[Intel-gfx] Dear Intel: please document SDVO LVDS option block

[Adam Jackson]

On Wed, 2011-10-19 at 10:28 -0400, Adam Jackson wrote:

> I assume the SDVO LVDS options block in the VBT would tell us what bits
> are correct to program here, but intel_bios.h documents only the layout
> of that structure, not its content.  Or, we can hope that the SDVO card
> set it up correctly for us (hah).
> 
> Intel people, care to shed some light here?

Just re-raising this.  I suspect we can't support SDVO LVDS correctly
without knowing more here.  In particular:

- what "panel type" means in struct bdb_sdvo_lvds_options
- what the "misc bits" mean in same
- whether the BIOS AIM code can be relied on to have set
depth/type/channel correctly or if that's the driver's job

- ajax
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