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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-07 17:07:31 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2010-08-07 17:07:31 -0700 |
| commit | faa38b5e0e092914764cdba9f83d31a3f794d182 (patch) | |
| tree | b3e5921bdc36378033b4910eb4f29cb0dfc486e0 /sound/drivers/Kconfig | |
| parent | 78417334b5cb6e1f915b8fdcc4fce3f1a1b4420c (diff) | |
| parent | 74bf40f0793fed9e01eb6164c2ce63e8c27ca205 (diff) | |
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6
* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound-2.6: (214 commits)
ALSA: hda - Add pin-fix for HP dc5750
ALSA: als4000: Fix potentially invalid DMA mode setup
ALSA: als4000: enable burst mode
ALSA: hda - Fix initial capsrc selection in patch_alc269()
ASoC: TWL4030: Capture route runtime DAPM ordering fix
ALSA: hda - Add PC-beep whitelist for an Intel board
ALSA: hda - More relax for pending period handling
ALSA: hda - Define AC_FMT_* constants
ALSA: hda - Fix beep frequency on IDT 92HD73xx and 92HD71Bxx codecs
ALSA: hda - Add support for HDMI HBR passthrough
ALSA: hda - Set Stream Type in Stream Format according to AES0
ALSA: hda - Fix Thinkpad X300 so SPDIF is not exposed
ALSA: hda - FIX to not expose SPDIF on Thinkpad X301, since it does not have the ability to use SPDIF
ASoC: wm9081: fix resource reclaim in wm9081_register error path
ASoC: wm8978: fix a memory leak if a wm8978_register fail
ASoC: wm8974: fix a memory leak if another WM8974 is registered
ASoC: wm8961: fix resource reclaim in wm8961_register error path
ASoC: wm8955: fix resource reclaim in wm8955_register error path
ASoC: wm8940: fix a memory leak if wm8940_register return error
ASoC: wm8904: fix resource reclaim in wm8904_register error path
...
Diffstat (limited to 'sound/drivers/Kconfig')
| -rw-r--r-- | sound/drivers/Kconfig | 24 |
1 files changed, 21 insertions, 3 deletions
diff --git a/sound/drivers/Kconfig b/sound/drivers/Kconfig index c290cee4cee..480c38623da 100644 --- a/sound/drivers/Kconfig +++ b/sound/drivers/Kconfig @@ -170,9 +170,25 @@ config SND_AC97_POWER_SAVE AC97 codecs. In this mode, the power-mode is dynamically controlled at each open/close. - The mode is activated by passing power_save=1 option to - snd-ac97-codec driver. You can toggle it dynamically over - sysfs, too. + The mode is activated by passing 'power_save=X' to the + snd-ac97-codec driver module, where 'X' is the time-out + value, a nonnegative integer that specifies how many + seconds of idle time the driver must count before it may + put the AC97 into power-save mode; a value of 0 (zero) + disables the use of this power-save mode. + + After the snd-ac97-codec driver module has been loaded, + the 'power_save' parameter can be set via sysfs as follows: + + echo 10 > /sys/module/snd_ac97_codec/parameters/power_save + + In this case, the time-out is set to 10 seconds; setting + the time-out to 1 second (the minimum activation value) + isn't recommended because many applications try to reopen + the device frequently. A value of 10 seconds would be a + good choice for normal operations. + + See Documentation/sound/alsa/powersave.txt for more details. config SND_AC97_POWER_SAVE_DEFAULT int "Default time-out for AC97 power-save mode" @@ -182,4 +198,6 @@ config SND_AC97_POWER_SAVE_DEFAULT The default time-out value in seconds for AC97 automatic power-save mode. 0 means to disable the power-save mode. + See SND_AC97_POWER_SAVE for more details. + endif # SND_DRIVERS |