From: Sakari Ailus Date: Fri, 6 Feb 2026 09:38:18 +0000 (+0200) Subject: media: Documentation: Improve LINK_FREQ documentation X-Git-Url: http://git.ipfire.org/gitweb/index.cgi?a=commitdiff_plain;h=ef56c563c4b756c6ab7ee02ea5d3b7cb7b70748c;p=thirdparty%2Flinux.git media: Documentation: Improve LINK_FREQ documentation 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 Reviewed-by: Mirela Rabulea Reviewed-by: Jacopo Mondi Reviewed-by: Laurent Pinchart --- 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 ` 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: