Re: [PATCH 3/3] usb: dwc3: add a quirk for device disconnection issue in Synopsis dwc3 core

Felipe Balbi
2015-01-12T17:52:16Z

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On Mon, Jan 12, 2015 at 06:29:43PM +0100, Paul Bolle wrote:
> On Mon, 2015-01-12 at 11:20 -0600, Felipe Balbi wrote:
> > On Sun, Jan 11, 2015 at 11:19:55PM +0800, Sneeker Yeh wrote:
> > > in case i express unclearly i also put a pdf:
> > > https://drive.google.com/file/d/0B18MmcvvKjNNbDF6eEdHSzZCazA/view
> > >
> > > This issue is defined by a two-way race at disconnect, between
> > > 1) class driver interrupt endpoint resheduling attempts if the ISR gave an
> > > ep error event due to device detach (it would try 3 times)
> > > 2) Disconnect interrupt on PORTSC_CSC, which is cleared by hub thread
> > > asynchronously
> > > 3) The hardware IP was configured in silicon with
> > > - DWC_USB3_SUSPEND_ON_DISCONNECT_EN=1 (this is an IP configuration
> >
> > yeah, aparently this is another configuration which is not exposed on
> > HWPARAMS registers. Paul, can you confirm for us ? I couldn't find it on
> > Databook on any of the HWPARAMS registers.
>
> I guess you meant to ask Pawel, because I know nothing at all about all
> that!

No, it was Paul Zimmerman :-)