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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
Date: Sat, 29 Oct 2022 08:52:13 +0800	[thread overview]
Message-ID: <20221029005213.GD125525@dragon> (raw)
In-Reply-To: <5614294.DvuYhMxLoT@steina-w>

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

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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

WARNING: multiple messages have this Message-ID (diff)
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
Date: Sat, 29 Oct 2022 08:52:13 +0800	[thread overview]
Message-ID: <20221029005213.GD125525@dragon> (raw)
In-Reply-To: <5614294.DvuYhMxLoT@steina-w>

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

  reply	other threads:[~2022-10-29  0:53 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-26 11:26 [PATCH 1/1] arm64: dts: imx8mm-tqma8mqml-mba8mx: Fix USB DR Alexander Stein
2022-09-26 11:26 ` Alexander Stein
2022-10-24  1:31 ` Shawn Guo
2022-10-24  1:31   ` Shawn Guo
2022-10-24  8:15   ` Alexander Stein
2022-10-24  8:15     ` Alexander Stein
2022-10-29  0:52     ` Shawn Guo [this message]
2022-10-29  0:52       ` Shawn Guo

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