vc4: Add a debug flag for waiting for sync on submit.

This is nice when you're tracking down which command list is hanging the
GPU.

1 files changed, 2 insertions, 0 deletions

diff --git a/src/gallium/drivers/vc4/vc4_screen.c b/src/gallium/drivers/vc4/vc4_screen.c
index abd44eee3a8..18451bd71a7 100644
--- a/src/gallium/drivers/vc4/vc4_screen.c
+++ b/src/gallium/drivers/vc4/vc4_screen.c
@@ -52,6 +52,8 @@ static const struct debug_named_value debug_options[] = {
           "Skip actual hardware execution of commands" },
         { "always_flush", VC4_DEBUG_ALWAYS_FLUSH,
           "Flush after each draw call" },
+        { "always_sync", VC4_DEBUG_ALWAYS_SYNC,
+          "Wait for finish after each flush" },
         { NULL }
 };