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wifi: rtw89: add RSSI based antenna diversity

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RSSI statistics are grouped by CCK, OFDM or non-legacy rate. These
statistics will be collected in training state for both (main/aux)
antenna. There is a time period (ANTDIV_DELAY) for rate adaptive
settle down before start collect statistics when switch antenna.

Antenna diversity checks packet count from training state for each
group and use the most one as the final RSSI for comparison, and
then choose the better one as target antenna.

Signed-off-by: Eric Huang <echuang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Kalle Valo <kvalo@kernel.org>
Link: https://lore.kernel.org/r/20230418012820.5139-7-pkshih@realtek.com
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Eric Huang 2023-04-18 09:28:19 +08:00 • committed by Kalle Valo
commit e3715859c7
4 changed files with 214 additions and 0 deletions
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