On Tue, 21 Dec 2010 10:14:51 -0800, Keith Packard <kei...@keithp.com> wrote: > On Tue, 21 Dec 2010 11:36:44 +0000, Chris Wilson <ch...@chris-wilson.co.uk> > wrote: > > > 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... > > That probably depends on the panel having DDC, which many don't, right? > Maybe we can assume the SDV panels do?
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). -Chris -- Chris Wilson, Intel Open Source Technology Centre _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
