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| author | Takashi Iwai <tiwai@suse.de> | 2014-11-04 14:02:40 +0100 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2014-11-04 14:09:16 +0100 |
| commit | 2b30d411dbc6eddfb5b4f9afd5a2c57b6f4dd96c (patch) | |
| tree | 02f9efaa6a39b5579eb3f708435ef743b2ab4d09 /Documentation/sound | |
| parent | ALSA: pcm: Replace PCM hwptr tracking with tracepoints (diff) | |
| download | linux-2b30d411dbc6eddfb5b4f9afd5a2c57b6f4dd96c.tar.xz linux-2b30d411dbc6eddfb5b4f9afd5a2c57b6f4dd96c.zip | |
ALSA: pcm: Add xrun_injection proc entry
This patch adds a new proc entry for PCM substreams to inject an
XRUN. When a PCM substream is running and any value is written to its
xrun_injection proc file, the driver triggers XRUN. This is a useful
feature for debugging XRUN and error handling code paths.
Note that this entry is enabled only when CONFIG_SND_PCM_XRUN_DEBUG is
set.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'Documentation/sound')
| -rw-r--r-- | Documentation/sound/alsa/Procfile.txt | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/Documentation/sound/alsa/Procfile.txt b/Documentation/sound/alsa/Procfile.txt index cfc49567b9dc..7f8a0d325905 100644 --- a/Documentation/sound/alsa/Procfile.txt +++ b/Documentation/sound/alsa/Procfile.txt @@ -133,6 +133,10 @@ card*/pcm*/sub*/sw_params card*/pcm*/sub*/prealloc The buffer pre-allocation information. +card*/pcm*/sub*/xrun_injection + Triggers an XRUN to the running stream when any value is + written to this proc file. Used for fault injection. + This entry is write-only. AC97 Codec Information ---------------------- |