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When sample rate changes, a reset operation is performed, and another reset occurs after debouncing. This results in less data being read by upper layer, thus triggering an underrun condition. Therefore, remove reset operation in rk_spdifrx_trigger. Meanwhile, when sample rate changes, disable dma enable, and after debouncing completes, notify upper layer via stop_xrun to restart, then enable dma to resume data transfer. Change-Id: Ie112ed83018722d069bd85d181f609c4bf865027 Signed-off-by: Zhong Shengquan <shengquan.zhong@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.