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Hi,
I am trying to run playback using the SOF sound card on the IMX8M Plus EVK, but I am not able to hear any audio from the headphone jack.
Here are the steps I am using to run the playback:
- Boot the device and interrupt to enter uboot
- Use "editenv fdtfile" and change the device tree name to "imx8mp-evk-sof-wm8960.dtb"
- Continue the boot
- Run "aplay -l" to obtain SOF sound card ID
- Run the following commands to initiate playback:
- amixer -c [sof_card_id] cset name="Left Output Mixer PCM Playback Switch" on
- amixer -c [sof_card_id] cset name="Right Output Mixer PCM Playback Switch" on
- aplay -Dhw:[sof_card_id],0 [path_to_wav_file]
The wav file used in this case is 32 bit, 48Khz stereo. I see no error when running the playback command.
I have also tried playing the same wav file using the default device tree and the wm8960 sound card, and I am able to hear the output.
Please let me know what I can do to solve this issue.
Hi @aporter28
Did you refer this guide?
SOF User Guide on NXP i.MX8 platforms — SOF Project 2.11.0 documentation
Best Regards,
Zhiming
That worked great, thanks! I am currently just exploring the capabilities of SOF on NXP boards.
Hello @aporter28 ,
On my setup the control you want to modify is named 'Headphone'.
Assuming SOF card number is 0 please try this.
amixer -c 0 sset Headphone 80%
Also you can use the alsamixer TUI and modify the Headphone control
Can you share with us what project are you working on with the Sound Open Firmware?