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-rw-r--r--sound/firewire/fireface/ff-pcm.c56
-rw-r--r--sound/firewire/fireface/ff-protocol-former.c112
-rw-r--r--sound/firewire/fireface/ff-protocol-latter.c114
-rw-r--r--sound/firewire/fireface/ff-stream.c79
-rw-r--r--sound/firewire/fireface/ff.h2
5 files changed, 176 insertions, 187 deletions
diff --git a/sound/firewire/fireface/ff-pcm.c b/sound/firewire/fireface/ff-pcm.c
index 0d40bb68db50..9eab3ad283ce 100644
--- a/sound/firewire/fireface/ff-pcm.c
+++ b/sound/firewire/fireface/ff-pcm.c
@@ -198,8 +198,8 @@ static int pcm_close(struct snd_pcm_substream *substream)
return 0;
}
-static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *hw_params)
+static int pcm_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *hw_params)
{
struct snd_ff *ff = substream->private_data;
int err;
@@ -210,58 +210,26 @@ static int pcm_capture_hw_params(struct snd_pcm_substream *substream,
return err;
if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
- mutex_lock(&ff->mutex);
- ff->substreams_counter++;
- mutex_unlock(&ff->mutex);
- }
-
- return 0;
-}
-
-static int pcm_playback_hw_params(struct snd_pcm_substream *substream,
- struct snd_pcm_hw_params *hw_params)
-{
- struct snd_ff *ff = substream->private_data;
- int err;
-
- err = snd_pcm_lib_alloc_vmalloc_buffer(substream,
- params_buffer_bytes(hw_params));
- if (err < 0)
- return err;
+ unsigned int rate = params_rate(hw_params);
- if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) {
mutex_lock(&ff->mutex);
- ff->substreams_counter++;
+ err = snd_ff_stream_reserve_duplex(ff, rate);
+ if (err >= 0)
+ ++ff->substreams_counter;
mutex_unlock(&ff->mutex);
}
return 0;
}
-static int pcm_capture_hw_free(struct snd_pcm_substream *substream)
-{
- struct snd_ff *ff = substream->private_data;
-
- mutex_lock(&ff->mutex);
-
- if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
- ff->substreams_counter--;
-
- snd_ff_stream_stop_duplex(ff);
-
- mutex_unlock(&ff->mutex);
-
- return snd_pcm_lib_free_vmalloc_buffer(substream);
-}
-
-static int pcm_playback_hw_free(struct snd_pcm_substream *substream)
+static int pcm_hw_free(struct snd_pcm_substream *substream)
{
struct snd_ff *ff = substream->private_data;
mutex_lock(&ff->mutex);
if (substream->runtime->status->state != SNDRV_PCM_STATE_OPEN)
- ff->substreams_counter--;
+ --ff->substreams_counter;
snd_ff_stream_stop_duplex(ff);
@@ -374,8 +342,8 @@ int snd_ff_create_pcm_devices(struct snd_ff *ff)
.open = pcm_open,
.close = pcm_close,
.ioctl = snd_pcm_lib_ioctl,
- .hw_params = pcm_capture_hw_params,
- .hw_free = pcm_capture_hw_free,
+ .hw_params = pcm_hw_params,
+ .hw_free = pcm_hw_free,
.prepare = pcm_capture_prepare,
.trigger = pcm_capture_trigger,
.pointer = pcm_capture_pointer,
@@ -386,8 +354,8 @@ int snd_ff_create_pcm_devices(struct snd_ff *ff)
.open = pcm_open,
.close = pcm_close,
.ioctl = snd_pcm_lib_ioctl,
- .hw_params = pcm_playback_hw_params,
- .hw_free = pcm_playback_hw_free,
+ .hw_params = pcm_hw_params,
+ .hw_free = pcm_hw_free,
.prepare = pcm_playback_prepare,
.trigger = pcm_playback_trigger,
.pointer = pcm_playback_pointer,
diff --git a/sound/firewire/fireface/ff-protocol-former.c b/sound/firewire/fireface/ff-protocol-former.c
index 8d1c2c6e907b..bf44cad7985e 100644
--- a/sound/firewire/fireface/ff-protocol-former.c
+++ b/sound/firewire/fireface/ff-protocol-former.c
@@ -293,27 +293,6 @@ static int former_fill_midi_msg(struct snd_ff *ff,
#define FF800_TX_PACKET_ISOC_CH 0x0000801c0008
-static int allocate_rx_resources(struct snd_ff *ff)
-{
- u32 data;
- __le32 reg;
- int err;
-
- // Controllers should allocate isochronous resources for rx stream.
- err = fw_iso_resources_allocate(&ff->rx_resources,
- amdtp_stream_get_max_payload(&ff->rx_stream),
- fw_parent_device(ff->unit)->max_speed);
- if (err < 0)
- return err;
-
- // Set isochronous channel and the number of quadlets of rx packets.
- data = ff->rx_stream.data_block_quadlets << 3;
- data = (data << 8) | ff->rx_resources.channel;
- reg = cpu_to_le32(data);
- return snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
- FF800_RX_PACKET_FORMAT, &reg, sizeof(reg), 0);
-}
-
static int allocate_tx_resources(struct snd_ff *ff)
{
__le32 reg;
@@ -355,8 +334,9 @@ static int allocate_tx_resources(struct snd_ff *ff)
return 0;
}
-static int ff800_begin_session(struct snd_ff *ff, unsigned int rate)
+static int ff800_allocate_resources(struct snd_ff *ff, unsigned int rate)
{
+ u32 data;
__le32 reg;
int err;
@@ -371,14 +351,38 @@ static int ff800_begin_session(struct snd_ff *ff, unsigned int rate)
// Let's sleep for a bit.
msleep(100);
- err = allocate_rx_resources(ff);
+ // Controllers should allocate isochronous resources for rx stream.
+ err = fw_iso_resources_allocate(&ff->rx_resources,
+ amdtp_stream_get_max_payload(&ff->rx_stream),
+ fw_parent_device(ff->unit)->max_speed);
if (err < 0)
return err;
- err = allocate_tx_resources(ff);
+ // Set isochronous channel and the number of quadlets of rx packets.
+ // This should be done before the allocation of tx resources to avoid
+ // periodical noise.
+ data = ff->rx_stream.data_block_quadlets << 3;
+ data = (data << 8) | ff->rx_resources.channel;
+ reg = cpu_to_le32(data);
+ err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
+ FF800_RX_PACKET_FORMAT, &reg, sizeof(reg), 0);
if (err < 0)
return err;
+ return allocate_tx_resources(ff);
+}
+
+static int ff800_begin_session(struct snd_ff *ff, unsigned int rate)
+{
+ unsigned int generation = ff->rx_resources.generation;
+ __le32 reg;
+
+ if (generation != fw_parent_device(ff->unit)->card->generation) {
+ int err = fw_iso_resources_update(&ff->rx_resources);
+ if (err < 0)
+ return err;
+ }
+
reg = cpu_to_le32(0x80000000);
reg |= cpu_to_le32(ff->tx_stream.data_block_quadlets);
if (fw_parent_device(ff->unit)->max_speed == SCODE_800)
@@ -420,6 +424,7 @@ const struct snd_ff_protocol snd_ff_protocol_ff800 = {
.fill_midi_msg = former_fill_midi_msg,
.get_clock = former_get_clock,
.switch_fetching_mode = former_switch_fetching_mode,
+ .allocate_resources = ff800_allocate_resources,
.begin_session = ff800_begin_session,
.finish_session = ff800_finish_session,
.dump_status = former_dump_status,
@@ -431,12 +436,11 @@ const struct snd_ff_protocol snd_ff_protocol_ff800 = {
#define FF400_TX_PACKET_FORMAT 0x00008010050cull
#define FF400_ISOC_COMM_STOP 0x000080100510ull
-/*
- * Fireface 400 manages isochronous channel number in 3 bit field. Therefore,
- * we can allocate between 0 and 7 channel.
- */
-static int keep_resources(struct snd_ff *ff, unsigned int rate)
+// Fireface 400 manages isochronous channel number in 3 bit field. Therefore,
+// we can allocate between 0 and 7 channel.
+static int ff400_allocate_resources(struct snd_ff *ff, unsigned int rate)
{
+ __le32 reg;
enum snd_ff_stream_mode mode;
int i;
int err;
@@ -449,11 +453,20 @@ static int keep_resources(struct snd_ff *ff, unsigned int rate)
if (i >= CIP_SFC_COUNT)
return -EINVAL;
+ // Set the number of data blocks transferred in a second.
+ reg = cpu_to_le32(rate);
+ err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
+ FF400_STF, &reg, sizeof(reg), 0);
+ if (err < 0)
+ return err;
+
+ msleep(100);
+
err = snd_ff_stream_get_multiplier_mode(i, &mode);
if (err < 0)
return err;
- /* Keep resources for in-stream. */
+ // Keep resources for in-stream.
ff->tx_resources.channels_mask = 0x00000000000000ffuLL;
err = fw_iso_resources_allocate(&ff->tx_resources,
amdtp_stream_get_max_payload(&ff->tx_stream),
@@ -461,7 +474,7 @@ static int keep_resources(struct snd_ff *ff, unsigned int rate)
if (err < 0)
return err;
- /* Keep resources for out-stream. */
+ // Keep resources for out-stream.
ff->rx_resources.channels_mask = 0x00000000000000ffuLL;
err = fw_iso_resources_allocate(&ff->rx_resources,
amdtp_stream_get_max_payload(&ff->rx_stream),
@@ -474,26 +487,22 @@ static int keep_resources(struct snd_ff *ff, unsigned int rate)
static int ff400_begin_session(struct snd_ff *ff, unsigned int rate)
{
+ unsigned int generation = ff->rx_resources.generation;
__le32 reg;
int err;
- err = keep_resources(ff, rate);
- if (err < 0)
- return err;
-
- /* Set the number of data blocks transferred in a second. */
- reg = cpu_to_le32(rate);
- err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
- FF400_STF, &reg, sizeof(reg), 0);
- if (err < 0)
- return err;
+ if (generation != fw_parent_device(ff->unit)->card->generation) {
+ err = fw_iso_resources_update(&ff->tx_resources);
+ if (err < 0)
+ return err;
- msleep(100);
+ err = fw_iso_resources_update(&ff->rx_resources);
+ if (err < 0)
+ return err;
+ }
- /*
- * Set isochronous channel and the number of quadlets of received
- * packets.
- */
+ // Set isochronous channel and the number of quadlets of received
+ // packets.
reg = cpu_to_le32(((ff->rx_stream.data_block_quadlets << 3) << 8) |
ff->rx_resources.channel);
err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
@@ -501,11 +510,9 @@ static int ff400_begin_session(struct snd_ff *ff, unsigned int rate)
if (err < 0)
return err;
- /*
- * Set isochronous channel and the number of quadlets of transmitted
- * packet.
- */
- /* TODO: investigate the purpose of this 0x80. */
+ // Set isochronous channel and the number of quadlets of transmitted
+ // packet.
+ // TODO: investigate the purpose of this 0x80.
reg = cpu_to_le32((0x80 << 24) |
(ff->tx_resources.channel << 5) |
(ff->tx_stream.data_block_quadlets));
@@ -514,7 +521,7 @@ static int ff400_begin_session(struct snd_ff *ff, unsigned int rate)
if (err < 0)
return err;
- /* Allow to transmit packets. */
+ // Allow to transmit packets.
reg = cpu_to_le32(0x00000001);
return snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
FF400_ISOC_COMM_START, &reg, sizeof(reg), 0);
@@ -591,6 +598,7 @@ const struct snd_ff_protocol snd_ff_protocol_ff400 = {
.fill_midi_msg = former_fill_midi_msg,
.get_clock = former_get_clock,
.switch_fetching_mode = former_switch_fetching_mode,
+ .allocate_resources = ff400_allocate_resources,
.begin_session = ff400_begin_session,
.finish_session = ff400_finish_session,
.dump_status = former_dump_status,
diff --git a/sound/firewire/fireface/ff-protocol-latter.c b/sound/firewire/fireface/ff-protocol-latter.c
index b30d02d359b1..0e4c3a9ed5e4 100644
--- a/sound/firewire/fireface/ff-protocol-latter.c
+++ b/sound/firewire/fireface/ff-protocol-latter.c
@@ -97,25 +97,64 @@ static int latter_switch_fetching_mode(struct snd_ff *ff, bool enable)
LATTER_FETCH_MODE, &reg, sizeof(reg), 0);
}
-static int keep_resources(struct snd_ff *ff, unsigned int rate)
+static int latter_allocate_resources(struct snd_ff *ff, unsigned int rate)
{
enum snd_ff_stream_mode mode;
+ unsigned int code;
+ __le32 reg;
+ unsigned int count;
int i;
int err;
- // Check whether the given value is supported or not.
- for (i = 0; i < CIP_SFC_COUNT; i++) {
- if (amdtp_rate_table[i] == rate)
+ // Set the number of data blocks transferred in a second.
+ if (rate % 32000 == 0)
+ code = 0x00;
+ else if (rate % 44100 == 0)
+ code = 0x02;
+ else if (rate % 48000 == 0)
+ code = 0x04;
+ else
+ return -EINVAL;
+
+ if (rate >= 64000 && rate < 128000)
+ code |= 0x08;
+ else if (rate >= 128000 && rate < 192000)
+ code |= 0x10;
+
+ reg = cpu_to_le32(code);
+ err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
+ LATTER_STF, &reg, sizeof(reg), 0);
+ if (err < 0)
+ return err;
+
+ // Confirm to shift transmission clock.
+ count = 0;
+ while (count++ < 10) {
+ unsigned int curr_rate;
+ enum snd_ff_clock_src src;
+
+ err = latter_get_clock(ff, &curr_rate, &src);
+ if (err < 0)
+ return err;
+
+ if (curr_rate == rate)
break;
}
- if (i >= CIP_SFC_COUNT)
+ if (count == 10)
+ return -ETIMEDOUT;
+
+ for (i = 0; i < ARRAY_SIZE(amdtp_rate_table); ++i) {
+ if (rate == amdtp_rate_table[i])
+ break;
+ }
+ if (i == ARRAY_SIZE(amdtp_rate_table))
return -EINVAL;
err = snd_ff_stream_get_multiplier_mode(i, &mode);
if (err < 0)
return err;
- /* Keep resources for in-stream. */
+ // Keep resources for in-stream.
ff->tx_resources.channels_mask = 0x00000000000000ffuLL;
err = fw_iso_resources_allocate(&ff->tx_resources,
amdtp_stream_get_max_payload(&ff->tx_stream),
@@ -123,7 +162,7 @@ static int keep_resources(struct snd_ff *ff, unsigned int rate)
if (err < 0)
return err;
- /* Keep resources for out-stream. */
+ // Keep resources for out-stream.
ff->rx_resources.channels_mask = 0x00000000000000ffuLL;
err = fw_iso_resources_allocate(&ff->rx_resources,
amdtp_stream_get_max_payload(&ff->rx_stream),
@@ -136,60 +175,30 @@ static int keep_resources(struct snd_ff *ff, unsigned int rate)
static int latter_begin_session(struct snd_ff *ff, unsigned int rate)
{
- static const struct {
- unsigned int stf;
- unsigned int code;
- unsigned int flag;
- } *entry, rate_table[] = {
- { 32000, 0x00, 0x92, },
- { 44100, 0x02, 0x92, },
- { 48000, 0x04, 0x92, },
- { 64000, 0x08, 0x8e, },
- { 88200, 0x0a, 0x8e, },
- { 96000, 0x0c, 0x8e, },
- { 128000, 0x10, 0x8c, },
- { 176400, 0x12, 0x8c, },
- { 192000, 0x14, 0x8c, },
- };
+ unsigned int generation = ff->rx_resources.generation;
+ unsigned int flag;
u32 data;
__le32 reg;
- unsigned int count;
- int i;
int err;
- for (i = 0; i < ARRAY_SIZE(rate_table); ++i) {
- entry = rate_table + i;
- if (entry->stf == rate)
- break;
- }
- if (i == ARRAY_SIZE(rate_table))
+ if (rate >= 32000 && rate <= 48000)
+ flag = 0x92;
+ else if (rate >= 64000 && rate <= 96000)
+ flag = 0x8e;
+ else if (rate >= 128000 && rate <= 192000)
+ flag = 0x8c;
+ else
return -EINVAL;
- reg = cpu_to_le32(entry->code);
- err = snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
- LATTER_STF, &reg, sizeof(reg), 0);
- if (err < 0)
- return err;
-
- // Confirm to shift transmission clock.
- count = 0;
- while (count++ < 10) {
- unsigned int curr_rate;
- enum snd_ff_clock_src src;
-
- err = latter_get_clock(ff, &curr_rate, &src);
+ if (generation != fw_parent_device(ff->unit)->card->generation) {
+ err = fw_iso_resources_update(&ff->tx_resources);
if (err < 0)
return err;
- if (curr_rate == rate)
- break;
+ err = fw_iso_resources_update(&ff->rx_resources);
+ if (err < 0)
+ return err;
}
- if (count == 10)
- return -ETIMEDOUT;
-
- err = keep_resources(ff, rate);
- if (err < 0)
- return err;
data = (ff->tx_resources.channel << 8) | ff->rx_resources.channel;
reg = cpu_to_le32(data);
@@ -200,7 +209,7 @@ static int latter_begin_session(struct snd_ff *ff, unsigned int rate)
// Always use the maximum number of data channels in data block of
// packet.
- reg = cpu_to_le32(entry->flag);
+ reg = cpu_to_le32(flag);
return snd_fw_transaction(ff->unit, TCODE_WRITE_QUADLET_REQUEST,
LATTER_ISOC_START, &reg, sizeof(reg), 0);
}
@@ -424,6 +433,7 @@ const struct snd_ff_protocol snd_ff_protocol_latter = {
.fill_midi_msg = latter_fill_midi_msg,
.get_clock = latter_get_clock,
.switch_fetching_mode = latter_switch_fetching_mode,
+ .allocate_resources = latter_allocate_resources,
.begin_session = latter_begin_session,
.finish_session = latter_finish_session,
.dump_status = latter_dump_status,
diff --git a/sound/firewire/fireface/ff-stream.c b/sound/firewire/fireface/ff-stream.c
index 6dfd2efb6646..4208b8004d1a 100644
--- a/sound/firewire/fireface/ff-stream.c
+++ b/sound/firewire/fireface/ff-stream.c
@@ -30,14 +30,11 @@ int snd_ff_stream_get_multiplier_mode(enum cip_sfc sfc,
return 0;
}
-static void release_resources(struct snd_ff *ff)
-{
- fw_iso_resources_free(&ff->tx_resources);
- fw_iso_resources_free(&ff->rx_resources);
-}
-
static inline void finish_session(struct snd_ff *ff)
{
+ amdtp_stream_stop(&ff->tx_stream);
+ amdtp_stream_stop(&ff->rx_stream);
+
ff->spec->protocol->finish_session(ff);
ff->spec->protocol->switch_fetching_mode(ff, false);
}
@@ -103,37 +100,25 @@ void snd_ff_stream_destroy_duplex(struct snd_ff *ff)
destroy_stream(ff, AMDTP_OUT_STREAM);
}
-int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate)
+int snd_ff_stream_reserve_duplex(struct snd_ff *ff, unsigned int rate)
{
unsigned int curr_rate;
enum snd_ff_clock_src src;
int err;
- if (ff->substreams_counter == 0)
- return 0;
-
err = ff->spec->protocol->get_clock(ff, &curr_rate, &src);
if (err < 0)
return err;
- if (curr_rate != rate ||
- amdtp_streaming_error(&ff->tx_stream) ||
- amdtp_streaming_error(&ff->rx_stream)) {
- finish_session(ff);
-
- amdtp_stream_stop(&ff->tx_stream);
- amdtp_stream_stop(&ff->rx_stream);
-
- release_resources(ff);
- }
- /*
- * Regardless of current source of clock signal, drivers transfer some
- * packets. Then, the device transfers packets.
- */
- if (!amdtp_stream_running(&ff->rx_stream)) {
+ if (ff->substreams_counter == 0 || curr_rate != rate) {
enum snd_ff_stream_mode mode;
int i;
+ finish_session(ff);
+
+ fw_iso_resources_free(&ff->tx_resources);
+ fw_iso_resources_free(&ff->rx_resources);
+
for (i = 0; i < CIP_SFC_COUNT; ++i) {
if (amdtp_rate_table[i] == rate)
break;
@@ -155,6 +140,30 @@ int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate)
if (err < 0)
return err;
+ err = ff->spec->protocol->allocate_resources(ff, rate);
+ if (err < 0)
+ return err;
+ }
+
+ return 0;
+}
+
+int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate)
+{
+ int err;
+
+ if (ff->substreams_counter == 0)
+ return 0;
+
+ if (amdtp_streaming_error(&ff->tx_stream) ||
+ amdtp_streaming_error(&ff->rx_stream))
+ finish_session(ff);
+
+ /*
+ * Regardless of current source of clock signal, drivers transfer some
+ * packets. Then, the device transfers packets.
+ */
+ if (!amdtp_stream_running(&ff->rx_stream)) {
err = ff->spec->protocol->begin_session(ff, rate);
if (err < 0)
goto error;
@@ -192,37 +201,29 @@ int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate)
return 0;
error:
- amdtp_stream_stop(&ff->tx_stream);
- amdtp_stream_stop(&ff->rx_stream);
-
finish_session(ff);
- release_resources(ff);
return err;
}
void snd_ff_stream_stop_duplex(struct snd_ff *ff)
{
- if (ff->substreams_counter > 0)
- return;
+ if (ff->substreams_counter == 0) {
+ finish_session(ff);
- amdtp_stream_stop(&ff->tx_stream);
- amdtp_stream_stop(&ff->rx_stream);
- finish_session(ff);
- release_resources(ff);
+ fw_iso_resources_free(&ff->tx_resources);
+ fw_iso_resources_free(&ff->rx_resources);
+ }
}
void snd_ff_stream_update_duplex(struct snd_ff *ff)
{
- /* The device discontinue to transfer packets. */
+ // The device discontinue to transfer packets.
amdtp_stream_pcm_abort(&ff->tx_stream);
amdtp_stream_stop(&ff->tx_stream);
amdtp_stream_pcm_abort(&ff->rx_stream);
amdtp_stream_stop(&ff->rx_stream);
-
- fw_iso_resources_update(&ff->tx_resources);
- fw_iso_resources_update(&ff->rx_resources);
}
void snd_ff_stream_lock_changed(struct snd_ff *ff)
diff --git a/sound/firewire/fireface/ff.h b/sound/firewire/fireface/ff.h
index 7fac241c2486..36dd0c75b9f7 100644
--- a/sound/firewire/fireface/ff.h
+++ b/sound/firewire/fireface/ff.h
@@ -112,6 +112,7 @@ struct snd_ff_protocol {
int (*get_clock)(struct snd_ff *ff, unsigned int *rate,
enum snd_ff_clock_src *src);
int (*switch_fetching_mode)(struct snd_ff *ff, bool enable);
+ int (*allocate_resources)(struct snd_ff *ff, unsigned int rate);
int (*begin_session)(struct snd_ff *ff, unsigned int rate);
void (*finish_session)(struct snd_ff *ff);
void (*dump_status)(struct snd_ff *ff, struct snd_info_buffer *buffer);
@@ -136,6 +137,7 @@ int snd_ff_stream_get_multiplier_mode(enum cip_sfc sfc,
enum snd_ff_stream_mode *mode);
int snd_ff_stream_init_duplex(struct snd_ff *ff);
void snd_ff_stream_destroy_duplex(struct snd_ff *ff);
+int snd_ff_stream_reserve_duplex(struct snd_ff *ff, unsigned int rate);
int snd_ff_stream_start_duplex(struct snd_ff *ff, unsigned int rate);
void snd_ff_stream_stop_duplex(struct snd_ff *ff);
void snd_ff_stream_update_duplex(struct snd_ff *ff);
generated by cgit v1.2.3 (git 2.25.1) at 2024-06-02 05:20:26 +0000