From: Keith Packard <keithp@keithp.com>
Date: Tue, 4 Nov 2008 10:03:27 +0000 (-0800)
Subject: drm/i915: Manage PIPESTAT to control vblank interrupts instead of IMR.
X-Git-Tag: v2.6.28-rc7~46^2~7
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=7c463586427bbbad726ba561bae4ba5acada2481;p=pandora-kernel.git

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>
---

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