kernel/git/stable/linux.git/drivers/soundwire/intel.h, branch linux-6.3.y

soundwire: intel: split auxdevice to different file

2022-11-23T14:41:49+00:00

The auxdevice layer is completely generic, it should be split from intel.c which is only geared to the 'cnl' hw_ops now. Signed-off-by: Pierre-Louis Bossart Reviewed-by: Rander Wang Signed-off-by: Bard Liao Link: https://lore.kernel.org/r/20221111013135.38289-8-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: intel: add in-band wake callbacks in hw_ops

2022-11-23T14:41:49+00:00

No functionality change, only add indirection for in-band wake management helpers. Signed-off-by: Pierre-Louis Bossart Reviewed-by: Rander Wang Signed-off-by: Bard Liao Link: https://lore.kernel.org/r/20221111013135.38289-7-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: intel: add link power management callbacks in hw_ops

2022-11-23T14:41:49+00:00

No functionality change, only add indirection for link power management helpers. Signed-off-by: Pierre-Louis Bossart Reviewed-by: Rander Wang Signed-off-by: Bard Liao Link: https://lore.kernel.org/r/20221111013135.38289-6-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: intel: add bus management callbacks in hw_ops

2022-11-23T14:41:48+00:00

No functionality change, only add indirection for bus management helpers. Signed-off-by: Pierre-Louis Bossart Reviewed-by: Rander Wang Signed-off-by: Bard Liao Link: https://lore.kernel.org/r/20221111013135.38289-5-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: intel: add register_dai callback in hw_ops

2022-11-23T14:41:48+00:00

No functionality change, only add indirection for DAI registration helper. Signed-off-by: Pierre-Louis Bossart Reviewed-by: Rander Wang Signed-off-by: Bard Liao Link: https://lore.kernel.org/r/20221111013135.38289-4-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: intel: add debugfs callbacks in hw_ops

2022-11-23T14:41:48+00:00

No functionality change, only add indirection for debugfs helpers. Signed-off-by: Pierre-Louis Bossart Reviewed-by: Rander Wang Signed-off-by: Bard Liao Link: https://lore.kernel.org/r/20221111013135.38289-3-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: intel: start using hw_ops

2022-11-23T14:41:48+00:00

Before introducing new hardware with completely different register spaces and programming sequences, we need to abstract some of the existing routines in hw_ops that will be platform-specific. For now we only use the 'cnl' ops - after the first Intel platform with SoundWire capabilities. Rather than one big intrusive patch, hw_ops are introduced in this patch so show the dependencies between drivers. Follow-up patches will introduce callbacks for debugfs, power and bus management. Signed-off-by: Pierre-Louis Bossart Reviewed-by: Rander Wang Signed-off-by: Bard Liao Link: https://lore.kernel.org/r/20221111013135.38289-2-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: intel: skip suspend/resume/wake when link was not started

2021-08-23T12:10:33+00:00

The SoundWire Linux devices are created purely based on information provided by platform firmware (e.g. ACPI DSDT table). When the kernel finds a matching driver for the device address (_ADR), the probe will initialize required data structures and initialize pm ops. When the SoundWire link is started at a later point, the physical devices will synchronize on the SoundWire frames and report their attachment status, thereby triggering the enumeration and initialization of device registers. This two-step solution was a conscious design decision to allow e.g. a driver to use sideband mechanisms to turn power rails on. This can also allow OEMs to describe multiple platforms with the same DSDT table, the devices that are not physically present in hardware. The drawback of this approach is a bit of confusion, with more devices than are actually present in hardware. This results in 'ghost' devices, for which the driver successfully probes, but that will not generate any traffic on the bus. suspend-resume transitions are handled by drivers, and skipped when the devices are not physically present. This patch provides a work-around for a second-level of confusion in platform firmware: some platforms only use HDaudio links, but nevertheless expose SoundWire 'ghost' devices. This results in error messages in the Intel driver while trying to suspend/resume these links. The simplest solution is to add a boolean status flag to skip all suspend/resume/wake sequences if the link was never started. Signed-off-by: Pierre-Louis Bossart Signed-off-by: Bard Liao Link: https://lore.kernel.org/r/20210818024954.16873-3-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

soundwire: intel: move to auxiliary bus

2021-06-14T04:42:26+00:00

Now that the auxiliary_bus exists, there's no reason to use platform devices as children of a PCI device any longer. This patch refactors the code by extending a basic auxiliary device with Intel link-specific structures that need to be passed between controller and link levels. This refactoring is much cleaner with no need for cross-pointers between device and link structures. Note that the auxiliary bus API has separate init and add steps, which requires more attention in the error unwinding paths. The main loop needs to deal with kfree() and auxiliary_device_uninit() for the current iteration before jumping to the common label which releases everything allocated in prior iterations. Signed-off-by: Pierre-Louis Bossart Reviewed-by: Guennadi Liakhovetski Reviewed-by: Ranjani Sridharan Signed-off-by: Bard Liao Link: https://lore.kernel.org/r/20210511052132.28150-1-yung-chuan.liao@linux.intel.com Signed-off-by: Vinod Koul

ALSA: hda: move Intel SoundWire ACPI scan to dedicated module

2021-03-02T14:33:00+00:00

The ACPI scan capabilities is called from the intel-dspconfig as well as the SOF/HDaudio drivers. This creates dependencies and randconfig issues when HDaudio and SOF/SoundWire are not all configured as modules. To simplify Kconfig dependencies between HDAudio, SoundWire, SOF and intel-dspconfig, move the ACPI scan helpers to a dedicated module. This follows the same idea as NHLT helpers which are already handled as a dedicated module. The only functional change is that the kernel parameter to filter links is now handled by a different module, but that was only provided for developers needing work-arounds for early BIOS releases. Reported-by: Arnd Bergmann Signed-off-by: Pierre-Louis Bossart Reviewed-by: Kai Vehmanen Reviewed-by: Guennadi Liakhovetski Reviewed-by: Bard Liao Acked-by: Mark Brown Acked-by: Vinod Koul Link: https://lore.kernel.org/r/20210302003125.1178419-7-pierre-louis.bossart@linux.intel.com Signed-off-by: Takashi Iwai