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| author | Takashi Iwai <tiwai@suse.de> | 2006-06-27 18:28:53 +0200 |
|---|---|---|
| committer | Jaroslav Kysela <perex@suse.cz> | 2006-09-23 10:37:08 +0200 |
| commit | 6dbe662874ba08585eaf732d126762c25ac8e3f7 (patch) | |
| tree | 7460c36d4d848f223b682f7a700866bcf6dbc7d5 /sound/drivers | |
| parent | [ALSA] Deprecate snd_card_free_in_thread() (diff) | |
| download | linux-6dbe662874ba08585eaf732d126762c25ac8e3f7.tar.xz linux-6dbe662874ba08585eaf732d126762c25ac8e3f7.zip | |
[ALSA] Add experimental support of aggressive AC97 power-saving mode
Added CONFIG_SND_AC97_POWER_SAVE kernel config to enable the support
of aggressive AC97 power-saving mode. In this mode, the AC97
powerdown register bits are dynamically controlled at each open/close
of PCM streams.
The mode is activated via power_save option for snd-ac97-codec
driver. As default it's off. It can be turned on/off on the fly
via sysfs, too.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'sound/drivers')
| -rw-r--r-- | sound/drivers/Kconfig | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sound/drivers/Kconfig b/sound/drivers/Kconfig index 395c4ef52ac9..897dc2dfd7dd 100644 --- a/sound/drivers/Kconfig +++ b/sound/drivers/Kconfig @@ -100,4 +100,17 @@ config SND_MPU401 To compile this driver as a module, choose M here: the module will be called snd-mpu401. +config SND_AC97_POWER_SAVE + bool "AC97 Power-Saving Mode" + depends on SND_AC97_CODEC && EXPERIMENTAL + default n + help + Say Y here to enable the aggressive power-saving support of + 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. + endmenu |