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Mon, 30 Mar 2026 07:46:38 -0700 From: Akhil R To: Vinod Koul , Frank Li , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Thierry Reding , "Jonathan Hunter" , Laxman Dewangan , Philipp Zabel , , , , CC: Akhil R Subject: [PATCH v5 10/10] arm64: tegra: Enable GPCDMA in Tegra264 and add iommu-map Date: Mon, 30 Mar 2026 20:14:56 +0530 Message-ID: <20260330144456.13551-11-akhilrajeev@nvidia.com> X-Mailer: git-send-email 2.50.1 In-Reply-To: <20260330144456.13551-1-akhilrajeev@nvidia.com> References: <20260330144456.13551-1-akhilrajeev@nvidia.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-NVConfidentiality: public Content-Transfer-Encoding: quoted-printable X-NV-OnPremToCloud: ExternallySecured X-EOPAttributedMessage: 0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SJ1PEPF0000231C:EE_|CY5PR12MB6131:EE_ X-MS-Office365-Filtering-Correlation-Id: da29a80c-1673-4eb6-b477-08de8e6b36c5 X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|36860700016|1800799024|82310400026|376014|7416014|18002099003|56012099003|22082099003|921020; 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charset="utf-8" Enable GPCDMA in Tegra264 and 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 | 1 + 2 files changed, 5 insertions(+) diff --git a/arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi b/arch/arm64/bo= ot/dts/nvidia/tegra264-p3834.dtsi index 7e2c3e66c2ab..58cd81bc33d7 100644 --- a/arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra264-p3834.dtsi @@ -9,6 +9,10 @@ aliases { }; =20 bus@0 { + dma-controller@8400000 { + status =3D "okay"; + }; + serial@c4e0000 { status =3D "okay"; }; diff --git a/arch/arm64/boot/dts/nvidia/tegra264.dtsi b/arch/arm64/boot/dts= /nvidia/tegra264.dtsi index af077420d7d9..b2f20d4b567a 100644 --- a/arch/arm64/boot/dts/nvidia/tegra264.dtsi +++ b/arch/arm64/boot/dts/nvidia/tegra264.dtsi @@ -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