linux-kernel - Re: [PATCH net-next v6 0/3] dpll: add all inputs phase offset monitor

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Message-ID: <2ac62524-e45f-4ef6-a8b4-01adfd1391c2@linux.dev>
Date: Fri, 13 Jun 2025 16:52:01 +0100
From: Vadim Fedorenko <vadim.fedorenko@...ux.dev>
To: Arkadiusz Kubalewski <arkadiusz.kubalewski@...el.com>,
 donald.hunter@...il.com, kuba@...nel.org, davem@...emloft.net,
 edumazet@...gle.com, pabeni@...hat.com, horms@...nel.org, jiri@...nulli.us,
 anthony.l.nguyen@...el.com, przemyslaw.kitszel@...el.com,
 andrew+netdev@...n.ch, aleksandr.loktionov@...el.com,
 milena.olech@...el.com, corbet@....net
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
 intel-wired-lan@...ts.osuosl.org, linux-doc@...r.kernel.org
Subject: Re: [PATCH net-next v6 0/3] dpll: add all inputs phase offset monitor

On 12/06/2025 16:28, Arkadiusz Kubalewski wrote:
> Add dpll device level feature: phase offset monitor.
> 
> Phase offset measurement is typically performed against the current active
> source. However, some DPLL (Digital Phase-Locked Loop) devices may offer
> the capability to monitor phase offsets across all available inputs.
> The attribute and current feature state shall be included in the response
> message of the ``DPLL_CMD_DEVICE_GET`` command for supported DPLL devices.
> In such cases, users can also control the feature using the
> ``DPLL_CMD_DEVICE_SET`` command by setting the ``enum dpll_feature_state``
> values for the attribute.
> Once enabled the phase offset measurements for the input shall be returned
> in the ``DPLL_A_PIN_PHASE_OFFSET`` attribute.
> 
> Implement feature support in ice driver for dpll-enabled devices.
> 
> Verify capability:
> $ ./tools/net/ynl/pyynl/cli.py \
>   --spec Documentation/netlink/specs/dpll.yaml \
>   --dump device-get
> [{'clock-id': 4658613174691613800,
>    'id': 0,
>    'lock-status': 'locked-ho-acq',
>    'mode': 'automatic',
>    'mode-supported': ['automatic'],
>    'module-name': 'ice',
>    'type': 'eec'},
>   {'clock-id': 4658613174691613800,
>    'id': 1,
>    'lock-status': 'locked-ho-acq',
>    'mode': 'automatic',
>    'mode-supported': ['automatic'],
>    'module-name': 'ice',
>    'phase-offset-monitor': 'disable',
>    'type': 'pps'}]
> 
> Enable the feature:
> $ ./tools/net/ynl/pyynl/cli.py \
>   --spec Documentation/netlink/specs/dpll.yaml \
>   --do device-set --json '{"id":1, "phase-offset-monitor":"enable"}'
> 
> Verify feature is enabled:
> $ ./tools/net/ynl/pyynl/cli.py \
>   --spec Documentation/netlink/specs/dpll.yaml \
>   --dump device-get
> [
>   [...]
>   {'capabilities': {'all-inputs-phase-offset-monitor'},
>    'clock-id': 4658613174691613800,
>    'id': 1,
>   [...]
>    'phase-offset-monitor': 'enable',
>   [...]]
> 
> v6:
> - rebase.
> 
> Arkadiusz Kubalewski (3):
>    dpll: add phase-offset-monitor feature to netlink spec
>    dpll: add phase_offset_monitor_get/set callback ops
>    ice: add phase offset monitor for all PPS dpll inputs
> 
>   Documentation/driver-api/dpll.rst             |  18 ++
>   Documentation/netlink/specs/dpll.yaml         |  24 +++
>   drivers/dpll/dpll_netlink.c                   |  69 ++++++-
>   drivers/dpll/dpll_nl.c                        |   5 +-
>   .../net/ethernet/intel/ice/ice_adminq_cmd.h   |  20 ++
>   drivers/net/ethernet/intel/ice/ice_common.c   |  26 +++
>   drivers/net/ethernet/intel/ice/ice_common.h   |   3 +
>   drivers/net/ethernet/intel/ice/ice_dpll.c     | 193 +++++++++++++++++-
>   drivers/net/ethernet/intel/ice/ice_dpll.h     |   8 +
>   drivers/net/ethernet/intel/ice/ice_main.c     |   4 +
>   include/linux/dpll.h                          |   8 +
>   include/uapi/linux/dpll.h                     |  12 ++
>   12 files changed, 384 insertions(+), 6 deletions(-)
> 

Acked-by: Vadim Fedorenko <vadim.fedorenko@...ux.dev>