linux-kernel - Re: [PATCH v2 01/19] dt-bindings: display: renesas,cmm: Add R-Car CMM documentation

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Message-ID: <CAMuHMdWVzm8yoZSoKZh3MJsaX4jCRXQCbn2x2LAu4UWtb1yYjw@mail.gmail.com>
Date:   Mon, 8 Jul 2019 09:58:27 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Jacopo Mondi <jacopo+renesas@...ndi.org>
Cc:     Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Koji Matsuoka <koji.matsuoka.xm@...esas.com>, muroya@....co.jp,
        VenkataRajesh.Kalakodima@...bosch.com,
        Harsha.ManjulaMallikarjun@...bosch.com,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        DRI Development <dri-devel@...ts.freedesktop.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v2 01/19] dt-bindings: display: renesas,cmm: Add R-Car CMM documentation

Hi Jacopo,

On Sat, Jul 6, 2019 at 4:07 PM Jacopo Mondi <jacopo+renesas@...ndi.org> wrote:
> Add device tree bindings documentation for the Renesas R-Car Display
> Unit Color Management Module.
>
> CMM is the image enhancement module available on each R-Car DU video
> channel on R-Car Gen2 and Gen3 SoCs (V3H and V3M excluded).
>
> Signed-off-by: Jacopo Mondi <jacopo+renesas@...ndi.org>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>

Thanks for your patch!

> --- /dev/null
> +++ b/Documentation/devicetree/bindings/display/renesas,cmm.txt
> @@ -0,0 +1,25 @@
> +* Renesas R-Car Color Management Module (CMM)
> +
> +Renesas R-Car image enhancement module connected to R-Car DU video channels.
> +
> +Required properties:
> + - compatible: shall be one of:
> +   - "renesas,rcar-gen3-cmm"
> +   - "renesas,rcar-gen2-cmm"

Why do you think you do not need SoC-specific compatible values?
What if you discover a different across the R-Car Gen3 line tomorrow?
Does the IP block have a version register?

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