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ASoC: fsl_sai: Reset FIFOs after disabling TE/RE

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SAI will not clear their FIFOs after disabling TE/RE. Therfore, the driver
should take care the task so as not to let useless data remain in the FIFO.

Signed-off-by: Nicolin Chen <nicoleotsuka@gmail.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
This commit is contained in:
Nicolin Chen 2014-07-17 21:21:37 +08:00 committed by Mark Brown
parent 7171511eae
commit eff952b733
1 changed files with 5 additions and 2 deletions
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7
sound/soc/fsl/fsl_sai.c
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@ -371,10 +371,13 @@ static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd,
/* Check if the opposite FRDE is also disabled */ /* Check if the opposite FRDE is also disabled */
if (!(tx ? rcsr & FSL_SAI_CSR_FRDE : tcsr & FSL_SAI_CSR_FRDE)) { if (!(tx ? rcsr & FSL_SAI_CSR_FRDE : tcsr & FSL_SAI_CSR_FRDE)) {
/* Disable both directions and reset their FIFOs */
regmap_update_bits(sai->regmap, FSL_SAI_TCSR, regmap_update_bits(sai->regmap, FSL_SAI_TCSR,
FSL_SAI_CSR_TERE, 0); FSL_SAI_CSR_TERE | FSL_SAI_CSR_FR,
FSL_SAI_CSR_FR);
regmap_update_bits(sai->regmap, FSL_SAI_RCSR, regmap_update_bits(sai->regmap, FSL_SAI_RCSR,
FSL_SAI_CSR_TERE, 0); FSL_SAI_CSR_TERE | FSL_SAI_CSR_FR,
FSL_SAI_CSR_FR);
} }
break; break;
default: default: