Re: omap4 ehci sporadic resume issue

[Michael Trimarchi <michael-dyjBcgdgk7Pe9wHmmfpqLFaTQe2KTcn/@public.gmane.org>]

Hi

On Fri, Jun 28, 2013 at 02:46:11PM +0300, Roger Quadros wrote:
> On 06/28/2013 02:33 PM, Michael Trimarchi wrote:
> > Hi Roger
> > 
> > On Thu, Jun 27, 2013 at 11:07:11PM +0300, Ruslan Bilovol wrote:
> >> On Thu, Jun 27, 2013 at 10:24 PM, Michael Trimarchi
> >> <michael-dyjBcgdgk7Pe9wHmmfpqLFaTQe2KTcn/@public.gmane.org> wrote:
> 
> >> Do you have locks around this software workaround?
> >> The patch I did against 3.4 linux kernel may be helpful for
> >> you in such case: http://review.omapzoom.org/28515
> >> Another patch extends this WA for all OMAP4 SoCs:
> >> http://review.omapzoom.org/31108
> > 
> > I'm testing using pm_test and stop to core (5ms and not 5 seconds) (usb suspend cycle are done correctly) so
> > the problem could be:
> > 
> > 1) SAR usb context restore. I have applied the SAR workaround but the core doesn't go in full retantion
> > could be it a problem?
> 
> If core doesn't go in to OFF then SAR will not come into play. Are you still affected by the
> issue if OFF mode is disabled? If yes then it probably is not related to SAR.
> 
> > 
> > 2) idle status of ulpis pins?
> 
> Yes this can be possible.
> 
> When you said earlier that the problem doesn't happen when one of the ULPIs is used
> did you try both of them individually. e.g. case 1: port 1 only enabled,
> case 2: port 2 only enabled.
> 
> Did it work in both the cases?

Yes, so I don't think could be a problem of ulpi pins and why this happen
on both at the same time? Seems more connected to somenthing else.

Michael

> 
> cheers,
> -roger
> 
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