This commit is a part of preparation to perform allocation/release of isochronous resources in pcm.hw_params/hw_free callbacks.
The registration of isochronous channels is done just after allocation of isochronous resources. This commit separates the registration just before starting packet streaming.
Signed-off-by: Takashi Sakamoto o-takashi@sakamocchi.jp --- sound/firewire/digi00x/digi00x-stream.c | 41 ++++++++++++------------- 1 file changed, 19 insertions(+), 22 deletions(-)
diff --git a/sound/firewire/digi00x/digi00x-stream.c b/sound/firewire/digi00x/digi00x-stream.c index 4d3b4ebbdd49..455c43e81850 100644 --- a/sound/firewire/digi00x/digi00x-stream.c +++ b/sound/firewire/digi00x/digi00x-stream.c @@ -130,6 +130,12 @@ static void finish_session(struct snd_dg00x *dg00x) snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST, DG00X_ADDR_BASE + DG00X_OFFSET_STREAMING_SET, &data, sizeof(data), 0); + + // Unregister isochronous channels for both direction. + data = 0; + snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST, + DG00X_ADDR_BASE + DG00X_OFFSET_ISOC_CHANNELS, + &data, sizeof(data), 0); }
static int begin_session(struct snd_dg00x *dg00x) @@ -138,6 +144,15 @@ static int begin_session(struct snd_dg00x *dg00x) u32 curr; int err;
+ // Register isochronous channels for both direction. + data = cpu_to_be32((dg00x->tx_resources.channel << 16) | + dg00x->rx_resources.channel); + err = snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST, + DG00X_ADDR_BASE + DG00X_OFFSET_ISOC_CHANNELS, + &data, sizeof(data), 0); + if (err < 0) + goto error; + err = snd_fw_transaction(dg00x->unit, TCODE_READ_QUADLET_REQUEST, DG00X_ADDR_BASE + DG00X_OFFSET_STREAMING_STATE, &data, sizeof(data), 0); @@ -171,13 +186,6 @@ static int begin_session(struct snd_dg00x *dg00x)
static void release_resources(struct snd_dg00x *dg00x) { - __be32 data = 0; - - /* Unregister isochronous channels for both direction. */ - snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST, - DG00X_ADDR_BASE + DG00X_OFFSET_ISOC_CHANNELS, - &data, sizeof(data), 0); - /* Release isochronous resources. */ fw_iso_resources_free(&dg00x->tx_resources); fw_iso_resources_free(&dg00x->rx_resources); @@ -186,7 +194,6 @@ static void release_resources(struct snd_dg00x *dg00x) static int keep_resources(struct snd_dg00x *dg00x, unsigned int rate) { unsigned int i; - __be32 data; int err;
/* Check sampling rate. */ @@ -216,22 +223,12 @@ static int keep_resources(struct snd_dg00x *dg00x, unsigned int rate) err = fw_iso_resources_allocate(&dg00x->tx_resources, amdtp_stream_get_max_payload(&dg00x->tx_stream), fw_parent_device(dg00x->unit)->max_speed); - if (err < 0) - goto error; - - /* Register isochronous channels for both direction. */ - data = cpu_to_be32((dg00x->tx_resources.channel << 16) | - dg00x->rx_resources.channel); - err = snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST, - DG00X_ADDR_BASE + DG00X_OFFSET_ISOC_CHANNELS, - &data, sizeof(data), 0); - if (err < 0) - goto error; + if (err < 0) { + fw_iso_resources_free(&dg00x->rx_resources); + return err; + }
return 0; -error: - release_resources(dg00x); - return err; }
int snd_dg00x_stream_init_duplex(struct snd_dg00x *dg00x)