linux-kernel - [PATCH 5.13 072/127] drm/i915: Tweaked Wa

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Date:   Tue, 24 Aug 2021 12:55:12 -0400
From:   Sasha Levin <sashal@...nel.org>
To:     linux-kernel@...r.kernel.org, stable@...r.kernel.org
Cc:     Anshuman Gupta <anshuman.gupta@...el.com>,
        Matt Roper <matthew.d.roper@...el.com>,
        Rodrigo Vivi <rodrigo.vivi@...el.com>,
        Imre Deak <imre.deak@...el.com>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.13 072/127] drm/i915: Tweaked Wa_14010685332 for all PCHs

From: Anshuman Gupta <anshuman.gupta@...el.com>

[ Upstream commit b8441b288d6031eac21390891ba36487b2cb398b ]

dispcnlunit1_cp_xosc_clkreq clock observed to be active on TGL-H platform
despite Wa_14010685332 original sequence,
thus blocks entry to deeper s0ix state.

The Tweaked Wa_14010685332 sequence fixes this issue, therefore use tweaked
Wa_14010685332 sequence for every PCH since PCH_CNP.

v2:
- removed RKL from comment and simplified condition. [Rodrigo]

Fixes: b896898c7369 ("drm/i915: Tweaked Wa_14010685332 for PCHs used on gen11 platforms")
Cc: Matt Roper <matthew.d.roper@...el.com>
Cc: Rodrigo Vivi <rodrigo.vivi@...el.com>
Cc: Imre Deak <imre.deak@...el.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta@...el.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi@...el.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20210810113112.31739-2-anshuman.gupta@intel.com
(cherry picked from commit 8b46cc6577f4bbef7e5909bb926da31d705f350f)
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@...el.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 .../drm/i915/display/intel_display_power.c    | 16 +++++++-------
 drivers/gpu/drm/i915/i915_irq.c               | 21 -------------------
 2 files changed, 8 insertions(+), 29 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 99126caf5747..a8597444d515 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -5910,13 +5910,13 @@ void intel_display_power_suspend_late(struct drm_i915_private *i915)
 {
 	if (DISPLAY_VER(i915) >= 11 || IS_GEN9_LP(i915)) {
 		bxt_enable_dc9(i915);
-		/* Tweaked Wa_14010685332:icp,jsp,mcc */
-		if (INTEL_PCH_TYPE(i915) >= PCH_ICP && INTEL_PCH_TYPE(i915) <= PCH_MCC)
-			intel_de_rmw(i915, SOUTH_CHICKEN1,
-				     SBCLK_RUN_REFCLK_DIS, SBCLK_RUN_REFCLK_DIS);
 	} else if (IS_HASWELL(i915) || IS_BROADWELL(i915)) {
 		hsw_enable_pc8(i915);
 	}
+
+	/* Tweaked Wa_14010685332:cnp,icp,jsp,mcc,tgp,adp */
+	if (INTEL_PCH_TYPE(i915) >= PCH_CNP && INTEL_PCH_TYPE(i915) < PCH_DG1)
+		intel_de_rmw(i915, SOUTH_CHICKEN1, SBCLK_RUN_REFCLK_DIS, SBCLK_RUN_REFCLK_DIS);
 }
 
 void intel_display_power_resume_early(struct drm_i915_private *i915)
@@ -5924,13 +5924,13 @@ void intel_display_power_resume_early(struct drm_i915_private *i915)
 	if (DISPLAY_VER(i915) >= 11 || IS_GEN9_LP(i915)) {
 		gen9_sanitize_dc_state(i915);
 		bxt_disable_dc9(i915);
-		/* Tweaked Wa_14010685332:icp,jsp,mcc */
-		if (INTEL_PCH_TYPE(i915) >= PCH_ICP && INTEL_PCH_TYPE(i915) <= PCH_MCC)
-			intel_de_rmw(i915, SOUTH_CHICKEN1, SBCLK_RUN_REFCLK_DIS, 0);
-
 	} else if (IS_HASWELL(i915) || IS_BROADWELL(i915)) {
 		hsw_disable_pc8(i915);
 	}
+
+	/* Tweaked Wa_14010685332:cnp,icp,jsp,mcc,tgp,adp */
+	if (INTEL_PCH_TYPE(i915) >= PCH_CNP && INTEL_PCH_TYPE(i915) < PCH_DG1)
+		intel_de_rmw(i915, SOUTH_CHICKEN1, SBCLK_RUN_REFCLK_DIS, 0);
 }
 
 void intel_display_power_suspend(struct drm_i915_private *i915)
diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index e0d0b300c4aa..783f25920d00 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -3042,24 +3042,6 @@ static void valleyview_irq_reset(struct drm_i915_private *dev_priv)
 	spin_unlock_irq(&dev_priv->irq_lock);
 }
 
-static void cnp_display_clock_wa(struct drm_i915_private *dev_priv)
-{
-	struct intel_uncore *uncore = &dev_priv->uncore;
-
-	/*
-	 * Wa_14010685332:cnp/cmp,tgp,adp
-	 * TODO: Clarify which platforms this applies to
-	 * TODO: Figure out if this workaround can be applied in the s0ix suspend/resume handlers as
-	 * on earlier platforms and whether the workaround is also needed for runtime suspend/resume
-	 */
-	if (INTEL_PCH_TYPE(dev_priv) == PCH_CNP ||
-	    (INTEL_PCH_TYPE(dev_priv) >= PCH_TGP && INTEL_PCH_TYPE(dev_priv) < PCH_DG1)) {
-		intel_uncore_rmw(uncore, SOUTH_CHICKEN1, SBCLK_RUN_REFCLK_DIS,
-				 SBCLK_RUN_REFCLK_DIS);
-		intel_uncore_rmw(uncore, SOUTH_CHICKEN1, SBCLK_RUN_REFCLK_DIS, 0);
-	}
-}
-
 static void gen8_display_irq_reset(struct drm_i915_private *dev_priv)
 {
 	struct intel_uncore *uncore = &dev_priv->uncore;
@@ -3093,7 +3075,6 @@ static void gen8_irq_reset(struct drm_i915_private *dev_priv)
 	if (HAS_PCH_SPLIT(dev_priv))
 		ibx_irq_reset(dev_priv);
 
-	cnp_display_clock_wa(dev_priv);
 }
 
 static void gen11_display_irq_reset(struct drm_i915_private *dev_priv)
@@ -3137,8 +3118,6 @@ static void gen11_display_irq_reset(struct drm_i915_private *dev_priv)
 
 	if (INTEL_PCH_TYPE(dev_priv) >= PCH_ICP)
 		GEN3_IRQ_RESET(uncore, SDE);
-
-	cnp_display_clock_wa(dev_priv);
 }
 
 static void gen11_irq_reset(struct drm_i915_private *dev_priv)
-- 
2.30.2