linux-kernel - Re: [PATCH ath-next v2 0/2] wifi: ath12k: use real noise floor value

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Message-ID: <27c788ee-b12d-cfe6-3543-f320c4b7fd72@oss.qualcomm.com>
Date: Thu, 26 Jun 2025 22:28:51 +0530
From: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@....qualcomm.com>
To: Aditya Kumar Singh <aditya.kumar.singh@....qualcomm.com>,
        Jeff Johnson <jjohnson@...nel.org>
Cc: linux-wireless@...r.kernel.org, ath12k@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Raj Kumar Bhagat <quic_rajkbhag@...cinc.com>
Subject: Re: [PATCH ath-next v2 0/2] wifi: ath12k: use real noise floor value



On 6/23/2025 9:19 PM, Aditya Kumar Singh wrote:
> At present, the ATH12K_DEFAULT_NOISE_FLOOR (-95) is used to calculate RSSI
> value, providing an estimated noise floor value. Consequently, the RSSI
> value is also approximate. This works but however, using actual noise floor
> value will enable the reporting of the true RSSI value.
> 
> The firmware possesses the necessary data to determine the actual noise
> floor. This data is provided to the host via the WMI event
> WMI_PDEV_RSSI_DBM_CONVERSION_PARAMS_INFO_EVENTID, which includes the
> runtime parameters needed for calculating the real noise floor in dBm. This
> event is triggered by the firmware during channel changes, temperature
> offset adjustments, and hardware chainmask modifications.
> 
> Add support to handle and parse this WMI event. Use the received values to
> calculate and store the noise floor value and use at the required places.
> 
> ---
> Changes in v2:
> - Rebased to latest main. Simple conflict was only in wmi.h. No other changes.
> - Link to v1: https://lore.kernel.org/r/20250528-support_real_noise_floor-v1-0-04507bd3bc76@oss.qualcomm.com
> 
> ---
> Raj Kumar Bhagat (2):
>        wifi: ath12k: handle WMI event for real noise floor calculation
>        wifi: ath12k: use real noise floor instead of default value
> 
>   drivers/net/wireless/ath/ath12k/core.h   |  17 +++
>   drivers/net/wireless/ath/ath12k/dp_mon.c |   7 +-
>   drivers/net/wireless/ath/ath12k/dp_tx.c  |  20 ++-
>   drivers/net/wireless/ath/ath12k/mac.c    |  14 +-
>   drivers/net/wireless/ath/ath12k/wmi.c    | 233 ++++++++++++++++++++++++++++++-
>   drivers/net/wireless/ath/ath12k/wmi.h    |  42 ++++++
>   6 files changed, 324 insertions(+), 9 deletions(-)

Reviewed-by: Vasanthakumar Thiagarajan <vasanthakumar.thiagarajan@....qualcomm.com>