On Thu, Sep 03, 2020 at 11:09:15AM +0800, Shengjiu Wang wrote: > Transmit data pins will output zero when slots are masked or channels > are disabled. In CHMOD TDM mode, transmit data pins are tri-stated when > slots are masked or channels are disabled. When data pins are tri-stated, > there is noise on some channels when FS clock value is high and data is > read while fsclk is transitioning from high to low. > > Signed-off-by: Cosmin-Gabriel Samoila <cosmin.samoila@xxxxxxx> > Signed-off-by: Shengjiu Wang <shengjiu.wang@xxxxxxx> Acked-by: Nicolin Chen <nicoleotsuka@xxxxxxxxx> Though one nit inline: > --- > sound/soc/fsl/fsl_sai.c | 12 ++++++++++-- > sound/soc/fsl/fsl_sai.h | 2 ++ > 2 files changed, 12 insertions(+), 2 deletions(-) > > diff --git a/sound/soc/fsl/fsl_sai.c b/sound/soc/fsl/fsl_sai.c > index 62c5fdb678fc..33b194a5c1dc 100644 > --- a/sound/soc/fsl/fsl_sai.c > +++ b/sound/soc/fsl/fsl_sai.c > @@ -486,6 +486,12 @@ static int fsl_sai_hw_params(struct snd_pcm_substream *substream, > > val_cr4 |= FSL_SAI_CR4_FRSZ(slots); > > + /* Output Mode - data pins transmit 0 when slots are masked > + * or channels are disabled > + */ Coding style for multi-line comments. Yet, probably can simplify? /* Set to output mode to avoid tri-stated data pins */
