diff options
author | Jaroslav Kysela <perex@perex.cz> | 2010-03-26 05:28:46 -0400 |
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committer | Jaroslav Kysela <perex@perex.cz> | 2010-03-26 05:37:39 -0400 |
commit | cd508fe58b07499403e806b558c7f15c90442292 (patch) | |
tree | 5ec4c40b7c7b84595c65f5f9dda96e1a01eacc2b /Documentation/sound | |
parent | 306ff3e473a970f88680e8355c0900fcab0357e2 (diff) |
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 | |||
196 | parser is much better than the generic parser (as now). Thus this | 196 | parser is much better than the generic parser (as now). Thus this |
197 | option is more about the debugging purpose. | 197 | option is more about the debugging purpose. |
198 | 198 | ||
199 | Another special meaning has 'model=hwio'. For this model, the driver | ||
200 | bypasses any codec initialization and the reset procedure for codecs | ||
201 | is also bypassed. This mode is usefull to enable direct access using | ||
202 | hwdep interface (using hdaverb or hda-analyzer tools) and retain | ||
203 | codec setup from BIOS. | ||
199 | 204 | ||
200 | Speaker and Headphone Output | 205 | Speaker and Headphone Output |
201 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | 206 | ~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |