Provided by: v4l-utils_1.26.1-4build3_amd64 
NAME
cec-ctl - An application to control cec devices
SYNOPSIS
cec-ctl [-h] [-d <dev>] [many other options]
DESCRIPTION
The cec-ctl tool is used to control cec devices. It is able to control almost any aspect of such devices
covering the full CEC API.
The easiest way to quickly test a CEC adapter of an HDMI output is:
cec-ctl -d/dev/cecX --playback -S
This is what you would use if the HDMI output of your device supports CEC: your device will play back
video, so it is a CEC Playback device.
And for an HDMI input:
cec-ctl -d/dev/cecX --tv -S
This is what you would use if your device has an HDMI input, i.e. it acts like a TV.
Both commands configure the CEC adapter and show the CEC topology. The '--playback' and '--tv' options
configure your device, they are not about what device you will be talking to.
To put a display to standby use:
cec-ctl -d/dev/cecX --to 0 --standby
To wake up the display:
cec-ctl -d/dev/cecX --to 0 --image-view-on
To switch the TV to our HDMI output (replace the physical address with what cec-ctl -d/dev/cecX
reported):
cec-ctl -d/dev/cecX --to 0 --active-source phys-addr=1.0.0.0
Instead of '-d/dev/cecX' you can also write this as '-dX'. And instead of '--to 0' you can also write
this as '-t0'.
OPTIONS
-d, --device <dev>
Use device <dev> as the CEC device. If <dev> is a number, then /dev/cec<dev> is used.
-D, --driver <drv>
Use a cec device that has driver name <drv>, as returned by the CEC_ADAP_G_CAPS ioctl. This
option can be combined with -a to uniquely identify a CEC device without having to rely on the
device node number.
-a, --adapter <adap-name>
Use a cec device that has adapter name <adap-name>, as returned by the CEC_ADAP_G_CAPS ioctl.
This option can be combined with -D to uniquely identify a CEC device without having to rely on
the device node number.
-v, --verbose
Turn on verbose reporting.
--version
Show version information.
-w, --wall-clock
Show timestamps as wall-clock time. This also turns on verbose reporting.
-h, --help
Prints the help message.
-p, --phys-addr <addr>
Use this physical address. The address can be a number (e.g. 0 or 0x11b1) or formatted as a.b.c.d
where each component is a hex value from 0-f (e.g. 0.0.0.0 or 1.1.b.1).
-e, --phys-addr-from-edid <path>
Parse the given EDID file (in raw binary format) and extract the physical address. If the EDID
file does not exist or does not contain a physical address, then invalidate the physical address.
-E, --phys-addr-from-edid-poll <path>
Parse the given EDID file (in raw binary format) and extract the physical address. If the EDID
file does not exist or does not contain a physical address, then invalidate the physical address.
Poll for changes in this EDID file every 100 ms and, if changed, update the physical address.
This provides a way for Pulse-Eight (or similar) USB CEC dongles to become aware of HDMI
disconnect and reconnect events.
Polling happens in the background while cec-ctl processes other requested actions (i.e.
transmitting messages, waiting for replies, etc.) and when that is all done cec-ctl will keep
polling until the user kills cec-ctl (Ctrl-C).
-o, --osd-name <name>
Use this OSD name. The maximum length is 14 characters.
-V, --vendor-id <id>
Use this vendor ID. The vendor ID is a number from 0x0 to 0xffffff.
-l, --logical-address
Show first configured logical address or nothing if the device is unconfigured. Useful for
scripts, e.g.: la=`cec-ctl -s -l`
-L, --logical-addresses
Show all configured logical addresses or nothing if the device is unconfigured. Useful for
scripts, e.g.: las=`cec-ctl -s -L`
-C, --clear
Clear all logical addresses, leaving the CEC device unconfigured.
-n, --no-reply
By default when sending a CEC message that expects a reply this utility will wait for that reply.
With this option it will just send it without waiting for the reply. This option applies to the
messages following this option. It acts as a toggle, so after you specify it a second time then
the following messages will wait for a reply again.
-N, --non-blocking
Transmit messages in non-blocking mode.
-t, --to <la>
Send the message to the given logical address (0-15).
-f, --from <la>
Send message from the given logical address. It is only necessary to use this option if multiple
logical addresses are claimed. By default the first assigned logical address will be used.
-r, --show-raw
Show the raw CEC message in hex.
-s, --skip-info
Skip the Driver Info output section.
-S, --show-topology
Show the CEC topology, detecting which other CEC devices are on the CEC bus.
-P, --poll
Send a poll message.
-T, --trace
Trace all called ioctls. Useful for debugging.
--cec-version-1.4
Use CEC Version 1.4 instead of 2.0 (the default).
--allow-unreg-fallback
Allow fallback to Unregistered if all logical addresses are claimed. By default the adapter will
remain unconfigured.
--no-rc-passthrough
Disable the RC passthrough. By default remote control CEC messages are passed on as input
keystrokes (the CEC_LOG_ADDRS_FL_ALLOW_RC_PASSTHRU flag is set when calling the
CEC_ADAP_S_LOG_ADDRS ioctl), but this can be blocked by using this option.
--reply-to-followers
The reply will be sent to followers as well. By default the reply will only go to the follower
that initiated the CEC message. But if you have other followers running as well, then by giving
this option they will also receive the reply.
--timeout <ms>
Set the reply timeout in milliseconds (default is 1000 ms).
--tv Configure the CEC adapter as a TV.
--record
Configure the CEC adapter as a recording and playback device.
--tuner
Configure the CEC adapter as a tuner device.
--playback
Configure the CEC adapter as a playback device.
--audio
Configure the CEC adapter as an audio system device.
--processor
Configure the CEC adapter as a processor device.
--switch
Configure the CEC adapter as a pure CEC switch.
--cdc-only
Configure the CEC adapter as a CDC-only device.
--unregistered
Configure the CEC adapter as an unregistered device.
--feat-record-tv-screen
Signal the Record TV Screen feature.
--feat-set-osd-string
Signal the Set OSD String feature.
--feat-deck-control
Signal the Deck Control feature.
--feat-set-audio-rate
Signal the Set Audio Rate feature.
--feat-sink-has-arc-tx
Signal the sink ARC Tx feature.
--feat-source-has-arc-rx
Signal the source ARC Rx feature.
--rc-tv-profile-1
Signal RC TV Profile 1.
--rc-tv-profile-2
Signal RC TV Profile 2.
--rc-tv-profile-3
Signal RC TV Profile 3.
--rc-tv-profile-4
Signal RC TV Profile 4.
--rc-src-dev-root
Signal that the RC source has a Dev Root Menu.
--rc-src-dev-setup
Signal that the RC source has a Dev Setup Menu.
--rc-src-contents
Signal that the RC source has a Contents Menu.
--rc-src-media-top
Signal that the RC source has a Media Top Menu.
--rc-src-media-context
Signal that the RC source has a Media Context Menu.
-m, --monitor
Start monitoring CEC traffic. This will monitor broadcast messages, messages directed to this CEC
adapter and messages transmitted by this CEC adapter. Directed messages between other CEC devices
are not monitored. This option requires root.
-M, --monitor-all
Start monitoring all CEC traffic. This will monitor all CEC messages, including directed messages
between other CEC devices. This option requires root. Not all CEC devices support this monitoring
mode. It will fallback to regular monitoring mode if it is not supported.
--monitor-pin
Start monitoring and analyzing the low-level CEC pin transitions. This is only possible if the
device has the CEC_CAP_MONITOR_PIN capability. This option requires root. When in pin monitoring
mode all 0->1 and 1->0 CEC pin transitions are monitored and analysed. This is effectively a cheap
CEC bus analyzer.
--monitor-time <secs>
Monitor for the given number of seconds, then exit. The default (0) is to monitor forever.
--ignore <la>,<opcode>
Ignore messages from logical address <la> and opcode <opcode> when monitoring. "all" can be used
for <la> or <opcode> to match all logical addresses or opcodes. To ignore poll messages use
"poll" as <opcode>.
--store-pin <to>
Store the CEC pin events to the given file. This can be read and analyzed later via the
--analyze-pin option. Use - to write to stdout instead of to a file.
--analyze-pin <from>
Read and analyze the CEC pin events from the given file. Use - to read from stdin instead of from
a file.
--test-standby-wakeup-cycle [polls=<n>][,sleep=<secs>][,hpd-may-be-low=<0/1>]
This option tests the standby-wakeup cycle behavior of the display. It polls up to <n> times
(default 15), waiting for a state change. If that fails then it waits <secs> seconds (default 10)
before retrying this. If <hpd-may-be-low> is 1, then the HPD is allowed to be low when in
standby.
--stress-test-standby-wakeup-cycle cnt=<count>[,polls=<n>][,max-sleep=<maxsecs>][,min-
sleep=<minsecs>][,seed=<seed>][,repeats=<reps>][,sleep-before-on=<secs1>][,sleep-before-
off=<secs2>][,hpd-may-be-low=<0/1>]
This option performs a stress test for a display: it cycles the display <count> times in and out
of standby using the CEC Standby and Image View On commands. If <count> is 0, then never stop.
It polls up to <n> times (default 30), waiting for a state change. If <maxsecs> is non-zero (0 is
the default), then sleep for a random number of seconds between <minsecs> (0 is the default) and
<maxsecs> before each <Standby> or <Image View On> message. If <seed> is specified, then set the
randomizer seed to that value instead of using the current time as seed. If <reps> is specified,
then repeat the <Image View On> and <Standby> up to <reps> times. Note that this test should work
without any repeats. If a non-zero <reps> value is needed in order to pass this test, then that
indicates a problem. If <secs1> is specified, then sleep for <secs1> seconds before transmitting
<Image View On>. If <secs2> is specified, then sleep for <secs2> seconds before transmitting
<Standby>. If <hpd-may-be-low> is 1, then the HPD is allowed to be low when in standby.
--stress-test-random-standby-wakeup-cycle cnt=<count>[,max-sleep=<maxsecs>][,min-
sleep=<minsecs>][,seed=<seed>][,hpd-may-be-low=<0/1>]
This option performs a stress test for a display: it cycles the display <count> times in and out
of standby using the CEC Standby and Image View On commands. After each command wait between
<minsecs> (default is 0) and <maxsecs> (default is 10) seconds. This test does not check if the
display reached the new state, this test is meant to check if the display can handle state change
commands while still transitioning to a new state. After every 10 cycles it attempts to properly
wake up the display and check if that works. If not, this test fails. If <count> is 0, then never
stop. If <seed> is specified, then set the randomizer seed to that value instead of using the
current time as seed. If <hpd-may-be-low> is 1, then the HPD is allowed to be low when in
standby.
--help-all
Prints the help message for all options.
--help-audio-rate-control
Show help for the Audio Rate Control feature.
--help-audio-return-channel-control
Show help for the Audio Return Channel Control feature.
--help-capability-discovery-and-control
Show help for the Capability Discovery and Control feature.
--help-deck-control
Show help for the Deck Control feature.
--help-device-menu-control
Show help for the Device Menu Control feature.
--help-device-osd-transfer
Show help for the Device OSD Transfer feature.
--help-dynamic-audio-lipsync
Show help for the Dynamic Audio Lipsync feature.
--help-htng
Show help for the Hospitality Profile Next Generation feature. This is an optional CEC extension
for Hotel displays and is not generally available for regular displays. See http://www.htng.org
for more information.
--help-osd-display
Show help for the OSD Display feature.
--help-one-touch-play
Show help for the One Touch Play feature.
--help-one-touch-record
Show help for the One Touch Record feature.
--help-power-status
Show help for the Power Status feature.
--help-remote-control-passthrough
Show help for the Remote Control Passthrough feature.
--help-routing-control
Show help for the Routing Control feature.
--help-standby
Show help for the Standby feature.
--help-system-audio-control
Show help for the System Audio Control feature.
--help-system-information
Show help for the System Information feature.
--help-timer-programming
Show help for the Timer Programming feature.
--help-tuner-control
Show help for the Tuner Control feature.
--help-vendor-specific-commands
Show help for the Vendor Specific Commands feature.
EXIT STATUS
On success, it returns 0. Otherwise, it will return the error code.
BUGS
This manual page is a work in progress.
Bug reports or questions about this utility should be sent to the linux-media@vger.kernel.org
mailinglist.
v4l-utils August 2016 CEC-CTL(1)