Received-SPF: pass (google.com: domain of linux-kernel-owner@vger.kernel.org designates 23.128.96.18 as permitted sender) client-ip=23.128.96.18;
From:   Parshuram Raju Thombare <pthombar@cadence.com>
To:     Parshuram Raju Thombare <pthombar@cadence.com>,
        "alexandre.belloni@bootlin.com" <alexandre.belloni@bootlin.com>,
        "slongerbeam@gmail.com" <slongerbeam@gmail.com>,
        "vitor.soares@synopsys.com" <vitor.soares@synopsys.com>
CC:     "linux-i3c@lists.infradead.org" <linux-i3c@lists.infradead.org>,
        "linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
        Milind Parab <mparab@cadence.com>,
        "praneeth@ti.com" <praneeth@ti.com>
Subject: RE: [PATCH v10 0/7] I3C mastership handover support
Thread-Topic: [PATCH v10 0/7] I3C mastership handover support
Thread-Index: AQHWxuBZNoKhWMffhki2cVmktFQEIap0Lk5w
Date:   Thu, 4 Mar 2021 10:06:32 +0000
Message-ID: <DM5PR07MB3196C2BCD48597E8CAD2DD34C1979@DM5PR07MB3196.namprd07.prod.outlook.com>
References: <1606716983-3645-1-git-send-email-pthombar@cadence.com>
In-Reply-To: <1606716983-3645-1-git-send-email-pthombar@cadence.com>
Accept-Language: en-US
Content-Language: en-US
Content-Type: text/plain; charset="us-ascii"
Content-Transfer-Encoding: quoted-printable
MIME-Version: 1.0
X-MS-Exchange-CrossTenant-Network-Message-Id: 52af3ddd-e42e-459b-16c1-08d8def52fef
X-MS-Exchange-CrossTenant-originalarrivaltime: 04 Mar 2021 10:06:32.3907
 (UTC)
X-MS-Exchange-CrossTenant-fromentityheader: Hosted
X-MS-Exchange-CrossTenant-id: d36035c5-6ce6-4662-a3dc-e762e61ae4c9
X-MS-Exchange-CrossTenant-mailboxtype: HOSTED
X-MS-Exchange-CrossTenant-userprincipalname: TjD7FGH4OvDgBStVFbSO7Dzc+JHgj1uuM9IqO6IG3v5egHKxZU2/xzSoTT5xnh79xXwRbMBgVyPYD7q1kSqzFj8ODGJ3dF8mR3SF3DzoV3c=
X-MS-Exchange-Transport-CrossTenantHeadersStamped: DS7PR07MB7704
X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.369,18.0.761
 definitions=2021-03-04_03:2021-03-03,2021-03-04 signatures=0
X-Proofpoint-Spam-Details: rule=outbound_check_notspam policy=outbound_check score=0
 lowpriorityscore=0 impostorscore=0 mlxscore=0 suspectscore=0
 mlxlogscore=999 bulkscore=0 adultscore=0 phishscore=0 malwarescore=0
 spamscore=0 clxscore=1015 priorityscore=1501 classifier=spam adjust=0
 reason=mlx scancount=1 engine=8.12.0-2009150000
 definitions=main-2103040043
Precedence: bulk
List-ID: <linux-kernel.vger.kernel.org>
X-Mailing-List: linux-kernel@vger.kernel.org

Ping !

>-----Original Message-----
>From: Parshuram Thombare <pthombar@cadence.com>
>Sent: Monday, November 30, 2020 11:46 AM
>To: alexandre.belloni@bootlin.com; slongerbeam@gmail.com;
>vitor.soares@synopsys.com
>Cc: linux-i3c@lists.infradead.org; linux-kernel@vger.kernel.org; Milind Pa=
rab
><mparab@cadence.com>; praneeth@ti.com; Parshuram Raju Thombare
><pthombar@cadence.com>
>Subject: [PATCH v10 0/7] I3C mastership handover support
>
>Main changes between v9 and v10 are:
>- Fix build failure reported by kernel test robot
>
>Main changes between v8 and v9 are:
>- Fix NULL dereference issue in current_master_show when
>  cat'ing sysfs key current_master for secondary master
>  before primary master gets initialized.
>
>Main changes between v7 and v8 are:
>- Document format changed from table to DOT diagram
>- Appropriate names for few functions
>- Moved mastership request process entirely to the driver
>- Reuse of i3c_master_add_i3c_dev_locked in core defslvs
>  processing
>
>Main changes between v6 and v7 are:
>- Added separate functions for main and secondary
>  master initialization
>- Secondary master initialization don't wait for
>  DEFSLSVS.
>- 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
>  machines.
>- 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 (7):
>  i3c: master: master initialization flow 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 +
> .../driver-api/i3c/master-initialization-flow.rst  |  187 ++++++++
> drivers/i3c/master.c                               |  497 +++++++++++++++=
+++--
> drivers/i3c/master/dw-i3c-master.c                 |    4 +-
> drivers/i3c/master/i3c-master-cdns.c               |  329 ++++++++++++-
> drivers/i3c/master/mipi-i3c-hci/core.c             |    4 +-
> include/linux/i3c/master.h                         |   23 +-
> 7 files changed, 970 insertions(+), 75 deletions(-)
> create mode 100644 Documentation/driver-api/i3c/master-initialization-flo=
w.rst