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| author | Jaroslav Kysela <perex@perex.cz> | 2010-03-26 10:28:46 +0100 |
|---|---|---|
| committer | Jaroslav Kysela <perex@perex.cz> | 2010-03-26 10:37:39 +0100 |
| commit | cd508fe58b07499403e806b558c7f15c90442292 (patch) | |
| tree | 5ec4c40b7c7b84595c65f5f9dda96e1a01eacc2b /Documentation/sound | |
| parent | 306ff3e473a970f88680e8355c0900fcab0357e2 (diff) | |
| download | linux-cd508fe58b07499403e806b558c7f15c90442292.tar.bz2 | |
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.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/sound/alsa/HD-Audio.txt b/Documentation/sound/alsa/HD-Audio.txt index f4dd3bf99d12..ecacf53a8655 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 ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |