Hi Roger On 07/02/2013 04:42 PM, Roger Quadros wrote: > On 06/28/2013 07:47 PM, Michael Trimarchi wrote: >> 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@xxxxxxxxxxxxxxxxxxxx> 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. >> > > Right. Seems to be related to two things. OFF Mode and 2 ports being used simultaneously. > > I'm not sure how to go about fixing this. How important is OFF Mode for your application. > Can you keep it always disabled? > Right now I delivery without off mode. I will try to fix in long run the usb and I think that it could be a good platform to test omap4 mainline. Last question: If one domain is in RET mode and not OFF mode what happen during SAR restore in OFF mode? Michael > cheers, > -roger > -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
