On Wed, 12 Jan 2022 11:12:49 +0100, Alexander Sergeyev wrote:
On Wed, Jan 12, 2022 at 10:45:46AM +0100, Takashi Iwai wrote:
The problem is about the built-in drivers, or do you see the very same problem even with modules?
The problem is definitely there for the built-in drivers which I've tested quite a lot. It's the primary usecase for me, as I tend to build minimal device-specific and self-contained kernels in Gentoo.
For builds with modules things are not very consistent. Live Ubuntu with an older (and probably vendor-patched) kernel works just fine, but when I pull Ubuntu kernel sources and build it with the mostly same config (including modules) it boots with no sound in Gentoo. Mostly same -- because I need nvme drivers to be built-in as I don't use initrd.
Sounds like some timing issue, then. It's pretty hard to debug, unfortunately.
You may try to get the codec proc dump with COEF by passing snd_hda_codec.dump_coef=1 module option for both working and non-working cases. Check the difference of the COEF and apply the difference with hda-verb manually.
AFAIK, quite a few AMD platforms tend to have some issues with various devices showing initialization problems at the early boot. Just reloading / rebinding the device later often helps.
Is it possible to do with the built-in drivers?
You can unbind and re-bind the PCI (HD-audio controller) device via sysfs.
Takashi