On Wed, Jun 07, 2017 at 04:46:14PM +0200, Hans Verkuil wrote: > From: Hans Verkuil <hans.verkuil@xxxxxxxxx> > > Needed for boards that wire the CEC pin in such a way that it > is unavailable when the HPD is low. > > Signed-off-by: Hans Verkuil <hans.verkuil@xxxxxxxxx> > Cc: Krzysztof Kozlowski <krzk@xxxxxxxxxx> > Cc: Andrzej Hajda <a.hajda@xxxxxxxxxxx> > Cc: devicetree@xxxxxxxxxxxxxxx > --- > Documentation/devicetree/bindings/media/s5p-cec.txt | 6 ++++++ > 1 file changed, 6 insertions(+) > > diff --git a/Documentation/devicetree/bindings/media/s5p-cec.txt b/Documentation/devicetree/bindings/media/s5p-cec.txt > index 4bb08d9d940b..261af4d1a791 100644 > --- a/Documentation/devicetree/bindings/media/s5p-cec.txt > +++ b/Documentation/devicetree/bindings/media/s5p-cec.txt > @@ -17,6 +17,12 @@ Required properties: > - samsung,syscon-phandle - phandle to the PMU system controller > - hdmi-phandle - phandle to the HDMI controller > > +Optional: > + - needs-hpd : if present the CEC support is only available when the HPD > + is high. Some boards only let the CEC pin through if the HPD is high, for > + example if there is a level converter that uses the HPD to power up > + or down. Seems like something common. Can you document in a common location? > + > Example: > > hdmicec: cec@100B0000 { > -- > 2.11.0 > > _______________________________________________ > dri-devel mailing list > dri-devel@xxxxxxxxxxxxxxxxxxxxx > https://lists.freedesktop.org/mailman/listinfo/dri-devel -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html