dt-bindings: display: add Unisoc's mipi dsi&dphy bindings

Adds MIPI DSI Master and MIPI DSI-PHY (D-PHY)
support for Unisoc's display subsystem.

RFC v7:
  - Fix DTC unit name warnings
  - Fix the problem of maintainers

Cc: Orson Zhai <orsonzhai@gmail.com>
Cc: Chunyan Zhang <zhang.lyra@gmail.com>
Signed-off-by: Kevin Tang <kevin.tang@unisoc.com>

Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-host.yaml

@@ -0,0 +1,98 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/sprd/sprd,sharkl3-dsi-host.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Unisoc MIPI DSI Controller
+
+maintainers:
+  - Kevin Tang <kevin.tang@unisoc.com>
+
+properties:
+  compatible:
+    const: sprd,sharkl3-dsi-host
+
+  reg:
+    maxItems: 1
+    description:
+      Physical base address and length of the registers set for the device.
+
+  interrupts:
+    maxItems: 2
+    description:
+      Should contain DSI interrupt.
+
+  clocks:
+    minItems: 1
+
+  clock-names:
+    items:
+      - const: clk_src_96m
+
+  power-domains:
+    maxItems: 1
+    description: A phandle to DSIM power domain node
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  port@0:
+    type: object
+    description:
+      A port node with endpoint definitions as defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+      That port should be the input endpoint, usually coming from
+      the associated DPU.
+  port@1:
+    type: object
+    description:
+      A port node with endpoint definitions as defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+      That port should be the output endpoint, usually output to
+      the associated DPHY.
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - clocks
+  - clock-names
+  - port@0
+  - port@1
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/clock/sprd,sc9860-clk.h>
+    dsi: dsi@63100000 {
+        compatible = "sprd,sharkl3-dsi-host";
+        reg = <0x63100000 0x1000>;
+        interrupts = <GIC_SPI 48 IRQ_TYPE_LEVEL_HIGH>,
+          <GIC_SPI 49 IRQ_TYPE_LEVEL_HIGH>;
+        clock-names = "clk_src_96m";
+        clocks = <&pll CLK_TWPLL_96M>;
+
+        #address-cells = <1>;
+        #size-cells = <0>;
+        port@0 {
+            reg = <0>;
+            dsi_in: endpoint {
+                remote-endpoint = <&dpu_out>;
+            };
+        };
+
+        port@1 {
+            reg = <1>;
+            dsi_out: endpoint {
+                remote-endpoint = <&dphy_in>;
+            };
+        };
+    };

Documentation/devicetree/bindings/display/sprd/sprd,sharkl3-dsi-phy.yaml

@@ -0,0 +1,75 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/sprd/sprd,sharkl3-dsi-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Unisoc MIPI DSI-PHY (D-PHY)
+
+maintainers:
+  - Kevin Tang <kevin.tang@unisoc.com>
+
+properties:
+  compatible:
+    const: sprd,sharkl3-dsi-phy
+
+  reg:
+    maxItems: 1
+    description:
+      Must be the dsi controller base address.
+
+  "#address-cells":
+    const: 1
+
+  "#size-cells":
+    const: 0
+
+  port@0:
+    type: object
+    description:
+      A port node with endpoint definitions as defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+      That port should be the output endpoint, usually output to
+      the associated panel.
+  port@1:
+    type: object
+    description:
+      A port node with endpoint definitions as defined in
+      Documentation/devicetree/bindings/media/video-interfaces.txt.
+      That port should be the input endpoint, usually coming from
+      the associated DSI controller.
+
+required:
+  - compatible
+  - reg
+  - port@0
+  - port@1
+  - "#address-cells"
+  - "#size-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    dphy: dphy@63100000 {
+        compatible = "sprd,sharkl3-dsi-phy";
+        reg = <0x63100000 0x1000>;
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        /* input port*/
+        port@1 {
+            reg = <1>;
+            dphy_in: endpoint {
+    	          remote-endpoint = <&dsi_out>;
+            };
+        };
+
+        /* output port */
+        port@0 {
+    	      reg = <0>;
+    	      dphy_out: endpoint {
+    		        remote-endpoint = <&panel_in>;
+    	      };
+        };
+    };