Commit 784c9933 authored by Svyatoslav Ryhel's avatar Svyatoslav Ryhel Committed by Dmitry Baryshkov
Browse files

dt-bindings: display: bridge: Document Solomon SSD2825 



Add bindings for Solomon SSD2825 MIPI master bridge chip that connects an
application processor with traditional parallel LCD interface and an LCD
driver with MIPI slave interface. The SSD2825 supports both parallel RGB
interface and serial SPI interface.

Signed-off-by: default avatarSvyatoslav Ryhel <clamor95@gmail.com>
Reviewed-by: default avatarKrzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20250730055424.6718-2-clamor95@gmail.com


Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
parent 85c23f28

Documentation/devicetree/bindings/display/bridge/solomon,ssd2825.yaml

0 → 100644
+141 −0
Original line number Diff line number Diff line 
# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)

%YAML 1.2

---

$id: http://devicetree.org/schemas/display/bridge/solomon,ssd2825.yaml#

$schema: http://devicetree.org/meta-schemas/core.yaml#



title: Solomon SSD2825 RGB to MIPI-DSI bridge



maintainers:

  - Svyatoslav Ryhel <clamor95@gmail.com>



allOf:

  - $ref: /schemas/spi/spi-peripheral-props.yaml#



properties:

  compatible:

    const: solomon,ssd2825



  reg:

    maxItems: 1



  reset-gpios: true



  dvdd-supply:

    description: Regulator for 1.2V digital power supply.



  avdd-supply:

    description: Regulator for 1.2V analog power supply.



  vddio-supply:

    description: Regulator for 1.8V IO power supply.



  spi-max-frequency:

    maximum: 1000000



  spi-cpha: true

  spi-cpol: true



  clocks:

    maxItems: 1

    description: Reference TX_CLK used before PLL is locked.



  solomon,hs-zero-delay-ns:

    description:

      HS zero delay period

    minimum: 0

    maximum: 1700

    default: 133



  solomon,hs-prep-delay-ns:

    description:

      HS prep delay period

    minimum: 0

    maximum: 1728

    default: 40



  ports:

    $ref: /schemas/graph.yaml#/properties/ports



    properties:

      port@0:

        $ref: /schemas/graph.yaml#/$defs/port-base

        unevaluatedProperties: false

        description:

          Video port for RGB input



        properties:

          endpoint:

            $ref: /schemas/graph.yaml#/$defs/endpoint-base

            unevaluatedProperties: false



            properties:

              bus-width:

                enum: [ 16, 18, 24 ]



      port@1:

        $ref: /schemas/graph.yaml#/properties/port

        description:

          Video port for DSI output (panel or connector)



    required:

      - port@0

      - port@1



required:

  - compatible

  - ports



additionalProperties: false



examples:

  - |

    #include <dt-bindings/gpio/gpio.h>



    spi {

        #address-cells = <1>;

        #size-cells = <0>;



        dsi@2 {

            compatible = "solomon,ssd2825";

            reg = <2>;



            spi-max-frequency = <1000000>;



            spi-cpha;

            spi-cpol;



            reset-gpios = <&gpio 114 GPIO_ACTIVE_LOW>;



            dvdd-supply = <&vdd_1v2>;

            avdd-supply = <&vdd_1v2>;

            vddio-supply = <&vdd_1v8_io>;



            solomon,hs-zero-delay-ns = <300>;

            solomon,hs-prep-delay-ns = <65>;



            clocks = <&ssd2825_tx_clk>;



            ports {

                #address-cells = <1>;

                #size-cells = <0>;



                port@0 {

                    reg = <0>;



                    bridge_input: endpoint {

                        remote-endpoint = <&dpi_output>;

                        bus-width = <24>;

                    };

                };



                port@1 {

                    reg = <1>;



                    bridge_output: endpoint {

                        remote-endpoint = <&panel_input>;

                    };

                };

            };

        };

    };