On Fri Feb 6 11:38:18 2026 +0200, Sakari Ailus wrote:
> Add a reference to the LINK_FREQ control and clarify the meaning of the
> control as for C-PHY the matter is less obvious.
>
> Signed-off-by: Sakari Ailus <[email protected]>
> Reviewed-by: Mirela Rabulea <[email protected]>
> Reviewed-by: Jacopo Mondi <[email protected]>
> Reviewed-by: Laurent Pinchart <[email protected]>
Patch committed.
Thanks,
Sakari Ailus
Documentation/driver-api/media/tx-rx.rst | 3 ++-
Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst | 5 ++++-
2 files changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/Documentation/driver-api/media/tx-rx.rst
b/Documentation/driver-api/media/tx-rx.rst
index 22e1b13ecde9..7df2407817b3 100644
--- a/Documentation/driver-api/media/tx-rx.rst
+++ b/Documentation/driver-api/media/tx-rx.rst
@@ -93,7 +93,8 @@ where
* - variable or constant
- description
* - link_freq
- - The value of the ``V4L2_CID_LINK_FREQ`` integer64 menu item.
+ - The value of the :ref:`V4L2_CID_LINK_FREQ <v4l2-cid-link-freq>`
integer64
+ menu item.
* - nr_of_lanes
- Number of data lanes used on the CSI-2 link.
* - 2
diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst
b/Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst
index 6d516f041ca2..57c2baf34acf 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-image-process.rst
@@ -24,7 +24,10 @@ Image Process Control IDs
.. _v4l2-cid-link-freq:
``V4L2_CID_LINK_FREQ (integer menu)``
- The frequency of the data bus (e.g. parallel or CSI-2).
+ The fundamental frequency of the operating symbol rate (serial interfaces
+ such as CSI-2) or the sampling rate (parallel interfaces such as DVP or
+ Bt.565) of the data interface. For CSI-2, the frequency is equal to
+ _1 / (2 * UI)_.
.. _v4l2-cid-pixel-rate:
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