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| author | Takashi Sakamoto <o-takashi@sakamocchi.jp> | 2017-06-08 02:11:03 +0200 |
|---|---|---|
| committer | Takashi Iwai <tiwai@suse.de> | 2017-06-08 09:15:44 +0200 |
| commit | 55799c5ab99e8762e58c387e39f9fa36e8f14158 (patch) | |
| tree | 77cfa81930583eeeec15f0ef783b1d9be9475986 /sound/firewire/tascam/tascam-pcm.c | |
| parent | ALSA: pcm: obsolete RULES_DEBUG local macro (diff) | |
| download | linux-55799c5ab99e8762e58c387e39f9fa36e8f14158.tar.xz linux-55799c5ab99e8762e58c387e39f9fa36e8f14158.zip | |
ALSA: firewire: arrange common PCM info/constraints for AMDTP engine applications
In ALSA firewire stack, 8 drivers uses IEC 61883-1/6 engine for data
transmission. They have common PCM info/constraints and duplicated codes.
This commit unifies the codes into fireiwre-lib.
Signed-off-by: Takashi Sakamoto <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 | 35 |
1 files changed, 6 insertions, 29 deletions
diff --git a/sound/firewire/tascam/tascam-pcm.c b/sound/firewire/tascam/tascam-pcm.c index 3c4482aa7231..6ec8ec634d4d 100644 --- a/sound/firewire/tascam/tascam-pcm.c +++ b/sound/firewire/tascam/tascam-pcm.c @@ -8,41 +8,14 @@ #include "tascam.h" -static void set_buffer_params(struct snd_pcm_hardware *hw) -{ - hw->period_bytes_min = 4 * hw->channels_min; - hw->period_bytes_max = hw->period_bytes_min * 2048; - hw->buffer_bytes_max = hw->period_bytes_max * 2; - - hw->periods_min = 2; - hw->periods_max = UINT_MAX; -} - static int pcm_init_hw_params(struct snd_tscm *tscm, struct snd_pcm_substream *substream) { - static const struct snd_pcm_hardware hardware = { - .info = SNDRV_PCM_INFO_BATCH | - SNDRV_PCM_INFO_BLOCK_TRANSFER | - SNDRV_PCM_INFO_INTERLEAVED | - SNDRV_PCM_INFO_JOINT_DUPLEX | - SNDRV_PCM_INFO_MMAP | - SNDRV_PCM_INFO_MMAP_VALID, - .rates = SNDRV_PCM_RATE_44100 | - SNDRV_PCM_RATE_48000 | - SNDRV_PCM_RATE_88200 | - SNDRV_PCM_RATE_96000, - .rate_min = 44100, - .rate_max = 96000, - .channels_min = 10, - .channels_max = 18, - }; struct snd_pcm_runtime *runtime = substream->runtime; + struct snd_pcm_hardware *hw = &runtime->hw; struct amdtp_stream *stream; unsigned int pcm_channels; - runtime->hw = hardware; - if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) { runtime->hw.formats = SNDRV_PCM_FMTBIT_S32; stream = &tscm->tx_stream; @@ -59,7 +32,11 @@ static int pcm_init_hw_params(struct snd_tscm *tscm, pcm_channels += 2; runtime->hw.channels_min = runtime->hw.channels_max = pcm_channels; - set_buffer_params(&runtime->hw); + hw->rates = SNDRV_PCM_RATE_44100 | + SNDRV_PCM_RATE_48000 | + SNDRV_PCM_RATE_88200 | + SNDRV_PCM_RATE_96000; + snd_pcm_limit_hw_rates(runtime); return amdtp_tscm_add_pcm_hw_constraints(stream, runtime); } |