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ALSA: hda - Add power on/off counter

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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>
This commit is contained in:
Takashi Iwai
2009-11-11 09:34:25 +01:00
parent 8f217a226c
commit a2f6309e83
4 changed files with 67 additions and 0 deletions
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16
sound/pci/hda/hda_codec.c
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@@ -515,6 +515,7 @@ static int snd_hda_bus_dev_register(struct snd_device *device)
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 @@ static void hda_call_codec_suspend(struct hda_codec *codec)
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 @@ static void hda_keep_power_on(struct hda_codec *codec)
{
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 @@ void snd_hda_power_up(struct hda_codec *codec)
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);