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551626ec0a
The HDMI jack handling reports the state change always via snd_jack_report() whenever hdmi_present_sense() is called, even if the state itself doesn't change from the previous time. This is mostly harmless but still a bit confusing to user-space. This patch reduces such spurious jack state changes and reports only when the state really changed. Also, as a minor optimization, avoid overwriting the pin ELD data when the state is identical. Reviewed-by: Kai Vehmanen <kai.vehmanen@linux.intel.com> Signed-off-by: Takashi Iwai <tiwai@suse.de>
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.