ALSA: Add missing description of usb-audio parameters
Added the missing description of module parameters of usb-audio driver
to ALSA-Configuration.txt.
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
diff --git a/Documentation/sound/alsa/ALSA-Configuration.txt b/Documentation/sound/alsa/ALSA-Configuration.txt
index dd083b2..68bbc25 100644
--- a/Documentation/sound/alsa/ALSA-Configuration.txt
+++ b/Documentation/sound/alsa/ALSA-Configuration.txt
@@ -1978,12 +1978,20 @@
vid - Vendor ID for the device (optional)
pid - Product ID for the device (optional)
+ nrpacks - Max. number of packets per URB (default: 8)
+ async_unlink - Use async unlink mode (default: yes)
device_setup - Device specific magic number (optional)
- Influence depends on the device
- Default: 0x0000
This module supports multiple devices, autoprobe and hotplugging.
+ NB: nrpacks parameter can be modified dynamically via sysfs.
+ Don't put the value over 20. Changing via sysfs has no sanity
+ check.
+ NB: async_unlink=0 would cause Oops. It remains just for
+ debugging purpose (if any).
+
Module snd-usb-caiaq
--------------------