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Most of the SoundWire support issues come from bad ACPI information, or configuration reported by ACPI that are not supported by the SOF driver/topology. The users see a "No SoundWire machine driver found" message without any details, and the fallback to HDaudio w/ HDMI is used. We can reduce our support load with a clear dev_info() log that will give us a clear hint on the mismatch and why a machine driver/topology were not found. Example log on a MTL device: [ 13.158599] sof-audio-pci-intel-mtl 0000:00:1f.3: No SoundWire machine driver found for the ACPI-reported configuration: [ 13.158603] sof-audio-pci-intel-mtl 0000:00:1f.3: link 0 mfg_id 0x025d part_id 0x0713 version 0x3 [ 13.158606] sof-audio-pci-intel-mtl 0000:00:1f.3: link 1 mfg_id 0x025d part_id 0x1316 version 0x3 [ 13.158608] sof-audio-pci-intel-mtl 0000:00:1f.3: link 2 mfg_id 0x025d part_id 0x1316 version 0x3 In parallel, we will also provide an update to `alsa-info` to log all SoundWire peripherals found in ACPI tables. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Bard Liao <yung-chuan.liao@linux.intel.com> Link: https://lore.kernel.org/r/20240426153902.39560-5-pierre-louis.bossart@linux.intel.com 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 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.