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SubjectRe: [PATCH 2/2] usb: dwc3: pci add property to allow user space role switch
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Hi
On 8/24/2021 1:49 PM, Felipe Balbi wrote:
>
> Nehal Bakulchandra Shah <Nehal-Bakulchandra.shah@amd.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?
>
Our customer platform is not completely capable of OTG i.e with type C
controller it does not have PD to support role switching. Hence, they
have script which triggers the role switch based on ACPI/EC interrupt.

Regards
Nehal Shah

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