Vladyslav Shtabovenko has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/45693 )
Change subject: [TEST] lenovo/t440p: Add HDA verbs from OEM firmware ......................................................................
Patch Set 1: Code-Review+1
Dear Iru Cai,
thank you so much for this patch! I've just applied it on top of the current master, rebuilt my T440p BIOS and voilà, the headphone jack is now working 😄 🎉
I have a fresh Ubuntu 20.04 installed on the machine and the jack was not working with my previous coreboot BIOS from the current master. After having cherry-picked your patch, the magic has happened!
The mic on my headset is working too. I don't observe any drawbacks w.r.t the sound. The normal output via the laptop speakers is still fully functional when no headphones are plugged in.
The machine is equipped with an i7-4700MQ and has no dGPU. If you need any debugging output or more tests, please let me know.
Cheers, Vladyslav