[0/3] soundwire: clear bus clash/parity interrupt before the mask is enabled

Message

Bard Liao Jan. 26, 2021, 8:37 a.m. UTC

The SoundWire specification allows a Slave device to report a bus clash
or parity error with the in-band interrupt mechanism.
Unfortunately, on some platforms, these errors are randomly reported and
don't seem to be valid.
This series suggests the addition of a Master level quirk to discard such
interrupts. The quirk should in theory have been added at the Slave level,
but since the problem was detected with different generations of Slave
devices it's hard to point to a specific IP. The problem might also be
board-dependent and hence dealing with a Master quirk is simpler.

Bard Liao (2):
  soundwire: bus: clear bus clash interrupt before the mask is enabled
  soundwire: intel: add SDW_MASTER_QUIRKS_CLEAR_INITIAL_CLASH quirk

Pierre-Louis Bossart (1):
  soundwire: bus: clear parity interrupt before the mask is enabled

 drivers/soundwire/bus.c       | 19 +++++++++++++++++++
 drivers/soundwire/intel.c     |  3 +++
 include/linux/soundwire/sdw.h |  5 +++++
 3 files changed, 27 insertions(+)