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Re: [libdc] IDCC camera's & firewire juju stack

David Moore wrote:
> On Fri, 2008-01-11 at 10:44 +0100, Stefan Richter wrote:
>> No, according to what several people saw with VT630x in OHCI 1.0 mode,
>> there is still the bug that the DMA program stops after receiving one or
>> a few frames.  This is 100% reproducible with coriander + IIDC camera
>> and dvgrab + DV camcorder.
>> https://bugzilla.redhat.com/show_bug.cgi?id=415841
>> As far as I understood, this presumably happens because the problem
>> which David Moore addressed with "fw-ohci: Fix for dualbuffer
>> three-or-more buffers" is also present but unfixed in the
>> packet-per-buffer code.
> I thought I had fixed that in my "fw-ohci: Bug fixes for
> packet-per-buffer support" patch

That's what I was thinking/hoping, but...

> but maybe it's still not working perfectly yet.

...I still can't get more than 1 or 2 frames of dv w/the OHCI 1.0 VT6307 I'm
working with right now. :(

> I'm running out of ideas for why that still might not
> work so further testing or insights would be appreciated.

I'm rather short on ideas too. I was really hoping the dynamic buffer
allocation patch might help too, thinking maybe these cards were just
exhausting the buffer and getting wedged, but no dice.

Oh, I should also mention that I get some lockdep spew w/the dynamic buffer
alloc patch added to the mix... (will get that report over to you via
linux1394-devel though)

Jarod Wilson
jwilson redhat com

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