On Tue, 09 Apr 2019 11:54:27 +0200, Kailang wrote:
Hi Takashi,
https://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound.git/commit/?h=fo...
Use upper patch to print power state in function alc256_init() and alc256_shutup(). But when kernel turn on power_save = 1. (echo 1 > /sys/module/snd_hda_intel/parameters/power_save)
The print power state value always be 0x0.
That's expected, it means PM_EVENT_ON. The power_state value is changed only during the suspend and resume. Once after returning from resume, it's set to PM_EVENT_ON.
( If it turn off power save, power state value will normally)
What does it mean exactly...?
Actually one missing piece is to set PMSG_ON at the device initialization. A patch like below.
thanks,
Takashi
--- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -969,6 +969,7 @@ int snd_hda_codec_device_new(struct hda_bus *bus, struct snd_card *card,
/* power-up all before initialization */ hda_set_power_state(codec, AC_PWRST_D0); + codec->core.dev.power.power_state = PMSG_ON;
snd_hda_codec_proc_new(codec);