mirror of
https://git.kernel.org/pub/scm/linux/kernel/git/chenhuacai/linux-loongson
synced 2025-09-02 08:32:55 +00:00
597acf1a04
Make 'dais' property to be optional. When there is no 'dais' property, driver won't register the card, dts should have audio graph card node for linking this device. Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://patch.msgid.link/20250226100508.2352568-4-shengjiu.wang@nxp.com Signed-off-by: Mark Brown <broonie@kernel.org>
143 lines
3.8 KiB
YAML
143 lines
3.8 KiB
YAML
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/sound/fsl,audmix.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: NXP Audio Mixer (AUDMIX).
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maintainers:
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- Shengjiu Wang <shengjiu.wang@nxp.com>
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- Frank Li <Frank.Li@nxp.com>
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description: |
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The Audio Mixer is a on-chip functional module that allows mixing of two
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audio streams into a single audio stream. Audio Mixer has two input serial
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audio interfaces. These are driven by two Synchronous Audio interface
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modules (SAI). Each input serial interface carries 8 audio channels in its
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frame in TDM manner. Mixer mixes audio samples of corresponding channels
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from two interfaces into a single sample. Before mixing, audio samples of
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two inputs can be attenuated based on configuration. The output of the
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Audio Mixer is also a serial audio interface. Like input interfaces it has
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the same TDM frame format. This output is used to drive the serial DAC TDM
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interface of audio codec and also sent to the external pins along with the
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receive path of normal audio SAI module for readback by the CPU.
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The output of Audio Mixer can be selected from any of the three streams
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- serial audio input 1
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- serial audio input 2
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- mixed audio
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Mixing operation is independent of audio sample rate but the two audio
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input streams must have same audio sample rate with same number of channels
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in TDM frame to be eligible for mixing.
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properties:
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compatible:
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const: fsl,imx8qm-audmix
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reg:
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maxItems: 1
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clocks:
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maxItems: 1
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clock-names:
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items:
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- const: ipg
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power-domains:
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maxItems: 1
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dais:
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description: contain a list of phandles to AUDMIX connected DAIs.
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$ref: /schemas/types.yaml#/definitions/phandle-array
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minItems: 2
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items:
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- description: the AUDMIX output
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maxItems: 1
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- description: serial audio input 1
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maxItems: 1
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- description: serial audio input 2
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maxItems: 1
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ports:
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$ref: /schemas/graph.yaml#/properties/ports
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patternProperties:
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'^port@[0-1]':
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$ref: audio-graph-port.yaml#
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unevaluatedProperties: false
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description: Input port from SAI TX
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properties:
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port@2:
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$ref: audio-graph-port.yaml#
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unevaluatedProperties: false
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description: Output port to SAI RX
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required:
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- compatible
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- reg
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- clocks
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- clock-names
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- power-domains
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unevaluatedProperties: false
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examples:
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- |
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audmix@59840000 {
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compatible = "fsl,imx8qm-audmix";
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reg = <0x59840000 0x10000>;
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clocks = <&amix_lpcg 0>;
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clock-names = "ipg";
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power-domains = <&pd_audmix>;
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dais = <&sai4>, <&sai5>;
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ports {
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#address-cells = <1>;
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#size-cells = <0>;
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port@0 {
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reg = <0>;
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playback-only;
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amix_endpoint0: endpoint {
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dai-tdm-slot-num = <8>;
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dai-tdm-slot-width = <32>;
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dai-tdm-slot-width-map = <32 8 32>;
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dai-format = "dsp_a";
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remote-endpoint = <&be00_ep>;
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};
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};
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port@1 {
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reg = <1>;
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playback-only;
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amix_endpoint1: endpoint {
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dai-tdm-slot-num = <8>;
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dai-tdm-slot-width = <32>;
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dai-tdm-slot-width-map = <32 8 32>;
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dai-format = "dsp_a";
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remote-endpoint = <&be01_ep>;
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};
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};
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port@2 {
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reg = <2>;
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capture-only;
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amix_endpoint2: endpoint {
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dai-tdm-slot-num = <8>;
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dai-tdm-slot-width = <32>;
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dai-tdm-slot-width-map = <32 8 32>;
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dai-format = "dsp_a";
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bitclock-master;
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frame-master;
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remote-endpoint = <&be02_ep>;
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};
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};
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};
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};
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