From 197c53c8ecb34f2cd5922f4bdcffa8f701a134eb Mon Sep 17 00:00:00 2001 From: Shengjiu Wang Date: Tue, 19 Sep 2023 17:42:13 +0800 Subject: [PATCH] ASoC: fsl_sai: Don't disable bitclock for i.MX8MP On i.MX8MP, the BCE and TERE bit are binding with mclk enablement, if BCE and TERE are cleared the MCLK also be disabled on output pin, that cause the external codec (wm8960) in wrong state. Codec (wm8960) is using the mclk to generate PLL clock, if mclk is disabled before disabling PLL, the codec (wm8960) won't generate bclk and frameclk when sysclk switch to MCLK source in next test case. The test case: $aplay -r44100 test1.wav (PLL source) $aplay -r48000 test2.wav (MCLK source) aplay: pcm_write:2127: write error: Input/output error Fixes: 269f399dc19f ("ASoC: fsl_sai: Disable bit clock with transmitter") Signed-off-by: Shengjiu Wang Link: https://lore.kernel.org/r/1695116533-23287-1-git-send-email-shengjiu.wang@nxp.com Signed-off-by: Mark Brown --- sound/soc/fsl/fsl_sai.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c index 1e4020fae05a..8a9a30dd31e2 100644 --- a/sound/soc/fsl/fsl_sai.c +++ b/sound/soc/fsl/fsl_sai.c @@ -710,10 +710,15 @@ static void fsl_sai_config_disable(struct fsl_sai *sai, int dir) { unsigned int ofs = sai->soc_data->reg_offset; bool tx = dir == TX; - u32 xcsr, count = 100; + u32 xcsr, count = 100, mask; + + if (sai->soc_data->mclk_with_tere && sai->mclk_direction_output) + mask = FSL_SAI_CSR_TERE; + else + mask = FSL_SAI_CSR_TERE | FSL_SAI_CSR_BCE; regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs), - FSL_SAI_CSR_TERE | FSL_SAI_CSR_BCE, 0); + mask, 0); /* TERE will remain set till the end of current frame */ do {