From: Takashi Sakamoto Date: Wed, 12 Jun 2019 08:44:11 +0000 (+0900) Subject: ALSA: fireworks: configure sampling transfer frequency in pcm.hw_params callback X-Git-Tag: v5.4-rc1~52^2~134 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=3d7250667ea96e7f9738caa6d5af85d87982066e;p=platform%2Fkernel%2Flinux-rpi.git ALSA: fireworks: configure sampling transfer frequency in pcm.hw_params callback This commit is a part of preparation to perform allocation/release of isochronous resources in pcm.hw_params/hw_free callbacks. At present, several operations are done in pcm.prepare callback. To reduce load of the callback, This commit splits out an operation to set sampling transfer frequency in pcm.hw_params callback. Signed-off-by: Takashi Sakamoto Signed-off-by: Takashi Iwai --- diff --git a/sound/firewire/fireworks/fireworks.h b/sound/firewire/fireworks/fireworks.h index 42a7303..0c1802a 100644 --- a/sound/firewire/fireworks/fireworks.h +++ b/sound/firewire/fireworks/fireworks.h @@ -206,7 +206,8 @@ int snd_efw_command_get_sampling_rate(struct snd_efw *efw, unsigned int *rate); int snd_efw_command_set_sampling_rate(struct snd_efw *efw, unsigned int rate); int snd_efw_stream_init_duplex(struct snd_efw *efw); -int snd_efw_stream_start_duplex(struct snd_efw *efw, unsigned int rate); +int snd_efw_stream_reserve_duplex(struct snd_efw *efw, unsigned int rate); +int snd_efw_stream_start_duplex(struct snd_efw *efw); void snd_efw_stream_stop_duplex(struct snd_efw *efw); void snd_efw_stream_update_duplex(struct snd_efw *efw); void snd_efw_stream_destroy_duplex(struct snd_efw *efw); diff --git a/sound/firewire/fireworks/fireworks_midi.c b/sound/firewire/fireworks/fireworks_midi.c index ee5dc7b..6d3d942e 100644 --- a/sound/firewire/fireworks/fireworks_midi.c +++ b/sound/firewire/fireworks/fireworks_midi.c @@ -18,8 +18,11 @@ static int midi_open(struct snd_rawmidi_substream *substream) goto end; mutex_lock(&efw->mutex); - ++efw->substreams_counter; - err = snd_efw_stream_start_duplex(efw, 0); + err = snd_efw_stream_reserve_duplex(efw, 0); + if (err >= 0) { + ++efw->substreams_counter; + err = snd_efw_stream_start_duplex(efw); + } mutex_unlock(&efw->mutex); if (err < 0) snd_efw_stream_lock_release(efw); diff --git a/sound/firewire/fireworks/fireworks_pcm.c b/sound/firewire/fireworks/fireworks_pcm.c index 398a6ad..287fc05 100644 --- a/sound/firewire/fireworks/fireworks_pcm.c +++ b/sound/firewire/fireworks/fireworks_pcm.c @@ -231,12 +231,16 @@ static int pcm_hw_params(struct snd_pcm_substream *substream, return err; if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { + unsigned int rate = params_rate(hw_params); + mutex_lock(&efw->mutex); - ++efw->substreams_counter; + err = snd_efw_stream_reserve_duplex(efw, rate); + if (err >= 0) + ++efw->substreams_counter; mutex_unlock(&efw->mutex); } - return 0; + return err; } static int pcm_hw_free(struct snd_pcm_substream *substream) @@ -257,10 +261,9 @@ static int pcm_hw_free(struct snd_pcm_substream *substream) static int pcm_capture_prepare(struct snd_pcm_substream *substream) { struct snd_efw *efw = substream->private_data; - struct snd_pcm_runtime *runtime = substream->runtime; int err; - err = snd_efw_stream_start_duplex(efw, runtime->rate); + err = snd_efw_stream_start_duplex(efw); if (err >= 0) amdtp_stream_pcm_prepare(&efw->tx_stream); @@ -269,10 +272,9 @@ static int pcm_capture_prepare(struct snd_pcm_substream *substream) static int pcm_playback_prepare(struct snd_pcm_substream *substream) { struct snd_efw *efw = substream->private_data; - struct snd_pcm_runtime *runtime = substream->runtime; int err; - err = snd_efw_stream_start_duplex(efw, runtime->rate); + err = snd_efw_stream_start_duplex(efw); if (err >= 0) amdtp_stream_pcm_prepare(&efw->rx_stream); diff --git a/sound/firewire/fireworks/fireworks_stream.c b/sound/firewire/fireworks/fireworks_stream.c index 2df39be..e1ebead 100644 --- a/sound/firewire/fireworks/fireworks_stream.c +++ b/sound/firewire/fireworks/fireworks_stream.c @@ -189,47 +189,63 @@ end: return err; } -int snd_efw_stream_start_duplex(struct snd_efw *efw, unsigned int rate) +int snd_efw_stream_reserve_duplex(struct snd_efw *efw, unsigned int rate) { unsigned int curr_rate; - int err = 0; - - // Need no substreams. - if (efw->substreams_counter == 0) - return -EIO; + int err; - /* - * Considering JACK/FFADO streaming: - * TODO: This can be removed hwdep functionality becomes popular. - */ + // Considering JACK/FFADO streaming: + // TODO: This can be removed hwdep functionality becomes popular. err = check_connection_used_by_others(efw, &efw->rx_stream); if (err < 0) - goto end; + return err; - /* stop streams if rate is different */ + // stop streams if rate is different. err = snd_efw_command_get_sampling_rate(efw, &curr_rate); if (err < 0) - goto end; + return err; if (rate == 0) rate = curr_rate; - if (rate != curr_rate || - amdtp_streaming_error(&efw->tx_stream) || - amdtp_streaming_error(&efw->rx_stream)) { + if (rate != curr_rate) { stop_stream(efw, &efw->tx_stream); stop_stream(efw, &efw->rx_stream); } - /* master should be always running */ - if (!amdtp_stream_running(&efw->rx_stream)) { + if (efw->substreams_counter == 0 || rate != curr_rate) { err = snd_efw_command_set_sampling_rate(efw, rate); if (err < 0) - goto end; + return err; + } + + return 0; +} + +int snd_efw_stream_start_duplex(struct snd_efw *efw) +{ + unsigned int rate; + int err = 0; + + // Need no substreams. + if (efw->substreams_counter == 0) + return -EIO; + + err = snd_efw_command_get_sampling_rate(efw, &rate); + if (err < 0) + return err; + if (amdtp_streaming_error(&efw->rx_stream) || + amdtp_streaming_error(&efw->tx_stream)) { + stop_stream(efw, &efw->rx_stream); + stop_stream(efw, &efw->tx_stream); + } + + /* master should be always running */ + if (!amdtp_stream_running(&efw->rx_stream)) { err = start_stream(efw, &efw->rx_stream, rate); if (err < 0) { dev_err(&efw->unit->device, "fail to start AMDTP master stream:%d\n", err); - goto end; + goto error; } } @@ -238,11 +254,14 @@ int snd_efw_stream_start_duplex(struct snd_efw *efw, unsigned int rate) if (err < 0) { dev_err(&efw->unit->device, "fail to start AMDTP slave stream:%d\n", err); - stop_stream(efw, &efw->tx_stream); - stop_stream(efw, &efw->rx_stream); + goto error; } } -end: + + return 0; +error: + stop_stream(efw, &efw->rx_stream); + stop_stream(efw, &efw->tx_stream); return err; }