From: Ben Widawsky <ben@bwidawsk.net>
Date: Mon, 25 Apr 2011 18:25:20 +0000 (-0700)
Subject: drm/i915: move gen6 rps handling to workqueue
X-Git-Tag: v3.0-rc1~312^2~4^2~25
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=4912d04193733a825216b926ffd290fada88ab07;p=pandora-kernel.git

drm/i915: move gen6 rps handling to workqueue

The render P-state handling code requires reading from a GT register.
This means that FORCEWAKE must be written to, a resource which is shared
and should be protected by struct_mutex. Hence we can not manipulate
that register from within the interrupt handling and so must delegate
the task to a workqueue.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Keith Packard <keithp@keithp.com>
---

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