On Wed, 04 Apr 2018 18:29:23 +0200,
David Woodhouse wrote:
>
> > Maybe you can try to enable the GPIO unsolicited event and see whether
> > any unsolicited event is generated. Though, the datasheet says it's
> > something else individual, but who knows.
>
> Hm... forgive my ignorance; how do I do that?
If you have hda-verb program installed (included in alsa-tools), it
can be enabled dynamically like
hda-verb /dev/snd/hwC0D0 0x01 SET_GPIO_UNSOLICITED_RSP_MASK, XXX
where XXX is the GPIO pin bit to enable the unsolicited event, 0x01,
0x02, 0x04, etc. You codec has 7 GPIO pins, so up to 0x40.
Some of them might be already used for the existing purposes (or
shared) like an amp control.
Then watch the tracing output after
# echo 1 > /sys/kernel/debug/tracing/events/hda/enable
Takashi
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