[Intel-gfx] [PATCH] Revert "drm/i915: Drop forcewake w/a for missed interrupts/seqno on Sandybridge"

[Chris Wilson]

On Tue, Aug 12, 2014 at 10:24:58AM +0100, Chris Wilson wrote:
> This reverts commit 67e5871be82fec1451801d448b51d9a403d1ffac.
> 
> The missed interrupts are back, in a big fashion. I am observing stalls
> followed by the missing interrupt warning on every Sandybridge+ machine
> I have (a mixture of Sandybridge, Ivybridge and Haswell).

Bad news, this alleviated the issue on ivb, but I am still hitting it on
snb. Oh well, back to the drawing board to figure out what's changed.
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre