[PATCH v2 18/22] ASoC: dt-bindings: mt8195: Document audio-routing and dai-link subnode

[AngeloGioacchino Del Regno]

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 driver hardcoded configuration.

Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
---
 .../bindings/sound/mt8195-mt6359.yaml         | 115 ++++++++++++++++++
 1 file changed, 115 insertions(+)

diff --git a/Documentation/devicetree/bindings/sound/mt8195-mt6359.yaml b/Documentation/devicetree/bindings/sound/mt8195-mt6359.yaml
index c1ddbf672ca3..dfd6e61935ab 100644
--- a/Documentation/devicetree/bindings/sound/mt8195-mt6359.yaml
+++ b/Documentation/devicetree/bindings/sound/mt8195-mt6359.yaml
@@ -12,6 +12,9 @@ maintainers:
 description:
   This binding describes the MT8195 sound card.
 
+allOf:
+  - $ref: sound-card-common.yaml#
+
 properties:
   compatible:
     enum:
@@ -23,6 +26,14 @@ properties:
     $ref: /schemas/types.yaml#/definitions/string
     description: User specified audio sound card name
 
+  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 MT8195 ASoC platform.
@@ -30,10 +41,12 @@ properties:
   mediatek,dptx-codec:
     $ref: /schemas/types.yaml#/definitions/phandle
     description: The phandle of MT8195 Display Port Tx codec node.
+    deprecated: true
 
   mediatek,hdmi-codec:
     $ref: /schemas/types.yaml#/definitions/phandle
     description: The phandle of MT8195 HDMI codec node.
+    deprecated: true
 
   mediatek,adsp:
     $ref: /schemas/types.yaml#/definitions/phandle
@@ -45,20 +58,122 @@ properties:
       A list of the desired dai-links in the sound card. Each entry is a
       name defined in the machine driver.
 
+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:
+          - DPTX_BE
+          - ETDM1_IN_BE
+          - ETDM2_IN_BE
+          - ETDM1_OUT_BE
+          - ETDM2_OUT_BE
+          - ETDM3_OUT_BE
+          - PCM1_BE
+
+      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
 
+# Disallow legacy properties if xxx-dai-link nodes are specified
+if:
+  not:
+    patternProperties:
+      ".*-dai-link$": false
+then:
+  properties:
+    mediatek,dptx-codec: false
+    mediatek,hdmi-codec: false
+
 examples:
   - |
 
     sound: mt8195-sound {
         compatible = "mediatek,mt8195_mt6359_rt1019_rt5682";
+        model = "mt8195_r1019_5682";
         mediatek,platform = <&afe>;
         pinctrl-names = "default";
         pinctrl-0 = <&aud_pins_default>;
+
+        audio-routing =
+                "Headphone", "HPOL",
+                "Headphone", "HPOR",
+                "IN1P", "Headset Mic",
+                "Ext Spk", "Speaker";
+
+        mm-dai-link {
+                link-name = "ETDM1_IN_BE";
+                mediatek,clk-provider = "cpu";
+        };
+
+        hs-playback-dai-link {
+                link-name = "ETDM1_OUT_BE";
+                mediatek,clk-provider = "cpu";
+                codec {
+                        sound-dai = <&headset_codec>;
+                };
+        };
+
+        hs-capture-dai-link {
+                link-name = "ETDM2_IN_BE";
+                mediatek,clk-provider = "cpu";
+                codec {
+                        sound-dai = <&headset_codec>;
+                };
+        };
+
+        spk-playback-dai-link {
+                link-name = "ETDM2_OUT_BE";
+                mediatek,clk-provider = "cpu";
+                codec {
+                        sound-dai = <&spk_amplifier>;
+                };
+        };
+
+        hdmi-dai-link {
+                link-name = "ETDM3_OUT_BE";
+                codec {
+                        sound-dai = <&hdmi_tx>;
+                };
+        };
+
+        displayport-dai-link {
+                link-name = "DPTX_BE";
+                codec {
+                        sound-dai = <&dp_tx>;
+                };
+        };
     };
 
 ...
-- 
2.44.0