linux-kernel - Re: [PATCH v3 1/3] dt-bindings: display: bridge: add it66121 bindings

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Message-ID: <7111ccdf-ff64-f959-a652-623fa89ffe87@baylibre.com>
Date:   Wed, 14 Apr 2021 10:14:36 +0200
From:   Neil Armstrong <narmstrong@...libre.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     a.hajda@...sung.com, paul@...pouillou.net, robert.foss@...aro.org,
        devicetree@...r.kernel.org, jonas@...boo.se,
        jernej.skrabec@...l.net, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, Phong LE <ple@...libre.com>
Subject: Re: [PATCH v3 1/3] dt-bindings: display: bridge: add it66121 bindings

On 13/04/2021 18:03, Laurent Pinchart wrote:
> Hi Neil,
> 
> Thank you for the patch.
> 
> On Mon, Apr 12, 2021 at 05:46:46PM +0200, Neil Armstrong wrote:
>> From: Phong LE <ple@...libre.com>
>>
>> Add the ITE bridge HDMI it66121 bindings.
>>
>> Signed-off-by: Phong LE <ple@...libre.com>
>> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
>> ---
>>  .../bindings/display/bridge/ite,it66121.yaml  | 123 ++++++++++++++++++
>>  1 file changed, 123 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/display/bridge/ite,it66121.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/display/bridge/ite,it66121.yaml b/Documentation/devicetree/bindings/display/bridge/ite,it66121.yaml
>> new file mode 100644
>> index 000000000000..61ed6dc7740b
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/display/bridge/ite,it66121.yaml
>> @@ -0,0 +1,123 @@
>> +# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: http://devicetree.org/schemas/display/bridge/ite,it66121.yaml#
>> +$schema: http://devicetree.org/meta-schemas/core.yaml#
>> +
>> +title: ITE it66121 HDMI bridge Device Tree Bindings
>> +
>> +maintainers:
>> +  - Phong LE <ple@...libre.com>
>> +  - Neil Armstrong <narmstrong@...libre.com>
>> +
>> +description: |
>> +  The IT66121 is a high-performance and low-power single channel HDMI
>> +  transmitter, fully compliant with HDMI 1.3a, HDCP 1.2 and backward compatible
>> +  to DVI 1.0 specifications.
>> +
>> +properties:
>> +  compatible:
>> +    const: ite,it66121
>> +
>> +  reg:
>> +    maxItems: 1
>> +    description: base I2C address of the device
> 
> You can drop the description.

Done

> 
>> +
>> +  reset-gpios:
>> +    maxItems: 1
>> +    description: GPIO connected to active low reset
>> +
>> +  vrf12-supply:
>> +    description: Regulator for 1.2V analog core power.
>> +
>> +  vcn33-supply:
>> +    description: Regulator for 3.3V digital core power.
>> +
>> +  vcn18-supply:
>> +    description: Regulator for 1.8V IO core power.
>> +
>> +  interrupts:
>> +    maxItems: 1
>> +
>> +  ports:
>> +    $ref: /schemas/graph.yaml#/properties/ports
>> +
>> +    properties:
>> +      port@0:
>> +        $ref: /schemas/graph.yaml#/$defs/port-base
>> +        unevaluatedProperties: false
>> +        description: DPI input port.
>> +
>> +        properties:
>> +          endpoint:
>> +            $ref: /schemas/graph.yaml#/$defs/endpoint-base
>> +            unevaluatedProperties: false
>> +
>> +            properties:
>> +              bus-width:
>> +                description:
>> +                  Endpoint bus width.
>> +                enum:
>> +                  - 12  # 12 data lines connected and dual-edge mode
>> +                  - 24  # 24 data lines connected and single-edge mode
>> +                default: 24
>> +
>> +      port@1:
>> +        $ref: /schemas/graph.yaml#/properties/port
>> +        description: HDMI Connector port.
>> +
>> +    required:
>> +      - port@0
>> +      - port@1
>> +
>> +required:
>> +  - compatible
>> +  - reg
>> +  - reset-gpios
>> +  - vrf12-supply
>> +  - vcn33-supply
>> +  - vcn18-supply
>> +  - interrupts
>> +  - ports
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> +  - |
>> +    i2c {
>> +      #address-cells = <1>;
>> +      #size-cells = <0>;
> 
> It's customary to indent DT examples with 4 spaces.

Done

> 
>> +
>> +      it66121hdmitx: it66121hdmitx@4c {
>> +        compatible = "ite,it66121";
>> +        pinctrl-names = "default";
>> +        pinctrl-0 = <&ite_pins_default>;
>> +        vcn33-supply = <&mt6358_vcn33_wifi_reg>;
>> +        vcn18-supply = <&mt6358_vcn18_reg>;
>> +        vrf12-supply = <&mt6358_vrf12_reg>;
>> +        reset-gpios = <&pio 160 1 /* GPIO_ACTIVE_LOW */>;
> 
> You can #include the necessary headers at the top of the example, and
> use GPIO_ACTIVE_LOW and IRQ_TYPE_LEVEL_LOW to replace the numerical
> values.

Done

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

Thanks,
Neil

> 
>> +        interrupt-parent = <&pio>;
>> +        interrupts = <4 8 /* IRQ_TYPE_LEVEL_LOW */>;
>> +        reg = <0x4c>;
>> +
>> +        ports {
>> +          #address-cells = <1>;
>> +          #size-cells = <0>;
>> +
>> +          port@0 {
>> +            reg = <0>;
>> +            it66121_in: endpoint {
>> +              bus-width = <12>;
>> +              remote-endpoint = <&display_out>;
>> +            };
>> +          };
>> +
>> +          port@1 {
>> +            reg = <1>;
>> +            hdmi_conn_out: endpoint {
>> +              remote-endpoint = <&hdmi_conn_in>;
>> +            };
>> +          };
>> +        };
>> +      };
>> +    };
>