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| author | Nick Dyer <nick@shmanahar.org> | 2016-07-18 18:10:30 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@s-opensource.com> | 2016-08-23 16:28:04 -0300 |
| commit | b2fe22d0cf64708c50c26f11b3da8b79809c699b (patch) | |
| tree | de7ba78bc3260c2af09a9ec6a2065497e8ea3088 /Documentation/media/kapi/v4l2-dev.rst | |
| parent | aaf578e12e06160792ae5dd71dee3b074e0f9475 (diff) | |
[media] v4l2-core: Add support for touch devices
Some touch controllers send out touch data in a similar way to a
greyscale frame grabber.
Add new device type VFL_TYPE_TOUCH:
- This uses a new device prefix v4l-touch for these devices, to stop
generic capture software from treating them as webcams. Otherwise,
touch is treated similarly to video capture.
- Add V4L2_INPUT_TYPE_TOUCH
- Add MEDIA_INTF_T_V4L_TOUCH
- Add V4L2_CAP_TOUCH to indicate device is a touch device
Add formats:
- V4L2_TCH_FMT_DELTA_TD16 for signed 16-bit touch deltas
- V4L2_TCH_FMT_DELTA_TD08 for signed 16-bit touch deltas
- V4L2_TCH_FMT_TU16 for unsigned 16-bit touch data
- V4L2_TCH_FMT_TU08 for unsigned 8-bit touch data
This support will be used by:
- Atmel maXTouch (atmel_mxt_ts)
- Synaptics RMI4.
- sur40
Signed-off-by: Nick Dyer <nick@shmanahar.org>
Tested-by: Chris Healy <cphealy@gmail.com>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Acked-by: Dmitry Torokhov <dmitry.torokhov@gmail.com>
Diffstat (limited to 'Documentation/media/kapi/v4l2-dev.rst')
| -rw-r--r-- | Documentation/media/kapi/v4l2-dev.rst | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/Documentation/media/kapi/v4l2-dev.rst b/Documentation/media/kapi/v4l2-dev.rst index d07258a362d1..5782be725334 100644 --- a/Documentation/media/kapi/v4l2-dev.rst +++ b/Documentation/media/kapi/v4l2-dev.rst @@ -200,6 +200,7 @@ types exist: - ``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 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 |