From: Imre Deak <imre.deak@intel.com>
Date: Mon, 1 Jun 2015 07:32:01 +0000 (+0300)
Subject: drm/i915/vlv: fix RC6 residency time calculation
X-Git-Tag: omap-for-v4.3/fixes-rc1~89^2~36^2~297
X-Git-Url: http://git.openpandora.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=66c826a1754c07012e29fbe9be7013e92a5acbac;p=pandora-kernel.git

drm/i915/vlv: fix RC6 residency time calculation

The divider value to convert from CZ clock rate to ms needs a +1
adjustment on VLV just like on CHV. This matches both the spec and
the accuracy test by pm_rc6_residency.

v2:
- simplify logic checking for the CHV 320MHz special case (Rodrigo)

Testcase: igt/pm_rc6_residency
Signed-off-by: Imre Deak <imre.deak@intel.com>
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=76877
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
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