Re: [Linux-fbdev-devel] [PATCH]: EDID parser

[Alan Cox]

On Iau, 2003-04-03 at 18:10, Sven Luther wrote:
> It has two outputs, where i can hook either a DVI or a VGA monitor. Each
> of these video outputs correspond to a viewport, and there is hardware
> which will let you set the output timings and the dot clock. You also
> have to configure which part of the framebuffer you are reading, and
> eventually setup a scaller to scale the pixels you read to the correct
> output buffer. You also have for each head a DDC/I2C bus you can use to
> speak with the monitor.

Very common except lower end stuff generally has a single frame buffer
that both show and cannot be split or scanned by multiple outputs at
different rates.