[PATCH 1/1][SRU][OEM-5.10] drm/i915: Tweaked Wa_14010685332 for all PCHs

[AceLan Kao]

From: Anshuman Gupta <anshuman.gupta at intel.com>

BugLink: https://bugs.launchpad.net/bugs/1928047

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 at intel.com>
Cc: Rodrigo Vivi <rodrigo.vivi at intel.com>
Cc: Imre Deak <imre.deak at intel.com>
Signed-off-by: Anshuman Gupta <anshuman.gupta at intel.com>
Reviewed-by: Rodrigo Vivi <rodrigo.vivi at intel.com>
(backported from
https://patchwork.kernel.org/project/intel-gfx/patch/20210325120947.11950-1-anshuman.gupta@intel.com/)
Signed-off-by: Chia-Lin Kao (AceLan) <acelan.kao at canonical.com>
---
 .../drm/i915/display/intel_display_power.c    |  8 +++++++
 drivers/gpu/drm/i915/i915_irq.c               | 21 -------------------
 2 files changed, 8 insertions(+), 21 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_display_power.c b/drivers/gpu/drm/i915/display/intel_display_power.c
index 7277e58b01f13..36fef3e2e86e1 100644
--- a/drivers/gpu/drm/i915/display/intel_display_power.c
+++ b/drivers/gpu/drm/i915/display/intel_display_power.c
@@ -5833,6 +5833,10 @@ void intel_display_power_suspend_late(struct drm_i915_private *i915)
 		bxt_enable_dc9(i915);
 	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)
@@ -5843,6 +5847,10 @@ void intel_display_power_resume_early(struct drm_i915_private *i915)
 	} 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 91637cfa3be1c..af7c1da4be7b5 100644
--- a/drivers/gpu/drm/i915/i915_irq.c
+++ b/drivers/gpu/drm/i915/i915_irq.c
@@ -2838,24 +2838,6 @@ 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_irq_reset(struct drm_i915_private *dev_priv)
 {
 	struct intel_uncore *uncore = &dev_priv->uncore;
@@ -2880,7 +2862,6 @@ 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)
@@ -2921,8 +2902,6 @@ 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)
-- 
2.25.1