[PATCH 2/2] dt-bindings: Document the Synopsys ARC HDMI TX bindings

[Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>]

This patch adds documentation of device tree bindings for the Synopsys
HDMI 2.0 TX encoder driver for ARC SoCs.

Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
---
 .../display/bridge/snps,arc-dw-hdmi.txt       | 73 +++++++++++++++++++
 1 file changed, 73 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/display/bridge/snps,arc-dw-hdmi.txt

diff --git a/Documentation/devicetree/bindings/display/bridge/snps,arc-dw-hdmi.txt b/Documentation/devicetree/bindings/display/bridge/snps,arc-dw-hdmi.txt
new file mode 100644
index 000000000000..d5e006b392cc
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/snps,arc-dw-hdmi.txt
@@ -0,0 +1,73 @@
+Synopsys DesignWare HDMI 2.0 TX encoder driver for ARC SoCs
+================================
+
+The HDMI transmitter is a Synopsys DesignWare HDMI 2.0 TX controller IP
+with a companion of Synopsys DesignWare HDMI 2.0 TX PHY IP.
+
+These DT bindings follow the Synopsys DWC HDMI TX bindings defined in
+Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt
+with the following device-specific properties.
+
+
+Required properties:
+
+- compatible : Shall contain
+  - "snps,dw-hdmi-hsdk" for HSDK4xD compatible HDMI TX
+
+- reg: See dw_hdmi.txt.
+- interrupts: HDMI interrupt number.
+- clocks: See dw_hdmi.txt.
+- clock-names: Must contain "iahb" and "isfr" as defined in dw_hdmi.txt.
+- ports: See dw_hdmi.txt. The DWC HDMI shall have one port numbered 0
+  corresponding to the video input of the controller and one port numbered 1
+  corresponding to its HDMI output.
+
+Example:
+
+hdmi: hdmi@0x10000 {
+	compatible = "snps,dw-hdmi-hsdk";
+	reg = <0x10000 0x10000>;
+	reg-io-width = <4>;
+	interrupts = <14>;
+	clocks = <&apbclk>, <&hdmi_pix_clk>;
+	clock-names = "iahb", "isfr";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+			hdmi_enc_input: endpoint {
+				remote-endpoint = <&pgu_output>;
+			};
+		};
+
+		port@1 {
+			reg = <1>;
+			hdmi_enc_out: endpoint {
+				remote-endpoint = <&hdmi_con>;
+			};
+		};
+	};
+};
+
+hdmi-out {
+	...
+
+	port {
+		hdmi_con: endpoint {
+			remote-endpoint = <&hdmi_enc_out>;
+		};
+	};
+};
+
+pgu {
+	...
+
+	port_o: port {
+		pgu_output: endpoint {
+			remote-endpoint = <&hdmi_enc_input>;
+		};
+	};
+};
-- 
2.21.1