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

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Message-Id: <ec9cc2c9-733c-4e72-b61f-d2ab3bf7a99b@app.fastmail.com>
Date:   Fri, 23 Sep 2022 20:35:13 +0200
From:   "Sven Peter" <sven@...npeter.dev>
To:     "Andrey Smirnov" <andrew.smirnov@...il.com>,
        "Andy Shevchenko" <andriy.shevchenko@...el.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>
Subject: Re: [PATCH v4] usb: dwc3: Don't switch OTG -> peripheral if extcon is present



On Fri, Sep 23, 2022, at 20:23, Andrey Smirnov wrote:
> On Fri, Sep 23, 2022 at 9:42 AM Andy Shevchenko
> <andriy.shevchenko@...el.com> wrote:
>>
>> On Thu, Sep 22, 2022 at 04:32:55PM -0700, Andrey Smirnov wrote:
>> > On Thu, Sep 22, 2022 at 3:23 AM Ferry Toth <fntoth@...il.com> wrote:
>> > > On 22-09-2022 12:08, Andy Shevchenko wrote:
>> > > On Sun, Apr 03, 2022 at 09:49:07AM -0700, Andrey Smirnov wrote:
>>
>> FYI: For now I sent a revert, but if we got a solution quicker we always
>> can choose the course of actions.
>>
>
> I think we have another problem. This patch happened in parallel to mine
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?h=v6.0-rc6&id=ab7aa2866d295438dc60522f85c5421c6b4f1507
>
> so my changes didn't have that fix in mind and I think your revert
> will not preserve that fix. Can you update your revert to take care of
> that too, please?
>
> I'm really confused how the above commit could be followed up by:
>
> https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/drivers/usb/dwc3/drd.c?h=v6.0-rc6&id=0f01017191384e3962fa31520a9fd9846c3d352f
>
> the diffs in dwc3_drd_init seem contradictory

I noticed this a while ago when I finally rebased the M1 USB3 PHY WIP branch
and have been meaning to send a fix. Then life unfortunately got in the way and
I completely forgot about it again.

Both patches were sent at approximately the same time and I think got merged into
two separate branches. The conflict resolution [1] then went bad but I didn't notice
until weeks later :(


Best,

Sven


[1] https://lore.kernel.org/lkml/20220426150842.473be40e@canb.auug.org.au/