Add fix for Tegra GPU display with IOMMU, Add QCom IOMMU for Dragonboard display

1 files changed, 39 insertions, 0 deletions

diff --git a/arm-tegra-fix-gpu-iommu.patch b/arm-tegra-fix-gpu-iommu.patch
new file mode 100644
index 000000000..c775c88b4
--- /dev/null
+++ b/arm-tegra-fix-gpu-iommu.patch
@@ -0,0 +1,39 @@
+From patchwork Sun Jul  9 16:36:14 2017
+Content-Type: text/plain; charset="utf-8"
+MIME-Version: 1.0
+Content-Transfer-Encoding: 7bit
+Subject: ARM: tegra: Register host1x node with iommu binding on tegra124
+From: Paul Kocialkowski <contact@paulk.fr>
+X-Patchwork-Id: 9831825
+Message-Id: <20170709163614.6746-1-contact@paulk.fr>
+To: linux-arm-kernel@lists.infradead.org, linux-tegra@vger.kernel.org,
+ linux-kernel@vger.kernel.org
+Cc: Thierry Reding <thierry.reding@gmail.com>,
+ Stephen Warren <swarren@wwwdotorg.org>,
+ Mikko Perttunen <mperttunen@nvidia.com>,
+ Paul Kocialkowski <contact@paulk.fr>, 
+ Jonathan Hunter <jonathanh@nvidia.com>
+Date: Sun,  9 Jul 2017 19:36:14 +0300
+
+This registers the host1x node with the SMMU (as HC swgroup) to allow
+the host1x code to attach to it. It avoid failing the probe sequence,
+which resulted in the tegra drm driver not probing and thus nothing
+being displayed on-screen.
+
+Signed-off-by: Paul Kocialkowski <contact@paulk.fr>
+---
+ arch/arm/boot/dts/tegra124.dtsi | 1 +
+ 1 file changed, 1 insertion(+)
+
+diff --git a/arch/arm/boot/dts/tegra124.dtsi b/arch/arm/boot/dts/tegra124.dtsi
+index 187a36c6d0fc..b3b89befffeb 100644
+--- a/arch/arm/boot/dts/tegra124.dtsi
++++ b/arch/arm/boot/dts/tegra124.dtsi
+@@ -85,6 +85,7 @@
+ 		clocks = <&tegra_car TEGRA124_CLK_HOST1X>;
+ 		resets = <&tegra_car 28>;
+ 		reset-names = "host1x";
++		iommus = <&mc TEGRA_SWGROUP_HC>;
+ 
+ 		#address-cells = <2>;
+ 		#size-cells = <2>;