dt-bindings: display: bridge: Convert simple-bridge bindings to YAML

The simple-bridge driver supports multiple simple or dumb bridges,
covered by different compatible strings but otherwise identical DT
bindings. Some of those bridges have undocumented bindings, while others
are documented in text form in separate files. Group them all in a
single binding and convert it to YAML.

The psave-gpios property of the adi,adv7123 is dropped, as it isn't
supported by the driver and isn't specified in any DT file upstream.
Support for power saving is available through the enable-gpios property
that should cover all the needs of the ADV7123 (as the device only has a
/PSAVE pin and no enable pin).

Signed-off-by: Laurent Pinchart <[e-mail]>
Acked-by: Maxime Ripard <[e-mail]>
Reviewed-by: Rob Herring <[e-mail]>

Documentation/devicetree/bindings/display/bridge/adi,adv7123.txt

···
-Analog Devices ADV7123 Video DAC
---------------------------------
-
-The ADV7123 is a digital-to-analog converter that outputs VGA signals from a
-parallel video input.
-
-Required properties:
-
-- compatible: Should be "adi,adv7123"
-
-Optional properties:
-
-- psave-gpios: Power save control GPIO
-
-Required nodes:
-
-The ADV7123 has two video ports. Their connections are modeled using the OF
-graph bindings specified in Documentation/devicetree/bindings/graph.txt.
-
-- Video port 0 for DPI input
-- Video port 1 for VGA output
-
-
-Example
--------
-
-	adv7123: encoder@0 {
-		compatible = "adi,adv7123";
-
-		ports {
-			#address-cells = <1>;
-			#size-cells = <0>;
-
-			port@0 {
-				reg = <0>;
-
-				adv7123_in: endpoint@0 {
-					remote-endpoint = <&dpi_out>;
-				};
-			};
-
-			port@1 {
-				reg = <1>;
-
-				adv7123_out: endpoint@0 {
-					remote-endpoint = <&vga_connector_in>;
-				};
-			};
-		};
-	};

Documentation/devicetree/bindings/display/bridge/dumb-vga-dac.txt

···
-Dumb RGB to VGA DAC bridge
----------------------------
-
-This binding is aimed for dumb RGB to VGA DAC based bridges that do not require
-any configuration.
-
-Required properties:
-
-- compatible: Must be "dumb-vga-dac"
-
-Required nodes:
-
-This device has two video ports. Their connections are modelled using the OF
-graph bindings specified in Documentation/devicetree/bindings/graph.txt.
-
-- Video port 0 for RGB input
-- Video port 1 for VGA output
-
-Optional properties:
-- vdd-supply: Power supply for DAC
-
-Example
--------
-
-bridge {
-	compatible = "dumb-vga-dac";
-	#address-cells = <1>;
-	#size-cells = <0>;
-
-	ports {
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		port@0 {
-			reg = <0>;
-
-			vga_bridge_in: endpoint {
-				remote-endpoint = <&tcon0_out_vga>;
-			};
-		};
-
-		port@1 {
-			reg = <1>;
-
-			vga_bridge_out: endpoint {
-				remote-endpoint = <&vga_con_in>;
-			};
-		};
-	};
-};

Documentation/devicetree/bindings/display/bridge/simple-bridge.yaml

···
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/bridge/simple-bridge.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Transparent non-programmable DRM bridges
+
+maintainers:
+  - Laurent Pinchart <[e-mail]>
+  - Maxime Ripard <[e-mail]>
+
+description: |
+  This binding supports transparent non-programmable bridges that don't require
+  any configuration, with a single input and a single output.
+
+properties:
+  compatible:
+    oneOf:
+      - items:
+        - enum:
+          - ti,ths8134a
+          - ti,ths8134b
+        - const: ti,ths8134
+      - enum:
+        - adi,adv7123
+        - dumb-vga-dac
+        - ti,opa362
+        - ti,ths8134
+        - ti,ths8135
+
+  ports:
+    type: object
+    description: |
+      This device has two video ports. Their connections are modeled using the
+      OF graph bindings specified in Documentation/devicetree/bindings/graph.txt.
+    properties:
+      '#address-cells':
+        const: 1
+
+      '#size-cells':
+        const: 0
+
+      port@0:
+        type: object
+        description: The bridge input
+
+      port@1:
+        type: object
+        description: The bridge output
+
+    required:
+      - port@0
+      - port@1
+
+    additionalProperties: false
+
+  enable-gpios:
+    maxItems: 1
+    description: GPIO controlling bridge enable
+
+  vdd-supply:
+    maxItems: 1
+    description: Power supply for the bridge
+
+required:
+  - compatible
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    bridge {
+        compatible = "ti,ths8134a", "ti,ths8134";
+
+        ports {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            port@0 {
+                reg = <0>;
+
+                vga_bridge_in: endpoint {
+                    remote-endpoint = <&tcon0_out_vga>;
+                };
+            };
+
+            port@1 {
+                reg = <1>;
+
+                vga_bridge_out: endpoint {
+                    remote-endpoint = <&vga_con_in>;
+                };
+            };
+        };
+    };
+
+...

Documentation/devicetree/bindings/display/bridge/ti,ths813x.txt

···
-THS8134 and THS8135 Video DAC
------------------------------
-
-This is the binding for Texas Instruments THS8134, THS8134A, THS8134B and
-THS8135 Video DAC bridges.
-
-Required properties:
-
-- compatible: Must be one of
-  "ti,ths8134"
-  "ti,ths8134a," "ti,ths8134"
-  "ti,ths8134b", "ti,ths8134"
-  "ti,ths8135"
-
-Required nodes:
-
-This device has two video ports. Their connections are modelled using the OF
-graph bindings specified in Documentation/devicetree/bindings/graph.txt.
-
-- Video port 0 for RGB input
-- Video port 1 for VGA output
-
-Example
--------
-
-vga-bridge {
-	compatible = "ti,ths8135";
-	#address-cells = <1>;
-	#size-cells = <0>;
-
-	ports {
-		#address-cells = <1>;
-		#size-cells = <0>;
-
-		port@0 {
-			reg = <0>;
-
-			vga_bridge_in: endpoint {
-				remote-endpoint = <&lcdc_out_vga>;
-			};
-		};
-
-		port@1 {
-			reg = <1>;
-
-			vga_bridge_out: endpoint {
-				remote-endpoint = <&vga_con_in>;
-			};
-		};
-	};
-};