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Date:   Thu, 6 Apr 2023 10:18:25 -0500
From:   Rob Herring <robh@kernel.org>
To:     Pin-yen Lin <treapking@chromium.org>
Cc:     Andrzej Hajda <andrzej.hajda@intel.com>,
        Neil Armstrong <neil.armstrong@linaro.org>,
        Robert Foss <rfoss@kernel.org>,
        Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
        Jonas Karlman <jonas@kwiboo.se>,
        Jernej Skrabec <jernej.skrabec@gmail.com>,
        David Airlie <airlied@gmail.com>,
        Daniel Vetter <daniel@ffwll.ch>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@linaro.org>,
        Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
        Daniel Scally <djrscally@gmail.com>,
        Heikki Krogerus <heikki.krogerus@linux.intel.com>,
        Sakari Ailus <sakari.ailus@linux.intel.com>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        "Rafael J . Wysocki" <rafael@kernel.org>,
        Prashant Malani <pmalani@chromium.org>,
        Benson Leung <bleung@chromium.org>,
        Guenter Roeck <groeck@chromium.org>,
        Xin Ji <xji@analogixsemi.com>, Marek Vasut <marex@denx.de>,
        Hsin-Yi Wang <hsinyi@chromium.org>,
        Thomas Zimmermann <tzimmermann@suse.de>,
        AngeloGioacchino Del Regno 
        <angelogioacchino.delregno@collabora.com>,
        Lyude Paul <lyude@redhat.com>, devicetree@vger.kernel.org,
        Stephen Boyd <swboyd@chromium.org>,
        dri-devel@lists.freedesktop.org, linux-acpi@vger.kernel.org,
        chrome-platform@lists.linux.dev,
        =?UTF-8?B?TsOtY29sYXMgRiAuIFIgLiBBIC4gUHJhZG8=?= 
        <nfraprado@collabora.com>,
        Javier Martinez Canillas <javierm@redhat.com>,
        linux-kernel@vger.kernel.org,
        Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>,
        Chen-Yu Tsai <wenst@chromium.org>
Subject: Re: [PATCH v15 04/10] dt-bindings: display: bridge: anx7625: Add
 mode-switch support
Message-ID: <20230406151825.GB3098002-robh@kernel.org>
References: <20230331091145.737305-1-treapking@chromium.org>
 <20230331091145.737305-5-treapking@chromium.org>
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On Fri, Mar 31, 2023 at 05:11:39PM +0800, Pin-yen Lin wrote:
> Analogix 7625 can be used in systems to switch the DP traffic between
> two downstreams, which can be USB Type-C DisplayPort alternate mode
> lane or regular DisplayPort output ports.
> 
> Update the binding to accommodate this usage by introducing a
> data-lanes and a mode-switch property on endpoints.
> 
> Also include the link to the product brief in the bindings.
> 
> Signed-off-by: Pin-yen Lin <treapking@chromium.org>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> Reviewed-by: Chen-Yu Tsai <wenst@chromium.org>
> Tested-by: Chen-Yu Tsai <wenst@chromium.org>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> 
> ---
> 
> (no changes since v12)
> 
> Changes in v12:
> - Removed the 4-lane binding in analogix,anx7625.yaml
> - Reworded the description for the mode-switch property
> 
> Changes in v11:
> - Updated the description of the endpoints
> - Referenced video-interfaces.yaml instead for the endpoints
> 
> Changes in v10:
> - Collected Reviewed-by and Tested-by tags
> 
> Changes in v9:
> - Collected Reviewed-by tag
> 
> Changes in v8:
> - Updated anx7625 bindings for data-lane property
> - Fixed the subject prefix
> 
> Changes in v7:
> - Fixed issues reported by dt_binding_check
> - Updated the schema and the example dts for data-lanes.
> - Changed to generic naming for the example dts node.
> 
> Changes in v6:
> - Remove switches node and use endpoints and data-lanes property to
>   describe the connections.
> 
>  .../display/bridge/analogix,anx7625.yaml      | 88 ++++++++++++++++++-
>  1 file changed, 85 insertions(+), 3 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> index b42553ac505c..604c7391d74f 100644
> --- a/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/analogix,anx7625.yaml
> @@ -12,7 +12,8 @@ maintainers:
>  
>  description: |
>    The ANX7625 is an ultra-low power 4K Mobile HD Transmitter
> -  designed for portable devices.
> +  designed for portable devices. Product brief is available at
> +  https://www.analogix.com/en/system/files/AA-002291-PB-6-ANX7625_ProductBrief.pdf
>  
>  properties:
>    compatible:
> @@ -112,9 +113,40 @@ properties:
>                data-lanes: true
>  
>        port@1:
> -        $ref: /schemas/graph.yaml#/properties/port
> +        $ref: /schemas/graph.yaml#/$defs/port-base
>          description:
> -          Video port for panel or connector.
> +          Video port for panel or connector. Each endpoint connects to a video
> +          output downstream, and the "data-lanes" property is used to describe
> +          the pin connections. 0, 1, 2, 3 in "data-lanes" maps to SSRX1, SSTX1,
> +          SSRX2, SSTX2, respectively.
> +
> +        patternProperties:
> +          "^endpoint@[01]$":
> +            $ref: /schemas/media/video-interfaces.yaml#

               unevaluatedProperties: false

> +            properties:
> +              reg: true
> +
> +              remote-endpoint: true

Don't need to list these 2.

> +
> +              data-lanes:
> +                oneOf:
> +                  - items:
> +                      - enum: [0, 1, 2, 3]
> +
> +                  - items:
> +                      - const: 0
> +                      - const: 1
> +
> +                  - items:
> +                      - const: 2
> +                      - const: 3
> +
> +              mode-switch:
> +                type: boolean
> +                description: Serves as Type-C mode switch if present.
> +
> +            required:
> +              - remote-endpoint

Don't need required.

>  
>      required:
>        - port@0
> @@ -186,3 +218,53 @@ examples:
>              };
>          };
>      };
> +  - |
> +    i2c3 {

i2c-3

But better yet, just expand the existing example rather than a whole new 
one.

> +        #address-cells = <1>;
> +        #size-cells = <0>;
> +
> +        encoder@58 {
> +            compatible = "analogix,anx7625";
> +            reg = <0x58>;
> +            pinctrl-names = "default";
> +            pinctrl-0 = <&anx7625_dp_pins>;
> +            enable-gpios = <&pio 176 GPIO_ACTIVE_HIGH>;
> +            reset-gpios = <&pio 177 GPIO_ACTIVE_HIGH>;
> +            vdd10-supply = <&pp1100_dpbrdg>;
> +            vdd18-supply = <&pp1800_dpbrdg_dx>;
> +            vdd33-supply = <&pp3300_dpbrdg_dx>;
> +            analogix,audio-enable;
> +
> +            ports {
> +                #address-cells = <1>;
> +                #size-cells = <0>;
> +
> +                port@0 {
> +                    reg = <0>;
> +                    anx7625_dp_in: endpoint {
> +                        bus-type = <7>;
> +                        remote-endpoint = <&dpi_out>;
> +                    };
> +                };
> +
> +                port@1 {
> +                    #address-cells = <1>;
> +                    #size-cells = <0>;
> +
> +                    reg = <1>;
> +                    anx_typec0: endpoint@0 {
> +                        reg = <0>;
> +                        mode-switch;
> +                        data-lanes = <0 1>;
> +                        remote-endpoint = <&typec_port0>;
> +                    };
> +                    anx_typec1: endpoint@1 {
> +                        reg = <1>;
> +                        mode-switch;
> +                        data-lanes = <2 3>;
> +                        remote-endpoint = <&typec_port1>;
> +                    };
> +                };
> +            };
> +        };
> +    };
> -- 
> 2.40.0.348.gf938b09366-goog
>