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authorJaroslav Kysela <perex@perex.cz>2010-03-26 10:28:46 +0100
committerJaroslav Kysela <perex@perex.cz>2010-03-26 10:37:39 +0100
commitcd508fe58b07499403e806b558c7f15c90442292 (patch)
tree5ec4c40b7c7b84595c65f5f9dda96e1a01eacc2b /Documentation/sound
parent306ff3e473a970f88680e8355c0900fcab0357e2 (diff)
downloadlinux-linaro-android-cd508fe58b07499403e806b558c7f15c90442292.tar.gz
ALSA: hda-intel - add special 'hwio' model to bypass initialization
Using the 'model=hwio' option, the driver bypasses any codec initialization and the reset procedure for codecs is also bypassed. This mode is usefull to enable direct access using hwdep interface (using hdaverb or hda-analyzer tools) and retain codec setup from BIOS. Signed-off-by: Jaroslav Kysela <perex@perex.cz>
Diffstat (limited to 'Documentation/sound')
-rw-r--r--Documentation/sound/alsa/HD-Audio.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/sound/alsa/HD-Audio.txt b/Documentation/sound/alsa/HD-Audio.txt
index f4dd3bf99d1..ecacf53a865 100644
--- a/Documentation/sound/alsa/HD-Audio.txt
+++ b/Documentation/sound/alsa/HD-Audio.txt
@@ -196,6 +196,11 @@ generic parser regardless of the codec. Usually the codec-specific
parser is much better than the generic parser (as now). Thus this
option is more about the debugging purpose.
+Another special meaning has 'model=hwio'. For this model, the driver
+bypasses any codec initialization and the reset procedure for codecs
+is also bypassed. This mode is usefull to enable direct access using
+hwdep interface (using hdaverb or hda-analyzer tools) and retain
+codec setup from BIOS.
Speaker and Headphone Output
~~~~~~~~~~~~~~~~~~~~~~~~~~~~