linux-kernel - Re: [PATCH 3/3] ARM: logicpd-torpedo-37xx-devkit-28: Reference new DRM panel

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Date:   Mon, 23 Sep 2019 08:32:11 -0500
From:   Adam Ford <aford173@...il.com>
To:     Sam Ravnborg <sam@...nborg.org>
Cc:     dri-devel@...ts.freedesktop.org,
        Linux-OMAP <linux-omap@...r.kernel.org>,
        Adam Ford <adam.ford@...icpd.com>,
        Thierry Reding <thierry.reding@...il.com>,
        David Airlie <airlied@...ux.ie>,
        Daniel Vetter <daniel@...ll.ch>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        devicetree <devicetree@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] ARM: logicpd-torpedo-37xx-devkit-28: Reference new
 DRM panel

On Sat, Sep 21, 2019 at 2:09 PM Sam Ravnborg <sam@...nborg.org> wrote:
>
> Hi Adam.
>
> On Tue, Sep 17, 2019 at 11:12:13AM -0500, Adam Ford wrote:
> > With the removal of the panel-dpi from the omap drivers, the
> > LCD no longer works.  This patch points the device tree to
> > a newly created panel named "logicpd,type28"
> >
> > Fixes: 8bf4b1621178 ("drm/omap: Remove panel-dpi driver")
> >
> > Signed-off-by: Adam Ford <aford173@...il.com>
> Looks good.
> One nit below.
>
> With this addressed:
>
> Acked-by: Sam Ravnborg <sam@...nborg.org>
>
>         Sam
> >
> > diff --git a/arch/arm/boot/dts/logicpd-torpedo-37xx-devkit-28.dts b/arch/arm/boot/dts/logicpd-torpedo-37xx-devkit-28.dts
> > index 07ac99b9cda6..00c426bd51a0 100644
> > --- a/arch/arm/boot/dts/logicpd-torpedo-37xx-devkit-28.dts
> > +++ b/arch/arm/boot/dts/logicpd-torpedo-37xx-devkit-28.dts
> > @@ -11,22 +11,8 @@
> >  #include "logicpd-torpedo-37xx-devkit.dts"
> >
> >  &lcd0 {
> > -
> > +     /* This isn't the exact LCD, but the timings meet spec */
> > +     /* To make it work, set CONFIG_OMAP2_DSS_MIN_FCK_PER_PCK=4 */
> > +     compatible = "logicpd,type28";
> >       label = "28";
> You left this property - but us it documented and what use has it?

Good catch, I'll remove it and post a V2 today once I can figure out
the yaml stuff.

adam
>
> > -
> > -     panel-timing {
> > -             clock-frequency = <9000000>;
> > -             hactive = <480>;
> > -             vactive = <272>;
> > -             hfront-porch = <3>;
> > -             hback-porch = <2>;
> > -             hsync-len = <42>;
> > -             vback-porch = <3>;
> > -             vfront-porch = <2>;
> > -             vsync-len = <11>;
> > -             hsync-active = <1>;
> > -             vsync-active = <1>;
> > -             de-active = <1>;
> > -             pixelclk-active = <0>;
> > -     };
> >  };
> > --
> > 2.17.1