[PATCH ath-next V4] wifi: ath12k: report station mode per-chain signal strength

[Baochen Qiang]

On 8/12/2025 11:00 AM, Lingbo Kong wrote:
> From: Lingbo Kong <lingbo.kong at oss.qualcomm.com>
> 
> Currently, command “iw wlan0 station dump” does not show per-chain signal
> strength.
> 
> This is because ath12k does not handle the num_per_chain_rssi and
> rssi_avg_beacon reported by firmware to ath12k.
> 
> To address this, update ath12k to send WMI_REQUEST_STATS_CMDID with the
> flag WMI_REQUEST_RSSI_PER_CHAIN_STAT to the firmware. Then, add logic to
> handle num_per_chain_rssi and rssi_avg_beacon in the
> ath12k_wmi_tlv_fw_stats_parse(), and assign the resulting per-chain signal
> strength to the chain_signal of struct station_info.
> 
> After that, "iw dev xxx station dump" shows the correct per-chain signal
> strength.
> Such as:
> 
> Station AA:BB:CC:DD:EE:FF (on wlan0)
>         inactive time:  212 ms
>         rx bytes:       10398
>         rx packets:     64
>         tx bytes:       4362
>         tx packets:     33
>         tx retries:     49
>         tx failed:      0
>         beacon loss:    0
>         beacon rx:      14
>         rx drop misc:   16
>         signal:         -45 [-51, -46] dBm
>         beacon signal avg:      -44 dBm
> 
> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4
> 
> Closes: https://bugzilla.kernel.org/show_bug.cgi?id=219751
> Signed-off-by: Lingbo Kong <lingbo.kong at oss.qualcomm.com>

Reviewed-by: Baochen Qiang <baochen.qiang at oss.qualcomm.com>