From: Chris Wilson <chris@chris-wilson.co.uk>
Date: Sun, 13 Oct 2013 11:56:31 +0000 (+0100)
Subject: drm/i915: Add breadcrumbs for why the backlight is being set
X-Git-Tag: v3.13-rc1~76^2~68^2~68
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=540b5d02766863c561afe9f9d56ce0425022a731;p=pandora-kernel.git

drm/i915: Add breadcrumbs for why the backlight is being set

At the moment we have 3 paths that lead to actually_set_backlight(),
from modesetting, ACPI/OpRegion requests and our very own
intel_backlight interface, and we have no way of distinguishing them in
the debug log. So add a debug breadcrumb to explain the source of the
backlight changes.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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