linux-kernel - Re: [alsa-devel] [PATCH] ASoC: tlv320aic3x: Add support for high power analog output

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <507b9ee8-2505-8014-114e-563dc5995e8f@ti.com>
Date:   Mon, 29 Apr 2019 14:27:15 +0300
From:   Peter Ujfalusi <peter.ujfalusi@...com>
To:     Saravanan Sekar <sravanhome@...il.com>, <lgirdwood@...il.com>,
        <broonie@...nel.org>, <perex@...ex.cz>, <tiwai@...e.com>,
        <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [alsa-devel] [PATCH] ASoC: tlv320aic3x: Add support for high
 power analog output

Hi,

On 27/04/2019 22.40, Saravanan Sekar wrote:
> Add support to power and output level control for the analog high power
> output drivers HPOUT and HPCOM.
> 
> Signed-off-by: Saravanan Sekar <sravanhome@...il.com>
> ---
>  sound/soc/codecs/tlv320aic3x.c | 6 ++++++
>  1 file changed, 6 insertions(+)
> 
> diff --git a/sound/soc/codecs/tlv320aic3x.c b/sound/soc/codecs/tlv320aic3x.c
> index 516d17cb2182..d4bafac802eb 100644
> --- a/sound/soc/codecs/tlv320aic3x.c
> +++ b/sound/soc/codecs/tlv320aic3x.c
> @@ -419,6 +419,12 @@ static const struct snd_kcontrol_new aic3x_snd_controls[] = {
>  	/* Pop reduction */
>  	SOC_ENUM("Output Driver Power-On time", aic3x_poweron_time_enum),
>  	SOC_ENUM("Output Driver Ramp-up step", aic3x_rampup_step_enum),
> +
> +	/* Analog HPOUT, HPCOM power and output level controls */
> +	SOC_DOUBLE_R("Analog output power control", HPROUT_CTRL,
> +			HPRCOM_CTRL, 0, 1, 0),

bit 0 of HPROUT_CTRL and HPRCOM_CTRL is handled by DAPM:
"Right HP Out"
"Right HP Com"

> +	SOC_DOUBLE_R("Analog output level control", HPROUT_CTRL,
> +			HPRCOM_CTRL, 4, 9, 0),

and this will modify the HPR and HPRCOM (right channels) only.

You should add two controls:

/* HP/HPCOM volumes. From 0 to 9 dB in 1 dB steps */
static DECLARE_TLV_DB_SCALE(hp_tlv, 0, 100, 0);

SOC_DOUBLE_R_TLV("HP Playback Volume", HPLOUT_CTRL, HPROUT_CTRL, 4, 9,
0, hp_tlv);

SOC_DOUBLE_R_TLV("HPCOM Playback Volume", HPLCOM_CTRL, HPRCOM_CTRL, 4,
9, 0, hp_tlv);


>  };
>  
>  /* For other than tlv320aic3104 */
> 

- Péter

Texas Instruments Finland Oy, Porkkalankatu 22, 00180 Helsinki.
Y-tunnus/Business ID: 0615521-4. Kotipaikka/Domicile: Helsinki