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| author | Takashi Iwai <tiwai@suse.de> | 2009-11-11 09:34:25 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2009-11-11 09:37:08 +0100 |
| commit | a2f6309e8392e2c14c04594fca8b4876c8c9bc36 (patch) | |
| tree | 78db71701660196181768b898bcc80db8bc10009 /sound/pci/hda/hda_codec.c | |
| parent | 8f217a226cfa7b960b8a6c00cef6b4de2c5dd030 (diff) | |
| download | linux-a2f6309e8392e2c14c04594fca8b4876c8c9bc36.tar.gz linux-a2f6309e8392e2c14c04594fca8b4876c8c9bc36.tar.bz2 linux-a2f6309e8392e2c14c04594fca8b4876c8c9bc36.zip | |
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>
Diffstat (limited to 'sound/pci/hda/hda_codec.c')
| -rw-r--r-- | sound/pci/hda/hda_codec.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_codec.c b/sound/pci/hda/hda_codec.c index 2b787b013e93..444d9039c1ac 100644 --- a/sound/pci/hda/hda_codec.c +++ b/sound/pci/hda/hda_codec.c @@ -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); |