linux-kernel - Re: [PATCH 2/9] dt-bindings: display: renesas,du: Add r8a779h0

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Message-ID: <CAMuHMdVZui9c4X0FQ3Xke4gzxa9gvs6Nsp0eh5avzr_G3wd=ig@mail.gmail.com>
Date: Tue, 3 Dec 2024 09:38:44 +0100
From: Geert Uytterhoeven <geert@...ux-m68k.org>
To: Laurent Pinchart <laurent.pinchart@...asonboard.com>
Cc: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>, 
	Kieran Bingham <kieran.bingham+renesas@...asonboard.com>, 
	Andrzej Hajda <andrzej.hajda@...el.com>, Neil Armstrong <neil.armstrong@...aro.org>, 
	Robert Foss <rfoss@...nel.org>, Jonas Karlman <jonas@...boo.se>, 
	Jernej Skrabec <jernej.skrabec@...il.com>, David Airlie <airlied@...il.com>, 
	Simona Vetter <simona@...ll.ch>, Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>, 
	Maxime Ripard <mripard@...nel.org>, Thomas Zimmermann <tzimmermann@...e.de>, Rob Herring <robh@...nel.org>, 
	Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley <conor+dt@...nel.org>, 
	Geert Uytterhoeven <geert+renesas@...der.be>, Magnus Damm <magnus.damm@...il.com>, 
	Michael Turquette <mturquette@...libre.com>, Stephen Boyd <sboyd@...nel.org>, 
	LUU HOAI <hoai.luu.ub@...esas.com>, Jagan Teki <jagan@...rulasolutions.com>, 
	Sam Ravnborg <sam@...nborg.org>, Biju Das <biju.das.jz@...renesas.com>, 
	dri-devel@...ts.freedesktop.org, linux-renesas-soc@...r.kernel.org, 
	devicetree@...r.kernel.org, linux-kernel@...r.kernel.org, 
	linux-clk@...r.kernel.org, 
	Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>
Subject: Re: [PATCH 2/9] dt-bindings: display: renesas,du: Add r8a779h0

Hi Laurent,

On Tue, Dec 3, 2024 at 9:19 AM Laurent Pinchart
<laurent.pinchart@...asonboard.com> wrote:
> On Tue, Dec 03, 2024 at 10:01:36AM +0200, Tomi Valkeinen wrote:
> > From: Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>
> >
> > Extend the Renesas DU display bindings to support the r8a779h0 V4M.
> >
> > Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@...asonboard.com>
> > ---
> >  Documentation/devicetree/bindings/display/renesas,du.yaml | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/Documentation/devicetree/bindings/display/renesas,du.yaml b/Documentation/devicetree/bindings/display/renesas,du.yaml
> > index c5b9e6812bce..d369953f16f7 100644
> > --- a/Documentation/devicetree/bindings/display/renesas,du.yaml
> > +++ b/Documentation/devicetree/bindings/display/renesas,du.yaml
> > @@ -41,6 +41,7 @@ properties:
> >        - renesas,du-r8a77995 # for R-Car D3 compatible DU
> >        - renesas,du-r8a779a0 # for R-Car V3U compatible DU
> >        - renesas,du-r8a779g0 # for R-Car V4H compatible DU
> > +      - renesas,du-r8a779h0 # for R-Car V4M compatible DU
> >
> >    reg:
> >      maxItems: 1
>
> You also need to add h0 to the g0 block in the conditional properties
> below. With that,

Which is not sufficient, as the DU on R-Car V4M has only a single channel,
unlike on R-Car V3U and V4H.

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