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| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2019-10-18 00:54:19 +0900 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2019-10-18 04:35:50 +0200 |
| commit | 128307d5f947d43a89e68dd8357879a0f111821d (patch) | |
| tree | 2687fc2becab1e2d0a3a87e61f59382ffe7d20b9 /sound/firewire/tascam/tascam-pcm.c | |
| parent | 76c4ecbe4b07c0d1b1aba31bf2a7f20cccbdbb4e (diff) | |
| download | linux-128307d5f947d43a89e68dd8357879a0f111821d.tar.bz2 | |
ALSA: firewire-tascam: share PCM buffer size for both direction
This commit allows ALSA firewire-tascam driver to share PCM buffer
size for both capture and playback PCM substream. When AMDTP domain
starts for one of the PCM substream, buffer size of the PCM substream
is stores to AMDTP domain structure. Some AMDTP streams have already
run with the buffer size when another PCM substream starts, therefore
the PCM substream has a constraint to its buffer size.
Signed-off-by: Takashi Sakamoto <o-takashi@sakamocchi.jp>
Link: https://lore.kernel.org/r/20191017155424.885-8-o-takashi@sakamocchi.jp
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Diffstat (limited to 'sound/firewire/tascam/tascam-pcm.c')
| -rw-r--r-- | sound/firewire/tascam/tascam-pcm.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/sound/firewire/tascam/tascam-pcm.c b/sound/firewire/tascam/tascam-pcm.c index 6cd3a420fbdf..b18664fdf955 100644 --- a/sound/firewire/tascam/tascam-pcm.c +++ b/sound/firewire/tascam/tascam-pcm.c @@ -66,6 +66,7 @@ static int pcm_open(struct snd_pcm_substream *substream) // at current one. if (clock != SND_TSCM_CLOCK_INTERNAL || tscm->substreams_counter > 0) { unsigned int frames_per_period = d->events_per_period; + unsigned int frames_per_buffer = d->events_per_buffer; unsigned int rate; err = snd_tscm_stream_get_rate(tscm, &rate); @@ -83,6 +84,14 @@ static int pcm_open(struct snd_pcm_substream *substream) mutex_unlock(&tscm->mutex); goto err_locked; } + + err = snd_pcm_hw_constraint_minmax(substream->runtime, + SNDRV_PCM_HW_PARAM_BUFFER_SIZE, + frames_per_buffer, frames_per_buffer); + if (err < 0) { + mutex_unlock(&tscm->mutex); + goto err_locked; + } } mutex_unlock(&tscm->mutex); @@ -118,10 +127,11 @@ static int pcm_hw_params(struct snd_pcm_substream *substream, if (substream->runtime->status->state == SNDRV_PCM_STATE_OPEN) { unsigned int rate = params_rate(hw_params); unsigned int frames_per_period = params_period_size(hw_params); + unsigned int frames_per_buffer = params_buffer_size(hw_params); mutex_lock(&tscm->mutex); err = snd_tscm_stream_reserve_duplex(tscm, rate, - frames_per_period); + frames_per_period, frames_per_buffer); if (err >= 0) ++tscm->substreams_counter; mutex_unlock(&tscm->mutex); |