[Mesa-dev] [PATCH] anv: Make sure state on primary is correct after CmdExecuteCommands

[Jason Ekstrand]

From: Alex Smith <asmith at feralinteractive.com>

After executing a secondary command buffer, we need to update certain
state on the primary command buffer to reflect changes by the secondary.
Otherwise subsequent commands may not have the correct state set.

This fixes various issues (rendering errors, GPU hangs) seen after
executing secondary command buffers in some cases.

v2 (Jason Ekstrand):
 - Reset to invalid values instead of pulling from the secondary
 - Change the comment to be more descriptive

Signed-off-by: Alex Smith <asmith at feralinteractive.com>
Reviewed-by: Jason Ekstrand <jason at jlekstrand.net>
Cc: mesa-stable at lists.freedesktop.org
---
 src/intel/vulkan/genX_cmd_buffer.c | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/intel/vulkan/genX_cmd_buffer.c b/src/intel/vulkan/genX_cmd_buffer.c
index b7253d5..4b73ac8 100644
--- a/src/intel/vulkan/genX_cmd_buffer.c
+++ b/src/intel/vulkan/genX_cmd_buffer.c
@@ -1078,6 +1078,15 @@ genX(CmdExecuteCommands)(
       anv_cmd_buffer_add_secondary(primary, secondary);
    }
 
+   /* The secondary may have selected a different pipeline (3D or compute) and
+    * may have changed the current L3$ configuration.  Reset our tracking
+    * variables to invalid values to ensure that we re-emit these in the case
+    * where we do any draws or compute dispatches from the primary after the
+    * secondary has returned.
+    */
+   primary->state.current_pipeline = UINT32_MAX;
+   primary->state.current_l3_config = NULL;
+
    /* Each of the secondary command buffers will use its own state base
     * address.  We need to re-emit state base address for the primary after
     * all of the secondaries are done.
-- 
2.5.0.400.gff86faf