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authorTakashi Iwai <tiwai@suse.de>2007-08-13 16:10:30 +0200
committerJaroslav Kysela <perex@perex.cz>2007-10-16 15:58:50 +0200
commitdee1b66ce4f406d36fef70d1dd4360c5f1d26218 (patch)
tree0e72125049f8243e5787b16b8d2d77d0e852a306 /Documentation/sound
parentae0a8ed8bf9c2edee4b831dee91ae914b9641fdd (diff)
downloadlinux-dee1b66ce4f406d36fef70d1dd4360c5f1d26218.tar.bz2
[ALSA] hda-intel - Add power_save_controller module option
Add power_save_controller module option instead of define flag. Also, added descriptions of new module options in ALSA-Configuration.txt. Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
Diffstat (limited to 'Documentation/sound')
-rw-r--r--Documentation/sound/alsa/ALSA-Configuration.txt10
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index f71ed680d33c..2bdabe23bc70 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -768,6 +768,10 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
single_cmd - Use single immediate commands to communicate with
codecs (for debugging only)
enable_msi - Enable Message Signaled Interrupt (MSI) (default = off)
+ power_save - Automatic power-saving timtout (in second, 0 =
+ disable, default = 10)
+ power_save_controller - Reset HD-audio controller in power-saving mode
+ (default = on)
This module supports one card and autoprobe.
@@ -993,6 +997,12 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
subsystem ID (output of "lspci -nv") to ALSA BTS or alsa-devel
ML (see the section "Links and Addresses").
+ When CONFIG_SND_HDA_POWER_SAVE is set, two options, power_save and
+ power_save_controller become available. power_save specifies the
+ time to turn off the power automatically at idle status. When
+ power_save_controller is true, the controller is also turned off.
+ This might result in more obvious click noise at turning on/off.
+
Note 2: If you get click noises on output, try the module option
position_fix=1 or 2. position_fix=1 will use the SD_LPIB
register value without FIFO size correction as the current