[PATCH v2] drm/rockchip: support non-iommu buffer path

Some rockchip vop not support iommu, need use non-iommu buffer for it. And if we get iommu issues, we can compare the issues with non-iommu path, the would help the debug. Signed-off-by: Mark Yao --- Changes in v2 Advised by Heiko Stuebner - use more suitable message

[PATCH v2] drm/rockchip: support non-iommu buffer path

Some rockchip vop not support iommu, need use non-iommu buffer for it. And if we get iommu issues, we can compare the issues with non-iommu path, the would help the debug. Signed-off-by: Mark Yao --- Changes in v2 Advised by Heiko Stuebner - use more suitable message print.