Add binding documentation for HDMI connector's HPD GPIO.

Signed-off-by: Tomi Valkeinen <tomi.valkei...@ti.com>
Cc: devicet...@vger.kernel.org
---
 Documentation/devicetree/bindings/video/hdmi-connector.txt | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/video/hdmi-connector.txt 
b/Documentation/devicetree/bindings/video/hdmi-connector.txt
index ccccc19e2573..acd5668b1ce1 100644
--- a/Documentation/devicetree/bindings/video/hdmi-connector.txt
+++ b/Documentation/devicetree/bindings/video/hdmi-connector.txt
@@ -7,6 +7,7 @@ Required properties:
 
 Optional properties:
 - label: a symbolic name for the connector
+- hpd-gpios: HPD GPIO number
 
 Required nodes:
 - Video port for HDMI input
-- 
1.9.1

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