linux-kernel - Re: [PATCH v5 3/4] dt-bindings: display: bridge: renesas,dsi: Add support for RZ/V2H(P) SoC

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Message-ID: <CAMuHMdU__dxi4wvS3ikBQefM7uwWWK0bCcHv=TL-Td678pEi9Q@mail.gmail.com>
Date: Fri, 23 May 2025 16:58:28 +0200
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Prabhakar <prabhakar.csengg@...il.com>
Cc: Andrzej Hajda <andrzej.hajda@...el.com>, Neil Armstrong <neil.armstrong@...aro.org>, 
	Robert Foss <rfoss@...nel.org>, Laurent Pinchart <Laurent.pinchart@...asonboard.com>, 
	Jonas Karlman <jonas@...boo.se>, Jernej Skrabec <jernej.skrabec@...il.com>, 
	David Airlie <airlied@...il.com>, Simona Vetter <simona@...ll.ch>, 
	Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, Maxime Ripard <mripard@...nel.org>, 
	Thomas Zimmermann <tzimmermann@...e.de>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>, 
	Biju Das <biju.das.jz@...renesas.com>, Magnus Damm <magnus.damm@...il.com>, 
	dri-devel@...ts.freedesktop.org, devicetree@...r.kernel.org, 
	linux-kernel@...r.kernel.org, linux-renesas-soc@...r.kernel.org, 
	linux-clk@...r.kernel.org, Fabrizio Castro <fabrizio.castro.jz@...esas.com>, 
	Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>, 
	Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
Subject: Re: [PATCH v5 3/4] dt-bindings: display: bridge: renesas,dsi: Add
 support for RZ/V2H(P) SoC

Hi Prabhakar,

On Mon, 12 May 2025 at 20:43, Prabhakar <prabhakar.csengg@...il.com> wrote:
> From: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
>
> The MIPI DSI interface on the RZ/V2H(P) SoC is nearly identical to that of
> the RZ/G2L SoC. While the LINK registers are the same for both SoCs, the
> D-PHY registers differ. Additionally, the number of resets for DSI on
> RZ/V2H(P) is two compared to three on the RZ/G2L.
>
> To accommodate these differences, a SoC-specific
> `renesas,r9a09g057-mipi-dsi` compatible string has been added for the
> RZ/V2H(P) SoC.
>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Thanks for your patch!

> --- a/Documentation/devicetree/bindings/display/bridge/renesas,dsi.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/renesas,dsi.yaml
> @@ -14,16 +14,17 @@ description: |
>    RZ/G2L alike family of SoC's. The encoder can operate in DSI mode, with
>    up to four data lanes.
>
> -allOf:
> -  - $ref: /schemas/display/dsi-controller.yaml#
> -
>  properties:
>    compatible:
> -    items:
> +    oneOf:
>        - enum:
> -          - renesas,r9a07g044-mipi-dsi # RZ/G2{L,LC}
> -          - renesas,r9a07g054-mipi-dsi # RZ/V2L
> -      - const: renesas,rzg2l-mipi-dsi
> +          - renesas,r9a09g057-mipi-dsi # RZ/V2H(P)

Nit: I would add the new entry after all the old entries, to preserve
sort order (by part number).

> +
> +      - items:
> +          - enum:
> +              - renesas,r9a07g044-mipi-dsi # RZ/G2{L,LC}
> +              - renesas,r9a07g054-mipi-dsi # RZ/V2L
> +          - const: renesas,rzg2l-mipi-dsi
>
>    reg:
>      maxItems: 1

The rest LGTM, so
Reviewed-by: Geert Uytterhoeven <geert+renesas@...der.be>

Gr{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds