[Intel-gfx] [PATCH v2 1/3] backlight: introduce backlight_device_registered

[Yves-Alexis Perez]

On mar., 2013-09-17 at 17:23 +0800, Aaron Lu wrote:
> Introduce a new API for modules to query if a specific type of
> backlight
> device has been registered. This is useful for some backlight device
> provider module(e.g. ACPI video) to know if a native control
> interface(e.g. the interface created by i915) is available and then do
> things accordingly(e.g. avoid register its own on Win8 systems).
> 
> Signed-off-by: Aaron Lu <aaron.lu at intel.com>
Tested-by: Yves-Alexis Perez <corsac at debian.org>
-- 
Yves-Alexis
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