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?
> +
> Example:
>
> hdmicec: cec@100B0000 {
> --
> 2.11.0
>
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