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ASoC: meson: axg-fifo: relax period size constraints

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Now that the fifo depths and thresholds are properly in the axg-fifo
driver, we can relax the constraints on period. As long as the period is a
multiple of the fifo burst size (8 bytes) things should be OK.

Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
Link: https://lore.kernel.org/r/20191218172420.1199117-5-jbrunet@baylibre.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Jerome Brunet 2019-12-18 18:24:20 +01:00 committed by Mark Brown
parent 23b89e1d62
commit 42b5ac832b
No known key found for this signature in database
GPG key ID: 24D68B725D5487D0
2 changed files with 4 additions and 6 deletions
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8
sound/soc/meson/axg-fifo.c
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@ -34,7 +34,7 @@ static struct snd_pcm_hardware axg_fifo_hw = {
.rate_max = 192000,
.channels_min = 1,
.channels_max = AXG_FIFO_CH_MAX,
.period_bytes_min = AXG_FIFO_MIN_DEPTH,
.period_bytes_min = AXG_FIFO_BURST,
.period_bytes_max = UINT_MAX,
.periods_min = 2,
.periods_max = UINT_MAX,
@ -227,17 +227,17 @@ int axg_fifo_pcm_open(struct snd_soc_component *component,
/*
* Make sure the buffer and period size are multiple of the FIFO
* minimum depth size
* burst
*/
ret = snd_pcm_hw_constraint_step(ss->runtime, 0,
SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
AXG_FIFO_MIN_DEPTH);
AXG_FIFO_BURST);
if (ret)
return ret;
ret = snd_pcm_hw_constraint_step(ss->runtime, 0,
SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
AXG_FIFO_MIN_DEPTH);
AXG_FIFO_BURST);
if (ret)
return ret;

2
sound/soc/meson/axg-fifo.h
View file

@ -31,8 +31,6 @@ struct snd_soc_pcm_runtime;
SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE)
#define AXG_FIFO_BURST 8
#define AXG_FIFO_MIN_CNT 64
#define AXG_FIFO_MIN_DEPTH (AXG_FIFO_BURST * AXG_FIFO_MIN_CNT)
#define FIFO_INT_ADDR_FINISH BIT(0)
#define FIFO_INT_ADDR_INT BIT(1)