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-rw-r--r--Documentation/sound/alsa/ALSA-Configuration.txt12
1 files changed, 12 insertions, 0 deletions
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index 297ff0de7392..32124bf00498 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -759,6 +759,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
759 759
760 model - force the model name 760 model - force the model name
761 position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size) 761 position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)
762 probe_mask - Bitmask to probe codecs (default = -1, meaning all slots)
762 single_cmd - Use single immediate commands to communicate with 763 single_cmd - Use single immediate commands to communicate with
763 codecs (for debugging only) 764 codecs (for debugging only)
764 enable_msi - Enable Message Signaled Interrupt (MSI) (default = off) 765 enable_msi - Enable Message Signaled Interrupt (MSI) (default = off)
@@ -966,6 +967,17 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed.
966 from the irq. Remember this is a last resort, and should be 967 from the irq. Remember this is a last resort, and should be
967 avoided as much as possible... 968 avoided as much as possible...
968 969
970 MORE NOTES ON "azx_get_response timeout" PROBLEMS:
971 On some hardwares, you may need to add a proper probe_mask option
972 to avoid the "azx_get_response timeout" problem above, instead.
973 This occurs when the access to non-existing or non-working codec slot
974 (likely a modem one) causes a stall of the communication via HD-audio
975 bus. You can see which codec slots are probed by enabling
976 CONFIG_SND_DEBUG_DETECT, or simply from the file name of the codec
977 proc files. Then limit the slots to probe by probe_mask option.
978 For example, probe_mask=1 means to probe only the first slot, and
979 probe_mask=4 means only the third slot.
980
969 The power-management is supported. 981 The power-management is supported.
970 982
971 Module snd-hdsp 983 Module snd-hdsp