Re: [PATCH v4 3/9] usb: dwc3: Increase timeout for CmdAct cleared by device controller

[John Stultz]

On Tue, Oct 29, 2019 at 2:11 AM Felipe Balbi <balbi@xxxxxxxxxx> wrote:
> John Stultz <john.stultz@xxxxxxxxxx> writes:
> > From: Yu Chen <chenyu56@xxxxxxxxxx>
> >
> > It needs more time for the device controller to clear the CmdAct of
> > DEPCMD on Hisilicon Kirin Soc.
>
> Why does it need more time? Why is it so that no other platform needs
> more time, only this one? And which command, specifically, causes
> problem?

Hrm. Sadly I don't have that context (again I'm picking up a
semi-abandoned patchset here), which is unfortunate, as I'm sure
someone spent a number of hours debugging things to come up with this.
:)

But alas, I've dropped this for now in my stack, and things seem to be
working ok so far. I suspect there's some edge case I'll run into, but
hopefully I'll be able to debug and get more details when that
happens.

I do appreciate the review and pushback here!

thanks
-john