[Intel-gfx] [PATCH 17/22] drm/i915/icl: Wa_1406680159 and Wa_2201832410

[Oscar Mateo]

Disable GWL clock gating to prevent two different issues that
might cause hangs.

Please notice that one of the issues is pre-production only.

Cc: Mika Kuoppala <mika.kuoppala at linux.intel.com>
Signed-off-by: Oscar Mateo <oscar.mateo at intel.com>
---
 drivers/gpu/drm/i915/intel_pm.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index 68f1b60..2b7b88b 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -8564,6 +8564,12 @@ static void icl_init_clock_gating(struct drm_i915_private *dev_priv)
 		I915_WRITE(SLICE_UNIT_LEVEL_CLKGATE,
 			   (I915_READ(SLICE_UNIT_LEVEL_CLKGATE) |
 			    MSCUNIT_CLKGATE_DIS));
+
+	/* Wa_1406680159:icl */
+	/* Wa_2201832410:icl (pre-prod, only until C0) */
+	I915_WRITE(SUBSLICE_UNIT_LEVEL_CLKGATE,
+		   (I915_READ(SUBSLICE_UNIT_LEVEL_CLKGATE) |
+		    GWUNIT_CLKGATE_DIS));
 }
 
 static void cnl_init_clock_gating(struct drm_i915_private *dev_priv)
-- 
1.9.1