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drm/i915: Toshiba CB35 has a controllable backlight

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The Toshiba CB35 Chromebook (with Celeron 2955U CPU) has a controllable
backlight although its VBT reports otherwise. Apply quirk to ignore the
backlight presence check during backlight setup.

Patch tested by author on Toshiba CB35.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=79813
Signed-off-by: Scot Doyle <lkml14@scotdoyle.com>
CC: Jani Nikula <jani.nikula@intel.com>
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Cc: stable@vger.kernel.org # 3.15 only
[danvet: Add cc: stable because the regressing commit is in 3.15.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Scot Doyle 2014-07-03 23:27:52 +00:00 committed by Daniel Vetter
parent 2e93a1aa9c
commit d4967d8c6d
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/i915/intel_display.c
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@ -11670,6 +11670,9 @@ static struct intel_quirk intel_quirks[] = {
/* Acer C720 and C720P Chromebooks (Celeron 2955U) have backlights */ /* Acer C720 and C720P Chromebooks (Celeron 2955U) have backlights */
{ 0x0a06, 0x1025, 0x0a11, quirk_backlight_present }, { 0x0a06, 0x1025, 0x0a11, quirk_backlight_present },
/* Toshiba CB35 Chromebook (Celeron 2955U) */
{ 0x0a06, 0x1179, 0x0a88, quirk_backlight_present },
}; };
static void intel_init_quirks(struct drm_device *dev) static void intel_init_quirks(struct drm_device *dev)