Yeah, the utter lack of a vbt fits very nicely, thanks for checking, I've merged the patch into drm-intel-fixes and will forward it for inclusion into 3.7 rsn.
Great, thanks. One thing about that patch: if we would ever encounter a non-zero edp.bpp < 3, display_bpc would not be clamped. I suppose monochrome screens went out of fashion twenty years ago, but who knows...
Thanks, Henrik