On Fri, May 21, 2021 at 3:02 PM Irui Wang <irui.wang@xxxxxxxxxxxx> wrote: > + if (of_get_property(pdev->dev.of_node, "dma-ranges", NULL)) > + dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(34)); > + >From your previous dt-bindings patch[1], it has 4 banks. > 0~4G; 4G~8G; 8G~12G; 12G~16G. But, the code treats it as a boolean. I.e. 0~4GB if non-existent; otherwise, 4GB~8GB. [1]: https://patchwork.linuxtv.org/project/linux-media/patch/20210521070139.20644-3-irui.wang@xxxxxxxxxxxx/
