dts/bindings/display/panel/panel-timing.yaml

# Copyright 2023 NXP
# SPDX-License-Identifier: Apache-2.0

# Common fields for panel timings
# inherited from Linux panel bindings.

description: |
  Common timing settings for display panels. These timings can be added to
  a panel under display-timings node. For example:

  &lcdif {
    display-timings {
      compatible = "zephyr,panel-timing";
      hsync-len = <8>;
      hfront-porch = <32>;
      hback-porch = <32>;
      vsync-len = <2>;
      vfront-porch = <16>;
      vback-porch = <14>;
      hsync-active = <0>;
      vsync-active = <0>;
      de-active = <1>;
      pixelclk-active = <0>;
      clock-frequency = <62346240>;
    };
  };

compatible: "zephyr,panel-timing"

properties:
  clock-frequency:
    type: int
    description: |
      Pixel clock for display controller in Hz. Must be at least as large as:
      (height + vsync-len + vfront-porch + vback-porch) *
      (width + hsync-len + hfront-porch + hback-porch) *
      desired frame rate

  hsync-len:
    type: int
    required: true
    description: |
      Horizontal synchronization pulse duration of panel driven by this
      controller, in pixels

  vsync-len:
    type: int
    required: true
    description: |
      Vertical synchronization pulse duration of panel driven by this
      controller, in lines

  hback-porch:
    type: int
    required: true
    description: |
      Horizontal back porch duration of panel driven by this controller,
      in pixels

  vback-porch:
    type: int
    required: true
    description: |
      Vertical back porch duration of panel driven by this controller, in lines

  hfront-porch:
    type: int
    required: true
    description: |
      Horizontal front porch duration of panel driven by this controller,
      in pixels

  vfront-porch:
    type: int
    required: true
    description: |
      Vertical front porch duration of panel driven by this controller, in lines

  hsync-active:
    type: int
    required: true
    enum:
      - 0
      - 1
    description: |
      Polarity of horizontal sync pulse
      0 selects active low
      1 selects active high

  vsync-active:
    type: int
    required: true
    enum:
      - 0
      - 1
    description: |
      Polarity of vertical sync pulse
      0 selects active low
      1 selects active high

  de-active:
    type: int
    required: true
    enum:
      - 0
      - 1
    description: |
      Polarity of data enable, sent with each horizontal interval.
      0 selects active low
      1 selects active high.

  pixelclk-active:
    type: int
    required: true
    enum:
      - 0
      - 1
    description: |
      Polarity of pixel clock. Selects which edge to drive data to display on.
      0 drives pixel data on falling edge, and samples on rising edge.
      1 drives pixel data on rising edge, and samples data on falling edge

  syncclk-active:
    type: int
    enum:
      - 0
      - 1
    description: |
      Drive sync on rising or sample sync on falling edge. If not specified
      then the controller uses the setup specified by pixelclk-active.
      Use 0 to drive sync on falling edge
      and sample sync on rising edge of pixel clock.
      Use 1 to drive sync on rising edge
      and sample sync on falling edge of pixel clock.