Fix backlight on Acer C720 i3 models

c720-i3-backlight.patch

From 41576ce101a70e44f5cf28dce5664c3449d5cc8d Mon Sep 17 00:00:00 2001
From: Charlie McConnell <charlie@charlieistheman.com>
Date: Mon, 25 Aug 2014 16:23:22 -0400
Subject: [PATCH] [drm/i915] Acer C720 i3 models have backlights

---
 drivers/gpu/drm/i915/intel_display.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index f39e90f..cdb43e0 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11671,6 +11671,9 @@ static struct intel_quirk intel_quirks[] = {
 	/* Acer C720 and C720P Chromebooks (Celeron 2955U) have backlights */
 	{ 0x0a06, 0x1025, 0x0a11, quirk_backlight_present },
 
+	/* Acer C720 and C720P Chromebooks (i3 4005U) have backlights */
+	{ 0x0a16, 0x1025, 0x0a11, quirk_backlight_present },
+
 	/* Toshiba CB35 Chromebook (Celeron 2955U) */
 	{ 0x0a06, 0x1179, 0x0a88, quirk_backlight_present },
 
-- 
2.1.0