dt-bindings: display: panel: Add Samsung AMS639RQ08

The Samsung AMS639RQ08 is a 6.39 inch 1080x2340 MIPI-DSI CMD mode
AMOLED panel used in:
- Xiaomi Mi 9 Lite / CC9 (sdm710-xiaomi-pyxis)
- Xiaomi Mi 9T / Redmi K20 (sm7150-xiaomi-davinci)
- Xiaomi Mi 9T Pro / Redmi K20 Pro (sm8150-xiaomi-raphael)
Add a dt-binding for it.

Signed-off-by: Danila Tikhonov <[e-mail]>
Reviewed-by: Krzysztof Kozlowski <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Signed-off-by: Neil Armstrong <[e-mail]>
Link: https://patchwork.freedesktop.org/patch/msgid/[e-mail]

Documentation/devicetree/bindings/display/panel/samsung,ams639rq08.yaml

···
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/panel/samsung,ams639rq08.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Samsung AMS639RQ08 EA8076-based 6.39" 1080x2340 MIPI-DSI Panel
+
+maintainers:
+  - Danila Tikhonov <[e-mail]>
+  - Jens Reidel <[e-mail]>
+
+description:
+  The Samsung AMS639RQ08 is a 6.39 inch 1080x2340 MIPI-DSI CMD mode AMOLED panel.
+
+allOf:
+  - $ref: panel-common.yaml#
+
+properties:
+  compatible:
+    const: samsung,ams639rq08
+
+  reg:
+    maxItems: 1
+
+  vdd3p3-supply:
+    description: 3.3V source voltage rail
+
+  vddio-supply:
+    description: I/O source voltage rail
+
+  vsn-supply:
+    description: Negative source voltage rail
+
+  vsp-supply:
+    description: Positive source voltage rail
+
+  reset-gpios: true
+  port: true
+
+required:
+  - compatible
+  - reg
+  - vdd3p3-supply
+  - vddio-supply
+  - vsn-supply
+  - vsp-supply
+  - reset-gpios
+  - port
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+
+    dsi {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        panel@0 {
+            compatible = "samsung,ams639rq08";
+            reg = <0>;
+
+            vdd3p3-supply = <&vreg_l18a_2p8>;
+            vddio-supply = <&vreg_l13a_1p8>;
+            vsn-supply = <&vreg_ibb>;
+            vsp-supply = <&vreg_lab>;
+
+            reset-gpios = <&pm6150l_gpios 9 GPIO_ACTIVE_LOW>;
+
+            port {
+                panel_in: endpoint {
+                    remote-endpoint = <&mdss_dsi0_out>;
+                };
+            };
+        };
+    };
+
+...