linux-kernel - Re: [PATCH 2/4 v4] i.MX31: Image Processing Unit DMA and IRQ drivers

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Message-ID: <20081222200337.GD9472@pengutronix.de>
Date:	Mon, 22 Dec 2008 21:03:37 +0100
From:	Robert Schwebel <r.schwebel@...gutronix.de>
To:	Guennadi Liakhovetski <g.liakhovetski@....de>,
	linux-kernel@...r.kernel.org,
	linux-fbdev-devel@...ts.sourceforge.net, adaplas@...il.com,
	linux-arm-kernel@...ts.arm.linux.org.uk,
	Dan Williams <dan.j.williams@...el.com>
Subject: Re: [PATCH 2/4 v4] i.MX31: Image Processing Unit DMA and IRQ
	drivers

On Mon, Dec 22, 2008 at 07:37:53PM +0100, Sascha Hauer wrote:
> Another thing is the overlay framebuffer. I think it's mainly useful
> to display video streams.

Right. The idea is that you can push a video stream into /dev/fb1 (for
example by using the gstreamer fbdev sink) while displaying widgets from
a GUI toolkit on /dev/fb0.

> Maybe it's better to implement this as a v4l device as unlike the
> framebuffer API the v4l API is designed to handle different image
> buffers.

Huh? v4l is image-frames-to-userspace, not vice versa.

rsc
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