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The HW iommu is able to support a 34-bit iova address-space (16GB), enable this feature for the encoder/decoder driver by shifting the address by two bits and setting the extended address registers. Signed-off-by: Jianhua Lin <jianhua.lin@mediatek.com> Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com> Signed-off-by: Hans Verkuil <hverkuil@xs4all.nl>