dts/bindings/usb/uac2/zephyr,uac2-audio-streaming.yaml

# Copyright (c) 2023 Nordic Semiconductor ASA
# SPDX-License-Identifier: Apache-2.0

description: USB Audio Class 2 Audio Streaming interface

compatible: "zephyr,uac2-audio-streaming"

properties:
  linked-terminal:
    type: phandle
    required: true
    description: |
      Input or Output Terminal to which this interface is connected.

  active-alternate-setting-control:
    type: string
    description: Active Alternate Setting Control capabilities
    enum:
      - "read-only"

  valid-alternate-settings-control:
    type: string
    description: Valid Alternate Settings Control capabilities
    enum:
      - "read-only"

  external-interface:
    type: boolean
    description: |
      Enable if audio stream is not transmitted over USB (Type IV Audio Stream).

  implicit-feedback:
    type: boolean
    description: |
      Enable implicit feedback on asynchronous endpoint. For IN endpoints this
      sets endpoint behaviour type to implicit feedback data endpoint. For OUT
      endpoints setting this property removes explicit feedback endpoint.

  pitch-control:
    type: string
    description: Pitch Control capabilities
    enum:
      - "read-only"
      - "host-programmable"

  data-overrun-control:
    type: string
    description: Data Overrun capabilities
    enum:
      - "read-only"

  data-underrun-control:
    type: string
    description: Data Underrun capabilities
    enum:
      - "read-only"

  lock-delay:
    type: int
    description: |
      Time it takes this endpoint to reliably lock its internal clock recovery
      circuitry. Units depend on the lock-delay-units field. Relevant only if
      linked-terminal's clock is sof-synchronized.

  lock-delay-units:
    type: string
    description: Units for lock-delay parameter.
    enum:
      - "milliseconds"
      - "decoded-pcm-samples"

  subslot-size:
    type: int
    description: |
      Number of bytes occupied by one audio subslot. Can be 1, 2, 3 or 4.

  bit-resolution:
    type: int
    description: |
      Number of effectively used bits in audio subslot.