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Diffstat (limited to 'include/media/v4l2-common.h')
| -rw-r--r-- | include/media/v4l2-common.h | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h index 5c0a7f6b5bb6..f8b1faced79c 100644 --- a/include/media/v4l2-common.h +++ b/include/media/v4l2-common.h @@ -581,6 +581,26 @@ int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, u32 pixelformat, #ifdef CONFIG_MEDIA_CONTROLLER s64 v4l2_get_link_freq(const struct media_pad *pad, unsigned int mul, unsigned int div); + +/** + * v4l2_get_active_data_lanes - Get number of active data lanes from driver + * + * @pad: The transmitter's media pad. + * @max_data_lanes: The maximum number of active data lanes supported by + * the MIPI CSI link in hardware. + * + * This function is intended for obtaining the number of data lanes that are + * actively being used by the driver for a MIPI CSI-2 device on a given media pad. + * This information is derived from a mbus_config fetched from a device driver + * using the get_mbus_config v4l2_subdev pad op. + * + * Return: + * * >0: Number of active data lanes + * * %-EINVAL: Number of active data lanes is invalid, as it exceeds the maximum + * supported data lanes. + */ +int v4l2_get_active_data_lanes(const struct media_pad *pad, + unsigned int max_data_lanes); #endif void v4l2_simplify_fraction(u32 *numerator, u32 *denominator, |