AXG_FIFO_BURST
end_ptr = runtime->dma_addr + runtime->dma_bytes - AXG_FIFO_BURST;
burst_num = period / AXG_FIFO_BURST;
threshold /= AXG_FIFO_BURST;
AXG_FIFO_BURST);
AXG_FIFO_BURST);
.period_bytes_min = AXG_FIFO_BURST,
val = (depth / AXG_FIFO_BURST) - 1;