[Intel-gfx] [PATCH] drm/i915: paper over missed irq issues with force wake vodoo

[Keith Packard]

On Wed,  4 Jan 2012 19:40:45 +0100, Daniel Vetter <daniel.vetter at ffwll.ch> wrote:

> Two things seem to do the trick on my ivb machine here:
> - prevent the gt from powering down while waiting for seqno
>   notification interrupts by grabbing the force_wake in get_irq (and
>   dropping it in put_irq again).
> - ordering writes from the ring's CS by reading a CS register, ACTHD
>   seems to work.

If this works reliably, you'll deserve a medal...

-- 
keith.packard at intel.com
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