[PATCH] rendercopy/gen8: Also emit 3DSTATE_WM_DEPTH_STENCIL.

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rendercopy was failing to emit 3DSTATE_WM_DEPTH_STENCIL, which is a new
packet on Broadwell.  Mesa emits this packet.

This appears to fix various tests on a fresh boot, when Mesa has never
run.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78890
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78891
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78935
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78936
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78937
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=78938
Signed-off-by: Kenneth Graunke <kenneth@xxxxxxxxxxxxx>
Cc: Ben Widawsky <ben@xxxxxxxxxxxx>
---
 lib/gen8_render.h     | 1 +
 lib/rendercopy_gen8.c | 4 ++++
 2 files changed, 5 insertions(+)

diff --git a/lib/gen8_render.h b/lib/gen8_render.h
index fffc100..0eec80c 100644
--- a/lib/gen8_render.h
+++ b/lib/gen8_render.h
@@ -48,6 +48,7 @@
 						GEN6_3D(3, 0, 0x21)
 #define GEN8_3DSTATE_PS_BLEND			GEN6_3D(3, 0, 0x4d)
 # define GEN8_PS_BLEND_HAS_WRITEABLE_RT			(1 << 30)
+#define GEN8_3DSTATE_WM_DEPTH_STENCIL		GEN6_3D(3, 0, 0x4e)
 #define GEN8_3DSTATE_PS_EXTRA			GEN6_3D(3,0, 0x4f)
 # define GEN8_PSX_PIXEL_SHADER_VALID			(1 << 31)
 # define GEN8_PSX_ATTRIBUTE_ENABLE			(1 << 8)
diff --git a/lib/rendercopy_gen8.c b/lib/rendercopy_gen8.c
index 6f5a698..e7567d2 100644
--- a/lib/rendercopy_gen8.c
+++ b/lib/rendercopy_gen8.c
@@ -816,6 +816,10 @@ gen8_emit_ps(struct intel_batchbuffer *batch, uint32_t kernel) {
 
 static void
 gen8_emit_depth(struct intel_batchbuffer *batch) {
+	OUT_BATCH(GEN8_3DSTATE_WM_DEPTH_STENCIL | (3 - 2));
+	OUT_BATCH(0);
+	OUT_BATCH(0);
+
 	OUT_BATCH(GEN7_3DSTATE_DEPTH_BUFFER | (8-2));
 	OUT_BATCH(0);
 	OUT_BATCH(0);
-- 
1.9.1

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