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CONFIG_SND_PCM_PATTERN_DEBUG * MSB check * channel id * as much as more 0/1 stress PATTERN8(x) (0xa0 | (x)) PATTERN16(x) (0xab00 | (x)) PATTERN32(x) (0xabcabc00 | (x)) e.g. 16bit 4ch pattern: 0xab01 0xab02 0xab03 0xab04 0xab01 ... This pattern is only used for IOCTL_READ/WRITE, not suitable for MMAP. Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com> Change-Id: I96d9664460adeee13ac86558159b39c9ab0dabe8
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.