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wifi: rtw89: correct the DCFO tracking flow to improve CFO compensation

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DCFO tracking compensate the CFO (carrier frequency offset) by digital
hardware that provides fine CFO estimation. Although the avg_cfo which
is a coarse information becomes zero, still we need DCFO tracking to
compensate the residual CFO. However, the original flow skips the case
when avg_cfo is zero, so we fix it to have expected performance.

Signed-off-by: Cheng-Chieh Hsieh <cj.hsieh@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/20231016065115.751662-5-pkshih@realtek.com
This commit is contained in:
Cheng-Chieh Hsieh 2023-10-16 14:51:14 +08:00 committed by Kalle Valo
parent 5d2f3c3aaa
commit aecc60e7d3
1 changed files with 4 additions and 4 deletions
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8
drivers/net/wireless/realtek/rtw89/phy.c
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@ -2634,6 +2634,10 @@ static void rtw89_phy_cfo_crystal_cap_adjust(struct rtw89_dev *rtwdev,
s32 cfo_abs = abs(curr_cfo);
int sign;
if (curr_cfo == 0) {
rtw89_debug(rtwdev, RTW89_DBG_CFO, "curr_cfo=0\n");
return;
}
if (!cfo->is_adjust) {
if (cfo_abs > CFO_TRK_ENABLE_TH)
cfo->is_adjust = true;
@ -2830,10 +2834,6 @@ static void rtw89_phy_cfo_dm(struct rtw89_dev *rtwdev)
new_cfo = rtw89_phy_average_cfo_calc(rtwdev);
else
new_cfo = rtw89_phy_multi_sta_cfo_calc(rtwdev);
if (new_cfo == 0) {
rtw89_debug(rtwdev, RTW89_DBG_CFO, "curr_cfo=0\n");
return;
}
if (cfo->divergence_lock_en) {
cfo->lock_cnt++;
if (cfo->lock_cnt > CFO_PERIOD_CNT) {