[Intel-gfx] [PATCH] drm/i915: Switch off FBC when disabling the primary plane when obscured

[Chris Wilson]

On Tue, 12 Jun 2012 07:28:04 -0700, Jesse Barnes <jbarnes at virtuousgeek.org> wrote:
> Though now we have 3 "active" state variables for the crtc don't we?
> active, enabled, and now primary_disabled?  Oh and dpms state.  I
> really wish we could get rid of 2 or 3 of those...</dreaming>

That crossed my mind as well. This felt like it was an orthogonal
property of the crtc, though in reality if we disable the crtc we will
disable the sprites as well so there is a dependence. Given how quickly
the dream of reducing the number of active/enabled/disabled/dpms_mode
states turns into a nightmare, I felt a certain reticient to attempting
it. Perhaps our in-house dragon tamer may like to give it a shot?
-Chris

-- 
Chris Wilson, Intel Open Source Technology Centre