| Index: drivers/gpu/drm/Kconfig | 
| diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig | 
| index 305c590039634603972d31ed02ab72b49e202938..14e21c37c01118907cfde0279dc0b3b296341c5a 100644 | 
| --- a/drivers/gpu/drm/Kconfig | 
| +++ b/drivers/gpu/drm/Kconfig | 
| @@ -124,6 +124,18 @@ config DRM_I915_KMS | 
| the driver to bind to PCI devices, which precludes loading things | 
| like intelfb. | 
|  | 
| +config DRM_I915_DIRECT_BACKLIGHT | 
| +	bool "Enable direct backlight control" | 
| +	depends on DRM_I915 | 
| +	help | 
| +	  Choose this option if you want the i915 driver to provide direct | 
| +	  backlight control via /sys/class/backlight/i915_backlight.  This | 
| +	  is in addition to the ACPI interface (which may also be in that | 
| +	  directory) that uses ASLE (ACPI Source Language Events) events to | 
| +	  get to i915_opregion.c code. | 
| +	  Direct backlight control gives finer granularity (0-256) than ACPI | 
| +	  and does not require BIOS support. | 
| + | 
| endchoice | 
|  | 
| config DRM_MGA | 
|  |