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

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Date:   Thu, 3 Feb 2022 01:59:20 +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,

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.

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

-- 
Regards,

Laurent Pinchart