[wdmaudiodev] Re: Purpose of CS_CONFIGURATION

  • From: Tim Roberts <timr@xxxxxxxxx>
  • To: "wdmaudiodev@xxxxxxxxxxxxx" <wdmaudiodev@xxxxxxxxxxxxx>
  • Date: Thu, 29 Jun 2017 14:31:37 -0700

Børge Strand-Bergesen wrote:


Could you please enlighten me on the purpose of USB Audio
Class-specific Descriptor Type CS_CONFIGURATION, 0x22 ? 

While trying to debug my descriptor problems, we have found an
unanswered request for 0x22 coming from Win10 C.U. 

CS_CONFIGURATION is part of table A.8 in Audio20 final.pdf. However,
the code base I'm working on only defines parts of that table and not
all of it.

I'm surprised anyone is asking for that, because as far as I am aware,
no such thing exists.  The code number is defined in case someone later
on needed a class-specific configuration descriptor (just like
CS_DEVICE), but there is currently no such need.

-- 
Tim Roberts, timr@xxxxxxxxx
Providenza & Boekelheide, Inc.

******************

WDMAUDIODEV addresses:
Post message: mailto:wdmaudiodev@xxxxxxxxxxxxx
Subscribe:    mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=subscribe
Unsubscribe:  mailto:wdmaudiodev-request@xxxxxxxxxxxxx?subject=unsubscribe
Moderator:    mailto:wdmaudiodev-moderators@xxxxxxxxxxxxx

URL to WDMAUDIODEV page:
http://www.wdmaudiodev.com/

Other related posts: