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ALSA: firewire-digi00x: code refactoring to finish streaming session 

This commit is a part of preparation to perform allocation/release
of isochronous resources in pcm.hw_params/hw_free callbacks.

The operation to finish packet streaming corresponds to stopping
isochronous contexts. This commit applies code refactoring to
move codes to stop into a helper function to finish the session.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2019-06-11 22:21:08 +09:00 committed by Takashi Iwai
parent 6bc9322936
commit d18b0a6e42
1 changed files with 9 additions and 13 deletions
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22
sound/firewire/digi00x/digi00x-stream.c
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@ -125,8 +125,12 @@ int snd_dg00x_stream_get_external_rate(struct snd_dg00x *dg00x,
static void finish_session(struct snd_dg00x *dg00x)
{
__be32 data = cpu_to_be32(0x00000003);
__be32 data;
amdtp_stream_stop(&dg00x->tx_stream);
amdtp_stream_stop(&dg00x->rx_stream);
data = cpu_to_be32(0x00000003);
snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST,
DG00X_ADDR_BASE + DG00X_OFFSET_STREAMING_SET,
&data, sizeof(data), 0);
@ -136,6 +140,10 @@ static void finish_session(struct snd_dg00x *dg00x)
snd_fw_transaction(dg00x->unit, TCODE_WRITE_QUADLET_REQUEST,
DG00X_ADDR_BASE + DG00X_OFFSET_ISOC_CHANNELS,
&data, sizeof(data), 0);
// Just after finishing the session, the device may lost transmitting
// functionality for a short time.
msleep(50);
}
static int begin_session(struct snd_dg00x *dg00x)
@ -289,8 +297,6 @@ int snd_dg00x_stream_start_duplex(struct snd_dg00x *dg00x, unsigned int rate)
amdtp_streaming_error(&dg00x->rx_stream)) {
finish_session(dg00x);
amdtp_stream_stop(&dg00x->tx_stream);
amdtp_stream_stop(&dg00x->rx_stream);
release_resources(dg00x);
}
@ -346,8 +352,6 @@ int snd_dg00x_stream_start_duplex(struct snd_dg00x *dg00x, unsigned int rate)
error:
finish_session(dg00x);
amdtp_stream_stop(&dg00x->tx_stream);
amdtp_stream_stop(&dg00x->rx_stream);
release_resources(dg00x);
return err;
@ -358,16 +362,8 @@ void snd_dg00x_stream_stop_duplex(struct snd_dg00x *dg00x)
if (dg00x->substreams_counter > 0)
return;
amdtp_stream_stop(&dg00x->tx_stream);
amdtp_stream_stop(&dg00x->rx_stream);
finish_session(dg00x);
release_resources(dg00x);
/*
* Just after finishing the session, the device may lost transmitting
* functionality for a short time.
*/
msleep(50);
}
void snd_dg00x_stream_update_duplex(struct snd_dg00x *dg00x)