drm/i915/icp: Add Wa_14010685332

We need to toggle a SDE chicken bit on and then off as the final step when disabling interrupts in preparation for runtime suspend. Bspec: 33450 Bspec: 8402 Cc: Bob Paauwe <bob.j.paauwe@intel.com> Signed-off-by: Matt Roper <matthew.d.roper@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200501213701.371443-1-matthew.d.roper@intel.com Reviewed-by: Bob Paauwe <bob.j.paauwe@intel.com>
mariux64 · May 5, 2020 · 9b2383a · 9b2383a
1 parent 977253d
commit 9b2383a
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diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
@@ -2870,6 +2870,14 @@ 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);
+
+	/* Wa_14010685332:icl */
+	if (INTEL_PCH_TYPE(dev_priv) == PCH_ICP) {
+		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 gen11_irq_reset(struct drm_i915_private *dev_priv)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
@@ -8573,6 +8573,7 @@ enum {
 #define  FDI_BC_BIFURCATION_SELECT	(1 << 12)
 #define  CHASSIS_CLK_REQ_DURATION_MASK	(0xf << 8)
 #define  CHASSIS_CLK_REQ_DURATION(x)	((x) << 8)
+#define  SBCLK_RUN_REFCLK_DIS		(1 << 7)
 #define  SPT_PWM_GRANULARITY		(1 << 0)
 #define SOUTH_CHICKEN2		_MMIO(0xc2004)
 #define  FDI_MPHY_IOSFSB_RESET_STATUS	(1 << 13)