wifi: rtw89: coex: Add LPS protocol radio state for RTL8852B

This LPS state will not turn off RF, and it can still do some basic
traffic, only RTL8852B has the state. Coexistence need let Bluetooth
know WiFi is still alive to prevent some Bluetooth performance issue.
Signed-off-by: Ching-Te Ku <ku920601@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/20230314020617.28193-2-pkshih@realtek.com

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

@@ -5728,6 +5728,11 @@ void rtw89_btc_ntfy_radio_state(struct rtw89_dev *rtwdev, enum btc_rfctrl rf_sta
 		wl->status.map.lps = BTC_LPS_RF_OFF;
 		wl->status.map.busy = 0;
 		break;
+	case BTC_RFCTRL_LPS_WL_ON: /* LPS-Protocol (RFon) */
+		wl->status.map.rf_off = 0;
+		wl->status.map.lps = BTC_LPS_RF_ON;
+		wl->status.map.busy = 0;
+		break;
 	case BTC_RFCTRL_WL_ON:
 	default:
 		wl->status.map.rf_off = 0;
@@ -5745,6 +5750,9 @@ void rtw89_btc_ntfy_radio_state(struct rtw89_dev *rtwdev, enum btc_rfctrl rf_sta
 		rtw89_btc_fw_en_rpt(rtwdev, RPT_EN_ALL, false);
 		if (rf_state == BTC_RFCTRL_WL_OFF)
 			_write_scbd(rtwdev, BTC_WSCB_ALL, false);
+		else if (rf_state == BTC_RFCTRL_LPS_WL_ON &&
+			 wl->status.map.lps_pre != BTC_LPS_OFF)
+			_update_bt_scbd(rtwdev, true);
 	}
 
 	btc->dm.cnt_dm[BTC_DCNT_BTCNT_HANG] = 0;
@@ -5755,7 +5763,7 @@ void rtw89_btc_ntfy_radio_state(struct rtw89_dev *rtwdev, enum btc_rfctrl rf_sta
 		btc->dm.tdma_instant_excute = 0;
 
 	_run_coex(rtwdev, BTC_RSN_NTFY_RADIO_STATE);
-
+	btc->dm.tdma_instant_excute = 0;
 	wl->status.map.rf_off_pre = wl->status.map.rf_off;
 	wl->status.map.lps_pre = wl->status.map.lps;
 }

drivers/net/wireless/realtek/rtw89/coex.h

@@ -131,6 +131,7 @@ enum btc_role_state {
 enum btc_rfctrl {
 	BTC_RFCTRL_WL_OFF,
 	BTC_RFCTRL_WL_ON,
+	BTC_RFCTRL_LPS_WL_ON,
 	BTC_RFCTRL_FW_CTRL,
 	BTC_RFCTRL_MAX
 };