Re: [PATCH 3/3] arm64: dts: rockchip: add dts for Ariaboard Photonicat RK3568

Andrew Lunn
2024-09-05T12:54:00Z

On Thu, Sep 05, 2024 at 07:17:03PM +0800, Junhao Xie wrote:
> On 2024/9/5 01:25, Andrew Lunn wrote:
> >> +&gmac1 {
> [...]
> > This has been discussed a few times. You should be using phy-mode
> > rgmii-id.
>
> After I changed phy-mode to rgmii-id, it seemed to work,
> but it didn't transmit any data.
> Maybe I made a mistake or should I continue to use phy-mode rgmii?

How did you change the rx_delay and tx_delay?

In general, we want the PHY to add the delay, not the MAC. Most boards
in Linux do that. But boards using the motocomm PHY have got into a
cargo cult copy/paste of using the MAC to add the delays.

Andrew