Re: [RFC PATCH net-next 1/1] net: phy: Add capability to enable/disable 2.5G/5G/10G AN in ethtool

[Andrew Lunn]

On Mon, Oct 14, 2024 at 02:06:03PM +0800, Sky Huang wrote:
> From: "SkyLake.Huang" <skylake.huang@xxxxxxxxxxxx>
> 
> For phy loopback test, we need to disable AN. In this way,
> users can disable/enable phy AN more conveniently.

Please take a look at:

https://lore.kernel.org/netdev/20241013202430.93851-1-gerhard@xxxxxxxxxxxxxxxxxxxxx/T/

We need a good understanding of how 802.3 expects loopback to be used,
and a commit message based on what 802.3 says. Our current
understanding is that 1G and above requires auto-neg for correct
operation, so we don't want to allow autoneg to be disabled in normal
operation. It could be we need to special case loopback somehow.

	Andrew