dsm_calibration¶
Source code: dsm_calibration.py
A factory test to calibrate the smart speaker amplifier.
Description¶
The test calibrates the smart speaker amplifier by following steps:
1. Play silent music to load DSM module.
2. Enter calibration mode.
3. Wait for 3 seconds to get stable Rdc.
4. Read Rdc values from two speakers.
5. Store result to VPD.
6. Quit calibration mode.
After this test, it is recommended to run RebootStep
to load calibration
data into cras, and run SpeakerDMic
test to verify the calibration result.
This test only works for some smart speaker amplifiers because some vendors don’t want to share their software to public.
Test Procedure¶
This is an automated test without user interaction.
Dependency¶
alsactl-tlv
Device API
cros.factory.device.audio
.Device API
cros.factory.device.vpd
.
Examples¶
To calibrate the speaker device hw:1,0, add this into test list:
{
"pytest_name": "dsm_calibration",
"label": "DSM Calibration",
"related_components": [
"test_tags.TestCategory.SMART_SPEAKER_AMPLIFIER",
"test_tags.TestCategory.VPD"
],
"args": {
"output_dev": [
"eval! device.component.audio_card_name or constants.audio.card_name",
"0"
]
}
}
See audio_loop.py for more details about how to set
output_dev
.
Test Arguments¶
Name |
Type |
Description |
---|---|---|
output_dev |
list |
(optional; default: |
num_output_channels |
int |
(optional; default: |