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From:   Geert Uytterhoeven <geert@linux-m68k.org>
Date:   Thu, 13 Aug 2020 11:05:14 +0200
Message-ID: <CAMuHMdV4Tp=kz57pAJk0u5hVpbiEdVzTWDvK+F1AZ5TjGmLbMQ@mail.gmail.com>
Subject: Re: [PATCH 1/9] dt-bindings: display: renesas,du: Document r8a774e1 bindings
To:     Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>,
        Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>,
        Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
Cc:     David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
        Rob Herring <robh+dt@kernel.org>,
        Magnus Damm <magnus.damm@gmail.com>,
        DRI Development <dri-devel@lists.freedesktop.org>,
        Linux-Renesas <linux-renesas-soc@vger.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Prabhakar <prabhakar.csengg@gmail.com>,
        Marian-Cristian Rotariu 
        <marian-cristian.rotariu.rb@bp.renesas.com>
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Hi Prabhakar, Laurent, Kieran,

On Wed, Aug 12, 2020 at 4:02 PM Lad Prabhakar
<prabhakar.mahadev-lad.rj@bp.renesas.com> wrote:
> From: Marian-Cristian Rotariu <marian-cristian.rotariu.rb@bp.renesas.com>
>
> Document the RZ/G2H (a.k.a. r8a774e1) SoC in the R-Car DU bindings.
>
> Signed-off-by: Marian-Cristian Rotariu <marian-cristian.rotariu.rb@bp.renesas.com>
> Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@bp.renesas.com>
> ---
>  Documentation/devicetree/bindings/display/renesas,du.txt | 2 ++
>  1 file changed, 2 insertions(+)
>
> diff --git a/Documentation/devicetree/bindings/display/renesas,du.txt b/Documentation/devicetree/bindings/display/renesas,du.txt
> index 51cd4d162770..67cded5ad827 100644
> --- a/Documentation/devicetree/bindings/display/renesas,du.txt
> +++ b/Documentation/devicetree/bindings/display/renesas,du.txt
> @@ -10,6 +10,7 @@ Required Properties:
>      - "renesas,du-r8a774a1" for R8A774A1 (RZ/G2M) compatible DU
>      - "renesas,du-r8a774b1" for R8A774B1 (RZ/G2N) compatible DU
>      - "renesas,du-r8a774c0" for R8A774C0 (RZ/G2E) compatible DU
> +    - "renesas,du-r8a774e1" for R8A774E1 (RZ/G2H) compatible DU
>      - "renesas,du-r8a7779" for R8A7779 (R-Car H1) compatible DU
>      - "renesas,du-r8a7790" for R8A7790 (R-Car H2) compatible DU
>      - "renesas,du-r8a7791" for R8A7791 (R-Car M2-W) compatible DU
> @@ -75,6 +76,7 @@ corresponding to each DU output.
>   R8A774A1 (RZ/G2M)      DPAD 0         HDMI 0         LVDS 0         -
>   R8A774B1 (RZ/G2N)      DPAD 0         HDMI 0         LVDS 0         -
>   R8A774C0 (RZ/G2E)      DPAD 0         LVDS 0         LVDS 1         -
> + R8A774E1 (RZ/G2H)      DPAD 0         HDMI 0         LVDS 0         -

As LVDS 0 is the fourth channel (DU3), should it be listed under port 3
instead of port 2?

I know we did it the same for R-Car M3-N and RZ/G2N.
But my main worry is adding support for R-Car H3-N later.

>   R8A7779 (R-Car H1)     DPAD 0         DPAD 1         -              -
>   R8A7790 (R-Car H2)     DPAD 0         LVDS 0         LVDS 1         -
>   R8A7791 (R-Car M2-W)   DPAD 0         LVDS 0         -              -

Apart from that:
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>

{oetje,eeting}s,

                        Geert

-- 
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-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