rtw89: 8852c: modify PCIE prebkf time

Prebkf time is to inform generating tx command if remaining backoff
time less than this setting value.
It might cause SER if generating tx command early in security mode.
Signed-off-by: Chia-Yuan Li <leo.li@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/20220704023453.19935-6-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/mac.c

@@ -1747,6 +1747,7 @@ static int scheduler_init(struct rtw89_dev *rtwdev, u8 mac_idx)
 {
 	u32 ret;
 	u32 reg;
+	u32 val;
 
 	ret = rtw89_mac_check_mac_en(rtwdev, mac_idx, RTW89_CMAC_SEL);
 	if (ret)
@@ -1764,7 +1765,16 @@ static int scheduler_init(struct rtw89_dev *rtwdev, u8 mac_idx)
 	rtw89_write32_clr(rtwdev, reg, B_AX_BTCCA_EN);
 
 	reg = rtw89_mac_reg_by_idx(R_AX_PREBKF_CFG_0, mac_idx);
-	rtw89_write32_mask(rtwdev, reg, B_AX_PREBKF_TIME_MASK, SCH_PREBKF_24US);
+	if (rtwdev->chip->chip_id == RTL8852C) {
+		val = rtw89_read32_mask(rtwdev, R_AX_SEC_ENG_CTRL,
+					B_AX_TX_PARTIAL_MODE);
+		if (!val)
+			rtw89_write32_mask(rtwdev, reg, B_AX_PREBKF_TIME_MASK,
+					   SCH_PREBKF_24US);
+	} else {
+		rtw89_write32_mask(rtwdev, reg, B_AX_PREBKF_TIME_MASK,
+				   SCH_PREBKF_24US);
+	}
 
 	return 0;
 }