Re: [PATCHv2 00/15] Get MUSB PM runtime working again

Tony Lindgren
2016-05-18T18:07:37Z

* Bin Liu <b-liu-l0cyMroinI0@public.gmane.org> [160517 15:06]:
> On Tue, May 17, 2016 at 02:54:04PM -0700, Tony Lindgren wrote:
>
> > s/pm_runtime_put/pm_runtime_put_sync/ will fix it. I'm wondering why
> > it breaks though as dsps glue does not use autosuspend? It could also
>
> I am not familiar with pm-runtime framework, but I thought dsps glue
> does use autosuspend.
>
> > be a case where the parent and child PM runtime use counts get out
> > of sync?
> >
> > BTW, I did give my series a quick try here on j5eco-evm and that behaved
> > for peripheral and host enumeration. It's pretty much the same setup as
> > on am335x I believe.
>
> Does j5eco-evm have a otg port?

Yes it has a mini-AB port and usb0_id is wired.

> The case which is broken on mine is

> - boot the board;
> - modprobe g-zero;
> - plug in a usb deivce with A-cable to the otg port;
>
> It generates drvvbus interrupt (0x100) and connect interrupt (0x10), but
> then session bit is gone and vbus has no power, so enum failed.

Is this with or without the $subject series?

> I tried to enable some dynamic-debug log, but was unable to see any
> glue. I will try to enable musb reg access log tomorrow to see if I can
> find anything.

OK, I'm looking at implementing proper PM runtime for dsps.

Regards,

Tony