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59322d3517
Check during cs35l56_system_resume() whether the firmware patch must be applied again. The FIRMWARE_MISSING flag in the PROTECTION_STATUS register indicates whether the firmware has been patched. In non-secure mode the FIRMWARE_MISSING flag is cleared at the end of dsp_work(). If it is set after system-resume we know that dsp_work() must be run again. In secure mode the pre-OS loader will have done the secure patching and cleared the FIRMWARE_MISSING flag. So this flag does not tell us whether firmware memory was lost. But the driver could only be downloading non-secure tunings, which is always safe to do. If the driver has control of RESET we will have asserted it during suspend so the firmware patch will have been lost. The driver would only have control of RESET in non-secure mode. Signed-off-by: Richard Fitzgerald <rf@opensource.cirrus.com> Link: https://lore.kernel.org/r/168122674550.26.8545058503709956172@mailman-core.alsa-project.org Signed-off-by: Mark Brown <broonie@kernel.org>
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.