linux-kernel - [PATCH 1/4] ARM: tegra: Add IOMMU node to GK20A

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Date:	Wed, 1 Jul 2015 18:13:45 +0900
From:	Alexandre Courbot <acourbot@...dia.com>
To:	Thierry Reding <thierry.reding@...il.com>,
	Stephen Warren <swarren@...dotorg.org>
CC:	linux-arm-kernel@...ts.infradead.org, linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org, gnurou@...il.com,
	Alexandre Courbot <acourbot@...dia.com>
Subject: [PATCH 1/4] ARM: tegra: Add IOMMU node to GK20A

Nouveau can make use of the IOMMU to make physical appear linear in the
GPU address space.

Signed-off-by: Alexandre Courbot <acourbot@...dia.com>
---
 arch/arm/boot/dts/tegra124.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/boot/dts/tegra124.dtsi b/arch/arm/boot/dts/tegra124.dtsi
index 13cc7ca5e031..bffe90236bf8 100644
--- a/arch/arm/boot/dts/tegra124.dtsi
+++ b/arch/arm/boot/dts/tegra124.dtsi
@@ -188,6 +188,9 @@
 		clock-names = "gpu", "pwr";
 		resets = <&tegra_car 184>;
 		reset-names = "gpu";
+
+		iommus = <&mc TEGRA_SWGROUP_GPU>;
+
 		status = "disabled";
 	};
 
-- 
2.4.4

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