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

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Message-Id: <20250623-support_real_noise_floor-v2-0-974bbafa317e@oss.qualcomm.com>
Date: Mon, 23 Jun 2025 21:19:08 +0530
From: Aditya Kumar Singh <aditya.kumar.singh@....qualcomm.com>
To: 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>,
        Aditya Kumar Singh <aditya.kumar.singh@....qualcomm.com>
Subject: [PATCH ath-next v2 0/2] wifi: ath12k: use real noise floor value

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(-)
---
base-commit: e9efdcce074c55be396ca45add336121549bdcbc
change-id: 20250513-support_real_noise_floor-205986936cd3