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cf48926d8e
ALSA core blocks userspace for 10 seconds for PCM R/W default. Consider the situation BT-slave which acts as SLAVE mode, when BT-master offline sometime, the CLK lost, user have to wait the core timeout(10s), it's quite bad experience. This patch allows userspace to override the WAIT_TIME to recover more quickly from terminal audio stream. especially for stream which have no mechanism to detect the LINK offline. Usage: /# amixer -c 0 contents | grep Wait numid=43,iface=PCM,name='PCM Read Wait Time MS' numid=44,iface=PCM,name='PCM Write Wait Time MS' /# amixer -c 0 cset numid=43 500 numid=43,iface=PCM,name='PCM Read Wait Time MS' ; type=INTEGER,access=rw------,values=1,min=0,max=10000,step=1 : values=500 Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com> Change-Id: I36c03859d3d91552dc4247864fe6697624245b6c
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.
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.