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b6f0f8c611
Slave Resume Situation:
i2s-tdm acts as slave, and the external device, such as dsp
acts as master.
aplay -D hw:0,0 --period-size=1024 --buffer-size=4096 t.wav &
echo mem > /sys/power/state
the aplay was freeze and system go to sleep.
press the power-key to wakeup system, and now the aplay will
resume playback.
But, there is a case the external dev resume too slow to provide
clk to i2s-tdm, so, we need add a delay to make it resume well.
e.g.
&i2s {
rockchip,resume-deferred-ms = <1000>;
};
Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com>
Change-Id: If9a82c8357cef23bd50305c585ee28794f45d347
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.