linux-kernel - Re: [PATCH 01/38] dt-bindings: display: mediatek: dpi: Allow specifying resets

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Message-ID: <CAGXv+5HTdK8aiUYdtNVhWAvsSNfMPgK6iCqe-Jsb-OBqQBWsBg@mail.gmail.com>
Date: Thu, 24 Jul 2025 17:16:21 +0800
From: Chen-Yu Tsai <wenst@...omium.org>
To: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
Cc: linux-mediatek@...ts.infradead.org, robh@...nel.org, 
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Subject: Re: [PATCH 01/38] dt-bindings: display: mediatek: dpi: Allow
 specifying resets

On Thu, Jul 24, 2025 at 4:39 PM AngeloGioacchino Del Regno
<angelogioacchino.delregno@...labora.com> wrote:
>
> Even though the DPI IP has a reset bit on all MediaTek SoCs, it
> is optional, and has always been unused until MT8195; specifically:
> on older SoCs, like MT8173, the reset bit is located in MMSYS, and
> on newer SoCs, like MT8195, it is located in VDOSYS.
>
> For this reason, allow specifying the resets and reset-names on
> all MediaTek SoCs.
>
> Those properties are optional because there are multiple ways to
> reset this IP and the reset lines in MM/VDO are used only if the
> IP cannot perform warm-reset.
>
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>
> ---
>  .../devicetree/bindings/display/mediatek/mediatek,dpi.yaml | 7 +++++++
>  1 file changed, 7 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.yaml b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.yaml
> index b659d79393a8..eb4f276e8dc4 100644
> --- a/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.yaml
> +++ b/Documentation/devicetree/bindings/display/mediatek/mediatek,dpi.yaml
> @@ -102,6 +102,13 @@ properties:
>        - port@0
>        - port@1
>
> +  resets:
> +    maxItems: 1
> +
> +  reset-names:
> +    items:
> +      - const: dpi
> +

Do we really need the name if there is only one though?

>  required:
>    - compatible
>    - reg
> --
> 2.50.1
>