linux-kernel - Re: [PATCH v5 1/2] stmmac: dwmac-mediatek: enable 2ns delay only for special cases

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Message-ID: <bfc4c7b5-3d5b-e087-1e33-1c461e361802@collabora.com>
Date:   Fri, 23 Dec 2022 10:24:29 +0100
From:   AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@...labora.com>
To:     Biao Huang <biao.huang@...iatek.com>, Andrew Lunn <andrew@...n.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Matthias Brugger <matthias.bgg@...il.com>
Cc:     Giuseppe Cavallaro <peppe.cavallaro@...com>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        "David S . Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Richard Cochran <richardcochran@...il.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-mediatek@...ts.infradead.org, linux-kernel@...r.kernel.org,
        macpaul.lin@...iatek.com
Subject: Re: [PATCH v5 1/2] stmmac: dwmac-mediatek: enable 2ns delay only for
 special cases

Il 23/12/22 02:50, Biao Huang ha scritto:
> In current driver, MAC will always enable 2ns delay in RGMII mode,
> but that will lead to transmission failures for "rgmii-id"/"rgmii-txid"
> cases.
> 
> Modify the implementation of fix_mac_speed() to ensure the 2ns delay
> will only take effect for "rgmii-rxid"/"rgmii" cases, then user can
> choose phy-mode freely.
> 
> Fixes: f2d356a6ab71 ("stmmac: dwmac-mediatek: add support for mt8195")
> Signed-off-by: Biao Huang <biao.huang@...iatek.com>

Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>