netdev - Re: [PATCH net-next v4 1/6] net: dsa: mv88e6xxx: support 2500base-x in SGMII IRQ handler

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Message-ID: <20190826151335.GA2168@lunn.ch>
Date:   Mon, 26 Aug 2019 17:13:35 +0200
From:   Andrew Lunn <andrew@...n.ch>
To:     Marek Behún <marek.behun@....cz>
Cc:     netdev@...r.kernel.org, Vivien Didelot <vivien.didelot@...il.com>,
        Florian Fainelli <f.fainelli@...il.com>,
        Vladimir Oltean <olteanv@...il.com>
Subject: Re: [PATCH net-next v4 1/6] net: dsa: mv88e6xxx: support 2500base-x
 in SGMII IRQ handler

On Mon, Aug 26, 2019 at 02:21:04PM +0200, Marek Behún wrote:
> The mv88e6390_serdes_irq_link_sgmii IRQ handler reads the SERDES PHY
> status register to determine speed, among other things. If cmode of the
> port is set to 2500base-x, though, the PHY still reports 1000 Mbps (the
> PHY register itself does not differentiate between 1000 Mbps and 2500
> Mbps - it thinks it is running at 1000 Mbps, although clock is 2.5x
> faster).
> Look at the cmode and set SPEED_2500 if cmode is set to 2500base-x.
> Also tell mv88e6xxx_port_setup_mac the PHY interface mode corresponding
> to current cmode in terms of phy_interface_t.
> 
> Signed-off-by: Marek Behún <marek.behun@....cz>

Reviewed-by: Andrew Lunn <andrew@...n.ch>

    Andrew