drm/i915/tv: Use polling rather than interrupt-based hotplug
commit8102e126c0827b5336065fd86d3d313b60fde23a
authorChris Wilson <chris@chris-wilson.co.uk>
Thu, 10 Feb 2011 10:05:35 +0000 (10 10:05 +0000)
committerChris Wilson <chris@chris-wilson.co.uk>
Fri, 11 Feb 2011 09:20:51 +0000 (11 09:20 +0000)
treeed08a21ae4229034468e3d8f6e6169e0310b01a7
parent1aad7ac0458f40e2d0365d488620084f3965f6e7
drm/i915/tv: Use polling rather than interrupt-based hotplug

The documentation recommends that we should use a polling method for TV
detection as this is more power efficient than the interrupt based
mechanism (as the encoder can be completely switched off). A secondary
effect is that leaving the hotplug enabled seems to be causing pipe
underruns as reported by Hugh Dickins on his Crestline.

Tested-by: Hugh Dickins <hughd@google.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
[This is a candidate for stable, but needs minor porting to 2.6.37]
drivers/gpu/drm/i915/intel_tv.c