tree 0d646851c4c643fe04cf1be31dbf9d6adfc29149
parent ed313489badef16d700f5a3be50e8fd8f8294bc8
author Keith Packard <keithp@keithp.com> 1225793007 -0800
committer Dave Airlie <airlied@redhat.com> 1227569244 +1000

drm/i915: Manage PIPESTAT to control vblank interrupts instead of IMR.

The pipestat fields affect reporting of all vblank-related interrupts, so we
have to reset them during the irq_handler, and while enabling vblank
interrupts.  Otherwise, if a pipe status field had been set to non-zero
before enabling reporting, we would never see an interrupt again.

This patch adds i915_enable_pipestat and i915_disable_pipestat to abstract
out the steps needed to change the reported interrupts.

Signed-off-by: Keith Packard <keithp@keithp.com>
Signed-off-by: Eric Anholt <eric@anholt.net>
Signed-off-by: Dave Airlie <airlied@redhat.com>