[PATCH v6 6/7] dt/bindings: drm/bridge: it6505: Add mode-switch support

[Pin-yen Lin]

ITE IT6505 can be used in systems to switch the DP traffic between
two downstreams, which can be USB Type-C DisplayPort alternate mode
lane or regular DisplayPort output ports.

Update the binding to accommodate this usage by introducing a
data-lanes and a mode-switch property on endpoints.

Signed-off-by: Pin-yen Lin <treapking at chromium.org>

---

Changes in v6:
- Remove switches node and use endpoints and data-lanes property to
  describe the connections.

 .../bindings/display/bridge/ite,it6505.yaml   | 94 ++++++++++++++++++-
 1 file changed, 90 insertions(+), 4 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
index 833d11b2303a..b4b9881c7759 100644
--- a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
@@ -52,9 +52,53 @@ properties:
     maxItems: 1
     description: extcon specifier for the Power Delivery
 
-  port:
-    $ref: /schemas/graph.yaml#/properties/port
-    description: A port node pointing to DPI host port node
+  data-lanes:
+    maxItems: 1
+    description: restrict the dp output data-lanes with value of 1-4
+
+  max-pixel-clock-khz:
+    maxItems: 1
+    description: restrict max pixel clock
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port at 0:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: A port node pointing to DPI host port node
+
+      port at 1:
+        $ref: /schemas/graph.yaml#/properties/port-base
+        description:
+          Video port for panel or connector.
+
+        patternProperties:
+          "^endpoint@[01]$":
+            $ref: /schemas/media/video-interfaces.yaml#
+            type: object
+            unevaluatedProperties: false
+
+            properties:
+              reg:
+                maxItems: 1
+
+              remote-endpoint: true
+
+              data-lanes:
+                minItems: 1
+                uniqueItems: true
+                items:
+                  - enum: [ 0, 1, 2, 3]
+
+              mode-switch:
+                type: boolean
+                description: Register this node as a Type-C mode switch or not.
+
+	    required:
+        - reg
+	      - remote-endpoint
 
 required:
   - compatible
@@ -62,7 +106,7 @@ required:
   - pwr18-supply
   - interrupts
   - reset-gpios
-  - extcon
+  - ports
 
 additionalProperties: false
 
@@ -92,3 +136,45 @@ examples:
             };
         };
     };
+  - |
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    &i2c3 {
+        clock-frequency = <100000>;
+
+        it6505dptx: it6505dptx at 5c {
+            compatible = "ite,it6505";
+            interrupts = <8 IRQ_TYPE_LEVEL_LOW 8 0>;
+            reg = <0x5c>;
+            pinctrl-names = "default";
+            pinctrl-0 = <&it6505_pins>;
+            ovdd-supply = <&mt6366_vsim2_reg>;
+            pwr18-supply = <&pp1800_dpbrdg_dx>;
+            reset-gpios = <&pio 177 0>;
+            hpd-gpios = <&pio 10 0>;
+
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+                port at 0 {
+                    reg = <0>;
+                    it6505_in: endpoint {
+                        remote-endpoint = <&dpi_out>;
+                    };
+                };
+                port at 1 {
+                    reg = <1>;
+                    ite_typec0: endpoint at 0 {
+                        mode-switch;
+                        data-lanes = <0 1>;
+                        remote-endpoint = <&typec_port0>;
+                    };
+                    ite_typec1: endpoint at 1 {
+                        mode-switch;
+                        data-lanes = <2 3>;
+                        remote-endpoint = <&typec_port1>;
+                    };
+                };
+            };
+        };
+    };
-- 
2.38.1.584.g0f3c55d4c2-goog