Hello Andrew, Peter, On 7/28/21 10:37 PM, Andrew Lunn wrote: >> Generally all rockchip boards use this value instead of the rgmii_id, >> I imagine because it's more consistent to tune here than the hit or >> miss support of the phy drivers. > > Most PHY drivers actually implement it correctly, since by default, > most systems get the PHY to do the delays. > > But if most Rockchip boards do it this way, there is a lot to be said > for consistence, so this is fine by me. I have tested a dts without the delays and with phy-mode = "rgmii-id" and it seems to work just fine. Although consistency with other Rockchip boards is something one should consider, I think I'll go along the "rgmii-id" path since this seems to be a more general convention. Thanks for your comments, I'll submit a v2. Regards, Michael