ALSA: Update documents about new bits of xrun_debug proc file
Signed-off-by: Takashi Iwai <tiwai@suse.de>
diff --git a/Documentation/sound/alsa/Procfile.txt b/Documentation/sound/alsa/Procfile.txt
index 07301de..7fcd1ad 100644
--- a/Documentation/sound/alsa/Procfile.txt
+++ b/Documentation/sound/alsa/Procfile.txt
@@ -103,6 +103,8 @@
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 @@
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.