TV Out control and Product selection.

TV Out control and Product selection.

[Francis Reader]

Is it me, or is it becoming extremley difficult to spec a card that supports
one of the many fb drivers, AND allow you to control the "tv out"
capabilities on board.

Most of the drivers I've come across allow you to control the TV Dacs
through X, but have put very little effort in providing fb support for the
same device.

ATI are refusing to talk due to IP issues with Macrovision, NVidia only
support this functionality through the XFree driver, the SiS driver
currently has no standard way of controlling this.

Francis Reader


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Re: TV Out control and Product selection.

[Petr Vandrovec]

On Mon, Aug 19, 2002 at 03:52:49PM +0100, Francis Reader wrote:
> Is it me, or is it becoming extremley difficult to spec a card that supports
> one of the many fb drivers, AND allow you to control the "tv out"
> capabilities on board.

What you want to control?
 
> Most of the drivers I've come across allow you to control the TV Dacs
> through X, but have put very little effort in providing fb support for the
> same device.
> 
> ATI are refusing to talk due to IP issues with Macrovision, NVidia only
> support this functionality through the XFree driver, the SiS driver
> currently has no standard way of controlling this.

Matrox also refuses to document it... but because of Matrox refuses to
release docs for anything after G400, it is not big surprise. 

matroxfb from 2.5.32, or patches from 
ftp://platan.vc.cvut.cz/pub/linux/matrox-latest/*-tvo*.gz allow you
to use TVOut on G450/G550. TVOut on G400 is supported for years.

Patch from platan has an additional feature which allows you to change
brightness/contrast by using 'v4lctl -c /dev/fb0 bright ...'. matroxfb
supports only composite/svhs output, rgb scart is not supported without
changing sources.

Please note that G450/G550 hardware can do TV output only from /dev/fb1,
so you are limited to 15/16/32bpp, without gamma correction, and with
matroxfb also unaccelerated.
						Petr Vandrovec
						vandrove@vc.cvut.cz
							


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