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kernel
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linux
ALSA: Update documents about new bits of xrun_debug proc file
Signed-off-by: Takashi Iwai <tiwai@suse.de>
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Documentation/sound/alsa/Procfile.txt
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Documentation/sound/alsa/Procfile.txt
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bit 2 = Enable additional jiffies check
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bit 3 = Log hwptr update at each period interrupt
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bit 4 = Log hwptr update at each snd_pcm_update_hw_ptr()
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bit 5 = Show last 10 positions on error
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bit 6 = Do above only once
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When the bit 0 is set, the driver will show the messages to
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kernel log when an xrun is detected. The debug message is
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Bits 3 and 4 are for logging the hwptr records. Note that
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these will give flood of kernel messages.
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When bit 5 is set, the driver logs the last 10 xrun errors and
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the proc file shows each jiffies, position, period_size,
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buffer_size, old_hw_ptr, and hw_ptr_base values.
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When bit 6 is set, the full xrun log is shown only once.
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card*/pcm*/sub*/info
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The general information of this PCM sub-stream.