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-rw-r--r--sound/firewire/amdtp-stream.c70
-rw-r--r--sound/firewire/amdtp-stream.h3
2 files changed, 58 insertions, 15 deletions
diff --git a/sound/firewire/amdtp-stream.c b/sound/firewire/amdtp-stream.c
index 1f38729c8e74..fd7c3e4d5374 100644
--- a/sound/firewire/amdtp-stream.c
+++ b/sound/firewire/amdtp-stream.c
@@ -52,9 +52,6 @@
#define CIP_FMT_AM 0x10
#define AMDTP_FDF_NO_DATA 0xff
-/* TODO: make these configurable */
-#define INTERRUPT_INTERVAL 16
-
// For iso header, tstamp and 2 CIP header.
#define IR_CTX_HEADER_SIZE_CIP 16
// For iso header and tstamp.
@@ -435,11 +432,12 @@ static void pcm_period_tasklet(unsigned long data)
snd_pcm_period_elapsed(pcm);
}
-static int queue_packet(struct amdtp_stream *s, struct fw_iso_packet *params)
+static int queue_packet(struct amdtp_stream *s, struct fw_iso_packet *params,
+ bool sched_irq)
{
int err;
- params->interrupt = IS_ALIGNED(s->packet_index + 1, INTERRUPT_INTERVAL);
+ params->interrupt = sched_irq;
params->tag = s->tag;
params->sy = 0;
@@ -457,21 +455,21 @@ end:
}
static inline int queue_out_packet(struct amdtp_stream *s,
- struct fw_iso_packet *params)
+ struct fw_iso_packet *params, bool sched_irq)
{
params->skip =
!!(params->header_length == 0 && params->payload_length == 0);
- return queue_packet(s, params);
+ return queue_packet(s, params, sched_irq);
}
static inline int queue_in_packet(struct amdtp_stream *s,
- struct fw_iso_packet *params)
+ struct fw_iso_packet *params, bool sched_irq)
{
// Queue one packet for IR context.
params->header_length = s->ctx_data.tx.ctx_header_size;
params->payload_length = s->ctx_data.tx.max_ctx_payload_length;
params->skip = false;
- return queue_packet(s, params);
+ return queue_packet(s, params, sched_irq);
}
static void generate_cip_header(struct amdtp_stream *s, __be32 cip_header[2],
@@ -779,6 +777,8 @@ static void out_stream_callback(struct fw_iso_context *context, u32 tstamp,
{
struct amdtp_stream *s = private_data;
const __be32 *ctx_header = header;
+ unsigned int events_per_period = s->events_per_period;
+ unsigned int event_count = s->event_count;
unsigned int packets;
int i;
@@ -799,6 +799,7 @@ static void out_stream_callback(struct fw_iso_context *context, u32 tstamp,
struct fw_iso_packet params;
__be32 header[IT_PKT_HEADER_SIZE_CIP / sizeof(__be32)];
} template = { {0}, {0} };
+ bool sched_irq = false;
if (s->ctx_data.rx.syt_override < 0)
syt = desc->syt;
@@ -809,12 +810,20 @@ static void out_stream_callback(struct fw_iso_context *context, u32 tstamp,
desc->data_blocks, desc->data_block_counter,
syt, i);
- if (queue_out_packet(s, &template.params) < 0) {
+ event_count += desc->data_blocks;
+ if (event_count >= events_per_period) {
+ event_count -= events_per_period;
+ sched_irq = true;
+ }
+
+ if (queue_out_packet(s, &template.params, sched_irq) < 0) {
cancel_stream(s);
return;
}
}
+ s->event_count = event_count;
+
fw_iso_context_queue_flush(s->context);
}
@@ -823,8 +832,10 @@ static void in_stream_callback(struct fw_iso_context *context, u32 tstamp,
void *private_data)
{
struct amdtp_stream *s = private_data;
- unsigned int packets;
__be32 *ctx_header = header;
+ unsigned int events_per_period = s->events_per_period;
+ unsigned int event_count = s->event_count;
+ unsigned int packets;
int i;
int err;
@@ -845,14 +856,29 @@ static void in_stream_callback(struct fw_iso_context *context, u32 tstamp,
}
for (i = 0; i < packets; ++i) {
+ const struct pkt_desc *desc = s->pkt_descs + i;
struct fw_iso_packet params = {0};
+ bool sched_irq = false;
+
+ if (err >= 0) {
+ event_count += desc->data_blocks;
+ if (event_count >= events_per_period) {
+ event_count -= events_per_period;
+ sched_irq = true;
+ }
+ } else {
+ sched_irq =
+ !((s->packet_index + 1) % s->idle_irq_interval);
+ }
- if (queue_in_packet(s, &params) < 0) {
+ if (queue_in_packet(s, &params, sched_irq) < 0) {
cancel_stream(s);
return;
}
}
+ s->event_count = event_count;
+
fw_iso_context_queue_flush(s->context);
}
@@ -913,6 +939,7 @@ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed,
[CIP_SFC_176400] = { 0, 67 },
};
unsigned int events_per_buffer = d->events_per_buffer;
+ unsigned int events_per_period = d->events_per_period;
unsigned int ctx_header_size;
unsigned int max_ctx_payload_size;
enum dma_data_direction dir;
@@ -958,11 +985,21 @@ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed,
max_ctx_payload_size -= IT_PKT_HEADER_SIZE_CIP;
}
+ // This is a case that AMDTP streams in domain run just for MIDI
+ // substream. Use the number of events equivalent to 10 msec as
+ // interval of hardware IRQ.
+ if (events_per_period == 0)
+ events_per_period = amdtp_rate_table[s->sfc] / 100;
if (events_per_buffer == 0)
- events_per_buffer = INTERRUPT_INTERVAL * 3;
+ events_per_buffer = events_per_period * 3;
+ s->idle_irq_interval =
+ DIV_ROUND_UP(CYCLES_PER_SECOND * events_per_period,
+ amdtp_rate_table[s->sfc]);
s->queue_size = DIV_ROUND_UP(CYCLES_PER_SECOND * events_per_buffer,
amdtp_rate_table[s->sfc]);
+ s->events_per_period = events_per_period;
+ s->event_count = 0;
err = iso_packets_buffer_init(&s->buffer, s->unit, s->queue_size,
max_ctx_payload_size, dir);
@@ -1002,12 +1039,15 @@ static int amdtp_stream_start(struct amdtp_stream *s, int channel, int speed,
s->packet_index = 0;
do {
struct fw_iso_packet params;
+ bool sched_irq;
+
+ sched_irq = !((s->packet_index + 1) % s->idle_irq_interval);
if (s->direction == AMDTP_IN_STREAM) {
- err = queue_in_packet(s, &params);
+ err = queue_in_packet(s, &params, sched_irq);
} else {
params.header_length = 0;
params.payload_length = 0;
- err = queue_out_packet(s, &params);
+ err = queue_out_packet(s, &params, sched_irq);
}
if (err < 0)
goto err_pkt_descs;
diff --git a/sound/firewire/amdtp-stream.h b/sound/firewire/amdtp-stream.h
index 8d541727e437..344818e936df 100644
--- a/sound/firewire/amdtp-stream.h
+++ b/sound/firewire/amdtp-stream.h
@@ -145,6 +145,9 @@ struct amdtp_stream {
int syt_override;
} rx;
} ctx_data;
+ unsigned int event_count;
+ unsigned int events_per_period;
+ unsigned int idle_irq_interval;
/* For CIP headers. */
unsigned int source_node_id_field;
generated by cgit (git 2.34.1) at 2024-06-06 18:29:48 +0000