[PATCH] drm/i915: Ignore VBT backlight presence check on Acer C720 (4005U)

From: Scot Doyle <lkml14@scotdoyle.com>
To: intel-gfx@lists.freedesktop.org
Cc: Jani Nikula <jani.nikula@intel.com>,
	Daniel Vetter <daniel.vetter@ffwll.ch>,
	Tyler Cleveland <siralucardt@openmailbox.org>
Subject: [PATCH] drm/i915: Ignore VBT backlight presence check on Acer C720 (4005U)
Date: Thu, 21 Aug 2014 16:08:02 +0000 (UTC)	[thread overview]
Message-ID: <alpine.LNX.2.11.1408211604320.2057@localhost.localdomain> (raw)

commit c675949ec58ca50d5a3ae3c757892f1560f6e896
    drm/i915: do not setup backlight if not available according to VBT

prevents backlight setup on the Acer C720 (Core i3 4005U CPU), which has a
misconfigured VBT. Apply quirk to ignore the VBT backlight presence check
during backlight setup.

Signed-off-by: Scot Doyle <lkml14@scotdoyle.com>
Tested-by: Tyler Cleveland <siralucardt@openmailbox.org>
Cc: Jani Nikula <jani.nikula@intel.com>
Cc: Daniel Vetter <daniel.vetter@ffwll.ch>
---
 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 0b327eb..3d4a4eb 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12553,6 +12553,9 @@ static struct intel_quirk intel_quirks[] = {
 	/* Acer C720 and C720P Chromebooks (Celeron 2955U) have backlights */
 	{ 0x0a06, 0x1025, 0x0a11, quirk_backlight_present },

+	/* Acer C720 Chromebook (Core i3 4005U) */
+	{ 0x0a16, 0x1025, 0x0a11, quirk_backlight_present },
+
 	/* Toshiba CB35 Chromebook (Celeron 2955U) */
 	{ 0x0a06, 0x1179, 0x0a88, quirk_backlight_present },

-- 
1.7.10.4
