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authorTakashi Iwai <tiwai@suse.de>2009-07-26 11:07:07 +0200
committerTakashi Iwai <tiwai@suse.de>2009-07-26 11:07:07 +0200
commitb88158846f36374553a5915b7cb5a86540cf9762 (patch)
treeddcfc36eadda7b9d67b60b7c6bce10cf8b7abc38 /Documentation
parentde5d674c0220e3adc84fb05d0e8e2793ffc094d8 (diff)
parent947ca210f1df7656e19890832cb71fc3bdd88707 (diff)
downloadblackbird-op-linux-b88158846f36374553a5915b7cb5a86540cf9762.tar.gz
blackbird-op-linux-b88158846f36374553a5915b7cb5a86540cf9762.zip
Merge branch 'fix/pcm-hwptr' into for-linus
* fix/pcm-hwptr: ALSA: pcm - Fix hwptr buffer-size overlap bug ALSA: pcm - Fix warnings in debug loggings ALSA: pcm - Add logging of hwptr updates and interrupt updates ALSA: pcm - Fix regressions with VMware
Diffstat (limited to 'Documentation')
-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 381908d8ca42..719a819f8cc2 100644
--- a/Documentation/sound/alsa/Procfile.txt
+++ b/Documentation/sound/alsa/Procfile.txt
@@ -101,6 +101,8 @@ card*/pcm*/xrun_debug
bit 0 = Enable XRUN/jiffies debug messages
bit 1 = Show stack trace at XRUN / jiffies check
bit 2 = Enable additional jiffies check
+ bit 3 = Log hwptr update at each period interrupt
+ bit 4 = Log hwptr update at each snd_pcm_update_hw_ptr()
When the bit 0 is set, the driver will show the messages to
kernel log when an xrun is detected. The debug message is
@@ -117,6 +119,9 @@ card*/pcm*/xrun_debug
buggy) hardware that doesn't give smooth pointer updates.
This feature is enabled via the bit 2.
+ Bits 3 and 4 are for logging the hwptr records. Note that
+ these will give flood of kernel messages.
+
card*/pcm*/sub*/info
The general information of this PCM sub-stream.
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