Public bug reported:
SRU Justification:
==================
[Impact]
Qualcomm FastConnect 7800 (WCN7850/WCN7851) Wi-Fi 7 devices experience firmware
load failures with certain hardware versions, preventing Wi-Fi connectivity and
disabling Wi-Fi 7 features (MLO, 320MHz channels, higher throughput).
[Fix]
Cherry-pick two upstream linux-firmware commits in sequence to maintain proper
firmware version history and avoid binary conflicts:
1. Commit 360fd45301707daa3d95be32d84132481b17db46
"ath12k: WCN7850 hw2.0: update to
WLAN.HMT.1.1.c5-00284-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3"
2. Commit 2e91d8c3c4bd34a27177180a38f62d3ba3c96031
"ath12k: WCN7850 hw2.0: update to
WLAN.HMT.1.1.c5-00284.1-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3"
Both commits update:
- ath12k/WCN7850/hw2.0/amss.bin (firmware binary)
- WHENCE (version metadata)
[Test Plan]
$ sudo dmesg |grep 00284.1
[ 6.305015] ath12k_pci 0000:03:00.0: fw_version 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_SILICONZ-3
Connect the WiFi in gnome control center.
Test the connections by iperf.
$ iperf -s
$ iperf -c xxx
Test covered basic wifi functions, 6Ghz is not tested because the regulations.
[Where problems could occur]
It might break WCN7850 functions.
** Affects: hwe-next
Importance: Undecided
Status: New
** Affects: linux-firmware (Ubuntu)
Importance: Undecided
Status: New
** Tags: jira-somerville-2383 oem-priority somerville
** Tags added: jira-somerville-2383 oem-priority somerville
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https://bugs.launchpad.net/bugs/2138915
Title:
[SRU] ath12k: WCN7850 hw2.0 firmware updates to enable Wi-Fi 7
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