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ALSA: hda - Update descriptions about new position_fix values 

The new values for the recent Intel and AMD chips are missing in the
documentation.  Add the new descriptions.

Signed-off-by: Takashi Iwai <tiwai@suse.de>
alistair/sunxi64-5.4-dsi
Takashi Iwai 2019-08-28 16:34:36 +02:00
parent 0067e154b1
commit 67d94c2136
2 changed files with 7 additions and 0 deletions
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2
Documentation/sound/alsa-configuration.rst
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@ -1001,6 +1001,8 @@ position_fix
2 = POSBUF: use position buffer, 2 = POSBUF: use position buffer,
3 = VIACOMBO: VIA-specific workaround for capture, 3 = VIACOMBO: VIA-specific workaround for capture,
4 = COMBO: use LPIB for playback, auto for capture stream 4 = COMBO: use LPIB for playback, auto for capture stream
5 = SKL+: apply the delay calculation available on recent Intel chips
6 = FIFO: correct the position with the fixed FIFO size, for recent AMD chips
probe_mask probe_mask
Bitmask to probe codecs (default = -1, meaning all slots); Bitmask to probe codecs (default = -1, meaning all slots);
When the bit 8 (0x100) is set, the lower 8 bits are used When the bit 8 (0x100) is set, the lower 8 bits are used

5
Documentation/sound/hd-audio/notes.rst
View File

@ -66,6 +66,11 @@ by comparing both LPIB and position-buffer values.
``position_fix=4`` is another combination available for all controllers, ``position_fix=4`` is another combination available for all controllers,
and uses LPIB for the playback and the position-buffer for the capture and uses LPIB for the playback and the position-buffer for the capture
streams. streams.
``position_fix=5`` is specific to Intel platforms, so far, for Skylake
and onward. It applies the delay calculation for the precise position
reporting.
``position_fix=6`` is to correct the position with the fixed FIFO
size, mainly targeted for the recent AMD controllers.
0 is the default value for all other 0 is the default value for all other
controllers, the automatic check and fallback to LPIB as described in controllers, the automatic check and fallback to LPIB as described in
the above. If you get a problem of repeated sounds, this option might the above. If you get a problem of repeated sounds, this option might