linux-kernel - Re: [PATCH] ASoC: tas2562: Add support for digital volume control

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Message-ID: <de0e8a5b-8c2a-ee04-856f-f0d678a3c66b@ti.com>
Date:   Thu, 20 Feb 2020 12:46:57 -0600
From:   Dan Murphy <dmurphy@...com>
To:     Mark Brown <broonie@...nel.org>
CC:     <lgirdwood@...il.com>, <perex@...ex.cz>, <tiwai@...e.com>,
        <alsa-devel@...a-project.org>, <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] ASoC: tas2562: Add support for digital volume control

Mark

On 2/20/20 12:45 PM, Mark Brown wrote:
> On Thu, Feb 20, 2020 at 11:27:21AM -0600, Dan Murphy wrote:
>
>> +	/* Set the Digital volume to -110dB */
>> +	ret = snd_soc_component_write(component, TAS2562_DVC_CFG4, 0x00);
>> +	if (ret)
>> +		return ret;
>> +	ret = snd_soc_component_write(component, TAS2562_DVC_CFG3, 0x00);
>> +	if (ret)
>> +		return ret;
>> +	ret = snd_soc_component_write(component, TAS2562_DVC_CFG2, 0x0d);
>> +	if (ret)
>> +		return ret;
>> +	ret = snd_soc_component_write(component, TAS2562_DVC_CFG1, 0x43);
>> +	if (ret)
>> +		return ret;
> Is there a reason not to use the chip default here?  Otherwise this
> looks good.

Chip default is set to 0dB full blast+ 0x40400000.  This sets the volume 
to -110dB.

I have the values backwards.  CFG4 should b 0x43 and CFG3 should be 0x0d 
and CFG1&2 should be 0.

I will resend v2 with this fixed.

Dan