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[RFC] ASoC: fsl-ssi: Add support for CBM_CFS 16/24 bit

Message ID 1406551598-14740-1-git-send-email-michael@amarulasolutions.com (mailing list archive)
State New, archived
Headers show

Commit Message

Michael Nazzareno Trimarchi July 28, 2014, 12:46 p.m. UTC 
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
---
 sound/soc/fsl/fsl_ssi.c | 27 +++++++++++++++++++++++++--
 1 file changed, 25 insertions(+), 2 deletions(-)

Comments

Markus Pargmann July 29, 2014, 6:18 a.m. UTC | #1 
Hi,

On Mon, Jul 28, 2014 at 02:46:38PM +0200, Michael Trimarchi wrote:
> Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>

A commit description what you are doing in this patch and how your setup
looks like would be good.

> ---
>  sound/soc/fsl/fsl_ssi.c | 27 +++++++++++++++++++++++++--
>  1 file changed, 25 insertions(+), 2 deletions(-)
> 
> diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
> index 9bfef55..743e50d 100644
> --- a/sound/soc/fsl/fsl_ssi.c
> +++ b/sound/soc/fsl/fsl_ssi.c
> @@ -724,10 +724,19 @@ static int fsl_ssi_hw_params(struct snd_pcm_substream *substream,
>  		regmap_update_bits(regs, CCSR_SSI_SRCCR, CCSR_SSI_SxCCR_WL_MASK,
>  				wl);
>  
> -	if (!fsl_ssi_is_ac97(ssi_private))
> +	if (!fsl_ssi_is_ac97(ssi_private)) {
> +		u8 i2smode;
> +
> +		if (ssi_private->i2s_mode == (CCSR_SSI_SCR_I2S_MODE_NORMAL |
> +		    CCSR_SSI_SCR_NET) && sample_size >= 24)

This condition seems a bit fragile using the i2s_mode variable.

I don't know about this bitclock master mode, why is this condition
necessary, what is the difference with sample_size >= 24?

Regards,

Markus

> +			i2smode = CCSR_SSI_SCR_I2S_MODE_MASTER;
> +		else
> +			i2smode = ssi_private->i2s_mode;
> +
>  		regmap_update_bits(regs, CCSR_SSI_SCR,
>  				CCSR_SSI_SCR_NET | CCSR_SSI_SCR_I2S_MODE_MASK,
> -				channels == 1 ? 0 : ssi_private->i2s_mode);
> +				channels == 1 ? 0 : i2smode);
> +	}
>  
>  	return 0;
>  }
> @@ -789,6 +798,15 @@ static int _fsl_ssi_set_dai_fmt(struct fsl_ssi_private *ssi_private,
>  					CCSR_SSI_SxCCR_DC_MASK,
>  					CCSR_SSI_SxCCR_DC(2));
>  			break;
> +		case SND_SOC_DAIFMT_CBM_CFS:
> +			ssi_private->i2s_mode |= CCSR_SSI_SCR_I2S_MODE_NORMAL;
> +			regmap_update_bits(regs, CCSR_SSI_STCCR,
> +					CCSR_SSI_SxCCR_DC_MASK,
> +					CCSR_SSI_SxCCR_DC(2));
> +			regmap_update_bits(regs, CCSR_SSI_SRCCR,
> +					CCSR_SSI_SxCCR_DC_MASK,
> +					CCSR_SSI_SxCCR_DC(2));
> +			break;
>  		case SND_SOC_DAIFMT_CBM_CFM:
>  			ssi_private->i2s_mode |= CCSR_SSI_SCR_I2S_MODE_SLAVE;
>  			break;
> @@ -853,6 +871,11 @@ static int _fsl_ssi_set_dai_fmt(struct fsl_ssi_private *ssi_private,
>  	case SND_SOC_DAIFMT_CBM_CFM:
>  		scr &= ~CCSR_SSI_SCR_SYS_CLK_EN;
>  		break;
> +	case SND_SOC_DAIFMT_CBM_CFS:
> +		strcr &= ~CCSR_SSI_STCR_TXDIR;
> +		strcr |= CCSR_SSI_STCR_TFDIR;
> +		scr &= ~CCSR_SSI_SCR_SYS_CLK_EN;
> +		break;
>  	default:
>  		return -EINVAL;
>  	}
> -- 
> 1.8.1.2
> 
>
Michael Nazzareno Trimarchi July 31, 2014, 5:09 a.m. UTC | #2 
Hi

Il 29/lug/2014 08:18 "Markus Pargmann" <mpa@pengutronix.de> ha scritto:
>
> Hi,
>
> On Mon, Jul 28, 2014 at 02:46:38PM +0200, Michael Trimarchi wrote:
> > Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
>
> A commit description what you are doing in this patch and how your setup
> looks like would be good.
>
> > ---
> >  sound/soc/fsl/fsl_ssi.c | 27 +++++++++++++++++++++++++--
> >  1 file changed, 25 insertions(+), 2 deletions(-)
> >
> > diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
> > index 9bfef55..743e50d 100644
> > --- a/sound/soc/fsl/fsl_ssi.c
> > +++ b/sound/soc/fsl/fsl_ssi.c
> > @@ -724,10 +724,19 @@ static int fsl_ssi_hw_params(struct
snd_pcm_substream *substream,
> >               regmap_update_bits(regs, CCSR_SSI_SRCCR,
CCSR_SSI_SxCCR_WL_MASK,
> >                               wl);
> >
> > -     if (!fsl_ssi_is_ac97(ssi_private))
> > +     if (!fsl_ssi_is_ac97(ssi_private)) {
> > +             u8 i2smode;
> > +
> > +             if (ssi_private->i2s_mode ==
(CCSR_SSI_SCR_I2S_MODE_NORMAL |
> > +                 CCSR_SSI_SCR_NET) && sample_size >= 24)
>
> This condition seems a bit fragile using the i2s_mode variable.
>
> I don't know about this bitclock master mode, why is this condition
> necessary, what is the difference with sample_size >= 24?
>

I will do in better way and cleanup. Problem is how data is packed in 32
bit sample. So 24/32 should be master but 16/32 seems a different story. It
packs like 16/16 bit.

I will take a look during the weekend

Michael

> Regards,
>
> Markus
>
> > +                     i2smode = CCSR_SSI_SCR_I2S_MODE_MASTER;
> > +             else
> > +                     i2smode = ssi_private->i2s_mode;
> > +
> >               regmap_update_bits(regs, CCSR_SSI_SCR,
> >                               CCSR_SSI_SCR_NET |
CCSR_SSI_SCR_I2S_MODE_MASK,
> > -                             channels == 1 ? 0 :
ssi_private->i2s_mode);
> > +                             channels == 1 ? 0 : i2smode);
> > +     }
> >
> >       return 0;
> >  }
> > @@ -789,6 +798,15 @@ static int _fsl_ssi_set_dai_fmt(struct
fsl_ssi_private *ssi_private,
> >                                       CCSR_SSI_SxCCR_DC_MASK,
> >                                       CCSR_SSI_SxCCR_DC(2));
> >                       break;
> > +             case SND_SOC_DAIFMT_CBM_CFS:
> > +                     ssi_private->i2s_mode |=
CCSR_SSI_SCR_I2S_MODE_NORMAL;
> > +                     regmap_update_bits(regs, CCSR_SSI_STCCR,
> > +                                     CCSR_SSI_SxCCR_DC_MASK,
> > +                                     CCSR_SSI_SxCCR_DC(2));
> > +                     regmap_update_bits(regs, CCSR_SSI_SRCCR,
> > +                                     CCSR_SSI_SxCCR_DC_MASK,
> > +                                     CCSR_SSI_SxCCR_DC(2));
> > +                     break;
> >               case SND_SOC_DAIFMT_CBM_CFM:
> >                       ssi_private->i2s_mode |=
CCSR_SSI_SCR_I2S_MODE_SLAVE;
> >                       break;
> > @@ -853,6 +871,11 @@ static int _fsl_ssi_set_dai_fmt(struct
fsl_ssi_private *ssi_private,
> >       case SND_SOC_DAIFMT_CBM_CFM:
> >               scr &= ~CCSR_SSI_SCR_SYS_CLK_EN;
> >               break;
> > +     case SND_SOC_DAIFMT_CBM_CFS:
> > +             strcr &= ~CCSR_SSI_STCR_TXDIR;
> > +             strcr |= CCSR_SSI_STCR_TFDIR;
> > +             scr &= ~CCSR_SSI_SCR_SYS_CLK_EN;
> > +             break;
> >       default:
> >               return -EINVAL;
> >       }
> > --
> > 1.8.1.2
> >
> >
>
> --
> Pengutronix e.K.                           |                             |
> Industrial Linux Solutions                 |http://www.pengutronix.de/ |
> Peiner Str. 6-8, 31137 Hildesheim, Germany | Phone:+49-5121-206917-0   |
> Amtsgericht Hildesheim, HRA 2686           | Fax:  +49-5121-206917-5555|
diff mbox

Patch

diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c
index 9bfef55..743e50d 100644
--- a/sound/soc/fsl/fsl_ssi.c
+++ b/sound/soc/fsl/fsl_ssi.c
@@ -724,10 +724,19 @@  static int fsl_ssi_hw_params(struct snd_pcm_substream *substream,
 		regmap_update_bits(regs, CCSR_SSI_SRCCR, CCSR_SSI_SxCCR_WL_MASK,
 				wl);
 
-	if (!fsl_ssi_is_ac97(ssi_private))
+	if (!fsl_ssi_is_ac97(ssi_private)) {
+		u8 i2smode;
+
+		if (ssi_private->i2s_mode == (CCSR_SSI_SCR_I2S_MODE_NORMAL |
+		    CCSR_SSI_SCR_NET) && sample_size >= 24)
+			i2smode = CCSR_SSI_SCR_I2S_MODE_MASTER;
+		else
+			i2smode = ssi_private->i2s_mode;
+
 		regmap_update_bits(regs, CCSR_SSI_SCR,
 				CCSR_SSI_SCR_NET | CCSR_SSI_SCR_I2S_MODE_MASK,
-				channels == 1 ? 0 : ssi_private->i2s_mode);
+				channels == 1 ? 0 : i2smode);
+	}
 
 	return 0;
 }
@@ -789,6 +798,15 @@  static int _fsl_ssi_set_dai_fmt(struct fsl_ssi_private *ssi_private,
 					CCSR_SSI_SxCCR_DC_MASK,
 					CCSR_SSI_SxCCR_DC(2));
 			break;
+		case SND_SOC_DAIFMT_CBM_CFS:
+			ssi_private->i2s_mode |= CCSR_SSI_SCR_I2S_MODE_NORMAL;
+			regmap_update_bits(regs, CCSR_SSI_STCCR,
+					CCSR_SSI_SxCCR_DC_MASK,
+					CCSR_SSI_SxCCR_DC(2));
+			regmap_update_bits(regs, CCSR_SSI_SRCCR,
+					CCSR_SSI_SxCCR_DC_MASK,
+					CCSR_SSI_SxCCR_DC(2));
+			break;
 		case SND_SOC_DAIFMT_CBM_CFM:
 			ssi_private->i2s_mode |= CCSR_SSI_SCR_I2S_MODE_SLAVE;
 			break;
@@ -853,6 +871,11 @@  static int _fsl_ssi_set_dai_fmt(struct fsl_ssi_private *ssi_private,
 	case SND_SOC_DAIFMT_CBM_CFM:
 		scr &= ~CCSR_SSI_SCR_SYS_CLK_EN;
 		break;
+	case SND_SOC_DAIFMT_CBM_CFS:
+		strcr &= ~CCSR_SSI_STCR_TXDIR;
+		strcr |= CCSR_SSI_STCR_TFDIR;
+		scr &= ~CCSR_SSI_SCR_SYS_CLK_EN;
+		break;
 	default:
 		return -EINVAL;
 	}