From 050eff39af6a395104df85b7ca59f0a4245e04f8 Mon Sep 17 00:00:00 2001
From: "Lee, Chun-Yi" <joeyli.kernel@gmail.com>
Date: Mon, 21 May 2012 23:19:51 +0800
Subject: [PATCH] acer-wmi: add 3 laptops to video backlight vendor mode quirk
 table

Acer Extensa 5235, TravelMate 5760 and Aspire 5750 laptop have broken _BCM
implemenation, the AML code wrote value to EC register but firmware didn't
change brighenss.

Fortunately, the brightness control works on those machines with vendor mode.
So, add this machine to video backlight vendor mode quirk table.

Reference: bko#36322
        https://bugzilla.kernel.org/show_bug.cgi?id=36322
Reference: bko#42833
        https://bugzilla.kernel.org/show_bug.cgi?id=42833
Reference: bko#42993
        https://bugzilla.kernel.org/show_bug.cgi?id=42993

Cc: Christopher M. Penalver <christopher.penalver@gmx.com>
Cc: Bence Lukacs <lukacs.bence1@gmail.com>
Cc: Joern Heissler <kernelbugs2012@joern.heissler.de>
Cc: Carlos Corbacho <carlos@strangeworlds.co.uk>
Cc: Matthew Garrett <mjg@redhat.com>
Cc: Dmitry Torokhov <dtor@mail.ru>
Cc: Corentin Chary <corentincj@iksaif.net>
Cc: Thomas Renninger <trenn@suse.de>
Signed-off-by: Lee, Chun-Yi <jlee@suse.com>
Signed-off-by: Matthew Garrett <mjg@redhat.com>
---
 drivers/platform/x86/acer-wmi.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/platform/x86/acer-wmi.c b/drivers/platform/x86/acer-wmi.c
index c1a3fd8e1243..ce875dc365e5 100644
--- a/drivers/platform/x86/acer-wmi.c
+++ b/drivers/platform/x86/acer-wmi.c
@@ -523,6 +523,30 @@ static const struct dmi_system_id video_vendor_dmi_table[] = {
 			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 4750"),
 		},
 	},
+	{
+		.callback = video_set_backlight_video_vendor,
+		.ident = "Acer Extensa 5235",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Extensa 5235"),
+		},
+	},
+	{
+		.callback = video_set_backlight_video_vendor,
+		.ident = "Acer TravelMate 5760",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "TravelMate 5760"),
+		},
+	},
+	{
+		.callback = video_set_backlight_video_vendor,
+		.ident = "Acer Aspire 5750",
+		.matches = {
+			DMI_MATCH(DMI_BOARD_VENDOR, "Acer"),
+			DMI_MATCH(DMI_PRODUCT_NAME, "Aspire 5750"),
+		},
+	},
 	{}
 };