From d46b00dc38c8aea80357a0dd04f57c097dbfa5b9 Mon Sep 17 00:00:00 2001
From: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Date: Tue, 10 Oct 2017 22:30:03 +0100
Subject: [PATCH] drm/i915: Separate RPS and RC6 handling for CHV
Git-commit: d46b00dc38c8aea80357a0dd04f57c097dbfa5b9
Patch-mainline: v4.15-rc1
References: FATE#322643 bsc#1055900

This patch separates enable/disable of RC6 and RPS for CHV.

V2: Fixed comment.

Signed-off-by: Sagar Arun Kamble <sagar.a.kamble@intel.com>
Cc: Imre Deak <imre.deak@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Reviewed-by: Radoslaw Szwichtenberg <radoslaw.szwichtenberg@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/1507360055-19948-6-git-send-email-sagar.a.kamble@intel.com
Acked-by: Imre Deak <imre.deak@intel.com>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: https://patchwork.freedesktop.org/patch/msgid/20171010213010.7415-5-chris@chris-wilson.co.uk
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 drivers/gpu/drm/i915/intel_pm.c |   30 ++++++++++++++++++++++++------
 1 file changed, 24 insertions(+), 6 deletions(-)

--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -6336,11 +6336,16 @@ static void gen6_disable_rps(struct drm_
 	I915_WRITE(GEN6_RP_CONTROL, 0);
 }
 
-static void cherryview_disable_rps(struct drm_i915_private *dev_priv)
+static void cherryview_disable_rc6(struct drm_i915_private *dev_priv)
 {
 	I915_WRITE(GEN6_RC_CONTROL, 0);
 }
 
+static void cherryview_disable_rps(struct drm_i915_private *dev_priv)
+{
+	I915_WRITE(GEN6_RP_CONTROL, 0);
+}
+
 static void valleyview_disable_rc6(struct drm_i915_private *dev_priv)
 {
 	/* We're doing forcewake before Disabling RC6,
@@ -7190,11 +7195,11 @@ static void valleyview_cleanup_gt_powers
 	valleyview_cleanup_pctx(dev_priv);
 }
 
-static void cherryview_enable_rps(struct drm_i915_private *dev_priv)
+static void cherryview_enable_rc6(struct drm_i915_private *dev_priv)
 {
 	struct intel_engine_cs *engine;
 	enum intel_engine_id id;
-	u32 gtfifodbg, val, rc6_mode = 0, pcbr;
+	u32 gtfifodbg, rc6_mode = 0, pcbr;
 
 	WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
 
@@ -7227,7 +7232,7 @@ static void cherryview_enable_rps(struct
 	/* TO threshold set to 500 us ( 0x186 * 1.28 us) */
 	I915_WRITE(GEN6_RC6_THRESHOLD, 0x186);
 
-	/* allows RC6 residency counter to work */
+	/* Allows RC6 residency counter to work */
 	I915_WRITE(VLV_COUNTER_CONTROL,
 		   _MASKED_BIT_ENABLE(VLV_COUNT_RANGE_HIGH |
 				      VLV_MEDIA_RC6_COUNT_EN |
@@ -7243,7 +7248,18 @@ static void cherryview_enable_rps(struct
 
 	I915_WRITE(GEN6_RC_CONTROL, rc6_mode);
 
-	/* 4 Program defaults and thresholds for RPS*/
+	intel_uncore_forcewake_put(dev_priv, FORCEWAKE_ALL);
+}
+
+static void cherryview_enable_rps(struct drm_i915_private *dev_priv)
+{
+	u32 val;
+
+	WARN_ON(!mutex_is_locked(&dev_priv->rps.hw_lock));
+
+	intel_uncore_forcewake_get(dev_priv, FORCEWAKE_ALL);
+
+	/* 1: Program defaults and thresholds for RPS*/
 	I915_WRITE(GEN6_RP_DOWN_TIMEOUT, 1000000);
 	I915_WRITE(GEN6_RP_UP_THRESHOLD, 59400);
 	I915_WRITE(GEN6_RP_DOWN_THRESHOLD, 245000);
@@ -7252,7 +7268,7 @@ static void cherryview_enable_rps(struct
 
 	I915_WRITE(GEN6_RP_IDLE_HYSTERSIS, 10);
 
-	/* 5: Enable RPS */
+	/* 2: Enable RPS */
 	I915_WRITE(GEN6_RP_CONTROL,
 		   GEN6_RP_MEDIA_HW_NORMAL_MODE |
 		   GEN6_RP_MEDIA_IS_GFX |
@@ -7949,6 +7965,7 @@ void intel_disable_gt_powersave(struct d
 		gen9_disable_rc6(dev_priv);
 		gen9_disable_rps(dev_priv);
 	} else if (IS_CHERRYVIEW(dev_priv)) {
+		cherryview_disable_rc6(dev_priv);
 		cherryview_disable_rps(dev_priv);
 	} else if (IS_VALLEYVIEW(dev_priv)) {
 		valleyview_disable_rc6(dev_priv);
@@ -7979,6 +7996,7 @@ void intel_enable_gt_powersave(struct dr
 	mutex_lock(&dev_priv->rps.hw_lock);
 
 	if (IS_CHERRYVIEW(dev_priv)) {
+		cherryview_enable_rc6(dev_priv);
 		cherryview_enable_rps(dev_priv);
 	} else if (IS_VALLEYVIEW(dev_priv)) {
 		valleyview_enable_rc6(dev_priv);