linux-kernel - Re: [PATCH RFC 6/7] ASoC: tlv320aic26: Add support for DSP

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Date:	Mon, 21 Sep 2015 09:05:57 -0400
From:	Jon Cormier <jcormier@...ticallink.com>
To:	Peter Ujfalusi <peter.ujfalusi@...com>
Cc:	Liam Girdwood <lgirdwood@...il.com>,
	Bob Duke <bduke@...ticallink.com>,
	Mike Williamson <michael.williamson@...ticallink.com>,
	Mark Brown <broonie@...aro.org>,
	Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>, Jyri Sarha <jsarha@...com>,
	Misael Lopez Cruz <misael.lopez@...com>,
	alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
	Greg Gluszek <greg.gluszek@...ticallink.com>
Subject: Re: [PATCH RFC 6/7] ASoC: tlv320aic26: Add support for DSP_B data format

On Mon, Sep 21, 2015 at 2:19 AM, Peter Ujfalusi <peter.ujfalusi@...com> wrote:
>
> On 09/18/2015 11:11 PM, Cormier, Jonathan wrote:
> > Signed-off-by: Cormier, Jonathan <jcormier@...ticallink.com>
> > ---
> >  sound/soc/codecs/tlv320aic26.c | 1 +
> >  1 file changed, 1 insertion(+)
> >
> > diff --git a/sound/soc/codecs/tlv320aic26.c b/sound/soc/codecs/tlv320aic26.c
> > index c3b0a698ea66..5c5641cd28de 100644
> > --- a/sound/soc/codecs/tlv320aic26.c
> > +++ b/sound/soc/codecs/tlv320aic26.c
> > @@ -211,6 +211,7 @@ static int aic26_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
> >       switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
> >       case SND_SOC_DAIFMT_I2S:     aic26->datfm = AIC26_DATFM_I2S; break;
> >       case SND_SOC_DAIFMT_DSP_A:   aic26->datfm = AIC26_DATFM_DSP; break;
> > +     case SND_SOC_DAIFMT_DSP_B:   aic26->datfm = AIC26_DATFM_DSP; break;
>
> Are you sure about this? According to the datasheet:
> www.ti.com/litv/slas412 page 18 there is no bit to change the data delay and
> the format the codec supports is DSP_A.
I went with DSP_B because thats what the 335x EVM had set and when
comparing the tlv320aic26 datasheet to the tlv320aic32 for the DSP
mode it seemed to match. I had been getting garbled audio playback
when I tested with DSP_A but I just retested to be sure and now DSP_A
appears to work just the same as DSP_B.  So I suggest we drop this
patch.
>
> >       case SND_SOC_DAIFMT_RIGHT_J: aic26->datfm = AIC26_DATFM_RIGHTJ; break;
> >       case SND_SOC_DAIFMT_LEFT_J:  aic26->datfm = AIC26_DATFM_LEFTJ; break;
> >       default:
> >
>
>
> --
> Péter


-- 
Jonathan Cormier
CriticalLink
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