Re: mv88e6xxx: 2500base-x inband AN is broken on Amethyst? what to do?

On Wed, Jan 13, 2021 at 10:37:29PM +0100, Marek Behún wrote:

On Wed, 13 Jan 2021 21:21:25 +0000
Russell King - ARM Linux admin [off-list ref] wrote:

quoted

One thing that I don't know is whether the GPON SFP ONT modules that
use 2500base-x will still function with AN disabled - although I have
the modules, it appeared that they both needed a connection to the ONU
to switch from 1000base-x to 2500base-x on the host side - and as I
don't have an ONU I can test with, I have no way to check their
behaviour.

We have an ISP here in Prague who is willing to lend us some GPON
ONU devices to get GPON SFP modules work on Turris. I will ask him if he
has one capable of 2.5g and try to borrow it.

I know the Huawei MA5671A and the Nokia 3FE46541AA are - see the quirks
table in sfp-bus.c ! They come from an ISP on the American continent
who really really wanted these modules to link at 2.5Gbps.

-- 
RMK's Patch system: https://www.armlinux.org.uk/developer/patches/
FTTP is here! 40Mbps down 10Mbps up. Decent connectivity at last!