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945865a0dd
Currently, on ASUS projects, the TAS2781 codec attaches the speaker GPIO
to the first tasdevice_priv instance using devm. This causes
tas2781_read_acpi to fail on subsequent probes since the GPIO is already
managed by the first device. This causes a failure on Xbox Ally X,
because it has two amplifiers, and prevents us from quirking both the
Xbox Ally and Xbox Ally X in the realtek codec driver.
It is unnecessary to attach the GPIO to a device as it is static.
Therefore, instead of attaching it and then reading it when loading the
firmware, read its value directly in tas2781_read_acpi and store it in
the private data structure. Then, make reading the value non-fatal so
that ASUS projects that miss a speaker pin can still work, perhaps using
fallback firmware.
Fixes:
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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 reStructuredText 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.