media: dt-bindings: media: renesas,vin: Add r8a779a0 support

Document support for the VIN module in the Renesas V3U (r8a779a0) SoC.
The V3U is different from other SoCs as it have 32 instead of 8 (most of
Gen3) or 16 (V3H) VIN instances. The VIN instances are also connected to
a new IP the R-Car ISP Channel Selector.
Signed-off-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

Documentation/devicetree/bindings/media/renesas,vin.yaml

@@ -51,6 +51,7 @@ properties:
               - renesas,vin-r8a77980 # R-Car V3H
               - renesas,vin-r8a77990 # R-Car E3
               - renesas,vin-r8a77995 # R-Car D3
+              - renesas,vin-r8a779a0 # R-Car V3U
 
   reg:
     maxItems: 1
@@ -111,7 +112,7 @@ properties:
     description: VIN channel number
     $ref: /schemas/types.yaml#/definitions/uint32
     minimum: 0
-    maximum: 15
+    maximum: 31
 
   ports:
     $ref: /schemas/graph.yaml#/properties/ports
@@ -187,6 +188,29 @@ properties:
           - required:
               - endpoint@3
 
+      port@2:
+        $ref: /schemas/graph.yaml#/properties/port
+        description:
+          Input port node, multiple endpoints describing all the R-Car ISP
+          modules connected the VIN.
+
+        properties:
+          endpoint@0:
+            $ref: /schemas/graph.yaml#/properties/endpoint
+            description: Endpoint connected to ISP0.
+
+          endpoint@1:
+            $ref: /schemas/graph.yaml#/properties/endpoint
+            description: Endpoint connected to ISP1.
+
+          endpoint@2:
+            $ref: /schemas/graph.yaml#/properties/endpoint
+            description: Endpoint connected to ISP2.
+
+          endpoint@3:
+            $ref: /schemas/graph.yaml#/properties/endpoint
+            description: Endpoint connected to ISP3.
+
 required:
   - compatible
   - reg