On 7/27/18 4:14 AM, Shreyas NC wrote:
Currently, in the SoundWire subsystem, the concept of stream is limited
to a Master and one or more Slaves(Codecs). This series aims to add
support for multiple Master(s) sharing the same reference clock and
synchronized in the hardware.
This patch series adds:
- Fix to avoid duplicate stream state assignment
- Avoid incorrect stream release after configuring Master
- Fix to avoid bus lock acquired twice
- Helpers to lock bus instances part of the stream
- Boiler plate conversion of code to support a list of Master runtime
- Support multi link bank switch to support synchronization between
multiple masters
- Add Intel platform ops for pre/post bank switch
Additionally, as suggested by Vinod, the generic fixes are arranged
at the top of the series followed by the Documentation patch for
multi link support and then the multi link patches.
Looks good!
All patches
Acked-by: Pierre-Louis Bossart <pierre-louis.bossart@xxxxxxxxxxxxxxx>
Thanks Shreyas and Sanyog for the updates and taking care of the comments.
changes in v8:
- Check both m_rt_count and bus->multi_link flag for clean up after
single instance bankswitch as suggested by Pierre.
changes in v7:
- Fix the git bisect issue pointed by Pierre. Now, the initialization
of the m_rt_count and its modification/usage is split into 2 patches.
While the declaration and initialization is in one patch,
modification of the refcount and usage is in the multilink bankswitch
patch.
- Re-arrange the patches as suggested by Vinod
Sanyog Kale (3):
soundwire: Fix acquiring bus lock twice during master release
Documentation: soundwire: Add documentation for multi link
soundwire: Add support to lock across bus instances
Shreyas NC (6):
soundwire: Fix duplicate stream state assignment
soundwire: Fix incorrect exit after configuring stream
soundwire: Initialize completion for defer messages
soundwire: keep track of Masters in a stream
soundwire: Add support for multi link bank switch
soundwire: intel: Add pre/post bank switch ops
Vinod Koul (1):
soundwire: Handle multiple master instances in a stream
Documentation/driver-api/soundwire/stream.rst | 28 ++
drivers/soundwire/bus.c | 6 +
drivers/soundwire/bus.h | 4 +
drivers/soundwire/intel.c | 65 ++++
drivers/soundwire/stream.c | 511 +++++++++++++++++++-------
include/linux/soundwire/sdw.h | 12 +-
6 files changed, 489 insertions(+), 137 deletions(-)
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