[PATCH v2 00/10] R-Car DU: LVDS dual-link mode support

[Geert Uytterhoeven]

Hi Laurent,

On Sat, May 11, 2019 at 11:07 PM Laurent Pinchart
<laurent.pinchart+renesas at ideasonboard.com> wrote:
> On the receiving side, the THC63LVD1024 LVDS-to-parallel bridge has two
> LVDS inputs and two parallel outputs. It can operate in four different
> modes:
>
> - Single-in, single-out: The first LVDS input receives the video stream,
>   and the bridge outputs it on the first parallel output. The second
>   LVDS input and the second parallel output are not used.
>
> - Single-in, dual-out: The first LVDS input receives the video stream,
>   and the bridge splits even- and odd-numbered pixels and outputs them
>   on the first and second parallel outputs. The second LVDS input is not
>   used.
>
> - Dual-in, single-out: The two LVDS inputs are used in dual-link mode,
>   and the bridge combines the even- and odd-numbered pixels and outputs
>   them on the first parallel output. The second parallel output is not
>   used.
>
> - Dual-in, dual-out: The two LVDS inputs are used in dual-link mode,
>   and the bridge outputs the even- and odd-numbered pixels on the first
>   parallel output.

and the second?

> The operating mode is selected by two input pins of the bridge, which
> are connected to DIP switches on the development boards I use. The mode
> is thus fixed from a Linux point of view.

Can the state of these switches be read from software?

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert at linux-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