[PATCH v9 1/2] dt-bindings: display: Add ITE IT61620 MIPI DSI to HDMI bridge

[Pet Weng]

This chip receives MIPI DSI input and outputs HDMI, and is commonly
connected to SoCs via I2C and DSI.

IT61620 is a variant of IT6162.
The main differences are listed below
- IT61620 supports only a single MIPI DSI input port, while
  IT6162 supports dual MIPI DSI ports.
- IT61620 does not include the internal MCU present in IT6162.

Because of these architectural differences, IT61620 uses a separate
compatible string even though the external interfaces and bindings
are largely similar.

Signed-off-by: Pet Weng <pet.weng@xxxxxxxxxx>
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxxxxxxxx>
---
 .../bindings/display/bridge/ite,it61620.yaml       | 152 +++++++++++++++++++++
 1 file changed, 152 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/bridge/ite,it61620.yaml b/Documentation/devicetree/bindings/display/bridge/ite,it61620.yaml
new file mode 100644
index 0000000000000000000000000000000000000000..d4f0edeecd0e22f3fa92c9f8e276ce0806c24790
--- /dev/null
+++ b/Documentation/devicetree/bindings/display/bridge/ite,it61620.yaml
@@ -0,0 +1,152 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/display/bridge/ite,it61620.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ITE IT61620 MIPI DSI to HDMI Bridge
+
+maintainers:
+  - Pet Weng <pet.weng@xxxxxxxxxx>
+
+description: |
+  The ITE IT61620 is a high-performance, low-power HDMI bridge that converts
+  MIPI DSI input to HDMI 1.4b TMDS output. It supports up to 4 lanes of MIPI
+  D-PHY 2.0 input at 2.5Gbps per lane (10Gbps total), compatible with DSI-2
+  v2.0.
+
+  The HDMI transmitter side supports up to 4Kx2K@30Hz resolutions, and is
+  compliant with HDMI 1.4b and HDCP 1.4.
+
+  For audio, the IT61620 supports up to 8-channel LPCM via I2S (multi-line or
+  TDM mode), with optional S/PDIF or DSD (for SACD). It supports audio
+  sampling rates up to 192kHz.
+
+  IT61620 is a variant of IT6162.
+  The main differences are listed below
+  - IT61620 supports only a single MIPI DSI input port, while IT6162 supports
+    dual MIPI DSI ports.
+  - IT61620 does not include the internal MCU present in IT6162.
+
+  Because of these architectural differences, IT61620 uses a separate
+  compatible string even though the external interfaces and bindings are
+  largely similar.
+
+allOf:
+  - $ref: /schemas/sound/dai-common.yaml#
+
+properties:
+  compatible:
+    const: ite,it61620
+
+  reg:
+    maxItems: 1
+
+  interrupts:
+    maxItems: 1
+
+  reset-gpios:
+    maxItems: 1
+
+  ivdd-supply:
+    description: core voltage
+
+  ovdd-supply:
+    description: I/O voltage
+
+  ovdd1833-supply:
+    description: flexible I/O voltage
+
+  "#sound-dai-cells":
+    const: 0
+
+  ports:
+    $ref: /schemas/graph.yaml#/properties/ports
+
+    properties:
+      port@0:
+        $ref: /schemas/graph.yaml#/$defs/port-base
+        unevaluatedProperties: false
+        description: Input port for MIPI DSI
+
+        properties:
+          endpoint:
+            $ref: /schemas/media/video-interfaces.yaml#
+            unevaluatedProperties: false
+            required:
+              - data-lanes
+
+      port@1:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Output port for HDMI output
+
+      port@2:
+        $ref: /schemas/graph.yaml#/properties/port
+        description: Audio input port (I2S)
+
+    required:
+      - port@0
+      - port@1
+
+required:
+  - compatible
+  - reg
+  - interrupts
+  - reset-gpios
+  - ivdd-supply
+  - ovdd-supply
+  - ovdd1833-supply
+  - ports
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/gpio/gpio.h>
+    #include <dt-bindings/interrupt-controller/irq.h>
+
+    i2c {
+        #address-cells = <1>;
+        #size-cells = <0>;
+
+        bridge@58 {
+            compatible = "ite,it61620";
+            reg = <0x58>;
+            #sound-dai-cells = <0>;
+            interrupt-parent = <&pio>;
+            interrupts = <128 IRQ_TYPE_LEVEL_LOW>;
+            pinctrl-names = "default";
+            pinctrl-0 = <&it61620_pins>;
+            reset-gpios = <&pio 127 GPIO_ACTIVE_LOW>;
+            ivdd-supply = <&pp1000_hdmi_x>;
+            ovdd-supply = <&pp3300_vio28_x>;
+            ovdd1833-supply = <&pp1800_vcamio_x>;
+
+            ports {
+                #address-cells = <1>;
+                #size-cells = <0>;
+
+                port@0 {
+                    reg = <0>;
+                    it61620_dsi_in: endpoint {
+                        data-lanes = <0 1 2 3>;
+                        remote-endpoint = <&dsi_out>;
+                    };
+                };
+
+                port@1 {
+                    reg = <1>;
+                    it61620_hdmi_out: endpoint {
+                        remote-endpoint = <&hdmi_connector_in>;
+                    };
+                };
+
+                port@2 {
+                    reg = <2>;
+                    it61620_audio_in: endpoint {
+                        remote-endpoint = <&i2s0_out>;
+                    };
+                };
+            };
+        };
+    };

-- 
2.34.1