[PATCH v2 2/2] wifi: ath12k: add get_txpower mac ops

[Mahendran P]

On 2/3/2025 11:34 AM, Mahendran P wrote:
> On 2/1/2025 1:07 AM, Rameshkumar Sundaram wrote:
>> From: Aditya Kumar Singh <aditya.kumar.singh at oss.qualcomm.com>
>>
>> Driver does not support get_txpower mac ops because of which
>> cfg80211 returns vif->bss_conf.txpower to user space. bss_conf.txpower
>> gets its value from ieee80211_channel->max_reg_power. However, the final
>> txpower is dependent on few other parameters apart from max regulatory
>> supported power. It is the firmware which knows about all these
>> parameters and considers the minimum for each packet transmission.
>>
>> All ath12k firmware reports the final TX power in firmware pdev stats
>> which falls under fw_stats. add get_txpower mac ops to get the TX power
>> from firmware leveraging fw_stats and return it accordingly.
>>
>> While at it, there is a possibility that repeated stats request WMI
>> commands are queued to FW if mac80211/userspace does get tx power back
>> to back(in Multiple BSS cases). This could potentially consume the WMI
>> queue completely. Hence limit this by fetching the power only for every
>> 5 seconds and reusing the value until the refresh timeout or when there
>> is a change in channel.
>>
>> Also remove init_completion(&ar->fw_stats_complete) in
>> ath12k_mac_hw_register() as ath12k_fw_stats_init() takes care of
>> it for each ar.
>>
>> Tested-on: QCN9274 hw2.0 PCI WLAN.WBE.1.3.1-00173-QCAHKSWPL_SILICONZ-1
>> Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0.c5-00481-QCAHMTSWPL_V1.0_V2.0_SILICONZ-3
>>
>> Signed-off-by: Aditya Kumar Singh <aditya.kumar.singh at oss.qualcomm.com>
>> Signed-off-by: Rameshkumar Sundaram <rameshkumar.sundaram at oss.qualcomm.com>

Reviewed-by: Mahendran P <quic_mahep at quicinc.com>