linux-kernel - [PATCH v4 2/3] arm64: dts: renesas: draak: Describe CVBS input

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Date:   Mon, 21 May 2018 16:45:41 +0200
From:   Jacopo Mondi <jacopo+renesas@...ndi.org>
To:     niklas.soderlund@...natech.se, laurent.pinchart@...asonboard.com,
        horms@...ge.net.au, geert@...der.be, magnus.damm@...il.com,
        robh+dt@...nel.org
Cc:     Jacopo Mondi <jacopo+renesas@...ndi.org>,
        linux-renesas-soc@...r.kernel.org, devicetree@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v4 2/3] arm64: dts: renesas: draak: Describe CVBS input

Describe CVBS video input through analog video decoder ADV7180
connected to video input interface VIN4.

The video input signal path is shared with HDMI video input, and
selected by on-board switches SW-53 and SW-54 with CVBS input selected
by the default switches configuration.

Signed-off-by: Jacopo Mondi <jacopo+renesas@...ndi.org>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@...natech.se>

---
v3 -> v4:
- Use 'adi,adv7180cp' compatible string in place of just 'adi,adv7180'
  as suggested by Laurent.
- Re-structure CVBS input ports definition according to adv7180cp
  bindings: add port@0 for composite input, add port@3 for parallel
  video output.
- Change node label to 'composite-in' as in Gose board bindings.

v2 -> v3:
- Add comment to describe the shared input video path.
- Add my SoB and Niklas' R-b tags.
---
 arch/arm64/boot/dts/renesas/r8a77995-draak.dts | 68 ++++++++++++++++++++++++++
 1 file changed, 68 insertions(+)

diff --git a/arch/arm64/boot/dts/renesas/r8a77995-draak.dts b/arch/arm64/boot/dts/renesas/r8a77995-draak.dts
index 9d73de8..ad59032 100644
--- a/arch/arm64/boot/dts/renesas/r8a77995-draak.dts
+++ b/arch/arm64/boot/dts/renesas/r8a77995-draak.dts
@@ -59,6 +59,16 @@
 		};
 	};
 
+	composite-in {
+		compatible = "composite-video-connector";
+
+		port {
+			composite_con_in: endpoint {
+				remote-endpoint = <&adv7180_in>;
+			};
+		};
+	};
+
 	memory@...00000 {
 		device_type = "memory";
 		/* first 128MB is reserved for secure area. */
@@ -142,6 +152,11 @@
 		groups = "usb0";
 		function = "usb0";
 	};
+
+	vin4_pins_cvbs: vin4 {
+		groups = "vin4_data8", "vin4_sync", "vin4_clk";
+		function = "vin4";
+	};
 };
 
 &i2c0 {
@@ -154,6 +169,39 @@
 		reg = <0x50>;
 		pagesize = <8>;
 	};
+
+	composite-in@20 {
+		compatible = "adi,adv7180cp";
+		reg = <0x20>;
+
+		port {
+			#address-cells = <1>;
+			#size-cells = <0>;
+
+			port@0 {
+				reg = <0>;
+				adv7180_in: endpoint {
+					remote-endpoint = <&composite_con_in>;
+				};
+			};
+
+			port@3 {
+				reg = <3>;
+
+				/*
+				 * The VIN4 video input path is shared between
+				 * CVBS and HDMI inputs through SW[49-53]
+				 * switches.
+				 *
+				 * CVBS is the default selection, link it to
+				 * VIN4 here.
+				 */
+				adv7180_out: endpoint {
+					remote-endpoint = <&vin4_in>;
+				};
+			};
+		};
+	};
 };
 
 &i2c1 {
@@ -246,3 +294,23 @@
 	timeout-sec = <60>;
 	status = "okay";
 };
+
+&vin4 {
+	pinctrl-0 = <&vin4_pins_cvbs>;
+	pinctrl-names = "default";
+
+	status = "okay";
+
+	ports {
+		#address-cells = <1>;
+		#size-cells = <0>;
+
+		port@0 {
+			reg = <0>;
+
+			vin4_in: endpoint {
+				remote-endpoint = <&adv7180_out>;
+			};
+		};
+	};
+};
-- 
2.7.4