OERV-BSP/kernel-spacemit-k1
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i2s: adjust the sysclk divider parameters

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The old parameters may cause jitter in sysclk.

Change-Id: Ia64dda7e35ae56090a7d27ad8ab972d3f8ba8280
Signed-off-by: weijinmei <jinmei.wei@spacemit.com>
This commit is contained in:
weijinmei
2025-07-16 17:34:52 +08:00
committed by 张猛
parent 71908afd85
commit 14d1b98300
1 changed files with 18 additions and 8 deletions
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26
sound/soc/spacemit/spacemit-snd-i2s.c
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@@ -52,6 +52,8 @@
#define BITCLK_DIV_468 (0x0 << 27)
#define FRAME_48K_I2S (0x4 << 15)
#define SYSCLK_PRE_CTRL 0x08
/*
* ssp:sspa audio private data
*/
@@ -299,16 +301,16 @@ static int i2s_sspa_hw_params(struct snd_pcm_substream *substream,
sspa_priv->mclk_fs = sspa_priv->sysclk / (params_rate(params));
switch (sspa_priv->mclk_fs) {
case 64:
target = SYSCLK_BASE_156M | 4 << 15 | 200; //64fs
target = SYSCLK_BASE_156M | 326 << 15 | 32600; //64fs
break;
case 128:
target = SYSCLK_BASE_156M | 8 << 15 | 200; //128fs
target = SYSCLK_BASE_156M | 652 << 15 | 32600; //128fs
break;
case 256:
target = SYSCLK_BASE_156M | 16 << 15 | 200; //256fs
target = SYSCLK_BASE_156M | 1304 << 15 | 32600; //256fs
break;
default:
target = SYSCLK_BASE_156M | 16 << 15 | 200; //256fs
target = SYSCLK_BASE_156M | 1304 << 15 | 32600; //256fs
break;
}
@@ -333,6 +335,10 @@ static int i2s_sspa_hw_params(struct snd_pcm_substream *substream,
val = __raw_readl(sspa->pmumain + ISCCR1);
val = val & ~0x5FFFFFFF;
__raw_writel(val | target, sspa->pmumain + ISCCR1);
val = __raw_readl(sspa->pmumain + SYSCLK_PRE_CTRL);
val |= 1 << 29;
__raw_writel(val, sspa->pmumain + SYSCLK_PRE_CTRL);
return 0;
}
@@ -479,22 +485,26 @@ static void i2s_sspa_init(struct sspa_priv *priv)
switch (priv->mclk_fs) {
case 64:
target = SYSCLK_BASE_156M | 0 << 27| 4 << 15 | 200; //64fs
target = SYSCLK_BASE_156M | 0 << 27 | 326 << 15 | 32600; //64fs
break;
case 128:
target = SYSCLK_BASE_156M | 1 << 27| 8 << 15 | 200; //128fs
target = SYSCLK_BASE_156M | 1 << 27 | 652 << 15 | 32600; //128fs
break;
case 256:
target = SYSCLK_BASE_156M | 3 << 27| 16 << 15 | 200; //256fs
target = SYSCLK_BASE_156M | 3 << 27 | 1304 << 15 | 32600; //256fs
break;
default:
target = SYSCLK_BASE_156M | 3 << 27| 16 << 15 | 200; //256fs
target = SYSCLK_BASE_156M | 3 << 27 | 1304 << 15 | 32600; //256fs
break;
}
val = __raw_readl(sspa->pmumain + ISCCR1);
val = val & ~0x5FFFFFFF;
__raw_writel(val | target, sspa->pmumain + ISCCR1);
val = __raw_readl(sspa->pmumain + SYSCLK_PRE_CTRL);
val |= 1 << 29;
__raw_writel(val, sspa->pmumain + SYSCLK_PRE_CTRL);
}
static int i2s_sspa_suspend(struct device *dev)