Implement direct pineview backlight control.

drivers/gpu/drm/i915/i915_dma.c

Index: drivers/gpu/drm/i915/i915_dma.c
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index b24e814d40955d4d44014de049f6d6c61684abd1..fe4d41c45215cddf8bb97dca22bea01f98501cb9 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1504,6 +1504,9 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
 
 	setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
 		    (unsigned long) dev);
+
+	i915_backlight_init(dev);
+
 	return 0;
 
 out_workqueue_free:
@@ -1523,6 +1526,8 @@ int i915_driver_unload(struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
 
+	i915_backlight_exit(dev);
+
 	destroy_workqueue(dev_priv->wq);
 	del_timer_sync(&dev_priv->hangcheck_timer);