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

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Message-ID: <e82db91d-e5a3-29f8-40cb-1ede1f161b79@ti.com>
Date:   Tue, 24 Jan 2017 16:59:09 +0200
From:   Roger Quadros <rogerq@...com>
To:     Felipe Balbi <balbi@...nel.org>, <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

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.

cheers,
-roger