Commit a46c1125 authored Nov 30, 2020 by Tomi Valkeinen

dt-bindings: dp-connector: add binding for DisplayPort connector



Add binding for DisplayPort connector. A few notes:

* Similar to hdmi-connector, it has hpd-gpios as an optional property,
  as the HPD could also be handled by, e.g., the DP bridge.

* dp-pwr-supply, which provides 3.3V on DP_PWR pin, is optional, as it
  is not strictly required: standard DP cables do not even have the pin
  connected.

* Connector type. Full size and mini connectors are identical except for
  the connector size and form, so I believe there is no functional need
  for this property. But similar to 'label' property, it might be used
  to present information about the connector to the userspace.

* No eDP. There's really no "eDP connector", as it's always a custom
  made connection between the DP and the DP panel, although the eDP spec
  does offer a few suggested pin setups. So possibly there is no need for
  edp-connector binding, but even if there is, I don't want to guess what
  it could look like, and could it be part of the dp-connector binding.

* No DP++. I'm not familiar with DP++. DP++ might need an i2c bus added
  to the bindings.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20201130112919.241054-2-tomi.valkeinen@ti.com

parent 75c66a03

Documentation/devicetree/bindings/display/connector/dp-connector.yaml

0 → 100644

+56 −0

Original line number	Diff line number	Diff line
		# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
		%YAML 1.2
		---
		$id: http://devicetree.org/schemas/display/connector/dp-connector.yaml#
		$schema: http://devicetree.org/meta-schemas/core.yaml#

		title: DisplayPort Connector

		maintainers:
		- Tomi Valkeinen <tomi.valkeinen@ti.com>

		properties:
		compatible:
		const: dp-connector

		label: true

		type:
		enum:
		- full-size
		- mini

		hpd-gpios:
		description: A GPIO line connected to HPD
		maxItems: 1

		dp-pwr-supply:
		description: Power supply for the DP_PWR pin
		maxItems: 1

		port:
		$ref: /schemas/graph.yaml#/properties/port
		description: Connection to controller providing DP signals

		required:
		- compatible
		- type
		- port

		additionalProperties: false

		examples:
		- \|
		connector {
		compatible = "dp-connector";
		label = "dp0";
		type = "full-size";

		port {
		dp_connector_in: endpoint {
		remote-endpoint = <&dp_out>;
		};
		};
		};

		...