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ALSA: dice: add a helper function to restart all of available streams 

This commit is a small refactoring for better readability.

Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
This commit is contained in:
Takashi Sakamoto 2018-05-02 19:16:47 +09:00 committed by Takashi Iwai
parent ec592fd32e
commit 20b9454479
1 changed files with 62 additions and 57 deletions
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119
sound/firewire/dice/dice-stream.c
View File

@ -284,6 +284,63 @@ static int start_streams(struct snd_dice *dice, enum amdtp_stream_direction dir,
return err;
}
static int start_duplex_streams(struct snd_dice *dice, unsigned int rate)
{
struct reg_params tx_params, rx_params;
int i;
int err;
err = get_register_params(dice, &tx_params, &rx_params);
if (err < 0)
return err;
/* Stop transmission. */
stop_streams(dice, AMDTP_IN_STREAM, &tx_params);
stop_streams(dice, AMDTP_OUT_STREAM, &rx_params);
snd_dice_transaction_clear_enable(dice);
release_resources(dice);
err = ensure_phase_lock(dice);
if (err < 0) {
dev_err(&dice->unit->device, "fail to ensure phase lock\n");
return err;
}
/* Start both streams. */
err = start_streams(dice, AMDTP_IN_STREAM, rate, &tx_params);
if (err < 0)
goto error;
err = start_streams(dice, AMDTP_OUT_STREAM, rate, &rx_params);
if (err < 0)
goto error;
err = snd_dice_transaction_set_enable(dice);
if (err < 0) {
dev_err(&dice->unit->device, "fail to enable interface\n");
goto error;
}
for (i = 0; i < MAX_STREAMS; i++) {
if ((i < tx_params.count &&
!amdtp_stream_wait_callback(&dice->tx_stream[i],
CALLBACK_TIMEOUT)) ||
(i < rx_params.count &&
!amdtp_stream_wait_callback(&dice->rx_stream[i],
CALLBACK_TIMEOUT))) {
err = -ETIMEDOUT;
goto error;
}
}
return 0;
error:
stop_streams(dice, AMDTP_IN_STREAM, &tx_params);
stop_streams(dice, AMDTP_OUT_STREAM, &rx_params);
snd_dice_transaction_clear_enable(dice);
release_resources(dice);
return err;
}
/*
* MEMO: After this function, there're two states of streams:
* - None streams are running.
@ -293,8 +350,6 @@ int snd_dice_stream_start_duplex(struct snd_dice *dice, unsigned int rate)
{
unsigned int curr_rate;
unsigned int i;
struct reg_params tx_params, rx_params;
bool need_to_start = false;
enum snd_dice_rate_mode mode;
int err;
@ -321,7 +376,7 @@ int snd_dice_stream_start_duplex(struct snd_dice *dice, unsigned int rate)
break;
}
if (i < MAX_STREAMS)
need_to_start = true;
goto restart;
/* Check required streams are running or not. */
err = snd_dice_stream_get_rate_mode(dice, rate, &mode);
@ -336,61 +391,11 @@ int snd_dice_stream_start_duplex(struct snd_dice *dice, unsigned int rate)
break;
}
if (i < MAX_STREAMS)
need_to_start = true;
goto restart;
if (need_to_start) {
err = get_register_params(dice, &tx_params, &rx_params);
if (err < 0)
return err;
/* Stop transmission. */
snd_dice_transaction_clear_enable(dice);
stop_streams(dice, AMDTP_IN_STREAM, &tx_params);
stop_streams(dice, AMDTP_OUT_STREAM, &rx_params);
release_resources(dice);
err = ensure_phase_lock(dice);
if (err < 0) {
dev_err(&dice->unit->device,
"fail to ensure phase lock\n");
goto error;
}
/* Start both streams. */
err = start_streams(dice, AMDTP_IN_STREAM, rate, &tx_params);
if (err < 0)
goto error;
err = start_streams(dice, AMDTP_OUT_STREAM, rate, &rx_params);
if (err < 0)
goto error;
err = snd_dice_transaction_set_enable(dice);
if (err < 0) {
dev_err(&dice->unit->device,
"fail to enable interface\n");
goto error;
}
for (i = 0; i < MAX_STREAMS; i++) {
if ((i < tx_params.count &&
!amdtp_stream_wait_callback(&dice->tx_stream[i],
CALLBACK_TIMEOUT)) ||
(i < rx_params.count &&
!amdtp_stream_wait_callback(&dice->rx_stream[i],
CALLBACK_TIMEOUT))) {
err = -ETIMEDOUT;
goto error;
}
}
}
return err;
error:
snd_dice_transaction_clear_enable(dice);
stop_streams(dice, AMDTP_IN_STREAM, &tx_params);
stop_streams(dice, AMDTP_OUT_STREAM, &rx_params);
release_resources(dice);
return err;
return 0;
restart:
return start_duplex_streams(dice, rate);
}
/*