[PATCH net-next v3 0/5] net: stmmac: Add support for Allwinner A733 GMAC210

[Andrew Lunn]

>  * Unstable EEE/LPI: If the device stays in LPI mode long enough, the
>    link sometimes (but not always) goes down, coming back up when the
>    device exits LPI mode. This is apparently due to the PHY; the vendor
>    driver disables this feature. The solution is to use genphy with the
>    eee-broken-* DT properties or wait for the upcoming mainline driver:
>    https://lore.kernel.org/all/MN0PR19MB609154F210DF84DCB29D3696ACC62@MN0PR19MB6091.namprd19.prod.outlook.com

Looking at this code, it totally ignores the interface mode. So you
have no idea what RGMII delays it is adding. When this driver gets
fixed before being merged, your DT fragment will likely break.

       Andrew