[PATCH 2/9] dt-bindings: sound: add mediatek,mt2701-hdmi-audio machine binding

Daniel Golle
2026-04-15T15:23:44Z

Describe the ASoC machine compatible used to wire the MT2701/MT7623N
AFE HDMI playback path to the on-chip HDMI transmitter acting as the
generic HDMI audio codec. MT7623N boards carry the same IP and use
the mt7623n- compatible as a fallback to mt2701-.

Signed-off-by: Daniel Golle <daniel@makrotopia.org>
---
.../sound/mediatek,mt2701-hdmi-audio.yaml | 47 +++++++++++++++++++
1 file changed, 47 insertions(+)
create mode 100644 Documentation/devicetree/bindings/sound/mediatek,mt2701-hdmi-audio.yaml

diff --git a/Documentation/devicetree/bindings/sound/mediatek,mt2701-hdmi-audio.yaml b/Documentation/devicetree/bindings/sound/mediatek,mt2701-hdmi-audio.yaml
new file mode 100644
index 0000000000000..d08aee447b471
--- /dev/null
+++ b/Documentation/devicetree/bindings/sound/mediatek,mt2701-hdmi-audio.yaml
@@ -0,0 +1,47 @@
+# 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 HDMI audio machine driver
+
+maintainers:
+ - Daniel Golle <daniel@makrotopia.org>
+
+description:
+ ASoC machine driver binding the MT2701 AFE HDMI playback path to
+ the on-chip HDMI transmitter via the generic HDMI audio codec.
+ The same HDMI audio IP is present on MT7623N.
+
+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>;
+ };
--
2.53.0