pub unsafe fn submit_async_raw(_dma: &mut GpuDma, head: *const u32)Expand description
Kick the chain at head and return while the GPU walks it.
A walk already running on the channel is waited out first (or aborted
if it wedged), so the CPU can build the next frame while this one is
drawn. Pair it with wait.
§Safety
head must point at a 4-byte-aligned node tag in main RAM. Every node
reachable from it must have at most MAX_NODE_WORDS payload words and
lie in main RAM, and must stay live and unmodified until wait
returns (or a later kick, which waits for this walk first).