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-rw-r--r--Documentation/sound/alsa/ALSA-Configuration.txt8
1 files changed, 7 insertions, 1 deletions
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index 12e3a0fb9be..6f75ba3b8a3 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -860,7 +860,8 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
[Multiple options for each card instance]
model - force the model name
- position_fix - Fix DMA pointer (0 = auto, 1 = use LPIB, 2 = POSBUF)
+ position_fix - Fix DMA pointer (0 = auto, 1 = use LPIB, 2 = POSBUF,
+ 3 = VIACOMBO, 4 = COMBO)
probe_mask - Bitmask to probe codecs (default = -1, meaning all slots)
When the bit 8 (0x100) is set, the lower 8 bits are used
as the "fixed" codec slots; i.e. the driver probes the
@@ -925,6 +926,11 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
(Usually SD_LPIB register is more accurate than the
position buffer.)
+ position_fix=3 is specific to VIA devices. The position
+ of the capture stream is checked from both LPIB and POSBUF
+ values. position_fix=4 is a combination mode, using LPIB
+ for playback and POSBUF for capture.
+
NB: If you get many "azx_get_response timeout" messages at
loading, it's likely a problem of interrupts (e.g. ACPI irq
routing). Try to boot with options like "pci=noacpi". Also, you