linux-kernel - Re: [PATCH 2/2] usb: dwc3: pci add property to allow user space role switch

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Message-ID: <87pmu36ypp.fsf@kernel.org>
Date:   Tue, 24 Aug 2021 11:19:40 +0300
From:   Felipe Balbi <balbi@...nel.org>
To:     Nehal Bakulchandra Shah <Nehal-Bakulchandra.shah@....com>
Cc:     gregkh@...uxfoundation.org, linux-usb@...r.kernel.org,
        linux-kernel@...r.kernel.org, kun.liu2@....com,
        alexander.deucher@....com
Subject: Re: [PATCH 2/2] usb: dwc3: pci add property to allow user space
 role switch


Nehal Bakulchandra Shah <Nehal-Bakulchandra.shah@....com> writes:

> For AMD platform there is a requirement to enable user space role
> switch from host to device and device to host by means of running
> following commands.
>
> HOST:   echo host > /sys/class/usb_role/dwc3.0.auto-role-switch/role
> DEVICE: echo device > /sys/class/usb_role/dwc3.0.auto-role-switch/role

A more important question that needs to be answered: why?

-- 
balbi