DMA_DISR
imx_dmav1_writel(imxdma, (1 << IMX_DMA_CHANNELS) - 1, DMA_DISR);
imx_dmav1_writel(imxdma, 1 << channel, DMA_DISR);
imx_dmav1_writel(imxdma, 1 << channel, DMA_DISR);
disr = imx_dmav1_readl(imxdma, DMA_DISR);
imx_dmav1_writel(imxdma, disr & err_mask, DMA_DISR);
disr = imx_dmav1_readl(imxdma, DMA_DISR);
imx_dmav1_writel(imxdma, disr, DMA_DISR);