diff --git a/sound/firewire/amdtp.c b/sound/firewire/amdtp.c
index dce4c6dd3f6d..51aad680886d 100644
--- a/sound/firewire/amdtp.c
+++ b/sound/firewire/amdtp.c
@@ -620,6 +620,7 @@ static void handle_in_packet(struct amdtp_stream *s,
 	u32 cip_header[2];
 	unsigned int data_blocks, data_block_quadlets, data_block_counter;
 	struct snd_pcm_substream *pcm = NULL;
+	bool lost;
 
 	cip_header[0] = be32_to_cpu(buffer[0]);
 	cip_header[1] = be32_to_cpu(buffer[1]);
@@ -658,7 +659,13 @@ static void handle_in_packet(struct amdtp_stream *s,
 
 	/* Check data block counter continuity */
 	data_block_counter = cip_header[0] & AMDTP_DBC_MASK;
-	if (data_block_counter != s->data_block_counter) {
+	if (!(s->flags & CIP_DBC_IS_END_EVENT))
+		lost = data_block_counter != s->data_block_counter;
+	else
+		lost = data_block_counter !=
+		       ((s->data_block_counter + data_blocks) & 0xff);
+
+	if (lost) {
 		dev_info(&s->unit->device,
 			 "Detect discontinuity of CIP: %02X %02X\n",
 			 s->data_block_counter, data_block_counter);
@@ -676,7 +683,11 @@ static void handle_in_packet(struct amdtp_stream *s,
 			amdtp_pull_midi(s, buffer, data_blocks);
 	}
 
-	s->data_block_counter = (data_block_counter + data_blocks) & 0xff;
+	if (s->flags & CIP_DBC_IS_END_EVENT)
+		s->data_block_counter = data_block_counter;
+	else
+		s->data_block_counter =
+				(data_block_counter + data_blocks) & 0xff;
 end:
 	if (queue_in_packet(s) < 0)
 		goto err;
diff --git a/sound/firewire/amdtp.h b/sound/firewire/amdtp.h
index 96b96ec812b2..1ca1a193bbc0 100644
--- a/sound/firewire/amdtp.h
+++ b/sound/firewire/amdtp.h
@@ -19,12 +19,15 @@
  * @CIP_SYNC_TO_DEVICE: In sync to device mode, time stamp in out packets is
  *	generated by in packets. Defaultly this driver generates timestamp.
  * @CIP_EMPTY_WITH_TAG0: Only for in-stream. Empty in-packets have TAG0.
+ * @CIP_DBC_IS_END_EVENT: Only for in-stream. The value of dbc in an in-packet
+ *	corresponds to the end of event in the packet. Out of IEC 61883.
  */
 enum cip_flags {
 	CIP_NONBLOCKING		= 0x00,
 	CIP_BLOCKING		= 0x01,
 	CIP_SYNC_TO_DEVICE	= 0x02,
 	CIP_EMPTY_WITH_TAG0	= 0x04,
+	CIP_DBC_IS_END_EVENT	= 0x08,
 };
 
 /**
diff --git a/sound/firewire/fireworks/fireworks_stream.c b/sound/firewire/fireworks/fireworks_stream.c
index 360e871bf838..d687b047446b 100644
--- a/sound/firewire/fireworks/fireworks_stream.c
+++ b/sound/firewire/fireworks/fireworks_stream.c
@@ -196,6 +196,8 @@ int snd_efw_stream_init_duplex(struct snd_efw *efw)
 		goto end;
 	/* Fireworks transmits NODATA packets with TAG0. */
 	efw->tx_stream.flags |= CIP_EMPTY_WITH_TAG0;
+	/* Fireworks has its own meaning for dbc. */
+	efw->tx_stream.flags |= CIP_DBC_IS_END_EVENT;
 
 	err = init_stream(efw, &efw->rx_stream);
 	if (err < 0) {