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From:   Wen Gong <quic_wgong@quicinc.com>
To:     <ath12k@lists.infradead.org>
CC:     <linux-wireless@vger.kernel.org>, <kvalo@kernel.org>,
        <quic_jjohnson@quicinc.com>, <quic_wgong@quicinc.com>
Subject: [PATCH] wifi: ath12k: enable IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS for WCN7850
Date:   Wed, 13 Sep 2023 06:55:07 -0400
Message-ID: <20230913105507.17675-1-quic_wgong@quicinc.com>
MIME-Version: 1.0
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Currently mac80211 will send 3 scan request for each scan of WCN7850, they
are 2.4 GHz/5 GHz/6 GHz band scan. Firmware of WCN7850 will cache the RNR
IE(Reduced Neighbor Report element) which exist in the beacon of 2.4 GHz/5
GHz of the AP which is co-located with 6 GHz, and then use the cache to
scan in 6 GHz band scan if the 6 GHz scan is in the same scan with the 2.4
GHz/5 GHz band, this will helpful to search more AP of 6 GHz. Also it will
decrease the time cost of scan because firmware will use dual-band scan
for the 2.4 GHz/5 GHz, it means the 2.4 GHz and 5 GHz scans are doing
simultaneously.

Set the flag IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS for WCN7850 since it
supports 2.4 GHz/5 GHz/6 GHz in a single wiphy/ieee80211_hw.

This does not impact QCN9274, because it is not single_phy, so does not
have 2.4 GHz/5 GHz/6 GHz in the same wiphy, then it does not match the
condition and then IEEE80211_HW_SINGLE_SCAN_ON_ALL_BANDS will not set for
QCN9274.

Tested-on: WCN7850 hw2.0 PCI WLAN.HMT.1.0-03427-QCAHMTSWPL_V1.0_V2.0_SILICONZ-1.15378.4

Signed-off-by: Wen Gong <quic_wgong@quicinc.com>
---
 drivers/net/wireless/ath/ath12k/mac.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/drivers/net/wireless/ath/ath12k/mac.c b/drivers/net/wireless/ath/ath12k/mac.c
index 0f2af2f14ef7..d4dc03dc8d11 100644
--- a/drivers/net/wireless/ath/ath12k/mac.c
+++ b/drivers/net/wireless/ath/ath12k/mac.c
@@ -7232,6 +7232,11 @@ static int __ath12k_mac_register(struct ath12k *ar)
 
 	ar->hw->wiphy->interface_modes = ab->hw_params->interface_modes;
 
+	if (ar->hw->wiphy->bands[NL80211_BAND_2GHZ] &&
+	    ar->hw->wiphy->bands[NL80211_BAND_5GHZ] &&
+	    ar->hw->wiphy->bands[NL80211_BAND_6GHZ])
+		ieee80211_hw_set(ar->hw, SINGLE_SCAN_ON_ALL_BANDS);
+
 	ieee80211_hw_set(ar->hw, SIGNAL_DBM);
 	ieee80211_hw_set(ar->hw, SUPPORTS_PS);
 	ieee80211_hw_set(ar->hw, SUPPORTS_DYNAMIC_PS);

base-commit: 3f257461ab0ab19806bae2bfde4c3cd88dbf050e
-- 
2.40.1