ASoC: dt-bindings: mt8192: Document audio-routing and dai-link subnode

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.

Also, since describing machine specific audio hardware and links replaces
the now deprecated old logic doing the same in a driver hardcoded fashion,
it is not allowed to have both the old and new properties together.

Reviewed-by: Rob Herring <robh@kernel.org>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20240416071410.75620-16-angelogioacchino.delregno@collabora.com
Signed-off-by: Mark Brown <broonie@kernel.org>

Author: AngeloGioacchino Del Regno

Documentation/devicetree/bindings/sound/mt8192-mt6359-rt1015-rt5682.yaml

@@ -13,24 +13,54 @@ maintainers:
 description:
   This binding describes the MT8192 sound card.
 
+allOf:
+  - $ref: sound-card-common.yaml#
+
 properties:
   compatible:
     enum:
       - mediatek,mt8192_mt6359_rt1015_rt5682
       - 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.
+    minItems: 2
+    items:
+      enum:
+        # Sinks
+        - Speakers
+        - Headphone Jack
+        - IN1P
+        - Left Spk
+        - Right Spk
+
+        # Sources
+        - Headset Mic
+        - HPOL
+        - HPOR
+        - Left SPO
+        - Right SPO
+        - Speaker
+
   mediatek,platform:
     $ref: /schemas/types.yaml#/definitions/phandle
     description: The phandle of MT8192 ASoC platform.
 
   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 +71,7 @@ properties:
   speaker-codecs:
     type: object
     additionalProperties: false
+    deprecated: true
 
     properties:
       sound-dai:
@@ -51,33 +82,121 @@ properties:
     required:
       - sound-dai
 
-additionalProperties: false
+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
+
+unevaluatedProperties: 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
 
 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>;
+                };
         };
     };