wifi: rtw89: coex: Update BTG control related logic

BTG is a RF system type, it means Wi-Fi 2.4GHz and Bluetooth share RF gain
and antenna. The RF gain must control by Wi-Fi or Bluetooth in single side.
For example, if Bluetooth RX a very strong signal, then Bluetooth will
adjust to a lower gain. And Wi-Fi will also use the same gain to do RX,
then maybe the gain will not enough. This BTG control mechanism can do
some refine to this situation.
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://msgid.link/20231218061341.51255-5-pkshih@realtek.com

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

@@ -247,6 +247,11 @@ struct rtw89_btc_btf_set_mon_reg {
 	struct rtw89_btc_fbtc_mreg regs[] __counted_by(reg_num);
 } __packed;
 
+struct _wl_rinfo_now {
+	u8 link_mode;
+	u32 dbcc_2g_phy: 2;
+};
+
 enum btc_btf_set_cx_policy {
 	CXPOLICY_TDMA = 0x0,
 	CXPOLICY_SLOT = 0x1,
@@ -741,6 +746,7 @@ static void _reset_btc_var(struct rtw89_dev *rtwdev, u8 type)
 		btc->dm.wl_tx_limit.tx_time = BTC_MAX_TX_TIME_DEF;
 		btc->dm.wl_tx_limit.tx_retry = BTC_MAX_TX_RETRY_DEF;
 		btc->dm.wl_pre_agc_rb = BTC_PREAGC_NOTFOUND;
+		btc->dm.wl_btg_rx_rb = BTC_BTGCTRL_BB_GNT_NOTFOUND;
 	}
 
 	if (type & BTC_RESET_MDINFO)
@@ -1612,6 +1618,12 @@ static u32 _chk_btc_report(struct rtw89_dev *rtwdev,
 		}
 		break;
 	case BTC_RPT_TYPE_MREG:
+		_get_reg_status(rtwdev, BTC_CSTATUS_BB_GNT_MUX_MON, &val);
+		if (dm->wl_btg_rx == BTC_BTGCTRL_BB_GNT_FWCTRL)
+			dm->wl_btg_rx_rb = BTC_BTGCTRL_BB_GNT_FWCTRL;
+		else
+			dm->wl_btg_rx_rb = val;
+
 		_get_reg_status(rtwdev, BTC_CSTATUS_BB_PRE_AGC_MON, &val);
 		if (dm->wl_pre_agc == BTC_PREAGC_BB_FWCTRL)
 			dm->wl_pre_agc_rb = BTC_PREAGC_BB_FWCTRL;
@@ -3908,46 +3920,78 @@ static void _action_wl_rfk(struct rtw89_dev *rtwdev)
 static void _set_btg_ctrl(struct rtw89_dev *rtwdev)
 {
 	struct rtw89_btc *btc = &rtwdev->btc;
-	const struct rtw89_btc_ver *ver = btc->ver;
 	struct rtw89_btc_wl_info *wl = &btc->cx.wl;
-	struct rtw89_btc_wl_role_info *wl_rinfo = &wl->role_info;
 	struct rtw89_btc_wl_role_info_v1 *wl_rinfo_v1 = &wl->role_info_v1;
 	struct rtw89_btc_wl_role_info_v2 *wl_rinfo_v2 = &wl->role_info_v2;
+	struct rtw89_btc_wl_role_info *wl_rinfo_v0 = &wl->role_info;
 	struct rtw89_btc_wl_dbcc_info *wl_dinfo = &wl->dbcc_info;
-	bool is_btg;
-	u8 mode;
+	const struct rtw89_chip_info *chip = rtwdev->chip;
+	const struct rtw89_btc_ver *ver = btc->ver;
+	struct rtw89_btc_bt_info *bt = &btc->cx.bt;
+	struct rtw89_btc_dm *dm = &btc->dm;
+	struct _wl_rinfo_now wl_rinfo;
+	u32 run_reason = btc->dm.run_reason;
+	u32 is_btg;
+	u8 i, val;
 
 	if (btc->ctrl.manual)
 		return;
 
 	if (ver->fwlrole == 0)
-		mode = wl_rinfo->link_mode;
+		wl_rinfo.link_mode = wl_rinfo_v0->link_mode;
 	else if (ver->fwlrole == 1)
-		mode = wl_rinfo_v1->link_mode;
+		wl_rinfo.link_mode = wl_rinfo_v1->link_mode;
 	else if (ver->fwlrole == 2)
-		mode = wl_rinfo_v2->link_mode;
+		wl_rinfo.link_mode = wl_rinfo_v2->link_mode;
 	else
 		return;
 
-	/* notify halbb ignore GNT_BT or not for WL BB Rx-AGC control */
-	if (mode == BTC_WLINK_5G) /* always 0 if 5G */
-		is_btg = false;
-	else if (mode == BTC_WLINK_25G_DBCC &&
-		 wl_dinfo->real_band[RTW89_PHY_1] != RTW89_BAND_2G)
-		is_btg = false;
+	if (rtwdev->dbcc_en) {
+		if (ver->fwlrole == 0) {
+			for (i = 0; i < RTW89_PHY_MAX; i++) {
+				if (wl_dinfo->real_band[i] == RTW89_BAND_2G)
+					wl_rinfo.dbcc_2g_phy = i;
+			}
+		} else if (ver->fwlrole == 1) {
+			wl_rinfo.dbcc_2g_phy = wl_rinfo_v1->dbcc_2g_phy;
+		} else if (ver->fwlrole == 2) {
+			wl_rinfo.dbcc_2g_phy = wl_rinfo_v2->dbcc_2g_phy;
+		} else {
+			return;
+		}
+	}
+
+	if (wl_rinfo.link_mode == BTC_WLINK_25G_MCC)
+		is_btg = BTC_BTGCTRL_BB_GNT_FWCTRL;
+	else if (!(bt->run_patch_code && bt->enable.now))
+		is_btg = BTC_BTGCTRL_DISABLE;
+	else if (wl_rinfo.link_mode == BTC_WLINK_5G)
+		is_btg = BTC_BTGCTRL_DISABLE;
+	else if (dm->freerun)
+		is_btg = BTC_BTGCTRL_DISABLE;
+	else if (rtwdev->dbcc_en && wl_rinfo.dbcc_2g_phy != RTW89_PHY_1)
+		is_btg = BTC_BTGCTRL_DISABLE;
 	else
-		is_btg = true;
+		is_btg = BTC_BTGCTRL_ENABLE;
 
-	if (btc->dm.run_reason != BTC_RSN_NTFY_INIT &&
-	    is_btg == btc->dm.wl_btg_rx)
-		return;
+	if (dm->wl_btg_rx_rb != dm->wl_btg_rx &&
+	    dm->wl_btg_rx_rb != BTC_BTGCTRL_BB_GNT_NOTFOUND) {
+		_get_reg_status(rtwdev, BTC_CSTATUS_BB_GNT_MUX, &val);
+		dm->wl_btg_rx_rb = val;
+	}
 
-	btc->dm.wl_btg_rx = is_btg;
+	if (run_reason == BTC_RSN_NTFY_INIT ||
+	    run_reason == BTC_RSN_NTFY_SWBAND ||
+	    dm->wl_btg_rx_rb != dm->wl_btg_rx ||
+	    is_btg != dm->wl_btg_rx) {
 
-	if (mode == BTC_WLINK_25G_MCC)
-		return;
+		dm->wl_btg_rx = is_btg;
+
+		if (is_btg > BTC_BTGCTRL_ENABLE)
+			return;
 
-	rtw89_ctrl_btg_bt_rx(rtwdev, is_btg, RTW89_PHY_0);
+		chip->ops->ctrl_btg_bt_rx(rtwdev, is_btg, RTW89_PHY_0);
+	}
 }
 
 static void _set_wl_preagc_ctrl(struct rtw89_dev *rtwdev)
@@ -6226,6 +6270,13 @@ static void rtw89_btc_ntfy_wl_sta_iter(void *data, struct ieee80211_sta *sta)
 	dm->trx_info.tx_tp = link_info_t->tx_throughput;
 	dm->trx_info.rx_tp = link_info_t->rx_throughput;
 
+	/* Trigger coex-run if 0x10980 reg-value is diff with coex setup */
+	if ((dm->wl_btg_rx_rb != dm->wl_btg_rx &&
+	     dm->wl_btg_rx_rb != BTC_BTGCTRL_BB_GNT_NOTFOUND) ||
+	     (dm->wl_pre_agc_rb != dm->wl_pre_agc &&
+	      dm->wl_pre_agc_rb != BTC_PREAGC_NOTFOUND))
+		iter_data->is_sta_change = true;
+
 	if (is_sta_change)
 		iter_data->is_sta_change = true;
 

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

@@ -2506,11 +2506,13 @@ struct rtw89_btc_dm {
 	u32 noisy_level: 3;
 	u32 coex_info_map: 8;
 	u32 bt_only: 1;
-	u32 wl_btg_rx: 1;
+	u32 wl_btg_rx: 2;
 	u32 trx_para_level: 8;
 	u32 wl_stb_chg: 1;
 	u32 pta_owner: 1;
+
 	u32 tdma_instant_excute: 1;
+	u32 wl_btg_rx_rb: 2;
 
 	u16 slot_dur[CXST_MAX];