linux-kernel - Re: [PATCH 6/7] ARM: dts: r8a7742: Add LVDS support

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Message-ID: <CA+V-a8v0nXwe0iN2ymqE5YgcgOymWYv-Xf6N+rw_nJnUgx4yMQ@mail.gmail.com>
Date:   Sun, 9 Aug 2020 22:29:32 +0100
From:   "Lad, Prabhakar" <prabhakar.csengg@...il.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc:     Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        Kieran Bingham <kieran.bingham+renesas@...asonboard.com>,
        David Airlie <airlied@...ux.ie>,
        Rob Herring <robh+dt@...nel.org>,
        Magnus Damm <magnus.damm@...il.com>,
        Daniel Vetter <daniel@...ll.ch>,
        dri-devel@...ts.freedesktop.org,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        "open list:OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS" 
        <devicetree@...r.kernel.org>
Subject: Re: [PATCH 6/7] ARM: dts: r8a7742: Add LVDS support

Hi Laurent,

Thank you for the review.

On Sat, Aug 8, 2020 at 10:13 PM Laurent Pinchart
<laurent.pinchart@...asonboard.com> wrote:
>
> Hi Prabhakar,
>
> Thank you for the patch.
>
> On Fri, Aug 07, 2020 at 06:49:53PM +0100, Lad Prabhakar wrote:
> > Add LVDS encoder node to r8a7742 SoC DT.
> >
> > Signed-off-by: Lad Prabhakar <prabhakar.mahadev-lad.rj@...renesas.com>
> > Reviewed-by: Marian-Cristian Rotariu <marian-cristian.rotariu.rb@...renesas.com>
> > ---
> >  arch/arm/boot/dts/r8a7742.dtsi | 54 ++++++++++++++++++++++++++++++++++
> >  1 file changed, 54 insertions(+)
> >
> > diff --git a/arch/arm/boot/dts/r8a7742.dtsi b/arch/arm/boot/dts/r8a7742.dtsi
> > index a979a4b3de61..a7e66220d63a 100644
> > --- a/arch/arm/boot/dts/r8a7742.dtsi
> > +++ b/arch/arm/boot/dts/r8a7742.dtsi
> > @@ -1534,11 +1534,65 @@
> >                               port@1 {
> >                                       reg = <1>;
> >                                       du_out_lvds0: endpoint {
> > +                                             remote-endpoint = <&lvds0_in>;
> >                                       };
> >                               };
> >                               port@2 {
> >                                       reg = <2>;
> >                                       du_out_lvds1: endpoint {
> > +                                             remote-endpoint = <&lvds1_in>;
> > +                                     };
> > +                             };
> > +                     };
> > +             };
> > +
> > +             lvds0: lvds@...90000 {
> > +                     compatible = "renesas,r8a7742-lvds";
> > +                     reg = <0 0xfeb90000 0 0x1c>;
>
> Isn't 0x14 enough for the size ? 0x1c won't hurt though. Same comment
> below.
>
Agreed, 0x1c comes from Gen-3 manuals.

Cheers,
Prabhakar

> With or without this addressed,
>
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
>
> > +                     clocks = <&cpg CPG_MOD 726>;
> > +                     power-domains = <&sysc R8A7742_PD_ALWAYS_ON>;
> > +                     resets = <&cpg 726>;
> > +                     status = "disabled";
> > +
> > +                     ports {
> > +                             #address-cells = <1>;
> > +                             #size-cells = <0>;
> > +
> > +                             port@0 {
> > +                                     reg = <0>;
> > +                                     lvds0_in: endpoint {
> > +                                             remote-endpoint = <&du_out_lvds0>;
> > +                                     };
> > +                             };
> > +                             port@1 {
> > +                                     reg = <1>;
> > +                                     lvds0_out: endpoint {
> > +                                     };
> > +                             };
> > +                     };
> > +             };
> > +
> > +             lvds1: lvds@...94000 {
> > +                     compatible = "renesas,r8a7742-lvds";
> > +                     reg = <0 0xfeb94000 0 0x1c>;
> > +                     clocks = <&cpg CPG_MOD 725>;
> > +                     power-domains = <&sysc R8A7742_PD_ALWAYS_ON>;
> > +                     resets = <&cpg 725>;
> > +                     status = "disabled";
> > +
> > +                     ports {
> > +                             #address-cells = <1>;
> > +                             #size-cells = <0>;
> > +
> > +                             port@0 {
> > +                                     reg = <0>;
> > +                                     lvds1_in: endpoint {
> > +                                             remote-endpoint = <&du_out_lvds1>;
> > +                                     };
> > +                             };
> > +                             port@1 {
> > +                                     reg = <1>;
> > +                                     lvds1_out: endpoint {
> >                                       };
> >                               };
> >                       };
>
> --
> Regards,
>
> Laurent Pinchart