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Commit 95904743 authored by Takashi Iwai's avatar Takashi Iwai Committed by Jaroslav Kysela
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[ALSA] Add description about probe_mask option for snd-hda-intel 



Added a brief description about probe_mask option for snd-hda-intel.

Signed-off-by: default avatarTakashi Iwai <tiwai@suse.de>
Signed-off-by: default avatarJaroslav Kysela <perex@suse.cz>
parent 2bac647c

Documentation/sound/alsa/ALSA-Configuration.txt

+12 −0
Original line number Original line Diff line number Diff line
@@ -759,6 +759,7 @@ Prior to version 0.9.0rc4 options had a 'snd_' prefix. This was removed. 




    model	- force the model name

    model	- force the model name

    position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)

    position_fix - Fix DMA pointer (0 = auto, 1 = none, 2 = POSBUF, 3 = FIFO size)

    probe_mask  - Bitmask to probe codecs (default = -1, meaning all slots)

    single_cmd  - Use single immediate commands to communicate with

    single_cmd  - Use single immediate commands to communicate with

		codecs (for debugging only)

		codecs (for debugging only)

    enable_msi	- Enable Message Signaled Interrupt (MSI) (default = off)

    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. 
    from the irq.  Remember this is a last resort, and should be

    from the irq.  Remember this is a last resort, and should be

    avoided as much as possible...

    avoided as much as possible...

    

    

    MORE NOTES ON "azx_get_response timeout" PROBLEMS:

    On some hardwares, you may need to add a proper probe_mask option

    to avoid the "azx_get_response timeout" problem above, instead.

    This occurs when the access to non-existing or non-working codec slot

    (likely a modem one) causes a stall of the communication via HD-audio

    bus.  You can see which codec slots are probed by enabling

    CONFIG_SND_DEBUG_DETECT, or simply from the file name of the codec

    proc files.  Then limit the slots to probe by probe_mask option.

    For example, probe_mask=1 means to probe only the first slot, and

    probe_mask=4 means only the third slot.



    The power-management is supported.

    The power-management is supported.





  Module snd-hdsp

  Module snd-hdsp