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ASoC: stm32: i2s: update pcm hardware constraints
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- 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>
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Olivier Moysan authored and Mark Brown committed May 8, 2019
1 parent 939507f commit 4fc19ff
Showing 1 changed file with 2 additions and 1 deletion.
3 changes: 2 additions & 1 deletion sound/soc/stm/stm32_i2s.c
Original file line number Diff line number Diff line change
Expand Up @@ -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 = {
.info = SNDRV_PCM_INFO_INTERLEAVED | SNDRV_PCM_INFO_MMAP,
.buffer_bytes_max = 8 * PAGE_SIZE,
.period_bytes_max = 2048,
.period_bytes_min = 1024,
.period_bytes_max = 4 * PAGE_SIZE,
.periods_min = 2,
.periods_max = 8,
};
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