Re: [PATCH 2/8] net: ethernet: stmmac: update to support all PHY config for stm32mp157c.

Sorry, I've misunderstood your question ;-)

And you spoke about :

case PHY_INTERFACE_MODE_RGMII:
case PHY_INTERFACE_MODE_RGMII_ID:
case PHY_INTERFACE_MODE_RGMII_RXID:
case PHY_INTERFACE_MODE_RGMII_TXID:

So in my setup I've only RGMII interface, so I've never tested 3 others 
interfaces (_ID, _RXID, _TXID).

So do I need to add cases in my driver ?

Yes. They all indicate the MAC should be using RGMII.

This appears to be an old issue, but now would be a good time to fix
it.

     Andrew