linux-kernel - Re: [PATCH RESEND] media: uvcvideo: Add support for Apple T2-attached FaceTime HD Camera

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Message-ID: <7A80783B-E8EE-4CEF-A09C-AE71C3072A7C@live.com>
Date:   Thu, 3 Feb 2022 12:51:36 +0000
From:   Aditya Garg <gargaditya08@...e.com>
To:     Laurent Pinchart <laurent.pinchart@...asonboard.com>
CC:     "mchehab@...nel.org" <mchehab@...nel.org>,
        "mchehab+huawei@...nel.org" <mchehab+huawei@...nel.org>,
        "hverkuil@...all.nl" <hverkuil@...all.nl>,
        "sergey.senozhatsky@...il.com" <sergey.senozhatsky@...il.com>,
        "ribalda@...omium.org" <ribalda@...omium.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        "linux-media@...r.kernel.org" <linux-media@...r.kernel.org>,
        Orlando Chamberlain <redecorating@...tonmail.com>,
        "paul@...rm.io" <paul@...rm.io>, Aun-Ali Zaidi <admin@...eit.net>
Subject: Re: [PATCH RESEND] media: uvcvideo: Add support for Apple T2-attached
 FaceTime HD Camera



> On 03-Feb-2022, at 5:29 AM, Laurent Pinchart <laurent.pinchart@...asonboard.com> wrote:
> 
> Hi Aditya,
> 
> On Wed, Feb 02, 2022 at 07:08:21AM +0000, Aditya Garg wrote:
>>> On 02-Feb-2022, at 12:07 PM, Laurent Pinchart wrote:
>>> On Wed, Jan 26, 2022 at 10:37:13AM +0000, Aditya Garg wrote:
>>>> From: Paul Pawlowski <paul@...rm.io>
>>>> 
>>>> Adds the requisite device id to support detection of the Apple FaceTime
>>>> HD webcam exposed over the T2 BCE VHCI interface.
>>>> 
>>>> Tested-by: Aun-Ali Zaidi <admin@...eit.net>
>>>> Signed-off-by: Paul Pawlowski <paul@...rm.io>
>>>> Signed-off-by: Aun-Ali Zaidi <admin@...eit.net>
>>>> Signed-off-by: Aditya Garg <gargaditya08@...e.com>
>>>> ---
>>>> drivers/media/usb/uvc/uvc_driver.c | 9 +++++++++
>>>> 1 file changed, 9 insertions(+)
>>>> 
>>>> diff --git a/drivers/media/usb/uvc/uvc_driver.c b/drivers/media/usb/uvc/uvc_driver.c
>>>> index 7c007426e..88dc9e7aa 100644
>>>> --- a/drivers/media/usb/uvc/uvc_driver.c
>>>> +++ b/drivers/media/usb/uvc/uvc_driver.c
>>>> @@ -2848,6 +2848,15 @@ static const struct usb_device_id uvc_ids[] = {
>>>> 	  .bInterfaceProtocol	= 0,
>>>> 	  .driver_info		= UVC_INFO_QUIRK(UVC_QUIRK_PROBE_MINMAX
>>>> 					| UVC_QUIRK_BUILTIN_ISIGHT) },
>>>> +	/* Apple FaceTime HD Camera (Built-In) */
>>>> +	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
>>>> +				| USB_DEVICE_ID_MATCH_INT_INFO,
>>>> +	  .idVendor		= 0x05ac,
>>>> +	  .idProduct		= 0x8514,
>>>> +	  .bInterfaceClass	= USB_CLASS_VIDEO,
>>>> +	  .bInterfaceSubClass	= 1,
>>>> +	  .bInterfaceProtocol	= 0,
>>>> +	  .driver_info		= (kernel_ulong_t)&uvc_quirk_probe_def },
>>> 
>>> Have you tested that the device doesn't work without this quirk ?
>> 
>> uvcvideo 1-2:1.1: Failed to query (129) UVC probe control : -110 (exp. 48).
>> uvcvideo 1-2:1.1: Failed to initialize the device (-5).
>> 
>> These errors are encountered without this patch
> 
> Thank you for the confirmation.
> 
> Reviewed-by: Laurent Pinchart <laurent.pinchart@...asonboard.com>
> 
> and applied to my tree.
Thanks !
> 
>>>> 	/* Apple Built-In iSight via iBridge */
>>>> 	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
>>>> 				| USB_DEVICE_ID_MATCH_INT_INFO,
> 
> -- 
> Regards,
> 
> Laurent Pinchart