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The imx8 config keeps causing issues: WARNING: unmet direct dependencies detected for SND_SOC_SOF_IMX8M Depends on [n]: SOUND [=y] && !UML && SND [=y] && SND_SOC [=m] && SND_SOC_SOF_TOPLEVEL [=y] && SND_SOC_SOF_IMX_TOPLEVEL [=y] && IMX_DSP [=n] Selected by [m]: - SND_SOC_SOF_IMX_OF [=m] && SOUND [=y] && !UML && SND [=y] && SND_SOC [=m] && SND_SOC_SOF_TOPLEVEL [=y] && SND_SOC_SOF_IMX_TOPLEVEL [=y] && SND_SOC_SOF_IMX8M_SUPPORT [=y] This is complicated by two drivers having dependencies on both platform specific drivers and the SND_SOC_SOF_OF framework code, and using an somewhat obscure method to build them the same way as the SOC_SOF_OF symbol (built-in or modular). My solution now ensures that the two drivers can only be enabled when the dependencies are met: - When the platform specific drivers are built-in, everything is fine, as SOC_SOF_OF is either =y or =m - When both are loadable modules, it also works, both for Kconfig and at runtime - When the hardware drivers are loadable modules or disabled, and SOC_SOF_OF=y, prevent the IMX_SOF_OF drivers from being turned on, as this would be broken. It seems that this is just an elaborate way to describe two tristate symbols that have straight dependencies, but maybe I'm missing some subtle point. It seems to always build for me now. Fixes:fe57a92c88("ASoC: SOF: Add missing dependency on IMX_SCU") Fixes:afb93d7165("ASoC: SOF: imx: Add i.MX8M HW support") Fixes:cb0312f61c("ASoC: SOF: imx: fix undefined reference issue") Fixes:afb93d7165("ASoC: SOF: imx: Add i.MX8M HW support") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Acked-by: Daniel Baluta <daniel.baluta@nxp.com> Link: https://lore.kernel.org/r/20200428212752.2901778-1-arnd@arndb.de 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.