linux-kernel - Re: [PATCH v4 9/9] arm64: dts: renesas: salvator: add a connection from adv748x codec (HDMI input) to the R-Car SoC

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Date:   Thu, 2 Apr 2020 17:35:05 +0200
From:   Alex Riesen <alexander.riesen@...itec.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     Kieran Bingham <kieran.bingham@...asonboard.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil-cisco@...all.nl>,
        Laurent Pinchart <laurent.pinchart@...asonboard.com>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Kuninori Morimoto <kuninori.morimoto.gx@...esas.com>,
        driverdevel <devel@...verdev.osuosl.org>,
        Linux Media Mailing List <linux-media@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        OPEN FIRMWARE AND FLATTENED DEVICE TREE BINDINGS 
        <devicetree@...r.kernel.org>,
        Linux-Renesas <linux-renesas-soc@...r.kernel.org>
Subject: Re: [PATCH v4 9/9] arm64: dts: renesas: salvator: add a connection
 from adv748x codec (HDMI input) to the R-Car SoC

Geert Uytterhoeven, Thu, Apr 02, 2020 17:26:15 +0200:
> On Thu, Apr 2, 2020 at 5:03 PM Alex Riesen <alexander.riesen@...itec.com> wrote:
> > Geert Uytterhoeven, Mon, Mar 30, 2020 10:32:47 +0200:
> > > On Thu, Mar 26, 2020 at 11:55 AM Alex Riesen <alexander.riesen@...itec.com> wrote:
> > > > --- a/arch/arm64/boot/dts/renesas/salvator-common.dtsi
> > > > +++ b/arch/arm64/boot/dts/renesas/salvator-common.dtsi
> > > > @@ -510,6 +511,15 @@ adv7482_txb: endpoint {
> > > >                                 remote-endpoint = <&csi20_in>;
> > > >                         };
> > > >                 };
> > > > +
> > > > +               port@c {
> > > > +                       reg = <12>;
> > > > +
> > > > +                       adv7482_i2s: endpoint {
> > > > +                               remote-endpoint = <&rsnd_endpoint3>;
> > > > +                               system-clock-direction-out;
> > > > +                       };
> > > > +               };
> > >
> > > As the adv748x driver just ignores "invalid" endpoints...
> > >
> > > > @@ -758,8 +769,19 @@ &rcar_sound {
> > > >                  <&cpg CPG_MOD 1020>, <&cpg CPG_MOD 1021>,
> > > >                  <&cpg CPG_MOD 1019>, <&cpg CPG_MOD 1018>,
> > > >                  <&audio_clk_a>, <&cs2000>,
> > > > -                <&audio_clk_c>,
> > > > +                <&adv7482_hdmi_in>,
> > > >                  <&cpg CPG_CORE CPG_AUDIO_CLK_I>;
> > >
> > > ... and the rsnd driver ignores nonexistent-clocks, the DT change has no
> > > hard dependency on the driver change, and won't introduce regressions
> > > when included, right?
> >
> > Well, it maybe won't, but isn't it a little ... implicit?
> > And I'm no haste to include the changes, if you mean I can (or should) submit
> > the device tree patch separately.
> 
> OK, fine for me to postpone (that'll be for v5.9, I guess?).
> 

Looks scary :)
But yes, fine with me too.

v5 with ssi4 dummy in a moment.

Regards,
Alex