linux-kernel - Re: [PATCH v1 1/7] dt-bindings: display: mediatek: Add binding for HDMIv2 DDC

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Message-ID: <20241121210235.GA3798341-robh@kernel.org>
Date: Thu, 21 Nov 2024 15:02:35 -0600
From: Rob Herring <robh@...nel.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: chunkuang.hu@...nel.org, p.zabel@...gutronix.de, airlied@...il.com,
	simona@...ll.ch, maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org, tzimmermann@...e.de, krzk+dt@...nel.org,
	conor+dt@...nel.org, matthias.bgg@...il.com, ck.hu@...iatek.com,
	dri-devel@...ts.freedesktop.org, linux-mediatek@...ts.infradead.org,
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-arm-kernel@...ts.infradead.org, kernel@...labora.com
Subject: Re: [PATCH v1 1/7] dt-bindings: display: mediatek: Add binding for
 HDMIv2 DDC

On Wed, Nov 20, 2024 at 01:45:06PM +0100, AngeloGioacchino Del Regno wrote:
> Add a binding for the Display Data Channel (DDC) IP in MediaTek
> SoCs with version 2 HDMI TX IP.
> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>  .../mediatek/mediatek,mt8195-hdmi-ddc.yaml    | 41 +++++++++++++++++++
>  1 file changed, 41 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/mediatek/mediatek,mt8195-hdmi-ddc.yaml
> 
> diff --git 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..d85e8ed2ffa7
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,mt8195-hdmi-ddc.yaml
> @@ -0,0 +1,41 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/mediatek/mediatek,mt8195-hdmi-ddc.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek HDMI Display Data Channel (DDC) v2
> +
> +maintainers:
> +  - AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> +  - CK Hu <ck.hu@...iatek.com>
> +
> +properties:
> +  compatible:
> +    oneOf:
> +      - const: mediatek,mt8195-hdmi-ddc
> +      - items:
> +          - const: mediatek,mt8188-hdmi-ddc
> +          - const: mediatek,mt8195-hdmi-ddc
> +
> +  clocks:
> +    maxItems: 1
> +
> +  power-domains:
> +    maxItems: 1
> +
> +required:
> +  - compatible
> +  - clocks
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    hdmi {
> +        hdmi_ddc: i2c {
> +            compatible = "mediatek,mt8195-hdmi-ddc";
> +            clocks = <&clk26m>;

Is this really a separate block? Doesn't really look like it. You don't 
even have registers to interact with it.

> +        };
> +    };
> +...
> -- 
> 2.47.0
>