ath11k driver DBDC support

[Cristian Ciobanu]

Hello,

I have purchased this M.2 wireless card
https://www.sparklan.com/product/wnfq-269axbt-wifi6-wifi6e-11ax-triband-m-2-dbdc-module/
based on the WCN6856 chipset which states that it supports DBDC but I
cannot make it work on Linux.  I plan to use it as an Soft AP for 2.4
and 5/6Ghz.

Does someone know if this DBDC feature is not yet supported in the
current ath11k driver or is this a firmware limitation?

The card is detected and the ath11k driver is loaded but I only see
one wlan card shown in the output of ip addr show command.

Below is some output from dmesg log

dmesg | grep ath11k
[   38.374925] ath11k_pci 0000:02:00.0: BAR 0: assigned [mem
0x7fc00000-0x7fdfffff 64bit]
[   38.374953] ath11k_pci 0000:02:00.0: enabling device (0000 -> 0002)
[   38.375306] ath11k_pci 0000:02:00.0: MSI vectors: 32
[   38.375313] ath11k_pci 0000:02:00.0: wcn6855 hw2.1
[   39.749474] ath11k_pci 0000:02:00.0: chip_id 0x12 chip_family 0xb
board_id 0xff soc_id 0x400c1211
[   39.749481] ath11k_pci 0000:02:00.0: fw_version 0x110b196e
fw_build_timestamp 2022-12-22 12:54 fw_build_id
WLAN.HSP.1.1-03125-QCAHSPSWPL_V1_V2_SILICONZ_LITE-3.6510.23

Lspci detects it as an Qualcomm Atheros QCNFA765 [17cb:1103] 9rev01)
network controller
Subsystem : Lite-On Communications Inc Device [11ad:a85d]

Please let me know if you need more information

Kind regards,