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According to the spec "USB Interface Association Descriptor Device Class Code and Use Model"[1], the Interface Association Descriptor (IAD) is needed for composite device which has multiple interfaces controlled independently of each other. Without the IAD, the device may not work as expected because the USB system software will not properly bind the interfaces with drivers (e.g UAC1 && UVC composite device not recognized in Win10). [1] https://www.usb.org/sites/default/files/iadclasscode_r10.pdf Change-Id: I446c771fe182bd556a054d9ae0ada1374442d1d0 Signed-off-by: William Wu <william.wu@rock-chips.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
See Documentation/00-INDEX for a list of what is contained in each file.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.