diff options
| author | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2016-02-05 07:02:43 -0200 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@osg.samsung.com> | 2016-02-10 07:23:40 -0200 |
| commit | 54d0dbac1266d2b9a6b5a87316162a068ad545bf (patch) | |
| tree | 4dfe3f8a480f4cdccb2e2c441264be44dea9517f /include/media | |
| parent | 85e91f80cfc6c626f9afe1a4ca66447b8fd74315 (diff) | |
| download | linux-54d0dbac1266d2b9a6b5a87316162a068ad545bf.tar.bz2 | |
[media] v4l2-mc: add a generic function to create the media graph
The em28xx_v4l2_create_media_graph() is almost generic enough to
be at the core, as an ancillary function. Make it even more generic,
by getting rid of em28xx-specific code, relying only at the
media_device, in order to discover all entities found on PC-customer's
hardware and add it at the V4L2 core.
Signed-off-by: Mauro Carvalho Chehab <mchehab@osg.samsung.com>
Diffstat (limited to 'include/media')
| -rw-r--r-- | include/media/v4l2-mc.h | 25 |
1 files changed, 25 insertions, 0 deletions
diff --git a/include/media/v4l2-mc.h b/include/media/v4l2-mc.h index df115195690e..aed9e9b87f82 100644 --- a/include/media/v4l2-mc.h +++ b/include/media/v4l2-mc.h @@ -14,6 +14,8 @@ * GNU General Public License for more details. */ +#include <media/media-device.h> + /** * enum tuner_pad_index - tuner pad index for MEDIA_ENT_F_TUNER * @@ -89,3 +91,26 @@ enum demod_pad_index { DEMOD_PAD_VBI_OUT, DEMOD_NUM_PADS }; + +/** + * v4l2_mc_create_media_graph() - create Media Controller links at the graph. + * + * @mdev: pointer to the &media_device struct. + * + * Add links between the entities commonly found on PC customer's hardware at + * the V4L2 side: camera sensors, audio and video PLL-IF decoders, tuners, + * analog TV decoder and I/O entities (video, VBI and Software Defined Radio). + * NOTE: webcams are modelled on a very simple way: the sensor is + * connected directly to the I/O entity. All dirty details, like + * scaler and crop HW are hidden. While such mapping is enough for v4l2 + * interface centric PC-consumer's hardware, V4L2 subdev centric camera + * hardware should not use this routine, as it will not build the right graph. + */ +#ifdef CONFIG_MEDIA_CONTROLLER +int v4l2_mc_create_media_graph(struct media_device *mdev); +#else +static inline int v4l2_mc_create_media_graph(struct media_device *mdev) +{ + return 0; +} +#endif |