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| author | David Henningsson <david.henningsson@canonical.com> | 2010-09-30 10:12:50 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2010-09-30 14:16:11 +0200 |
| commit | 4cb36310848fd17766aa72afd1f2873f54b4e055 (patch) | |
| tree | bdd58b3ab4085de265086417d0dbcc53a31eeb45 /Documentation/sound | |
| parent | ALSA: hda - Add quirk for another Acer laptop with a CX20585 codec (diff) | |
| download | linux-4cb36310848fd17766aa72afd1f2873f54b4e055.tar.xz linux-4cb36310848fd17766aa72afd1f2873f54b4e055.zip | |
ALSA: HDA: Add position_fix=3 module option, and refactor related code
What was previously known as via_dmapos_patch, and hard-coded to be
used for VIA and ATI controllers, is now configurable through a module
option. The background is that some VIA controllers seem to prefer
via_dmapos_patch to be turned off.
Signed-off-by: David Henningsson <david.henningsson@canonical.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation/sound')
| -rw-r--r-- | Documentation/sound/alsa/HD-Audio.txt | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/Documentation/sound/alsa/HD-Audio.txt b/Documentation/sound/alsa/HD-Audio.txt index 278cc2122ea0..c82beb007634 100644 --- a/Documentation/sound/alsa/HD-Audio.txt +++ b/Documentation/sound/alsa/HD-Audio.txt @@ -57,9 +57,11 @@ dead. However, this detection isn't perfect on some devices. In such a case, you can change the default method via `position_fix` option. `position_fix=1` means to use LPIB method explicitly. -`position_fix=2` means to use the position-buffer. 0 is the default -value, the automatic check and fallback to LPIB as described in the -above. If you get a problem of repeated sounds, this option might +`position_fix=2` means to use the position-buffer. +`position_fix=3` means to use a combination of both methods, needed +for some VIA and ATI controllers. 0 is the default value for all other +controllers, the automatic check and fallback to LPIB as described in +the above. If you get a problem of repeated sounds, this option might help. In addition to that, every controller is known to be broken regarding |