drm/i915: do not setup backlight if not available according to VBT

[pandora-kernel.git] / drivers / gpu / drm / i915 / intel_panel.c

diff --git a/drivers/gpu/drm/i915/intel_panel.c b/drivers/gpu/drm/i915/intel_panel.c
index cb05840..0eead16 100644 (file)
--- a/drivers/gpu/drm/i915/intel_panel.c
+++ b/drivers/gpu/drm/i915/intel_panel.c
@@ -1065,6 +1065,11 @@ int intel_panel_setup_backlight(struct drm_connector *connector)
        unsigned long flags;
        int ret;
 
+       if (!dev_priv->vbt.backlight.present) {
+               DRM_DEBUG_KMS("native backlight control not available per VBT\n");
+               return 0;
+       }
+
        /* set level and max in panel struct */
        spin_lock_irqsave(&dev_priv->backlight_lock, flags);
        ret = dev_priv->display.setup_backlight(intel_connector);