From 588f2e2caf6795ca29d50a45ea1e1438274e75e0 Mon Sep 17 00:00:00 2001
From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Date: Mon, 22 Jul 2019 12:36:51 +0900
Subject: ALSA: firewire-lib: obsolete ctx_data.tx.first_dbc with
 CIP_UNALIGHED_DBC flag

Recent firmware for Fireworks board module have a quirk to start
transmission of CIP with non-zero value for its data block counter.
In current implementation of ALSA firewire stack, the quirk is handled
by 'struct amdtp_stream.ctx_data.tx.first_dbc' with value 0x02. However,
the value comes from reverse engineering. It's better to handle this
quirk without the explicit value.

In a process to parse CIP header, the quirk of data block counter
affects decision of sequence index in sequence-multiplexed data channel;
i.e. MIDI conformant data channel. In Fireworks, the index is decided
by the number of data blocks from top of the same CIP, thus the value
of data block counter is useless.

This commit adds CIP_UNALIGHED_DBC flag and obsoletes the explicit
value for this quirk.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/firewire/amdtp-am824.c | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

(limited to 'sound/firewire/amdtp-am824.c')

diff --git a/sound/firewire/amdtp-am824.c b/sound/firewire/amdtp-am824.c
index fd5d6b8ac557..99c567ded7a3 100644
--- a/sound/firewire/amdtp-am824.c
+++ b/sound/firewire/amdtp-am824.c
@@ -315,12 +315,16 @@ static void read_midi_messages(struct amdtp_stream *s,
 			       __be32 *buffer, unsigned int frames)
 {
 	struct amdtp_am824 *p = s->protocol;
-	unsigned int f, port;
 	int len;
 	u8 *b;
+	int f;
 
 	for (f = 0; f < frames; f++) {
-		port = (8 - s->ctx_data.tx.first_dbc + s->data_block_counter + f) % 8;
+		unsigned int port = f;
+
+		if (!(s->flags & CIP_UNALIGHED_DBC))
+			port += s->data_block_counter;
+		port %= 8;
 		b = (u8 *)&buffer[p->midi_position];
 
 		len = b[0] - 0x80;
-- 
cgit v1.2.3-59-g8ed1b


From ab75481202d2925a017e4cb5407b0bb49c356de8 Mon Sep 17 00:00:00 2001
From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Date: Mon, 22 Jul 2019 12:36:53 +0900
Subject: ALSA: firewire-lib: pass data block counter to data block processing
 layer

This is a preparation for future commit that 'struct
amdtp_stream.data_block_count' does not represent the value of
data block count for current data block.

However, data block count is required for calculation of sequence index
in sequence-multiplied data channel. Some of data block processing layer
require it; e.g. for AM824 data block.

This commit passes data block count to the processing layer.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/firewire/amdtp-am824.c         | 24 +++++++++++++-----------
 sound/firewire/amdtp-stream.c        |  4 ++--
 sound/firewire/amdtp-stream.h        |  1 +
 sound/firewire/digi00x/amdtp-dot.c   | 16 +++++++---------
 sound/firewire/fireface/amdtp-ff.c   | 10 ++++------
 sound/firewire/motu/amdtp-motu.c     |  8 ++++----
 sound/firewire/tascam/amdtp-tascam.c | 10 ++++------
 7 files changed, 35 insertions(+), 38 deletions(-)

(limited to 'sound/firewire/amdtp-am824.c')

diff --git a/sound/firewire/amdtp-am824.c b/sound/firewire/amdtp-am824.c
index 99c567ded7a3..03a7e0533131 100644
--- a/sound/firewire/amdtp-am824.c
+++ b/sound/firewire/amdtp-am824.c
@@ -284,7 +284,7 @@ static void midi_rate_use_one_byte(struct amdtp_stream *s, unsigned int port)
 }
 
 static void write_midi_messages(struct amdtp_stream *s, __be32 *buffer,
-				unsigned int frames)
+			unsigned int frames, unsigned int data_block_counter)
 {
 	struct amdtp_am824 *p = s->protocol;
 	unsigned int f, port;
@@ -293,7 +293,7 @@ static void write_midi_messages(struct amdtp_stream *s, __be32 *buffer,
 	for (f = 0; f < frames; f++) {
 		b = (u8 *)&buffer[p->midi_position];
 
-		port = (s->data_block_counter + f) % 8;
+		port = (data_block_counter + f) % 8;
 		if (f < MAX_MIDI_RX_BLOCKS &&
 		    midi_ratelimit_per_packet(s, port) &&
 		    p->midi[port] != NULL &&
@@ -311,8 +311,8 @@ static void write_midi_messages(struct amdtp_stream *s, __be32 *buffer,
 	}
 }
 
-static void read_midi_messages(struct amdtp_stream *s,
-			       __be32 *buffer, unsigned int frames)
+static void read_midi_messages(struct amdtp_stream *s, __be32 *buffer,
+			unsigned int frames, unsigned int data_block_counter)
 {
 	struct amdtp_am824 *p = s->protocol;
 	int len;
@@ -323,7 +323,7 @@ static void read_midi_messages(struct amdtp_stream *s,
 		unsigned int port = f;
 
 		if (!(s->flags & CIP_UNALIGHED_DBC))
-			port += s->data_block_counter;
+			port += data_block_counter;
 		port %= 8;
 		b = (u8 *)&buffer[p->midi_position];
 
@@ -335,8 +335,9 @@ static void read_midi_messages(struct amdtp_stream *s,
 	}
 }
 
-static unsigned int process_rx_data_blocks(struct amdtp_stream *s, __be32 *buffer,
-					   unsigned int data_blocks, unsigned int *syt)
+static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
+			__be32 *buffer, unsigned int data_blocks,
+			unsigned int data_block_counter, unsigned int *syt)
 {
 	struct amdtp_am824 *p = s->protocol;
 	struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
@@ -351,13 +352,14 @@ static unsigned int process_rx_data_blocks(struct amdtp_stream *s, __be32 *buffe
 	}
 
 	if (p->midi_ports)
-		write_midi_messages(s, buffer, data_blocks);
+		write_midi_messages(s, buffer, data_blocks, data_block_counter);
 
 	return pcm_frames;
 }
 
-static unsigned int process_tx_data_blocks(struct amdtp_stream *s, __be32 *buffer,
-					   unsigned int data_blocks, unsigned int *syt)
+static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
+			__be32 *buffer, unsigned int data_blocks,
+			unsigned int data_block_counter, unsigned int *syt)
 {
 	struct amdtp_am824 *p = s->protocol;
 	struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
@@ -371,7 +373,7 @@ static unsigned int process_tx_data_blocks(struct amdtp_stream *s, __be32 *buffe
 	}
 
 	if (p->midi_ports)
-		read_midi_messages(s, buffer, data_blocks);
+		read_midi_messages(s, buffer, data_blocks, data_block_counter);
 
 	return pcm_frames;
 }
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index fe1512905a43..40de9fc9d751 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -722,7 +722,7 @@ static void out_stream_callback(struct fw_iso_context *context, u32 tstamp,
 		data_blocks = calculate_data_blocks(s, syt);
 		buffer = s->buffer.packets[s->packet_index].buffer;
 		pcm_frames = s->process_data_blocks(s, buffer, data_blocks,
-						    &syt);
+						s->data_block_counter, &syt);
 
 		build_it_pkt_header(s, cycle, &template.params, data_blocks,
 				    syt, i);
@@ -776,7 +776,7 @@ static void in_stream_callback(struct fw_iso_context *context, u32 tstamp,
 		if (err >= 0) {
 			buffer = s->buffer.packets[s->packet_index].buffer;
 			pcm_frames = s->process_data_blocks(s, buffer,
-							    data_blocks, &syt);
+				data_blocks, s->data_block_counter, &syt);
 
 			if (!(s->flags & CIP_DBC_IS_END_EVENT)) {
 				s->data_block_counter += data_blocks;
diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h
index 5d611122312b..762ac3c7e902 100644
--- a/sound/firewire/amdtp-stream.h
+++ b/sound/firewire/amdtp-stream.h
@@ -99,6 +99,7 @@ typedef unsigned int (*amdtp_stream_process_data_blocks_t)(
 						struct amdtp_stream *s,
 						__be32 *buffer,
 						unsigned int data_blocks,
+						unsigned int data_block_counter,
 						unsigned int *syt);
 struct amdtp_stream {
 	struct fw_unit *unit;
diff --git a/sound/firewire/digi00x/amdtp-dot.c b/sound/firewire/digi00x/amdtp-dot.c
index 45ff73d16074..5c12973c2652 100644
--- a/sound/firewire/digi00x/amdtp-dot.c
+++ b/sound/firewire/digi00x/amdtp-dot.c
@@ -234,7 +234,7 @@ static inline void midi_use_bytes(struct amdtp_stream *s,
 }
 
 static void write_midi_messages(struct amdtp_stream *s, __be32 *buffer,
-				unsigned int data_blocks)
+		unsigned int data_blocks, unsigned int data_block_counter)
 {
 	struct amdtp_dot *p = s->protocol;
 	unsigned int f, port;
@@ -242,7 +242,7 @@ static void write_midi_messages(struct amdtp_stream *s, __be32 *buffer,
 	u8 *b;
 
 	for (f = 0; f < data_blocks; f++) {
-		port = (s->data_block_counter + f) % 8;
+		port = (data_block_counter + f) % 8;
 		b = (u8 *)&buffer[0];
 
 		len = 0;
@@ -330,9 +330,8 @@ void amdtp_dot_midi_trigger(struct amdtp_stream *s, unsigned int port,
 }
 
 static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-					   __be32 *buffer,
-					   unsigned int data_blocks,
-					   unsigned int *syt)
+			__be32 *buffer, unsigned int data_blocks,
+			unsigned int data_block_counter, unsigned int *syt)
 {
 	struct snd_pcm_substream *pcm;
 	unsigned int pcm_frames;
@@ -351,9 +350,8 @@ static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
 }
 
 static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-					   __be32 *buffer,
-					   unsigned int data_blocks,
-					   unsigned int *syt)
+			__be32 *buffer, unsigned int data_blocks,
+			unsigned int data_block_counter, unsigned int *syt)
 {
 	struct snd_pcm_substream *pcm;
 	unsigned int pcm_frames;
@@ -367,7 +365,7 @@ static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
 		pcm_frames = 0;
 	}
 
-	write_midi_messages(s, buffer, data_blocks);
+	write_midi_messages(s, buffer, data_blocks, data_block_counter);
 
 	return pcm_frames;
 }
diff --git a/sound/firewire/fireface/amdtp-ff.c b/sound/firewire/fireface/amdtp-ff.c
index 2938489740b4..71879922ab39 100644
--- a/sound/firewire/fireface/amdtp-ff.c
+++ b/sound/firewire/fireface/amdtp-ff.c
@@ -103,9 +103,8 @@ int amdtp_ff_add_pcm_hw_constraints(struct amdtp_stream *s,
 }
 
 static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-					   __be32 *buffer,
-					   unsigned int data_blocks,
-					   unsigned int *syt)
+			__be32 *buffer, unsigned int data_blocks,
+			unsigned int data_block_counter, unsigned int *syt)
 {
 	struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
 	unsigned int pcm_frames;
@@ -122,9 +121,8 @@ static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
 }
 
 static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-					   __be32 *buffer,
-					   unsigned int data_blocks,
-					   unsigned int *syt)
+			__be32 *buffer, unsigned int data_blocks,
+			unsigned int data_block_counter, unsigned int *syt)
 {
 	struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
 	unsigned int pcm_frames;
diff --git a/sound/firewire/motu/amdtp-motu.c b/sound/firewire/motu/amdtp-motu.c
index 7973dedd31ef..9693f37a0032 100644
--- a/sound/firewire/motu/amdtp-motu.c
+++ b/sound/firewire/motu/amdtp-motu.c
@@ -299,8 +299,8 @@ static void __maybe_unused copy_message(u64 *frames, __be32 *buffer,
 }
 
 static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-				__be32 *buffer, unsigned int data_blocks,
-				unsigned int *syt)
+			__be32 *buffer, unsigned int data_blocks,
+			unsigned int data_block_counter, unsigned int *syt)
 {
 	struct amdtp_motu *p = s->protocol;
 	struct snd_pcm_substream *pcm;
@@ -361,8 +361,8 @@ static void write_sph(struct amdtp_stream *s, __be32 *buffer,
 }
 
 static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-				__be32 *buffer, unsigned int data_blocks,
-				unsigned int *syt)
+			__be32 *buffer, unsigned int data_blocks,
+			unsigned int data_block_counter, unsigned int *syt)
 {
 	struct amdtp_motu *p = (struct amdtp_motu *)s->protocol;
 	struct snd_pcm_substream *pcm;
diff --git a/sound/firewire/tascam/amdtp-tascam.c b/sound/firewire/tascam/amdtp-tascam.c
index 95fb10b7a737..3a4d1f855f79 100644
--- a/sound/firewire/tascam/amdtp-tascam.c
+++ b/sound/firewire/tascam/amdtp-tascam.c
@@ -166,9 +166,8 @@ static void read_status_messages(struct amdtp_stream *s,
 }
 
 static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-					   __be32 *buffer,
-					   unsigned int data_blocks,
-					   unsigned int *syt)
+			__be32 *buffer, unsigned int data_blocks,
+			unsigned int data_block_counter, unsigned int *syt)
 {
 	struct snd_pcm_substream *pcm;
 
@@ -182,9 +181,8 @@ static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
 }
 
 static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-					   __be32 *buffer,
-					   unsigned int data_blocks,
-					   unsigned int *syt)
+			__be32 *buffer, unsigned int data_blocks,
+			unsigned int data_block_counter, unsigned int *syt)
 {
 	struct snd_pcm_substream *pcm;
 
-- 
cgit v1.2.3-59-g8ed1b


From 600c8018df605a91575aef6811cf927e2d933d30 Mon Sep 17 00:00:00 2001
From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Date: Mon, 22 Jul 2019 12:36:57 +0900
Subject: ALSA: firewire-lib: pass no syt information to data block processing
 layer

In a previous commit, the variable passed from packet streaming layer
for syt variable is useless. This commit obsoletes it.

In my future work, the syt information is passed to data block processing
layer by another way.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/firewire/amdtp-am824.c         |  8 ++++----
 sound/firewire/amdtp-stream.c        |  5 ++---
 sound/firewire/amdtp-stream.h        |  3 +--
 sound/firewire/digi00x/amdtp-dot.c   |  8 ++++----
 sound/firewire/fireface/amdtp-ff.c   |  8 ++++----
 sound/firewire/motu/amdtp-motu.c     | 11 ++++-------
 sound/firewire/tascam/amdtp-tascam.c | 11 ++++-------
 7 files changed, 23 insertions(+), 31 deletions(-)

(limited to 'sound/firewire/amdtp-am824.c')

diff --git a/sound/firewire/amdtp-am824.c b/sound/firewire/amdtp-am824.c
index 03a7e0533131..21068b23d528 100644
--- a/sound/firewire/amdtp-am824.c
+++ b/sound/firewire/amdtp-am824.c
@@ -336,8 +336,8 @@ static void read_midi_messages(struct amdtp_stream *s, __be32 *buffer,
 }
 
 static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-			__be32 *buffer, unsigned int data_blocks,
-			unsigned int data_block_counter, unsigned int *syt)
+				__be32 *buffer, unsigned int data_blocks,
+				unsigned int data_block_counter)
 {
 	struct amdtp_am824 *p = s->protocol;
 	struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
@@ -358,8 +358,8 @@ static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
 }
 
 static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-			__be32 *buffer, unsigned int data_blocks,
-			unsigned int data_block_counter, unsigned int *syt)
+				__be32 *buffer, unsigned int data_blocks,
+				unsigned int data_block_counter)
 {
 	struct amdtp_am824 *p = s->protocol;
 	struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index 6242240cd8ee..c8543cdb3c8c 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -714,8 +714,7 @@ static void out_stream_callback(struct fw_iso_context *context, u32 tstamp,
 		data_blocks = calculate_data_blocks(s, syt);
 		buffer = s->buffer.packets[s->packet_index].buffer;
 		dbc = s->data_block_counter;
-		pcm_frames = s->process_data_blocks(s, buffer, data_blocks, dbc,
-						    &syt);
+		pcm_frames = s->process_data_blocks(s, buffer, data_blocks, dbc);
 
 		if (s->flags & CIP_DBC_IS_END_EVENT)
 			dbc = (dbc + data_blocks) & 0xff;
@@ -782,7 +781,7 @@ static void in_stream_callback(struct fw_iso_context *context, u32 tstamp,
 		if (err >= 0) {
 			buffer = s->buffer.packets[s->packet_index].buffer;
 			pcm_frames = s->process_data_blocks(s, buffer,
-				data_blocks, dbc, &syt);
+							    data_blocks, dbc);
 
 			if (!(s->flags & CIP_DBC_IS_END_EVENT))
 				dbc = (dbc + data_blocks) & 0xff;
diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h
index 5b9d4212e202..5996cc60f166 100644
--- a/sound/firewire/amdtp-stream.h
+++ b/sound/firewire/amdtp-stream.h
@@ -99,8 +99,7 @@ typedef unsigned int (*amdtp_stream_process_data_blocks_t)(
 						struct amdtp_stream *s,
 						__be32 *buffer,
 						unsigned int data_blocks,
-						unsigned int data_block_counter,
-						unsigned int *syt);
+						unsigned int data_block_counter);
 struct amdtp_stream {
 	struct fw_unit *unit;
 	enum cip_flags flags;
diff --git a/sound/firewire/digi00x/amdtp-dot.c b/sound/firewire/digi00x/amdtp-dot.c
index 5c12973c2652..c296d1017ed3 100644
--- a/sound/firewire/digi00x/amdtp-dot.c
+++ b/sound/firewire/digi00x/amdtp-dot.c
@@ -330,8 +330,8 @@ void amdtp_dot_midi_trigger(struct amdtp_stream *s, unsigned int port,
 }
 
 static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-			__be32 *buffer, unsigned int data_blocks,
-			unsigned int data_block_counter, unsigned int *syt)
+				__be32 *buffer, unsigned int data_blocks,
+				unsigned int data_block_counter)
 {
 	struct snd_pcm_substream *pcm;
 	unsigned int pcm_frames;
@@ -350,8 +350,8 @@ static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
 }
 
 static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-			__be32 *buffer, unsigned int data_blocks,
-			unsigned int data_block_counter, unsigned int *syt)
+				__be32 *buffer, unsigned int data_blocks,
+				unsigned int data_block_counter)
 {
 	struct snd_pcm_substream *pcm;
 	unsigned int pcm_frames;
diff --git a/sound/firewire/fireface/amdtp-ff.c b/sound/firewire/fireface/amdtp-ff.c
index 71879922ab39..31a60dff94ac 100644
--- a/sound/firewire/fireface/amdtp-ff.c
+++ b/sound/firewire/fireface/amdtp-ff.c
@@ -103,8 +103,8 @@ int amdtp_ff_add_pcm_hw_constraints(struct amdtp_stream *s,
 }
 
 static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-			__be32 *buffer, unsigned int data_blocks,
-			unsigned int data_block_counter, unsigned int *syt)
+				__be32 *buffer, unsigned int data_blocks,
+				unsigned int data_block_counter)
 {
 	struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
 	unsigned int pcm_frames;
@@ -121,8 +121,8 @@ static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
 }
 
 static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-			__be32 *buffer, unsigned int data_blocks,
-			unsigned int data_block_counter, unsigned int *syt)
+				__be32 *buffer, unsigned int data_blocks,
+				unsigned int data_block_counter)
 {
 	struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
 	unsigned int pcm_frames;
diff --git a/sound/firewire/motu/amdtp-motu.c b/sound/firewire/motu/amdtp-motu.c
index 683873699885..30d5f87119cc 100644
--- a/sound/firewire/motu/amdtp-motu.c
+++ b/sound/firewire/motu/amdtp-motu.c
@@ -299,8 +299,8 @@ static void __maybe_unused copy_message(u64 *frames, __be32 *buffer,
 }
 
 static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-			__be32 *buffer, unsigned int data_blocks,
-			unsigned int data_block_counter, unsigned int *syt)
+				__be32 *buffer, unsigned int data_blocks,
+				unsigned int data_block_counter)
 {
 	struct amdtp_motu *p = s->protocol;
 	struct snd_pcm_substream *pcm;
@@ -361,15 +361,12 @@ static void write_sph(struct amdtp_stream *s, __be32 *buffer,
 }
 
 static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-			__be32 *buffer, unsigned int data_blocks,
-			unsigned int data_block_counter, unsigned int *syt)
+				__be32 *buffer, unsigned int data_blocks,
+				unsigned int data_block_counter)
 {
 	struct amdtp_motu *p = (struct amdtp_motu *)s->protocol;
 	struct snd_pcm_substream *pcm;
 
-	/* Not used. */
-	*syt = 0xffff;
-
 	/* TODO: how to interact control messages between userspace? */
 
 	if (p->midi_ports)
diff --git a/sound/firewire/tascam/amdtp-tascam.c b/sound/firewire/tascam/amdtp-tascam.c
index 8fba6fb8ba8a..bc1f2d2120b4 100644
--- a/sound/firewire/tascam/amdtp-tascam.c
+++ b/sound/firewire/tascam/amdtp-tascam.c
@@ -166,8 +166,8 @@ static void read_status_messages(struct amdtp_stream *s,
 }
 
 static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-			__be32 *buffer, unsigned int data_blocks,
-			unsigned int data_block_counter, unsigned int *syt)
+				__be32 *buffer, unsigned int data_blocks,
+				unsigned int data_block_counter)
 {
 	struct snd_pcm_substream *pcm;
 
@@ -181,14 +181,11 @@ static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
 }
 
 static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-			__be32 *buffer, unsigned int data_blocks,
-			unsigned int data_block_counter, unsigned int *syt)
+				__be32 *buffer, unsigned int data_blocks,
+				unsigned int data_block_counter)
 {
 	struct snd_pcm_substream *pcm;
 
-	/* This field is not used. */
-	*syt = 0x0000;
-
 	pcm = READ_ONCE(s->pcm);
 	if (pcm)
 		write_pcm_s32(s, pcm, buffer, data_blocks);
-- 
cgit v1.2.3-59-g8ed1b


From d2c104a3426be9991b35c65f0f260a107c4b2942 Mon Sep 17 00:00:00 2001
From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Date: Mon, 22 Jul 2019 12:37:03 +0900
Subject: ALSA: firewire-lib: pass packet descriptor to data block processing
 layer

This commit changes signature of callback function to call data block
processing layer with packet descriptor. At present, the layer is called
per packet.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/firewire/amdtp-am824.c         | 32 ++++++++++++----------
 sound/firewire/amdtp-stream.c        |  6 ++--
 sound/firewire/amdtp-stream.h        |  5 ++--
 sound/firewire/digi00x/amdtp-dot.c   | 27 ++++++++----------
 sound/firewire/fireface/amdtp-ff.c   | 23 ++++++++--------
 sound/firewire/motu/amdtp-motu.c     | 53 ++++++++++++++++++++----------------
 sound/firewire/tascam/amdtp-tascam.c | 39 ++++++++++++++------------
 7 files changed, 97 insertions(+), 88 deletions(-)

(limited to 'sound/firewire/amdtp-am824.c')

diff --git a/sound/firewire/amdtp-am824.c b/sound/firewire/amdtp-am824.c
index 21068b23d528..ff089ffa3374 100644
--- a/sound/firewire/amdtp-am824.c
+++ b/sound/firewire/amdtp-am824.c
@@ -336,44 +336,46 @@ static void read_midi_messages(struct amdtp_stream *s, __be32 *buffer,
 }
 
 static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-				__be32 *buffer, unsigned int data_blocks,
-				unsigned int data_block_counter)
+					   const struct pkt_desc *desc,
+					   struct snd_pcm_substream *pcm)
 {
 	struct amdtp_am824 *p = s->protocol;
-	struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
 	unsigned int pcm_frames;
 
 	if (pcm) {
-		write_pcm_s32(s, pcm, buffer, data_blocks);
-		pcm_frames = data_blocks * p->frame_multiplier;
+		write_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks);
+		pcm_frames = desc->data_blocks * p->frame_multiplier;
 	} else {
-		write_pcm_silence(s, buffer, data_blocks);
+		write_pcm_silence(s, desc->ctx_payload, desc->data_blocks);
 		pcm_frames = 0;
 	}
 
-	if (p->midi_ports)
-		write_midi_messages(s, buffer, data_blocks, data_block_counter);
+	if (p->midi_ports) {
+		write_midi_messages(s, desc->ctx_payload, desc->data_blocks,
+				    desc->data_block_counter);
+	}
 
 	return pcm_frames;
 }
 
 static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-				__be32 *buffer, unsigned int data_blocks,
-				unsigned int data_block_counter)
+					   const struct pkt_desc *desc,
+					   struct snd_pcm_substream *pcm)
 {
 	struct amdtp_am824 *p = s->protocol;
-	struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
 	unsigned int pcm_frames;
 
 	if (pcm) {
-		read_pcm_s32(s, pcm, buffer, data_blocks);
-		pcm_frames = data_blocks * p->frame_multiplier;
+		read_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks);
+		pcm_frames = desc->data_blocks * p->frame_multiplier;
 	} else {
 		pcm_frames = 0;
 	}
 
-	if (p->midi_ports)
-		read_midi_messages(s, buffer, data_blocks, data_block_counter);
+	if (p->midi_ports) {
+		read_midi_messages(s, desc->ctx_payload, desc->data_blocks,
+				   desc->data_block_counter);
+	}
 
 	return pcm_frames;
 }
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index 573265113a6f..db2feb68105c 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -768,13 +768,11 @@ static void process_ctx_payloads(struct amdtp_stream *s,
 
 	for (i = 0; i < packets; ++i) {
 		const struct pkt_desc *desc = descs + i;
-		struct snd_pcm_substream *pcm;
+		struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
 		unsigned int pcm_frames;
 
-		pcm_frames = s->process_data_blocks(s, desc->ctx_payload,
-				desc->data_blocks, desc->data_block_counter);
+		pcm_frames = s->process_data_blocks(s, desc, pcm);
 
-		pcm = READ_ONCE(s->pcm);
 		if (pcm && pcm_frames > 0)
 			update_pcm_pointers(s, pcm, pcm_frames);
 	}
diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h
index 73c492c9a5d5..0e5b85100a04 100644
--- a/sound/firewire/amdtp-stream.h
+++ b/sound/firewire/amdtp-stream.h
@@ -105,9 +105,8 @@ struct pkt_desc {
 struct amdtp_stream;
 typedef unsigned int (*amdtp_stream_process_data_blocks_t)(
 						struct amdtp_stream *s,
-						__be32 *buffer,
-						unsigned int data_blocks,
-						unsigned int data_block_counter);
+						const struct pkt_desc *desc,
+						struct snd_pcm_substream *pcm);
 struct amdtp_stream {
 	struct fw_unit *unit;
 	enum cip_flags flags;
diff --git a/sound/firewire/digi00x/amdtp-dot.c b/sound/firewire/digi00x/amdtp-dot.c
index c296d1017ed3..83ac4b37f26d 100644
--- a/sound/firewire/digi00x/amdtp-dot.c
+++ b/sound/firewire/digi00x/amdtp-dot.c
@@ -330,42 +330,39 @@ void amdtp_dot_midi_trigger(struct amdtp_stream *s, unsigned int port,
 }
 
 static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-				__be32 *buffer, unsigned int data_blocks,
-				unsigned int data_block_counter)
+					   const struct pkt_desc *desc,
+					   struct snd_pcm_substream *pcm)
 {
-	struct snd_pcm_substream *pcm;
 	unsigned int pcm_frames;
 
-	pcm = READ_ONCE(s->pcm);
 	if (pcm) {
-		read_pcm_s32(s, pcm, buffer, data_blocks);
-		pcm_frames = data_blocks;
+		read_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks);
+		pcm_frames = desc->data_blocks;
 	} else {
 		pcm_frames = 0;
 	}
 
-	read_midi_messages(s, buffer, data_blocks);
+	read_midi_messages(s, desc->ctx_payload, desc->data_blocks);
 
 	return pcm_frames;
 }
 
 static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-				__be32 *buffer, unsigned int data_blocks,
-				unsigned int data_block_counter)
+					   const struct pkt_desc *desc,
+					   struct snd_pcm_substream *pcm)
 {
-	struct snd_pcm_substream *pcm;
 	unsigned int pcm_frames;
 
-	pcm = READ_ONCE(s->pcm);
 	if (pcm) {
-		write_pcm_s32(s, pcm, buffer, data_blocks);
-		pcm_frames = data_blocks;
+		write_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks);
+		pcm_frames = desc->data_blocks;
 	} else {
-		write_pcm_silence(s, buffer, data_blocks);
+		write_pcm_silence(s, desc->ctx_payload, desc->data_blocks);
 		pcm_frames = 0;
 	}
 
-	write_midi_messages(s, buffer, data_blocks, data_block_counter);
+	write_midi_messages(s, desc->ctx_payload, desc->data_blocks,
+			    desc->data_block_counter);
 
 	return pcm_frames;
 }
diff --git a/sound/firewire/fireface/amdtp-ff.c b/sound/firewire/fireface/amdtp-ff.c
index 31a60dff94ac..c36232fc4d3e 100644
--- a/sound/firewire/fireface/amdtp-ff.c
+++ b/sound/firewire/fireface/amdtp-ff.c
@@ -103,17 +103,18 @@ int amdtp_ff_add_pcm_hw_constraints(struct amdtp_stream *s,
 }
 
 static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-				__be32 *buffer, unsigned int data_blocks,
-				unsigned int data_block_counter)
+					   const struct pkt_desc *desc,
+					   struct snd_pcm_substream *pcm)
 {
-	struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
 	unsigned int pcm_frames;
 
 	if (pcm) {
-		write_pcm_s32(s, pcm, (__le32 *)buffer, data_blocks);
-		pcm_frames = data_blocks;
+		write_pcm_s32(s, pcm, (__le32 *)desc->ctx_payload,
+			      desc->data_blocks);
+		pcm_frames = desc->data_blocks;
 	} else {
-		write_pcm_silence(s, (__le32 *)buffer, data_blocks);
+		write_pcm_silence(s, (__le32 *)desc->ctx_payload,
+				  desc->data_blocks);
 		pcm_frames = 0;
 	}
 
@@ -121,15 +122,15 @@ static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
 }
 
 static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-				__be32 *buffer, unsigned int data_blocks,
-				unsigned int data_block_counter)
+					   const struct pkt_desc *desc,
+					   struct snd_pcm_substream *pcm)
 {
-	struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
 	unsigned int pcm_frames;
 
 	if (pcm) {
-		read_pcm_s32(s, pcm, (__le32 *)buffer, data_blocks);
-		pcm_frames = data_blocks;
+		read_pcm_s32(s, pcm, (__le32 *)desc->ctx_payload,
+			     desc->data_blocks);
+		pcm_frames = desc->data_blocks;
 	} else {
 		pcm_frames = 0;
 	}
diff --git a/sound/firewire/motu/amdtp-motu.c b/sound/firewire/motu/amdtp-motu.c
index 30d5f87119cc..36ee2c1dd667 100644
--- a/sound/firewire/motu/amdtp-motu.c
+++ b/sound/firewire/motu/amdtp-motu.c
@@ -299,23 +299,27 @@ static void __maybe_unused copy_message(u64 *frames, __be32 *buffer,
 }
 
 static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-				__be32 *buffer, unsigned int data_blocks,
-				unsigned int data_block_counter)
+					   const struct pkt_desc *desc,
+					   struct snd_pcm_substream *pcm)
 {
 	struct amdtp_motu *p = s->protocol;
-	struct snd_pcm_substream *pcm;
+	unsigned int pcm_frames;
 
-	trace_data_block_sph(s, data_blocks, buffer);
-	trace_data_block_message(s, data_blocks, buffer);
+	trace_data_block_sph(s, desc->data_blocks, desc->ctx_payload);
+	trace_data_block_message(s, desc->data_blocks, desc->ctx_payload);
 
 	if (p->midi_ports)
-		read_midi_messages(s, buffer, data_blocks);
+		read_midi_messages(s, desc->ctx_payload, desc->data_blocks);
 
-	pcm = READ_ONCE(s->pcm);
-	if (data_blocks > 0 && pcm)
-		read_pcm_s32(s, pcm->runtime, buffer, data_blocks);
+	if (pcm) {
+		read_pcm_s32(s, pcm->runtime, desc->ctx_payload,
+			     desc->data_blocks);
+		pcm_frames = desc->data_blocks;
+	} else {
+		pcm_frames = 0;
+	}
 
-	return data_blocks;
+	return pcm_frames;
 }
 
 static inline void compute_next_elapse_from_start(struct amdtp_motu *p)
@@ -361,29 +365,32 @@ static void write_sph(struct amdtp_stream *s, __be32 *buffer,
 }
 
 static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-				__be32 *buffer, unsigned int data_blocks,
-				unsigned int data_block_counter)
+					   const struct pkt_desc *desc,
+					   struct snd_pcm_substream *pcm)
 {
 	struct amdtp_motu *p = (struct amdtp_motu *)s->protocol;
-	struct snd_pcm_substream *pcm;
+	unsigned int pcm_frames;
 
 	/* TODO: how to interact control messages between userspace? */
 
 	if (p->midi_ports)
-		write_midi_messages(s, buffer, data_blocks);
+		write_midi_messages(s, desc->ctx_payload, desc->data_blocks);
 
-	pcm = READ_ONCE(s->pcm);
-	if (pcm)
-		write_pcm_s32(s, pcm->runtime, buffer, data_blocks);
-	else
-		write_pcm_silence(s, buffer, data_blocks);
+	if (pcm) {
+		write_pcm_s32(s, pcm->runtime, desc->ctx_payload,
+			      desc->data_blocks);
+		pcm_frames = desc->data_blocks;
+	} else {
+		write_pcm_silence(s, desc->ctx_payload, desc->data_blocks);
+		pcm_frames = 0;
+	}
 
-	write_sph(s, buffer, data_blocks);
+	write_sph(s, desc->ctx_payload, desc->data_blocks);
 
-	trace_data_block_sph(s, data_blocks, buffer);
-	trace_data_block_message(s, data_blocks, buffer);
+	trace_data_block_sph(s, desc->data_blocks, desc->ctx_payload);
+	trace_data_block_message(s, desc->data_blocks, desc->ctx_payload);
 
-	return data_blocks;
+	return pcm_frames;
 }
 
 int amdtp_motu_init(struct amdtp_stream *s, struct fw_unit *unit,
diff --git a/sound/firewire/tascam/amdtp-tascam.c b/sound/firewire/tascam/amdtp-tascam.c
index bc1f2d2120b4..970b1c4a8ea6 100644
--- a/sound/firewire/tascam/amdtp-tascam.c
+++ b/sound/firewire/tascam/amdtp-tascam.c
@@ -166,33 +166,38 @@ static void read_status_messages(struct amdtp_stream *s,
 }
 
 static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-				__be32 *buffer, unsigned int data_blocks,
-				unsigned int data_block_counter)
+					   const struct pkt_desc *desc,
+					   struct snd_pcm_substream *pcm)
 {
-	struct snd_pcm_substream *pcm;
+	unsigned int pcm_frames;
 
-	pcm = READ_ONCE(s->pcm);
-	if (data_blocks > 0 && pcm)
-		read_pcm_s32(s, pcm, buffer, data_blocks);
+	if (pcm) {
+		read_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks);
+		pcm_frames = desc->data_blocks;
+	} else {
+		pcm_frames = 0;
+	}
 
-	read_status_messages(s, buffer, data_blocks);
+	read_status_messages(s, desc->ctx_payload, desc->data_blocks);
 
-	return data_blocks;
+	return pcm_frames;
 }
 
 static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-				__be32 *buffer, unsigned int data_blocks,
-				unsigned int data_block_counter)
+					   const struct pkt_desc *desc,
+					   struct snd_pcm_substream *pcm)
 {
-	struct snd_pcm_substream *pcm;
+	unsigned int pcm_frames;
 
-	pcm = READ_ONCE(s->pcm);
-	if (pcm)
-		write_pcm_s32(s, pcm, buffer, data_blocks);
-	else
-		write_pcm_silence(s, buffer, data_blocks);
+	if (pcm) {
+		write_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks);
+		pcm_frames = desc->data_blocks;
+	} else {
+		write_pcm_silence(s, desc->ctx_payload, desc->data_blocks);
+		pcm_frames = 0;
+	}
 
-	return data_blocks;
+	return pcm_frames;
 }
 
 int amdtp_tscm_init(struct amdtp_stream *s, struct fw_unit *unit,
-- 
cgit v1.2.3-59-g8ed1b


From 9fc90644cae9c0abfcce0576ed0a14cca67f69b9 Mon Sep 17 00:00:00 2001
From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Date: Mon, 22 Jul 2019 12:37:04 +0900
Subject: ALSA: firewire-lib: code refactoring for AM824 data block processing
 layer

This is code refactoring for AM824 data block processing layer so that
it can receive list of packet descriptor.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/firewire/amdtp-am824.c | 51 ++++++++++++++++++++++++++------------------
 1 file changed, 30 insertions(+), 21 deletions(-)

(limited to 'sound/firewire/amdtp-am824.c')

diff --git a/sound/firewire/amdtp-am824.c b/sound/firewire/amdtp-am824.c
index ff089ffa3374..5d2952a1a9b2 100644
--- a/sound/firewire/amdtp-am824.c
+++ b/sound/firewire/amdtp-am824.c
@@ -146,19 +146,24 @@ void amdtp_am824_set_midi_position(struct amdtp_stream *s,
 }
 EXPORT_SYMBOL_GPL(amdtp_am824_set_midi_position);
 
-static void write_pcm_s32(struct amdtp_stream *s,
-			  struct snd_pcm_substream *pcm,
-			  __be32 *buffer, unsigned int frames)
+static void write_pcm_s32(struct amdtp_stream *s, struct snd_pcm_substream *pcm,
+			  __be32 *buffer, unsigned int frames,
+			  unsigned int pcm_frames)
 {
 	struct amdtp_am824 *p = s->protocol;
+	unsigned int channels = p->pcm_channels;
 	struct snd_pcm_runtime *runtime = pcm->runtime;
-	unsigned int channels, remaining_frames, i, c;
+	unsigned int pcm_buffer_pointer;
+	int remaining_frames;
 	const u32 *src;
+	int i, c;
+
+	pcm_buffer_pointer = s->pcm_buffer_pointer + pcm_frames;
+	pcm_buffer_pointer %= runtime->buffer_size;
 
-	channels = p->pcm_channels;
 	src = (void *)runtime->dma_area +
-			frames_to_bytes(runtime, s->pcm_buffer_pointer);
-	remaining_frames = runtime->buffer_size - s->pcm_buffer_pointer;
+				frames_to_bytes(runtime, pcm_buffer_pointer);
+	remaining_frames = runtime->buffer_size - pcm_buffer_pointer;
 
 	for (i = 0; i < frames; ++i) {
 		for (c = 0; c < channels; ++c) {
@@ -172,19 +177,24 @@ static void write_pcm_s32(struct amdtp_stream *s,
 	}
 }
 
-static void read_pcm_s32(struct amdtp_stream *s,
-			 struct snd_pcm_substream *pcm,
-			 __be32 *buffer, unsigned int frames)
+static void read_pcm_s32(struct amdtp_stream *s, struct snd_pcm_substream *pcm,
+			 __be32 *buffer, unsigned int frames,
+			 unsigned int pcm_frames)
 {
 	struct amdtp_am824 *p = s->protocol;
+	unsigned int channels = p->pcm_channels;
 	struct snd_pcm_runtime *runtime = pcm->runtime;
-	unsigned int channels, remaining_frames, i, c;
+	unsigned int pcm_buffer_pointer;
+	int remaining_frames;
 	u32 *dst;
+	int i, c;
+
+	pcm_buffer_pointer = s->pcm_buffer_pointer + pcm_frames;
+	pcm_buffer_pointer %= runtime->buffer_size;
 
-	channels = p->pcm_channels;
 	dst  = (void *)runtime->dma_area +
-			frames_to_bytes(runtime, s->pcm_buffer_pointer);
-	remaining_frames = runtime->buffer_size - s->pcm_buffer_pointer;
+				frames_to_bytes(runtime, pcm_buffer_pointer);
+	remaining_frames = runtime->buffer_size - pcm_buffer_pointer;
 
 	for (i = 0; i < frames; ++i) {
 		for (c = 0; c < channels; ++c) {
@@ -340,14 +350,14 @@ static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
 					   struct snd_pcm_substream *pcm)
 {
 	struct amdtp_am824 *p = s->protocol;
-	unsigned int pcm_frames;
+	unsigned int pcm_frames = 0;
 
 	if (pcm) {
-		write_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks);
+		write_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks,
+			      pcm_frames);
 		pcm_frames = desc->data_blocks * p->frame_multiplier;
 	} else {
 		write_pcm_silence(s, desc->ctx_payload, desc->data_blocks);
-		pcm_frames = 0;
 	}
 
 	if (p->midi_ports) {
@@ -363,13 +373,12 @@ static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
 					   struct snd_pcm_substream *pcm)
 {
 	struct amdtp_am824 *p = s->protocol;
-	unsigned int pcm_frames;
+	unsigned int pcm_frames = 0;
 
 	if (pcm) {
-		read_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks);
+		read_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks,
+			     pcm_frames);
 		pcm_frames = desc->data_blocks * p->frame_multiplier;
-	} else {
-		pcm_frames = 0;
 	}
 
 	if (p->midi_ports) {
-- 
cgit v1.2.3-59-g8ed1b


From 9a738ad1b1a64ef6d8271d8d42d715b75db6eb0d Mon Sep 17 00:00:00 2001
From: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Date: Mon, 22 Jul 2019 12:37:09 +0900
Subject: ALSA: firewire-lib: process payload of isoc context according to
 packet descriptors

This commit changes each of data block processing layer so that it
receives list of packet descriptor.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
---
 sound/firewire/amdtp-am824.c         | 71 +++++++++++++++++++--------------
 sound/firewire/amdtp-stream.c        | 25 +++++-------
 sound/firewire/amdtp-stream.h        |  7 ++--
 sound/firewire/digi00x/amdtp-dot.c   | 66 +++++++++++++++++++------------
 sound/firewire/fireface/amdtp-ff.c   | 55 ++++++++++++++++----------
 sound/firewire/motu/amdtp-motu.c     | 76 +++++++++++++++++++++---------------
 sound/firewire/tascam/amdtp-tascam.c | 60 +++++++++++++++++-----------
 7 files changed, 212 insertions(+), 148 deletions(-)

(limited to 'sound/firewire/amdtp-am824.c')

diff --git a/sound/firewire/amdtp-am824.c b/sound/firewire/amdtp-am824.c
index 5d2952a1a9b2..67d735e9a6a4 100644
--- a/sound/firewire/amdtp-am824.c
+++ b/sound/firewire/amdtp-am824.c
@@ -345,45 +345,59 @@ static void read_midi_messages(struct amdtp_stream *s, __be32 *buffer,
 	}
 }
 
-static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-					   const struct pkt_desc *desc,
-					   struct snd_pcm_substream *pcm)
+static unsigned int process_it_ctx_payloads(struct amdtp_stream *s,
+					    const struct pkt_desc *descs,
+					    unsigned int packets,
+					    struct snd_pcm_substream *pcm)
 {
 	struct amdtp_am824 *p = s->protocol;
 	unsigned int pcm_frames = 0;
+	int i;
 
-	if (pcm) {
-		write_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks,
-			      pcm_frames);
-		pcm_frames = desc->data_blocks * p->frame_multiplier;
-	} else {
-		write_pcm_silence(s, desc->ctx_payload, desc->data_blocks);
-	}
+	for (i = 0; i < packets; ++i) {
+		const struct pkt_desc *desc = descs + i;
+		__be32 *buf = desc->ctx_payload;
+		unsigned int data_blocks = desc->data_blocks;
 
-	if (p->midi_ports) {
-		write_midi_messages(s, desc->ctx_payload, desc->data_blocks,
-				    desc->data_block_counter);
+		if (pcm) {
+			write_pcm_s32(s, pcm, buf, data_blocks, pcm_frames);
+			pcm_frames += data_blocks * p->frame_multiplier;
+		} else {
+			write_pcm_silence(s, buf, data_blocks);
+		}
+
+		if (p->midi_ports) {
+			write_midi_messages(s, buf, data_blocks,
+					    desc->data_block_counter);
+		}
 	}
 
 	return pcm_frames;
 }
 
-static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-					   const struct pkt_desc *desc,
-					   struct snd_pcm_substream *pcm)
+static unsigned int process_ir_ctx_payloads(struct amdtp_stream *s,
+					    const struct pkt_desc *descs,
+					    unsigned int packets,
+					    struct snd_pcm_substream *pcm)
 {
 	struct amdtp_am824 *p = s->protocol;
 	unsigned int pcm_frames = 0;
+	int i;
 
-	if (pcm) {
-		read_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks,
-			     pcm_frames);
-		pcm_frames = desc->data_blocks * p->frame_multiplier;
-	}
+	for (i = 0; i < packets; ++i) {
+		const struct pkt_desc *desc = descs + i;
+		__be32 *buf = desc->ctx_payload;
+		unsigned int data_blocks = desc->data_blocks;
+
+		if (pcm) {
+			read_pcm_s32(s, pcm, buf, data_blocks, pcm_frames);
+			pcm_frames += data_blocks * p->frame_multiplier;
+		}
 
-	if (p->midi_ports) {
-		read_midi_messages(s, desc->ctx_payload, desc->data_blocks,
-				   desc->data_block_counter);
+		if (p->midi_ports) {
+			read_midi_messages(s, buf, data_blocks,
+					   desc->data_block_counter);
+		}
 	}
 
 	return pcm_frames;
@@ -400,15 +414,14 @@ static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
 int amdtp_am824_init(struct amdtp_stream *s, struct fw_unit *unit,
 		     enum amdtp_stream_direction dir, enum cip_flags flags)
 {
-	amdtp_stream_process_data_blocks_t process_data_blocks;
+	amdtp_stream_process_ctx_payloads_t process_ctx_payloads;
 
 	if (dir == AMDTP_IN_STREAM)
-		process_data_blocks = process_tx_data_blocks;
+		process_ctx_payloads = process_ir_ctx_payloads;
 	else
-		process_data_blocks = process_rx_data_blocks;
+		process_ctx_payloads = process_it_ctx_payloads;
 
 	return amdtp_stream_init(s, unit, dir, flags, CIP_FMT_AM,
-				 process_data_blocks,
-				 sizeof(struct amdtp_am824));
+			process_ctx_payloads, sizeof(struct amdtp_am824));
 }
 EXPORT_SYMBOL_GPL(amdtp_am824_init);
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index db2feb68105c..369e75e33120 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -74,16 +74,16 @@ static void pcm_period_tasklet(unsigned long data);
  * @dir: the direction of stream
  * @flags: the packet transmission method to use
  * @fmt: the value of fmt field in CIP header
- * @process_data_blocks: callback handler to process data blocks
+ * @process_ctx_payloads: callback handler to process payloads of isoc context
  * @protocol_size: the size to allocate newly for protocol
  */
 int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit,
 		      enum amdtp_stream_direction dir, enum cip_flags flags,
 		      unsigned int fmt,
-		      amdtp_stream_process_data_blocks_t process_data_blocks,
+		      amdtp_stream_process_ctx_payloads_t process_ctx_payloads,
 		      unsigned int protocol_size)
 {
-	if (process_data_blocks == NULL)
+	if (process_ctx_payloads == NULL)
 		return -EINVAL;
 
 	s->protocol = kzalloc(protocol_size, GFP_KERNEL);
@@ -102,7 +102,7 @@ int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit,
 	s->callbacked = false;
 
 	s->fmt = fmt;
-	s->process_data_blocks = process_data_blocks;
+	s->process_ctx_payloads = process_ctx_payloads;
 
 	if (dir == AMDTP_OUT_STREAM)
 		s->ctx_data.rx.syt_override = -1;
@@ -764,18 +764,13 @@ static void process_ctx_payloads(struct amdtp_stream *s,
 				 const struct pkt_desc *descs,
 				 unsigned int packets)
 {
-	int i;
-
-	for (i = 0; i < packets; ++i) {
-		const struct pkt_desc *desc = descs + i;
-		struct snd_pcm_substream *pcm = READ_ONCE(s->pcm);
-		unsigned int pcm_frames;
-
-		pcm_frames = s->process_data_blocks(s, desc, pcm);
+	struct snd_pcm_substream *pcm;
+	unsigned int pcm_frames;
 
-		if (pcm && pcm_frames > 0)
-			update_pcm_pointers(s, pcm, pcm_frames);
-	}
+	pcm = READ_ONCE(s->pcm);
+	pcm_frames = s->process_ctx_payloads(s, descs, packets, pcm);
+	if (pcm)
+		update_pcm_pointers(s, pcm, pcm_frames);
 }
 
 static void out_stream_callback(struct fw_iso_context *context, u32 tstamp,
diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h
index 0e5b85100a04..50041fa884d9 100644
--- a/sound/firewire/amdtp-stream.h
+++ b/sound/firewire/amdtp-stream.h
@@ -103,9 +103,10 @@ struct pkt_desc {
 };
 
 struct amdtp_stream;
-typedef unsigned int (*amdtp_stream_process_data_blocks_t)(
+typedef unsigned int (*amdtp_stream_process_ctx_payloads_t)(
 						struct amdtp_stream *s,
 						const struct pkt_desc *desc,
+						unsigned int packets,
 						struct snd_pcm_substream *pcm);
 struct amdtp_stream {
 	struct fw_unit *unit;
@@ -168,13 +169,13 @@ struct amdtp_stream {
 
 	/* For backends to process data blocks. */
 	void *protocol;
-	amdtp_stream_process_data_blocks_t process_data_blocks;
+	amdtp_stream_process_ctx_payloads_t process_ctx_payloads;
 };
 
 int amdtp_stream_init(struct amdtp_stream *s, struct fw_unit *unit,
 		      enum amdtp_stream_direction dir, enum cip_flags flags,
 		      unsigned int fmt,
-		      amdtp_stream_process_data_blocks_t process_data_blocks,
+		      amdtp_stream_process_ctx_payloads_t process_ctx_payloads,
 		      unsigned int protocol_size);
 void amdtp_stream_destroy(struct amdtp_stream *s);
 
diff --git a/sound/firewire/digi00x/amdtp-dot.c b/sound/firewire/digi00x/amdtp-dot.c
index cef5caf97236..d613642a2ce3 100644
--- a/sound/firewire/digi00x/amdtp-dot.c
+++ b/sound/firewire/digi00x/amdtp-dot.c
@@ -341,39 +341,53 @@ void amdtp_dot_midi_trigger(struct amdtp_stream *s, unsigned int port,
 		WRITE_ONCE(p->midi[port], midi);
 }
 
-static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-					   const struct pkt_desc *desc,
-					   struct snd_pcm_substream *pcm)
+static unsigned int process_ir_ctx_payloads(struct amdtp_stream *s,
+					    const struct pkt_desc *descs,
+					    unsigned int packets,
+					    struct snd_pcm_substream *pcm)
 {
 	unsigned int pcm_frames = 0;
+	int i;
 
-	if (pcm) {
-		read_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks,
-			     pcm_frames);
-		pcm_frames = desc->data_blocks;
-	}
+	for (i = 0; i < packets; ++i) {
+		const struct pkt_desc *desc = descs + i;
+		__be32 *buf = desc->ctx_payload;
+		unsigned int data_blocks = desc->data_blocks;
 
-	read_midi_messages(s, desc->ctx_payload, desc->data_blocks);
+		if (pcm) {
+			read_pcm_s32(s, pcm, buf, data_blocks, pcm_frames);
+			pcm_frames += data_blocks;
+		}
+
+		read_midi_messages(s, buf, data_blocks);
+	}
 
 	return pcm_frames;
 }
 
-static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-					   const struct pkt_desc *desc,
-					   struct snd_pcm_substream *pcm)
+static unsigned int process_it_ctx_payloads(struct amdtp_stream *s,
+					    const struct pkt_desc *descs,
+					    unsigned int packets,
+					    struct snd_pcm_substream *pcm)
 {
 	unsigned int pcm_frames = 0;
+	int i;
 
-	if (pcm) {
-		write_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks,
-			      pcm_frames);
-		pcm_frames = desc->data_blocks;
-	} else {
-		write_pcm_silence(s, desc->ctx_payload, desc->data_blocks);
-	}
+	for (i = 0; i < packets; ++i) {
+		const struct pkt_desc *desc = descs + i;
+		__be32 *buf = desc->ctx_payload;
+		unsigned int data_blocks = desc->data_blocks;
 
-	write_midi_messages(s, desc->ctx_payload, desc->data_blocks,
-			    desc->data_block_counter);
+		if (pcm) {
+			write_pcm_s32(s, pcm, buf, data_blocks, pcm_frames);
+			pcm_frames += data_blocks;
+		} else {
+			write_pcm_silence(s, buf, data_blocks);
+		}
+
+		write_midi_messages(s, buf, data_blocks,
+				    desc->data_block_counter);
+	}
 
 	return pcm_frames;
 }
@@ -381,20 +395,20 @@ static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
 int amdtp_dot_init(struct amdtp_stream *s, struct fw_unit *unit,
 		 enum amdtp_stream_direction dir)
 {
-	amdtp_stream_process_data_blocks_t process_data_blocks;
+	amdtp_stream_process_ctx_payloads_t process_ctx_payloads;
 	enum cip_flags flags;
 
-	/* Use different mode between incoming/outgoing. */
+	// Use different mode between incoming/outgoing.
 	if (dir == AMDTP_IN_STREAM) {
 		flags = CIP_NONBLOCKING;
-		process_data_blocks = process_tx_data_blocks;
+		process_ctx_payloads = process_ir_ctx_payloads;
 	} else {
 		flags = CIP_BLOCKING;
-		process_data_blocks = process_rx_data_blocks;
+		process_ctx_payloads = process_it_ctx_payloads;
 	}
 
 	return amdtp_stream_init(s, unit, dir, flags, CIP_FMT_AM,
-				 process_data_blocks, sizeof(struct amdtp_dot));
+				process_ctx_payloads, sizeof(struct amdtp_dot));
 }
 
 void amdtp_dot_reset(struct amdtp_stream *s)
diff --git a/sound/firewire/fireface/amdtp-ff.c b/sound/firewire/fireface/amdtp-ff.c
index cb2073cf146b..119c0076b17a 100644
--- a/sound/firewire/fireface/amdtp-ff.c
+++ b/sound/firewire/fireface/amdtp-ff.c
@@ -112,34 +112,47 @@ int amdtp_ff_add_pcm_hw_constraints(struct amdtp_stream *s,
 	return amdtp_stream_add_pcm_hw_constraints(s, runtime);
 }
 
-static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-					   const struct pkt_desc *desc,
+static unsigned int process_it_ctx_payloads(struct amdtp_stream *s,
+					   const struct pkt_desc *descs,
+					   unsigned int packets,
 					   struct snd_pcm_substream *pcm)
 {
 	unsigned int pcm_frames = 0;
-
-	if (pcm) {
-		write_pcm_s32(s, pcm, (__le32 *)desc->ctx_payload,
-			      desc->data_blocks, pcm_frames);
-		pcm_frames = desc->data_blocks;
-	} else {
-		write_pcm_silence(s, (__le32 *)desc->ctx_payload,
-				  desc->data_blocks);
+	int i;
+
+	for (i = 0; i < packets; ++i) {
+		const struct pkt_desc *desc = descs + i;
+		__le32 *buf = (__le32 *)desc->ctx_payload;
+		unsigned int data_blocks = desc->data_blocks;
+
+		if (pcm) {
+			write_pcm_s32(s, pcm, buf, data_blocks, pcm_frames);
+			pcm_frames += data_blocks;
+		} else {
+			write_pcm_silence(s, buf, data_blocks);
+		}
 	}
 
 	return pcm_frames;
 }
 
-static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-					   const struct pkt_desc *desc,
-					   struct snd_pcm_substream *pcm)
+static unsigned int process_ir_ctx_payloads(struct amdtp_stream *s,
+					    const struct pkt_desc *descs,
+					    unsigned int packets,
+					    struct snd_pcm_substream *pcm)
 {
 	unsigned int pcm_frames = 0;
+	int i;
 
-	if (pcm) {
-		read_pcm_s32(s, pcm, (__le32 *)desc->ctx_payload,
-			     desc->data_blocks, pcm_frames);
-		pcm_frames = desc->data_blocks;
+	for (i = 0; i < packets; ++i) {
+		const struct pkt_desc *desc = descs + i;
+		__le32 *buf = (__le32 *)desc->ctx_payload;
+		unsigned int data_blocks = desc->data_blocks;
+
+		if (pcm) {
+			read_pcm_s32(s, pcm, buf, data_blocks, pcm_frames);
+			pcm_frames += data_blocks;
+		}
 	}
 
 	return pcm_frames;
@@ -148,13 +161,13 @@ static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
 int amdtp_ff_init(struct amdtp_stream *s, struct fw_unit *unit,
 		  enum amdtp_stream_direction dir)
 {
-	amdtp_stream_process_data_blocks_t process_data_blocks;
+	amdtp_stream_process_ctx_payloads_t process_ctx_payloads;
 
 	if (dir == AMDTP_IN_STREAM)
-		process_data_blocks = process_tx_data_blocks;
+		process_ctx_payloads = process_ir_ctx_payloads;
 	else
-		process_data_blocks = process_rx_data_blocks;
+		process_ctx_payloads = process_it_ctx_payloads;
 
 	return amdtp_stream_init(s, unit, dir, CIP_NO_HEADER, 0,
-				 process_data_blocks, sizeof(struct amdtp_ff));
+				 process_ctx_payloads, sizeof(struct amdtp_ff));
 }
diff --git a/sound/firewire/motu/amdtp-motu.c b/sound/firewire/motu/amdtp-motu.c
index 21c6bfdf47c0..05a6e218b0ad 100644
--- a/sound/firewire/motu/amdtp-motu.c
+++ b/sound/firewire/motu/amdtp-motu.c
@@ -310,23 +310,30 @@ static void __maybe_unused copy_message(u64 *frames, __be32 *buffer,
 	}
 }
 
-static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-					   const struct pkt_desc *desc,
-					   struct snd_pcm_substream *pcm)
+static unsigned int process_ir_ctx_payloads(struct amdtp_stream *s,
+					    const struct pkt_desc *descs,
+					    unsigned int packets,
+					    struct snd_pcm_substream *pcm)
 {
 	struct amdtp_motu *p = s->protocol;
 	unsigned int pcm_frames = 0;
+	int i;
+
+	for (i = 0; i < packets; ++i) {
+		const struct pkt_desc *desc = descs + i;
+		__be32 *buf = desc->ctx_payload;
+		unsigned int data_blocks = desc->data_blocks;
 
-	trace_data_block_sph(s, desc->data_blocks, desc->ctx_payload);
-	trace_data_block_message(s, desc->data_blocks, desc->ctx_payload);
+		trace_data_block_sph(s, data_blocks, buf);
+		trace_data_block_message(s, data_blocks, buf);
 
-	if (p->midi_ports)
-		read_midi_messages(s, desc->ctx_payload, desc->data_blocks);
+		if (p->midi_ports)
+			read_midi_messages(s, buf, data_blocks);
 
-	if (pcm) {
-		read_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks,
-			     pcm_frames);
-		pcm_frames = desc->data_blocks;
+		if (pcm) {
+			read_pcm_s32(s, pcm, buf, data_blocks, pcm_frames);
+			pcm_frames += data_blocks;
+		}
 	}
 
 	return pcm_frames;
@@ -374,30 +381,37 @@ static void write_sph(struct amdtp_stream *s, __be32 *buffer,
 	}
 }
 
-static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-					   const struct pkt_desc *desc,
-					   struct snd_pcm_substream *pcm)
+static unsigned int process_it_ctx_payloads(struct amdtp_stream *s,
+					    const struct pkt_desc *descs,
+					    unsigned int packets,
+					    struct snd_pcm_substream *pcm)
 {
 	struct amdtp_motu *p = s->protocol;
 	unsigned int pcm_frames = 0;
+	int i;
 
-	/* TODO: how to interact control messages between userspace? */
+	for (i = 0; i < packets; ++i) {
+		const struct pkt_desc *desc = descs + i;
+		__be32 *buf = desc->ctx_payload;
+		unsigned int data_blocks = desc->data_blocks;
 
-	if (p->midi_ports)
-		write_midi_messages(s, desc->ctx_payload, desc->data_blocks);
+		// TODO: how to interact control messages between userspace?
 
-	if (pcm) {
-		write_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks,
-			      pcm_frames);
-		pcm_frames = desc->data_blocks;
-	} else {
-		write_pcm_silence(s, desc->ctx_payload, desc->data_blocks);
-	}
+		if (p->midi_ports)
+			write_midi_messages(s, buf, data_blocks);
 
-	write_sph(s, desc->ctx_payload, desc->data_blocks);
+		if (pcm) {
+			write_pcm_s32(s, pcm, buf, data_blocks, pcm_frames);
+			pcm_frames += data_blocks;
+		} else {
+			write_pcm_silence(s, buf, data_blocks);
+		}
 
-	trace_data_block_sph(s, desc->data_blocks, desc->ctx_payload);
-	trace_data_block_message(s, desc->data_blocks, desc->ctx_payload);
+		write_sph(s, buf, data_blocks);
+
+		trace_data_block_sph(s, data_blocks, buf);
+		trace_data_block_message(s, data_blocks, buf);
+	}
 
 	return pcm_frames;
 }
@@ -406,13 +420,13 @@ int amdtp_motu_init(struct amdtp_stream *s, struct fw_unit *unit,
 		    enum amdtp_stream_direction dir,
 		    const struct snd_motu_protocol *const protocol)
 {
-	amdtp_stream_process_data_blocks_t process_data_blocks;
+	amdtp_stream_process_ctx_payloads_t process_ctx_payloads;
 	int fmt = CIP_FMT_MOTU;
 	int flags = CIP_BLOCKING;
 	int err;
 
 	if (dir == AMDTP_IN_STREAM) {
-		process_data_blocks = process_tx_data_blocks;
+		process_ctx_payloads = process_ir_ctx_payloads;
 
 		/*
 		 * Units of version 3 transmits packets with invalid CIP header
@@ -431,11 +445,11 @@ int amdtp_motu_init(struct amdtp_stream *s, struct fw_unit *unit,
 				 CIP_SKIP_DBC_ZERO_CHECK;
 		}
 	} else {
-		process_data_blocks = process_rx_data_blocks;
+		process_ctx_payloads = process_it_ctx_payloads;
 		flags |= CIP_DBC_IS_END_EVENT;
 	}
 
-	err = amdtp_stream_init(s, unit, dir, flags, fmt, process_data_blocks,
+	err = amdtp_stream_init(s, unit, dir, flags, fmt, process_ctx_payloads,
 				sizeof(struct amdtp_motu));
 	if (err < 0)
 		return err;
diff --git a/sound/firewire/tascam/amdtp-tascam.c b/sound/firewire/tascam/amdtp-tascam.c
index 3c9abf422f24..e80bb84c43f6 100644
--- a/sound/firewire/tascam/amdtp-tascam.c
+++ b/sound/firewire/tascam/amdtp-tascam.c
@@ -175,35 +175,49 @@ static void read_status_messages(struct amdtp_stream *s,
 	}
 }
 
-static unsigned int process_tx_data_blocks(struct amdtp_stream *s,
-					   const struct pkt_desc *desc,
-					   struct snd_pcm_substream *pcm)
+static unsigned int process_ir_ctx_payloads(struct amdtp_stream *s,
+					    const struct pkt_desc *descs,
+					    unsigned int packets,
+					    struct snd_pcm_substream *pcm)
 {
 	unsigned int pcm_frames = 0;
+	int i;
 
-	if (pcm) {
-		read_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks,
-			     pcm_frames);
-		pcm_frames += desc->data_blocks;
-	}
+	for (i = 0; i < packets; ++i) {
+		const struct pkt_desc *desc = descs + i;
+		__be32 *buf = desc->ctx_payload;
+		unsigned int data_blocks = desc->data_blocks;
 
-	read_status_messages(s, desc->ctx_payload, desc->data_blocks);
+		if (pcm) {
+			read_pcm_s32(s, pcm, buf, data_blocks, pcm_frames);
+			pcm_frames += data_blocks;
+		}
+
+		read_status_messages(s, buf, data_blocks);
+	}
 
 	return pcm_frames;
 }
 
-static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
-					   const struct pkt_desc *desc,
-					   struct snd_pcm_substream *pcm)
+static unsigned int process_it_ctx_payloads(struct amdtp_stream *s,
+					    const struct pkt_desc *descs,
+					    unsigned int packets,
+					    struct snd_pcm_substream *pcm)
 {
 	unsigned int pcm_frames = 0;
+	int i;
 
-	if (pcm) {
-		write_pcm_s32(s, pcm, desc->ctx_payload, desc->data_blocks,
-			      pcm_frames);
-		pcm_frames += desc->data_blocks;
-	} else {
-		write_pcm_silence(s, desc->ctx_payload, desc->data_blocks);
+	for (i = 0; i < packets; ++i) {
+		const struct pkt_desc *desc = descs + i;
+		__be32 *buf = desc->ctx_payload;
+		unsigned int data_blocks = desc->data_blocks;
+
+		if (pcm) {
+			write_pcm_s32(s, pcm, buf, data_blocks, pcm_frames);
+			pcm_frames += data_blocks;
+		} else {
+			write_pcm_silence(s, buf, data_blocks);
+		}
 	}
 
 	return pcm_frames;
@@ -212,22 +226,22 @@ static unsigned int process_rx_data_blocks(struct amdtp_stream *s,
 int amdtp_tscm_init(struct amdtp_stream *s, struct fw_unit *unit,
 		    enum amdtp_stream_direction dir, unsigned int pcm_channels)
 {
-	amdtp_stream_process_data_blocks_t process_data_blocks;
+	amdtp_stream_process_ctx_payloads_t process_ctx_payloads;
 	struct amdtp_tscm *p;
 	unsigned int fmt;
 	int err;
 
 	if (dir == AMDTP_IN_STREAM) {
 		fmt = AMDTP_FMT_TSCM_TX;
-		process_data_blocks = process_tx_data_blocks;
+		process_ctx_payloads = process_ir_ctx_payloads;
 	} else {
 		fmt = AMDTP_FMT_TSCM_RX;
-		process_data_blocks = process_rx_data_blocks;
+		process_ctx_payloads = process_it_ctx_payloads;
 	}
 
 	err = amdtp_stream_init(s, unit, dir,
-				CIP_NONBLOCKING | CIP_SKIP_DBC_ZERO_CHECK, fmt,
-				process_data_blocks, sizeof(struct amdtp_tscm));
+			CIP_NONBLOCKING | CIP_SKIP_DBC_ZERO_CHECK, fmt,
+			process_ctx_payloads, sizeof(struct amdtp_tscm));
 	if (err < 0)
 		return 0;
 
-- 
cgit v1.2.3-59-g8ed1b