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d956dfaf77
As the HDMI-audio/codec will cause the hang on bootup, the root
cause that kylin get the invalid master clock from i2s.
$cat/sys/kernel/debug/clk/clk_summary
..
i2s_pre 0 0 0 0 0
sclk_i2s 0 0 0 0 0
i2s_clkout 0 0 0 0 0
Since i2s clock selects io input clock by default, but the hardware
didn't supply the clock.
This patch will fix the sclk_i2s's parent on i2s_frac.
As following:
$cat/sys/kernel/debug/clk/clk_summary
..
i2s_src 1 1 594000000 0 0
i2s_frac 1 1 22579200 0 0
i2s_pre 2 2 22579200 0 0
sclk_i2s 1 1 22579200 0 0
As far, the audio can work with aplay/record on kylin.dts
Says:
(aplay /dev/urandom)
/* recording */
arecord -f cd -d 10 /tmp/audio.wav
/* playback */
aplay /tmp/audio.wav
Change-Id: I73534a0d763eb02fb55e000ce068d9d604bf20ed
Signed-off-by: Caesar Wang <wxt@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.
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.