netdev - Re: net: phylink: dsa: mv88e6xxx: flaky link detection on switch ports with internal PHYs

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Message-ID: <20190122202834.GB12052@lunn.ch>
Date:   Tue, 22 Jan 2019 21:28:34 +0100
From:   Andrew Lunn <andrew@...n.ch>
To:     John David Anglin <dave.anglin@...l.net>
Cc:     Russell King <linux@....linux.org.uk>,
        Vivien Didelot <vivien.didelot@...oirfairelinux.com>,
        Florian Fainelli <f.fainelli@...il.com>, netdev@...r.kernel.org
Subject: Re: net: phylink: dsa: mv88e6xxx: flaky link detection on switch
 ports with internal PHYs

On Tue, Jan 22, 2019 at 02:16:09PM -0500, John David Anglin wrote:
> I've been hacking on a espressobin board to try to improve ptp support,
> etc.  However, I have
> a big problem with link detection on the wan, lan0 and lan1 ports.
> 
> I have a standard bridge configuration using systemd-networkd. 

Hi John

Does it make a difference if you do it by hand? Bring up the master
interface, wan, lan0, lan1, add any bridge you need, etc.

> From power on, none of the wan, lan0, lan1 or br0 achieve link
> (LOWER_UP). 

Is the master interface up? What does ip link show give?

   Andrew