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4ade3af89b
Add two helper functions to v4l2-isp to handle statistics: - v4l2_isp_stats_init_buffer() to initialize a statistics buffer - v4l2_isp_stats_init_block() to initialize a statistics block in the next available memory location of a buffer The v4l2_isp_stats_init_buffer() resets the data size counter of the buffer and initializes its 'version' field. The v4l2_isp_stats_init_block() helper accepts the type of the stats block about to be populated, an array of per-block-type information and the maximum size of the v4l2-isp buffer. If enough space for the new block is available, the function increments the v4l2_isp_buffer.data_size counter, initializes the new stats block header and returns a pointer to the block for the driver to populate it. Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Signed-off-by: Jacopo Mondi <jacopo.mondi@ideasonboard.com> Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>