1feac44baSDouglas Anderson# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) 2feac44baSDouglas Anderson%YAML 1.2 3feac44baSDouglas Anderson--- 4feac44baSDouglas Anderson$id: http://devicetree.org/schemas/display/dp-aux-bus.yaml# 5feac44baSDouglas Anderson$schema: http://devicetree.org/meta-schemas/core.yaml# 6feac44baSDouglas Anderson 7feac44baSDouglas Andersontitle: DisplayPort AUX bus 8feac44baSDouglas Anderson 9feac44baSDouglas Andersonmaintainers: 10feac44baSDouglas Anderson - Douglas Anderson <dianders@chromium.org> 11feac44baSDouglas Anderson 12feac44baSDouglas Andersondescription: 13feac44baSDouglas Anderson DisplayPort controllers provide a control channel to the sinks that 14feac44baSDouglas Anderson are hooked up to them. This is the DP AUX bus. Over the DP AUX bus 15feac44baSDouglas Anderson we can query properties about a sink and also configure it. In 16feac44baSDouglas Anderson particular, DP sinks support DDC over DP AUX which allows tunneling 17feac44baSDouglas Anderson a standard I2C DDC connection over the AUX channel. 18feac44baSDouglas Anderson 19feac44baSDouglas Anderson To model this relationship, DP sinks should be placed as children 20feac44baSDouglas Anderson of the DP controller under the "aux-bus" node. 21feac44baSDouglas Anderson 22feac44baSDouglas Anderson At the moment, this binding only handles the eDP case. It is 23feac44baSDouglas Anderson possible it will be extended in the future to handle the DP case. 24feac44baSDouglas Anderson For DP, presumably a connector would be listed under the DP AUX 25feac44baSDouglas Anderson bus instead of a panel. 26feac44baSDouglas Anderson 27feac44baSDouglas Andersonproperties: 28feac44baSDouglas Anderson $nodename: 29*4334aec0SRob Herring const: aux-bus 30feac44baSDouglas Anderson 31feac44baSDouglas Anderson panel: 32feac44baSDouglas Anderson $ref: panel/panel-common.yaml# 33feac44baSDouglas Anderson 34feac44baSDouglas AndersonadditionalProperties: false 35feac44baSDouglas Anderson 36feac44baSDouglas Andersonrequired: 37feac44baSDouglas Anderson - panel 38