Re: framebuffer overlay
- Date: Wed, 12 Aug 2009 17:43:07 +0900
- From: "Dongsoo, Nathaniel Kim" <dongsoo.kim@xxxxxxxxx>
- Subject: Re: framebuffer overlay
On Wed, Aug 12, 2009 at 5:25 PM, Ryan Raasch<ryan.raasch@xxxxxxxxx> wrote:
> I am trying to write a driver for a camera using the new soc_camera in the
> mainline kernel the output is the overlay framebuffer (pxa270) and i would
> like to use the overlay output feature of v4l2 framework, but the
> framebuffer does not expose itself as a output device (not yet).
As far as I know the framebuffer of PXA2 even PXA3 can't be
categorized in a overlay device.
To be able to get used as overlay device by camera interface, I think
there should be a direct FIFO between camera and framebuffer which
means there is no need to copy memory from camera to fb. But
unfortunately PXA architecture is not supporting this kind of feature.
> Are there any fb that i can use as an example for this?
> From looking at the driver code, it seems like the generic code of fbmem.c
> needs a v4l2 device. Is this in the right ballpark?
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DongSoo, Nathaniel Kim
Mobile S/W Platform Lab.
Digital Media & Communications R&D Centre
Samsung Electronics CO., LTD.
e-mail : dongsoo.kim@xxxxxxxxx
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