path: root/Documentation/sound
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authorTakashi Iwai <tiwai@suse.de>2014-11-04 14:02:40 +0100
committerTakashi Iwai <tiwai@suse.de>2014-11-04 14:09:16 +0100
commit2b30d411dbc6eddfb5b4f9afd5a2c57b6f4dd96c (patch)
tree02f9efaa6a39b5579eb3f708435ef743b2ab4d09 /Documentation/sound
parentf5914908a5b7b2338f210e56827a1ef35585dc6d (diff)
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')
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
The buffer pre-allocation information.
+ 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

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