[PATCH 3.15 37/42] drm/i915: Ignore VBT backlight presence check on HP Chromebook 14
From: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Date: 2014-08-05 18:14:18
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3.15-stable review patch. If anyone has any objections, please let me know.
------------------
From: Scot Doyle <redacted>
commit 724cb06fa9b1e1ffd98188275543fdb3b8eaca4f upstream.
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 <redacted>
Tested-by: Stefan Nagy <redacted>
Cc: Jani Nikula <redacted>
Cc: Daniel Vetter <redacted>
Signed-off-by: Daniel Vetter <redacted>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
---
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@@ -11251,6 +11251,9 @@ 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)