linux-kernel - Re: [PATCH v4 04/13] dt-bindings: display: add Amlogic MIPI DSI Host Controller bindings

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Message-ID: <20230512-elevation-stream-8acf60905d6b@spud>
Date:   Fri, 12 May 2023 22:35:01 +0100
From:   Conor Dooley <conor@...nel.org>
To:     Neil Armstrong <neil.armstrong@...aro.org>
Cc:     Jerome Brunet <jbrunet@...libre.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Kevin Hilman <khilman@...libre.com>,
        Martin Blumenstingl <martin.blumenstingl@...glemail.com>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        David Airlie <airlied@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        Philipp Zabel <p.zabel@...gutronix.de>,
        Vinod Koul <vkoul@...nel.org>,
        Kishon Vijay Abraham I <kishon@...nel.org>,
        Sam Ravnborg <sam@...nborg.org>,
        Nicolas Belin <nbelin@...libre.com>,
        linux-amlogic@...ts.infradead.org, linux-clk@...r.kernel.org,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, dri-devel@...ts.freedesktop.org,
        linux-phy@...ts.infradead.org
Subject: Re: [PATCH v4 04/13] dt-bindings: display: add Amlogic MIPI DSI Host
 Controller bindings

On Fri, May 12, 2023 at 03:11:35PM +0200, Neil Armstrong wrote:
> The Amlogic G12A, G12B & SM1 SoCs embeds a Synopsys DW-MIPI-DSI transceiver (ver 1.21a),
> with a custom glue managing the IP resets, clock and data input similar to the DW-HDMI Glue
> on the same Amlogic SoCs.
> 
> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
> Signed-off-by: Neil Armstrong <neil.armstrong@...aro.org>

This looks fine to me,
Reviewed-by: Conor Dooley <conor.dooley@...rochip.com>
but I would like Krzysztof to take a look too to be on the safe side!

Cheers,
Conor.

> ---
>  .../display/amlogic,meson-g12a-dw-mipi-dsi.yaml    | 117 +++++++++++++++++++++
>  1 file changed, 117 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/display/amlogic,meson-g12a-dw-mipi-dsi.yaml b/Documentation/devicetree/bindings/display/amlogic,meson-g12a-dw-mipi-dsi.yaml
> new file mode 100644
> index 000000000000..8169c7e93ff5
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/amlogic,meson-g12a-dw-mipi-dsi.yaml
> @@ -0,0 +1,117 @@
> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
> +# Copyright 2020 BayLibre, SAS
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/amlogic,meson-g12a-dw-mipi-dsi.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Amlogic specific extensions to the Synopsys Designware MIPI DSI Host Controller
> +
> +maintainers:
> +  - Neil Armstrong <neil.armstrong@...aro.org>
> +
> +description: |
> +  The Amlogic Meson Synopsys Designware Integration is composed of
> +  - A Synopsys DesignWare MIPI DSI Host Controller IP
> +  - A TOP control block controlling the Clocks & Resets of the IP
> +
> +allOf:
> +  - $ref: dsi-controller.yaml#
> +
> +properties:
> +  compatible:
> +    enum:
> +      - amlogic,meson-g12a-dw-mipi-dsi
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    minItems: 3
> +
> +  clock-names:
> +    minItems: 3
> +    items:
> +      - const: pclk
> +      - const: bit_clk
> +      - const: px_clk
> +      - const: meas_clk
> +
> +  resets:
> +    minItems: 1
> +
> +  reset-names:
> +    items:
> +      - const: top
> +
> +  phys:
> +    minItems: 1
> +
> +  phy-names:
> +    items:
> +      - const: dphy
> +
> +  ports:
> +    $ref: /schemas/graph.yaml#/properties/ports
> +
> +    properties:
> +      port@0:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: Input node to receive pixel data.
> +
> +      port@1:
> +        $ref: /schemas/graph.yaml#/properties/port
> +        description: DSI output node to panel.
> +
> +    required:
> +      - port@0
> +      - port@1
> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +  - clock-names
> +  - resets
> +  - reset-names
> +  - phys
> +  - phy-names
> +  - ports
> +
> +unevaluatedProperties: false
> +
> +examples:
> +  - |
> +    dsi@...0 {
> +          compatible = "amlogic,meson-g12a-dw-mipi-dsi";
> +          reg = <0x6000 0x400>;
> +          resets = <&reset_top>;
> +          reset-names = "top";
> +          clocks = <&clk_pclk>, <&bit_clk>, <&clk_px>;
> +          clock-names = "pclk", "bit_clk", "px_clk";
> +          phys = <&mipi_dphy>;
> +          phy-names = "dphy";
> +
> +          ports {
> +              #address-cells = <1>;
> +              #size-cells = <0>;
> +
> +              /* VPU VENC Input */
> +              mipi_dsi_venc_port: port@0 {
> +                  reg = <0>;
> +
> +                  mipi_dsi_in: endpoint {
> +                       remote-endpoint = <&dpi_out>;
> +                  };
> +              };
> +
> +              /* DSI Output */
> +              mipi_dsi_panel_port: port@1 {
> +                  reg = <1>;
> +
> +                  mipi_out_panel: endpoint {
> +                      remote-endpoint = <&mipi_in_panel>;
> +                  };
> +              };
> +          };
> +    };
> 
> -- 
> 2.34.1
> 

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