Hi Lane, On Friday 19 November 2010 15:08:38 Lane Brooks wrote: > On 11/19/2010 06:29 AM, David Cohen wrote: > > On Thu, Nov 18, 2010 at 12:17:21AM +0100, ext Lane Brooks wrote: > >> On Wednesday 17 November 2010 00:46:27 Lane Brooks wrote: > >>>> Laurent, > >>>> > >>>> I am getting iommu translation errors when I try to use the CCDC > >>>> output after using the Resizer output. > >>>> > >>>> If I use the CCDC output to stream some video, then close it down, > >>>> switch to the Resizer output and open it up and try to stream, I get > >>>> the following errors spewing out: > >>>> > >>>> omap-iommu omap-iommu.0: omap2_iommu_fault_isr: da:00d0ef00 > >>>> translation fault > >>>> omap-iommu omap-iommu.0: iommu_fault_handler: da:00d0ef00 pgd:ce664034 > >>>> *pgd:00000000 > >>>> > >>>> and the select times out. > >>>> > >>>> From a fresh boot, I can stream just fine from the Resizer and then > >>>> > >>>> switch to the CCDC output just fine. It is only when I go from the > >>>> CCDC to the Resizer that I get this problem. Furthermore, when it > >>>> gets into this state, then anything dev node I try to use has the > >>>> translation errors and the only way to recover is to reboot. > >>>> > >>>> Any ideas on the problem? > > > > I'm not sure if it's your case, but OMAP3 ISP driver does not support > > pipeline with multiples outputs yet. We have to return error from the > > driver in this case. If you configured CCDC to write to memory and then > > to write to preview/resizer afterwards without deactivating the link to > > write to memory, you may face a similar problem you described. > > > > Can you please try a patch I've sent to you (CC'ing linux-media) with > > subject: "[omap3isp][PATCH] omap3isp: does not allow pipeline with > > multiple video outputs yet"? > > > > Regards, > > > > David > > David, > > I am not trying to use multiple outputs simultaneously. I get the > translation error with the following sequence: > > - Open resizer output and setup media links. > - Stream some images. > - Close resizer. > - Reset all media links. > - Open CCDC and setup media links. > - Try to stream some images but get translation faults. > > Is your patch going to help with this problem? If you reset all links before setting them up for the CCDC output, probably not (unless you have a bug in your CCDC links setup, but I doubt that). -- Regards, Laurent Pinchart -- To unsubscribe from this list: send the line "unsubscribe linux-media" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
