[st-ericsson] v4l2 vs omx for camera

[Hans Verkuil]

On Friday, February 25, 2011 18:22:51 Linus Walleij wrote:
> 2011/2/24 Edward Hervey <bilboed at gmail.com>:
> 
> >  What *needs* to be solved is an API for data allocation/passing at the
> > kernel level which v4l2,omx,X,GL,vdpau,vaapi,... can use and that
> > userspace (like GStreamer) can pass around, monitor and know about.
> 
> I think the patches sent out from ST-Ericsson's Johan Mossberg to
> linux-mm for "HWMEM" (hardware memory) deals exactly with buffer
> passing, pinning of buffers and so on. The CMA (Contigous Memory
> Allocator) has been slightly modified to fit hand-in-glove with HWMEM,
> so CMA provides buffers, HWMEM pass them around.
> 
> Johan, when you re-spin the HWMEM patchset, can you include
> linaro-dev and linux-media in the CC?

Yes, please. This sounds promising and we at linux-media would very much like
to take a look at this. I hope that the CMA + HWMEM combination is exactly
what we need.

Regards,

	Hans

> I think there is *much* interest
> in this mechanism, people just don't know from the name what it
> really does. Maybe it should be called mediamem or something
> instead...
> 
> Yours,
> Linus Walleij
> 
> 

-- 
Hans Verkuil - video4linux developer - sponsored by Cisco