linux-kernel - [PATCH 1/2] Revert "arm64: tegra: Disable ISO SMMU for Tegra194"

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Message-Id: <20251101-tegra194-dc-mmu-v1-1-8401c45d8f13@gmail.com>
Date: Sat, 01 Nov 2025 18:01:10 -0500
From: Aaron Kling via B4 Relay <devnull+webgeek1234.gmail.com@...nel.org>
To: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, 
 Thierry Reding <thierry.reding@...il.com>, 
 Jonathan Hunter <jonathanh@...dia.com>
Cc: devicetree@...r.kernel.org, linux-tegra@...r.kernel.org, 
 linux-kernel@...r.kernel.org, Aaron Kling <webgeek1234@...il.com>
Subject: [PATCH 1/2] Revert "arm64: tegra: Disable ISO SMMU for Tegra194"

From: Aaron Kling <webgeek1234@...il.com>

This reverts commit ebea268ea583ba4970df425dfef8c8e21d0a4e12.

Mmu is now being enabled for the display controllers.

Signed-off-by: Aaron Kling <webgeek1234@...il.com>
---
 arch/arm64/boot/dts/nvidia/tegra194.dtsi | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm64/boot/dts/nvidia/tegra194.dtsi b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
index 1399342f23e1c4f73b278adc66dfb948fc30d326..854ed6d46aa1d8eedcdfbae1fdde1374adf40337 100644
--- a/arch/arm64/boot/dts/nvidia/tegra194.dtsi
+++ b/arch/arm64/boot/dts/nvidia/tegra194.dtsi
@@ -1807,7 +1807,7 @@ iommu@...00000 {
 			#iommu-cells = <1>;
 
 			nvidia,memory-controller = <&mc>;
-			status = "disabled";
+			status = "okay";
 		};
 
 		smmu: iommu@...00000 {

-- 
2.51.0