[Intel-gfx] [PATCH 1/8] drm/i915/dp: retry link status read 3 times on failure

[Jesse Barnes]

On Tue, 05 Jul 2011 21:27:35 -0700
Eric Anholt <eric at anholt.net> wrote:

> On Fri,  1 Jul 2011 15:22:51 -0700, Jesse Barnes <jbarnes at virtuousgeek.org> wrote:
> > Especially after a hotplug or power status change, the sink may not
> > reply immediately to a link status query.  So retry 3 times per the spec
> > to really make sure nothing is there.
> 
> One thing we've been trying to do increasingly on the 3D side is cite
> chapter and verse in comments when we're doing something "per the spec"
> (which spec here?).  Clarifies whether it was some crazy workaround
> copying what the BIOS did at one point vs. something that we really are
> supposed to do.

Yeah good point, I'll point at the DP spec section stuff here when I
re-post.

Thanks,
-- 
Jesse Barnes, Intel Open Source Technology Center