linux-kernel - Re: [PATCH v2 12/12] [UNTESTED] riscv: dts: starfive: beaglev-starlight: Enable gmac

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Date:   Thu, 16 Nov 2023 20:30:40 +0200
From:   Cristian Ciocaltea <cristian.ciocaltea@...labora.com>
To:     Conor Dooley <conor@...nel.org>
Cc:     Andrew Lunn <andrew@...n.ch>, Conor Dooley <conor+dt@...nel.org>,
        Emil Renner Berthing <kernel@...il.dk>,
        "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>,
        Samin Guo <samin.guo@...rfivetech.com>,
        Paul Walmsley <paul.walmsley@...ive.com>,
        Palmer Dabbelt <palmer@...belt.com>,
        Albert Ou <aou@...s.berkeley.edu>,
        Alexandre Torgue <alexandre.torgue@...s.st.com>,
        Jose Abreu <joabreu@...opsys.com>,
        Maxime Coquelin <mcoquelin.stm32@...il.com>,
        Richard Cochran <richardcochran@...il.com>,
        Giuseppe Cavallaro <peppe.cavallaro@...com>,
        netdev@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org, linux-riscv@...ts.infradead.org,
        linux-stm32@...md-mailman.stormreply.com,
        linux-arm-kernel@...ts.infradead.org, kernel@...labora.com,
        geert@...ux-m68k.org
Subject: Re: [PATCH v2 12/12] [UNTESTED] riscv: dts: starfive:
 beaglev-starlight: Enable gmac

On 11/16/23 19:55, Conor Dooley wrote:
> On Thu, Nov 16, 2023 at 03:15:46PM +0200, Cristian Ciocaltea wrote:
>> On 10/30/23 00:53, Cristian Ciocaltea wrote:
>>> On 10/29/23 20:46, Andrew Lunn wrote:
>>>> On Sun, Oct 29, 2023 at 06:27:12AM +0200, Cristian Ciocaltea wrote:
>>>>> The BeagleV Starlight SBC uses a Microchip KSZ9031RNXCA PHY supporting
>>>>> RGMII-ID.
>>>>>
>>>>> TODO: Verify if manual adjustment of the RX internal delay is needed. If
>>>>> yes, add the mdio & phy sub-nodes.
>>>>
>>>> Please could you try to get this tested. It might shed some light on
>>>> what is going on here, since it is a different PHY.
>>>
>>> Actually, this is the main reason I added the patch. I don't have access
>>> to this board, so it would be great if we could get some help with testing.
>>
>> @Emil, @Conor: Any idea who might help us with a quick test on the
>> BeagleV Starlight board?
> 
> I don't have one & I am not sure if Emil does. Geert (CCed) should have
> one though. Is there a specific test you need to have done?

As Andrew already pointed out, we'd like to know if networking for this
board works without any further adjustment of the RX internal delay.

This was necessary for VisionFive (see previous PATCH v2 11/12), but the
PHY is different (Motorcomm YT8521), hence this test might help us
understand if there's a potential issue with the SoC or the PHY.

Thanks,
Cristian