Takashi Iwai
c7273bd6c1
The pin shutup callback seems working well on some devices while it does harm on some other devices; e.g. Lenovo laptops show often the noises at (runtime) PM with the pin shutup enabled. Currently, the only way to disable the pin shutup is to hard-code spec->shutup = alc_no_shutup; in the fixup, and this makes the debugging harder for normal users. For allowing users to test the similar effect without recompiling the kernel, this patch adds a new hint string "shutup". It's a boolean value, and by passing false to this, user can turn off the pin shutup call. For example, to turn off the shutup on Lenovo P50, create a "firmware patch" file (e.g. /lib/firmware/alsa/lenovo-p50) containing the following lines: [codec] 0x10ec0298 0x17aa222e 0 [hint] shutup = no and pass the file via patch option of snd-hda-intel module (e.g. patch=alsa/lenovo-p50). 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.
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.