linux-kernel - Re: [PATCH] ARM: dts: imx6qdl-sabresd: change phy-mode to use rgmii-id

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Date:   Fri, 22 Mar 2019 11:20:44 +0100
From:   Michal Vokáč <michal.vokac@...ft.com>
To:     Fabio Estevam <festevam@...il.com>, Shawn Guo <shawnguo@...nel.org>
Cc:     Abel Vesa <abel.vesa@....com>,
        Steve Twiss <stwiss.opensource@...semi.com>,
        Andrew Lunn <andrew@...n.ch>, Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        dl-linux-imx <linux-imx@....com>,
        DEVICETREE <devicetree@...r.kernel.org>,
        LINUX-ARM-KERNEL <linux-arm-kernel@...ts.infradead.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Support Opensource <Support.Opensource@...semi.com>
Subject: Re: [PATCH] ARM: dts: imx6qdl-sabresd: change phy-mode to use
 rgmii-id

On 22. 03. 19 3:24, Fabio Estevam wrote:
> On Thu, Mar 21, 2019 at 11:15 PM Shawn Guo <shawnguo@...nel.org> wrote:
> 
>>> Unfortunately, just by looking at the dts files we do not know if a
>>> board uses an AR803x PHY or not, so I am afraid we can not do an
>>> automatic conversion.
>>
>> At least for those we already know?
> 
> Yes, I can help preparing a patch that fixes the i.MX boards we know
> use AR8031 PHY.

AFACT this issue is not AR803x specific. I was hit by the same problem
with QCA833x switch on imx6dl-yapp4. Though, we are currently the only
platform in tree using this chip and Shawn already has the fix in his tree.

I am not aware of any other PHY drivers that my cause problems.

$ git log --oneline v5.0..v5.1-rc1 --grep=RGMII --author=Vinod -- drivers/net/
6d4cd041f0af net: phy: at803x: disable delay only for RGMII mode
a968b5e9d587 net: dsa: qca8k: Enable delay for RGMII_ID mode
5ecdd77c61c8 net: dsa: qca8k: disable delay for RGMII mode
cd28d1d6e52e net: phy: at803x: Disable phy delay for RGMII mode

Michal