drm/i915: Add ACPI OpRegion support for Ironlake

Add the support of ACPI opregion on Ironlake so that the backlight
brightness can be adjusted by using ACPI interface
   >/sys/class/backlight/acpi_video0/brightness

Signed-off-by: Zhao Yakui <yakui.zhao@intel.com>
Tested-by: Zhao Yakui <yakui.zhao@intel.com>
[zhenyuw: cleanups, fix typo for checking GSE irq and convert to
current irq handling logic.]
Signed-off-by: Zhenyu Wang <zhenyuw@linux.intel.com>
Signed-off-by: Eric Anholt <eric@anholt.net>

1 files changed, 2 insertions, 5 deletions

diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index 794ded2394cc..093146bacf84 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -1492,9 +1492,7 @@ 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);
+        intel_opregion_init(dev, 0);
 
         setup_timer(&dev_priv->hangcheck_timer, i915_hangcheck_elapsed,
                     (unsigned long) dev);
@@ -1538,8 +1536,7 @@ 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);
+        intel_opregion_free(dev, 0);
 
         if (drm_core_check_feature(dev, DRIVER_MODESET)) {
                 intel_modeset_cleanup(dev);