linux-stable.git/include/linux/soundwire/sdw.h, branch v6.14

SoundWire: pass stream to compute_params()

2024-12-23T06:30:34+00:00

The stream parameter will be used in the follow up commit.
No function change.

Signed-off-by: Bard Liao 
Reviewed-by: Ranjani Sridharan 
Reviewed-by: Péter Ujfalusi 
Link: https://lore.kernel.org/r/20241218080155.102405-14-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

Soundwire: stream: program BUSCLOCK_SCALE

2024-12-23T06:30:33+00:00

We need to program bus clock scale to adjust the bus clock if current
bus clock doesn't fit the bandwidth.

Signed-off-by: Bard Liao 
Reviewed-by: Ranjani Sridharan 
Link: https://lore.kernel.org/r/20241218080155.102405-8-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

Soundwire: add sdw_slave_get_scale_index helper

2024-12-23T06:30:33+00:00

Currently, we only set peripheral frequency when the peripheral is
initialized. However, curr_dr_freq may change to get required bandwidth.
For example, curr_dr_freq may increase from 4.8MHz to 9.6MHz when the
4th stream is opened. Add a helper to get the scale index so that we can
get the scale index and program it.

Signed-off-by: Bard Liao 
Reviewed-by: Ranjani Sridharan 
Link: https://lore.kernel.org/r/20241218080155.102405-7-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

soundwire: add lane_used_bandwidth in struct sdw_bus

2024-12-23T06:30:33+00:00

To support multi-lane, we need to know how much bandwidth
is used on each lane. And to use the lane that has enough
bandwidth.

Signed-off-by: Bard Liao 
Reviewed-by: Péter Ujfalusi 
Reviewed-by: Pierre-Louis Bossart 
Link: https://lore.kernel.org/r/20241218080155.102405-4-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

soundwire: mipi_disco: read lane mapping properties from ACPI

2024-12-23T06:30:33+00:00

The DisCo for SoundWire 2.0 added support for the
'mipi-sdw-lane--mapping' property.

Co-developed-by: Chao Song 
Signed-off-by: Chao Song 
Signed-off-by: Bard Liao 
Link: https://lore.kernel.org/r/20241218080155.102405-3-yung-chuan.liao@linux.intel.com
Signed-off-by: Vinod Koul

Merge tag 'soundwire-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire

2024-11-27T21:38:09+00:00

Pull soundwire updates from Vinod Koul:

 - structure optimization of few bus structures and header updates

 - support for 2.0 disco spec

 - amd driver updates for acp revision, refactoring code and support for
   acp6.3

 - soft reset support for cadence driver

* tag 'soundwire-6.13-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/vkoul/soundwire: (24 commits)
  soundwire: Minor formatting fixups in sdw.h header
  soundwire: Update the includes on the sdw.h header
  soundwire: cadence: clear MCP BLOCK_WAKEUP in init
  soundwire: cadence: add soft-reset on startup
  soundwire: intel_auxdevice: add kernel parameter for mclk divider
  soundwire: mipi-disco: add support for DP0/DPn 'lane-list' property
  soundwire: mipi-disco: add new properties from 2.0 spec
  soundwire: mipi-disco: add comment on DP0-supported property
  soundwire: mipi-disco: add support for peripheral channelprepare timeout
  soundwire: mipi_disco: add support for clock-scales property
  soundwire: mipi-disco: add error handling for property array read
  soundwire: mipi-disco: remove DPn audio-modes
  soundwire: optimize sdw_dpn_prop
  soundwire: optimize sdw_dp0_prop
  soundwire: optimize sdw_slave_prop
  soundwire: optimize sdw_bus structure
  soundwire: optimize sdw_master_prop
  soundwire: optimize sdw_stream_runtime memory layout
  soundwire: mipi_disco: add MIPI-specific property_read_bool() helpers
  soundwire: Correct some typos in comments
  ...

soundwire: Minor formatting fixups in sdw.h header

2024-11-14T06:41:17+00:00

Fixup some minor formatting and whitespace in the sdw.h header file.

Signed-off-by: Charles Keepax 
Link: https://lore.kernel.org/r/20241112125646.590240-2-ckeepax@opensource.cirrus.com
Signed-off-by: Vinod Koul

soundwire: Update the includes on the sdw.h header

2024-11-14T06:41:17+00:00

There are quite a few things used in the sdw.h header that it relies on
the consumer to include. If something is used directly in the header it
should be included by the header. Update the includes to cover the
missing items, or add forward declarations for things that are only used
as pointers. Whilst making the change also alphabetise the list of
includes.

Signed-off-by: Charles Keepax 
Link: https://lore.kernel.org/r/20241112125646.590240-1-ckeepax@opensource.cirrus.com
Signed-off-by: Vinod Koul

ASoC: SDCA: add initial module

2024-10-17T17:42:11+00:00

Add new module for SDCA (SoundWire Device Class for Audio) support.
For now just add a parser to identify the SDCA revision and the
function mask.

Note that the SDCA definitions and related MIPI DisCo properties are
defined only for ACPI platforms and extracted with _DSD helpers. There
is currently no support for Device Tree in the specification, the
'depends on ACPI' reflects this design limitation. This might change
in a future revision of the specification but for SDCA 1.0 ACPI is the
only supported type of platform firmware.

The SDCA library is defined with static inline fallbacks, which will
allow for unconditional addition of SDCA support in common parts of
the code.

The design follows a four-step process:

1) Basic information related to Functions is extracted from MIPI DisCo
tables and stored in the 'struct sdw_slave'. Devm_ based memory
allocation is not allowed at this point prior to a driver probe, so we only
store the function node, address and type.

2) When a codec driver probes, it will register subdevices for each
Function identified in phase 1)

3) a driver will probe for each subdevice and addition parsing/memory
allocation takes place at this level. devm_ based allocation is highly
encouraged to make error handling manageable.

4) Before the peripheral device becomes physically attached, register
access is not permitted and the regmaps are cache-only. When
peripheral device is enumerated, the bus level uses the
'update_status' notification; after optional device-level
initialization, the codec driver will notify each of the subdevices so
that they can start interacting with the hardware.

Note that the context extracted in 1) should be arguably be handled
completely in the codec driver probe. That would however make it
difficult to use the ACPI information for machine quirks, and
e.g. select different machine driver and topologies as done for the
RT712_VB handling later in the series. To make the implementation of
quirks simpler, this patchset extracts a minimal amount of context
(interface revision and number/type of Functions) before the codec
driver probe, and stores this context in the scope of the 'struct
sdw_slave'.

The SDCA library can also be used in a vendor-specific driver without
creating subdevices, e.g. to retrieve the 'initialization-table'
values to write platform-specific values as needed.

For more technical details, the SDCA specification is available for
public downloads at https://www.mipi.org/mipi-sdca-v1-0-download

Signed-off-by: Pierre-Louis Bossart 
Reviewed-by: Péter Ujfalusi 
Signed-off-by: Bard Liao 
Link: https://patch.msgid.link/20241016102333.294448-4-yung-chuan.liao@linux.intel.com
Signed-off-by: Mark Brown

ASoC/soundwire: remove sdw_slave_extended_id

2024-10-17T17:42:10+00:00

This structure is used to copy information from the 'sdw_slave'
structures, it's better to create a flexible array of 'sdw_slave'
pointers and directly access the information. This will also help
access additional information stored in the 'sdw_slave' structure,
such as an SDCA context.

This patch does not add new functionality, it only modified how the
information is retrieved.

Signed-off-by: Pierre-Louis Bossart 
Reviewed-by: Péter Ujfalusi 
Signed-off-by: Bard Liao 
Link: https://patch.msgid.link/20241016102333.294448-3-yung-chuan.liao@linux.intel.com
Signed-off-by: Mark Brown