[PATCH 1/3] dt-bindings: display: dw_hdmi.txt

Hans Verkuil hverkuil at xs4all.nl
Mon Mar 19 04:43:43 PDT 2018

From: Hans Verkuil <hans.verkuil at cisco.com>

Some boards have both a DesignWare and their own CEC controller.
The CEC pin is only hooked up to their own CEC controller and not
to the DW controller.

Add the cec-disable property to disable the DW CEC controller.

This particular situation happens on Amlogic boards that have their
own meson CEC controller.

Signed-off-by: Hans Verkuil <hans.verkuil at cisco.com>
 Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt b/Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt
index 33bf981fbe33..4a13f4858bc0 100644
--- a/Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt
+++ b/Documentation/devicetree/bindings/display/bridge/dw_hdmi.txt
@@ -27,6 +27,9 @@ responsible for defining whether each property is required or optional.
   - "isfr" is the internal register configuration clock (mandatory).
   - "cec" is the HDMI CEC controller main clock (optional).
+- cec-disable: Do not use the DWC CEC controller since the CEC line is not
+  hooked up even though the CEC DWC IP is present.
 - ports: The connectivity of the DWC HDMI TX with the rest of the system is
   expressed in using ports as specified in the device graph bindings defined
   in Documentation/devicetree/bindings/graph.txt. The numbering of the ports

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