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

[Aditya Garg <gargaditya08@live.com>]

Hi Laurent

> On 02-Feb-2022, at 12:07 PM, Laurent Pinchart <laurent.pinchart@ideasonboard.com> wrote:
> 
> 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@mrarm.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@kodeit.net>
>> Signed-off-by: Paul Pawlowski <paul@mrarm.io>
>> Signed-off-by: Aun-Ali Zaidi <admin@kodeit.net>
>> Signed-off-by: Aditya Garg <gargaditya08@live.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
> 
>> 	/* Apple Built-In iSight via iBridge */
>> 	{ .match_flags		= USB_DEVICE_ID_MATCH_DEVICE
>> 				| USB_DEVICE_ID_MATCH_INT_INFO,
> 
> -- 
> Regards,
> 
> Laurent Pinchart