linux-kernel - Re: [PATCH] ALSA: usb-audio: Add implicit feedback quirk for RODE AI-1

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Message-ID: <87plfmxkng.wl-tiwai@suse.de>
Date: Mon, 02 Jun 2025 16:50:27 +0200
From: Takashi Iwai <tiwai@...e.de>
To: "David Heimann" <d@...h.net>
Cc: tiwai@...e.com,
	perex@...ex.cz,
	linux-sound@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ALSA: usb-audio: Add implicit feedback quirk for RODE AI-1

On Sun, 01 Jun 2025 18:41:16 +0200,
David Heimann wrote:
> 
> The RODE AI-1 audio interface requires implicit feedback sync between playback endpoint 0x03 and feedback endpoint 0x84 on interface 3, but doesn't advertise this in its USB descriptors.
> 
> Without this quirk, the device receives audio data but produces no output.
> 
> Signed-off-by: David Heimann <d@...h.net>
> ---
> Tested using module parameter:
>   options snd-usb-audio implicit_fb=1:19f7:000a
> 
> This device previously worked but stopped producing audio output (possibly after a kernel or audio subsystem update). This quirk restores functionality.
> 
> This resolves audio output on the RODE AI-1 which otherwise receives audio data but produces no sound.

Applied now.  Thanks.


Takashi