drm/i915: Disable opregion on IGDNG for now

Disable OpRegion support for now until verified on new chipsets.
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

drivers/gpu/drm/i915/i915_dma.c

@@ -1206,6 +1206,8 @@ int i915_driver_load(struct drm_device *dev, unsigned long flags)
 	}
 
 	/* Must be done after probing outputs */
+	/* FIXME: verify on IGDNG */
+	if (!IS_IGDNG(dev))
 		intel_opregion_init(dev, 0);
 
 	return 0;
@@ -1240,6 +1242,7 @@ int i915_driver_unload(struct drm_device *dev)
 	if (dev_priv->regs != NULL)
 		iounmap(dev_priv->regs);
 
+	if (!IS_IGDNG(dev))
 		intel_opregion_free(dev, 0);
 
 	if (drm_core_check_feature(dev, DRIVER_MODESET)) {

drivers/gpu/drm/i915/i915_irq.c

@@ -484,6 +484,8 @@ void i915_disable_vblank(struct drm_device *dev, int pipe)
 void i915_enable_interrupt (struct drm_device *dev)
 {
 	struct drm_i915_private *dev_priv = dev->dev_private;
+
+	if (!IS_IGDNG(dev))
 		opregion_enable_asle(dev);
 	dev_priv->irq_enabled = 1;
 }