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authorTakashi Iwai <tiwai@suse.de>2009-05-27 16:51:27 +0200
committerTakashi Iwai <tiwai@suse.de>2009-05-27 16:51:27 +0200
commitf5219b619504875a14b63659eecd86098208620c (patch)
treef7baac310166bb964f309734d80e1b68a4260752 /Documentation/sound
parentf00452cfdc5ab97208078f06e802b39a4839b7b3 (diff)
parentc87d9732004b3f8fd82d729f12ccfb96c0df279e (diff)
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Merge branch 'fix/pcm-jiffies-check' into for-linus
* fix/pcm-jiffies-check: ALSA: Enable PCM hw_ptr_jiffies check only in xrun_debug mode ALSA: Fix invalid jiffies check after pause
Diffstat (limited to 'Documentation/sound')
-rw-r--r--Documentation/sound/alsa/Procfile.txt5
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/sound/alsa/Procfile.txt b/Documentation/sound/alsa/Procfile.txt
index bba2dbb79d81..cfac20cf9e33 100644
--- a/Documentation/sound/alsa/Procfile.txt
+++ b/Documentation/sound/alsa/Procfile.txt
@@ -104,6 +104,11 @@ card*/pcm*/xrun_debug
When this value is greater than 1, the driver will show the
stack trace additionally. This may help the debugging.
+ Since 2.6.30, this option also enables the hwptr check using
+ jiffies. This detects spontaneous invalid pointer callback
+ values, but can be lead to too much corrections for a (mostly
+ buggy) hardware that doesn't give smooth pointer updates.
+
card*/pcm*/sub*/info
The general information of this PCM sub-stream.