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diff --git a/Documentation/devicetree/bindings/phy/mediatek,hdmi-phy.yaml b/Documentation/devicetree/bindings/phy/mediatek,hdmi-phy.yaml
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+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+# Copyright (c) 2020 MediaTek
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/mediatek,hdmi-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: MediaTek High Definition Multimedia Interface (HDMI) PHY binding
+
+maintainers:
+  - Chun-Kuang Hu <chunkuang.hu@kernel.org>
+  - Philipp Zabel <p.zabel@pengutronix.de>
+  - Chunfeng Yun <chunfeng.yun@mediatek.com>
+
+description: |
+  The HDMI PHY serializes the HDMI encoder's three channel 10-bit parallel
+  output and drives the HDMI pads.
+
+properties:
+  $nodename:
+    pattern: "^hdmi-phy@[0-9a-f]+$"
+
+  compatible:
+    oneOf:
+      - items:
+          - enum:
+              - mediatek,mt7623-hdmi-phy
+          - const: mediatek,mt2701-hdmi-phy
+      - const: mediatek,mt2701-hdmi-phy
+      - const: mediatek,mt8173-hdmi-phy
+
+  reg:
+    maxItems: 1
+
+  clocks:
+    items:
+      - description: PLL reference clock
+
+  clock-names:
+    items:
+      - const: pll_ref
+
+  clock-output-names:
+    items:
+      - const: hdmitx_dig_cts
+
+  "#phy-cells":
+    const: 0
+
+  "#clock-cells":
+    const: 0
+
+  mediatek,ibias:
+    description:
+      TX DRV bias current for < 1.65Gbps
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 63
+    default: 0xa
+
+  mediatek,ibias_up:
+    description:
+      TX DRV bias current for >= 1.65Gbps
+    $ref: /schemas/types.yaml#/definitions/uint32
+    minimum: 0
+    maximum: 63
+    default: 0x1c
+
+required:
+  - compatible
+  - reg
+  - clocks
+  - clock-names
+  - clock-output-names
+  - "#phy-cells"
+  - "#clock-cells"
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/mt8173-clk.h>
+    hdmi_phy: hdmi-phy@10209100 {
+        compatible = "mediatek,mt8173-hdmi-phy";
+        reg = <0x10209100 0x24>;
+        clocks = <&apmixedsys CLK_APMIXED_HDMI_REF>;
+        clock-names = "pll_ref";
+        clock-output-names = "hdmitx_dig_cts";
+        mediatek,ibias = <0xa>;
+        mediatek,ibias_up = <0x1c>;
+        #clock-cells = <0>;
+        #phy-cells = <0>;
+    };
+
+...