From ec592fd32e102ec91d7c61c901093ce17878ccb7 Mon Sep 17 00:00:00 2001 From: Takashi Sakamoto Date: Wed, 2 May 2018 19:16:46 +0900 Subject: ALSA: dice: use cache of stream format to check running stream At present, to check running stream, available stream formats are used at current sampling transmission frequency (stf). But when changing stf, it's convenient to use cache of stream formats. This commit applies this idea. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- sound/firewire/dice/dice-stream.c | 50 ++++++++++++++++++++++++--------------- 1 file changed, 31 insertions(+), 19 deletions(-) (limited to 'sound/firewire/dice') diff --git a/sound/firewire/dice/dice-stream.c b/sound/firewire/dice/dice-stream.c index d3fb460bb86c..b792e7bb6b14 100644 --- a/sound/firewire/dice/dice-stream.c +++ b/sound/firewire/dice/dice-stream.c @@ -294,16 +294,14 @@ 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; + bool need_to_start = false; + enum snd_dice_rate_mode mode; int err; if (dice->substreams_counter == 0) return -EIO; - err = get_register_params(dice, &tx_params, &rx_params); - if (err < 0) - return err; - + /* Check sampling transmission frequency. */ err = snd_dice_transaction_get_rate(dice, &curr_rate); if (err < 0) { dev_err(&dice->unit->device, @@ -315,22 +313,36 @@ int snd_dice_stream_start_duplex(struct snd_dice *dice, unsigned int rate) if (rate != curr_rate) return -EINVAL; - /* Judge to need to restart streams. */ - for (i = 0; i < MAX_STREAMS; i++) { - if (i < tx_params.count) { - if (amdtp_streaming_error(&dice->tx_stream[i]) || - !amdtp_stream_running(&dice->tx_stream[i])) - break; - } - if (i < rx_params.count) { - if (amdtp_streaming_error(&dice->rx_stream[i]) || - !amdtp_stream_running(&dice->rx_stream[i])) - break; - } + /* Check error of packet streaming. */ + for (i = 0; i < MAX_STREAMS; ++i) { + if (amdtp_streaming_error(&dice->tx_stream[i])) + break; + if (amdtp_streaming_error(&dice->rx_stream[i])) + break; + } + if (i < MAX_STREAMS) + need_to_start = true; + + /* Check required streams are running or not. */ + err = snd_dice_stream_get_rate_mode(dice, rate, &mode); + if (err < 0) + return err; + for (i = 0; i < MAX_STREAMS; ++i) { + if (dice->tx_pcm_chs[i][mode] > 0 && + !amdtp_stream_running(&dice->tx_stream[i])) + break; + if (dice->rx_pcm_chs[i][mode] > 0 && + !amdtp_stream_running(&dice->rx_stream[i])) + break; } - need_to_start = (i < MAX_STREAMS); + if (i < MAX_STREAMS) + need_to_start = true; 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); @@ -341,7 +353,7 @@ int snd_dice_stream_start_duplex(struct snd_dice *dice, unsigned int rate) if (err < 0) { dev_err(&dice->unit->device, "fail to ensure phase lock\n"); - return err; + goto error; } /* Start both streams. */ -- cgit v1.2.3