On Fri, Jun 9, 2017 at 9:11 AM, Hans Verkuil <[email protected]> wrote: > On 09/06/17 16:07, Rob Herring wrote: >> On Wed, Jun 07, 2017 at 04:46:14PM +0200, Hans Verkuil wrote: >>> From: Hans Verkuil <[email protected]> >>> >>> 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 <[email protected]> >>> Cc: Krzysztof Kozlowski <[email protected]> >>> Cc: Andrzej Hajda <[email protected]> >>> Cc: [email protected] >>> --- >>> 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? > > Should we do the same with hdmi-phandle? It is also used by CEC drivers to > find > the HDMI driver.
Yes. > Currently only used by s5p-cec and stih-cec, but there will be more. > > I guess this would be a sensible place to document this: > > Documentation/devicetree/bindings/media/cec.txt Sounds good. You can do this as a follow-up to this patch if you want. For this one: Acked-by: Rob Herring <[email protected]> _______________________________________________ dri-devel mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/dri-devel
