tmp &= ~BACKLIGHT_DUTY_CYCLE_MASK;
I915_WRITE(BLC_PWM_CTL, tmp | level);
}
+
+void intel_panel_disable_backlight(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ if (dev_priv->backlight_enabled) {
+ dev_priv->backlight_level = intel_panel_get_backlight(dev);
+ dev_priv->backlight_enabled = false;
+ }
+
+ intel_panel_set_backlight(dev, 0);
+}
+
+void intel_panel_enable_backlight(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ if (dev_priv->backlight_level == 0)
+ dev_priv->backlight_level = intel_panel_get_max_backlight(dev);
+
+ intel_panel_set_backlight(dev, dev_priv->backlight_level);
+ dev_priv->backlight_enabled = true;
+}
+
+void intel_panel_setup_backlight(struct drm_device *dev)
+{
+ struct drm_i915_private *dev_priv = dev->dev_private;
+
+ dev_priv->backlight_level = intel_panel_get_backlight(dev);
+ dev_priv->backlight_enabled = dev_priv->backlight_level != 0;
+}