17c9b6ec35
Extend hdac_ext_link to store information needed for ALT links. Follow-up patches will include more functional patches for power-up and down. Note that this patch suggests the use of an 'eml_lock' to serialize access to shared registers. SoundWire-specific sequence require the lock to be taken at a higher level, as a result the helpers added in follow-up patches will provide 'unlocked' versions when needed. Also note that the low-level sequences with the 'hdaml_' prefix are taken directly from the hardware specifications - naming conventions included. The code will be split in two, with locking and linked-list management handled separately to avoid mixing required hardware setup and Linux-based resource management. Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> Reviewed-by: Rander Wang <rander.wang@intel.com> Reviewed-by: Péter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Ranjani Sridharan <ranjani.sridharan@linux.intel.com> Signed-off-by: Peter Ujfalusi <peter.ujfalusi@linux.intel.com> Reviewed-by: Takashi Iwai <tiwai@suse.de> Link: https://lore.kernel.org/r/20230404104127.5629-7-peter.ujfalusi@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 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.