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Date:   Tue, 21 Jul 2020 08:38:24 +0530
From:   Sekhar Nori <nsekhar@...com>
To:     Grygorii Strashko <grygorii.strashko@...com>,
        Murali Karicheri <m-karicheri2@...com>,
        "David S. Miller" <davem@...emloft.net>,
        Santosh Shilimkar <ssantosh@...nel.org>
CC:     <netdev@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        Jakub Kicinski <kuba@...nel.org>,
        Rob Herring <robh+dt@...nel.org>, <devicetree@...r.kernel.org>,
        Oleksij Rempel <o.rempel@...gutronix.de>,
        Andrew Lunn <andrew@...n.ch>,
        Philippe Schenker <philippe.schenker@...adex.com>
Subject: Re: [PATCH] ARM: dts: keystone-k2g-evm: fix rgmii phy-mode for
 ksz9031 phy

Hi Santosh,

On 7/15/20 2:24 PM, Grygorii Strashko wrote:
> Since commit bcf3440c6dd7 ("net: phy: micrel: add phy-mode support for the
> KSZ9031 PHY") the networking is broken on keystone-k2g-evm board.
> 
> The above board have phy-mode = "rgmii-id" and it is worked before because
> KSZ9031 PHY started with default RGMII internal delays configuration (TX
> off, RX on 1.2 ns) and MAC provided TX delay by default.
> After above commit, the KSZ9031 PHY starts handling phy mode properly and
> enables both RX and TX delays, as result networking is become broken.
> 
> Fix it by switching to phy-mode = "rgmii-rxid" to reflect previous
> behavior.
> 
> Cc: Oleksij Rempel <o.rempel@...gutronix.de>
> Cc: Andrew Lunn <andrew@...n.ch>
> Cc: Philippe Schenker <philippe.schenker@...adex.com>
> Fixes: bcf3440c6dd7 ("net: phy: micrel: add phy-mode support for the KSZ9031 PHY")
> Signed-off-by: Grygorii Strashko <grygorii.strashko@...com>
> ---
> Fix for one more broken TI board with KSZ9031 PHY.

This is coming bit late, but its important to get into v5.8 since NFS
boot fails without this blocking all mainline testing for this platform.

Can we send this to ARM SoC for -rc7. If you are going to be busy this
week, I am happy to send a pull request on your behalf with your ack
included. Let me know.

Thanks,
Sekhar

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