drm/i915/chv: calculate rc6 residency correctly
authorMika Kuoppala <mika.kuoppala@linux.intel.com>
Wed, 9 Jul 2014 11:55:56 +0000 (14:55 +0300)
committerDaniel Vetter <daniel.vetter@ffwll.ch>
Sat, 12 Jul 2014 09:13:47 +0000 (11:13 +0200)
commit542a6b205b184ec90e2108aaebaf8ba16128baec
treeaf5ef3cb1b973090ef2797c9fb4573107bba227f
parentd4ef41ce151988411dec8b089636d9ecbd1da559
drm/i915/chv: calculate rc6 residency correctly

The register to read cz count is different from vlv. Also
the counts returned from CCK_CTL1 for BSW are (ticks in 30ns - 1).
czcount_30ns of value 1 is a special case for 320Mhz.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=80703
Suggested-by: Deepak S <deepak.s@linux.intel.com>
Cc: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Tested-by: Guo Jinxian <jinxianx.guo@intel.com>
Reviewed-by: Deepak S <deepak.s@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
drivers/gpu/drm/i915/i915_reg.h
drivers/gpu/drm/i915/i915_sysfs.c