[PATCH v2 19/22] ASoC: dt-bindings: mt8192: Document audio-routing and dai-link subnode

From: AngeloGioacchino Del Regno
Date: Thu Mar 07 2024 - 06:50:27 EST


Document the dai-link subnodes and the audio-routing property, allowing
to describe machine specific audio hardware and links in device tree.

While at it, also deprecate the old properties which were previously
used with the driver's partially hardcoded configuration.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
---
.../sound/mt8192-mt6359-rt1015-rt5682.yaml | 124 ++++++++++++++++--
1 file changed, 115 insertions(+), 9 deletions(-)

diff --git a/Documentation/devicetree/bindings/sound/mt8192-mt6359-rt1015-rt5682.yaml b/Documentation/devicetree/bindings/sound/mt8192-mt6359-rt1015-rt5682.yaml
index 7e50f5d65c8f..449454c50dcc 100644
--- a/Documentation/devicetree/bindings/sound/mt8192-mt6359-rt1015-rt5682.yaml
+++ b/Documentation/devicetree/bindings/sound/mt8192-mt6359-rt1015-rt5682.yaml
@@ -13,6 +13,9 @@ maintainers:
description:
This binding describes the MT8192 sound card.

+allOf:
+ - $ref: sound-card-common.yaml#
+
properties:
compatible:
enum:
@@ -20,6 +23,14 @@ properties:
- mediatek,mt8192_mt6359_rt1015p_rt5682
- mediatek,mt8192_mt6359_rt1015p_rt5682s

+ audio-routing:
+ description:
+ A list of the connections between audio components. Each entry is a
+ pair of strings, the first being the connection's sink, the second
+ being the connection's source.
+ Valid names could be the input or output widgets of audio components,
+ power supplies, MicBias of codec and the software switch.
+
mediatek,platform:
$ref: /schemas/types.yaml#/definitions/phandle
description: The phandle of MT8192 ASoC platform.
@@ -27,10 +38,12 @@ properties:
mediatek,hdmi-codec:
$ref: /schemas/types.yaml#/definitions/phandle
description: The phandle of HDMI codec.
+ deprecated: true

headset-codec:
type: object
additionalProperties: false
+ deprecated: true

properties:
sound-dai:
@@ -41,6 +54,7 @@ properties:
speaker-codecs:
type: object
additionalProperties: false
+ deprecated: true

properties:
sound-dai:
@@ -51,33 +65,125 @@ properties:
required:
- sound-dai

+patternProperties:
+ ".*-dai-link$":
+ type: object
+ additionalProperties: false
+
+ description:
+ Container for dai-link level properties and CODEC sub-nodes.
+
+ properties:
+ link-name:
+ description: Indicates dai-link name and PCM stream name
+ enum:
+ - I2S0
+ - I2S1
+ - I2S2
+ - I2S3
+ - I2S4
+ - I2S5
+ - I2S6
+ - I2S7
+ - I2S8
+ - I2S9
+ - TDM
+
+ codec:
+ description: Holds subnode which indicates codec dai.
+ type: object
+ additionalProperties: false
+ properties:
+ sound-dai:
+ minItems: 1
+ maxItems: 2
+ required:
+ - sound-dai
+
+ dai-format:
+ description: audio format
+ enum: [ i2s, right_j, left_j, dsp_a, dsp_b ]
+
+ mediatek,clk-provider:
+ $ref: /schemas/types.yaml#/definitions/string
+ description: Indicates dai-link clock master.
+ enum: [ cpu, codec ]
+
+ required:
+ - link-name
+
additionalProperties: false

required:
- compatible
- mediatek,platform
- - headset-codec
- - speaker-codecs
+
+# Disallow legacy properties if xxx-dai-link nodes are specified
+if:
+ not:
+ patternProperties:
+ ".*-dai-link$": false
+then:
+ properties:
+ headset-codec: false
+ speaker-codecs: false
+ mediatek,hdmi-codec: false
+else:
+ required:
+ - headset-codec
+ - speaker-codecs

examples:
- |

sound: mt8192-sound {
compatible = "mediatek,mt8192_mt6359_rt1015_rt5682";
- mediatek,platform = <&afe>;
- mediatek,hdmi-codec = <&anx_bridge_dp>;
+ model = "mt8192_mt6359_rt1015_rt5682";
pinctrl-names = "aud_clk_mosi_off",
"aud_clk_mosi_on";
pinctrl-0 = <&aud_clk_mosi_off>;
pinctrl-1 = <&aud_clk_mosi_on>;
+ mediatek,platform = <&afe>;
+
+ audio-routing =
+ "Headphone Jack", "HPOL",
+ "Headphone Jack", "HPOR",
+ "IN1P", "Headset Mic",
+ "Speakers", "Speaker";
+
+ spk-playback-dai-link {
+ link-name = "I2S3";
+ dai-format = "i2s";
+ mediatek,clk-provider = "cpu";
+ codec {
+ sound-dai = <&rt1015p>;
+ };
+ };
+
+ hs-playback-dai-link {
+ link-name = "I2S8";
+ dai-format = "i2s";
+ mediatek,clk-provider = "cpu";
+ codec {
+ sound-dai = <&rt5682 0>;
+ };
+ };

- headset-codec {
- sound-dai = <&rt5682>;
+ hs-capture-dai-link {
+ link-name = "I2S9";
+ dai-format = "i2s";
+ mediatek,clk-provider = "cpu";
+ codec {
+ sound-dai = <&rt5682 0>;
+ };
};

- speaker-codecs {
- sound-dai = <&rt1015_l>,
- <&rt1015_r>;
+ displayport-dai-link {
+ link-name = "TDM";
+ dai-format = "dsp_a";
+ codec {
+ sound-dai = <&anx_bridge_dp>;
+ };
};
};

--
2.44.0