[Intel-gfx] [PATCH 05/10] drm/i915/icl: Trim down posting reads on master intr control

[Chris Wilson]

Quoting Mika Kuoppala (2018-09-20 15:33:45)
> If we return a master control value on disable, it will act
> as a posting read and further streamline our interrupt handler.
> We can then safely use the inlined helpers on irq reset
> and on postinstall. Posting read on postinstall is
> superfluous as nothing beneath it is depedent.
> 
> Cc: Chris Wilson <chris at chris-wilson.co.uk>
> Signed-off-by: Mika Kuoppala <mika.kuoppala at linux.intel.com>

Ok, this adds more weight to patch 4. The question about extending the
pattern back as far as it goes still applies :)

Reviewed-by: Chris Wilson <chris at chris-wilson.co.uk>
-Chris