linux-kernel - Re: [PATCH 0/3] usb: xhci: Add broken port disable quirk

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Date:   Thu, 26 Jan 2017 11:19:10 +0200
From:   Felipe Balbi <balbi@...nel.org>
To:     Roger Quadros <rogerq@...com>, mathias.nyman@...el.com
Cc:     linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH 0/3] usb: xhci: Add broken port disable quirk


Hi,

Roger Quadros <rogerq@...com> writes:
> Felipe,
>
> On 03/01/17 14:53, Felipe Balbi wrote:
>> 
>> Hi,
>> 
>> Roger Quadros <rogerq@...com> writes:
>>> Mathias & Felipe,
>>>
>>> On 17/11/16 17:01, Roger Quadros wrote:
>>>> Hi,
>>>>
>>>> Some XHCI controllers e.g. dwc3 based have a broken Port disable [1].
>>>>
>>>> If the attached high-speed device is misbehaving, the USB stack typically
>>>> disables the port using the PED bit in PORTSC. For the controllers that
>>>> have broken port disable, the port fails to detect further attach/detach
>>>> events and so high-speed devices can no longer be enumerated on the
>>>> port. The workaround is to prevent port disable using PED on such
>>>> controllers.
>>>>
>>>> We add a new BROKEN_PED quirk flag and 'quirk-broken-port-ped' device
>>>> property and prevent port disable using PED if we encounter the quirk flag.
>>>>
>>>> [1] - AM572x Silicon Errata http://www.ti.com/lit/er/sprz429j/sprz429j.pdf
>>>>     Section i896— USB xHCI Port Disable Feature Does Not Work
>>>
>>> Any comments on this series?
>>> patch 1 is at v3. Rest 2 are original.
>> 
>> none from me. Mathias?
>> 
>
> Mathias has queued patches 1 and 2 for v4.11.
> Can you please pick patch 3? Thanks.

done

-- 
balbi

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