dmaengine: sprd: add dma mask interface in probe

In the probe of DMA, the default addressing range is 32 bits,
while the actual DMA hardware addressing range used is 36 bits.
So add dma_set_mask_and_coherent function to match DMA
addressing range.

Signed-off-by: Kaiwei Liu <kaiwei.liu@unisoc.com>
Reviewed-by: Baolin Wang <baolin.wang@linux.alibaba.com>
Link: https://lore.kernel.org/r/20230919073801.25054-1-kaiwei.liu@unisoc.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>

diff --git a/drivers/dma/sprd-dma.c b/drivers/dma/sprd-dma.c
index 0064a5f..fe3d69c 100644 (file)
--- a/drivers/dma/sprd-dma.c
+++ b/drivers/dma/sprd-dma.c
@@ -1117,6 +1117,15 @@ static int sprd_dma_probe(struct platform_device *pdev)
        u32 chn_count;
        int ret, i;
 
+       ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(36));
+       if (ret) {
+               ret = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
+               if (ret) {
+                       dev_err(&pdev->dev, "unable to set coherent mask to 32\n");
+                       return ret;
+               }
+       }
+
        /* Parse new and deprecated dma-channels properties */
        ret = device_property_read_u32(&pdev->dev, "dma-channels", &chn_count);
        if (ret)