Lenovo Yoga 2 8" 851(f) support [bytcr-rt5640]

[memegauste]

As title says, I will upload today dmesg, I tried newest Linux kernel (5.5) under Arch Linux and also installed UCM files, I have Dummy Output in pavucontrol and in alsamixer I have Intel HDMI LP device without volume control.

I will give more details when I will hit home.

[memegauste]

So, here we are:
https://pastebin.com/MgsbhTzk

This is full DMESG backlog for kernel 5.5.8 on Lenovo Yoga 2 8", sorry for being bit late but you know, I don't had effort and time.

Mostly interesing error is:
intel_sst_acpi 80860F28:00: No matching machine driver found

Does the kernel or my distro (Arch) lack some drivers?

[sofair]

0、I know litter about Arch, I installed Debian 10 to my Lenovo miix2 touchpad a few days ago, its audio works more or less by following this link debian on baytrial, nstalling Linux on a Baytrail tablet

To the audio:

1、please ensure these files exist (they are from package 'libasound2-data', may differ from Linux dists), if not, please check the libasound2-data version or update it.

/usr/share/alsa/ucm/bytcr-rt5640-mono-spk-dmic1-mic/HiFi.conf
/usr/share/alsa/ucm/bytcr-rt5640-mono-spk-dmic1-mic/bytcr-rt5640-mono-spk-dmic1-mic.conf
/usr/share/alsa/ucm/bytcr-rt5640-mono-spk-in1-mic/HiFi.conf
/usr/share/alsa/ucm/bytcr-rt5640-mono-spk-in1-mic/bytcr-rt5640-mono-spk-in1-mic.conf
/usr/share/alsa/ucm/bytcr-rt5640-mono-spk-in3-mic/HiFi.conf
/usr/share/alsa/ucm/bytcr-rt5640-mono-spk-in3-mic/bytcr-rt5640-mono-spk-in3-mic.conf
/usr/share/alsa/ucm/bytcr-rt5640-stereo-spk-dmic1-mic/HiFi.conf
/usr/share/alsa/ucm/bytcr-rt5640-stereo-spk-dmic1-mic/bytcr-rt5640-stereo-spk-dmic1-mic.conf
/usr/share/alsa/ucm/bytcr-rt5640-stereo-spk-in1-mic/HiFi.conf
/usr/share/alsa/ucm/bytcr-rt5640-stereo-spk-in1-mic/bytcr-rt5640-stereo-spk-in1-mic.conf
/usr/share/alsa/ucm/bytcr-rt5640-stereo-spk-in3-mic/HiFi.conf
/usr/share/alsa/ucm/bytcr-rt5640-stereo-spk-in3-mic/bytcr-rt5640-stereo-spk-in3-mic.conf
/usr/share/alsa/ucm/bytcr-rt5640/HiFi.conf
/usr/share/alsa/ucm/bytcr-rt5640/bytcr-rt5640.conf

2、Disable snd_hdmi_lpe_audio kernel module.
echo 'blacklist snd_hdmi_lpe_audio' >> /etc/modprobe.d/50-block-hdmi-audio.conf

[memegauste]

For some reason, when I tried to install sof-firmware but I had error that sof-byt.ri exists in /usr/lib/firmware/intel/sof, so I deleted the file and installed package with pacman - still no audio.

Now if I blacklist module snd_hdmi_lpe_audio pulseaudio does start, if not, it does not, and pavucontrol is trying to connect to pulseaudio service infinite time.

dummy output in the alsamixer is present as default with only Master channel available when module is blacklisted.

EDIT:
This is my pulseaudio log for now:
https://pastebin.com/w0Y2Cj2f
I will try to debug issue later, I'm gonna play mmo for a while 🤓

[memegauste]

Another log:
https://pastebin.com/EWN4jbXZ

For now with clean /etc/pulse/default.pa file.

[memegauste]

Releated issue:
thesofproject/linux#2485