diff options
Diffstat (limited to 'include/media/v4l2-common.h')
| -rw-r--r-- | include/media/v4l2-common.h | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h index a3083529b698..be36cbdcc1bd 100644 --- a/include/media/v4l2-common.h +++ b/include/media/v4l2-common.h @@ -519,6 +519,27 @@ int v4l2_fill_pixfmt(struct v4l2_pix_format *pixfmt, u32 pixelformat, int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, u32 pixelformat, u32 width, u32 height); +/** + * v4l2_get_link_rate - Get link rate from transmitter + * + * @handler: The transmitter's control handler + * @mul: The multiplier between pixel rate and link frequency. Bits per pixel on + * D-PHY, samples per clock on parallel. 0 otherwise. + * @div: The divisor between pixel rate and link frequency. Number of data lanes + * times two on D-PHY, 1 on parallel. 0 otherwise. + * + * This function is intended for obtaining the link frequency from the + * transmitter sub-devices. It returns the link rate, either from the + * V4L2_CID_LINK_FREQ control implemented by the transmitter, or value + * calculated based on the V4L2_CID_PIXEL_RATE implemented by the transmitter. + * + * Returns link frequency on success, otherwise a negative error code: + * -ENOENT: Link frequency or pixel rate control not found + * -EINVAL: Invalid link frequency value + */ +s64 v4l2_get_link_rate(struct v4l2_ctrl_handler *handler, unsigned int mul, + unsigned int div); + static inline u64 v4l2_buffer_get_timestamp(const struct v4l2_buffer *buf) { /* |