pvr_stream_process
err = pvr_stream_process(pvr_dev, cmd_defs, stream, stream_size, dest);
err = pvr_stream_process(pvr_dev, cmd_defs, stream, stream_size, job->cmd);
pvr_stream_process(struct pvr_device *pvr_dev, const struct pvr_stream_cmd_defs *cmd_defs,