[PATCH 0/9] Doc/DT: DT bindings for various display components

[Philipp Zabel]

Hi,

Am Freitag, den 28.02.2014, 13:57 +0100 schrieb Sebastian Hesselbarth:
> On 02/28/14 13:20, Tomi Valkeinen wrote:
> > This series is a re-send of
> > http://article.gmane.org/gmane.linux.drivers.devicetree/61739
> >
> ...
> > Shortly about the display components in the series, in the order of probable
> > public interest:
> >
> > * Analog TV, DVI and HDMI Connectors represent a respective connector on the
> >    board. They don't do much, but they do mark the end of the video pipeline (from
> >    the board's pov), and they should also in the future offer ways to handle
> >    things like the +5V pin on DVI and HDMI connector and HPD pin.
> >
> > * MIPI DPI panel and MIPI DSI CM panels represent bindings for simple panels
> >    using the respective video bus.
> >
> > * Sony acx565akm is an SPI controlled panel using flatlink video bus.
> >
> > * TFP410 is a DPI to DVI encoder.
> >
> > * TPD12S015 is a HDMI companion chip, used on OMAP boards.
> 
> Tomi,
> 
> Out of curiosity, will there be DT nodes for pull-up resistors soon,
> too? ;)
>
> Honestly, TPD12S015 is a level shifter, there is nothing in it that
> would justify a DT node nor a driver.
> 
> Above you already note, that connector nodes should offer HPD in the
> future, but I guess the binding should represent that now already.
> I will be a DT stub anyway, the corresponding video sink driver will
> have to look it up.
> 
> Looking through the bindings for DVI and HDMI, I guess HPD gpio is
> better kept in those nodes. From the relevant (DT) properties DVI and
> HDMI connectors are in no way different.

I like the idea of adding actual connector nodes to the board device
trees. A TV encoder driver for example could this way detect from the
device tree whether it is connected to a VGA, Composite, or S-Video
connector (or maybe to both Composite and S-Video connectors at the same
time).

regards
Philipp