From 143cd684c8d945dc5568a9dd9e32c28d73aaa5ea Mon Sep 17 00:00:00 2001 From: Kamal Mostafa Date: Fri, 7 May 2010 11:54:57 -0700 Subject: [PATCH 2/2] i915: Enable opregion-based backlight control === PRELIMINARY VERSION - NEEDS WORK === Override ACPI's backlight control mechanism with i915 opregion method. --- drivers/gpu/drm/i915/i915_opregion.c | 12 +++++++++++- 1 files changed, 11 insertions(+), 1 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_opregion.c b/drivers/gpu/drm/i915/i915_opregion.c index 7cc8410..f4e9f1a 100644 --- a/drivers/gpu/drm/i915/i915_opregion.c +++ b/drivers/gpu/drm/i915/i915_opregion.c @@ -471,8 +471,18 @@ int intel_opregion_init(struct drm_device *dev, int resume) opregion_enable_asle(dev); } - if (!resume) + if (!resume) { + /* Register our our opregion-based backlight brightness + * control method with ACPI. */ + u32 (*set_backlight_routine)(void *dev, u32 bclp); + if (IS_IRONLAKE(dev)) + set_backlight_routine = asle_set_backlight_ironlake; + else + set_backlight_routine = asle_set_backlight; + acpi_set_backlight_register(set_backlight_routine, dev, 255); + /* Register this video device with ACPI */ acpi_video_register(); + } /* Notify BIOS we are ready to handle ACPI video ext notifs. -- 1.7.0.4