linux-kernel - Re: [RFC PATCH 1/8] dt-bindings: phy: mediatek,xfi-pextp: add new bindings

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Message-ID: <ZU1nBgdspMtsI5aS@makrotopia.org>
Date:   Thu, 9 Nov 2023 23:11:02 +0000
From:   Daniel Golle <daniel@...rotopia.org>
To:     Andrew Lunn <andrew@...n.ch>
Cc:     "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Chunfeng Yun <chunfeng.yun@...iatek.com>,
        Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Felix Fietkau <nbd@....name>, John Crispin <john@...ozen.org>,
        Sean Wang <sean.wang@...iatek.com>,
        Mark Lee <Mark-MC.Lee@...iatek.com>,
        Lorenzo Bianconi <lorenzo@...nel.org>,
        Matthias Brugger <matthias.bgg@...il.com>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>,
        Heiner Kallweit <hkallweit1@...il.com>,
        Russell King <linux@...linux.org.uk>,
        Alexander Couzens <lynxis@...0.eu>,
        Philipp Zabel <p.zabel@...gutronix.de>, netdev@...r.kernel.org,
        devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-phy@...ts.infradead.org
Subject: Re: [RFC PATCH 1/8] dt-bindings: phy: mediatek,xfi-pextp: add new
 bindings

Hi Andrew,

On Thu, Nov 09, 2023 at 10:55:55PM +0100, Andrew Lunn wrote:
> > +  mediatek,usxgmii-performance-errata:
> > +    $ref: /schemas/types.yaml#/definitions/flag
> > +    description:
> > +      USXGMII0 on MT7988 suffers from a performance problem in 10GBase-R
> > +      mode which needs a work-around in the driver. The work-around is
> > +      enabled using this flag.
> 
> Is there more details about this? I'm just wondering if this should be
> based on the compatible, rather than a bool property.

The vendor sources where this is coming from are here:

https://git01.mediatek.com/plugins/gitiles/openwrt/feeds/mtk-openwrt-feeds/+/a500d94cd47e279015ce22947e1ce396a7516598%5E%21/#F0

And I'm afraid this is as much detail as it gets. And yes, we could
also base this on the compatible and just have two different ones for
the two PEXTP instances found in MT7988.
Let me know your conclusion in that regard.


Cheers


Daniel