linux-kernel - Re: [PATCH v30 00/30] Introduce QC USB SND audio offloading support

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Message-ID: <875xoi3wqw.wl-tiwai@suse.de>
Date: Wed, 20 Nov 2024 13:39:19 +0100
From: Takashi Iwai <tiwai@...e.de>
To: Wesley Cheng <quic_wcheng@...cinc.com>
Cc: Greg KH <gregkh@...uxfoundation.org>,
	<srinivas.kandagatla@...aro.org>,
	<mathias.nyman@...el.com>,
	<perex@...ex.cz>,
	<conor+dt@...nel.org>,
	<dmitry.torokhov@...il.com>,
	<corbet@....net>,
	<broonie@...nel.org>,
	<lgirdwood@...il.com>,
	<krzk+dt@...nel.org>,
	<pierre-louis.bossart@...ux.dev>,
	<Thinh.Nguyen@...opsys.com>,
	<tiwai@...e.com>,
	<robh@...nel.org>,
	<linux-kernel@...r.kernel.org>,
	<devicetree@...r.kernel.org>,
	<linux-sound@...r.kernel.org>,
	<linux-usb@...r.kernel.org>,
	<linux-input@...r.kernel.org>,
	<linux-arm-msm@...r.kernel.org>,
	<linux-doc@...r.kernel.org>
Subject: Re: [PATCH v30 00/30] Introduce QC USB SND audio offloading support

On Tue, 19 Nov 2024 18:50:52 +0100,
Wesley Cheng wrote:
> 
> 
> On 11/15/2024 11:42 PM, Greg KH wrote:
> > On Fri, Nov 15, 2024 at 02:42:47PM -0800, Wesley Cheng wrote:
> >> Hi,
> >>
> >> On 11/6/2024 11:33 AM, Wesley Cheng wrote:
> >>> Requesting to see if we can get some Acked-By tags, and merge on usb-next.
> >> Are there any more clarifications that I can help with to get this
> >> series going?  I know its been a long time coming, so folks may have
> >> lost context, but if there are any points that might be blocking the
> >> series from getting merged, please let me know.
> > I would like others to review this (xhci maintainer for one), to give
> > their blessing before I even consider this.
> 
> Thanks, Greg...Yes, I was hoping to see if I could clarify any points for Mathias and Takashi if they had any concerns.  Just so folks are also aware, we did deploy a portion of the series (specifically the XHCI sec interrupter and USB SND core changes) into devices on the market, if that adds any confidence into those changes.  For the most part, there were no major issues within those drivers, and the single minor bug (in the XHCI sec intr) that we did catch was fixed in previous submissions, and should be highlighted in the change revision list.

Well, from the sound subsystem side, the only concerns are the design
issues: namely, whether the implementations with two cards are
acceptable, and whether the current control of PCM mapping is OK from
the user POV.  IIRC, there were discussions with Intel people and
others, and I haven't followed whether we got consensus.
If we reached some agreement, it'd be appreciated if you can put acks
from them in the patches, too.

The internal implementation details can be adjusted later, but those
two must be set in stone after merging the stuff to the upstream.

(BTW, the mail address of Pierre changed; I corrected in this mail.)


thanks,

Takashi