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[media] cec-ioc-adap-g-caps.rst: document CEC_CAP_NEEDS_HPD 

Document the new CEC_CAP_NEEDS_HPD capability.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
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Hans Verkuil 2017-06-07 11:46:13 -03:00 committed by Mauro Carvalho Chehab
parent f902c1e95d
commit 41c01d6582
1 changed files with 8 additions and 0 deletions
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Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst
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@ -113,6 +113,14 @@ returns the information to the application. The ioctl never fails.
- 0x00000020
- The CEC hardware can monitor all messages, not just directed and
broadcast messages.
* .. _`CEC-CAP-NEEDS-HPD`:
- ``CEC_CAP_NEEDS_HPD``
- 0x00000040
- The CEC hardware is only active if the HDMI Hotplug Detect pin is
high. This makes it impossible to use CEC to wake up displays that
set the HPD pin low when in standby mode, but keep the CEC bus
alive.