linux-kernel - Re: [PATCH 1/5] dt-bindings: display: mediatek: mdp-rsz: Add rules for MT8196

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Message-ID: <20250211-feed-shed-4b32f146cc54@spud>
Date: Tue, 11 Feb 2025 17:54:25 +0000
From: Conor Dooley <conor@...nel.org>
To: Sunny Shen <sunny.shen@...iatek.com>
Cc: Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Chun-Kuang Hu <chunkuang.hu@...nel.org>,
	AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
	Matthias Brugger <matthias.bgg@...il.com>,
	Philipp Zabel <p.zabel@...gutronix.de>,
	Fei Shao <fshao@...omium.org>, Pin-yen Lin <treapking@...omium.org>,
	"Jason-JH . Lin" <jason-jh.lin@...iatek.com>,
	Nancy Lin <nancy.lin@...iatek.com>,
	Singo Chang <singo.chang@...iatek.com>,
	"Paul Chen --cc=devicetree @ vger . kernel . org" <paul-pl.chen@...iatek.com>,
	linux-kernel@...r.kernel.org, dri-devel@...ts.freedesktop.org,
	linux-mediatek@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org,
	Project_Global_Chrome_Upstream_Group@...iatek.com
Subject: Re: [PATCH 1/5] dt-bindings: display: mediatek: mdp-rsz: Add rules
 for MT8196

On Tue, Feb 11, 2025 at 10:52:50AM +0800, Sunny Shen wrote:
> Add MDP-RSZ hardware description for MediaTek MT8196 SoC
> 
> Signed-off-by: Sunny Shen <sunny.shen@...iatek.com>
> ---
>  .../display/mediatek/mediatek,mdp-rsz.yaml    | 46 +++++++++++++++++++
>  1 file changed, 46 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-rsz.yaml
> 
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-rsz.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-rsz.yaml
> new file mode 100644
> index 000000000000..6642b9aa651a
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,mdp-rsz.yaml
> @@ -0,0 +1,46 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/display/mediatek/mediatek,mdp-rsz.yaml#

Filename matching compatible please

> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: MediaTek display multimedia data path resizer
> +
> +maintainers:
> +  - Chun-Kuang Hu <chunkuang.hu@...nel.org>
> +  - Philipp Zabel <p.zabel@...gutronix.de>
> +
> +description: |
> +  MediaTek display multimedia data path resizer, namely MDP-RSZ,
> +  can do scaling up/down to the picture.
> +
> +properties:
> +  compatible:
> +    const: mediatek,mt8196-disp-mdp-rsz
> +
> +  reg:
> +    maxItems: 1
> +
> +  clocks:
> +    items:
> +      - description: MDP-RSZ Clock

This can just be "maxItems: 1"

> +
> +required:
> +  - compatible
> +  - reg
> +  - clocks
> +
> +additionalProperties: false
> +
> +examples:
> +  - |
> +    soc {
> +        #address-cells = <2>;
> +        #size-cells = <2>;
> +
> +        disp_mdp_rsz0: disp-mdp-rsz0@...a0000 {

And "disp-mdp-rsz0" isn't anything close to a generic node name.

> +            compatible = "mediatek,mt8196-disp-mdp-rsz";
> +            reg = <0 0x321a0000 0 0x1000>;
> +            clocks = <&dispsys_config_clk 101>;

Surprised there are so few properties, no ports link or anything like
that?

> +        };
> +    };
> -- 
> 2.34.1
> 

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