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dt-bindings: display: add google, cros-ec-anx7688.yaml 

ChromeOS EC ANX7688 is a display bridge that converts HDMI 2.0 to
DisplayPort 1.3 Ultra-HDi (4096x2160p60). It is an Analogix ANX7688 chip
which is connected to and operated by the ChromeOS Embedded Controller
(See google,cros-ec.yaml). It is accessed using I2C tunneling through
the EC and therefore its node should be a child of an EC I2C tunnel node
(See google,cros-ec-i2c-tunnel.yaml).

ChromOS EC ANX7688 is found on Acer Chromebook R13 (elm)

Signed-off-by: Dafna Hirschfeld <dafna.hirschfeld@collabora.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210518141927.24795-2-dafna.hirschfeld@collabora.com
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Dafna Hirschfeld 2021-05-18 16:19:26 +02:00 committed by Robert Foss
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# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/display/bridge/google,cros-ec-anx7688.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#
title: ChromeOS EC ANX7688 HDMI to DP Converter through Type-C Port
maintainers:
- Nicolas Boichat <drinkcat@chromium.org>
- Enric Balletbo i Serra <enric.balletbo@collabora.com>
description: |
ChromeOS EC ANX7688 is a display bridge that converts HDMI 2.0 to
DisplayPort 1.3 Ultra-HDi (4096x2160p60). It is an Analogix ANX7688 chip
which is connected to and operated by the ChromeOS Embedded Controller
(See google,cros-ec.yaml). It is accessed using I2C tunneling through
the EC and therefore its node should be a child of an EC I2C tunnel node
(See google,cros-ec-i2c-tunnel.yaml).
properties:
compatible:
const: google,cros-ec-anx7688
reg:
maxItems: 1
description: I2C address of the device.
ports:
$ref: /schemas/graph.yaml#/properties/ports
properties:
port@0:
$ref: /schemas/graph.yaml#/properties/port
description: Video port for HDMI input.
port@1:
$ref: /schemas/graph.yaml#/properties/port
description: USB Type-c connector.
required:
- port@0
- port@1
required:
- compatible
- reg
- ports
additionalProperties: false
examples:
- |
i2c_tunnel_b: i2c-tunnel1 {
compatible = "google,cros-ec-i2c-tunnel";
google,remote-bus = <1>;
#address-cells = <1>;
#size-cells = <0>;
anx7688: anx7688@2c {
compatible = "google,cros-ec-anx7688";
reg = <0x2c>;
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
anx7688_in: endpoint {
remote-endpoint = <&hdmi0_out>;
};
};
port@1 {
reg = <1>;
anx7688_out: endpoint {
remote-endpoint = <&typec_connector>;
};
};
};
};
};