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f981c02164
The plugins of dsnoop/dmix will be fault if this config is disable: ---- root@rk3506-buildroot:/etc# arecord -Ddefault -c 2 -r 16000 -fS16_LE /tmp/record.wav -vv ALSA lib pcm_direct.c:1504:(snd1_pcm_direct_initialize_poll_fd) unable to open timer 'hw:CLASS=3,SCLASS=0,CARD=0,DEV=0,SUBDEV=1' ALSA lib pcm_dsnoop.c:643:(snd_pcm_dsnoop_open) unable to initialize poll_fd arecord: main:850: audio open error: No such file or directory Therefore, we needs to enable it. before: text data bss dec hex filename49348892270232 114496 7319617 6fb041 vmlinux after: text data bss dec hex filename49449102272032 114944 7331886 6fe02e vmlinux Change-Id: I669e50141957546f35b3a0ede3e1b7928ca14b9c Signed-off-by: Xing Zheng <zhengxing@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.
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.