dt-bindings: display: panel: Add Raydium RM67200

The Rockchip W552793DBA-V10 display/touchscreen board contains a
Wanchanglong W552793BAA panel, which in turn is using a Raydium
RM67200 MIPI-DSI controller. Add a DT binding for the DSI panel.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20250225-raydium-rm67200-v3-1-d9e1010dd8ab@kernel.org
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20250225-raydium-rm67200-v3-1-d9e1010dd8ab@kernel.org

Documentation/devicetree/bindings/display/panel/raydium,rm67200.yaml

@@ -0,0 +1,72 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/raydium,rm67200.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Raydium RM67200 based MIPI-DSI panels
+
+maintainers:
+  - Sebastian Reichel <sebastian.reichel@collabora.com>
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    items:
+      - enum:
+          - wanchanglong,w552793baa
+      - const: raydium,rm67200
+
+  reg:
+    maxItems: 1
+
+  vdd-supply:
+    description: 2.8V Logic voltage
+
+  iovcc-supply:
+    description: 1.8V IO voltage
+
+  vsp-supply:
+    description: positive 5.5V voltage
+
+  vsn-supply:
+    description: negative 5.5V voltage
+
+  backlight: true
+  port: true
+  reset-gpios: true
+
+required:
+  - compatible
+  - port
+  - reg
+  - reset-gpios
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    dsi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+        panel@0 {
+            compatible = "wanchanglong,w552793baa", "raydium,rm67200";
+            reg = <0>;
+
+            vdd-supply = <&regulator1>;
+            iovcc-supply = <&regulator2>;
+            vsp-supply = <&regulator3>;
+            vsn-supply = <&regulator4>;
+            reset-gpios = <&gpiobank 42 GPIO_ACTIVE_LOW>;
+
+            port {
+                panel0_in: endpoint {
+                    remote-endpoint = <&dsi0_out>;
+                };
+            };
+        };
+    };
+...