ARM: tegra: Enable IOMMU for display controllers on Tegra114

Add iommus properties to the device tree nodes for the two display
controllers found on Tegra114. This will allow the display controllers
to map physically non-contiguous buffers to I/O virtual contiguous
address spaces so that they can be used for scan-out.

Signed-off-by: Thierry Reding <treding@nvidia.com>

diff --git a/arch/arm/boot/dts/tegra114.dtsi b/arch/arm/boot/dts/tegra114.dtsi
index 2c26b07..c8c3b64 100644 (file)
--- a/arch/arm/boot/dts/tegra114.dtsi
+++ b/arch/arm/boot/dts/tegra114.dtsi
@@ -1,5 +1,6 @@
 #include <dt-bindings/clock/tegra114-car.h>
 #include <dt-bindings/gpio/tegra-gpio.h>
+#include <dt-bindings/memory/tegra114-mc.h>
 #include <dt-bindings/pinctrl/pinctrl-tegra.h>
 #include <dt-bindings/interrupt-controller/arm-gic.h>
 
@@ -57,6 +58,8 @@
                        resets = <&tegra_car 27>;
                        reset-names = "dc";
 
+                       iommus = <&mc TEGRA_SWGROUP_DC>;
+
                        nvidia,head = <0>;
 
                        rgb {
@@ -74,6 +77,8 @@
                        resets = <&tegra_car 26>;
                        reset-names = "dc";
 
+                       iommus = <&mc TEGRA_SWGROUP_DCB>;
+
                        nvidia,head = <1>;
 
                        rgb {