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ALSA: hda - Record the current power state before suspend/resume calls 

commit 98081ca62c upstream.

Currently we deal with single codec and suspend codec callbacks for
all S3, S4 and runtime PM handling.  But it turned out that we want
distinguish the call patterns sometimes, e.g. for applying some init
sequence only at probing and restoring from hibernate.

This patch slightly modifies the common PM callbacks for HD-audio
codec and stores the currently processed PM event in power_state of
the codec's device.power field, which is currently unused.  The codec
callback can take a look at this event value and judges which purpose
it's being called.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Takashi Iwai 2019-01-29 14:03:33 +01:00 committed by Greg Kroah-Hartman
parent 670d934a1e
commit 5ee8694556
1 changed files with 41 additions and 2 deletions
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43
sound/pci/hda/hda_codec.c
View File

@ -3004,6 +3004,7 @@ static void hda_call_codec_resume(struct hda_codec *codec)
hda_jackpoll_work(&codec->jackpoll_work.work);
else
snd_hda_jack_report_sync(codec);
codec->core.dev.power.power_state = PMSG_ON;
atomic_dec(&codec->core.in_pm);
}
@ -3036,10 +3037,48 @@ static int hda_codec_runtime_resume(struct device *dev)
}
#endif /* CONFIG_PM */
#ifdef CONFIG_PM_SLEEP
static int hda_codec_pm_suspend(struct device *dev)
{
dev->power.power_state = PMSG_SUSPEND;
return pm_runtime_force_suspend(dev);
}
static int hda_codec_pm_resume(struct device *dev)
{
dev->power.power_state = PMSG_RESUME;
return pm_runtime_force_resume(dev);
}
static int hda_codec_pm_freeze(struct device *dev)
{
dev->power.power_state = PMSG_FREEZE;
return pm_runtime_force_suspend(dev);
}
static int hda_codec_pm_thaw(struct device *dev)
{
dev->power.power_state = PMSG_THAW;
return pm_runtime_force_resume(dev);
}
static int hda_codec_pm_restore(struct device *dev)
{
dev->power.power_state = PMSG_RESTORE;
return pm_runtime_force_resume(dev);
}
#endif /* CONFIG_PM_SLEEP */
/* referred in hda_bind.c */
const struct dev_pm_ops hda_codec_driver_pm = {
SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
pm_runtime_force_resume)
#ifdef CONFIG_PM_SLEEP
.suspend = hda_codec_pm_suspend,
.resume = hda_codec_pm_resume,
.freeze = hda_codec_pm_freeze,
.thaw = hda_codec_pm_thaw,
.poweroff = hda_codec_pm_suspend,
.restore = hda_codec_pm_restore,
#endif /* CONFIG_PM_SLEEP */
SET_RUNTIME_PM_OPS(hda_codec_runtime_suspend, hda_codec_runtime_resume,
NULL)
};