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SubjectRe: [PATCH v3 2/3] arm64: dts: renesas: draak: Describe CVBS input
Hi Laurent,

On Fri, May 18, 2018 at 06:12:15PM +0300, Laurent Pinchart wrote:
> Hi Jacopo,
>
> Thank you for the patch.
>
> On Friday, 18 May 2018 17:47:57 EEST Jacopo Mondi wrote:
> > Describe CVBS video input through analog video decoder ADV7180
> > connected to video input interface VIN4.
> >
> > The video input signal path is shared with HDMI video input, and
> > selected by on-board switches SW-53 and SW-54 with CVBS input selected
> > by the default switches configuration.
> >
> > Signed-off-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
> > Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
> >
> > ---
> > v2 -> v3:
> > - Add comment to describe the shared input video path
> > - Add my SoB and Niklas' R-b tags
> > ---
> > arch/arm64/boot/dts/renesas/r8a77995-draak.dts | 42 +++++++++++++++++++++++
> > 1 file changed, 42 insertions(+)
> >
> > diff --git a/arch/arm64/boot/dts/renesas/r8a77995-draak.dts
> > b/arch/arm64/boot/dts/renesas/r8a77995-draak.dts index 9d73de8..95745fc
> > 100644
> > --- a/arch/arm64/boot/dts/renesas/r8a77995-draak.dts
> > +++ b/arch/arm64/boot/dts/renesas/r8a77995-draak.dts
> > @@ -142,6 +142,11 @@
> > groups = "usb0";
> > function = "usb0";
> > };
> > +
> > + vin4_pins_cvbs: vin4 {
> > + groups = "vin4_data8", "vin4_sync", "vin4_clk";
> > + function = "vin4";
> > + };
> > };
> >
> > &i2c0 {
> > @@ -154,6 +159,23 @@
> > reg = <0x50>;
> > pagesize = <8>;
> > };
> > +
> > + analog-video@20 {
> > + compatible = "adi,adv7180";
> > + reg = <0x20>;
> > +
> > + port {
>
> The adv7180 DT bindings document the output port as 3 or 6 (respectively for
> the CP and ST versions of the chip). You should thus number the port. Apart
> from that the patch looks good.

I admit I have barely copied this from Gen-2 boards DTS, but reading
the driver code and binding description again, I think this is
correct, as the output port numbering and mandatory input port (which
is missing here) only apply to adv7180cp/st chip versions.

Here we describe plain adv7180, no need to number output ports afaict.

Thanks
j

>
> > + /*
> > + * The VIN4 video input path is shared between
> > + * CVBS and HDMI inputs through SW[49-54] switches.
> > + *
> > + * CVBS is the default selection, link it to VIN4 here.
> > + */
> > + adv7180_out: endpoint {
> > + remote-endpoint = <&vin4_in>;
> > + };
> > + };
> > + };
> > };
> >
> > &i2c1 {
> > @@ -246,3 +268,23 @@
> > timeout-sec = <60>;
> > status = "okay";
> > };
> > +
> > +&vin4 {
> > + pinctrl-0 = <&vin4_pins_cvbs>;
> > + pinctrl-names = "default";
> > +
> > + status = "okay";
> > +
> > + ports {
> > + #address-cells = <1>;
> > + #size-cells = <0>;
> > +
> > + port@0 {
> > + reg = <0>;
> > +
> > + vin4_in: endpoint {
> > + remote-endpoint = <&adv7180_out>;
> > + };
> > + };
> > + };
> > +};
>
> --
> Regards,
>
> Laurent Pinchart
>
>
>
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