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media: v4l2-dev: convert VFL_TYPE_* into an enum

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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 <[email protected]>
Acked-by: Hans Verkuil <[email protected]>
Signed-off-by: Mauro Carvalho Chehab <[email protected]>
This commit is contained in:
Mauro Carvalho Chehab 2017-09-28 18:39:32 -04:00
commit 4839c58f03
11 changed files with 98 additions and 43 deletions
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17
Documentation/media/kapi/v4l2-dev.rst
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@ -196,11 +196,18 @@ device.
Which device is registered depends on the type argument. The following
types exist:
- ``VFL_TYPE_GRABBER``: ``/dev/videoX`` for video input/output devices
- ``VFL_TYPE_VBI``: ``/dev/vbiX`` for vertical blank data (i.e. closed captions, teletext)
- ``VFL_TYPE_RADIO``: ``/dev/radioX`` for radio tuners
- ``VFL_TYPE_SDR``: ``/dev/swradioX`` for Software Defined Radio tuners
- ``VFL_TYPE_TOUCH``: ``/dev/v4l-touchX`` for touch sensors
========================== ==================== ==============================
:c:type:`vfl_devnode_type` Device name Usage
========================== ==================== ==============================
``VFL_TYPE_GRABBER`` ``/dev/videoX`` for video input/output devices
``VFL_TYPE_VBI`` ``/dev/vbiX`` for vertical blank data (i.e.
closed captions, teletext)
``VFL_TYPE_RADIO`` ``/dev/radioX`` for radio tuners
``VFL_TYPE_SUBDEV`` ``/dev/v4l-subdevX`` for V4L2 subdevices
``VFL_TYPE_SDR`` ``/dev/swradioX`` for Software Defined Radio
(SDR) tuners
``VFL_TYPE_TOUCH`` ``/dev/v4l-touchX`` for touch sensors
========================== ==================== ==============================
The last argument gives you a certain amount of control over the device
device node number used (i.e. the X in ``videoX``). Normally you will pass -1