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Date:   Wed, 14 Jul 2021 22:04:55 -0400
From:   Alan Stern <stern@rowland.harvard.edu>
To:     Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Cc:     Minas Harutyunyan <Minas.Harutyunyan@synopsys.com>,
        Matt Corallo <oc2udbzfd@mattcorallo.com>,
        "linux-usb@vger.kernel.org" <linux-usb@vger.kernel.org>,
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        <linux-amlogic@lists.infradead.org>,
        "linux.amoon@gmail.com" <linux.amoon@gmail.com>,
        Artur Petrosyan <Arthur.Petrosyan@synopsys.com>
Subject: Re: ODROID-C1/-C2 USB Detection only triggered by some devices dwc2
Message-ID: <20210715020455.GA398513@rowland.harvard.edu>
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On Wed, Jul 14, 2021 at 09:44:51PM -0400, Alan Stern wrote:
> Martin, here's another test you can try, on both the Odroid and PC 
> systems.  Boot with usb.autosuspend=-1 on the command line to disable 
> default runtime suspend.  But then before plugging in the drive, start a 
> usbmon trace and do:
> 
> 	echo 2 >/sys/bus/usb/devices/1-2/power/autosuspend

Oops, that should be 1-1, not 1-2.  As you would discover when running 
the command.

Alan Stern