[Intel-gfx] [PATCH] drm/i915/icp: Add Wa_14010685332

[Matt Roper]

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 at intel.com>
Signed-off-by: Matt Roper <matthew.d.roper at intel.com>
---
 drivers/gpu/drm/i915/i915_irq.c | 8 ++++++++
 drivers/gpu/drm/i915/i915_reg.h | 1 +
 2 files changed, 9 insertions(+)

diff --git a/drivers/gpu/drm/i915/i915_irq.c b/drivers/gpu/drm/i915/i915_irq.c
index bd722d0650c8..f8202a32c112 100644
--- 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
index fd9f2904d93c..34af899751e2 100644
--- 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)
-- 
2.24.1