Re: omap4 ehci sporadic resume issue

[Roger Quadros <rogerq-l0cyMroinI0@public.gmane.org>]

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?

cheers,
-roger

--
To unsubscribe from this list: send the line "unsubscribe linux-usb" in
the body of a message to majordomo-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html