drm/i915: Macros to convert PM time interval values to microseconds
Added a new GT_PM_INTERVAL_TO_US macro to perform the platform
specific conversion of PM time interval values to microseconds unit.
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Akash Goel <akash.goel@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1461350146-23454-1-git-send-email-akash.goel@intel.com
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 08f01f4..58ac6c7 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2964,6 +2964,15 @@
INTERVAL_1_33_US(us)) : \
INTERVAL_1_28_US(us))
+#define INTERVAL_1_28_TO_US(interval) (((interval) << 7) / 100)
+#define INTERVAL_1_33_TO_US(interval) (((interval) << 2) / 3)
+#define INTERVAL_0_833_TO_US(interval) (((interval) * 5) / 6)
+#define GT_PM_INTERVAL_TO_US(dev_priv, interval) (IS_GEN9(dev_priv) ? \
+ (IS_BROXTON(dev_priv) ? \
+ INTERVAL_0_833_TO_US(interval) : \
+ INTERVAL_1_33_TO_US(interval)) : \
+ INTERVAL_1_28_TO_US(interval))
+
/*
* Logical Context regs
*/