diff options
| author | Guennadi Liakhovetski <g.liakhovetski@gmx.de> | 2008-12-18 11:34:20 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2008-12-30 09:40:18 -0200 |
| commit | a9bef518cd78d569a3ff0b1ac2afa5e2d8b3573a (patch) | |
| tree | 30c50223f02e8bbc3b070a60aef8432397b90954 /include | |
| parent | 39bf372f606448de2df93a90f40efc613cb5c909 (diff) | |
V4L/DVB (10074): soc-camera: add camera sense data
Add a struct soc_camera_sense, that can be used by camera host drivers to
request additional information from a camera driver, for example, when
changing data format. This struct can be extended in the future, its first use
is to request the camera driver whether the pixel-clock frequency has changed.
Tested-by: Robert Jarzmik <robert.jarzmik@free.fr>
Signed-off-by: Guennadi Liakhovetski <g.liakhovetski@gmx.de>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'include')
| -rw-r--r-- | include/media/soc_camera.h | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/include/media/soc_camera.h b/include/media/soc_camera.h index e6ed0d94ac1..38b826c608b 100644 --- a/include/media/soc_camera.h +++ b/include/media/soc_camera.h @@ -36,6 +36,7 @@ struct soc_camera_device { unsigned char iface; /* Host number */ unsigned char devnum; /* Device number per host */ unsigned char buswidth; /* See comment in .c */ + struct soc_camera_sense *sense; /* See comment in struct definition */ struct soc_camera_ops *ops; struct video_device *vdev; const struct soc_camera_data_format *current_fmt; @@ -172,6 +173,32 @@ struct soc_camera_ops { int num_controls; }; +#define SOCAM_SENSE_PCLK_CHANGED (1 << 0) + +/** + * This struct can be attached to struct soc_camera_device by the host driver + * to request sense from the camera, for example, when calling .set_fmt(). The + * host then can check which flags are set and verify respective values if any. + * For example, if SOCAM_SENSE_PCLK_CHANGED is set, it means, pixclock has + * changed during this operation. After completion the host should detach sense. + * + * @flags ored SOCAM_SENSE_* flags + * @master_clock if the host wants to be informed about pixel-clock + * change, it better set master_clock. + * @pixel_clock_max maximum pixel clock frequency supported by the host, + * camera is not allowed to exceed this. + * @pixel_clock if the camera driver changed pixel clock during this + * operation, it sets SOCAM_SENSE_PCLK_CHANGED, uses + * master_clock to calculate the new pixel-clock and + * sets this field. + */ +struct soc_camera_sense { + unsigned long flags; + unsigned long master_clock; + unsigned long pixel_clock_max; + unsigned long pixel_clock; +}; + static inline struct v4l2_queryctrl const *soc_camera_find_qctrl( struct soc_camera_ops *ops, int id) { |