Re: [PATCH net-next] net: phy: marvell: Ensure SGMII auto-negotiation is enabled for 88E1111

On Fri, Feb 12, 2021 at 06:26:29PM -0600, Robert Hancock wrote:

When 88E111 is operating in SGMII mode, auto-negotiation should be enabled

88E1111.

on the SGMII side so that the link will come up properly with PCSes which
normally have auto-negotiation enabled. This is normally the case when the
PHY defaults to SGMII mode at power-up, however if we switched it from some
other mode like 1000BaseX, as may happen in some SFP module situations,
it may not be.

Do you actually have a module where this applies?

I have modules that do come up in 1000base-X mode, but do switch to
SGMII mode with AN just fine. So I'm wondering what the difference is.

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