diff options
Diffstat (limited to 'include/media/v4l2-common.h')
| -rw-r--r-- | include/media/v4l2-common.h | 32 |
1 files changed, 29 insertions, 3 deletions
diff --git a/include/media/v4l2-common.h b/include/media/v4l2-common.h index 739b0f0fc1a0..63ad36f04f72 100644 --- a/include/media/v4l2-common.h +++ b/include/media/v4l2-common.h @@ -536,9 +536,10 @@ int v4l2_fill_pixfmt_mp(struct v4l2_pix_format_mplane *pixfmt, u32 pixelformat, * 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 + * Return: + * * >0: Link frequency + * * %-ENOENT: Link frequency or pixel rate control not found + * * %-EINVAL: Invalid link frequency value */ s64 v4l2_get_link_freq(struct v4l2_ctrl_handler *handler, unsigned int mul, unsigned int div); @@ -547,6 +548,31 @@ void v4l2_simplify_fraction(u32 *numerator, u32 *denominator, unsigned int n_terms, unsigned int threshold); u32 v4l2_fraction_to_interval(u32 numerator, u32 denominator); +/** + * v4l2_link_freq_to_bitmap - Figure out platform-supported link frequencies + * @dev: The struct device + * @fw_link_freqs: Array of link frequencies from firmware + * @num_of_fw_link_freqs: Number of entries in @fw_link_freqs + * @driver_link_freqs: Array of link frequencies supported by the driver + * @num_of_driver_link_freqs: Number of entries in @driver_link_freqs + * @bitmap: Bitmap of driver-supported link frequencies found in @fw_link_freqs + * + * This function checks which driver-supported link frequencies are enabled in + * system firmware and sets the corresponding bits in @bitmap (after first + * zeroing it). + * + * Return: + * * %0: Success + * * %-ENOENT: No match found between driver-supported link frequencies and + * those available in firmware. + * * %-ENODATA: No link frequencies were specified in firmware. + */ +int v4l2_link_freq_to_bitmap(struct device *dev, const u64 *fw_link_freqs, + unsigned int num_of_fw_link_freqs, + const s64 *driver_link_freqs, + unsigned int num_of_driver_link_freqs, + unsigned long *bitmap); + static inline u64 v4l2_buffer_get_timestamp(const struct v4l2_buffer *buf) { /* |