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SubjectApplied "ASoC: stm32: i2s: update pcm hardware constraints" to the asoc tree
The patch

ASoC: stm32: i2s: update pcm hardware constraints

has been applied to the asoc tree at for-5.2

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tree (usually sometime in the next 24 hours) and sent to Linus during
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From 4fc19fffaaf87335aafaeb059a561ef91aa6031c Mon Sep 17 00:00:00 2001
From: Olivier Moysan <>
Date: Mon, 6 May 2019 14:54:11 +0200
Subject: [PATCH] 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 <>
Signed-off-by: Mark Brown <>
sound/soc/stm/stm32_i2s.c | 3 ++-
1 file changed, 2 insertions(+), 1 deletion(-)

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 = {
.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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