From: Hans Verkuil hans.verkuil@cisco.com
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@cisco.com Cc: Krzysztof Kozlowski krzk@kernel.org Cc: Andrzej Hajda a.hajda@samsung.com Cc: devicetree@vger.kernel.org --- 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. + Example:
hdmicec: cec@100B0000 {