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| author | Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com> | 2025-06-12 17:28:33 +0200 |
|---|---|---|
| committer | Jakub Kicinski <kuba@kernel.org> | 2025-06-13 18:21:57 -0700 |
| commit | c035e736038045b411cb368e63f07bc2f5dbc0e1 (patch) | |
| tree | 425a15cc279b0788cc5998193289e0db63f7db5d /Documentation | |
| parent | bd1d76a6f18f2222dc08c5aa9ebcd0445111a27d (diff) | |
| download | net-c035e736038045b411cb368e63f07bc2f5dbc0e1.tar.gz | |
dpll: add phase-offset-monitor feature to netlink spec
Add enum dpll_feature_state for control over features.
Add dpll device level attribute:
DPLL_A_PHASE_OFFSET_MONITOR - to allow control over a phase offset monitor
feature. Attribute is present and shall return current state of a feature
(enum dpll_feature_state), if the device driver provides such capability,
otherwie attribute shall not be present.
Reviewed-by: Aleksandr Loktionov <aleksandr.loktionov@intel.com>
Reviewed-by: Milena Olech <milena.olech@intel.com>
Reviewed-by: Jiri Pirko <jiri@nvidia.com>
Signed-off-by: Arkadiusz Kubalewski <arkadiusz.kubalewski@intel.com>
Acked-by: Vadim Fedorenko <vadim.fedorenko@linux.dev>
Link: https://patch.msgid.link/20250612152835.1703397-2-arkadiusz.kubalewski@intel.com
Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'Documentation')
| -rw-r--r-- | Documentation/driver-api/dpll.rst | 18 | ||||
| -rw-r--r-- | Documentation/netlink/specs/dpll.yaml | 24 |
2 files changed, 42 insertions, 0 deletions
diff --git a/Documentation/driver-api/dpll.rst b/Documentation/driver-api/dpll.rst index e6855cd37e8525..195e1e5d9a5877 100644 --- a/Documentation/driver-api/dpll.rst +++ b/Documentation/driver-api/dpll.rst @@ -214,6 +214,24 @@ offset values are fractional with 3-digit decimal places and shell be divided with ``DPLL_PIN_PHASE_OFFSET_DIVIDER`` to get integer part and modulo divided to get fractional part. +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. + + =============================== ======================== + ``DPLL_A_PHASE_OFFSET_MONITOR`` attr state of a feature + =============================== ======================== + Embedded SYNC ============= diff --git a/Documentation/netlink/specs/dpll.yaml b/Documentation/netlink/specs/dpll.yaml index 115d1a8f50bd3e..3bd6851c1d3c9b 100644 --- a/Documentation/netlink/specs/dpll.yaml +++ b/Documentation/netlink/specs/dpll.yaml @@ -240,6 +240,20 @@ definitions: integer part of a measured phase offset value. Value of (DPLL_A_PHASE_OFFSET % DPLL_PHASE_OFFSET_DIVIDER) is a fractional part of a measured phase offset value. + - + type: enum + name: feature-state + doc: | + Allow control (enable/disable) and status checking over features. + entries: + - + name: disable + doc: | + feature shall be disabled + - + name: enable + doc: | + feature shall be enabled attribute-sets: - @@ -293,6 +307,14 @@ attribute-sets: be put to message multiple times to indicate possible parallel quality levels (e.g. one specified by ITU option 1 and another one specified by option 2). + - + name: phase-offset-monitor + type: u32 + enum: feature-state + doc: Receive or request state of phase offset monitor feature. + If enabled, dpll device shall monitor and notify all currently + available inputs for changes of their phase offset against the + dpll device. - name: pin enum-name: dpll_a_pin @@ -483,6 +505,7 @@ operations: - temp - clock-id - type + - phase-offset-monitor dump: reply: *dev-attrs @@ -499,6 +522,7 @@ operations: request: attributes: - id + - phase-offset-monitor - name: device-create-ntf doc: Notification about device appearing |