[alsa-devel] [PATCH] Kconfig: SND_AC97_POWER_SAVE description improvement
tiwai at suse.de
Thu Jul 15 13:45:25 CEST 2010
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 at gmail.com>
Thanks, applied now to sound git tree.
> 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
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