t> 1257461353 -0800 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 Tested-by: Zhao Yakui [zhenyuw: cleanups, fix typo for checking GSE irq and convert to current irq handling logic.] Signed-off-by: Zhenyu Wang Signed-off-by: Eric Anholt ä?