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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Fri, 17 Nov 2023 10:12:46 +0100
Message-ID: <CAMuHMdVXAx+b6=70PdgJrpbegBkDpb3w1UF0_u1Odi=JoYL2-w@mail.gmail.com>
Subject: Re: [PATCH v2 12/12] [UNTESTED] riscv: dts: starfive:
 beaglev-starlight: Enable gmac
To:     Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Cc:     Conor Dooley <conor@kernel.org>, Andrew Lunn <andrew@lunn.ch>,
        Conor Dooley <conor+dt@kernel.org>,
        Emil Renner Berthing <kernel@esmil.dk>,
        "David S. Miller" <davem@davemloft.net>,
        Eric Dumazet <edumazet@google.com>,
        Jakub Kicinski <kuba@kernel.org>,
        Paolo Abeni <pabeni@redhat.com>,
        Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Samin Guo <samin.guo@starfivetech.com>,
        Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Alexandre Torgue <alexandre.torgue@foss.st.com>,
        Jose Abreu <joabreu@synopsys.com>,
        Maxime Coquelin <mcoquelin.stm32@gmail.com>,
        Richard Cochran <richardcochran@gmail.com>,
        Giuseppe Cavallaro <peppe.cavallaro@st.com>,
        netdev@vger.kernel.org, devicetree@vger.kernel.org,
        linux-kernel@vger.kernel.org, linux-riscv@lists.infradead.org,
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Hi Cristian,

On Fri, Nov 17, 2023 at 9:59 AM Cristian Ciocaltea
<cristian.ciocaltea@collabora.com> wrote:
> On 11/17/23 10:49, Cristian Ciocaltea wrote:
> > On 11/17/23 10:37, Geert Uytterhoeven wrote:
> >> On Thu, Nov 16, 2023 at 6:55 PM Conor Dooley <conor@kernel.org> 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
> >>
> >> I believe Esmil has.
> >>
> >>> one though. Is there a specific test you need to have done?
> >>
> >> I gave it a try, on top of latest renesas-drivers[1].
>
> [...]
>
> >>
> >> Looks like it needs more non-coherent support before we can test
> >> Ethernet.
> >
> > Hi Geert,
> >
> > Thanks for taking the time to test this!
> >
> > Could you please check if the following are enabled in your kernel config:
> >
> >   CONFIG_DMA_GLOBAL_POOL
> >   CONFIG_RISCV_DMA_NONCOHERENT
> >   CONFIG_RISCV_NONSTANDARD_CACHE_OPS
> >   CONFIG_SIFIVE_CCACHE

CONFIG_DMA_GLOBAL_POOL and CONFIG_RISCV_NONSTANDARD_CACHE_OPS were
indeed no longer enabled, as they cannot be enabled manually.

After cherry-picking commit e14ad9ff67fd51dc ("riscv: errata: Add
StarFive JH7100 errata") in esmil/visionfive these options become
enabled. Now it gets a bit further, but still lots of CCACHE DataFail
errors.

> Also please note the series requires the SiFive Composable Cache
> controller patches provided by Emil [1].
>
> [1]: https://lore.kernel.org/all/20231031141444.53426-1-emil.renner.berthing@canonical.com/

That series does not contain any Kconfig changes, so there must be
other missing dependencies?

Perhaps I should just defer to Emil ;-)

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds