linux-kernel - Re: [PATCH] ALSA: usb-audio: retry clock validate when it takes some times

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Date: Thu, 01 Feb 2024 14:02:16 +0100
From: Takashi Iwai <tiwai@...e.de>
To: Alexander Tsoy <alexander@...y.me>
Cc: vincenttew <vincenttew@...gle.com>,
	perex@...ex.cz,
	tiwai@...e.com,
	linux-kernel@...r.kernel.org,
	alsa-devel@...a-project.org
Subject: Re: [PATCH] ALSA: usb-audio: retry clock validate when it takes some times

On Thu, 01 Feb 2024 11:36:11 +0100,
Alexander Tsoy wrote:
> 
> В Чт, 01/02/2024 в 15:06 +0800, vincenttew пишет:
> > Behringer UMC202HD and UMC404HD take some times to validate the clock
> > source. To prevent more DAC have the same delay which return the
> > false
> > in the first time, remove the USB id check to have a chance to retry
> > the
> > clock validate.
> > 
> > Signed-off-by: vincenttew <vincenttew@...gle.com>
> 
> Thank you for the patch! My thought about this change:
> - Retrying clock source validation probably make sense only in the case
> of Internal clock. But I'm not sure.

It's an interesting point.

> - If we want to make this a standard driver behaviour, then the code
> needs to be moved out of the quirk function IMO.

I'm a bit afraid of applying this unconditionally to all cases.  At
first, we can start with the vendor matching (e.g. MOTU and Behringer)
to apply it...


thanks,

Takashi