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-rw-r--r--Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst8
1 files changed, 8 insertions, 0 deletions
diff --git a/Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst b/Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst
index a0e961f11017..6d7bf7bef3eb 100644
--- a/Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst
+++ b/Documentation/media/uapi/cec/cec-ioc-adap-g-caps.rst
@@ -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.
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