Please apply following changes to disable SMMU for PCIe
--- a/arch/arm64/boot/dts/tegra210-soc-base.dtsi
+++ b/arch/arm64/boot/dts/tegra210-soc-base.dtsi
@@ -1252,6 +1252,7 @@
0x82000000 0 0x13000000 0x0 0x13000000 0 0x0d000000 /* non-prefetchable memory (208 MiB) */
0xc2000000 0 0x20000000 0x0 0x20000000 0 0x20000000>; /* prefetchable memory (512 MiB) */
+ iommus = <&smmu TEGRA_SWGROUP_AFI>;
status = "disabled";
pci@1,0 {
and
--- a/drivers/iommu/of_tegra-smmu.c
+++ b/drivers/iommu/of_tegra-smmu.c
@@ -166,7 +166,6 @@ u64 tegra_smmu_of_get_swgids(struct device *dev,
u64 fixup, swgids = 0;
if (dev_is_pci(dev)) {
- return SWGIDS_ERROR_CODE;
swgids = TEGRA_SWGROUP_BIT(AFI);
goto try_fixup;
}