Hi Morimoto-san,
On Thu, Aug 25, 2022 at 3:11 AM Kuninori Morimoto
<kuninori.morimoto.gx@xxxxxxxxxxx> wrote:
> > > > To probe "Sound Card", it needs other necessary drivers.
> > > > But it seems some necessary drivers are not probed by above patch.
> > > > In my quick check, "HDMI" and 1 of "Sound Codec" drivers are not probed.
> (snip)
> > > Saravana is more familiar with devlink than I am, so he may be able to
> > > diagnose that without further information, but otherwise it would be
> > > helpful if you could provide some logs. Enabling the debug messages in
> > > drivers/base/dd.c can provide some insight. The contents of the debugfs
> > > devices_deferred file can also be useful, as well as the
> > > consumer/supplier links in sysfs for all the devices involved with the
> > > sound card.
>
> Thanks !
>
> This devices_deferred file (which I didn't know) helped my issue.
> It was my fault. My .config had been missing necessary driver
> (= CONFIG_REGULATOR_FIXED_VOLTAGE).
>
> ... but... why it had been working without it before... ?
I guess the adi,adv7513 and ti,pcm3168a drivers consider regulators
optional, so when they probe, they succeed?
With devlinks enabled, they are never probed, as their dependencies
didn't probe due to the missing regulator driver.
Gr{oetje,eeting}s,
Geert
--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@xxxxxxxxxxxxxx
In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
-- Linus Torvalds
