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 07301de12cc4d7c6048f50f5e8cef7b99d8846df..7fcd1ad96fccba5e714612d1662398c07bf3bc81 100644 (file)
--- a/Documentation/sound/alsa/Procfile.txt
+++ b/Documentation/sound/alsa/Procfile.txt
@@ -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.