linux-kernel - Re: [PATCH] ALSA: usb: mixer: volume quirk for ESS Technology Asus USB DAC

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Date:   Tue, 26 May 2020 09:04:22 +0200
From:   Takashi Iwai <tiwai@...e.de>
To:     Chris Chiu <chiu@...lessm.com>
Cc:     perex@...ex.cz, tiwai@...e.com, benquike@...il.com,
        alsa-devel@...a-project.org, linux-kernel@...r.kernel.org,
        linux@...lessm.com
Subject: Re: [PATCH] ALSA: usb: mixer: volume quirk for ESS Technology Asus USB DAC

On Tue, 26 May 2020 08:26:13 +0200,
Chris Chiu wrote:
> 
> The Asus USB DAC is a USB type-C audio dongle for connecting to
> the headset and headphone. The volume minimum value -23040 which
> is 0xa600 in hexadecimal with the resolution value 1 indicates
> this should be endianness issue caused by the firmware bug. Add
> a volume quirk to fix the volume control problem.
> 
> Also fixes this warning:
>   Warning! Unlikely big volume range (=23040), cval->res is probably wrong.
>   [5] FU [Headset Capture Volume] ch = 1, val = -23040/0/1
>   Warning! Unlikely big volume range (=23040), cval->res is probably wrong.
>   [7] FU [Headset Playback Volume] ch = 1, val = -23040/0/1
> 
> Signed-off-by: Chris Chiu <chiu@...lessm.com>

Applied with Cc to stable now.  Thanks.


Takashi