dt-bindings: display: bridge: Add binding for R-Car MIPI DSI/CSI-2 TX

The R-Car MIPI DSI/CSI-2 TX is embedded in the Renesas R-Car V3U SoC. It
can operate in either DSI or CSI-2 mode, with up to four data lanes.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
Reviewed-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Acked-by: Sam Ravnborg <sam@ravnborg.org>
Reviewed-by: Rob Herring <robh@kernel.org>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

Documentation/devicetree/bindings/display/bridge/renesas,dsi-csi2-tx.yaml

@@ -0,0 +1,118 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/bridge/renesas,dsi-csi2-tx.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Renesas R-Car MIPI DSI/CSI-2 Encoder
+
+maintainers:
+  - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
+
+description: |
+  This binding describes the MIPI DSI/CSI-2 encoder embedded in the Renesas
+  R-Car V3U SoC. The encoder can operate in either DSI or CSI-2 mode, with up
+  to four data lanes.
+
+properties:
+  compatible:
+    enum:
+      - renesas,r8a779a0-dsi-csi2-tx    # for V3U
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: Functional clock
+      - description: DSI (and CSI-2) functional clock
+      - description: PLL reference clock
+
+  clock-names:
+    items:
+      - const: fck
+      - const: dsi
+      - const: pll
+
+  power-domains:
+    maxItems: 1
+
+  resets:
+    maxItems: 1
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Parallel input port
+
+      port@1:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: DSI/CSI-2 output port
+
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#
+            unevaluatedProperties: false
+
+            properties:
+              data-lanes:
+                minItems: 1
+                maxItems: 4
+
+            required:
+              - data-lanes
+
+    required:
+      - port@0
+      - port@1
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - power-domains
+  - resets
+  - ports
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/r8a779a0-cpg-mssr.h>
+    #include <dt-bindings/power/r8a779a0-sysc.h>
+
+    dsi0: dsi-encoder@fed80000 {
+        compatible = "renesas,r8a779a0-dsi-csi2-tx";
+        reg = <0xfed80000 0x10000>;
+        power-domains = <&sysc R8A779A0_PD_ALWAYS_ON>;
+        clocks = <&cpg CPG_MOD 415>,
+                 <&cpg CPG_CORE R8A779A0_CLK_DSI>,
+                 <&cpg CPG_CORE R8A779A0_CLK_CP>;
+        clock-names = "fck", "dsi", "pll";
+        resets = <&cpg 415>;
+
+        ports {
+            #address-cells = <1>;
+            #size-cells = <0>;
+
+            port@0 {
+                reg = <0>;
+                dsi0_in: endpoint {
+                    remote-endpoint = <&du_out_dsi0>;
+                };
+            };
+
+            port@1 {
+                reg = <1>;
+                dsi0_out: endpoint {
+                    data-lanes = <1 2>;
+                    remote-endpoint = <&sn65dsi86_in>;
+                };
+            };
+        };
+    };
+...

MAINTAINERS

@@ -6413,6 +6413,7 @@ L:	dri-devel@lists.freedesktop.org
 L:	linux-renesas-soc@vger.kernel.org
 S:	Supported
 T:	git git://linuxtv.org/pinchartl/media drm/du/next
+F:	Documentation/devicetree/bindings/display/bridge/renesas,dsi-csi2-tx.yaml
 F:	Documentation/devicetree/bindings/display/bridge/renesas,dw-hdmi.yaml
 F:	Documentation/devicetree/bindings/display/bridge/renesas,lvds.yaml
 F:	Documentation/devicetree/bindings/display/renesas,du.yaml