[PATCH v10 3/3] wifi: ath12k: report station mode signal strength

[Jeff Johnson]

On 1/14/2025 10:35 PM, Lingbo Kong wrote:
> Currently, the signal strength of "iw dev xxx station dump" always show an
> invalid value.
> 
> This is because signal strength is only set in ath12k_mgmt_rx_event()
> function, and not set for received data packet. So, change to get signal
> from firmware and report to mac80211.
> 
> After that, "iw dev xxx station dump" show the correct signal strength.
> Such as:
> 
> Station 00:03:7f:12:03:03 (on wlo1)
>         inactive time:  36 ms
>         rx bytes:       61571
>         rx packets:     336
>         tx bytes:       28204
>         tx packets:     205
>         tx retries:     49
>         tx failed:      0
>         beacon loss:    0
>         beacon rx:      83
>         rx drop misc:   66
>         signal:         -24 dBm
>         beacon signal avg:      -22 dBm
> 
> For WCN7850, the firmware supports db2dbm, so not need to add noise floor.
> For QCN9274, the firmware not support db2dbm, so need to add noise floor.
> 
> This patch affects the station mode of WCN7850 and QCN9274.
> 
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3
> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.1.1-00214-QCAHKSWPL_SILICONZ-1
> 
> Signed-off-by: Lingbo Kong <quic_lingbok at quicinc.com>

FYI this patch did not apply cleanly to ath/main

* Applying v10_20250115_quic_lingbok_wifi_ath12k_report_station_mode_stats.mbx 
Applying: wifi: ath12k: report station mode transmit rate
Applying: wifi: ath12k: report station mode receive rate for IEEE 802.11be
Applying: wifi: ath12k: report station mode signal strength
Using index info to reconstruct a base tree...
M       drivers/net/wireless/ath/ath12k/core.h
M       drivers/net/wireless/ath/ath12k/mac.c
M       drivers/net/wireless/ath/ath12k/wmi.c
M       drivers/net/wireless/ath/ath12k/wmi.h
Falling back to patching base and 3-way merge...
Auto-merging drivers/net/wireless/ath/ath12k/wmi.h
CONFLICT (content): Merge conflict in drivers/net/wireless/ath/ath12k/wmi.h
Auto-merging drivers/net/wireless/ath/ath12k/wmi.c
Auto-merging drivers/net/wireless/ath/ath12k/mac.c
Auto-merging drivers/net/wireless/ath/ath12k/core.h
Recorded preimage for 'drivers/net/wireless/ath/ath12k/wmi.h'
error: Failed to merge in the changes.
Patch failed at 0003 wifi: ath12k: report station mode signal strength

My trivial fixup in the pending branch:
https://git.kernel.org/pub/scm/linux/kernel/git/ath/ath.git/commit/?h=pending&id=a94d6e4db20fa42180d576207de8d5e2f5533823