[Mesa-stable] [PATCH] anv/blorp: Emit depth flush and stall prior to HiZ clears

[Jason Ekstrand]

We had the flush/stall after the clear but missed the one that needs to
go before the clear.

Cc: mesa-stable at lists.freedesktop.org
Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=107760
---
 src/intel/vulkan/anv_blorp.c | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/intel/vulkan/anv_blorp.c b/src/intel/vulkan/anv_blorp.c
index 3dfc8087630..532e8185c0e 100644
--- a/src/intel/vulkan/anv_blorp.c
+++ b/src/intel/vulkan/anv_blorp.c
@@ -1605,6 +1605,16 @@ anv_image_hiz_clear(struct anv_cmd_buffer *cmd_buffer,
                                    ISL_AUX_USAGE_NONE, &stencil);
    }
 
+   /* From the Sky Lake PRM Volume 7, "Depth Buffer Clear":
+    *
+    *    "If other rendering operations have preceded this clear, a
+    *    PIPE_CONTROL with depth cache flush enabled, Depth Stall bit enabled
+    *    must be issued before the rectangle primitive used for the depth
+    *    buffer clear operation."
+    */
+   cmd_buffer->state.pending_pipe_bits |=
+      ANV_PIPE_DEPTH_CACHE_FLUSH_BIT | ANV_PIPE_DEPTH_STALL_BIT;
+
    blorp_hiz_clear_depth_stencil(&batch, &depth, &stencil,
                                  level, base_layer, layer_count,
                                  area.offset.x, area.offset.y,
-- 
2.17.1