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

[Keith Packard]

On Tue, 21 Dec 2010 19:55:15 +0000, Chris Wilson <chris at chris-wilson.co.uk> wrote:

> The test we do is simply whether the LVDS i2c pins are addressable. That
> requires differentiating between an IO error and a NAK, which at present
> is only possible using GMBUS. The reference to this method I found in the
> BIOS writers' guide, but of course that doesn't actually explain how it
> works (especially the significance of address 0xa0).

I can't see how that would work without an i2c receiver on the DDC
bus...

But, then, I've been surprised by DDC in the past, so perhaps it's worth
a test on a device that has LVDS but does not have EDID.

-- 
keith.packard at intel.com
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