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The QMC audio uses one QMC channel per DAI and uses this QMC channel to transmit interleaved audio channel samples. In order to work in non-interleave mode, a QMC audio DAI needs to use multiple QMC channels. In that case, the DAI maps each QMC channel to exactly one audio channel. Allow QMC audio DAIs with multiple QMC channels attached. Signed-off-by: Herve Codina <herve.codina@bootlin.com> Reviewed-by: Rob Herring (Arm) <robh@kernel.org> Link: https://patch.msgid.link/20240701113038.55144-10-herve.codina@bootlin.com Signed-off-by: Mark Brown <broonie@kernel.org>
147 lines
4.1 KiB
YAML
147 lines
4.1 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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$id: http://devicetree.org/schemas/sound/fsl,qmc-audio.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: QMC audio
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maintainers:
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- Herve Codina <herve.codina@bootlin.com>
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description: |
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The QMC audio is an ASoC component which uses QMC (QUICC Multichannel
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Controller) channels to transfer the audio data.
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It provides several DAIs. For each DAI, the DAI is working in interleaved mode
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if only one QMC channel is used by the DAI or it is working in non-interleaved
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mode if several QMC channels are used by the DAI.
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allOf:
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- $ref: dai-common.yaml#
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properties:
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compatible:
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const: fsl,qmc-audio
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'#address-cells':
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const: 1
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'#size-cells':
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const: 0
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'#sound-dai-cells':
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const: 1
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patternProperties:
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'^dai@([0-9]|[1-5][0-9]|6[0-3])$':
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description:
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A DAI managed by this controller
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type: object
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additionalProperties: false
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properties:
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reg:
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minimum: 0
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maximum: 63
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description:
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The DAI number
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fsl,qmc-chan:
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$ref: /schemas/types.yaml#/definitions/phandle-array
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items:
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items:
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- description: phandle to QMC node
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- description: Channel number
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minItems: 1
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description:
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Should be a phandle/number pair list. The list of phandle to QMC node
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and the QMC channel pair to use for this DAI.
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If only one phandle/number pair is provided, this DAI works in
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interleaved mode, i.e. audio channels for this DAI are interleaved in
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the QMC channel. If more than one pair is provided, this DAI works
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in non-interleave mode. In that case the first audio channel uses the
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the first QMC channel, the second audio channel uses the second QMC
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channel, etc...
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required:
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- reg
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- fsl,qmc-chan
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required:
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- compatible
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- '#address-cells'
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- '#size-cells'
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- '#sound-dai-cells'
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additionalProperties: false
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examples:
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- |
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audio_controller: audio-controller {
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compatible = "fsl,qmc-audio";
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#address-cells = <1>;
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#size-cells = <0>;
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#sound-dai-cells = <1>;
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dai@16 {
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reg = <16>;
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fsl,qmc-chan = <&qmc 16>;
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};
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dai@17 {
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reg = <17>;
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fsl,qmc-chan = <&qmc 17>;
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};
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dai@18 {
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reg = <18>;
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/* Non-interleaved mode */
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fsl,qmc-chan = <&qmc 18>, <&qmc 19>;
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};
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};
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sound {
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compatible = "simple-audio-card";
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#address-cells = <1>;
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#size-cells = <0>;
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simple-audio-card,dai-link@0 {
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reg = <0>;
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format = "dsp_b";
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cpu {
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sound-dai = <&audio_controller 16>;
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};
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codec {
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sound-dai = <&codec1>;
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dai-tdm-slot-num = <4>;
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dai-tdm-slot-width = <8>;
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/* TS 3, 5, 7, 9 */
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dai-tdm-slot-tx-mask = <0 0 0 1 0 1 0 1 0 1>;
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dai-tdm-slot-rx-mask = <0 0 0 1 0 1 0 1 0 1>;
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};
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};
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simple-audio-card,dai-link@1 {
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reg = <1>;
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format = "dsp_b";
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cpu {
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sound-dai = <&audio_controller 17>;
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};
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codec {
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sound-dai = <&codec2>;
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dai-tdm-slot-num = <4>;
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dai-tdm-slot-width = <8>;
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/* TS 2, 4, 6, 8 */
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dai-tdm-slot-tx-mask = <0 0 1 0 1 0 1 0 1>;
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dai-tdm-slot-rx-mask = <0 0 1 0 1 0 1 0 1>;
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};
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};
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simple-audio-card,dai-link@2 {
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reg = <2>;
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format = "dsp_b";
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cpu {
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sound-dai = <&audio_controller 18>;
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};
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codec {
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sound-dai = <&codec3>;
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dai-tdm-slot-num = <2>;
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dai-tdm-slot-width = <8>;
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/* TS 9, 10 */
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dai-tdm-slot-tx-mask = <0 0 0 0 0 0 0 0 0 1 1>;
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dai-tdm-slot-rx-mask = <0 0 0 0 0 0 0 0 0 1 1>;
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};
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};
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};
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