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Date:   Sat, 29 Oct 2022 08:52:13 +0800
From:   Shawn Guo <shawnguo@kernel.org>
To:     Alexander Stein <alexander.stein@ew.tq-group.com>
Cc:     Rob Herring <robh+dt@kernel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Sascha Hauer <s.hauer@pengutronix.de>,
        Pengutronix Kernel Team <kernel@pengutronix.de>,
        Fabio Estevam <festevam@gmail.com>, devicetree@vger.kernel.org,
        linux-arm-kernel@lists.infradead.org
Subject: Re: Re: [PATCH 1/1] arm64: dts: imx8mm-tqma8mqml-mba8mx: Fix USB DR
Message-ID: <20221029005213.GD125525@dragon>
References: <20220926112622.2912885-1-alexander.stein@ew.tq-group.com>
 <20221024013123.GV125525@dragon>
 <5614294.DvuYhMxLoT@steina-w>
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On Mon, Oct 24, 2022 at 10:15:28AM +0200, Alexander Stein wrote:
> Hello Shawn,
> 
> Am Montag, 24. Oktober 2022, 03:31:23 CEST schrieb Shawn Guo:
> > On Mon, Sep 26, 2022 at 01:26:22PM +0200, Alexander Stein wrote:
> > > extcon does not work somehow, so switch to usb-role-switch instead.
> > 
> > So extcon was added without testing?
> 
> It had been tested, but apparently only the USB Host case :( extcon itself 
> does work and detects ID pin correctly. Cable states switch when a USB device 
> (mass storage) is attached and removed, thus mass storage is detect and 
> usable.
> But unfortunately this is not the case for USB device using g_serial udc 
> driver. IMHO this seems to be a problem within chipidea usb driver.
> Using usb-role-switch instead, both USB host and USB device do work.

Thanks for the clarification!  Could you improve the commit log a bit
with these information?

Shawn