linux-kernel - [PATCH v1 2/9] dt/bindings: drm/komeda: Add DT bindings for ARM display processor D71

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Date:   Wed, 5 Dec 2018 10:18:57 +0000
From:   "james qian wang (Arm Technology China)" <james.qian.wang@....com>
To:     Liviu Dudau <Liviu.Dudau@....com>
CC:     "Jonathan Chai (Arm Technology China)" <Jonathan.Chai@....com>,
        Brian Starkey <Brian.Starkey@....com>,
        "Julien Yin (Arm Technology China)" <Julien.Yin@....com>,
        "thomas Sun (Arm Technology China)" <thomas.Sun@....com>,
        Alexandru-Cosmin Gheorghe <Alexandru-Cosmin.Gheorghe@....com>,
        "Lowry Li (Arm Technology China)" <Lowry.Li@....com>,
        nd <nd@....com>, Ayan Halder <Ayan.Halder@....com>,
        "Tiannan Zhu (Arm Technology China)" <Tiannan.Zhu@....com>,
        "Jin Gao (Arm Technology China)" <Jin.Gao@....com>,
        "Yiqi Kang (Arm Technology China)" <Yiqi.Kang@....com>,
        "maarten.lankhorst@...ux.intel.com" 
        <maarten.lankhorst@...ux.intel.com>,
        "maxime.ripard@...tlin.com" <maxime.ripard@...tlin.com>,
        "sean@...rly.run" <sean@...rly.run>,
        "airlied@...ux.ie" <airlied@...ux.ie>,
        Liviu Dudau <Liviu.Dudau@....com>,
        "malidp@...s.arm.com" <malidp@...s.arm.com>,
        "dri-devel@...ts.freedesktop.org" <dri-devel@...ts.freedesktop.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        "james qian wang (Arm Technology China)" <james.qian.wang@....com>
Subject: [PATCH v1 2/9] dt/bindings: drm/komeda: Add DT bindings for ARM
 display processor D71

Add DT bindings documentation for the ARM display processor D71 and later
IPs.

Signed-off-by: James (Qian) Wang <james.qian.wang@....com>
---
 .../bindings/display/arm/arm,komeda.txt       | 87 +++++++++++++++++++
 1 file changed, 87 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/arm/arm,komeda.txt

diff --git a/Documentation/devicetree/bindings/display/arm/arm,komeda.txt b/Documentation/devicetree/bindings/display/arm/arm,komeda.txt
new file mode 100644
index 000000000000..d4b53c11b2a2
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/arm/arm,komeda.txt
@@ -0,0 +1,87 @@
+Device Tree bindings for ARM Komeda display driver
+
+Required properties:
+- compatible: Should be "arm,mali-d71"
+- reg: Physical base address and length of the registers in the system
+- interrupts: the interrupt line numbers of the device in the system
+- interrupt-names: contains the names of the IRQs in the order they were
+    provided in the "interrupts" property. Must contain: "DPU".
+- clocks: A list of phandle + clock-specifier pairs, one for each entry
+    in 'clock-names'
+- clock-names: A list of clock names. It should contain:
+      - "pclk": for the APB interface clock
+      - "mclk": for the main processor clock
+- #address-cells: Must be 1
+- #size-cells: Must be 0
+
+Required properties for sub-node: pipeline@nq
+Each device contains one or two pipeline sub-nodes (at least one), each
+pipeline node should provide properties:
+- reg: Zero-indexed identifier for the pipeline
+- clocks: A list of phandle + clock-specifier pairs, one for each entry
+    in 'clock-names'
+- clock-names: should contain:
+      - "aclk": AXI interface clock
+      - "pxclk": pixel clock
+
+- port: each pipeline connect to an encoder input port. The connection is
+    modelled using the OF graph bindings specified in
+    Documentation/devicetree/bindings/graph.txt
+
+Optional properties:
+  - memory-region: phandle to a node describing memory (see
+    Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt)
+    to be used for the framebuffer; if not present, the framebuffer may
+    be located anywhere in memory.
+
+Example:
+/ {
+	...
+
+	dp0: display@...000 {
+		#address-cells = <1>;
+		#size-cells = <0>;
+		compatible = "arm,mali-d71";
+		reg = <0xc00000 0x20000>;
+		interrupts = <0 168 4>;
+		interrupt-names = "DPU";
+		clocks = <&dpu_mclk>, <&dpu_aclk>;
+		clock-names = "mclk", "pclk";
+
+		pl0: pipeline@0 {
+			clocks = <&fpgaosc2>, <&dpu_aclk>;
+			clock-names = "pxclk", "aclk";
+			reg = <0>;
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+					dp0_pl0_out: endpoint {
+						remote-endpoint = <&db_dvi0_in>;
+					};
+				};
+			};
+		};
+		pl1: pipeline@1 {
+			clocks = <&fpgaosc2>, <&dpu_aclk>;
+			clock-names = "pxclk", "aclk";
+			reg = <1>;
+
+			ports {
+				#address-cells = <1>;
+				#size-cells = <0>;
+
+				port@0 {
+					reg = <0>;
+					dp0_pl1_out: endpoint {
+						remote-endpoint = <&db_dvi1_in>;
+					};
+				};
+			};
+		};
+	};
+	...
+};
-- 
2.17.1