netdev - Re: [PATCH net-next] net: dsa: mv88e6xxx: support in-band signalling on SGMII ports with external PHYs

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Date:   Mon, 04 Mar 2019 10:52:57 -0800 (PST)
From:   David Miller <davem@...emloft.net>
To:     hkallweit1@...il.com
Cc:     vivien.didelot@...il.com, andrew@...n.ch, f.fainelli@...il.com,
        netdev@...r.kernel.org, linux@...linux.org.uk
Subject: Re: [PATCH net-next] net: dsa: mv88e6xxx: support in-band
 signalling on SGMII ports with external PHYs

From: Heiner Kallweit <hkallweit1@...il.com>
Date: Fri, 1 Mar 2019 20:41:00 +0100

> If an external PHY is connected via SGMII and uses in-band signalling
> then the auto-negotiated values aren't propagated to the port,
> resulting in a broken link. See discussion in [0]. This patch adds
> this propagation. We need to call mv88e6xxx_port_setup_mac(),
> therefore export it from chip.c.
> 
> Successfully tested on a ZII DTU with 88E6390 switch and an
> Aquantia AQCS109 PHY connected via SGMII to port 9.
> 
> [0] https://marc.info/?t=155130287200001&r=1&w=2
> 
> Signed-off-by: Heiner Kallweit <hkallweit1@...il.com>
> ---
> I consider this rather a missing feature than a bug. Therefore net-next.

Applied to net-next, thanks Heiner.