From: Jani Nikula <jani.nikula@intel.com>
Date: Wed, 12 Nov 2014 14:25:42 +0000 (+0200)
Subject: drm/i915: don't save/restore panel fitter registers
X-Git-Tag: omap-for-v3.19/fixes-rc1~80^2~14^2~86
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=f7faa1ef175d34d600df6eb21d16b596088a608e;p=pandora-kernel.git

drm/i915: don't save/restore panel fitter registers

AFAICT i9xx_pfit_disable() on the GMCH display crtc disable path in
i9xx_crtc_disable() will always disable the panel fitter by writing 0 to
PFIT_CONTROL. The register save will always save/restore 0. Also we
completely recompue both in intel_gmch_panel_fitting so there's no way
we depend upon leftover bits.

Move the PFIT_CONTROL and PFIT_PGM_RATIOS save/restore to UMS
code. While at it, save/restore them both under the same conditions.

Signed-off-by: Jani Nikula <jani.nikula@intel.com>
[danvet: Make it a bit clearer that we nowhere depend upon these
bits.]
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
---

Reading git-diff-tree failed