On 11/19/2010 07:13 AM, Laurent Pinchart wrote:
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).
I can stream just fine from the CCDC output if I do not use the resizer
prior, so I am pretty sure I am setting up the CCDC links correctly.
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