Add mt8195 SoC bindings for hdmi and hdmi-ddc

On mt8195 the ddc i2c controller is part of the hdmi IP block and thus has no
specific register range, power domain or interrupt, making it simpler
than the legacy "mediatek,hdmi-ddc" binding.

Signed-off-by: Guillaume Ranquet <redacted>
---
 .../bindings/display/mediatek/mediatek,hdmi.yaml   | 59 ++++++++++++++++++----
 .../display/mediatek/mediatek,mt8195-hdmi-ddc.yaml | 45 +++++++++++++++++
 2 files changed, 93 insertions(+), 11 deletions(-)

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,hdmi.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,hdmi.yaml
index b90b6d18a828..4f62e6b94048 100644
--- a/Documentation/devicetree/bindings/display/mediatek/mediatek,hdmi.yaml
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,hdmi.yaml

@@ -21,6 +21,7 @@ properties:
       - mediatek,mt7623-hdmi
       - mediatek,mt8167-hdmi
       - mediatek,mt8173-hdmi
+      - mediatek,mt8195-hdmi
 
   reg:
     maxItems: 1

@@ -29,18 +30,10 @@ properties:
     maxItems: 1
 
   clocks:
-    items:
-      - description: Pixel Clock
-      - description: HDMI PLL
-      - description: Bit Clock
-      - description: S/PDIF Clock
+    maxItems: 4
 
   clock-names:
-    items:
-      - const: pixel
-      - const: pll
-      - const: bclk
-      - const: spdif
+    maxItems: 4
 
   phys:
     maxItems: 1

@@ -58,6 +51,9 @@ properties:
     description: |
       phandle link and register offset to the system configuration registers.
 
+  power-domains:
+    maxItems: 1
+
   ports:
     $ref: /schemas/graph.yaml#/properties/ports
 

@@ -86,9 +82,50 @@ required:
   - clock-names
   - phys
   - phy-names
-  - mediatek,syscon-hdmi
   - ports
 
+allOf:
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: mediatek,mt8195-hdmi
+    then:
+      properties:
+        clocks:
+          items:
+            - description: APB
+            - description: HDCP
+            - description: HDCP 24M
+            - description: Split HDMI
+        clock-names:
+          items:
+            - const: hdmi_apb_sel
+            - const: hdcp_sel
+            - const: hdcp24_sel
+            - const: split_hdmi
+
+      required:
+        - power-domains
+    else:
+      properties:
+        clocks:
+          items:
+            - description: Pixel Clock
+            - description: HDMI PLL
+            - description: Bit Clock
+            - description: S/PDIF Clock
+
+        clock-names:
+          items:
+            - const: pixel
+            - const: pll
+            - const: bclk
+            - const: spdif

+
+      required:
+        - mediatek,syscon-hdmi
+
 additionalProperties: false
 
 examples:

diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,mt8195-hdmi-ddc.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,mt8195-hdmi-ddc.yaml
new file mode 100644
index 000000000000..84c096835b47
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,mt8195-hdmi-ddc.yaml

@@ -0,0 +1,45 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/mediatek/mediatek,mt8195-hdmi-ddc.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mediatek HDMI DDC for mt8195
+
+maintainers:
+  - CK Hu <ck.hu@mediatek.com>
+  - Jitao shi <jitao.shi@mediatek.com>
+
+description: |
+  The HDMI DDC i2c controller is used to interface with the HDMI DDC pins.
+
+properties:
+  compatible:
+    enum:
+      - mediatek,mt8195-hdmi-ddc
+
+  clocks:
+    maxItems: 1
+
+  mediatek,hdmi:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description:
+      A phandle to the mt8195 hdmi controller
+
+required:
+  - compatible
+  - clocks
+
+additionalProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/interrupt-controller/arm-gic.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+    hdmiddc0: i2c {
+      compatible = "mediatek,mt8195-hdmi-ddc";
+      mediatek,hdmi = <&hdmi0>;
+      clocks = <&clk26m>;