[Mesa-dev] [PATCH 7/7] i965: Also emit HiZ and Stencil packets when disabling depth on Gen6.

[Kenneth Graunke]

The normal drawing path does this, and it's necessary on Ivybridge,
so let's try it on Sandybridge too.  It's not explicitly documented
as necessary, but might help with hangs.

Signed-off-by: Kenneth Graunke <kenneth at whitecape.org>
---
 src/mesa/drivers/dri/i965/gen6_blorp.cpp | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/src/mesa/drivers/dri/i965/gen6_blorp.cpp b/src/mesa/drivers/dri/i965/gen6_blorp.cpp
index ce215c2..8735270 100644
--- a/src/mesa/drivers/dri/i965/gen6_blorp.cpp
+++ b/src/mesa/drivers/dri/i965/gen6_blorp.cpp
@@ -930,6 +930,18 @@ gen6_blorp_emit_depth_disable(struct brw_context *brw,
    OUT_BATCH(0);
    OUT_BATCH(0);
    ADVANCE_BATCH();
+
+   BEGIN_BATCH(3);
+   OUT_BATCH(_3DSTATE_HIER_DEPTH_BUFFER << 16 | (3 - 2));
+   OUT_BATCH(0);
+   OUT_BATCH(0);
+   ADVANCE_BATCH();
+
+   BEGIN_BATCH(3);
+   OUT_BATCH(_3DSTATE_STENCIL_BUFFER << 16 | (3 - 2));
+   OUT_BATCH(0);
+   OUT_BATCH(0);
+   ADVANCE_BATCH();
 }
 
 
-- 
1.8.3.2