[Intel-gfx] i915 irq storm mitigation in 3.10

[Egbert Eich]

Daniel Vetter writes:
 > 
 > I've checked the docs again for gm45 and we seem to have the right
 > values. But on early gen4 (i.e. i965g/gm) the Bspec has been wrong
 > about these, so I wouldn't be surprised at all if they're wrong for
 > the digital ports on gm45, too.
 > 
 > Iirc we've already had a case like that, but there was no real
 > conclusion (and atm I can't find the bug). Can you pls try the below
 > patch (on top of Egbert's debug stuff)?
 > 
If this doesn't help, lets disable all the digital ports together for
testing.

 > 
 > 
 > Egbert I think your debug patch has fairly useful information for
 > debugging the storm code in general, can you please submit a patch
 > against drm-intel-nightly?
 > 

Will do :)

Cheers,
	Egbert.