At Wed, 14 Jul 2010 23:54:21 +0000, Michael Witten wrote: > > The description has been expanded to explain the time-out > value provided by the power_save module parameter. > > Signed-off-by: Michael Witten <mfwitten@xxxxxxxxx> Thanks, applied now to sound git tree. Takashi > --- > sound/drivers/Kconfig | 24 +++++++++++++++++++++--- > 1 files changed, 21 insertions(+), 3 deletions(-) > > diff --git a/sound/drivers/Kconfig b/sound/drivers/Kconfig > index 84714a6..3264600 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 > -- > 1.7.2.rc1.9.g5b527 > _______________________________________________ Alsa-devel mailing list Alsa-devel@xxxxxxxxxxxxxxxx http://mailman.alsa-project.org/mailman/listinfo/alsa-devel
