DVB device not initialized

[roger_far]

I have a KWorld UB435-Q USB v3 ATSC USB stick.

I want to register this device on the proxmox host so I can pass it through to a LXC container.

When I plugin the stick I get this output:

lsusb:
Bus 001 Device 012: ID 1b80:e34c Afatech UB435-Q ATSC TV Stick

dmesg:

[127871.387031] usb 1-2.2: new high-speed USB device number 12 using xhci_hcd
[127871.487781] usb 1-2.2: New USB device found, idVendor=1b80, idProduct=e34c, bcdDevice= 1.00
[127871.487784] usb 1-2.2: New USB device strings: Mfr=0, Product=1, SerialNumber=2
[127871.487785] usb 1-2.2: Product: USB 2875 Device
[127871.487785] usb 1-2.2: SerialNumber: 1
[127871.489016] em28xx 1-2.2:1.0: New device  USB 2875 Device @ 480 Mbps (1b80:e34c, interface 0, class 0)
[127871.489018] em28xx 1-2.2:1.0: DVB interface 0 found: bulk
[127871.547070] em28xx 1-2.2:1.0: chip ID is em2874
[127872.061202] em28xx 1-2.2:1.0: EEPROM ID = 26 00 01 00, EEPROM hash = 0x5d3e97ab
[127872.061207] em28xx 1-2.2:1.0: EEPROM info:
[127872.061208] em28xx 1-2.2:1.0:       microcode start address = 0x0004, boot configuration = 0x01
[127872.083751] em28xx 1-2.2:1.0:       AC97 audio (5 sample rates)
[127872.083754] em28xx 1-2.2:1.0:       500mA max power
[127872.083755] em28xx 1-2.2:1.0:       Table at offset 0x24, strings=0x206a, 0x048a, 0x0000
[127872.143013] em28xx 1-2.2:1.0: Identified as KWorld USB ATSC TV Stick UB435-Q V3 (card=93)
[127872.143018] em28xx 1-2.2:1.0: dvb set to bulk mode.

But it doesn't register a /dev/dvb device.

I spun up a Ubuntu VM, passed the USB device through and it seems to load OK:

[    1.637268] em28xx 2-1:1.0: New device  USB 2875 Device @ 480 Mbps (1b80:e34c, interface 0, class 0)
[    1.637271] em28xx 2-1:1.0: DVB interface 0 found: bulk
[    1.697228] em28xx 2-1:1.0: chip ID is em2874
[    2.220205] em28xx 2-1:1.0: EEPROM ID = 26 00 01 00, EEPROM hash = 0x5d3e97ab
[    2.220210] em28xx 2-1:1.0: EEPROM info:
[    2.220211] em28xx 2-1:1.0:  microcode start address = 0x0004, boot configuration = 0x01
[    2.243928] em28xx 2-1:1.0:  AC97 audio (5 sample rates)
[    2.243933] em28xx 2-1:1.0:  500mA max power
[    2.243940] em28xx 2-1:1.0:  Table at offset 0x24, strings=0x206a, 0x048a, 0x0000
[    2.301090] em28xx 2-1:1.0: Identified as KWorld USB ATSC TV Stick UB435-Q V3 (card=93)
[    2.301096] em28xx 2-1:1.0: dvb set to bulk mode.
[    2.301188] usbcore: registered new interface driver em28xx
[    2.310778] em28xx 2-1:1.0: Binding DVB extension
[    2.329221] tda18212 2-0060: NXP TDA18212HN/M successfully identified
[    2.329237] dvbdev: DVB: registering new adapter (2-1:1.0)
[    2.329239] em28xx 2-1:1.0: DVB: registering adapter 0 frontend 0 (LG Electronics LGDT3305 VSB/QAM Frontend)...
[    2.329242] dvbdev: dvb_create_media_entity: media entity 'LG Electronics LGDT3305 VSB/QAM Frontend' registered.
[    2.329587] dvbdev: dvb_create_media_entity: media entity 'dvb-demux' registered.
[    2.330699] em28xx 2-1:1.0: DVB extension successfully initialized
[    2.330702] em28xx: Registered (Em28xx dvb Extension) extension

I checked the em28xx firmware, they're the same version on both system, but it seems that there is something else that needs to be added to add DVB support, but it's not very obvious.