Re: [PATCH 1/2] dt-bindings:bridge Add LT7911EXC binding

[Dmitry Baryshkov]

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On Mon, 20 Apr 2026 at 05:34, <syyang@xxxxxxxxxxx> wrote:
>
> From: Sunyun Yang <syyang@xxxxxxxxxxx>
>
> -binding for lt7911exc.

Less is more, but here please settle for slightly more information
about the chip.

>
> Signed-off-by: Sunyun Yang <syyang@xxxxxxxxxxx>
> ---
>  .../display/bridge/lontium,lt7911exc.yaml     | 91 +++++++++++++++++++
>  1 file changed, 91 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/bridge/lontium,lt7911exc.yaml
>
> diff --git a/Documentation/devicetree/bindings/display/bridge/lontium,lt7911exc.yaml b/Documentation/devicetree/bindings/display/bridge/lontium,lt7911exc.yaml
> new file mode 100644
> index 000000000000..54a73d41635a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/lontium,lt7911exc.yaml
> @@ -0,0 +1,91 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/bridge/lontium,lt7911exc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Lontium LT7911EXC eDP to MIPI Bridge
> +
> +maintainers:
> +  - Sunyun Yang <syyang@xxxxxxxxxxx>
> +
> +properties:
> +  compatible:
> +    enum:
> +      - lontium,lt7911exc
> +
> +  reg:
> +    maxItems: 1
> +
> +  reset-gpios:
> +    maxItems: 1
> +    description: GPIO connected to RST_ pin.
> +
> +  vdd-supply:
> +    description: Regulator for 1.2V MIPI phy power.
> +
> +  vcc-supply:
> +    description: Regulator for 3.3V IO power.
> +
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      port@0:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: Video port for mipi dsi output.

MIPI, DSI

> +
> +      port@1:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: Video port for eDP input.
> +
> +    required:
> +      - port@0
> +      - port@1
> +
> +required:
> +  - compatible
> +  - reg
> +  - reset-gpios
> +  - vdd-supply
> +  - vcc-supply
> +  - ports
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/gpio/gpio.h>
> +    i2c {
> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        mipi-bridge@41 {
> +            compatible = "lontium,lt7911exc";
> +            reg = <0x41>;
> +            reset-gpios = <&gpy8 8 GPIO_ACTIVE_HIGH>;

Reset pins are usually active low.

> +            vdd-supply = <&lt7911exc_1v2>;
> +            vcc-supply = <&lt7911exc_3v3>;
> +
> +            ports {
> +                #address-cells = <1>;
> +                #size-cells = <0>;
> +
> +                port@0 {
> +                    reg = <0>;
> +
> +                    bridge_out: endpoint {
> +                        remote-endpoint = <&panel_in>;
> +                    };
> +                };
> +
> +                port@1 {
> +                    reg = <1>;
> +
> +                    bridge_in: endpoint {
> +                        remote-endpoint = <&edp_out>;
> +                    };
> +                };
> +            };
> +        };
> +    };

-- 
With best wishes
Dmitry