[Intel-gfx] [PATCH 16/27] drm/i915/gen9: Add WaDisableSkipCaching

[Mika Kuoppala]

Make sure that we never enable skip caching on gen9 by
accident.

References: HSD#2134698
Signed-off-by: Mika Kuoppala <mika.kuoppala at intel.com>
Reviewed-by: Matthew Auld <matthew.auld at intel.com>
---
 drivers/gpu/drm/i915/intel_mocs.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_mocs.c b/drivers/gpu/drm/i915/intel_mocs.c
index b765c75f3fcd..8f96c40e415c 100644
--- a/drivers/gpu/drm/i915/intel_mocs.c
+++ b/drivers/gpu/drm/i915/intel_mocs.c
@@ -156,6 +156,16 @@ static bool get_mocs_settings(struct drm_i915_private *dev_priv,
 			  "Platform that should have a MOCS table does not.\n");
 	}
 
+	/* WaDisableSkipCaching:skl,bxt,kbl */
+	if (IS_GEN9(dev_priv)) {
+		int i;
+
+		for (i = 0; i < table->size; i++)
+			if (WARN_ON(table->table[i].l3cc_value &
+				    (L3_ESC(1) || L3_SCC(0x7))))
+				return false;
+	}
+
 	return result;
 }
 
-- 
2.7.4