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| author | Rob Herring (Arm) <robh@kernel.org> | 2026-08-31 14:43:51 -0500 |
|---|---|---|
| committer | Dmitry Torokhov <dmitry.torokhov@gmail.com> | 2026-09-13 18:17:31 -0700 |
| commit | 55fc280e951ab2b39f3dcb640edc1b1eebc6d173 (patch) | |
| tree | f0b5f37b42fc13b9908a31b657c646b024231cdd /Documentation/userspace-api/media/intro.rst | |
| download | linux-stable-55fc280e951ab2b39f3dcb640edc1b1eebc6d173.tar.gz linux-stable-55fc280e951ab2b39f3dcb640edc1b1eebc6d173.zip | |
Input: tsc2007 - read "ti,poll-period" as u32grafted
The "ti,poll-period" property is documented as a normal uint32 cell.
The driver used a u64 helper, which makes the helper type disagree with
the schema even though the stored value is still small.
Read "ti,poll-period" with the u32 helper matching the documented DT
cell size.
Assisted-by: Codex:gpt-5-5
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Link: https://patch.msgid.link/20260831194352.1185860-1-robh@kernel.org
Signed-off-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'Documentation/userspace-api/media/intro.rst')
| -rw-r--r-- | Documentation/userspace-api/media/intro.rst | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/Documentation/userspace-api/media/intro.rst b/Documentation/userspace-api/media/intro.rst new file mode 100644 index 000000000..4a6bd665b --- /dev/null +++ b/Documentation/userspace-api/media/intro.rst @@ -0,0 +1,46 @@ +.. SPDX-License-Identifier: GPL-2.0 + +============ +Introduction +============ + +This document covers the Linux Kernel to Userspace API's used by video +and radio streaming devices, including video cameras, analog and digital +TV receiver cards, AM/FM receiver cards, Software Defined Radio (SDR), +streaming capture and output devices, codec devices and remote controllers. + +A typical media device hardware is shown at :ref:`typical_media_device`. + +.. _typical_media_device: + +.. kernel-figure:: typical_media_device.svg + :alt: typical_media_device.svg + :align: center + + Typical Media Device + +The media infrastructure API was designed to control such devices. It is +divided into five parts. + +1. The :ref:`first part <v4l2spec>` covers radio, video capture and output, + cameras, analog TV devices and codecs. + +2. The :ref:`second part <dvbapi>` covers the API used for digital TV and + Internet reception via one of the several digital tv standards. While it is + called as DVB API, in fact it covers several different video standards + including DVB-T/T2, DVB-S/S2, DVB-C, ATSC, ISDB-T, ISDB-S, DTMB, etc. The + complete list of supported standards can be found at + :c:type:`fe_delivery_system`. + +3. The :ref:`third part <remote_controllers>` covers the Remote Controller API. + +4. The :ref:`fourth part <media_controller>` covers the Media Controller API. + +5. The :ref:`fifth part <cec>` covers the CEC (Consumer Electronics Control) API. + +It should also be noted that a media device may also have audio components, like +mixers, PCM capture, PCM playback, etc, which are controlled via ALSA API. For +additional information and for the latest development code, see: +`https://linuxtv.org <https://linuxtv.org>`__. For discussing improvements, +reporting troubles, sending new drivers, etc, please mail to: `Linux Media +Mailing List (LMML) <http://vger.kernel.org/vger-lists.html#linux-media>`__. |
