Re: [PATCH v3 02/12] dt-bindings: display: mediatek: add MT8195 hdmi bindings

[CK Hu (胡俊光)]

Hi, Guillaume:

On Fri, 2022-11-04 at 15:09 +0100, Guillaume Ranquet wrote:
> Add mt8195 SoC bindings for hdmi and hdmi-ddc
> 
> On mt8195 the ddc i2c controller is part of the hdmi IP block and
> thus has no
> specific register range, power domain or interrupt, making it simpler
> than its the legacy "mediatek,hdmi-ddc" binding.
> 
> Signed-off-by: Guillaume Ranquet <granquet@xxxxxxxxxxxx>
> ---
>  

[snip]

> a/Documentation/devicetree/bindings/display/mediatek/mediatek,mt8195-
> hdmi-ddc.yaml
> b/Documentation/devicetree/bindings/display/mediatek/mediatek,mt8195-
> hdmi-ddc.yaml
> new file mode 100644
> index 000000000000..2dc273689584
> --- /dev/null
> +++
> b/Documentation/devicetree/bindings/display/mediatek/mediatek,mt8195-
> hdmi-ddc.yaml
> @@ -0,0 +1,51 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: 
> https://urldefense.com/v3/__http://devicetree.org/schemas/display/mediatek/mediatek,mt8195-hdmi-ddc.yaml*__;Iw!!CTRNKA9wMg0ARbw!wwVQuq5lzW0lvUFUkVXPWT8cIu96xdkn4tMams1E55qyxEZmgV1i0WfpOlq57w$
>  
> +$schema: 
> https://urldefense.com/v3/__http://devicetree.org/meta-schemas/core.yaml*__;Iw!!CTRNKA9wMg0ARbw!wwVQuq5lzW0lvUFUkVXPWT8cIu96xdkn4tMams1E55qyxEZmgV1i0WdSGOSxzw$
>  
> +
> +title: Mediatek HDMI DDC for mt8195
> +
> +maintainers:
> +  - CK Hu <ck.hu@xxxxxxxxxxxx>
> +  - Jitao shi <jitao.shi@xxxxxxxxxxxx>
> +
> +description: |
> +  The HDMI DDC i2c controller is used to interface with the HDMI DDC
> pins.
> +
> +properties:
> +  compatible:
> +    enum:
> +      - mediatek,mt8195-hdmi-ddc
> +
> +  clocks:
> +    maxItems: 1
> +
> +  clock-names:
> +    items:
> +      - const: ddc
> +
> +  mediatek,hdmi:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description:
> +      A phandle to the mt8195 hdmi controller
> +
> +required:
> +  - compatible
> +  - clocks
> +  - clock-names
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    #include <dt-bindings/interrupt-controller/arm-gic.h>
> +    #include <dt-bindings/interrupt-controller/irq.h>
> +    hdmiddc0: i2c {
> +      compatible = "mediatek,mt8195-hdmi-ddc";
> +      mediatek,hdmi = <&hdmi0>;
> +      clocks = <&clk26m>;
> +      clock-names = "ddc";
> +    };

I think we should not have a virtual device. This ddc is part of
mt8195-hdmi device, so just keep mt8195-hdmi, and let mt8195-hdmi
driver to probe the sub driver of ddc driver.

Regards,
CK

> +
> +...
>