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-rw-r--r--Documentation/usb/gadget-testing.rst12
1 files changed, 11 insertions, 1 deletions
diff --git a/Documentation/usb/gadget-testing.rst b/Documentation/usb/gadget-testing.rst
index 9d6276f82774..272e51f17f54 100644
--- a/Documentation/usb/gadget-testing.rst
+++ b/Documentation/usb/gadget-testing.rst
@@ -729,10 +729,20 @@ The uac2 function provides these attributes in its function directory:
c_srate capture sampling rate
c_ssize capture sample size (bytes)
c_sync capture synchronization type (async/adaptive)
- fb_max maximum extra bandwidth in async mode
+ c_mute_present capture mute control enable
+ c_volume_present capture volume control enable
+ c_volume_min capture volume control min value (in 1/256 dB)
+ c_volume_max capture volume control max value (in 1/256 dB)
+ c_volume_res capture volume control resolution (in 1/256 dB)
+ fb_max maximum extra bandwidth in async mode
p_chmask playback channel mask
p_srate playback sampling rate
p_ssize playback sample size (bytes)
+ p_mute_present playback mute control enable
+ p_volume_present playback volume control enable
+ p_volume_min playback volume control min value (in 1/256 dB)
+ p_volume_max playback volume control max value (in 1/256 dB)
+ p_volume_res playback volume control resolution (in 1/256 dB)
req_number the number of pre-allocated request for both capture
and playback
=============== ====================================================