From 66881d14d63771e79c0fbd5ad931266f3b8e5b2b Mon Sep 17 00:00:00 2001
From: Shengjiu Wang <shengjiu.wang@nxp.com>
Date: Tue, 17 May 2022 21:11:15 +0800
Subject: [PATCH] LF-6072: ASoC: imx-card: Assign clock rate for PDM format
Previously we only assigned clock rate for 44kHz series sample rate.
But meet issue on i.MX8MM 16KHz case, the calculated mclk_freq is
512KHz, but because root clock divider range limitation, the smallest
mclk rate is 768Hkz, then cause issue. so also assign mclk_freq
for 48kHz series sample rates
Fixes: 3a650ee65b73 ("LF-5909-2: ASoC: imx-card: fix DSD mclk frequency")
Signed-off-by: Shengjiu Wang <shengjiu.wang@nxp.com>
Reviewed-by: Chancel Liu <chancel.liu@nxp.com>
Acked-by: Jason Liu <jason.hui.liu@nxp.com>
---
sound/soc/fsl/imx-card.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff --git a/sound/soc/fsl/imx-card.c b/sound/soc/fsl/imx-card.c
index be9c2c911b773..70b3b7819868d 100644
--- a/sound/soc/fsl/imx-card.c
+++ b/sound/soc/fsl/imx-card.c
@@ -354,8 +354,12 @@ static int imx_aif_hw_params(struct snd_pcm_substream *substream,
else
mclk_freq = params_rate(params) * slots * slot_width;
/* Use the maximum freq from DSD512 (512*44100 = 22579200) */
- if (format_is_dsd(params) && (params_rate(params) % 44100 == 0))
- mclk_freq = 22579200;
+ if (format_is_dsd(params)) {
+ if (params_rate(params) % 11025 == 0)
+ mclk_freq = 22579200;
+ else
+ mclk_freq = 24576000;
+ }
ret = snd_soc_dai_set_sysclk(cpu_dai, link_data->cpu_sysclk_id, mclk_freq,
SND_SOC_CLOCK_OUT);
--
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