| CEC-COMPLIANCE(1) | User Commands | CEC-COMPLIANCE(1) |
cec-compliance - An application to verify remote CEC devices
cec-compliance [-h] [-d <dev>] [other options]
The cec-compliance utility can be used to test how well remote CEC devices comply with the CEC specification. It can also be used to test the local CEC adapter (with the -A option).
By default it will run through all tests, but if one or more of the feature test options is given, then only those tests will be performed. A set of core tests is always run.
The CEC adapter needs to be configured before it is used to run tests with cec-compliance. Use cec-ctl for configuration.
If the CEC adapter has claimed several logical addresses, the test set is run from each logical address in succession. The remote device needs to report a valid physical address in order to run tests on it.
When running compliance tests, cec-follower should be run on the same adapter. cec-follower will reply to messages that are not handled by cec-compliance. cec-follower will also monitor the device under test for behaviors that are not compliant with the specification. Before each test-run cec-follower should be restarted if it is already running, to initialize the emulated device with a clean and known initial state.
Some tests require interactive mode (with the -i option) to confirm that the test passed. When in interactive mode, the user is asked to observe or perform actions on the remote device. Some tests also give conclusive test results when run in interactive mode.
When testing the local CEC adapter's compliance with the CEC API, there must be at least one remote device present in order to test transmitting and receiving.
The compliance tests can have several possible outcomes besides passing and failing:
OK The test passed.
OK (Unexpected) The test passed, but it was unexpected for the device
under test to support it. This might for example occur
when a TV replies to messages in the Deck Control
feature.
OK (Not Supported) The feature that was tested is not supported by the
device under test, and that feature was not mandatory for
the device to pass.
OK (Presumed) Nothing went wrong during the test, but the test cannot
positively verify that the required effects of the test
occurred. The test runner should verify that the test
passed by manually observing the device under test. This
is typically the test result for tests that send
messages that are not replied to, but which induce some
side effect on the device under test, such as a TV
switching to another input or sending a Remote Control
command.
OK (Refused) The device supports the feature or message being tested,
but responded <Feature Abort> ["Refused"] to indicate
that it cannot perform the given operation. This might
for example occur when trying to test the One Touch
Record feature on a TV with copy protection enabled.
FAIL The test failed and was expected to pass on the device.
Some tests depend on other tests being successful. These are not run if the tests they depend on failed, and they will not be shown in the test listing.
On success, it returns 0. Otherwise, it will return the error code.
We want to test the compliance of a TV when it is interacting with a Playback device. The device node of the CEC adapter which the TV is connected to is /dev/cec1.
The local CEC adapter first needs to be configured as a Playback device, and it must have an appropriate physical address. It is important that the physical address is correct, so as to not confuse the device under test. For example, if the CEC adapter is connected to the first input of the TV, the physical address 1.0.0.0 should generally be used.
cec-ctl -d1 --playback --phys-addr 1.0.0.0
Most CEC adapters will automatically detect the physical address, and for those adapters the --phys-addr option is not needed.
Next, cec-follower also has to be started on the same device:
cec-follower -d1
cec-compliance can now be run towards the TV by supplying the -r option with the logical address 0:
cec-compliance -d1 -r0
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.
| August 2016 | v4l-utils 1.16.3 |