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ALSA: firewire-lib: code cleanup for incoming packet handling

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In previous commit, this module has no need to reuse parameters of
incoming packets for outgoing packets anymore. This commit arranges some
needless codes for incoming packet processing.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2016-05-09 23:15:54 +09:00 committed by Takashi Iwai
parent dec63cc8b6
commit d9a16fc926
1 changed files with 21 additions and 23 deletions
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44
sound/firewire/amdtp-stream.c
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@ -447,17 +447,18 @@ static int handle_out_packet(struct amdtp_stream *s, unsigned int data_blocks,
}
static int handle_in_packet(struct amdtp_stream *s,
unsigned int payload_quadlets, __be32 *buffer,
unsigned int *data_blocks, unsigned int cycle,
unsigned int syt)
unsigned int payload_quadlets, unsigned int cycle)
{
__be32 *buffer;
u32 cip_header[2];
unsigned int fmt, fdf;
unsigned int fmt, fdf, syt;
unsigned int data_block_quadlets, data_block_counter, dbc_interval;
unsigned int data_blocks;
struct snd_pcm_substream *pcm;
unsigned int pcm_frames;
bool lost;
buffer = s->buffer.packets[s->packet_index].buffer;
cip_header[0] = be32_to_cpu(buffer[0]);
cip_header[1] = be32_to_cpu(buffer[1]);
@ -472,7 +473,7 @@ static int handle_in_packet(struct amdtp_stream *s,
dev_info_ratelimited(&s->unit->device,
"Invalid CIP header for AMDTP: %08X:%08X\n",
cip_header[0], cip_header[1]);
*data_blocks = 0;
data_blocks = 0;
pcm_frames = 0;
goto end;
}
@ -483,7 +484,7 @@ static int handle_in_packet(struct amdtp_stream *s,
dev_info_ratelimited(&s->unit->device,
"Detect unexpected protocol: %08x %08x\n",
cip_header[0], cip_header[1]);
*data_blocks = 0;
data_blocks = 0;
pcm_frames = 0;
goto end;
}
@ -492,7 +493,7 @@ static int handle_in_packet(struct amdtp_stream *s,
fdf = (cip_header[1] & CIP_FDF_MASK) >> CIP_FDF_SHIFT;
if (payload_quadlets < 3 ||
(fmt == CIP_FMT_AM && fdf == AMDTP_FDF_NO_DATA)) {
*data_blocks = 0;
data_blocks = 0;
} else {
data_block_quadlets =
(cip_header[0] & CIP_DBS_MASK) >> CIP_DBS_SHIFT;
@ -506,12 +507,12 @@ static int handle_in_packet(struct amdtp_stream *s,
if (s->flags & CIP_WRONG_DBS)
data_block_quadlets = s->data_block_quadlets;
*data_blocks = (payload_quadlets - 2) / data_block_quadlets;
data_blocks = (payload_quadlets - 2) / data_block_quadlets;
}
/* Check data block counter continuity */
data_block_counter = cip_header[0] & CIP_DBC_MASK;
if (*data_blocks == 0 && (s->flags & CIP_EMPTY_HAS_WRONG_DBC) &&
if (data_blocks == 0 && (s->flags & CIP_EMPTY_HAS_WRONG_DBC) &&
s->data_block_counter != UINT_MAX)
data_block_counter = s->data_block_counter;
@ -522,10 +523,10 @@ static int handle_in_packet(struct amdtp_stream *s,
} else if (!(s->flags & CIP_DBC_IS_END_EVENT)) {
lost = data_block_counter != s->data_block_counter;
} else {
if ((*data_blocks > 0) && (s->tx_dbc_interval > 0))
if (data_blocks > 0 && s->tx_dbc_interval > 0)
dbc_interval = s->tx_dbc_interval;
else
dbc_interval = *data_blocks;
dbc_interval = data_blocks;
lost = data_block_counter !=
((s->data_block_counter + dbc_interval) & 0xff);
@ -538,13 +539,14 @@ static int handle_in_packet(struct amdtp_stream *s,
return -EIO;
}
pcm_frames = s->process_data_blocks(s, buffer + 2, *data_blocks, &syt);
syt = be32_to_cpu(buffer[1]) & CIP_SYT_MASK;
pcm_frames = s->process_data_blocks(s, buffer + 2, data_blocks, &syt);
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;
(data_block_counter + data_blocks) & 0xff;
end:
if (queue_in_packet(s) < 0)
return -EIO;
@ -618,10 +620,9 @@ static void in_stream_callback(struct fw_iso_context *context, u32 tstamp,
void *private_data)
{
struct amdtp_stream *s = private_data;
unsigned int p, syt, packets;
unsigned int i, packets;
unsigned int payload_quadlets, max_payload_quadlets;
unsigned int data_blocks;
__be32 *buffer, *headers = header;
__be32 *headers = header;
u32 cycle;
if (s->packet_index < 0)
@ -638,13 +639,12 @@ static void in_stream_callback(struct fw_iso_context *context, u32 tstamp,
/* For buffer-over-run prevention. */
max_payload_quadlets = amdtp_stream_get_max_payload(s) / 4;
for (p = 0; p < packets; p++) {
for (i = 0; i < packets; i++) {
cycle = increment_cycle_count(cycle, 1);
buffer = s->buffer.packets[s->packet_index].buffer;
/* The number of quadlets in this packet */
payload_quadlets =
(be32_to_cpu(headers[p]) >> ISO_DATA_LENGTH_SHIFT) / 4;
(be32_to_cpu(headers[i]) >> ISO_DATA_LENGTH_SHIFT) / 4;
if (payload_quadlets > max_payload_quadlets) {
dev_err(&s->unit->device,
"Detect jumbo payload: %02x %02x\n",
@ -652,14 +652,12 @@ static void in_stream_callback(struct fw_iso_context *context, u32 tstamp,
break;
}
syt = be32_to_cpu(buffer[1]) & CIP_SYT_MASK;
if (handle_in_packet(s, payload_quadlets, buffer,
&data_blocks, cycle, syt) < 0)
if (handle_in_packet(s, payload_quadlets, cycle) < 0)
break;
}
/* Queueing error or detecting invalid payload. */
if (p < packets) {
if (i < packets) {
s->packet_index = -1;
amdtp_stream_pcm_abort(s);
return;