[PATCH 0/4] ASoC/soundwire: log actual PING status on resume issues

[Bard Liao]

we've been stuck with problems in the dual-amplifier configurations where
one of the two devices seems to become UNATTACHED and never regains sync,
see https://github.com/thesofproject/linux/issues/3638.

This is a rather infrequent issue that may happen once or twice per month,
but still it remains a concern.

One possibility is that the device does lose sync but somehow our hardware
detection fails to see it resync.

This series just adds a basic read directly from the PING frames to help
confirm if yes/no the device regain sync.

The change is mainly on soundwire. @Mark, Could you ack the ASoC patch
if it looks good to you?

Pierre-Louis Bossart (4):
  soundwire: add read_ping_status helper definition in manager ops
  soundwire: intel/cadence: expose PING status in manager ops
  soundwire: add sdw_show_ping_status() helper
  ASoC: codecs: show PING status on resume failures

 drivers/soundwire/bus.c            | 32 ++++++++++++++++++++++++++++++
 drivers/soundwire/cadence_master.c |  8 ++++++++
 drivers/soundwire/cadence_master.h |  2 ++
 drivers/soundwire/intel.c          |  1 +
 include/linux/soundwire/sdw.h      |  5 +++++
 sound/soc/codecs/max98373-sdw.c    |  2 ++
 sound/soc/codecs/rt1308-sdw.c      |  2 ++
 sound/soc/codecs/rt1316-sdw.c      |  2 ++
 sound/soc/codecs/rt5682-sdw.c      |  2 ++
 sound/soc/codecs/rt700-sdw.c       |  2 ++
 sound/soc/codecs/rt711-sdca-sdw.c  |  2 ++
 sound/soc/codecs/rt715-sdca-sdw.c  |  2 ++
 sound/soc/codecs/rt715-sdw.c       |  2 ++
 13 files changed, 64 insertions(+)

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2.25.1