I am currently working on i.MX8M Evaluation kit and came across an issue, where there is audio output only from HDMI and no audio output from jack, when i flash Android binaries onto the Evaluation kit . As per the release note, it is stated that all the audio signals are routed to HDMI when a HDMI monitor is connected to the kit. Similarly when i flash Linux (4.9.88) binaries onto the same Evaluation kit, audio output is only from jack and not from HDMI. Can you please tell which factor is playing a major role on linux platform to get audio output from jack?
Thanks and regards,
This is normal since Alsa is using the audio jack output as default audio card. You need to change this default configuration and select the Audio card that is assigned to the HDMI audio. Using Linux, I made it as below:
$ gplay-1.0 test.mp4 --video-sink="kmssink" --audio-sink='alsasink device="hw:3,0"'
Hope this can help you.