[Intel-gfx] [PATCH] drm/i915: no LVDS on Intel SandyBridge SDVs

[Chris Wilson]

On Mon, 20 Dec 2010 18:53:14 -0800, Jesse Barnes <jbarnes at virtuousgeek.org> wrote:
> On Tue, 21 Dec 2010 12:43:38 +1000
> Dave Airlie <airlied at gmail.com> wrote:
> 
> > On Tue, Dec 21, 2010 at 6:05 AM, Jesse Barnes <jbarnes at virtuousgeek.org> wrote:
> > > Add a DMI match entry for the SDV to indicate it has no LVDS present.
> > 
> > Sounds wrong, generally the SDVs can get an LVDS panel plugged into
> > them, so they have an LVDS connector.
> 
> Yeah I think there's actually a header on this board for LVDS so it
> would be better to have a way to detect that.  I don't know what that
> method would be though...

I think once upon a time I found a reliable method in the docs:
intel_lvds_ddc_probe(). However that only seemed to work over GMBUS...

Jesse, can you try disabling bus->force_bit in intel_i2c.c and see if that
probe method still works?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre