[Intel-gfx] [PATCH 1/2] drm/i915: Revert hdmp HDP pin checks

[Chris Wilson]

On Fri, Feb 22, 2013 at 12:53:04AM +0100, Daniel Vetter wrote:
> This reverts
> 
> commit 8ec22b214d76773c9d89f4040505ce10f677ed9a
> Author: Chris Wilson <chris at chris-wilson.co.uk>
> Date:   Fri May 11 18:01:34 2012 +0100
> 
>     drm/i915/hdmi: Query the live connector status bit for G4x
> 
> and
> 
> commit b0ea7d37a8f63eeec5ae80b4a6403cfba01da02f
> Author: Damien Lespiau <damien.lespiau at intel.com>
> Date:   Thu Dec 13 16:09:00 2012 +0000
> 
>     drm/i915/hdmi: Read the HPD status before trying to read the EDID
> 
> They reliably cause HDMI to not be detected on some systems (like my
> ivb or the bug reporters gm45). To fix up the very slow unplug issues
> we might want to fire up a 2nd detect cycle a few hundred ms after
> each hotplug. But for now at least make displays work again.
> 
> I somewhat suspect that this is confined to HDMI connectors, since all
> the machines I have with DP+ outputs work correctly.
> 
> Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=52361
> Cc: Damien Lespiau <damien.lespiau at intel.com>
> Cc: Jani Nikula <jani.nikula at intel.com>
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Signed-off-by: Daniel Vetter <daniel.vetter at ffwll.ch>

I wish we had a solid explanation here, because the status bit sounds
exactly what we need here. Reality is such a let down.

Acked-by: Chris Wilson <chris at chris-wilson.co.uk>
Cc: stable at vger.kernel.org.kernel.org # for 8ec22b21
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre