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From: Parshuram Thombare <>
To: <>, <>
Cc:, Parshuram Thombare <>,,,,
Subject: [PATCH v7 0/7] I3C mastership handover support
Date: Mon, 11 May 2020 15:11:42 +0200
Message-ID: <> (raw)


As per the discussion with Boris sending v7 of 
patchset with changes mentioned in below changelog v6->v7.

Main changes between v6 and v7 are:
- Added separate functions for main and secondary
  master initialization
- Secondary master initialization don't wait for
- Change to use I2C device information from DTS,
  and corresponding changes in controller driver
  and I3C core DEFSLVS processing to ignore I2C
  devices received in DEFSLVS
- Reverted bus_init split
- Fixed formatting issues in document

Main changes between v5 and v6 are:
- Moved populate_bus() hook to master subsystem code.
- For secondary master initialization i3c_master_register
  spawan separate threads, as secondary master may have to
  wait for DEFSLVS and bus mastership.
- Populate bus info is based on DEFSLVS data and take care
  of hot plugged / unplugged I3C devices.
- Split bus_init into bus_init and master_set_info callbacks
- Moved mastership aquire and handover to separate state 
- Added DEFSLVS processing code.
- Moved back all locks in side the subsystem code.
- Secondary mastership support to Cadence I3C master
  controller driver
- Sysfs key 'i3c_acquire_bus' to acauire bus.
- NULL check for pool pointer in i3c_generic_ibi_free_pool.

Main changes between v4 and v5 are:
- Add populate_bus() hook
- Split i3c_master_register into init and register pair
- Split device information retrieval, let add partialy discovered devices
- Make i3c_master_set_info private
- Add separate function to register secondary master
- Reworked secondary master register in CDNS driver
- Export i3c_bus_set_mode

Main changes between v3 and v4 are:
- Reworked acquire bus ownership
- Refactored the code

Main changes between v2 and v3 are:
- Added DEFSLVS devices are registered from master driver
- Reworked I2C registering on secondary master side
- Reworked Mastership event is enabled/disabled globally (for all devices)

Main changes between initial version and v2 are:
- Reworked devices registration on secondary master side
- Reworked mastership event disabling/enabling
- Reworked bus locking during mastership takeover process
- Added DEFSLVS devices registration during initialization
- Fixed style issues

Parshuram Thombare

Parshuram Thombare (7):
  i3c: master: secondary master initialization document
  i3c: master: use i3c_master_register only for main master
  i3c: master: add i3c_secondary_master_register
  i3c: master: add mastership handover support
  i3c: master: add defslvs processing
  i3c: master: sysfs key for acquire bus
  i3c: master: mastership handover, defslvs processing in cdns
    controller driver

 Documentation/driver-api/i3c/index.rst        |   1 +
 .../i3c/secondary-master-initialization.rst   | 118 ++++
 drivers/i3c/master.c                          | 566 ++++++++++++++++--
 drivers/i3c/master/dw-i3c-master.c            |   2 +-
 drivers/i3c/master/i3c-master-cdns.c          | 377 +++++++++++-
 include/linux/i3c/master.h                    |  36 +-
 6 files changed, 1038 insertions(+), 62 deletions(-)
 create mode 100644 Documentation/driver-api/i3c/secondary-master-initialization.rst


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Thread overview: 17+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2020-05-11 13:11 Parshuram Thombare [this message]
2020-05-11 13:12 ` [PATCH v7 1/7] i3c: master: secondary master initialization document Parshuram Thombare
2020-05-11 16:05   ` Boris Brezillon
2020-05-12  5:03     ` Parshuram Raju Thombare
2020-05-12  7:35       ` Boris Brezillon
2020-05-11 13:13 ` [PATCH v7 2/7] i3c: master: use i3c_master_register only for main master Parshuram Thombare
2020-05-11 15:44   ` Boris Brezillon
2020-05-12  4:57     ` Parshuram Raju Thombare
2020-05-11 13:13 ` [PATCH v7 3/7] i3c: master: add i3c_secondary_master_register Parshuram Thombare
2020-05-11 16:14   ` Boris Brezillon
2020-05-12  6:42     ` Parshuram Raju Thombare
2020-05-11 13:14 ` [PATCH v7 4/7] i3c: master: add mastership handover support Parshuram Thombare
2020-05-11 16:38   ` Boris Brezillon
2020-05-12  6:24     ` Parshuram Raju Thombare
2020-05-11 13:15 ` [PATCH v7 5/7] i3c: master: add defslvs processing Parshuram Thombare
2020-05-11 13:16 ` [PATCH v7 6/7] i3c: master: sysfs key for acquire bus Parshuram Thombare
2020-05-11 13:17 ` [PATCH v7 7/7] i3c: master: mastership handover, defslvs processing in cdns controller driver Parshuram Thombare

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