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

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Date:   Wed, 2 Feb 2022 08:37:35 +0200
From:   Laurent Pinchart <laurent.pinchart@...asonboard.com>
To:     Aditya Garg <gargaditya08@...e.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

Hi Aditya,

Thank you for the patch, and sorry for the late reply.

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 ?

>  	/* Apple Built-In iSight via iBridge */
>  	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
>  				| USB_DEVICE_ID_MATCH_INT_INFO,

-- 
Regards,

Laurent Pinchart