[PATCH 00/11] soundwire: amd: add ACP7B/7E/7F SoundWire manager support

[Vijendar Mukunda <Vijendar.Mukunda@amd.com>]

This series adds the first drop of SoundWire manager support for AMD
ACP7B, ACP7E, and ACP7F platforms. These revisions represent a
significant hardware evolution compared to the ACP7.0/7.1/7.2
generation:

- Up to four SoundWire manager instances (ACP_SDW0 through ACP_SDW3),
  compared to two in earlier generations.
- Banked registers on the manager side for clock frequency and frame
  shape parameters, enabling seamless transitions without bus
  re-enumeration.
- Dynamic clock scaling with both fixed frame shape and dynamic frame
  shape selection, enabling efficient bandwidth use across a wider
  range of bus clock frequencies.
- Extended sample rate and bit-depth support (48/96/192 kHz,
  S16/S24/S32) and a broader set of supported bus clock frequencies
  compared to ACP7.0/7.1/7.2.
- Up to 22 DAIs per manager with 11 TX and 11 RX data ports and
  8 TX and 8 RX DMA channels, compared to fewer ports and DMAs
  in earlier generations.
- SSP synchronisation tag propagation per bus transfer, required by
  the ACP7B/7E/7F hardware and absent in older revisions.
- Shared per-platform wake enable control across all manager instances
  with software serialisation to prevent races between concurrent
  managers during clock stop.
- Separate wake and bus-event IRQ paths, giving cleaner interrupt
  handling compared to earlier generations.
- Per-revision IO pad pin assignments with hardware-required restore
  order on D0 resume after power-off (ACP7B, ACP7E, and ACP7F each
  have distinct physical SoundWire clock and data pin mappings).
- Custom bandwidth allocation with dynamic frame-shape selection
  across candidate clock frequencies.

The new backend amd_acp7x_manager.c plugs into the hw_ops dispatch
framework introduced by the refactor series. It handles the full
driver lifecycle: IRQ handling and slave status processing, port
configuration, DAI PCM capability registration, host wake
enable/disable, clock-stop suspend and resume, and IO pad management.

Multi-manager synchronisation (GSYNC) is planned for a future series
once the required design work is complete; the existing implementation
is structured to accommodate it incrementally.

Two patches to generic_bandwidth_allocation.c are included: one
fixes the hwidth computation for the skipped block-offset slot
(a correctness fix relevant to any user of the generic algorithm),
and one exports the bandwidth helper functions needed by the new
ACP7x compute_params callback.

The interrupt_enabled guard used by ACP6.3/7.0/7.1/7.2 to prevent
new work from being queued during teardown is mirrored in the ACP7x
enable/disable and IRQ thread paths. The corresponding ASoC-side
patches that guard interrupt_enabled checks in the ACP7B/7E/7F IRQ
handler are not included in this series and will be posted separately.

Dependencies:

This series applies on top of the AMD SoundWire fix series (v5,
25 patches) and the AMD SoundWire refactor series (v3, 11 patches):
  https://lore.kernel.org/linux-sound/20261107154659.3358223-1-Vijendar.Mukunda@amd.com/
  https://lore.kernel.org/linux-sound/20261107161345.3411491-1-Vijendar.Mukunda@amd.com/

Vijendar Mukunda (11):
  soundwire: amd: add ACP7B/7E/7F register definitions and revision IDs
  soundwire: amd: add ACP7B/7E/7F hardware backend
  soundwire: amd: extend ctl_word_prep to set SSP_TAG for ACP7B/7E/7F
  soundwire: amd: add ACP7B/7E/7F DAI PCM capabilities in
    register_dais()
  soundwire: amd: enable host wake support for ACP7B/7E/7F
  soundwire: amd: add ACP7B/7E/7F clock-stop support
  soundwire: amd: add IO pad enable/disable for ACP7B/7E/7F D0/D3
    sequence
  soundwire: generic_bandwidth_allocation: fix hwidth for skipped block
    offset
  soundwire: generic_bandwidth_allocation: export bandwidth helper
    functions
  soundwire: amd: add ACP7x generic bandwidth allocation support
  soundwire: amd: add interrupt_enabled synchronization for ACP7B/7E/7F

 drivers/soundwire/Makefile                    |    2 +-
 drivers/soundwire/amd_acp7x_manager.c         | 1163 +++++++++++++++++
 drivers/soundwire/amd_init.c                  |  365 +++++-
 drivers/soundwire/amd_init.h                  |   13 +
 drivers/soundwire/amd_manager.h               |  297 +++++
 drivers/soundwire/amd_manager_common.c        |  130 +-
 drivers/soundwire/bus.h                       |   10 +
 .../soundwire/generic_bandwidth_allocation.c  |  129 +-
 include/linux/soundwire/sdw_amd.h             |   28 +-
 9 files changed, 2116 insertions(+), 21 deletions(-)
 create mode 100644 drivers/soundwire/amd_acp7x_manager.c

-- 
2.53.0