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>

1 files changed, 2 insertions, 1 deletions

diff --git a/sound/soc/stm/stm32_i2s.c b/sound/soc/stm/stm32_i2s.c
index 97d5e9901a0e..8ee697ff1f86 100644
--- a/sound/soc/stm/stm32_i2s.c
+++ b/sound/soc/stm/stm32_i2s.c
@@ -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,
 };