| 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/sound/nvidia,tegra186-asrc.yaml# |
| 5 | $schema: http://devicetree.org/meta-schemas/core.yaml# |
| 6 | |
| 7 | title: Tegra186 ASRC |
| 8 | |
| 9 | description: | |
| 10 | Asynchronous Sample Rate Converter (ASRC) converts the sampling frequency |
| 11 | of the input signal from one frequency to another. It can handle over a |
| 12 | wide range of sample rate ratios (freq_in/freq_out) from 1:24 to 24:1. |
| 13 | ASRC has two modes of operation. One where ratio can be programmed in SW |
| 14 | and the other where it gets the information from ratio estimator module. |
| 15 | |
| 16 | It supports sample rate conversions in the range of 8 to 192 kHz and |
| 17 | supports 6 streams upto 12 total channels. The input data size can be |
| 18 | 16, 24 and 32 bits. |
| 19 | |
| 20 | maintainers: |
| 21 | - Jon Hunter <jonathanh@nvidia.com> |
| 22 | - Mohan Kumar <mkumard@nvidia.com> |
| 23 | - Sameer Pujar <spujar@nvidia.com> |
| 24 | |
| 25 | allOf: |
| 26 | - $ref: dai-common.yaml# |
| 27 | |
| 28 | properties: |
| 29 | $nodename: |
| 30 | pattern: "^asrc@[0-9a-f]*$" |
| 31 | |
| 32 | compatible: |
| 33 | oneOf: |
| 34 | - const: nvidia,tegra186-asrc |
| 35 | - items: |
| 36 | - enum: |
| 37 | - nvidia,tegra234-asrc |
| 38 | - nvidia,tegra194-asrc |
| 39 | - const: nvidia,tegra186-asrc |
| 40 | |
| 41 | reg: |
| 42 | maxItems: 1 |
| 43 | |
| 44 | sound-name-prefix: |
| 45 | pattern: "^ASRC[1-9]$" |
| 46 | |
| 47 | ports: |
| 48 | $ref: /schemas/graph.yaml#/properties/ports |
| 49 | description: | |
| 50 | ASRC has seven input ports and six output ports. Accordingly ACIF |
| 51 | (Audio Client Interfaces) port nodes are defined to represent the |
| 52 | ASRC inputs (port 0 to 6) and outputs (port 7 to 12). These are |
| 53 | connected to corresponding ports on AHUB (Audio Hub). Additional |
| 54 | input (port 6) is for receiving ratio information from estimator. |
| 55 | |
| 56 | patternProperties: |
| 57 | '^port@[0-6]': |
| 58 | $ref: audio-graph-port.yaml# |
| 59 | unevaluatedProperties: false |
| 60 | description: ASRC ACIF input ports |
| 61 | '^port@[7-9]|1[1-2]': |
| 62 | $ref: audio-graph-port.yaml# |
| 63 | unevaluatedProperties: false |
| 64 | description: ASRC ACIF output ports |
| 65 | |
| 66 | required: |
| 67 | - compatible |
| 68 | - reg |
| 69 | |
| 70 | additionalProperties: false |
| 71 | |
| 72 | examples: |
| 73 | - | |
| 74 | |
| 75 | asrc@2910000 { |
| 76 | compatible = "nvidia,tegra186-asrc"; |
| 77 | reg = <0x2910000 0x2000>; |
| 78 | sound-name-prefix = "ASRC1"; |
| 79 | }; |
| 80 | |
| 81 | ... |