xref: /openbmc/linux/Documentation/devicetree/bindings/display/panel/display-timings.yaml (revision 7ae9fb1b7ecbb5d85d07857943f677fd1a559b18)

# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
%YAML 1.2
---
$id: http://devicetree.org/schemas/display/panel/display-timings.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: display timings

maintainers:
  - Thierry Reding <thierry.reding@gmail.com>
  - Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>
  - Sam Ravnborg <sam@ravnborg.org>

description: |
  A display panel may be able to handle several display timings,
  with different resolutions.
  The display-timings node makes it possible to specify the timings
  and to specify the timing that is native for the display.

properties:
  $nodename:
    const: display-timings

  native-mode:
    $ref: /schemas/types.yaml#/definitions/phandle
    description: |
      The default display timing is the one specified as native-mode.
      If no native-mode is specified then the first node is assumed
      to be the native mode.

patternProperties:
  "^timing":
    type: object
    $ref: panel-timing.yaml#

additionalProperties: false

examples:
  - |+

    /*
     * Example that specifies panel timing using minimum, typical,
     * maximum values as commonly used in datasheet description.
     * timing1 is the native-mode.
     */
    display-timings {
        native-mode = <&timing1>;
        timing0 {
            /* 1920x1080p24 */
            clock-frequency = <148500000>;
            hactive = <1920>;
            vactive = <1080>;
            hsync-len = <0 44 60>;
            hfront-porch = <80 88 95>;
            hback-porch = <100 148 160>;
            vfront-porch = <0 4 6>;
            vback-porch = <0 36 50>;
            vsync-len = <0 5 6>;
        };
        timing1 {
            /* 1920x1080p24 */
            clock-frequency = <52000000>;
            hactive = <1920>;
            vactive = <1080>;
            hfront-porch = <25>;
            hback-porch = <25>;
            hsync-len = <0 25 25>;
            vback-porch = <2>;
            vfront-porch = <2>;
            vsync-len = <2>;
            hsync-active = <1>;
            pixelclk-active = <1>;
        };
    };

...