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References: <20221111094238.1640-1-linux.amoon@gmail.com> <CAMdYzYp2wSrkOEh-v6Wye32TA9imfNF4CrUdKL7q8pOCQU307g@mail.gmail.com>
In-Reply-To: <CAMdYzYp2wSrkOEh-v6Wye32TA9imfNF4CrUdKL7q8pOCQU307g@mail.gmail.com>
From:   Anand Moon <linux.amoon@gmail.com>
Date:   Wed, 16 Nov 2022 23:41:07 +0530
Message-ID: <CANAwSgTNYDrkvUw_r_CQbgQ9KpzMqi9NP5Wfx5UvJeDvsyrTcQ@mail.gmail.com>
Subject: Re: [linux-next-v1 1/3] arm64: dts: rockchip: Fix gmac phy mode to
 rgmii on Rock 3A sbc
To:     Peter Geis <pgwipeout@gmail.com>
Cc:     Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Heiko Stuebner <heiko@sntech.de>,
        Chukun Pan <amadeus@jmu.edu.cn>,
        Michael Riesch <michael.riesch@wolfvision.net>,
        devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
        linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org
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 Hi Petter / Michael.

Thanks for your review comments.

On Fri, 11 Nov 2022 at 18:26, Peter Geis <pgwipeout@gmail.com> wrote:
>
> On Fri, Nov 11, 2022 at 4:43 AM Anand Moon <linux.amoon@gmail.com> wrote:
> >
> > On rk356x ethernet phy support reduced media independent interface (RMII)
> > and reduced gigabit media independent interface (RGMII).
> > So set the phy mode to rgmii.
>
> The RTL8211 supports rgmii-id just fine, you only need to go to rgmii
> on these boards if you need to tune the delays manually.

Ok rgmii supports internal rx and tx clock delay
whereas rgmii-id does not supports internal clock delay.

>
> >
> > Signed-off-by: Anand Moon <linux.amoon@gmail.com>
> > ---
> >  arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts | 2 +-
> >  1 file changed, 1 insertion(+), 1 deletion(-)
> >
> > diff --git a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
> > index ea74ba32fbbd..72e410e3aca8 100644
> > --- a/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
> > +++ b/arch/arm64/boot/dts/rockchip/rk3568-rock-3a.dts
> > @@ -253,7 +253,7 @@ &gmac1 {
> >         assigned-clock-rates = <0>, <125000000>;
> >         clock_in_out = "output";
> >         phy-handle = <&rgmii_phy1>;
> > -       phy-mode = "rgmii-id";
> > +       phy-mode = "rgmii";
>
> You should be setting the delay tuning in this patch as well.

I will try to fix this in the next version.

>
> >         pinctrl-names = "default";
> >         pinctrl-0 = <&gmac1m1_miim
> >                      &gmac1m1_tx_bus2
> > --
> > 2.38.1
Thanks


-Anand