[MPlayer-dev-eng] Re: will there be further development for matroxg450 cards?

[Ville Syrjälä]

On Thu, Jun 03, 2004 at 07:35:00PM -0400, D Richard Felker III wrote:
> On Thu, Jun 03, 2004 at 06:31:22PM +0200, justin case wrote:
> > > > a question to the developers regarding matrox g450 support:
> > > >
> > > > i've had enourmous trouble trying to get a matrox g450 to display video
> > on
> > > > the tv-out and found it actually not to be supported. tv-out worked via
> > > > matroxfb but with ugly effects probably from lack of proper buffering (i
> > got
> > > > nasty "cuts" in the middle of the picture, looked like the next frame
> > was
> > > > overlapping..), so i found it to be unusable.
> > >
> > > The situation is no different with the g400. You have to use -vo mga,
> > > not fbdev, and that means you have to put the primary head on the
> > > tvout and the secondary junk one on the monitor. Or you can just
> > > mirror the same (primary) to both heads and forget about the horrible
> > > unaccelerated "fb1".
> > 
> > after a few days of researching the topic i figured, that only the g400 has
> > proper tv-out support and that there is no way to get around the
> > unaccelerated fb1 with the 450. i'd be happy if you'd correct me on this one
> > ;)
> 
> The way you get around it is the same as on the g400: don't use it!
> Instead use the accelerated fb0 and map it to the tv.

That doesn't work on G450/G550. Only CRTC2 can drive the (integrated) TV 
encoder. Also the G450/G550 TV encoder is more limited than the G400's 
maven chip (no scaling/filtering). I think they are both based on Zoran 
CVE2 core.

> > what i actually read was that matrox had once given out specs for the g400
> > and so tv-out became possible with that card, but the g450 works a bit
> > different internally and matrox all of a sudden refused to help with specs
> > for that card.
> 
> This is basically true but I don't think it matters for our particular
> situation. However I've never used a g450 so I can't be sure.

The G400 specs don't include information on TV-out.

-- 
Ville Syrjälä
syrjala at sci.fi
http://www.sci.fi/~syrjala/