[Intel-gfx] [PATCH] drm/i915: disable sdvo hotplug on i945g/gm

[Daniel Vetter]

On Sat, May 05, 2012 at 02:45:29PM +0200, Daniel Vetter wrote:
> On Fri, May 04, 2012 at 11:29:56AM +0200, Daniel Vetter wrote:
> > 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.
> > 
> > Bugzilla: https://bugzilla.kernel.org/show_bug.cgi?id=38442
> > Reported-and-tested-by: Dominik Köppl <dominik at devwork.org>
> > Cc: Chris Wilson <chris at chris-wilson.co.uk>
> > Signed-Off-by: Daniel Vetter <daniel.vetter at ffwll.ch>
> 
> I've just realized 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 at onelan.co.uk>                                                                             
> Date:   Wed Sep 21 17:13:30 2011 +0100                                                                                               
>                                                                                                                                      
>     drm/i915: Enable SDVO hotplug interrupts for HDMI and DVI
> 
> Cc: stable at kernel.org

I've merged this patch to -fixes with Chris' irc r-b added.
-Daniel
-- 
Daniel Vetter
Mail: daniel at ffwll.ch
Mobile: +41 (0)79 365 57 48