[Intel-gfx] gen7 missed IRQ workaround series.

[Eugeni Dodonov]

On Thu, Dec 22, 2011 at 20:54, Eric Anholt <eric at anholt.net> wrote:

> This is the minimal patchset I have for working around the missed
> IRQs.  I've been running it since Monday doing test runs for other
> work, and it appears to be stable.
>

Works for me, no more missed IRQs nor hangs/delays with this patchset.

I have one questions though - would it be possible to control the
interrupts behavior via a module parameter or debugfs entry to simplify
debugging of this issue going forward?

For example, something like /sys/kernel/debug/dri/0/i915_irq_polling -
writing '1' there would enable polling, and '0' would use the usual
gen6_ring_get_irq. This would default to '1' on gen7, and '0' on older
architectures.

Other than that,
Tested-by: Eugeni Dodonov <eugeni.dodonov at intel.com>
Reviewed-by: Eugeni Dodonov <eugeni.dodonov at intel.com>

-- 
Eugeni Dodonov
<http://eugeni.dodonov.net/>
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