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: a1cf597b99a7 ("net: ngbe: Add ngbe mdio bus driver.")
Signed-off-by: Mengyuan Lou <mengyuanlou@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx
Reviewed-by: Jacob Keller <jacob.e.keller@xxxxxxxxx>
Link: https://patch.msgid.link/E6759CF1387CF84C+20240820030425.93003-1-mengyuanlou@xxxxxxxxxxxxx
Signed-off-by: Paolo Abeni <pabeni@xxxxxxxxxx>
(cherry picked from commit f2916c83d746eb99f50f42c15cf4c47c2ea5f3b3)
Signed-off-by: mengyuanlou <mengyuanlou@xxxxxxxxxxxxx>
---
drivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c b/drivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c
index 591f5b7b6da6..5007addd119a 100644
--- a/drivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c
+++ b/drivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c
@@ -215,10 +215,14 @@ int ngbe_phy_connect(struct wx *wx)
{
int ret;
+ /* 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.
+ */
ret = phy_connect_direct(wx->netdev,
wx->phydev,
ngbe_handle_link_change,
- PHY_INTERFACE_MODE_RGMII_ID);
+ PHY_INTERFACE_MODE_RGMII_RXID);
if (ret) {
wx_err(wx, "PHY connect failed.\n");
return ret;
--
2.25.1
