[PATCH V2] ASoC: fsl_esai: Support synchronous mode

[S.j. Wang]

Hi

> 
> This looks better :)
> 
> On Wed, Apr 03, 2019 at 10:07:40AM +0000, S.j. Wang wrote:
> > @@ -218,7 +218,7 @@ static int fsl_esai_set_dai_sysclk(struct
> > snd_soc_dai *dai, int clk_id,  {
> >  	struct fsl_esai *esai_priv = snd_soc_dai_get_drvdata(dai);
> >  	struct clk *clksrc = esai_priv->extalclk;
> > -	bool tx = clk_id <= ESAI_HCKT_EXTAL;
> > +	bool tx = (clk_id <= ESAI_HCKT_EXTAL || esai_priv->synchronous);
> >  	bool in = dir == SND_SOC_CLOCK_IN;
> >  	u32 ratio, ecr = 0;
> >  	unsigned long clk_rate;
> > @@ -253,7 +253,7 @@ static int fsl_esai_set_dai_sysclk(struct
> snd_soc_dai *dai, int clk_id,
> >  		ecr |= ESAI_ECR_ETI;
> >  		/* fall through */
> 
> Btw, I am also wondering if the fall through here is a bug....
> Because I don't recall that there is a specific reason to fall through here.
> Can you please help confirm? Perhaps we need to submit a separate fix as
> well by replacing it with a "break;".
Yes, I think there is issue here, will submit another patch for it.
> 
> >  	case ESAI_HCKR_EXTAL:
> > -		ecr |= ESAI_ECR_ERI;
> > +		ecr |= esai_priv->synchronous ? ESAI_ECR_ETI :
> ESAI_ECR_ERI;
> >  		break;
> >  	default:
> >  		return -EINVAL;
> 
> > @@ -537,10 +537,18 @@ static int fsl_esai_hw_params(struct
> > snd_pcm_substream *substream,
> >
> >  	bclk = params_rate(params) * slot_width * esai_priv->slots;
> >
> > -	ret = fsl_esai_set_bclk(dai, tx, bclk);
> > +	ret = fsl_esai_set_bclk(dai, esai_priv->synchronous || tx, bclk);
> >  	if (ret)
> >  		return ret;
> >
> > +	mask = ESAI_xCR_xSWS_MASK;
> > +	val = ESAI_xCR_xSWS(slot_width, width);
> > +
> > +	regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx), mask,
> val);
> > +	/* Recording in synchronous mode needs to set TCR also */
> > +	if (!tx && esai_priv->synchronous)
> > +		regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR,
> mask, val);
> > +
> >  	/* Use Normal mode to support monaural audio */
> >  	regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx),
> >  			   ESAI_xCR_xMOD_MASK,
> params_channels(params) > 1 ?
> > @@ -556,10 +564,9 @@ static int fsl_esai_hw_params(struct
> > snd_pcm_substream *substream,
> >
> >  	regmap_update_bits(esai_priv->regmap, REG_ESAI_xFCR(tx), mask,
> val);
> >
> > -	mask = ESAI_xCR_xSWS_MASK | (tx ? ESAI_xCR_PADC : 0);
> > -	val = ESAI_xCR_xSWS(slot_width, width) | (tx ? ESAI_xCR_PADC : 0);
> > -
> > -	regmap_update_bits(esai_priv->regmap, REG_ESAI_xCR(tx), mask,
> val);
> > +	if (tx)
> > +		regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR,
> > +					ESAI_xCR_PADC, ESAI_xCR_PADC);
> 
> Mind aligning the indentation here like the one below?
> 		regmap_update_bits(esai_priv->regmap, REG_ESAI_TCR,
> 				   ESAI_xCR_PADC, ESAI_xCR_PADC);

Ok. Will send v3.
> 
> Once you fix the indentation, add this:
> 
> Acked-by: Nicolin Chen <nicoleotsuka at gmail.com>
> 
> Thanks