diff --git a/Documentation/devicetree/bindings/sound/mediatek,mt2701-hdmi-audio.yaml b/Documentation/devicetree/bindings/sound/mediatek,mt2701-hdmi-audio.yaml
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/sound/mediatek,mt2701-hdmi-audio.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek MT2701/MT7623N HDMI audio output
+
+maintainers:
+  - Daniel Golle <daniel@makrotopia.org>
+
+description:
+  Sound card routing the MT2701/MT7623N Audio Front End HDMI
+  playback path to the on-chip HDMI transmitter. The AFE
+  provides the DMA memif and internal I2S engine; the HDMI
+  transmitter acts as the audio codec on the serialised link.
+
+properties:
+  compatible:
+    oneOf:
+      - const: mediatek,mt2701-hdmi-audio
+      - items:
+          - const: mediatek,mt7623n-hdmi-audio
+          - const: mediatek,mt2701-hdmi-audio
+
+  mediatek,platform:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: Phandle of the MT2701/MT7623N AFE platform node.
+
+  mediatek,audio-codec:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: Phandle of the HDMI transmitter acting as audio codec.
+
+required:
+  - compatible
+  - mediatek,platform
+  - mediatek,audio-codec
+
+additionalProperties: false
+
+examples:
+  - |
+    sound-hdmi {
+        compatible = "mediatek,mt7623n-hdmi-audio",
+                     "mediatek,mt2701-hdmi-audio";
+        mediatek,platform = <&afe>;
+        mediatek,audio-codec = <&hdmi0>;
+    };