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[1/2] ASoC: stm32: i2s: update pcm hardware constraints

Message ID 1557147252-18679-2-git-send-email-olivier.moysan@st.com (mailing list archive)
State Accepted
Commit 4fc19fffaaf87335aafaeb059a561ef91aa6031c
Headers show
Series ASoC: stm32: i2s: add some features | expand

Commit Message

Olivier MOYSAN May 6, 2019, 12:54 p.m. UTC 
- 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>
---
 sound/soc/stm/stm32_i2s.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)
diff mbox series

Patch

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,
 };