xref: /kernel/linux/linux-5.10/Documentation/devicetree/bindings/display/brcm,bcm2835-hdmi.yaml

# SPDX-License-Identifier: GPL-2.0
%YAML 1.2
---
$id: http://devicetree.org/schemas/display/brcm,bcm2835-hdmi.yaml#
$schema: http://devicetree.org/meta-schemas/core.yaml#

title: Broadcom VC4 (VideoCore4) HDMI Controller

maintainers:
  - Eric Anholt <eric@anholt.net>

properties:
  compatible:
    const: brcm,bcm2835-hdmi

  reg:
    items:
      - description: HDMI register range
      - description: HD register range

  interrupts:
    minItems: 2

  clocks:
    items:
      - description: The pixel clock
      - description: The HDMI state machine clock

  clock-names:
    items:
      - const: pixel
      - const: hdmi

  ddc:
    $ref: /schemas/types.yaml#/definitions/phandle
    description: >
      Phandle of the I2C controller used for DDC EDID probing

  hpd-gpios:
    description: >
      The GPIO pin for the HDMI hotplug detect (if it doesn't appear
      as an interrupt/status bit in the HDMI controller itself)

  dmas:
    maxItems: 1
    description: >
      Should contain one entry pointing to the DMA channel used to
      transfer audio data.

  dma-names:
    const: audio-rx

required:
  - compatible
  - reg
  - interrupts
  - clocks
  - ddc

additionalProperties: false

examples:
  - |
    #include <dt-bindings/clock/bcm2835.h>
    #include <dt-bindings/gpio/gpio.h>

    hdmi: hdmi@7e902000 {
        compatible = "brcm,bcm2835-hdmi";
        reg = <0x7e902000 0x600>,
              <0x7e808000 0x100>;
        interrupts = <2 8>, <2 9>;
        ddc = <&i2c2>;
        hpd-gpios = <&gpio 46 GPIO_ACTIVE_HIGH>;
        clocks = <&clocks BCM2835_PLLH_PIX>,
                 <&clocks BCM2835_CLOCK_HSM>;
        clock-names = "pixel", "hdmi";
    };

...