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Documentation: usb: UAC1 function testing 

Summary of how to test UAC1 function of USB gadget.

Signed-off-by: Andrzej Pietrasiewicz <andrzej.p@samsung.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>
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Andrzej Pietrasiewicz 2014-12-16 14:56:40 +01:00 committed by Felipe Balbi
parent 480a912be4
commit dae0358694
1 changed files with 27 additions and 0 deletions
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27
Documentation/usb/gadget-testing.txt
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@ -16,6 +16,7 @@ provided by gadgets.
13. RNDIS function
14. SERIAL function
15. SOURCESINK function
16. UAC1 function
1. ACM function
@ -587,3 +588,29 @@ device: run the gadget
host: test-usb
http://www.linux-usb.org/usbtest/testusb.c
16. UAC1 function
=================
The function is provided by usb_f_uac1.ko module.
Function-specific configfs interface
------------------------------------
The function name to use when creating the function directory is "uac1".
The uac1 function provides these attributes in its function directory:
audio_buf_size - audio buffer size
fn_cap - capture pcm device file name
fn_cntl - control device file name
fn_play - playback pcm device file name
req_buf_size - ISO OUT endpoint request buffer size
req_count - ISO OUT endpoint request count
The attributes have sane default values.
Testing the UAC1 function
-------------------------
device: run the gadget
host: aplay -l # should list our USB Audio Gadget