Hello, I'm new to the Yocto and Raspberry community, so let me know if I'm doing something wrong please. I am trying to compile with Yocto Kirkstone (also tried newer branches), for a Raspberry Pi CM4 (emmc) + Official IO Board. I chose the Raspberrypi4 machine config, is this the correct one for the CM4 32bits?
I just build the core-image-base with the alsa package. I enabled in local.conf dtparam=audio=on and also dtoverlay=audremap to route the audio to pins 12 and 13 (pwm). This works fine with the official raspberry distro (only Bullseye onwards) but it doesn't work here. With the aplay -L command only the HDMI audio appears, not the headphones. The SO image works fine, it boots and outputs audio via HDMI. I also tried enabling pwm audio with other commands in local.conf like: audio_pwm_mode2 dtoverlay=audremap, pins_12_13 dtoverlay=pwm1 and the same above with pins 40 & 41 also tried running >modprobe snd_bcm2835 I really don't know what else to do, or where else to look for more info. Please tell me if you need me to add more data like dmesg logs etc. Additional details (revisions used, host distro, etc.): rev Kirkstone, Linux 5.15, poky distro, Raspberry pi CM4 with emmc and official IO Board Many thanks for your time.
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