DMA_TDFDQ
cdd->dma_tdfdq = cppi_readl(cdd->ctrl_mem + DMA_TDFDQ);
cppi_writel(cdd->dma_tdfdq, cdd->ctrl_mem + DMA_TDFDQ);
cppi_writel(cdd->td_queue.submit, cdd->ctrl_mem + DMA_TDFDQ);