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

Mika Kuoppala
2016-06-07T14:22:49Z

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

References: HSD#2134698
Signed-off-by: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@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;