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wifi: rtw89: adjust DIG threshold to reduce false alarm

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Use RSSI without subtracting offset as packet detection lower bound and
set an absolute minimal threshold. It's equivalent to setting a higher
noise floor, thereby reducing false alarm and improving interference
endurance.

Signed-off-by: Eric Huang <echuang@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20240828055217.10263-2-pkshih@realtek.com
This commit is contained in:
Eric Huang
2024-08-28 13:52:16 +08:00
committed by Ping-Ke Shih
parent 30ce797d46
commit 9ecb64ed07
1 changed files with 18 additions and 9 deletions
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drivers/net/wireless/realtek/rtw89/phy.c
+18 -9
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@@ -5401,7 +5401,7 @@ static void rtw89_phy_dig_update_para(struct rtw89_dev *rtwdev)
memcpy(dig->igi_rssi_th, igi_rssi_th, sizeof(dig->igi_rssi_th));
}
static const u8 pd_low_th_offset = 20, dynamic_igi_min = 0x20;
static const u8 pd_low_th_offset = 16, dynamic_igi_min = 0x20;
static const u8 igi_max_performance_mode = 0x5a;
static const u8 dynamic_pd_threshold_max;
@@ -5699,38 +5699,47 @@ void rtw89_phy_dig_reset(struct rtw89_dev *rtwdev)
}
#define IGI_RSSI_MIN 10
#define ABS_IGI_MIN 0xc
void rtw89_phy_dig(struct rtw89_dev *rtwdev)
{
struct rtw89_dig_info *dig = &rtwdev->dig;
bool is_linked = rtwdev->total_sta_assoc > 0;
u8 igi_min;
if (unlikely(dig->bypass_dig)) {
dig->bypass_dig = false;
return;
}
rtw89_phy_dig_update_rssi_info(rtwdev);
if (!dig->is_linked_pre && is_linked) {
rtw89_debug(rtwdev, RTW89_DBG_DIG, "First connected\n");
rtw89_phy_dig_update_para(rtwdev);
dig->igi_fa_rssi = dig->igi_rssi;
} else if (dig->is_linked_pre && !is_linked) {
rtw89_debug(rtwdev, RTW89_DBG_DIG, "First disconnected\n");
rtw89_phy_dig_update_para(rtwdev);
dig->igi_fa_rssi = dig->igi_rssi;
}
dig->is_linked_pre = is_linked;
rtw89_phy_dig_igi_offset_by_env(rtwdev);
rtw89_phy_dig_update_rssi_info(rtwdev);
dig->dyn_igi_min = (dig->igi_rssi > IGI_RSSI_MIN) ?
dig->igi_rssi - IGI_RSSI_MIN : 0;
dig->dyn_igi_max = dig->dyn_igi_min + IGI_OFFSET_MAX;
dig->igi_fa_rssi = dig->dyn_igi_min + dig->fa_rssi_ofst;
igi_min = max_t(int, dig->igi_rssi - IGI_RSSI_MIN, 0);
dig->dyn_igi_max = min(igi_min + IGI_OFFSET_MAX, igi_max_performance_mode);
dig->dyn_igi_min = max(igi_min, ABS_IGI_MIN);
dig->igi_fa_rssi = clamp(dig->igi_fa_rssi, dig->dyn_igi_min,
dig->dyn_igi_max);
if (dig->dyn_igi_max >= dig->dyn_igi_min) {
dig->igi_fa_rssi += dig->fa_rssi_ofst;
dig->igi_fa_rssi = clamp(dig->igi_fa_rssi, dig->dyn_igi_min,
dig->dyn_igi_max);
} else {
dig->igi_fa_rssi = dig->dyn_igi_max;
}
rtw89_debug(rtwdev, RTW89_DBG_DIG,
"rssi=%03d, dyn(max,min)=(%d,%d), final_rssi=%d\n",
"rssi=%03d, dyn_joint(max,min)=(%d,%d), final_rssi=%d\n",
dig->igi_rssi, dig->dyn_igi_max, dig->dyn_igi_min,
dig->igi_fa_rssi);