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ALSA: Update documents about new bits of xrun_debug proc file

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Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Iwai 2010-07-08 09:01:17 +02:00
parent f978d36da4
commit 54a3b8dc38
1 changed files with 8 additions and 0 deletions
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8
Documentation/sound/alsa/Procfile.txt
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@ -103,6 +103,8 @@ card*/pcm*/xrun_debug
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()
bit 5 = Show last 10 positions on error
bit 6 = Do above only once
When the bit 0 is set, the driver will show the messages to
kernel log when an xrun is detected. The debug message is
@ -122,6 +124,12 @@ card*/pcm*/xrun_debug
Bits 3 and 4 are for logging the hwptr records. Note that
these will give flood of kernel messages.
When bit 5 is set, the driver logs the last 10 xrun errors and
the proc file shows each jiffies, position, period_size,
buffer_size, old_hw_ptr, and hw_ptr_base values.
When bit 6 is set, the full xrun log is shown only once.
card*/pcm*/sub*/info
The general information of this PCM sub-stream.