This is a note to let you know that I've just added the patch titled
drm/i915: Ignore VBT backlight presence check on Acer C720 (4005U)
to the 3.16-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-i915-ignore-vbt-backlight-presence-check-on-acer-c720-4005u.patch
and it can be found in the queue-3.16 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
>From dfb3d47b2369ad752ab9f7438bbf9949524b46ae Mon Sep 17 00:00:00 2001
From: Scot Doyle <lkml14@xxxxxxxxxxxxx>
Date: Thu, 21 Aug 2014 16:08:02 +0000
Subject: drm/i915: Ignore VBT backlight presence check on Acer C720 (4005U)
From: Scot Doyle <lkml14@xxxxxxxxxxxxx>
commit dfb3d47b2369ad752ab9f7438bbf9949524b46ae upstream.
commit c675949ec58ca50d5a3ae3c757892f1560f6e896
Author: Jani Nikula <jani.nikula@xxxxxxxxx>
Date: Wed Apr 9 11:31:37 2014 +0300
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@xxxxxxxxxxxxx>
Tested-by: Tyler Cleveland <siralucardt@xxxxxxxxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Jani Nikula <jani.nikula@xxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/i915/intel_display.c | 3 +++
1 file changed, 3 insertions(+)
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11690,6 +11690,9 @@ 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 },
Patches currently in stable-queue which might be from lkml14@xxxxxxxxxxxxx are
queue-3.16/drm-i915-ignore-vbt-backlight-presence-check-on-acer-c720-4005u.patch
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