drm/i915: Split VLV/CVH PIPESTAT handling into ack+handler

Minimize the amount of stuff we do with interrupt sources disabled by
splitting the PIPESTAT irq handling into ack+handler phases.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1460571598-24452-10-git-send-email-ville.syrjala@linux.intel.com
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
1 file changed