From mboxrd@z Thu Jan  1 00:00:00 1970
From: Sergej Sawazki <ce3a@gmx.de>
Subject: Re: ASoC: How to declare volume TLV dB scale?
Date: Sat, 13 Jun 2015 12:45:21 +0200
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To: Clemens Ladisch <clemens@ladisch.de>, Takashi Iwai <tiwai@suse.de>
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On Sat, 13 Jun 2015 12:29:35 +0200, Clemens Ladisch wrote:
> Sergej Sawazki wrote:
>> On Sat, 13 Jun 2015 09:15:49 +0200, Takashi Iwai wrote:

>>> And you need to implement the ctl get/put callback to revert the value
>>> as (0x3ff - raw value).  An decrement value isn't supposed to work.
>
> If you're using one of the SOC_xxx_TLV macros, you would set the 'invert'
> parameter.
>
>> I am getting the expected dB scaling with:
>> DECLARE_TLV_DB_MINMAX_MUTE(vol_tlv, -12800, 0)
>> does it make sense?
>
> Yes.  (-128 would have been -1.28 dB.)
>

Thanks.

Regards,
Sergej