From: Luca Tettamanti <kronos.it@gmail.com>
Date: Thu, 2 Aug 2012 13:30:27 +0000 (+0200)
Subject: ACPI video: allow events handlers to veto the keypress
X-Git-Tag: omap-for-v3.7-rc1/fixes-cpufreq-signed~20^2~3^2~58
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=8a37c65df9dcbd1c891df2b4a94157999b654841;p=pandora-kernel.git

ACPI video: allow events handlers to veto the keypress

The standard video events may be overloaded for device specific
purposes. For example AMD ACPI interface overloads
ACPI_VIDEO_NOTIFY_PROBE (0x81) to signal AMD-specific events. In such
cases we don't want to send the keypress (KEY_SWITCHVIDEOMODE) to the
userspace because the user did not press the mode switch key (the
spurious keypress confuses the DE which usually changes the
display configuration and messes up a dual-screen setup).
This patch gives the handlers the chance to examine the event and
block the keypress if the event is device specific.
v2: refactor as suggested by Zhang Rui <rui.zhang@intel.com>

Signed-off-by: Luca Tettamanti <kronos.it@gmail.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
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