From: Tomi Valkeinen <tomi.valkeinen@ti.com>
Date: Thu, 19 Sep 2013 09:59:57 +0000 (+0300)
Subject: OMAPDSS: DISPC: set irq_safe for runtime PM
X-Git-Tag: v3.12-rc3~20^2~6
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=48664b21aeeffb40c5fa06843f18052e2c4ec9ef;p=pandora-kernel.git

OMAPDSS: DISPC: set irq_safe for runtime PM

We have a bug with omapdrm, where omapdrm calls dispc's pm_runtime
function in atomic context, and dispc's pm_runtime is not marked as
irq_safe:

BUG: sleeping function called from invalid context at drivers/base/power/runtime.c:952

Dispc's runtime PM callbacks are irq safe, so we can just set the
irq_safe flag to fix the issue.

However, in the long term, I'd rather have omapdrm manage the runtime PM
calls in a better way. Calling get/put for every small operation that
touches the dispc registers is very inefficient. It'd be better and
cleaner to have clear "in-use" and "not-in-use" states for dispc, so
that we don't need to do register context restore for small operations,
only to turn dispc off right afterwards.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
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