linux-kernel - Re: [PATCH v8 04/16] media: cadence: Add support for TI SoCs

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Date:   Sat, 5 Aug 2023 23:06:43 +0200
From:   Krzysztof Kozlowski <krzysztof.kozlowski@...aro.org>
To:     Jai Luthra <j-luthra@...com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Sakari Ailus <sakari.ailus@...ux.intel.com>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Cc:     linux-media@...r.kernel.org, linux-kernel@...r.kernel.org,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        Mauro Carvalho Chehab <mchehab+samsung@...nel.org>,
        Maxime Ripard <mripard@...nel.org>,
        niklas.soderlund+renesas@...natech.se,
        Benoit Parrot <bparrot@...com>,
        Vaishnav Achath <vaishnav.a@...com>,
        Vignesh Raghavendra <vigneshr@...com>, nm@...com,
        devarsht@...com
Subject: Re: [PATCH v8 04/16] media: cadence: Add support for TI SoCs

On 31/07/2023 10:29, Jai Luthra wrote:
> Multiple TI SoCs (J721E, AM62) use this CSI2RX receiver, integrated with
> an external DPHY and a pixel-grabber IP that unwraps the pixel data and
> send it to memory via DMA.
> 
> Add a separate compatible for the TI-specific version of this IP.
> 
> Signed-off-by: Jai Luthra <j-luthra@...com>
> ---
> New in v8
> 
>  drivers/media/platform/cadence/cdns-csi2rx.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/drivers/media/platform/cadence/cdns-csi2rx.c b/drivers/media/platform/cadence/cdns-csi2rx.c
> index 0d879d71d818..b087583d636f 100644
> --- a/drivers/media/platform/cadence/cdns-csi2rx.c
> +++ b/drivers/media/platform/cadence/cdns-csi2rx.c
> @@ -559,6 +559,7 @@ static void csi2rx_remove(struct platform_device *pdev)
>  
>  static const struct of_device_id csi2rx_of_table[] = {
>  	{ .compatible = "starfive,jh7110-csi2rx" },
> +	{ .compatible = "ti,j721e-csi2rx" },

Why do you need it? It's redundant - already compatible with cdns. No
need to add empty match entries.

>  	{ .compatible = "cdns,csi2rx" },
>  	{ },


Best regards,
Krzysztof