Enabling 6 GHz band in WCN785x

[Petros Christopoulos <petros.christopoulos@gmail.com>]

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Dear all, I have a Qualcomm Technologies, Inc WCN785x Wi-Fi 7(802.11be) 
320MHz 2x2 [FastConnect 7800] [17cb:1107] (rev 01) Wifi controller
with Fedora 42 KDE, latest kernel 6.15.9-201.fc42.x86_64 and recent 
firmware 0x1108811c fw_build_timestamp 2025-05-17 00:21 fw_build_id 
QC_IMAGE_VERSION_STRING=WLAN.HMT.1.1.c5-00284.1-QCAHMTSWPL_V1.0_V2.0_SI
LICONZ-3

The 6 GHz band is disabled, I suspect that the problem is the 00 region 
setting in phy#1, however as this is "self-managed" I have not managed 
to change this (iw reg set or an /etc/modprobe.d/ath12k.conf file with 
"options ath12k country=DE" have no effects).

$ iw reg get
global
country DE: DFS-ETSI
(2400 - 2483 @ 40), (N/A, 20), (N/A)
(5150 - 5250 @ 80), (N/A, 23), (N/A), NO-OUTDOOR, AUTO-BW
(5250 - 5350 @ 80), (N/A, 20), (0 ms), NO-OUTDOOR, DFS, AUTO-BW
(5470 - 5725 @ 160), (N/A, 26), (0 ms), DFS
(5725 - 5875 @ 80), (N/A, 13), (N/A)
(5945 - 6425 @ 320), (N/A, 23), (N/A), NO-OUTDOOR
(57000 - 66000 @ 2160), (N/A, 40), (N/A)

phy#1 (self-managed)
country 00: DFS-UNSET
(2402 - 2472 @ 40), (N/A, 20), (N/A)
(2457 - 2482 @ 20), (N/A, 20), (N/A), PASSIVE-SCAN
(5170 - 5330 @ 160), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
(5490 - 5730 @ 160), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN
(5735 - 5895 @ 160), (N/A, 20), (N/A), AUTO-BW, PASSIVE-SCAN

I have searched extensively the web, found some relevant articles (e.g. 
https://patchwork.kernel.org/project/linux-wireless/patch/20250401020840.357-5-quic_kangyang@quicinc.com/, 
which should be integrated into 6.15.9 if I understand correctly), but 
still no solution.

I would be grateful for some help.

Thank you very much.



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