drm/i915: disable sdvo hotplug on i945g/gm
authorDaniel Vetter <daniel.vetter@ffwll.ch>
Fri, 4 May 2012 09:29:56 +0000 (11:29 +0200)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Mon, 7 May 2012 08:37:56 +0000 (10:37 +0200)
commit768b107e4b3be0acf6f58e914afe4f337c00932b
tree7281cf2915bd7f64e40e309df9102e90fa5cf7e1
parentd48b97b403d23f6df0b990cee652bdf9a52337a3
drm/i915: disable sdvo hotplug on i945g/gm

Chris Wilson dug out a hw erratum saying that there's noise on the
interrupt line on i945G chips. We also have a bug report from a i945GM
chip with an sdvo hotplug interrupt storm (and no apparent cause).

Play it safe and disable sdvo hotplug on all i945 variants.

Note that this is a regression that has been introduced in 3.1,
when we've enabled sdvo hotplug support with

commit cc68c81aed7d892deaf12d720d5455208e94cd0a
Author: Simon Farnsworth <simon.farnsworth@onelan.co.uk>
Date:   Wed Sep 21 17:13:30 2011 +0100

    drm/i915: Enable SDVO hotplug interrupts for HDMI and DVI

Cc: stable@kernel.org
Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=38442
Reported-and-tested-by: Dominik Köppl <dominik@devwork.org>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-Off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/intel_sdvo.c