[Intel-gfx] [PATCH 1/3] drm/i915: Macros to convert PM time interval values to microseconds

[akash.goel at intel.com]

From: Akash Goel <akash.goel at intel.com>

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 at chris-wilson.co.uk>
Signed-off-by: Akash Goel <akash.goel at intel.com>
---
 drivers/gpu/drm/i915/i915_reg.h | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 9464ba3..eacd9ae 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -2939,6 +2939,15 @@ enum skl_disp_power_wells {
 				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
  */
-- 
1.9.2