[Intel-gfx] [PATCH v2 3/3] drm/i915: Toshiba CB35 has a controllable backlight

[Scot Doyle]

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 at scotdoyle.com>
CC: Jani Nikula <jani.nikula at intel.com>
---
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c
index 18089bf..b3a99e9 100644
--- a/drivers/gpu/drm/i915/intel_display.c
+++ b/drivers/gpu/drm/i915/intel_display.c
@@ -12394,6 +12394,9 @@ static struct intel_quirk intel_quirks[] = {

          /* Acer C720 and C720P Chromebooks (Celeron 2955U) have backlights */
          { 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)