linux-kernel - Re: [PATCH] arm64: dts: rockchip: Fix SoQuartz CM4IO usb

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Date:   Sat, 11 Jun 2022 09:53:41 -0400
From:   Peter Geis <pgwipeout@...il.com>
To:     Heiko Stuebner <heiko@...ech.de>
Cc:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Michael Riesch <michael.riesch@...fvision.net>,
        devicetree <devicetree@...r.kernel.org>,
        arm-mail-list <linux-arm-kernel@...ts.infradead.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] arm64: dts: rockchip: Fix SoQuartz CM4IO usb

On Sat, Jun 11, 2022 at 9:50 AM Heiko Stuebner <heiko@...ech.de> wrote:
>
> Am Freitag, 10. Juni 2022, 16:44:23 CEST schrieb Peter Geis:
> > On Fri, Jun 10, 2022 at 9:26 AM Peter Geis <pgwipeout@...il.com> wrote:
> > >
> > > The SoQuartz CM4-IO should support otg mode, however it currently
> > > defaults to device mode when otg is enabled. Force it to host mode to
> > > retain the previous behavior.
> >
> > It would seem the role-switch issue is more widespread than originally
> > thought, affecting other boards where automatic control should work.
> > Please hold this patch while I investigate further.
>
> ok!
>
> I guess this also applies to
>         "arm64: dts: rockchip: Fix Quartz64-A dwc3 otg port behavior"?

No, on Quartz64 Model A it can't work, the requisite pin isn't connected.
I think I've found the problem, I've requested a few people to test a fix.
Do you have a Model B or SoQuartz to test against (or any other rk356x
board that has the id pin hooked up)?

Thanks,
Peter

>
>
> Heiko
>
>
> > >
> > > Fixes: bc405bb3eeee ("arm64: dts: rockchip: enable otg/drd operation of usb_host0_xhci in rk356x")
> > >
> > > Signed-off-by: Peter Geis <pgwipeout@...il.com>
> > > ---
> > >  arch/arm64/boot/dts/rockchip/rk3566-soquartz-cm4.dts | 1 +
> > >  1 file changed, 1 insertion(+)
> > >
> > > diff --git a/arch/arm64/boot/dts/rockchip/rk3566-soquartz-cm4.dts b/arch/arm64/boot/dts/rockchip/rk3566-soquartz-cm4.dts
> > > index e00568a6be5c..56764fae9f9d 100644
> > > --- a/arch/arm64/boot/dts/rockchip/rk3566-soquartz-cm4.dts
> > > +++ b/arch/arm64/boot/dts/rockchip/rk3566-soquartz-cm4.dts
> > > @@ -169,6 +169,7 @@ &usb2phy0_otg {
> > >  };
> > >
> > >  &usb_host0_xhci {
> > > +       dr_mode = "host";
> > >         status = "okay";
> > >  };
> > >
> > > --
> > > 2.25.1
> > >
> >
>
>
>
>