Re: Philips Monitor with webcam

[Mauro Carvalho Chehab <mchehab+huawei@kernel.org>]

Em Wed, 04 Nov 2020 17:25:48 +0100
Gregor Hlawacek <g.hlawacek@hzdr.de> escreveu:

> On Wed, 2020-11-04 at 17:02 +0100, Mauro Carvalho Chehab wrote:
> > Em Wed, 04 Nov 2020 14:24:34 +0100
> > Gregor Hlawacek <g.hlawacek@hzdr.de> escreveu:
> >   
> > > Hi all
> > > 
> > > I own a Philips Brilliance 241B which has a webcam attached. The
> > > device
> > > is listed as 0412:612b Chicony Electronics Co., Ltd, bubt doesn't
> > > work
> > > with the latest UVC stock kernel driver. Is there any hope to get
> > > this
> > > supported?
> > > 
> > > uname -a:
> > > Linux it72 5.9.3-arch1-1 #1 SMP PREEMPT Sun, 01 Nov 2020 12:58:59
> > > +0000
> > > x86_64 GNU/Linux
> > > 
> > > running Arch Linux on a Lenovo Thinkpad  T490s
> > > 
> > > dmesg:
> > > 
> > > [76850.137838] usb 3-1.1.1.2: New USB device found, idVendor=04f2,
> > > idProduct=b612, bcdDevice= 2.10
> > > [76850.137841] usb 3-1.1.1.2: New USB device strings: Mfr=1,
> > > Product=2,
> > > SerialNumber=3
> > > [76850.137843] usb 3-1.1.1.2: Product: USB2.0 FHD UVC WebCam
> > > [76850.137845] usb 3-1.1.1.2: Manufacturer: SunplusIT Inc
> > > [76850.137846] usb 3-1.1.1.2: SerialNumber: 01.00.00
> > > [76850.152761] uvcvideo: Found UVC 1.50 device USB2.0 FHD UVC
> > > WebCam
> > > (04f2:b612)
> > > [76850.215683] input: USB2.0 FHD UVC WebCam: USB2.0 F as
> > > /devices/pci0000:00/0000:00:1c.4/0000:04:00.0/0000:05:02.0/0000:3c:
> > > 00.0
> > > /usb3/3-1/3-1.1/3-1.1.1/3-1.1.1.2/3-1.1.1.2:1.0/input/input66
> > > [76850.223642] uvcvideo: Found UVC 1.50 device USB2.0 FHD UVC
> > > WebCam
> > > (04f2:b612)
> > > [76850.232499] usb 4-1.1.2: new SuperSpeed Gen 1 USB device number
> > > 5
> > > using xhci_hcd
> > > [76850.241004] input: USB2.0 FHD UVC WebCam: IR Camer as
> > > /devices/pci0000:00/0000:00:1c.4/0000:04:00.0/0000:05:02.0/0000:3c:
> > > 00.0
> > > /usb3/3-1/3-1.1/3-1.1.1/3-1.1.1.2/3-1.1.1.2:1.2/input/input67  
> > 
> > Hmm... it sounds that the camera was properly detected here. 
> > 
> > Could you please enclose the contents of the following command?
> > 
> >         $ v4l2-ctl --all
> > 
> > Thanks,
> > Mauro  
> 
> Hi Mauro 
> 
> thanks for the quick answer. Here is the output but I am pretty sure
> that this come from the integrated laptop camera and not the one in the
> external monitor

Well, you can use "-d" parameter to identify the device, like:

	$ v4l2-ctl -d /dev/v4l/by-path/pci-0000\:00\:14.0-usb-0\:3.2\:1.0-video-index0 --all

The real path depends on your camera - you can take a look at:

	$ tree /dev/v4l/
	/dev/v4l/
	├── by-id
	│   ├── usb-046d_HD_Pro_Webcam_C920_55DA1CCF-video-index0 -> ../../video0
	│   └── usb-046d_HD_Pro_Webcam_C920_55DA1CCF-video-index1 -> ../../video1
	└── by-path
	    ├── pci-0000:00:14.0-usb-0:3.2:1.0-video-index0 -> ../../video0
	    └── pci-0000:00:14.0-usb-0:3.2:1.0-video-index1 -> ../../video1

	
In order to check the ones that were detected.

Regards,
Mauro