OWL_DMA_IRQ_EN0
dma_writel(od, OWL_DMA_IRQ_EN0, 0x0);
dma_update(od, OWL_DMA_IRQ_EN0, (1 << pchan->id), false);
dma_update(od, OWL_DMA_IRQ_EN0, (1 << pchan->id), true);