[Intel-gfx] [PATCH] drm/i915: Addin-offset is an unreliable indicator of LVDS present

[Chris Wilson]

On Mon, 23 Aug 2010 10:46:33 -0400, Adam Jackson <ajax at redhat.com> wrote:
> AIM seems to be structured such that you have to have an addin to make
> LVDS work.  I think the opregion change you posted is sufficient to find
> the real VBT; having done that, the addin offset check is still valid.

Sadly, I discovered this after enabling the OpRegion->VBT. The Samsung
went from finding no VBT to declaring the LVDS absent. :(

I am on the scrounge for documentation on how this all meant to hang
together. Reality will be different, but it would be nice to know what the
fields are supposed to mean.

> If the platform would give us some actually reliable method of doing
> LVDS detection then we could skip all this, but.

Amen.
-- 
Chris Wilson, Intel Open Source Technology Centre