linux-kernel - 答复: 答复: 答复: [PATCH v2] usb: gadget: uvc: Fixes the abnormal enumeration problem of mobile phone as UVC camera.

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Message-ID:
 <TYUPR06MB621792398C6E5CF084D4586DD2B12@TYUPR06MB6217.apcprd06.prod.outlook.com>
Date: Wed, 31 Jul 2024 10:01:45 +0000
From: 胡连勤 <hulianqin@...o.com>
To: "gregkh@...uxfoundation.org" <gregkh@...uxfoundation.org>
CC: "akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	opensource.kernel <opensource.kernel@...o.com>
Subject:
 答复: 答复: 答复: [PATCH v2] usb: gadget: uvc: Fixes the abnormal enumeration problem of mobile phone as UVC camera.

Hello linux community expert:

I see no "Fixes:" tag here :(
 ----- Modify the email title Fixed -> Fixes

From the previous communication, the following message seems not to be placed in the body of the email, 
so I changed the title of the email to it, so there is - Modify "Fixes:" tag on the commit.

usb: gadget: uvc: Fixes the abnormal enumeration problem of mobile phone as UVC camera.

Thanks

-----邮件原件-----
发件人: gregkh@...uxfoundation.org <gregkh@...uxfoundation.org> 
发送时间: 2024年7月31日 17:49
收件人: 胡连勤 <hulianqin@...o.com>
抄送: akpm@...ux-foundation.org; linux-kernel@...r.kernel.org; opensource.kernel <opensource.kernel@...o.com>
主题: Re: 答复: 答复: [PATCH v2] usb: gadget: uvc: Fixed the abnormal enumeration problem of mobile phone as UVC camera.

On Wed, Jul 31, 2024 at 09:39:16AM +0000, 胡连勤 wrote:
> When the phone is connected to the computer to use the webcam 
> function, the phone needs to be enumerated as a uvc camera function.
> 
> Because uvc->func.bind_deactivated is configured as true in the f_uvc 
> driver uvc_alloc function, the usb_gadget_deactivate function is 
> called during the execution of the configfs_composite_bind function to 
> set gadget->deactivated to true, which in turn causes the 
> usb_gadget_connect_locked function to fail to call the corresponding 
> controller pullup operation (such as: dwc3_gadget_pullup, 
> mtu3_gadget_pullup), and the USB cannot be enumerated normally under 
> the uvc function combination.
> 
> After applying this patch, we measured that under the uvc function, 
> the dwc3 controller and the mtu3 controller can be enumerated 
> normally, and the webcam function is normal.
> 
> Therefore, modify the f_uvc driver to remove the operation of setting
> uvc->func.bind_deactivated to true.
> 
> Signed-off-by: Lianqin Hu <hulianqin@...o.com>
> ---
> v2:
>   - Modify "Fixes:" tag on the commit
>   - Modify description information.

I see no "Fixes:" tag here :(