[PATCH v12 08/10] dt-bindings: display: bridge: it6505: Add mode-switch support

Pin-yen Lin
2023-02-21T09:52:53Z

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@chromium.org>

---

Changes in v12:
- Fixed the schema of "data-lanes" property for it6505
- Reworded the description of the mode-switch property

Changes in v11:
- Updated the description of the endpoints in the bindings
- Referenced video-interfaces.yaml instead for the endpoints binding
- Removed duplicated definitions from inherited schema

Changes in v9:
- Fixed subject prefix again
- Changed the naming of the example node for it6505

Changes in v8:
- Updated bindings for data-lanes property
- Fixed subject prefix

Changes in v7:
- Fixed issues reported by dt_binding_check.
- Updated the schema and the example dts for data-lanes.
- Changed to generic naming for the example dts node.

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

.../bindings/display/bridge/ite,it6505.yaml | 101 +++++++++++++++---
1 file changed, 88 insertions(+), 13 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
index c9a882ee6d98..348b02f26041 100644
--- a/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
+++ b/Documentation/devicetree/bindings/display/bridge/ite,it6505.yaml
@@ -75,22 +75,49 @@ properties:
port@1:
$ref: /schemas/graph.yaml#/$defs/port-base
unevaluatedProperties: false
- description: Video port for DP output
+ description:
+ Video port for DP output. Each endpoint connects to a video output
+ downstream, and the "data-lanes" property is used to describe the pin
+ connections. 0, 1, 2, 3 in "data-lanes" maps to TX0, TX1, TX2, TX3,
+ respectively.

- properties:
- endpoint:
- $ref: /schemas/graph.yaml#/$defs/endpoint-base
+
+ patternProperties:
+ "^endpoint@[01]$":
+ $ref: /schemas/media/video-interfaces.yaml#
unevaluatedProperties: false

properties:
+ reg: true
+
+ remote-endpoint: true
+
data-lanes:
- minItems: 1
- uniqueItems: true
- items:
- - enum: [ 0, 1 ]
- - const: 1
- - const: 2
- - const: 3
+ oneOf:
+ - items:
+ - enum: [0, 3]
+
+ - items:
+ - const: 0
+ - const: 1
+
+ - items:
+ - const: 3
+ - const: 2
+
+ - items:
+ - const: 0
+ - const: 1
+ - const: 2
+ - const: 3
+
+ mode-switch:
+ type: boolean
+ description: Serves as Type-C mode switch if present.
+
+ required:
+ - reg
+ - remote-endpoint

required:
- port@0
@@ -102,7 +129,6 @@ required:
- pwr18-supply
- interrupts
- reset-gpios
- - extcon
- ports

additionalProperties: false
@@ -139,8 +165,11 @@ examples:
};

port@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
reg = <1>;
- it6505_out: endpoint {
+ it6505_out: endpoint@0 {
+ reg = <0>;
remote-endpoint = <&dp_in>;
data-lanes = <0 1>;
};
@@ -148,3 +177,49 @@ examples:
};
};
};
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+
+ i2c {
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ dp-bridge@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>;
+
+ ports {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ port@0 {
+ reg = <0>;
+ it6505_dpi_in: endpoint {
+ remote-endpoint = <&dpi_out>;
+ };
+ };
+ port@1 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <1>;
+ ite_typec0: endpoint@0 {
+ reg = <0>;
+ mode-switch;
+ data-lanes = <0 1>;
+ remote-endpoint = <&typec_port0>;
+ };
+ ite_typec1: endpoint@1 {
+ reg = <1>;
+ mode-switch;
+ data-lanes = <3 2>;
+ remote-endpoint = <&typec_port1>;
+ };
+ };
+ };
+ };
+ };
--
2.39.2.637.g21b0678d19-goog