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 <[email protected]> Reviewed-by: Baolin Wang <[email protected]> Link: https://lore.kernel.org/r/[email protected] Signed-off-by: Vinod Koul <[email protected]>
gwr · Oct 2, 2023 · 9c6e02e · 9c6e02e
1 parent a04bbea
commit 9c6e02e
Showing 1 changed file with 9 additions and 0 deletions.
diff --git 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)