Apple M9179LL/A 30" Widescreen LCD with rv280

[Alex Deucher]

On Sat, 26 Feb 2005 13:07:41 +1100, Benjamin Herrenschmidt
<benh at kernel.crashing.org> wrote:
> On Fri, 2005-02-25 at 20:54 -0500, Alex Deucher wrote:
> > On Sat, 26 Feb 2005 12:19:37 +1100, Benjamin Herrenschmidt
> > <benh at kernel.crashing.org> wrote:
> > > On Fri, 2005-02-25 at 09:21 -0500, Alex Deucher wrote:
> > > > On Fri, 25 Feb 2005 14:07:58 +0100, Esben Stien <b0ef at esben-stien.name> wrote:
> > > > > I'm planning on getting the M9179LL/A; it's a Apple 30" Widescreen
> > > > > LCD, http://www.apple.com/displays/ - probably Samsung or Viewsonic
> > > > > OEM. If anyone knows please tell.
> > > > >
> > > > > I intend to run this with a rv280 gpu, Radeon 9250 on GNU/Linux. This
> > > > > card features a single link DVI which is not sufficient to run the LCD
> > > > > in native resolution, 2560x1600. I will run in 1280x800/1920x1200
> > > > > until a card is out that is supported with libre software. I have seen
> > > > > this monitor operate at 1280x800/1920x1200 and it's blurryness is
> > > > > acceptable for a short term solution.
> > > > >
> > > >
> > > > some of the newer ati r3/4xx cards have a dual-link tmds transmitter
> > > > connected to the DVO port (the firegl v5000 or v5100 come to mind,
> > > > perhaps some oems as well).  The driver should already support the
> > > > external tmds transmitter, however, it may need some hacks to
> > > > initialize it correctly in duallink mode.  If you had such a card, I
> > > > can probably help you get dual-link mode up and running.
> > >
> > > Do you know how to talk to the external transmitter at all ?
> >
> > only via fp2_gen_cntl and friends.  however I think that's all you need.
> 
> Not sure... At one point, Hui was implying for example that we may have
> flickering on the external TMDS because we can't properly configure it
> for higher frequencies as we don't know how to talk to it. (The way we
> configure the internal one via TMDS_TRANSMITTER_CNTL etc...)
> 

good point.  I dunno, I guess we'll find out.  I plan to get a dual
dvi card soon to test with so hopefully I can start to sort that out.

Alex

> Ben.
> 
>