linux-kernel - Re: [PATCH 06/17] dt-bindings: display: bridge: renesas,dsi: Add support for RZ/V2H(P) SoC

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Message-ID: <20250331-unselfish-spiffy-cobra-a36c7f@krzk-bin>
Date: Mon, 31 Mar 2025 10:25:59 +0200
From: Krzysztof Kozlowski <krzk@...nel.org>
To: Prabhakar <prabhakar.csengg@...il.com>
Cc: Geert Uytterhoeven <geert+renesas@...der.be>, 
	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>, 
	Biju Das <biju.das.jz@...renesas.com>, Mauro Carvalho Chehab <mchehab@...nel.org>, 
	Kieran Bingham <kieran.bingham+renesas@...asonboard.com>, Stephen Boyd <sboyd@...nel.org>, 
	Philipp Zabel <p.zabel@...gutronix.de>, devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-renesas-soc@...r.kernel.org, linux-media@...r.kernel.org, linux-clk@...r.kernel.org, 
	Fabrizio Castro <fabrizio.castro.jz@...esas.com>, Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
Subject: Re: [PATCH 06/17] dt-bindings: display: bridge: renesas,dsi: Add
 support for RZ/V2H(P) SoC

On Sun, Mar 30, 2025 at 10:07:02PM +0100, Prabhakar 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>
> ---
>  .../bindings/display/bridge/renesas,dsi.yaml  | 117 +++++++++++++-----
>  1 file changed, 87 insertions(+), 30 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/display/bridge/renesas,dsi.yaml b/Documentation/devicetree/bindings/display/bridge/renesas,dsi.yaml
> index e08c24633926..501239f7adab 100644
> --- a/Documentation/devicetree/bindings/display/bridge/renesas,dsi.yaml
> +++ b/Documentation/devicetree/bindings/display/bridge/renesas,dsi.yaml
> @@ -14,16 +14,16 @@ 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:
> -      - enum:
> -          - renesas,r9a07g044-mipi-dsi # RZ/G2{L,LC}
> -          - renesas,r9a07g054-mipi-dsi # RZ/V2L
> -      - const: renesas,rzg2l-mipi-dsi
> +    oneOf:
> +      - items:
> +          - enum:
> +              - renesas,r9a07g044-mipi-dsi # RZ/G2{L,LC}
> +              - renesas,r9a07g054-mipi-dsi # RZ/V2L
> +          - const: renesas,rzg2l-mipi-dsi
> +
> +      - const: renesas,r9a09g057-mipi-dsi # RZ/V2H(P)

I guess this will grow, so just use enum here. Otherwise people keep
adding const every time they add new model.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>

Best regards,
Krzysztof