[Intel-gfx] [PATCH] drm/i915: Workaround CRT detect issue for Ironlake

[Eric Anholt]

On Wed, 9 Dec 2009 17:06:02 +0800, Zhenyu Wang <zhenyuw at linux.intel.com> wrote:
> On 2009.12.08 23:33:23 -0800, Eric Anholt wrote:
> > On Wed,  9 Dec 2009 10:04:13 +0800, Zhenyu Wang <zhenyuw at linux.intel.com> wrote:
> > > We found when VGA port is on before detect sequence, it
> > > could cause infinite polling loop in checking hotplug
> > > status. This workaround trys to disable analog port before
> > > detect, then after detect restore back the origin state.
> > 
> > This seems like yet another instance of "we need to turn off hotplug
> > detection during the detection process" -- can we just do that already?
> 
> well, although I'm not sure about other instance of this, I think ddc probe
> for Ironlake should be no problem.

You mean just using DDC-based probing only?  That wouldn't work, because
VGA isn't guaranteed to have DDC.
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