linux-kernel - Re: [PATCH] phy: rockchip-inno-usb2: Ignore OTG IRQs in host mode

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Date:   Fri, 8 Jul 2022 09:03:25 -0400
From:   Peter Geis <pgwipeout@...il.com>
To:     Frank Wunderlich <frank-w@...lic-files.de>
Cc:     Samuel Holland <samuel@...lland.org>,
        Vinod Koul <vkoul@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Heiko Stuebner <heiko@...ech.de>,
        Kishon Vijay Abraham I <kishon@...com>,
        arm-mail-list <linux-arm-kernel@...ts.infradead.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "open list:GENERIC PHY FRAMEWORK" <linux-phy@...ts.infradead.org>,
        "open list:ARM/Rockchip SoC..." <linux-rockchip@...ts.infradead.org>
Subject: Re: [PATCH] phy: rockchip-inno-usb2: Ignore OTG IRQs in host mode

Good Morning,

I've confirmed this also resolves the issues with phy warnings on quartz64-a.
Tested-by: Peter Geis <pgwipeout@...il.com>

Very Respectfully,
Peter Geis

On Fri, Jul 8, 2022 at 7:47 AM Frank Wunderlich <frank-w@...lic-files.de> wrote:
>
> Hi Samuel
>
> thx for the fix...with this it works again
>
> Tested-by: Frank Wunderlich <frank-w@...lic-files.de>
>
> regards Frank
>
>
> > Gesendet: Freitag, 08. Juli 2022 um 08:14 Uhr
> > Von: "Samuel Holland" <samuel@...lland.org>
> > An: "Frank Wunderlich" <frank-w@...lic-files.de>, "Vinod Koul" <vkoul@...nel.org>
> > Cc: "Greg Kroah-Hartman" <gregkh@...uxfoundation.org>, "Peter Geis" <pgwipeout@...il.com>, "Samuel Holland" <samuel@...lland.org>, "Heiko Stuebner" <heiko@...ech.de>, "Kishon Vijay Abraham I" <kishon@...com>, linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org, linux-phy@...ts.infradead.org, linux-rockchip@...ts.infradead.org
> > Betreff: [PATCH] phy: rockchip-inno-usb2: Ignore OTG IRQs in host mode
> >
> > When the OTG port is fixed to host mode, the driver does not request its
> > IRQs, nor does it enable those IRQs in hardware. Similarly, the driver
> > should ignore the OTG port IRQs when handling the shared interrupt.
> >
> > Otherwise, it would update the extcon based on an ID pin which may be in
> > an undefined state, or try to queue a uninitialized work item.
> >
> > Fixes: 6a98df08ccd5 ("phy: rockchip-inno-usb2: Fix muxed interrupt support")
> > Reported-by: Frank Wunderlich <frank-w@...lic-files.de>
> > Signed-off-by: Samuel Holland <samuel@...lland.org>
> > ---
> >
> >  drivers/phy/rockchip/phy-rockchip-inno-usb2.c | 4 +++-
> >  1 file changed, 3 insertions(+), 1 deletion(-)
> >
> > diff --git a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
> > index 6711659f727c..26b841c49ec6 100644
> > --- a/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
> > +++ b/drivers/phy/rockchip/phy-rockchip-inno-usb2.c
> > @@ -978,7 +978,9 @@ static irqreturn_t rockchip_usb2phy_irq(int irq, void *data)
> >
> >               switch (rport->port_id) {
> >               case USB2PHY_PORT_OTG:
> > -                     ret |= rockchip_usb2phy_otg_mux_irq(irq, rport);
> > +                     if (rport->mode != USB_DR_MODE_HOST &&
> > +                         rport->mode != USB_DR_MODE_UNKNOWN)
> > +                             ret |= rockchip_usb2phy_otg_mux_irq(irq, rport);
> >                       break;
> >               case USB2PHY_PORT_HOST:
> >                       ret |= rockchip_usb2phy_linestate_irq(irq, rport);
> > --
> > 2.35.1
> >
> >