linux-kernel - Re: 答复: [PATCH] ALSA: usb-audio: Add delay quirk for USB Audio Device

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Message-ID: <875xmglb8u.wl-tiwai@suse.de>
Date: Wed, 15 Jan 2025 09:41:53 +0100
From: Takashi Iwai <tiwai@...e.de>
To: 胡连勤 <hulianqin@...o.com>
Cc: Takashi Iwai <tiwai@...e.de>,
	"perex@...ex.cz" <perex@...ex.cz>,
	"tiwai@...e.com" <tiwai@...e.com>,
	"lina@...hilina.net" <lina@...hilina.net>,
	"mbarriolinares@...il.com"
	<mbarriolinares@...il.com>,
	"wangdicheng@...inos.cn"
	<wangdicheng@...inos.cn>,
	"cyan.vtb@...il.com" <cyan.vtb@...il.com>,
	"dan.carpenter@...aro.org" <dan.carpenter@...aro.org>,
	"bsevens@...gle.com"
	<bsevens@...gle.com>,
	"linux-sound@...r.kernel.org"
	<linux-sound@...r.kernel.org>,
	"linux-kernel@...r.kernel.org"
	<linux-kernel@...r.kernel.org>
Subject: Re: 答复: [PATCH] ALSA: usb-audio: Add delay quirk
 for USB Audio Device

On Wed, 15 Jan 2025 09:30:14 +0100,
胡连勤 wrote:
> 
>  Hello linux kernel expert:
> 
> > On Wed, 15 Jan 2025 07:45:33 +0100,
> > 胡连勤 wrote:
> > >
> > > From: Lianqin Hu <hulianqin@...o.com>
> > >
> > > Audio control requests that sets sampling frequency sometimes fail on
> > > this card. Adding delay between control messages eliminates that problem.
> > >
> > > Signed-off-by: Lianqin Hu <hulianqin@...o.com>
> > 
> > Could you give a bit more specific name / model to both the subject and the
> > quirk comment?  Then it'd be more helpful for people who read / check the
> > changes later.
> 
> We used this sound card to connect to the phone, and only saw the following information in the log, without specific sound card model information:
> 
> usb 1-1: New USB device found, idVendor=0d8c, idProduct=0014, bcdDevice= 1.00
> usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> usb 1-1: Product: USB Audio Device
> usb 1-1: Manufacturer: C-Media Electronics Inc.
> usb 1-1: usb_probe_device
> 
> We currently do not have an effective way to obtain the detailed model of this sound card. We are very sorry.

Well, you can put such info in the patch description.  It's already
helpful to know whether it's an an unknown / unnamed product.


thanks,

Takashi