Add Intel ACPI IGD OpRegion support
This adds the support necessary for allowing ACPI backlight control to
work on some newer Intel-based graphics systems. Tested on Thinkpad T61
and HP 2510p hardware.
Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Dave Airlie <airlied@linux.ie>
diff --git a/drivers/gpu/drm/i915/i915_dma.c b/drivers/gpu/drm/i915/i915_dma.c
index f1b5aa9..2911545 100644
--- a/drivers/gpu/drm/i915/i915_dma.c
+++ b/drivers/gpu/drm/i915/i915_dma.c
@@ -810,6 +810,8 @@
if (!IS_I945G(dev) && !IS_I945GM(dev))
pci_enable_msi(dev->pdev);
+ intel_opregion_init(dev);
+
spin_lock_init(&dev_priv->user_irq_lock);
return ret;
@@ -827,6 +829,8 @@
if (dev_priv->mmio_map)
drm_rmmap(dev, dev_priv->mmio_map);
+ intel_opregion_free(dev);
+
drm_free(dev->dev_private, sizeof(drm_i915_private_t),
DRM_MEM_DRIVER);