drm/i915/chv: Use RMW to toggle swing calc init
authorVille Syrjälä <ville.syrjala@linux.intel.com>
Wed, 9 Apr 2014 10:29:04 +0000 (13:29 +0300)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Tue, 20 May 2014 13:53:09 +0000 (15:53 +0200)
commit1966e59ec1075597eff4d7feb3d11536a242d0eb
treebe56b0847b7ffd460f2423de97137b1a9786a37d
parentf72df8dbe2211cf2b70e54f8e9408b889fa56974
drm/i915/chv: Use RMW to toggle swing calc init

The spec only tells us to set individual bits here and there. So we use
RMW for most things. Do the same for the swing calc init.

Eventually we should optimize things to just blast the final value in
with group access whenever possible. But to do that someone needs to
take a good look at what's the reset value for each registers, and
possibly if the BIOS manages to frob with some of them. For now
use RMW access always.

Signed-off-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Reviewed-by: Mika Kuoppala <mika.kuoppala@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/i915_reg.h
drivers/gpu/drm/i915/intel_dp.c
drivers/gpu/drm/i915/intel_hdmi.c