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Subject: RE: [st-ericsson] v4l2 vs omx for camera
From: Edward Hervey <bilboed@gmail.com>
To: Marek Szyprowski <m.szyprowski@samsung.com>
Cc: 'Nicolas Pitre' <nicolas.pitre@linaro.org>,
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	'Laurent Pinchart' <laurent.pinchart@ideasonboard.com>
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Date: Tue, 01 Mar 2011 11:25:45 +0100
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On Mon, 2011-02-28 at 09:50 +0100, Marek Szyprowski wrote:
> Hello,
[...]
> 
> I'm not sure that highmem is the right solution. First, this will force
> systems with rather small amount of memory (like 256M) to use highmem just
> to support DMA allocable memory. It also doesn't solve the issue with
> specific memory requirement for our DMA hardware (multimedia codec needs
> video memory buffers from 2 physical banks).

  Could you explain why a codec would require memory buffers from 2
physical banks ?

  Thanks,

   Edward

> 
> The relocation issue has been already addressed in the last CMA patch series.
> Michal managed to create a framework that allowed to relocate on demand any
> pages from the CMA area.
> 
> Best regards
> --
> Marek Szyprowski
> Samsung Poland R&D Center
> 
>