drm/i915/vlv: fix RC6 residency time calculation

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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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Imre Deak 2015-06-01 10:32:01 +03:00 • committed by Daniel Vetter

parent 3320e37f7a

commit 66c826a175

1 changed files with 7 additions and 15 deletions

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drivers/gpu/drm/i915/i915_sysfs.c

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