[PATCH 3/3] dt-bindings: media: ov772x: Document endpoint props

[Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>]

Document endpoint properties for the parallel bus type and
add them to the example.

Specify a few constraints:
- If the bus type is BT.656 no hsync or vsycn polarities can be
  specified.
- If the bus width is 10 bits, not data-shift can be applied.

Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx>
---
 .../devicetree/bindings/media/i2c/ov772x.yaml | 43 +++++++++++++++++++
 1 file changed, 43 insertions(+)

diff --git a/Documentation/devicetree/bindings/media/i2c/ov772x.yaml b/Documentation/devicetree/bindings/media/i2c/ov772x.yaml
index 75dad40f70cc..3fad5dffd19a 100644
--- a/Documentation/devicetree/bindings/media/i2c/ov772x.yaml
+++ b/Documentation/devicetree/bindings/media/i2c/ov772x.yaml
@@ -50,9 +50,47 @@ properties:
           bus-type:
             enum: [5, 6]

+          bus-width:
+            enum: [8, 10]
+            default: 10
+
+          data-shift:
+            enum: [0, 2]
+            default: 0
+
+          hsync-active:
+            enum: [0, 1]
+            default: 1
+
+          vsync-active:
+            enum: [0, 1]
+            default: 1
+
+          pclk-sample:
+            enum: [0, 1]
+            default: 1
+
           remote-endpoint:
             description: A phandle to the bus receiver's endpoint node.

+        allOf:
+          - if:
+              properties:
+                bus-type:
+                  const: 6
+            then:
+                properties:
+                  hsync-active: false
+                  vsync-active: false
+
+          - if:
+              properties:
+                bus-width:
+                  const: 10
+            then:
+                properties:
+                  data-shift:
+                    const: 0
         required:
           - bus-type

@@ -82,6 +120,11 @@ examples:
             port {
                 ov772x_0: endpoint {
                     bus-type = <5>;
+                    vsync-active = <0>;
+                    hsync-active = <0>;
+                    pclk-sample = <0>;
+                    bus-width = <8>;
+                    data-shift = <0>;
                     remote-endpoint = <&vcap1_in0>;
                 };
             };
--
2.27.0