[cpia] a new CVS branch for a .v4l2 driver for 2.5.x kernel

[Duncan Haldane]

Great!

I noticed Nick had committed.   Its good to know the 2.5 cpia code is now
working with parport webcams. I haven't yet managed to get USB working under
2.5.x (the modules load but neither cpia nor other usb devices are getting
activated - its nothing specific to the cpia driver ...) 

This was with 2.5.43 and 2.5.44-ac1.   I'll try again with 2.5.44-ac2 which now
has the full cpia update I sent to Alan Cox.   (I sent it before the fixes Nick 
committed, so I'll send another update hopefully after I get usb working,
but if I can't, I won't delay the patch).

I suppose this means that Linus will take the patch from Alan, and we are in
before the 2.5.x feature freeze.....

So Peter Pregler's and Scott Bertin's work will live on for posterity in future
kernels....


One thing that didn't make it from 2.2 into 2.4 was DMA support for the
parport. (#ifdef CONFIG_VIDEO_CPIA_PP_DMA  code).
This was stripped from cpia_pp.c in the official kernel sources, but is there
in the sourceforge cpia/module code (but not in the 2.5 code in module-v4l2)

This needed some extra support to be patched into the 2.2 kernel, and
some people on this list have mentioned working on it for 2.4 
in  the past.  
Does the 2.5 kernel contain some generic DMA access feature that cpia_pp.c could
use?  Does DMA make a noticeable improvement for parport cameras?
 


Duncan



On 23-Oct-2002 Nick Holloway wrote:
> I've committed a couple of changes to the cpia driver in the module-v4l2
> directory over the last few days.
> 
> The first was a fix for some unmatched down/up calls on a couple of the
> camera semaphores.  This caused ioctl to hang.
> 
> The second was a fix to ensure the module counts for cpia_pp and cpia_usb
> are maintained when the camera is opened and closed.  This prevents them
> being unloaded when the camera was in use.

 
> The parport cpia camera now works for me with the 2.5.44 kernel (Creative
> WebCam II).  If somebody has the USB camera, this version needs to
> be tested.
> 
> -- 
>  `O O'  | Nick.Holloway@pyrites.org.uk
> // ^ \\ | http://www.pyrites.org.uk/
> 
> _______________________________________________
> cpia mailing list  -  cpia@risc.uni-linz.ac.at
> http://mailman.risc.uni-linz.ac.at/mailman/cgi-bin/listinfo/cpia

----------------------------------
E-Mail: Duncan Haldane <f.duncan.m.haldane@worldnet.att.net>
Date: 23-Oct-2002
Time: 21:53:42

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