[RFC PATCH 05/11] media: iris: Skip DMA mask setting to core device when IOMMU is not mapped

[Vikash Garodia]

The non-pixel and pixel subnodes move the IOMMU streams away from the
iris parent device. As a result, the core device may not have an IOMMU
mapping, and setting its DMA mask is unnecessary.
Legacy platforms that have not migrated to subnodes still associate the
streams with the parent device and still need the DMA mask setup. Call
dma_set_mask_and_coherent() only when an IOMMU is mapped to the iris
core device.

Co-developed-by: Vishnu Reddy <busanna.reddy@xxxxxxxxxxxxxxxx>
Signed-off-by: Vishnu Reddy <busanna.reddy@xxxxxxxxxxxxxxxx>
Signed-off-by: Vikash Garodia <vikash.garodia@xxxxxxxxxxxxxxxx>
---
 drivers/media/platform/qcom/iris/iris_probe.c | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/media/platform/qcom/iris/iris_probe.c b/drivers/media/platform/qcom/iris/iris_probe.c
index 0bce4fb1786bc9371074cb72e082219ded4840e5..828e020fc79a7f9c4e8e11c118996f61bcb7715d 100644
--- a/drivers/media/platform/qcom/iris/iris_probe.c
+++ b/drivers/media/platform/qcom/iris/iris_probe.c
@@ -309,9 +309,11 @@ static int iris_probe(struct platform_device *pdev)
 
 	dma_mask = core->iris_platform_data->dma_mask;
 
-	ret = dma_set_mask_and_coherent(dev, dma_mask);
-	if (ret)
-		goto err_vdev_unreg_enc;
+	if (device_iommu_mapped(dev)) {
+		ret = dma_set_mask_and_coherent(dev, dma_mask);
+		if (ret)
+			goto err_vdev_unreg_enc;
+	}
 
 	dma_set_max_seg_size(&pdev->dev, DMA_BIT_MASK(32));
 	dma_set_seg_boundary(&pdev->dev, DMA_BIT_MASK(32));

-- 
2.34.1