| Tom Rini | 53633a8 | 2024-02-29 12:33:36 -0500 | [diff] [blame] | 1 | # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) |
| 2 | %YAML 1.2 |
| 3 | --- |
| 4 | $id: http://devicetree.org/schemas/display/dp-aux-bus.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: DisplayPort AUX bus |
| 8 | |
| 9 | maintainers: |
| 10 | - Douglas Anderson <dianders@chromium.org> |
| 11 | |
| 12 | description: |
| 13 | DisplayPort controllers provide a control channel to the sinks that |
| 14 | are hooked up to them. This is the DP AUX bus. Over the DP AUX bus |
| 15 | we can query properties about a sink and also configure it. In |
| 16 | particular, DP sinks support DDC over DP AUX which allows tunneling |
| 17 | a standard I2C DDC connection over the AUX channel. |
| 18 | |
| 19 | To model this relationship, DP sinks should be placed as children |
| 20 | of the DP controller under the "aux-bus" node. |
| 21 | |
| 22 | At the moment, this binding only handles the eDP case. It is |
| 23 | possible it will be extended in the future to handle the DP case. |
| 24 | For DP, presumably a connector would be listed under the DP AUX |
| 25 | bus instead of a panel. |
| 26 | |
| 27 | properties: |
| 28 | $nodename: |
| 29 | const: aux-bus |
| 30 | |
| 31 | panel: |
| 32 | $ref: panel/panel-common.yaml# |
| 33 | |
| 34 | additionalProperties: false |
| 35 | |
| 36 | required: |
| 37 | - panel |