From: Zidan Wang Date: Mon, 9 Nov 2015 11:03:13 +0000 (+0800) Subject: ASoC: fsl-sai: set xCR4/xCR5/xMR for SAI master mode X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=51659ca069ce5bdf20675a7967a39ef8419e87f2;p=deliverable%2Flinux.git ASoC: fsl-sai: set xCR4/xCR5/xMR for SAI master mode For SAI master mode, when Tx(Rx) sync with Rx(Tx) clock, Rx(Tx) will generate bclk and frame clock for Tx(Rx), we should set RCR4(TCR4), RCR5(TCR5) and RMR(TMR) for playback(capture), or there will be sync error sometimes. Signed-off-by: Zidan Wang Acked-by: Nicolin Chen Signed-off-by: Mark Brown --- diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c index 7e421a97c090..520dbadaa8b1 100644 --- a/sound/soc/fsl/fsl_sai.c +++ b/sound/soc/fsl/fsl_sai.c @@ -427,6 +427,35 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream, val_cr4 |= FSL_SAI_CR4_FRSZ(channels); + /* + * For SAI master mode, when Tx(Rx) sync with Rx(Tx) clock, Rx(Tx) will + * generate bclk and frame clock for Tx(Rx), we should set RCR4(TCR4), + * RCR5(TCR5) and RMR(TMR) for playback(capture), or there will be sync + * error. + */ + + if (!sai->is_slave_mode) { + if (!sai->synchronous[TX] && sai->synchronous[RX] && !tx) { + regmap_update_bits(sai->regmap, FSL_SAI_TCR4, + FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK, + val_cr4); + regmap_update_bits(sai->regmap, FSL_SAI_TCR5, + FSL_SAI_CR5_WNW_MASK | FSL_SAI_CR5_W0W_MASK | + FSL_SAI_CR5_FBT_MASK, val_cr5); + regmap_write(sai->regmap, FSL_SAI_TMR, + ~0UL - ((1 << channels) - 1)); + } else if (!sai->synchronous[RX] && sai->synchronous[TX] && tx) { + regmap_update_bits(sai->regmap, FSL_SAI_RCR4, + FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK, + val_cr4); + regmap_update_bits(sai->regmap, FSL_SAI_RCR5, + FSL_SAI_CR5_WNW_MASK | FSL_SAI_CR5_W0W_MASK | + FSL_SAI_CR5_FBT_MASK, val_cr5); + regmap_write(sai->regmap, FSL_SAI_RMR, + ~0UL - ((1 << channels) - 1)); + } + } + regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx), FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK, val_cr4);