ALSA: hda - Add power on/off counter
Added the power on/off counter and expose via sysfs files.
The sysfs files, power_on_acct and power_off_acct, are created under
each codec hwdep sysfs directory (e.g. /sys/class/sound/hwC0D0).
The files show the msec length of the codec power-on and power-off,
respectively.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c
index 2b787b0..444d903 100644
--- a/sound/pci/hda/hda_codec.c
+++ b/sound/pci/hda/hda_codec.c
@@ -515,6 +515,7 @@
struct hda_codec *codec;
list_for_each_entry(codec, &bus->codec_list, list) {
snd_hda_hwdep_add_sysfs(codec);
+ snd_hda_hwdep_add_power_sysfs(codec);
}
return 0;
}
@@ -2452,9 +2453,11 @@
codec->afg ? codec->afg : codec->mfg,
AC_PWRST_D3);
#ifdef CONFIG_SND_HDA_POWER_SAVE
+ snd_hda_update_power_acct(codec);
cancel_delayed_work(&codec->power_work);
codec->power_on = 0;
codec->power_transition = 0;
+ codec->power_jiffies = jiffies;
#endif
}
@@ -3191,6 +3194,17 @@
{
codec->power_count++;
codec->power_on = 1;
+ codec->power_jiffies = jiffies;
+}
+
+void snd_hda_update_power_acct(struct hda_codec *codec)
+{
+ unsigned long delta = jiffies - codec->power_jiffies;
+ if (codec->power_on)
+ codec->power_on_acct += delta;
+ else
+ codec->power_off_acct += delta;
+ codec->power_jiffies += delta;
}
void snd_hda_power_up(struct hda_codec *codec)
@@ -3201,7 +3215,9 @@
if (codec->power_on || codec->power_transition)
return;
+ snd_hda_update_power_acct(codec);
codec->power_on = 1;
+ codec->power_jiffies = jiffies;
if (bus->ops.pm_notify)
bus->ops.pm_notify(bus);
hda_call_codec_resume(codec);