[Intel-gfx] [PATCH] honor VBIOS SSC & TV settings

[Jesse Barnes]

On Monday, June 30, 2008 9:36 am Jesse Barnes wrote:
> On Monday, June 30, 2008 2:24 am Jin, Gordon wrote:
> > Jesse,
> >
> > I tested your patch on my Thinkpad T61 (GM965) and R52 (915GM, with
> > SVideo TV-out). It works as before, i.e.
> > https://bugs.freedesktop.org/show_bug.cgi?id=11366 isn't happening on
> > T61.
>
> Good, thanks for testing.  I'm glad it doesn't break anything.
>
> > There's no SSC info in Xorg log. Is this expected? How can I know if the
> > external reference clock is actually available?
>
> Hm, on my T61 the SSC clock is used:
> (II) intel(0): using SSC reference clock of 100 MHz
>
> As long as the LVDS init function finds that the SSC enable bit is set in
> the VBIOS "general features" table, it should get enabled.
>
> > Below is the xrandr output:
> >
> > [root at x-gm965 ~]# xrandr -q
> > Screen 0: minimum 320 x 200, current 1280 x 800, maximum 2000 x 2000
> > VGA disconnected (normal left inverted right x axis y axis)
> > LVDS connected 1280x800+0+0 (normal left inverted right x axis y axis)
> > 331mm x 207mm
> >    1280x800       60.3*+   50.0
> >    1024x768       60.0
> >    800x600        60.3     56.2
> >    640x480        59.9
> > TMDS-1 disconnected (normal left inverted right x axis y axis)
> >
> >   [root at x-915gm ~]# xrandr -q
> > Screen 0: minimum 320 x 200, current 1024 x 768, maximum 2048 x 2048
> > VGA disconnected (normal left inverted right x axis y axis)
> > LVDS connected 1024x768+0+0 (normal left inverted right x axis y axis)
> > 0mm x 0mm
> >    1024x768       60.0*+   85.0     75.0     70.1     60.0
> >    832x624        74.6
> >    800x600        85.1     72.2     75.0     60.3     56.2
> >    640x480        85.0     72.8     75.0     59.9
> >    720x400        85.0
> >    640x400        85.1
> >    640x350        85.1
> > TV disconnected (normal left inverted right x axis y axis)
>
> Hm, this shows that the TV is present but disconnected.  So neither SSC nor
> TV out detection are working for you.  Are you sure you're running the
> patched code?  If so, then there may be more than one model of T61 or VBIOS
> we have to worry about here...

Oops, I didn't see that the second one was your 915GM box.  Does it actually 
have a TV out connector?  If so, maybe things are working ok, since it looks 
like your T61 detects the lack of a TV connector correctly.

Jesse