[PATCH 0/2] ASoC: SOF: Fix IPC reliability and post-resume SoundWire init

[Cole Leavitt]

Two fixes for SOF IPC4 reliability issues observed on Lenovo ThinkPad
P16 Gen 3 (Arrow Lake-S, CS42L43 + CS35L56 over SoundWire):

1. Replace the broken delayed_ipc_tx_msg mechanism with a bounded retry
   loop. The old deferred dispatch silently drops messages during D0i3
   transitions, causing 500ms+ hangs per IPC chunk.

2. Add a platform ops callback (dai_link_hw_ready) so Intel HDA
   platforms can wait for SoundWire slave initialization before ALH
   copier setup. Without this, the DSP enters an unrecoverable wedged
   state when userspace opens a PCM before slaves finish re-enumerating
   after resume.

Tested on ThinkPad P16 Gen 3 with repeated suspend/resume cycles
and concurrent audio playback.

Cole Leavitt (2):
  ASoC: SOF: Replace IPC TX busy deferral with bounded retry
  ASoC: SOF: Add platform ops callback for DAI link hardware readiness

 sound/soc/sof/intel/cnl.c            | 17 ++---------
 sound/soc/sof/intel/hda-common-ops.c |  1 +
 sound/soc/sof/intel/hda-ipc.c        | 17 ++---------
 sound/soc/sof/intel/hda.c            | 44 ++++++++++++++++++++++++++++
 sound/soc/sof/intel/hda.h            | 14 ++++-----
 sound/soc/sof/intel/mtl.c            | 17 ++---------
 sound/soc/sof/ipc4-topology.c        |  8 +++++
 sound/soc/sof/ipc4.c                 | 17 +++++++++--
 sound/soc/sof/sof-priv.h             |  3 ++
 9 files changed, 83 insertions(+), 55 deletions(-)


base-commit: 2687c848e57820651b9f69d30c4710f4219f7dbf
-- 
2.52.0