linux-kernel - RE: [EXT] Re: [PATCH] ASoC: sgtl5000: Revert "ASoC: sgtl5000: Fix of unmute outputs on probe"

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Date:   Thu, 12 Dec 2019 09:24:42 +0000
From:   Alison Wang <alison.wang@....com>
To:     Oleksandr Suvorov <oleksandr.suvorov@...adex.com>
CC:     Marcel Ziswiler <marcel.ziswiler@...adex.com>,
        Igor Opaniuk <igor.opaniuk@...adex.com>,
        "festevam@...il.com" <festevam@...il.com>,
        "broonie@...nel.org" <broonie@...nel.org>,
        "lgirdwood@...il.com" <lgirdwood@...il.com>,
        "alsa-devel@...a-project.org" <alsa-devel@...a-project.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: RE: [EXT] Re: [PATCH] ASoC: sgtl5000: Revert "ASoC: sgtl5000: Fix of
 unmute outputs on probe"

Hi, Oleksandr,

I think I have explained the reason in my email which sent to you yesterday. I attached it too.
According to my test on the boards, MUTE_LO, MUTE_HP and MUTE_ADC are all muted when
playing the sound.

Could you give me some ideas about this issue?


Best Regards,I 
Alison Wang


> -----Original Message-----
> From: Oleksandr Suvorov <oleksandr.suvorov@...adex.com>
> Sent: Thursday, December 12, 2019 5:11 PM
> To: Alison Wang <alison.wang@....com>
> Cc: Marcel Ziswiler <marcel.ziswiler@...adex.com>; Igor Opaniuk
> <igor.opaniuk@...adex.com>; festevam@...il.com; broonie@...nel.org;
> lgirdwood@...il.com; Oleksandr Suvorov <oleksandr.suvorov@...adex.com>;
> alsa-devel@...a-project.org; linux-kernel@...r.kernel.org
> Subject: [EXT] Re: [PATCH] ASoC: sgtl5000: Revert "ASoC: sgtl5000: Fix of
> unmute outputs on probe"
> 
> Caution: EXT Email
> 
> Alison, could you please explain, what reason to revert this fix? All these blocks
> have their own control and unmute on demand.
> Why do you stand on unconditional unmuting of outputs and ADC on driver
> probing?
> 
> On Thu, Dec 12, 2019 at 9:20 AM Alison Wang <alison.wang@....com>
> wrote:
> >
> > This reverts commit 631bc8f0134ae9620d86a96b8c5f9445d91a2dca.
> >
> > In commit 631bc8f0134a, snd_soc_component_update_bits is used instead
> > of snd_soc_component_write. Although EN_HP_ZCD and EN_ADC_ZCD are
> > enabled in ANA_CTRL register, MUTE_LO, MUTE_HP and MUTE_ADC bits are
> > remained as the default value. It causes LO, HP and ADC are all muted
> > after driver probe.
> >
> > The patch is to revert this commit, snd_soc_component_write is still
> > used and MUTE_LO, MUTE_HP and MUTE_ADC are set as zero (unmuted).
> >
> > Signed-off-by: Alison Wang <alison.wang@....com>
> > ---
> >  sound/soc/codecs/sgtl5000.c | 6 +++---
> >  1 file changed, 3 insertions(+), 3 deletions(-)
> >
> > diff --git a/sound/soc/codecs/sgtl5000.c b/sound/soc/codecs/sgtl5000.c
> > index aa1f963..0b35fca 100644
> > --- a/sound/soc/codecs/sgtl5000.c
> > +++ b/sound/soc/codecs/sgtl5000.c
> > @@ -1458,7 +1458,6 @@ static int sgtl5000_probe(struct
> snd_soc_component *component)
> >         int ret;
> >         u16 reg;
> >         struct sgtl5000_priv *sgtl5000 =
> snd_soc_component_get_drvdata(component);
> > -       unsigned int zcd_mask = SGTL5000_HP_ZCD_EN |
> SGTL5000_ADC_ZCD_EN;
> >
> >         /* power up sgtl5000 */
> >         ret = sgtl5000_set_power_regs(component);
> > @@ -1486,8 +1485,9 @@ static int sgtl5000_probe(struct
> snd_soc_component *component)
> >                0x1f);
> >         snd_soc_component_write(component,
> SGTL5000_CHIP_PAD_STRENGTH,
> > reg);
> >
> > -       snd_soc_component_update_bits(component,
> SGTL5000_CHIP_ANA_CTRL,
> > -               zcd_mask, zcd_mask);
> > +       snd_soc_component_write(component,
> SGTL5000_CHIP_ANA_CTRL,
> > +                       SGTL5000_HP_ZCD_EN |
> > +                       SGTL5000_ADC_ZCD_EN);
> >
> >         snd_soc_component_update_bits(component,
> SGTL5000_CHIP_MIC_CTRL,
> >                         SGTL5000_BIAS_R_MASK,
> > --
> > 2.9.5
> >
> 
> 
> --
> Best regards
> Oleksandr Suvorov
> 
> Toradex AG
> Altsagenstrasse 5 | 6048 Horw/Luzern | Switzerland | T: +41 41 500
> 4800 (main line)

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