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ASoC: stm32: i2s: update pcm hardware constraints 

- Set period minimum size. Ensure at least 5ms period
up to 48kHz/16 bits to prevent underrun/overrun.
- Remove MDMA constraints on period maximum size and
set period maximum to half the buffer maximum size.

Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Olivier Moysan 2019-05-06 14:54:11 +02:00 committed by Mark Brown
parent 939507f277
commit 4fc19fffaa
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GPG Key ID: 24D68B725D5487D0
1 changed files with 2 additions and 1 deletions
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sound/soc/stm/stm32_i2s.c
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@ -731,7 +731,8 @@ static const struct snd_soc_dai_ops stm32_i2s_pcm_dai_ops = {
static const struct snd_pcm_hardware stm32_i2s_pcm_hw = { static const struct snd_pcm_hardware stm32_i2s_pcm_hw = {
.info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP, .info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP,
.buffer_bytes_max = 8 * PAGE_SIZE, .buffer_bytes_max = 8 * PAGE_SIZE,
.period_bytes_max = 2048, .period_bytes_min = 1024,
.period_bytes_max = 4 * PAGE_SIZE,
.periods_min = 2, .periods_min = 2,
.periods_max = 8, .periods_max = 8,
}; };