6.6-stable review patch. If anyone has any objections, please let me know.
------------------
From: Mengyuan Lou <mengyuanlou@xxxxxxxxxxxxx>
commit f2916c83d746eb99f50f42c15cf4c47c2ea5f3b3 upstream.
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@xxxxxxxxxxxxx>
Cc: stable@xxxxxxxxxxxxxxx # 6.3+
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>
Signed-off-by: mengyuanlou <mengyuanlou@xxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/net/ethernet/wangxun/ngbe/ngbe_mdio.c | 6 +++++-
1 file changed, 5 insertions(+), 1 deletion(-)
--- 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;
