Hi Jean-François,
On Wednesday 30 Nov 2016 09:12:08 Jean-Francois Moine wrote:
> On Tue, 29 Nov 2016 22:10:01 +0200 Laurent Pinchart wrote:
> > On Tuesday 29 Nov 2016 21:04:55 Jean-Francois Moine wrote:
> >> On Tue, 29 Nov 2016 21:33 +0200 Laurent Pinchart wrote:
> >>>>> You need a third port for the HDMI encoder output, connected to an
> >>>>> HDMI connector DT node.
> >>>>
> >>>> I don't see what you mean. The HDMI device is both the encoder
> >>>
> >>>> and connector (as the TDA998x):
> >>> The driver might create both an encoder and a connector, but I very
> >>> much doubt that the "allwinner,sun8i-a83t-hdmi" hardware contains a
> >>> connector, unless the SoC package has an HDMI connector coming out of
> >>> it :-)
> >>>
> >>>> plane -> DE2 mixer ---> TCON -----> HDMI -----> display device
> >>>> ----- plane ------ - CRTC - - encoder \
> >>>> connector -- (HDMI cable)
> >>>> audio-controller - - audio-codec /
> >>
> >> The schema is the same as the Dove Cubox: the TDA998x is just a chip
> >> with some wires going out and the physical connector is supposed to be
> >> at the end of the wires.
> >
> > I've missed the Dove Cubox DT bindings when they were submitted.
> > Fortunately (or unfortunately for you, depending on how you look at it
> > ;-)) I've paid more attention this time.
> >
> >> Here, the HDMI pins of the SoC go to a pure hardware chip and then to
> >> the physical connector. Which software entity do you want to add?
> >
> > I don't want to add a software entity, I just want to model the connector
> > in DT as it's present in the system. Even though that's more common for
> > other bus types than HDMI (LVDS for instance) it wouldn't be
> > inconceivable to connect the HDMI signals to an on-board chim instead of
> > an HDMI connector, so the HDMI encoder output should be modelled by a
> > port and connected to a connector DT node in this case.
>
> Well, I don't see what this connector can be.
> May you give me a DT example?
Sure.
arch/arm/boot/dts/r8a7791-koelsch.dts
/* HDMI encoder */
hdmi@39 {
compatible = "adi,adv7511w";
reg = <0x39>;
interrupt-parent = <&gpio3>;
interrupts = <29 IRQ_TYPE_LEVEL_LOW>;
adi,input-depth = <8>;
adi,input-colorspace = "rgb";
adi,input-clock = "1x";
adi,input-style = <1>;
adi,input-justification = "evenly";
ports {
#address-cells = <1>;
#size-cells = <0>;
port@0 {
reg = <0>;
adv7511_in: endpoint {
remote-endpoint = <&du_out_rgb>;
};
};
port@1 {
reg = <1>;
adv7511_out: endpoint {
remote-endpoint = <&hdmi_con>;
};
};
};
};
/* HDMI connector */
hdmi-out {
compatible = "hdmi-connector";
type = "a";
port {
hdmi_con: endpoint {
remote-endpoint = <&adv7511_out>;
};
};
};
--
Regards,
Laurent Pinchart
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