linux-kernel - Re: [PATCH v4] usb: dwc3: Don't switch OTG -> peripheral if extcon is present

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Date:   Tue, 27 Sep 2022 15:21:45 +0300
From:   Andy Shevchenko <andriy.shevchenko@...el.com>
To:     Andrey Smirnov <andrew.smirnov@...il.com>
Cc:     Ferry Toth <fntoth@...il.com>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Felipe Balbi <balbi@...nel.org>,
        Thinh Nguyen <thinhn@...opsys.com>, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org,
        Thinh Nguyen <Thinh.Nguyen@...opsys.com>,
        Sven Peter <sven@...npeter.dev>
Subject: Re: [PATCH v4] usb: dwc3: Don't switch OTG -> peripheral if extcon
 is present

On Mon, Sep 26, 2022 at 11:31:58AM -0700, Andrey Smirnov wrote:
> On Mon, Sep 26, 2022 at 3:19 AM Andy Shevchenko
> <andriy.shevchenko@...el.com> wrote:
> > On Sun, Sep 25, 2022 at 10:43:07PM -0700, Andrey Smirnov wrote:
> > > On Sun, Sep 25, 2022 at 12:21 PM Ferry Toth <fntoth@...il.com> wrote:

...

> > > IMHO instead of trying to rush something in it be prudent to revert my
> > > patch _and_ address the fact that above patch was lost during the
> > > merge (Andy's revert needs to be updated)
> >
> > I'm not an expert in your fixes for DWC3, so please come up with
> > the solution sooner than later, otherwise I will try to get my
> > reverts into the final release, because they obviously fix the
> > regression.
> 
> You don't need to be an expert here. All that's required is that your
> revert get the code to look like it looks in
> 
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.0-rc6&id=ab7aa2866d295438dc60522f85c5421c6b4f1507
> 
> so the last hunk in your patch instead of looking like:
> 
> @@ -538,6 +584,10 @@ int dwc3_drd_init(struct dwc3 *dwc)
>  {
>         int ret, irq;
> 
> +       dwc->edev = dwc3_get_extcon(dwc);
> +       if (IS_ERR(dwc->edev))
> +               return PTR_ERR(dwc->edev);
> +
>         if (ROLE_SWITCH &&
>             device_property_read_bool(dwc->dev, "usb-role-switch"))
>                 return dwc3_setup_role_switch(dwc);
> 
> should look like
> 
> @@ -538,6 +584,10 @@ int dwc3_drd_init(struct dwc3 *dwc)
>  {
>         int ret, irq;
> 
>         if (ROLE_SWITCH &&
>             device_property_read_bool(dwc->dev, "usb-role-switch"))
>                 return dwc3_setup_role_switch(dwc);
> 
> +       dwc->edev = dwc3_get_extcon(dwc);
> +       if (IS_ERR(dwc->edev))
> +               return PTR_ERR(dwc->edev);
> +
> 
> Can you update your series accordingly or do you need me to do that? I
> won't have the cycles until the end of the week (Sat).

Thanks for elaboration. I will do it (hopefully today).

-- 
With Best Regards,
Andy Shevchenko