From: Sakari Ailus Date: Tue, 17 Oct 2023 10:31:19 +0000 (+0300) Subject: media: Documentation: BT.601 is not a bus X-Git-Url: http://git.maquefel.me/?a=commitdiff_plain;h=cff18d8f8bf158701da815c8443c2363abb945ad;p=linux.git media: Documentation: BT.601 is not a bus BT.601 is not actually a bus specification, leaving parallel bus without a specification to refer to. Fix this. Signed-off-by: Sakari Ailus Signed-off-by: Hans Verkuil --- diff --git a/Documentation/driver-api/media/camera-sensor.rst b/Documentation/driver-api/media/camera-sensor.rst index 7a3c610e4c7bf..b4920b34cebcc 100644 --- a/Documentation/driver-api/media/camera-sensor.rst +++ b/Documentation/driver-api/media/camera-sensor.rst @@ -9,8 +9,8 @@ This document covers the in-kernel APIs only. For the best practices on userspace API implementation in camera sensor drivers, please see :ref:`media_using_camera_sensor_drivers`. -CSI-2 and parallel (BT.601 and BT.656) busses ---------------------------------------------- +CSI-2, parallel and BT.656 buses +-------------------------------- Please see :ref:`transmitter-receiver`. diff --git a/Documentation/driver-api/media/tx-rx.rst b/Documentation/driver-api/media/tx-rx.rst index e1e9258dd8624..7c70b9d106346 100644 --- a/Documentation/driver-api/media/tx-rx.rst +++ b/Documentation/driver-api/media/tx-rx.rst @@ -6,8 +6,8 @@ Pixel data transmitter and receiver drivers =========================================== V4L2 supports various devices that transmit and receive pixel data. Examples of -these devices include a camera sensor, a TV tuner and a parallel or a CSI-2 -receiver in an SoC. +these devices include a camera sensor, a TV tuner and a parallel, a BT.656 or a +CSI-2 receiver in an SoC. Bus types --------- @@ -22,12 +22,13 @@ the host SoC. It is defined by the `MIPI alliance`_. .. _`MIPI alliance`: https://www.mipi.org/ -Parallel -^^^^^^^^ +Parallel and BT.656 +^^^^^^^^^^^^^^^^^^^ -`BT.601`_ and `BT.656`_ are the most common parallel busses. +The parallel and `BT.656`_ buses transport one bit of data on each clock cycle +per data line. The parallel bus uses synchronisation and other additional +signals whereas BT.656 embeds synchronisation. -.. _`BT.601`: https://en.wikipedia.org/wiki/Rec._601 .. _`BT.656`: https://en.wikipedia.org/wiki/ITU-R_BT.656 Transmitter drivers