Please pull commit 724cb06fa9b1e1ffd98188275543fdb3b8eaca4f (3.16), which
fixes a regression introduced in c675949ec58ca50d5a3ae3c757892f1560f6e896
(3.15-rc2) but wasn't cc'd to stable.
---
From: Scot Doyle <lkml14@xxxxxxxxxxxxx>
Date: Fri, 11 Jul 2014 22:16:30 +0000
Subject: drm/i915: Ignore VBT backlight presence check on HP Chromebook 14
commit c675949ec58ca50d5a3ae3c757892f1560f6e896
drm/i915: do not setup backlight if not available according to VBT
caused a regression on the HP Chromebook 14 (with Celeron 2955U CPU),
which has a misconfigured VBT. Apply quirk to ignore the VBT backlight
presence check during backlight setup.
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79813
Signed-off-by: Scot Doyle <lkml14@xxxxxxxxxxxxx>
Tested-by: Stefan Nagy <public@xxxxxxxxxxxxxx>
Cc: Jani Nikula <jani.nikula@xxxxxxxxx>
Cc: Daniel Vetter <daniel.vetter@xxxxxxxx>
Signed-off-by: Daniel Vetter <daniel.vetter@xxxxxxxx>
diff --git a/drivers/gpu/drm/i915/intel_display.c
b/drivers/gpu/drm/i915/intel_display.c
index e27e780..82e7d57 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -11673,6 +11673,9 @@ static struct intel_quirk intel_quirks[] = {
/* Toshiba CB35 Chromebook (Celeron 2955U) */
{ 0x0a06, 0x1179, 0x0a88, quirk_backlight_present },
+
+ /* HP Chromebook 14 (Celeron 2955U) */
+ { 0x0a06, 0x103c, 0x21ed, quirk_backlight_present },
};
static void intel_init_quirks(struct drm_device *dev)
--
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