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Date:   Mon, 2 Jan 2023 15:09:30 +0200
From:   Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To:     Rahul T R <r-ravikumar@ti.com>
Cc:     dri-devel@lists.freedesktop.org, robh+dt@kernel.org,
        krzysztof.kozlowski+dt@linaro.org, tomi.valkeinen@ideasonboard.com,
        andrzej.hajda@intel.com, narmstrong@baylibre.com,
        robert.foss@linaro.org, jonas@kwiboo.se, jernej.skrabec@gmail.com,
        airlied@linux.ie, daniel@ffwll.ch, p.zabel@pengutronix.de,
        linux-kernel@vger.kernel.org, jpawar@cadence.com,
        sjakhade@cadence.com, mparab@cadence.com, a-bhatia1@ti.com,
        devicetree@vger.kernel.org, vigneshr@ti.com, lee.jones@linaro.org,
        Rob Herring <robh@kernel.org>
Subject: Re: [PATCH v10 1/5] dt-bindings: display: bridge: Convert
 cdns,dsi.txt to yaml
Message-ID: <Y7LXijFeN7zXLqWD@pendragon.ideasonboard.com>
References: <20230102100942.1828-1-r-ravikumar@ti.com>
 <20230102100942.1828-2-r-ravikumar@ti.com>
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Hi Rahul,

Thank you for the patch.

On Mon, Jan 02, 2023 at 03:39:38PM +0530, Rahul T R wrote:
> Convert cdns,dsi.txt binding to yaml format
> 
> Signed-off-by: Rahul T R <r-ravikumar@ti.com>
> Reviewed-by: Rob Herring <robh@kernel.org>
> ---
>  .../bindings/display/bridge/cdns,dsi.txt      | 112 -------------
>  .../bindings/display/bridge/cdns,dsi.yaml     | 157 ++++++++++++++++++
>  2 files changed, 157 insertions(+), 112 deletions(-)
>  delete mode 100644 Documentation/devicetree/bindings/display/bridge/cdns,dsi.txt
>  create mode 100644 Documentation/devicetree/bindings/display/bridge/cdns,dsi.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/cdns,dsi.txt b/Documentation/devicetree/bindings/display/bridge/cdns,dsi.txt
> deleted file mode 100644
> index 525a4bfd8634..000000000000
> --- a/Documentation/devicetree/bindings/display/bridge/cdns,dsi.txt
> +++ /dev/null
> @@ -1,112 +0,0 @@
> -Cadence DSI bridge
> -==================
> -
> -The Cadence DSI bridge is a DPI to DSI bridge supporting up to 4 DSI lanes.
> -
> -Required properties:
> -- compatible: should be set to "cdns,dsi".
> -- reg: physical base address and length of the controller's registers.
> -- interrupts: interrupt line connected to the DSI bridge.
> -- clocks: DSI bridge clocks.
> -- clock-names: must contain "dsi_p_clk" and "dsi_sys_clk".
> -- phys: phandle link to the MIPI D-PHY controller.
> -- phy-names: must contain "dphy".
> -- #address-cells: must be set to 1.
> -- #size-cells: must be set to 0.
> -
> -Optional properties:
> -- resets: DSI reset lines.
> -- reset-names: can contain "dsi_p_rst".
> -
> -Required subnodes:
> -- ports: Ports as described in Documentation/devicetree/bindings/graph.txt.
> -  2 ports are available:
> -  * port 0: this port is only needed if some of your DSI devices are
> -	    controlled through  an external bus like I2C or SPI. Can have at
> -	    most 4 endpoints. The endpoint number is directly encoding the
> -	    DSI virtual channel used by this device.
> -  * port 1: represents the DPI input.
> -  Other ports will be added later to support the new kind of inputs.
> -
> -- one subnode per DSI device connected on the DSI bus. Each DSI device should
> -  contain a reg property encoding its virtual channel.
> -
> -Example:
> -	dsi0: dsi@fd0c0000 {
> -		compatible = "cdns,dsi";
> -		reg = <0x0 0xfd0c0000 0x0 0x1000>;
> -		clocks = <&pclk>, <&sysclk>;
> -		clock-names = "dsi_p_clk", "dsi_sys_clk";
> -		interrupts = <1>;
> -		phys = <&dphy0>;
> -		phy-names = "dphy";
> -		#address-cells = <1>;
> -		#size-cells = <0>;
> -
> -		ports {
> -			#address-cells = <1>;
> -			#size-cells = <0>;
> -
> -			port@1 {
> -				reg = <1>;
> -				dsi0_dpi_input: endpoint {
> -					remote-endpoint = <&xxx_dpi_output>;
> -				};
> -			};
> -		};
> -
> -		panel: dsi-dev@0 {
> -			compatible = "<vendor,panel>";
> -			reg = <0>;
> -		};
> -	};
> -
> -or
> -
> -	dsi0: dsi@fd0c0000 {
> -		compatible = "cdns,dsi";
> -		reg = <0x0 0xfd0c0000 0x0 0x1000>;
> -		clocks = <&pclk>, <&sysclk>;
> -		clock-names = "dsi_p_clk", "dsi_sys_clk";
> -		interrupts = <1>;
> -		phys = <&dphy1>;
> -		phy-names = "dphy";
> -		#address-cells = <1>;
> -		#size-cells = <0>;
> -
> -		ports {
> -			#address-cells = <1>;
> -			#size-cells = <0>;
> -
> -			port@0 {
> -				reg = <0>;
> -				#address-cells = <1>;
> -				#size-cells = <0>;
> -
> -				dsi0_output: endpoint@0 {
> -					reg = <0>;
> -					remote-endpoint = <&dsi_panel_input>;
> -				};
> -			};
> -
> -			port@1 {
> -				reg = <1>;
> -				dsi0_dpi_input: endpoint {
> -					remote-endpoint = <&xxx_dpi_output>;
> -				};
> -			};
> -		};
> -	};
> -
> -	i2c@xxx {
> -		panel: panel@59 {
> -			compatible = "<vendor,panel>";
> -			reg = <0x59>;
> -
> -			port {
> -				dsi_panel_input: endpoint {
> -					remote-endpoint = <&dsi0_output>;
> -				};
> -			};
> -		};
> -	};
> diff --git a/Documentation/devicetree/bindings/display/bridge/cdns,dsi.yaml b/Documentation/devicetree/bindings/display/bridge/cdns,dsi.yaml
> new file mode 100644
> index 000000000000..3161c33093c1
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/bridge/cdns,dsi.yaml
> @@ -0,0 +1,157 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/bridge/cdns,dsi.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Cadence DSI bridge
> +
> +maintainers:
> +  - Boris Brezillon <boris.brezillon@bootlin.com>
> +
> +description: |
> +   CDNS DSI is a bridge device which converts DPI to DSI
> +
> +properties:
> +  compatible:
> +    enum:
> +      - cdns,dsi
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: PSM clock, used by the IP
> +      - description: sys clock, used by the IP
> +
> +  clock-names:
> +    items:
> +      - const: dsi_p_clk
> +      - const: dsi_sys_clk
> +
> +  phys:
> +    maxItems: 1
> +
> +  phy-names:
> +    const: dphy
> +
> +  interrupts:
> +    maxItems: 1
> +
> +  resets:
> +    maxItems: 1
> +
> +  reset-names:
> +    const: dsi_p_rst
> +
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      port@0:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description:
> +          Output port representing the DSI output. It can have
> +          at most 4 endpoints. The endpoint number is directly encoding
> +          the DSI virtual channel used by this device.

Using endpoints to model virtual channels isn't great, but that's not an
issue with this patch.

Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

> +
> +      port@1:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description:
> +          Input port representing the DPI input.
> +
> +    required:
> +      - port@1
> +
> +allOf:
> +  - $ref: ../dsi-controller.yaml#
> +
> +required:
> +  - compatible
> +  - reg
> +  - interrupts
> +  - clocks
> +  - clock-names
> +  - phys
> +  - phy-names
> +  - ports
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    bus {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        dsi@fd0c0000 {
> +            compatible = "cdns,dsi";
> +            reg = <0x0 0xfd0c0000 0x0 0x1000>;
> +            clocks = <&pclk>, <&sysclk>;
> +            clock-names = "dsi_p_clk", "dsi_sys_clk";
> +            interrupts = <1>;
> +            phys = <&dphy0>;
> +            phy-names = "dphy";
> +
> +            #address-cells = <1>;
> +            #size-cells = <0>;
> +
> +            ports {
> +                #address-cells = <1>;
> +                #size-cells = <0>;
> +
> +                port@1 {
> +                    reg = <1>;
> +                    endpoint {
> +                        remote-endpoint = <&xxx_dpi_output>;
> +                    };
> +                };
> +            };
> +
> +            panel@0 {
> +                compatible = "panasonic,vvx10f034n00";
> +                reg = <0>;
> +                power-supply = <&vcc_lcd_reg>;
> +            };
> +        };
> +    };
> +
> +  - |
> +    bus {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        dsi@fd0c0000 {
> +            compatible = "cdns,dsi";
> +            reg = <0x0 0xfd0c0000 0x0 0x1000>;
> +            clocks = <&pclk>, <&sysclk>;
> +            clock-names = "dsi_p_clk", "dsi_sys_clk";
> +            interrupts = <1>;
> +            phys = <&dphy1>;
> +            phy-names = "dphy";
> +
> +            ports {
> +                #address-cells = <1>;
> +                #size-cells = <0>;
> +
> +                port@0 {
> +                    reg = <0>;
> +                    #address-cells = <1>;
> +                    #size-cells = <0>;
> +
> +                    endpoint@0 {
> +                        reg = <0>;
> +                        remote-endpoint = <&dsi_panel_input>;
> +                    };
> +                };
> +
> +                port@1 {
> +                    reg = <1>;
> +                    endpoint {
> +                        remote-endpoint = <&xxx_dpi_output>;
> +                    };
> +                };
> +            };
> +        };
> +    };

-- 
Regards,

Laurent Pinchart