From 42b5ac832b0c3bf5b0bf98ea6d99efa5fb5d5075 Mon Sep 17 00:00:00 2001
From: Jerome Brunet <jbrunet@baylibre.com>
Date: Wed, 18 Dec 2019 18:24:20 +0100
Subject: [PATCH] ASoC: meson: axg-fifo: relax period size constraints
Git-commit: 42b5ac832b0c3bf5b0bf98ea6d99efa5fb5d5075
Patch-mainline: v5.6-rc1
References: jsc#SLE-16518
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>
Acked-by: Takashi Iwai <tiwai@suse.de>
---
sound/soc/meson/axg-fifo.c | 8 ++++----
sound/soc/meson/axg-fifo.h | 2 --
2 files changed, 4 insertions(+), 6 deletions(-)
diff --git a/sound/soc/meson/axg-fifo.c b/sound/soc/meson/axg-fifo.c
index c2742a02d866..c12b0d5e8ebf 100644
--- a/sound/soc/meson/axg-fifo.c
+++ b/sound/soc/meson/axg-fifo.c
@@ -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;
diff --git a/sound/soc/meson/axg-fifo.h b/sound/soc/meson/axg-fifo.h
index 521b54e98fd3..b63acd723c87 100644
--- a/sound/soc/meson/axg-fifo.h
+++ b/sound/soc/meson/axg-fifo.h
@@ -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)
--
2.16.4