Commit Graph

105 Commits

Author SHA1 Message Date
Steve Longerbeam 9bf656e1a6 media: docs-rst: Clarify duration of LP-11 mode
Add a sentence that makes it more clear when the CSI-2 transmitter
must, if possible, exit LP-11 mode. That is, maintain LP-11 mode
until stream on, at which point the transmitter activates the clock
lane and transition to HS mode.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-08-15 08:15:25 -03:00
Sakari Ailus 50435d8dbc media: v4l: Documentation: Serial busses use parallel mbus codes
When the support for serial busses was introduced in V4L2, it was decided
to use the existing parallel bus media bus pixel codes to describe them.
While this was a practical choice at the time, it necessitates choosing
which one of the many parallel mbus pixel codes to use, for on the serial
busses these formats are effectively all equivalent.

The practice has always been to use the pixel code that describes a bus
that transfers a single sample per clock. Document this.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-08-15 08:08:47 -03:00
Ezequiel Garcia 173f6eacc8 media: v4l: ctrls: Add debug messages
Currently, the v4l2 control code is a bit silent on errors.
Add debug messages on (hopefully) most of the error paths.

Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-07-25 06:26:49 -04:00
Luca Ceresoli 40208924b9 media: docs: v4l2-controls: remove outdated paragraph
This paragraph was added by commit a42b57f5aa ("V4L/DVB: Documentation:
add v4l2-controls.txt documenting the new controls API") back in 2010, when
the controls API has been improved. Nowadays it is a bit anachronistic, so
remove it.

The same information is stated in up-to-date wording a few paragraphs later

> You’re done! And this is sufficient for most of the drivers we have. No
> need to do any validation of control values, or implement QUERYCTRL,
> QUERY_EXT_CTRL and QUERYMENU. And G/S_CTRL as well as G/TRY/S_EXT_CTRLS
> are automatically supported.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-06-21 17:06:25 -04:00
Luca Ceresoli 025b941132 media: docs: v4l2-controls: document file to include
The tutorial in this section is almost complete, add the one missing bit.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-06-21 17:05:18 -04:00
Luca Ceresoli 270c0024a3 media: docs: v4l2-controls: convert code blocks to C
All these code blocks contain C code, enable C formatting for a nicer
reading.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-06-21 17:04:57 -04:00
Luca Ceresoli 6b623dbfbd media: docs: v4l2-controls: add links to functions
This section lacks links to functions. Add one to simplify reading.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-06-21 17:04:25 -04:00
Luca Ceresoli e36160b842 media: docs: v4l2-controls: rearrange control initialization sequence
The code snippet showing how to add controls to the driver’s top-level
struct is present twice, but only the second time it is split in the V4L2
and subdev cases. Consolidate everything at the beginning.

Also remove the "Where foo->bar is of type struct baz" sentences, this
obvious from the code.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-06-21 17:04:03 -04:00
Luca Ceresoli 9e75efb0f2 media: docs: v4l2-controls: add links to structs
This section lacks links to struct definitions. Add one where each struct
is introduced.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-06-21 17:03:16 -04:00
Marc Gonzalez e96a8819a6 media: docs: fix minor typos
Fix minor typos in the DVB demux documentation.

Signed-off-by: Marc Gonzalez <marc.w.gonzalez@free.fr>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-06-05 11:31:51 -04:00
Shuah Khan 6e1d824e7a media: Media Device Allocator API
Media Device Allocator API to allows multiple drivers share a media device.
This API solves a very common use-case for media devices where one physical
device (an USB stick) provides both audio and video. When such media device
exposes a standard USB Audio class, a proprietary Video class, two or more
independent drivers will share a single physical USB bridge. In such cases,
it is necessary to coordinate access to the shared resource.

Using this API, drivers can allocate a media device with the shared struct
device as the key. Once the media device is allocated by a driver, other
drivers can get a reference to it. The media device is released when all
the references are released.

Signed-off-by: Shuah Khan <shuah@kernel.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-04-22 11:18:26 -04:00
Mauro Carvalho Chehab adf48e3f1f media: Documentation: fix several typos
Use codespell to fix lots of typos over frontends.

Manually verified to avoid false-positives.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2019-03-01 09:54:06 -05:00
Mauro Carvalho Chehab f2ac8ce823 media: docs: brainless mass add SPDX headers to all media files
All Documentation files outside the uAPI are all licensed with,
at least, GPL 2.0. So, mark them as such.

The ondes at media/uapi are at least GFDL 1.1+.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-12-05 10:40:34 -05:00
Mauro Carvalho Chehab 18e6830a63 media: remove text encoding from rst files
This is not needed there. Also, the same UTF-8 encoding should
be used on all documents.

Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-12-05 10:37:18 -05:00
Linus Torvalds b3491d8430 media updates for v4.20-rc1
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Merge tag 'media/v4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media

Pull new experimental media request API from Mauro Carvalho Chehab:
 "A new media request API

  This API is needed to support device drivers that can dynamically
  change their parameters for each new frame. The latest versions of
  Google camera and codec HAL depends on such feature.

  At this stage, it supports only stateless codecs.

  It has been discussed for a long time (at least over the last 3-4
  years), and we finally reached to something that seem to work.

  This series contain both the API and core changes required to support
  it and a new m2m decoder driver (cedrus).

  As the current API is still experimental, the only real driver using
  it (cedrus) was added at staging[1]. We intend to keep it there for a
  while, in order to test the API. Only when we're sure that this API
  works for other cases (like encoders), we'll move this driver out of
  staging and set the API into a stone.

  [1] We added support for the vivid virtual driver (used only for
  testing) to it too, as it makes easier to test the API for the ones
  that don't have the cedrus hardware"

* tag 'media/v4.20-2' of git://git.kernel.org/pub/scm/linux/kernel/git/mchehab/linux-media: (53 commits)
  media: dt-bindings: Document the Rockchip VPU bindings
  media: platform: Add Cedrus VPU decoder driver
  media: dt-bindings: media: Document bindings for the Cedrus VPU driver
  media: v4l: Add definition for the Sunxi tiled NV12 format
  media: v4l: Add definitions for MPEG-2 slice format and metadata
  media: videobuf2-core: Rework and rename helper for request buffer count
  media: v4l2-ctrls.c: initialize an error return code with zero
  media: v4l2-compat-ioctl32.c: add missing documentation for a field
  media: media-request: update documentation
  media: media-request: EPERM -> EACCES/EBUSY
  media: v4l2-ctrls: improve media_request_(un)lock_for_update
  media: v4l2-ctrls: use media_request_(un)lock_for_access
  media: media-request: add media_request_(un)lock_for_access
  media: vb2: set reqbufs/create_bufs capabilities
  media: videodev2.h: add new capabilities for buffer types
  media: buffer.rst: only set V4L2_BUF_FLAG_REQUEST_FD for QBUF
  media: v4l2-ctrls: return -EACCES if request wasn't completed
  media: media-request: return -EINVAL for invalid request_fds
  media: vivid: add request support
  media: vivid: add mc
  ...
2018-10-31 10:53:29 -07:00
Hans Verkuil 81e33279d1 media: cec-core.rst: improve cec_transmit_done documentation
Clarify that calling cec_transmit_done can start a new transmit and
that you should put the hardware in a state that allows for a new
transmit before calling this function.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-10-05 11:04:39 -04:00
Steve Longerbeam c4a570179c media: v4l2-subdev.rst: Update doc regarding subdev descriptors
Update the doc to describe the new method of adding subdevice
descriptors to async notifiers.

Signed-off-by: Steve Longerbeam <slongerbeam@gmail.com>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-10-04 16:00:20 -04:00
Sakari Ailus 496f6f4d8a media: doc: Add media-request.h header to documentation build
media-request.h has been recently added; add it to the documentation build
as well.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-08-31 11:05:50 -04:00
Hans Verkuil 6aecad6267 media: cec: improve cec status documentation
Clarify the description of status bits, particularly w.r.t. ERROR and NACK.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
2018-05-25 15:34:50 -04:00
Luca Ceresoli eed5756519 media: doc: fix ReST link syntax
There is a ':' in excess, resulting in an unwanted ':' in the rendered
output.

Signed-off-by: Luca Ceresoli <luca@lucaceresoli.net>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2018-04-04 06:12:52 -04:00
Hans Verkuil 6902c88a46 media: cec-core.rst: document the error injection ops
Document the new core error injection callbacks.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2018-03-22 08:00:01 -04:00
Mauro Carvalho Chehab 9f577d6db5 media: dvb kAPI docs: document dvb_vb2.h
Document the data structures and functions inside this kAPI header.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-12-29 08:31:25 -05:00
Mauro Carvalho Chehab fada193559 media: move dvb kAPI headers to include/media
Except for DVB, all media kAPI headers are at include/media.

Move the headers to it.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-12-28 13:16:01 -05:00
Mauro Carvalho Chehab 4839c58f03 media: v4l2-dev: convert VFL_TYPE_* into an enum
Using enums makes easier to document, as it can use kernel-doc
markups. It also allows cross-referencing, with increases the
kAPI readability.

Please notice that now cx88_querycap() has to have a default for
the VFL type, as there are more types than supported by the driver.

Acked-By: Mike Isely <isely@pobox.com>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-12-18 11:49:40 -05:00
Mauro Carvalho Chehab 66f1e6078e media: v4l2-event.rst: improve events description
Both v4l2-event.rst and v4l2-event.h have an overview of
events, but there are some inconsistencies there:

- at v4l2-event, the event's ring buffer is called kevent. Its
  name is, instead, v4l2_kevent;

- Some things are mentioned on both places (with different words),
  others are either on one of the files.

In order to cleanup this mess, put everything at v4l2-event.rst
and improve it to be a little more coherent and to have cross
references.

Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-12-18 10:35:46 -05:00
Mauro Carvalho Chehab cccd6fa435 media: rc-core.rst: add an introduction for RC core
The RC core does several assumptions, but those aren't documented
anywhere, with could make harder for ones that want to understand
what's there.

So, add an introduction explaining the basic concepts of RC and
how they're related to the RC core implementation.

Acked-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Acked-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-12-18 10:15:29 -05:00
Sean Young a6ddd4fecb media: lirc: remove last remnants of lirc kapi
rc-core has replaced the lirc kapi many years ago, and now with the last
driver ported to rc-core, we can finally remove it.

Note this has no effect on userspace.

All future IR drivers should use the rc-core api.

Signed-off-by: Sean Young <sean@mess.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-12-14 10:35:20 -05:00
Hans Verkuil 15ae0be9c6 media: cec-core.rst: document the new adap_monitor_pin_enable op
Document what this op does.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-12-08 11:10:37 -05:00
Sakari Ailus d65b34135f media: v4l: async: Add V4L2 async documentation to the documentation build
The V4L2 async wasn't part of the documentation build. Fix this.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se>
Acked-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-10-31 13:43:23 -04:00
Mauro Carvalho Chehab b5b03a2009 media: dvb-net.rst: document DVB network kAPI interface
That's the last DVB kAPI that misses documentation.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-10-11 13:22:09 -04:00
Mauro Carvalho Chehab 8c6b18631f media: dtv-demux.rst: parse other demux headers with kernel-doc
Now that we have kernel-doc markups at dvb_demux.h and dmxdev.h,
parse them.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-10-11 13:21:41 -04:00
Mauro Carvalho Chehab 1607b8b574 media: dtv-demux.rst: minor markup improvements
Add a cross-reference to a mentioned structure and split
the kernel-doc stuff on a separate chapter.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-10-11 13:07:46 -04:00
Mauro Carvalho Chehab b2fc98fc91 media: dtv-frontend.rst fix a typo: algoritms -> algorithms
WARNING: 'algoritms' may be misspelled - perhaps 'algorithms'?
+responsible for tuning the device. It supports multiple algoritms to

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-10-11 13:06:30 -04:00
Mauro Carvalho Chehab 5b3b8c81b4 media: dtv-core.rst: split into multiple files
Instead of document all kAPI into a single file, split it
on multiple ones. That makes easier to maintain each part.

As a side effect, it will produce multiple html pages, with
is a good idea.

No changes at the text. Just some chapter levels changed.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-10-11 13:05:44 -04:00
Mauro Carvalho Chehab 7af90c04cc media: dtv-core.rst: add chapters and introductory tests for common parts
Better document the DVB common parts by adding two sections
and an introductory text for each.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-10-11 13:01:53 -04:00
Hans Verkuil da634f623e media: cec-core.rst/cec-ioc-receive.rst: clarify CEC_TX_STATUS_ERROR
CEC_TX_STATUS_ERROR can be used if the HW cannot tell LOST_ARB and
LOW_DRIVE apart, or when some other error occurs. It is not a
replacement for NACK.

So the hardware must be able to tell the difference between OK, NACK and
'something else'.

Clarify the documentation (both public and kernel API) on this point.

Also fix two small typos (this messages -> this message).

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-09-23 07:41:38 -04:00
Mauro Carvalho Chehab 74c9751c83 media: v4l2-event.rst: adjust table to fit on PDF output
The tables there don't quite fit on PDF output.

Adjust it by adding a tabularcolumns macro.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-09-05 06:28:09 -04:00
Sakari Ailus 3cdb977ec8 media: docs-rst: media: Document broken frame handling in stream stop for CSI-2
Some CSI-2 transmitters will finish an ongoing frame whereas others will
not. Document that receiver drivers should not assume a particular
behaviour but to work in both cases.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-08-27 07:11:11 -04:00
Mauro Carvalho Chehab 177894bfac media: cec-core: fix a Sphinx warning
/devel/v4l/patchwork/Documentation/media/kapi/cec-core.rst:369: WARNING: Title underline too short.

CEC Notifier framework
-----------------

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-07-19 14:29:06 -04:00
Hans Verkuil ab2ec7a53c media: cec-core.rst: include cec-pin.h and cec-notifier.h
Include the CEC pin framework documentation by reading cec-pin.h.
Include the CEC notifier framework documentation by reading cec-notifier.h.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-07-18 12:58:24 -03:00
Hans Verkuil f987cde233 media: cec-core.rst: document the adap_free callback
Document what this callback does.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Reviewed-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-07-18 12:47:54 -03:00
Mauro Carvalho Chehab f91df2e4fc media: dtv-core.rst: complete description of a demod driver
A section talking about demod statistics implementation was
recently added, but it seemed to start from nowere, without
a previous description about how a demod driver would look
like.

Add such description, for completeness.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-06-25 12:40:54 -03:00
Mauro Carvalho Chehab f495ab869a media: dtv-core.rst: add an introduction to FE kAPI
Instead of just start describing the kAPI functions, add
an introduction giving a general line about a DVB driver's
structure.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-06-25 12:40:41 -03:00
Mauro Carvalho Chehab 77f1f992f8 media: dtv-core.rst: explain how to get DVBv5 statistics
It is not trivial to implement the logic that collects DVBv5
statistics. As we're seein lately too many implementations
that are not quite right when reviewing patchsets, add a
detailed explanation, adding a few examples about the right
thing to be done.

Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-06-24 13:02:01 -03:00
Hans Verkuil c94cdc1e0c [media] cec: add cec_transmit_attempt_done helper function
A simpler variant of cec_transmit_done to be used where the HW does
just a single attempt at a transmit. So if the status indicates an
error, then the corresponding error count will always be 1 and this
function figures that out based on the status argument.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-06-20 06:52:33 -03:00
Hans Verkuil 23111ec304 [media] cec: add cec_s_phys_addr_from_edid helper function
This function simplifies the integration of CEC in DRM drivers.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-06-20 06:51:21 -03:00
Sakari Ailus d6a60897e3 [media] docs-rst: media: Switch documentation to V4L2 fwnode API
Instead of including the V4L2 OF header in ReST documentation, use the
V4L2 fwnode header instead.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Hans Verkuil <hans.verkuil@cisco.com>
Tested-by: Philipp Zabel <p.zabel@pengutronix.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-06-06 09:59:50 -03:00
Sakari Ailus 30b2db3174 [media] docs-rst: Make the CSI-2 bus initialisation documentation match reality
Update the CSI-2 bus documentation to tell that the LP-11 mode is not
mandatory as there are transmitters that cannot be explicitly set to LP-11
mode. Instead, say that this what the transmitter drivers shall do if
possible.

Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-04-17 16:44:09 -03:00
Hans Verkuil 6eae60c5a0 [media] cec-core.rst: document the new cec_get_drvdata() helper
Document the new cec_get_drvdata() helper function.

Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-04-05 15:21:23 -03:00
Baruch Siach ee8c7cdb87 [media] doc: kapi: fix typo
Signed-off-by: Baruch Siach <baruch@tkos.co.il>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
2017-04-05 15:08:48 -03:00