ALSA: firewire-motu: use table-based calculation of packet formats for stream management

This commit uses table-based calculation of packet formats for stream
management.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20200519111641.123211-11-o-takashi@sakamocchi.jpSigned-off-by: Takashi Iwai <tiwai@suse.de>

sound/firewire/motu/amdtp-motu.c

@@ -76,15 +76,11 @@ int amdtp_motu_set_parameters(struct amdtp_stream *s, unsigned int rate,
 	if (i == ARRAY_SIZE(snd_motu_clock_rates))
 		return -EINVAL;
 
-	pcm_chunks = formats->fixed_part_pcm_chunks[mode] +
-		     formats->differed_part_pcm_chunks[mode];
+	// Each data block includes SPH in its head. Data chunks follow with
+	// 3 byte alignment. Padding follows with zero to conform to quadlet
+	// alignment.
+	pcm_chunks = formats->pcm_chunks[mode];
 	data_chunks = formats->msg_chunks + pcm_chunks;
-
-	/*
-	 * Each data block includes SPH in its head. Data chunks follow with
-	 * 3 byte alignment. Padding follows with zero to conform to quadlet
-	 * alignment.
-	 */
 	data_block_quadlets = 1 + DIV_ROUND_UP(data_chunks * 3, 4);
 
 	err = amdtp_stream_set_parameters(s, rate, data_block_quadlets);

sound/firewire/motu/motu-stream.c

@@ -201,9 +201,9 @@ static int ensure_packet_formats(struct snd_motu *motu)
 	data &= ~(TX_PACKET_EXCLUDE_DIFFERED_DATA_CHUNKS |
 		  RX_PACKET_EXCLUDE_DIFFERED_DATA_CHUNKS|
 		  TX_PACKET_TRANSMISSION_SPEED_MASK);
-	if (motu->tx_packet_formats.differed_part_pcm_chunks[0] == 0)
+	if (motu->spec->tx_fixed_pcm_chunks[0] == motu->tx_packet_formats.pcm_chunks[0])
 		data |= TX_PACKET_EXCLUDE_DIFFERED_DATA_CHUNKS;
-	if (motu->rx_packet_formats.differed_part_pcm_chunks[0] == 0)
+	if (motu->spec->rx_fixed_pcm_chunks[0] == motu->rx_packet_formats.pcm_chunks[0])
 		data |= RX_PACKET_EXCLUDE_DIFFERED_DATA_CHUNKS;
 	data |= fw_parent_device(motu->unit)->max_speed;