linux-kernel - Re: [PATCH] ALSA: usb-audio: Add prevent wakeup from s3 state trig by Lenovo ThinkCentre TI024Gen3 USB-audio

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Message-Id: <74B3A9AD-8B49-4E5F-BE9F-BF88865304B7@canonical.com>
Date:   Thu, 20 Aug 2020 02:10:25 +0800
From:   Kai-Heng Feng <kai.heng.feng@...onical.com>
To:     Takashi Iwai <tiwai@...e.de>
Cc:     penghao <penghao@...ontech.com>,
        Mark Pearson <mpearson@...ovo.com>,
        Hui Wang <hui.wang@...onical.com>,
        Jaroslav Kysela <perex@...ex.cz>, alexander@...y.me,
        dan.carpenter@...cle.com, crwulff@...il.com, gustavoars@...nel.org,
        "moderated list:SOUND" <alsa-devel@...a-project.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH] ALSA: usb-audio: Add prevent wakeup from s3 state trig by
 Lenovo ThinkCentre TI024Gen3 USB-audio



> On Aug 20, 2020, at 01:18, Takashi Iwai <tiwai@...e.de> wrote:
> 
> [ Adding a few more relevant people to Cc. ]
> 
> On Wed, 19 Aug 2020 13:57:57 +0200,
> penghao wrote:
>> 
>> TI024Gen3 USB-audio is controlled by TI024Gen3,when TI024Gens
>> enter sleep mode, USB-audio will disconnect from USB bus port,
>> wakup form s3 state
>> 
>> Signed-off-by: penghao <penghao@...ontech.com>
>> ---
>> sound/usb/card.c | 6 ++++++
>> 1 file changed, 6 insertions(+)
>> 
>> diff --git a/sound/usb/card.c b/sound/usb/card.c
>> index 696e788c5d31..6bdbb34009b3 100644
>> --- a/sound/usb/card.c
>> +++ b/sound/usb/card.c
>> @@ -658,6 +658,12 @@ static int usb_audio_probe(struct usb_interface *intf,
>> 	}
>> 
>> 	dev_set_drvdata(&dev->dev, chip);
>> +	/*
>> +	 *ALSA: usb-audio: Add prevent wakeup from s3 state trig by Lenovo
>> +	 *ThinkCentre TI024Gen3 usb-audio
>> +	 */
>> +	if ((usb_id->idVendor == 0x17ef) && (usb_id->idProduct == 0xa012))
>> +		device_set_wakeup_enable(＆dev->dev, 0);
> 
> Here it's no proper ASCII letter, and this must be broken.
> Please check the actual patch before submitting.
> 
> In anyway, before going further, I'd like to hear from other people
> whether this is really mandatory and appropriate.  And whether it's
> specific to that device, too (not other Lenovo devices?)

If USB remote wakeup on this device is broken then we need to fix it in USB core instead of USB audio.
We need USB and xHCI logs to understand the real problem here, the commit message doesn't contain enough information.

Kai-Heng

> 
> 
> thanks,
> 
> Takashi