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Date:   Tue, 21 May 2019 01:50:07 +0200
        Maxime Ripard <>,
        Chen-Yu Tsai <>, Rob Herring <>
Cc:     Ondrej Jirman <>, David Airlie <>,
        Daniel Vetter <>,
        Mark Rutland <>,
        Giuseppe Cavallaro <>,
        Alexandre Torgue <>,
        Jose Abreu <>,
        "David S. Miller" <>,
        Maxime Coquelin <>,,,,,,
Subject: [PATCH v5 4/6] dt-bindings: display: hdmi-connector: Support DDC bus enable

From: Ondrej Jirman <>

Some Allwinner SoC using boards (Orange Pi 3 for example) need to enable
on-board voltage shifting logic for the DDC bus using a gpio to be able
to access DDC bus. Use ddc-en-gpios property on the hdmi-connector to
model this.

Add binding documentation for optional ddc-en-gpios property.

Signed-off-by: Ondrej Jirman <>
 .../devicetree/bindings/display/connector/hdmi-connector.txt     | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/display/connector/hdmi-connector.txt b/Documentation/devicetree/bindings/display/connector/hdmi-connector.txt
index 508aee461e0d..aeb07c4bd703 100644
--- a/Documentation/devicetree/bindings/display/connector/hdmi-connector.txt
+++ b/Documentation/devicetree/bindings/display/connector/hdmi-connector.txt
@@ -9,6 +9,7 @@ Optional properties:
 - label: a symbolic name for the connector
 - hpd-gpios: HPD GPIO number
 - ddc-i2c-bus: phandle link to the I2C controller used for DDC EDID probing
+- ddc-en-gpios: signal to enable DDC bus
 Required nodes:
 - Video port for HDMI input

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