linux-kernel - Re: [PATCH] drm: rcar_du: DRM_RCAR_DU optionally depends on RCAR_MIPI

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Message-ID: <88d5165b-1825-3a71-c8c0-dd5a99cd8bf6@redhat.com>
Date:   Thu, 3 Nov 2022 12:56:56 +0100
From:   Javier Martinez Canillas <javierm@...hat.com>
To:     Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        Randy Dunlap <rdunlap@...radead.org>,
        linux-kernel@...r.kernel.org
Cc:     Laurent Pinchart <laurent.pinchart+renesas@...asonboard.com>,
        dri-devel@...ts.freedesktop.org, linux-renesas-soc@...r.kernel.org,
        Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>,
        LUU HOAI <hoai.luu.ub@...esas.com>
Subject: Re: [PATCH] drm: rcar_du: DRM_RCAR_DU optionally depends on
 RCAR_MIPI_DSI

On 11/3/22 12:53, Javier Martinez Canillas wrote:

[...]

>>
> 
> What this Kconfig expression is saying is that it depends on DRM_RCAR_MIPI_DSI=y
> if DRM_RCAR_DU=y and DRM_RCAR_MIPI_DSI=m if DRM_RCAR_DU=m. But that the it can

It should had been s/and/or here but you get the idea.

> also be satisfied if is not set DRM_RCAR_MIPI_DSI.
> 
> This is usually used to make sure that you don't end with a configuration where
> DRM_RCAR_MIPI_DSI=y and DRM_RCAR_DU=m or DRM_RCAR_MIPI_DSI=m and DRM_RCAR_DU=y.
> 
> Randy, I think that it's more idiomatic though to it express as following:
> 
> depends on DRM_RCAR_MIPI_DSI || !DRM_RCAR_MIPI_DSI
> 

-- 
Best regards,

Javier Martinez Canillas
Core Platforms
Red Hat