Ren Jianing 55c7a54911 usb: gadget: u_audio: add uevent for set_alt and set_srate
This patch add uevent to notify the application layer when it should
playback or capture and setting the accuration sample rate.

The event consists of three parts, namely USB_STATE, STREAM_DIRECTION
and STREAM_STATE. For example:

g_audio_work: sent uac uevent USB_STATE=SET_INTERFACE STREAM_DIRECTION=IN STREAM_STATE=OFF
g_audio_work: sent uac uevent USB_STATE=SET_INTERFACE STREAM_DIRECTION=OUT STREAM_STATE=ON
g_audio_work: sent uac uevent USB_STATE=SET_SAMPLE_RATE STREAM_DIRECTION=OUT SAMPLE_RATE=44100

Signed-off-by: Ren Jianing <jianing.ren@rock-chips.com>
Change-Id: Ia01572d92d0c3ae40b19e772571282b8806da9e5
2020-07-15 09:31:34 +08:00
2019-02-10 00:33:21 +08:00
2020-03-03 07:33:01 +01:00
2020-07-06 20:34:02 +08:00
2020-07-02 10:21:15 +08:00
2020-06-09 22:19:16 +08:00
2019-02-10 00:33:21 +08:00
2019-02-10 00:33:21 +08:00
2019-08-29 19:45:37 +08:00
2019-08-29 19:45:37 +08:00

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.
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