
index ec54b18..a5e9b77 100644 (file)
--- a/drivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c
@@ -124,8 +124,12 @@ static int ngbe_phylink_init(struct wx *wx)
                                   MAC_SYM_PAUSE | MAC_ASYM_PAUSE;
        config->mac_managed_pm = true;
 
-       phy_mode = PHY_INTERFACE_MODE_RGMII_ID;
-       __set_bit(PHY_INTERFACE_MODE_RGMII_ID, config->supported_interfaces);
+       /* The MAC only has add the Tx delay and it can not be modified.
+        * So just disable TX delay in PHY, and it is does not matter to
+        * internal phy.
+        */
+       phy_mode = PHY_INTERFACE_MODE_RGMII_RXID;
+       __set_bit(PHY_INTERFACE_MODE_RGMII_RXID, config->supported_interfaces);
 
        phylink = phylink_create(config, NULL, phy_mode, &ngbe_mac_ops);
        if (IS_ERR(phylink))