netdev - Re: [PATCH v2] net: mtk_sgmii: implement mtk_pcs

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Message-ID: <Y1JJEtvra2F3JGQS@shell.armlinux.org.uk>
Date:   Fri, 21 Oct 2022 08:24:02 +0100
From:   "Russell King (Oracle)" <linux@...linux.org.uk>
To:     Frank Wunderlich <frank-w@...lic-files.de>
Cc:     Frank Wunderlich <linux@...web.de>,
        linux-mediatek@...ts.infradead.org,
        Alexander Couzens <lynxis@...0.eu>,
        Felix Fietkau <nbd@....name>, John Crispin <john@...ozen.org>,
        Sean Wang <sean.wang@...iatek.com>,
        Mark Lee <Mark-MC.Lee@...iatek.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Matthias Brugger <matthias.bgg@...il.com>,
        netdev@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] net: mtk_sgmii: implement mtk_pcs_ops

On Fri, Oct 21, 2022 at 08:04:51AM +0200, Frank Wunderlich wrote:
> On my board (bpi-r3) we have no autoneg on the gmacs. We have a switch (mt7531) with fixed-link on the first and a sfp-cage on the other. Second mac gets speed-setting (1000base-X or 2500base-X) from sfp eeprom, but no advertisement from the "other end". Imho it is always full duplex.

If it's a fixed link, then this function you're adding won't be called.
It's only called for in-band mode which is exclusive with fixed-link
mode.

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