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charset="utf-8" Remove the fallback compatible string "nvidia,tegra186-gpcdma" and enable GPCDMA in Tegra264. Tegra186 compatible cannot work on Tegra264 because of the register offset changes and absence of the reset property. Also add the iommu-map property so that each channel uses a separate stream ID and gets its own IOMMU domain for memory. Signed-off-by: Akhil R --- arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi | 4 ++++ arch/arm64/boot/dts/nvidia/tegra264.dtsi | 3 ++- 2 files changed, 6 insertions(+), 1 deletion(-) diff --git a/arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi b/arch/arm64/bo= ot/dts/nvidia/tegra264-p3834.dtsi index 7e2c3e66c2ab..c8beb616964a 100644 --- a/arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi @@ -16,6 +16,10 @@ serial@c4e0000 { serial@c5a0000 { status =3D "okay"; }; + + dma-controller@8400000 { + status =3D "okay"; + }; }; =20 bus@8100000000 { diff --git a/arch/arm64/boot/dts/nvidia/tegra264.dtsi b/arch/arm64/boot/dts= /nvidia/tegra264.dtsi index 24cc2c51a272..b2f20d4b567a 100644 --- a/arch/arm64/boot/dts/nvidia/tegra264.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra264.dtsi @@ -3208,7 +3208,7 @@ agic_page5: interrupt-controller@99b0000 { }; =20 gpcdma: dma-controller@8400000 { - compatible =3D "nvidia,tegra264-gpcdma", "nvidia,tegra186-gpcdma"; + compatible =3D "nvidia,tegra264-gpcdma"; reg =3D <0x0 0x08400000 0x0 0x210000>; interrupts =3D , , @@ -3244,6 +3244,7 @@ gpcdma: dma-controller@8400000 { ; #dma-cells =3D <1>; iommus =3D <&smmu1 0x00000800>; + iommu-map =3D <1 &smmu1 0x801 31>; dma-coherent; dma-channel-mask =3D <0xfffffffe>; status =3D "disabled"; --=20 2.50.1