Re: [PATCH net-next v7 2/7] net: pcs: xpcs: re-initiate clause 37 Auto-negotiation

Choong Yong Liang
2025-02-20T02:12:25Z

On 6/2/2025 11:30 pm, Russell King (Oracle) wrote:
> Also, if the reset is required, what happens if we're already using
> SGMII, but AN has been disabled temporarily and is then re-enabled?
> Is a reset required?
>

Hi Russell,

When we use SGMII with XPCS, the AN is disabled and then re-enabled. This
process does not involve any PCS configuration, so a reset is not required.

I tested it with stmmac (dwmac5) + xpcs + Marvell (88E1510) PHY, and it
works fine when AN is temporarily disabled and then re-enabled without a reset.