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

Paul Bolle
2015-01-12T17:29:49Z

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!

Thanks,

Paul Bolle