[Intel-gfx] [PATCH 1/4] drm/i915: save/restore the legacy backlight control

[Chris Wilson]

On Tue, 28 Aug 2012 09:53:36 +0300, Jani Nikula <jani.nikula at intel.com> wrote:
> From: Daniel Vetter <daniel.vetter at ffwll.ch>
> 
> This is a prep patch to stop drm/i915 from changing the LBPC registers
> itself - but we still need to properly save/restore it on
> suspend/resume.

My presumption was that there were BIOSes out there that only adjusted
the LBPC values, and so any device setting that flag would likely only
with it through the BIOS hotkeys. I couldn't see any other rational
reason for the hardware maintaining multiple interfaces...
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre