linux-kernel - Re: [PATCH v1 1/1] usb: dwc3: pci: Enable usb2-gadget-lpm-disable for Intel Merrifield

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Message-ID: <CAHp75VecaOXdXh5O5NBA9EtoMnPEE_0mmvcFiXVUgw6cT1s51Q@mail.gmail.com>
Date:   Sun, 25 Apr 2021 21:00:28 +0300
From:   Andy Shevchenko <andy.shevchenko@...il.com>
To:     Ferry Toth <ftoth@...londelft.nl>
Cc:     USB <linux-usb@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Felipe Balbi <balbi@...nel.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Heikki Krogerus <heikki.krogerus@...ux.intel.com>,
        Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Subject: Re: [PATCH v1 1/1] usb: dwc3: pci: Enable usb2-gadget-lpm-disable for
 Intel Merrifield

On Sun, Apr 25, 2021 at 6:26 PM Ferry Toth <ftoth@...londelft.nl> wrote:
>
> On Intel Merrifield LPM is causing host to reset port after a timeout.

the host

> By disabling LPM entirely this is prevented.

Reviewed-by: Andy Shevchenko <andy.shevchenko@...il.com>

Thanks!

> Signed-off-by: Ferry Toth <ftoth@...londelft.nl>
> Fixes: 066c09593454 ("usb: dwc3: pci: Enable extcon driver for Intel Merrifield")
> ---
>  drivers/usb/dwc3/dwc3-pci.c | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/drivers/usb/dwc3/dwc3-pci.c b/drivers/usb/dwc3/dwc3-pci.c
> index 4c5c6972124a..e5d7eed2e60c 100644
> --- a/drivers/usb/dwc3/dwc3-pci.c
> +++ b/drivers/usb/dwc3/dwc3-pci.c
> @@ -122,6 +122,7 @@ static const struct property_entry dwc3_pci_mrfld_properties[] = {
>         PROPERTY_ENTRY_STRING("linux,extcon-name", "mrfld_bcove_pwrsrc"),
>         PROPERTY_ENTRY_BOOL("snps,dis_u3_susphy_quirk"),
>         PROPERTY_ENTRY_BOOL("snps,dis_u2_susphy_quirk"),
> +       PROPERTY_ENTRY_BOOL("snps,usb2-gadget-lpm-disable"),
>         PROPERTY_ENTRY_BOOL("linux,sysdev_is_parent"),
>         {}
>  };
> --
> 2.27.0
>


-- 
With Best Regards,
Andy Shevchenko