linux-kernel - Re: [PATCH] ALSA: usb-audio: apply quirk for Huawei Technologies Co., Ltd. CM-Q3

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Message-ID: <87ecr9af16.wl-tiwai@suse.de>
Date: Sat, 11 Oct 2025 12:50:13 +0200
From: Takashi Iwai <tiwai@...e.de>
To: Cryolitia PukNgae <cryolitia.pukngae@...ux.dev>
Cc: Jaroslav Kysela <perex@...ex.cz>,
	Takashi Iwai <tiwai@...e.com>,
	Cryolitia PukNgae <cryolitia@...ontech.com>,
	linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	stable@...r.kernel.org,
	zhanjun@...ontech.com,
	niecheng1@...ontech.com,
	anguoli@...ontech.com,
	zhaochengyi@...ontech.com,
	fengyuan@...ontech.com
Subject: Re: [PATCH] ALSA: usb-audio: apply quirk for Huawei Technologies Co., Ltd. CM-Q3

On Sat, 11 Oct 2025 11:51:18 +0200,
Cryolitia PukNgae wrote:
> 
> There're several different actual hardwares sold by Huawei, using the
> same USB ID 12d1:3a07.
> 
> The first one we found, having a volume control named "Headset Playback
> Volume", reports a min value -15360, and will mute iff setting it to
> -15360. It can be simply fixed by quirk flag MIXER_PLAYBACK_MIN_MUTE,
> which we have already submitted previously.[1]
> 
> The second one we found today, having a volume control named "PCM
> Playback Volume", reports its min -11520 and res 256, and will mute
> when less than -11008. Because of the already existing quirk flag, we
> can just set its min to -11264, and the new minimum value will still
> not be available to userspace, so that userspace's minimum will be the
> correct -11008.
> 
> 1. https://lore.kernel.org/all/20250903-sound-v1-3-d4ca777b8512@uniontech.com/
> 
> Tested-by: Guoli An <anguoli@...ontech.com>
> Signed-off-by: Cryolitia PukNgae <cryolitia.pukngae@...ux.dev>

Thanks, applied now.


Takashi