udevinfo -a -p $(udevinfo -q path -p /class/video4linux/video2)

Udevinfo starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/class/video4linux/video2':
    KERNEL=="video2"
    SUBSYSTEM=="video4linux"
    DRIVER==""
    ATTR{card}=="10"
    ATTR{name}=="BT878 video _Hauppauge _bt878__"
    ATTR{dev}=="81:2"

  looking at parent device '/devices/pci0000:00/0000:00:08.0/0000:01:07.0':
    KERNELS=="0000:01:07.0"
    SUBSYSTEMS=="pci"
    DRIVERS=="bttv"
    ATTRS{msi_bus}==""
    ATTRS{broken_parity_status}=="0"
    ATTRS{enable}=="1"
    ATTRS{modalias}=="pci:v0000109Ed0000036Esv00000070sd000013EBbc04sc00i00"
    ATTRS{local_cpus}=="ff"
    ATTRS{irq}=="21"
    ATTRS{class}=="0x040000"
    ATTRS{subsystem_device}=="0x13eb"
    ATTRS{subsystem_vendor}=="0x0070"
    ATTRS{device}=="0x036e"
    ATTRS{vendor}=="0x109e"

  looking at parent device '/devices/pci0000:00/0000:00:08.0':
    KERNELS=="0000:00:08.0"
    SUBSYSTEMS=="pci"
    DRIVERS==""
    ATTRS{msi_bus}=="1"
    ATTRS{broken_parity_status}=="0"
    ATTRS{enable}=="1"
    ATTRS{modalias}=="pci:v000010DEd0000008Bsv00000000sd00000000bc06sc04i00"
    ATTRS{local_cpus}=="ff"
    ATTRS{irq}=="0"
    ATTRS{class}=="0x060400"
    ATTRS{subsystem_device}=="0x0000"
    ATTRS{subsystem_vendor}=="0x0000"
    ATTRS{device}=="0x008b"
    ATTRS{vendor}=="0x10de"

  looking at parent device '/devices/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""

> udevinfo -a -p $(udevinfo -q path -p /class/video4linux/video0)

Udevinfo starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/class/video4linux/video0':
    KERNEL=="video0"
    SUBSYSTEM=="video4linux"
    DRIVER==""
    ATTR{name}=="ivtv0 encoder MPEG"
    ATTR{dev}=="81:0"

  looking at parent device '/devices/pci0000:00/0000:00:08.0/0000:01:06.0/0000:02:08.0':
    KERNELS=="0000:02:08.0"
    SUBSYSTEMS=="pci"
    DRIVERS=="ivtv"
    ATTRS{msi_bus}==""
    ATTRS{broken_parity_status}=="0"
    ATTRS{enable}=="1"
    ATTRS{modalias}=="pci:v00004444d00000016sv00000070sd0000E807bc04sc00i00"
    ATTRS{local_cpus}=="ff"
    ATTRS{irq}=="19"
    ATTRS{class}=="0x040000"
    ATTRS{subsystem_device}=="0xe807"
    ATTRS{subsystem_vendor}=="0x0070"
    ATTRS{device}=="0x0016"
    ATTRS{vendor}=="0x4444"

  looking at parent device '/devices/pci0000:00/0000:00:08.0/0000:01:06.0':
    KERNELS=="0000:01:06.0"
    SUBSYSTEMS=="pci"
    DRIVERS==""
    ATTRS{msi_bus}=="1"
    ATTRS{broken_parity_status}=="0"
    ATTRS{enable}=="1"
    ATTRS{modalias}=="pci:v00003388d00000021sv00000000sd00000000bc06sc04i00"
    ATTRS{local_cpus}=="ff"
    ATTRS{irq}=="0"
    ATTRS{class}=="0x060400"
    ATTRS{subsystem_device}=="0x0000"
    ATTRS{subsystem_vendor}=="0x0000"
    ATTRS{device}=="0x0021"
    ATTRS{vendor}=="0x3388"

  looking at parent device '/devices/pci0000:00/0000:00:08.0':
    KERNELS=="0000:00:08.0"
    SUBSYSTEMS=="pci"
    DRIVERS==""
    ATTRS{msi_bus}=="1"
    ATTRS{broken_parity_status}=="0"
    ATTRS{enable}=="1"
    ATTRS{modalias}=="pci:v000010DEd0000008Bsv00000000sd00000000bc06sc04i00"
    ATTRS{local_cpus}=="ff"
    ATTRS{irq}=="0"
    ATTRS{class}=="0x060400"
    ATTRS{subsystem_device}=="0x0000"
    ATTRS{subsystem_vendor}=="0x0000"
    ATTRS{device}=="0x008b"
    ATTRS{vendor}=="0x10de"

  looking at parent device '/devices/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""

> udevinfo -a -p $(udevinfo -q path -p /class/video4linux/video1)

Udevinfo starts with the device specified by the devpath and then
walks up the chain of parent devices. It prints for every device
found, all possible attributes in the udev rules key format.
A rule to match, can be composed by the attributes of the device
and the attributes from one single parent device.

  looking at device '/class/video4linux/video1':
    KERNEL=="video1"
    SUBSYSTEM=="video4linux"
    DRIVER==""
    ATTR{name}=="ivtv1 encoder MPEG"
    ATTR{dev}=="81:1"

  looking at parent device '/devices/pci0000:00/0000:00:08.0/0000:01:06.0/0000:02:09.0':
    KERNELS=="0000:02:09.0"
    SUBSYSTEMS=="pci"
    DRIVERS=="ivtv"
    ATTRS{msi_bus}==""
    ATTRS{broken_parity_status}=="0"
    ATTRS{enable}=="1"
    ATTRS{modalias}=="pci:v00004444d00000016sv00000070sd0000E817bc04sc00i00"
    ATTRS{local_cpus}=="ff"
    ATTRS{irq}=="20"
    ATTRS{class}=="0x040000"
    ATTRS{subsystem_device}=="0xe817"
    ATTRS{subsystem_vendor}=="0x0070"
    ATTRS{device}=="0x0016"
    ATTRS{vendor}=="0x4444"

  looking at parent device '/devices/pci0000:00/0000:00:08.0/0000:01:06.0':
    KERNELS=="0000:01:06.0"
    SUBSYSTEMS=="pci"
    DRIVERS==""
    ATTRS{msi_bus}=="1"
    ATTRS{broken_parity_status}=="0"
    ATTRS{enable}=="1"
    ATTRS{modalias}=="pci:v00003388d00000021sv00000000sd00000000bc06sc04i00"
    ATTRS{local_cpus}=="ff"
    ATTRS{irq}=="0"
    ATTRS{class}=="0x060400"
    ATTRS{subsystem_device}=="0x0000"
    ATTRS{subsystem_vendor}=="0x0000"
    ATTRS{device}=="0x0021"
    ATTRS{vendor}=="0x3388"

  looking at parent device '/devices/pci0000:00/0000:00:08.0':
    KERNELS=="0000:00:08.0"
    SUBSYSTEMS=="pci"
    DRIVERS==""
    ATTRS{msi_bus}=="1"
    ATTRS{broken_parity_status}=="0"
    ATTRS{enable}=="1"
    ATTRS{modalias}=="pci:v000010DEd0000008Bsv00000000sd00000000bc06sc04i00"
    ATTRS{local_cpus}=="ff"
    ATTRS{irq}=="0"
    ATTRS{class}=="0x060400"
    ATTRS{subsystem_device}=="0x0000"
    ATTRS{subsystem_vendor}=="0x0000"
    ATTRS{device}=="0x008b"
    ATTRS{vendor}=="0x10de"

  looking at parent device '/devices/pci0000:00':
    KERNELS=="pci0000:00"
    SUBSYSTEMS==""
    DRIVERS==""