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authorTakashi Iwai <tiwai@suse.de>2019-08-28 16:34:36 +0200
committerTakashi Iwai <tiwai@suse.de>2019-08-28 16:34:36 +0200
commit67d94c21361959668da5b32ba1b1c1d4a3ddba21 (patch)
tree688007071988c956377881b5e0de832e0bbcb042 /Documentation/sound
parent0067e154b11e236d62a7a8205f321b097c21a35b (diff)
downloadlinux-67d94c21361959668da5b32ba1b1c1d4a3ddba21.tar.bz2
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>
Diffstat (limited to 'Documentation/sound')
-rw-r--r--Documentation/sound/alsa-configuration.rst2
-rw-r--r--Documentation/sound/hd-audio/notes.rst5
2 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/sound/alsa-configuration.rst b/Documentation/sound/alsa-configuration.rst
index 4a3cecc8ad38..02aacd69ab96 100644
--- a/Documentation/sound/alsa-configuration.rst
+++ b/Documentation/sound/alsa-configuration.rst
@@ -1001,6 +1001,8 @@ position_fix
2 = POSBUF: use position buffer,
3 = VIACOMBO: VIA-specific workaround for capture,
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
Bitmask to probe codecs (default = -1, meaning all slots);
When the bit 8 (0x100) is set, the lower 8 bits are used
diff --git a/Documentation/sound/hd-audio/notes.rst b/Documentation/sound/hd-audio/notes.rst
index 9f7347830ba4..0f3109d9abc8 100644
--- a/Documentation/sound/hd-audio/notes.rst
+++ b/Documentation/sound/hd-audio/notes.rst
@@ -66,6 +66,11 @@ by comparing both LPIB and position-buffer values.
``position_fix=4`` is another combination available for all controllers,
and uses LPIB for the playback and the position-buffer for the capture
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
controllers, the automatic check and fallback to LPIB as described in
the above. If you get a problem of repeated sounds, this option might