[V7,0/8] Add SoundWire support for AMD platforms

Message

Vijendar Mukunda March 10, 2023, 4:25 p.m. UTC

ACP IP(v6.x) block has two SoundWire manager instance support.
This patchset adds support for AMD SoundWire manager driver.

Signed-off-by: Vijendar Mukunda <[e-mail]>

changes since v6:
	- remove pm suspend check in amd_resume_child_device()
	  and always return 0.
	- use same name convention for command and response
	  variables.

changes since v5:
	- replace loops logic with read_poll_timeout()
	  throughout the code.

changes since v4:
	- fix nit-picks in the code.
	- update naming convention for control word and response
	  buffer vairables.
	- drop pm_suspend check in prepare callback.
	- use return statement instead of returning ret variable.

changes since v3:
	- add usleep_range() in command/response implementation.
	- add usleep_range() in clock stop sequence.
	- modify usleep_range() values throughout the code.
	- remove unncessary debug statement from code.
	- update comment in probe() call.
	- fix timeout condition checks in the code.
	- drop "ret" variable in amd_disable_sdw_manager().

changes since v2:
	- Remove useless variable initializations.
	- Add helper function to interpret peripheral status.
	- Move runtime pm sequence to probe_work workqueue.
	- Use string "SoundWire" instead of "soundwire" in code.
	- Update comments in interrupt handler and probe sequence.
	- Rename "sdw_lock" as "acp_sdw_lock".
	- Remove __func__ from dev_dbg statements.

changes since v1:
	- Drop asoc tree based patches. will send asoc patches as a separate series.
	- Fixed double space errors.
	- Use dev instead of pci->dev.
	- Use SoundWire manager terminology.
	- Remove amd_sdw_compute_slave_ports() function and use exported
	  sdw_compute_slave_ports() function.
	- Remove unused variable "num_ports" from amd_manager structure.
	- Drop startup and shutdown dai callbacks.
	- Drop reset_page_addr callback. - Use relative address offset to program SoundWire manager
	  registers throughout the code.
	- Separate wake enable interrupt handling from slave status handling logic.
	- Use acp_mmio to program ACP common registers.
	- Use dai_runtime_array implementation in dai_ops.
	- Refactor port_ops callbacks.
	- Add comments in port_ops callbacks.
	- Add retry count logic in irq thread to address faulty case.
	- Add helper function to interpret command response.
	- Add generic bandwidth allocation dependency in Kconfig options.
	- Add comments for AMD SoundWire power modes.
	- Add missing timeout check in amd_init_sdw_manager callback.
	- Declare frameshape parameters in probe call.
	- Handle error case in clock stop sequence.
	- Add comments in pm_prepare and pm_ops callbacks.

Vijendar Mukunda (8):
  soundwire: export sdw_compute_slave_ports() function
  soundwire: amd: Add support for AMD Manager driver
  soundwire: amd: register SoundWire manager dai ops
  soundwire: amd: enable build for AMD SoundWire manager driver
  soundwire: amd: add SoundWire manager interrupt handling
  soundwire: amd: add runtime pm ops for AMD SoundWire manager driver
  soundwire: amd: handle SoundWire wake enable interrupt
  soundwire: amd: add pm_prepare callback and pm ops support

 drivers/soundwire/Kconfig                     |   10 +
 drivers/soundwire/Makefile                    |    4 +
 drivers/soundwire/amd_manager.c               | 1244 +++++++++++++++++
 drivers/soundwire/amd_manager.h               |  274 ++++
 drivers/soundwire/bus.h                       |    9 +
 .../soundwire/generic_bandwidth_allocation.c  |   12 +-
 include/linux/soundwire/sdw_amd.h             |  109 ++
 7 files changed, 1653 insertions(+), 9 deletions(-)
 create mode 100644 drivers/soundwire/amd_manager.c
 create mode 100644 drivers/soundwire/amd_manager.h
 create mode 100644 include/linux/soundwire/sdw_amd.h