[E3-hacking] [RFC] [PATCH 1/6] SoC Camera: add driver for OMAP1 camera interface

Marin Mitov mitov at issp.bas.bg
Thu Aug 19 13:16:21 BST 2010

On Thursday, August 19, 2010 02:39:47 pm Guennadi Liakhovetski wrote:
> On Thu, 19 Aug 2010, Janusz Krzysztofik wrote:
> > Hi Marin,
> > Since I've finaly managed to make use of your method without any previously 
> > observerd limitations (see below), I'm interested in it being implemented 
> > system-wide. Are you going to submit a patch?

It is ready, I just wait for the invitation.

Marin Mitov

> I'm about to submit a patch, which you'll be most welcome to test. Just 
> give me a couple more hours.
> > I would suggest creating one common function that allocates and fills the 
> > dev->dma_mem structure, and two wrappers that call it: a 
> > dma_declare_coherent_memory() replacement, that passes an ioremapped device 
> > memory address to the common fuction, and your proposed 
> > dma_reserve_coherent_memory(), that passes a pointer returned by the 
> > dma_alloc_coherent() instead.

> No, I don't think you should go to the next power of 2 - that's too crude. 
> Try rounding your buffer size to the page size, that should suffice.

Allocated coherent memory is always a power of 2.

Marin Mitov

> Thanks
> Guennadi
> ---
> Guennadi Liakhovetski, Ph.D.
> Freelance Open-Source Software Developer
> http://www.open-technology.de/

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