linux/drivers/soundwire
Rander Wang aa79293517 soundwire: bus: fix io error when processing alert event
There are two types of io errors when processing alert event.

a) the Master detects an ALERT status for e.g. a jack event and
invokes the implementation-defined function in the Slave driver to
check the jack status. At this time the codec is just suspended, so io
registers can't be accessed.

b) when waking up from clock stop mode1 state, where the bus needs a
complete re-enumeration, Slave registers can't be accessed until the
enumeration is complete.

This patch resumes the Slave device and waits for initialization
complete when processing slave alert event, so that registers on the
Slave can be accessed without timeouts or io errors.

Signed-off-by: Rander Wang <rander.wang@intel.com>
Signed-off-by: Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com>
Link: https://lore.kernel.org/r/20200115000844.14695-9-pierre-louis.bossart@linux.intel.com
Signed-off-by: Vinod Koul <vkoul@kernel.org>
2020-02-25 15:57:02 +05:30
..
bus_type.c soundwire: bus: fix race condition with probe_complete signaling 2020-02-25 15:57:01 +05:30
bus.c soundwire: bus: fix io error when processing alert event 2020-02-25 15:57:02 +05:30
bus.h soundwire: bus: add helper to clear Slave status to UNATTACHED 2020-02-25 15:57:02 +05:30
cadence_master.c soundwire: cadence: fix kernel-doc parameter descriptions 2020-01-16 17:34:38 +05:30
cadence_master.h soundwire: cadence_master: make clock stop exit configurable on init 2019-10-24 17:22:01 +05:30
debugfs.c soundwire: add debugfs support 2019-08-23 12:01:02 +05:30
intel_init.c soundwire: intel: update stream callbacks for hwparams/free stream operations 2019-12-12 09:17:06 +05:30
intel.c soundwire: intel: free all resources on hw_free() 2020-02-18 14:09:52 +05:30
intel.h soundwire: intel: update stream callbacks for hwparams/free stream operations 2019-12-12 09:17:06 +05:30
Kconfig soundwire: qcom: add support for SoundWire controller 2020-01-14 11:57:47 +05:30
Makefile soundwire: qcom: add support for SoundWire controller 2020-01-14 11:57:47 +05:30
mipi_disco.c soundwire: mipi_disco: Switch to use fwnode_property_count_uXX() 2019-08-02 17:15:13 +05:30
qcom.c soundwire: qcom: add support for SoundWire controller 2020-01-14 11:57:47 +05:30
slave.c soundwire: bus: fix race condition with initialization_complete signaling 2020-02-25 15:57:02 +05:30
stream.c soundwire: stream: don't program ports when a stream that has not been prepared 2020-02-13 15:57:37 +05:30