220 	// of syt interval. This comes from the interval of isoc cycle. As 1394  in amdtp_stream_add_pcm_hw_constraints()
507 static void build_it_pkt_header(struct amdtp_stream *s, unsigned int cycle,  in build_it_pkt_header()  argument
528 	trace_amdtp_packet(s, cycle, cip_header, payload_length, data_blocks,  in build_it_pkt_header()
628 static int parse_ir_ctx_header(struct amdtp_stream *s, unsigned int cycle,  in parse_ir_ctx_header()  argument
664 	trace_amdtp_packet(s, cycle, cip_header, *payload_length, *data_blocks,  in parse_ir_ctx_header()
679 static inline u32 increment_cycle_count(u32 cycle, unsigned int addend)  in increment_cycle_count()  argument
681 	cycle += addend;  in increment_cycle_count()
682 	if (cycle >= OHCI_MAX_SECOND * CYCLES_PER_SECOND)  in increment_cycle_count()
683 		cycle -= OHCI_MAX_SECOND * CYCLES_PER_SECOND;  in increment_cycle_count()
684 	return cycle;  in increment_cycle_count()
687 // Align to actual cycle count for the packet which is going to be scheduled.
688 // This module queued the same number of isochronous cycle as the size of queue
689 // to kip isochronous cycle, therefore it's OK to just increment the cycle by
690 // the size of queue for scheduled cycle.
694 	u32 cycle = compute_cycle_count(ctx_header_tstamp);  in compute_it_cycle()  local
695 	return increment_cycle_count(cycle, queue_size);  in compute_it_cycle()
710 		unsigned int cycle;  in generate_device_pkt_descs()  local
715 		cycle = compute_cycle_count(ctx_header[1]);  in generate_device_pkt_descs()
717 		err = parse_ir_ctx_header(s, cycle, ctx_header, &payload_length,  in generate_device_pkt_descs()
722 		desc->cycle = cycle;  in generate_device_pkt_descs()
740 static unsigned int compute_syt(unsigned int syt_offset, unsigned int cycle,  in compute_syt()  argument
746 	syt = ((cycle + syt_offset / TICKS_PER_CYCLE) << 12) |  in compute_syt()
766 		desc->cycle = compute_it_cycle(*ctx_header, s->queue_size);  in generate_pkt_descs()
770 			syt = compute_syt(syt, desc->cycle,  in generate_pkt_descs()
853 		build_it_pkt_header(s, desc->cycle, &template.params,  in out_stream_callback()
997 	u32 cycle;  in amdtp_stream_first_callback()  local
1007 		cycle = compute_cycle_count(ctx_header[1]);  in amdtp_stream_first_callback()
1011 		cycle = compute_it_cycle(*ctx_header, s->queue_size);  in amdtp_stream_first_callback()
1019 	s->start_cycle = cycle;  in amdtp_stream_first_callback()
1029  * @start_cycle: the isochronous cycle to start the context. Start immediately
1203 			// preemption to keep latency against bus cycle.  in amdtp_domain_stream_pcm_pointer()
1225 	// Process isochronous packets for recent isochronous cycle to handle  in amdtp_domain_stream_pcm_ack()
1229 		// preemption to keep latency against bus cycle.  in amdtp_domain_stream_pcm_ack()
1377  * @ir_delay_cycle: the cycle delay to start all IR contexts.
1398 	int cycle;  in amdtp_domain_start()  local
1435 		err = get_current_cycle_time(fw_card, &cycle);  in amdtp_domain_start()
1439 		// No need to care overflow in cycle field because of enough  in amdtp_domain_start()
1441 		cycle += ir_delay_cycle;  in amdtp_domain_start()
1444 		if ((cycle & 0x00001fff) >= CYCLES_PER_SECOND) {  in amdtp_domain_start()
1448 			sec = (cycle & 0xffffe000) >> 13;  in amdtp_domain_start()
1449 			cycle = (++sec << 13) |  in amdtp_domain_start()
1450 				((cycle & 0x00001fff) / CYCLES_PER_SECOND);  in amdtp_domain_start()
1455 		cycle &= 0x00007fff;  in amdtp_domain_start()
1457 		cycle = -1;  in amdtp_domain_start()
1464 			cycle_match = cycle;  in amdtp_domain_start()