linux-kernel - [PATCH v2 2/2] dt/bindings: drm/komeda: Adds SMMU support for D71 devicetree

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Date:   Thu, 6 Jun 2019 09:53:10 +0000
From:   "Lowry Li (Arm Technology China)" <Lowry.Li@....com>
To:     Liviu Dudau <Liviu.Dudau@....com>,
        "james qian wang (Arm Technology China)" <james.qian.wang@....com>,
        "maarten.lankhorst@...ux.intel.com" 
        <maarten.lankhorst@...ux.intel.com>,
        "seanpaul@...omium.org" <seanpaul@...omium.org>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        Brian Starkey <Brian.Starkey@....com>
CC:     "Julien Yin (Arm Technology China)" <Julien.Yin@....com>,
        "Jonathan Chai (Arm Technology China)" <Jonathan.Chai@....com>,
        Ayan Halder <Ayan.Halder@....com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        nd <nd@....com>
Subject: [PATCH v2 2/2] dt/bindings: drm/komeda: Adds SMMU support for D71
 devicetree

Updates the device-tree doc about how to enable SMMU by devicetree.

Signed-off-by: Lowry Li (Arm Technology China) <lowry.li@....com>
Reviewed-by: Liviu Dudau <liviu.dudau@....com>
Reviewed-by: James Qian Wang (Arm Technology China) <james.qian.wang@....com>

---
 Documentation/devicetree/bindings/display/arm,komeda.txt | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/arm,komeda.txt b/Documentation/devicetree/bindings/display/arm,komeda.txt
index 02b2265..b12c045 100644
--- a/Documentation/devicetree/bindings/display/arm,komeda.txt
+++ b/Documentation/devicetree/bindings/display/arm,komeda.txt
@@ -11,6 +11,10 @@ Required properties:
       - "pclk": for the APB interface clock
 - #address-cells: Must be 1
 - #size-cells: Must be 0
+- iommus: configure the stream id to IOMMU, Must be configured if want to
+    enable iommu in display. for how to configure this node please reference
+        devicetree/bindings/iommu/arm,smmu-v3.txt,
+        devicetree/bindings/iommu/iommu.txt
 
 Required properties for sub-node: pipeline@nq
 Each device contains one or two pipeline sub-nodes (at least one), each
@@ -44,6 +48,9 @@ Example:
 		interrupts = <0 168 4>;
 		clocks = <&dpu_mclk>, <&dpu_aclk>;
 		clock-names = "mclk", "pclk";
+		iommus = <&smmu 0>, <&smmu 1>, <&smmu 2>, <&smmu 3>,
+			<&smmu 4>, <&smmu 5>, <&smmu 6>, <&smmu 7>,
+			<&smmu 8>, <&smmu 9>;
 
 		dp0_pipe0: pipeline@0 {
 			clocks = <&fpgaosc2>, <&dpu_aclk>;
-- 
1.9.1