13 May
2019
13 May
'19
5 a.m.
Hi Takashi,
When System Boot up. The Hda Driver running step was as below.
alc_init(); alc_shutup(); alc_init();
The depop procedure was put in spec->init_hook and spec->shutup.
But I find more codec which run spec->shutup at boot up. It will occur pop noise. If it doesn't run spec->shutup, it will not occur pop noise or reduce pop noise.
How could the spec->shutup not run at boot up?
I ever test to put the check in spec->shutup() for PM_EVENT_SUSPEND and PM_EVENT_HIBERNATE and shutdown. But if power_save=1, it was have issue for this. Codec was idle already in power_save=1 state. If system go suspend, it will not run spec->shutup() again.
BR, Kailang