[Intel-gfx] [PATCH] drm/i915/vlv: fix RC6 residency time calculation

[Imre Deak]

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.

Testcase: igt/pm_rc6_residency
Signed-off-by: Imre Deak <imre.deak at intel.com>
---
 drivers/gpu/drm/i915/i915_sysfs.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
index 2476268..aa99efc 100644
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -76,6 +76,8 @@ static u32 calc_residency(struct drm_device *dev, const u32 reg)
 				/* chv counts are one less */
 				czcount_30ns += 1;
 			}
+		} else {
+			czcount_30ns += 1;
 		}
 
 		if (units == 0)
-- 
2.1.4