rtw88: coex: Add WLAN MIMO power saving for Bluetooth gaming controller

To keep high sensitivity reaction, Bluetooth gaming controller will send
packet very frequently, it will make WLAN performance very poor. To solve
this situation, MIMO PS mechanism makes WLAN/BT own an antenna itself, WLAN
quits 2SS performance but it can get a stable 1SS performance and Bluetooth
gaming controller can keep sensitivity reaction at the same time.
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/20220215004855.4098-5-pkshih@realtek.com

drivers/net/wireless/realtek/rtw88/coex.c

@@ -211,6 +211,10 @@ static void rtw_coex_wl_ccklock_detect(struct rtw_dev *rtwdev)
 
 	bool is_cck_lock_rate = false;
 
+	if (coex_stat->wl_coex_mode != COEX_WLINK_2G1PORT &&
+	    coex_stat->wl_coex_mode != COEX_WLINK_2GFREE)
+		return;
+
 	if (coex_dm->bt_status == COEX_BTSTATUS_INQ_PAGE ||
 	    coex_stat->bt_setup_link) {
 		coex_stat->wl_cck_lock = false;
@@ -803,7 +807,9 @@ static void rtw_coex_update_bt_link_info(struct rtw_dev *rtwdev)
 static void rtw_coex_update_wl_ch_info(struct rtw_dev *rtwdev, u8 type)
 {
 	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_efuse *efuse = &rtwdev->efuse;
 	struct rtw_coex_dm *coex_dm = &rtwdev->coex.dm;
+	struct rtw_coex_stat *coex_stat = &rtwdev->coex.stat;
 	u8 link = 0;
 	u8 center_chan = 0;
 	u8 bw;
@@ -814,7 +820,9 @@ static void rtw_coex_update_wl_ch_info(struct rtw_dev *rtwdev, u8 type)
 	if (type != COEX_MEDIA_DISCONNECT)
 		center_chan = rtwdev->hal.current_channel;
 
-	if (center_chan == 0) {
+	if (center_chan == 0 ||
+	    (efuse->share_ant && center_chan <= 14 &&
+	     coex_stat->wl_coex_mode != COEX_WLINK_2GFREE)) {
 		link = 0;
 		center_chan = 0;
 		bw = 0;
@@ -953,6 +961,23 @@ static void rtw_coex_set_gnt_wl(struct rtw_dev *rtwdev, u8 state)
 	rtw_coex_write_indirect_reg(rtwdev, LTE_COEX_CTRL, 0x0300, state);
 }
 
+static void rtw_coex_mimo_ps(struct rtw_dev *rtwdev, bool force, bool state)
+{
+	struct rtw_coex_stat *coex_stat = &rtwdev->coex.stat;
+
+	if (!force && state == coex_stat->wl_mimo_ps)
+		return;
+
+	coex_stat->wl_mimo_ps = state;
+
+	rtw_set_txrx_1ss(rtwdev, state);
+
+	rtw_coex_update_wl_ch_info(rtwdev, (u8)coex_stat->wl_connected);
+
+	rtw_dbg(rtwdev, RTW_DBG_COEX,
+		"[BTCoex], %s(): state = %d\n", __func__, state);
+}
+
 static void rtw_btc_wltoggle_table_a(struct rtw_dev *rtwdev, bool force,
 				     u8 table_case)
 {
@@ -1129,7 +1154,8 @@ static void rtw_coex_set_tdma(struct rtw_dev *rtwdev, u8 byte1, u8 byte2,
 
 		ps_type = COEX_PS_WIFI_NATIVE;
 		rtw_coex_power_save_state(rtwdev, ps_type, 0x0, 0x0);
-	} else if (byte1 & BIT(4) && !(byte1 & BIT(5))) {
+	} else if ((byte1 & BIT(4) && !(byte1 & BIT(5))) ||
+		   coex_stat->wl_coex_mode == COEX_WLINK_2GFREE) {
 		rtw_dbg(rtwdev, RTW_DBG_COEX,
 			"[BTCoex], %s(): Force LPS (byte1 = 0x%x)\n", __func__,
 			byte1);
@@ -1825,6 +1851,54 @@ static void rtw_coex_action_bt_inquiry(struct rtw_dev *rtwdev)
 	rtw_coex_tdma(rtwdev, false, tdma_case | slot_type);
 }
 
+static void rtw_coex_action_bt_game_hid(struct rtw_dev *rtwdev)
+{
+	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
+	struct rtw_efuse *efuse = &rtwdev->efuse;
+	struct rtw_coex_dm *coex_dm = &coex->dm;
+	struct rtw_chip_info *chip = rtwdev->chip;
+	u8 table_case, tdma_case;
+
+	rtw_dbg(rtwdev, RTW_DBG_COEX, "[BTCoex], %s()\n", __func__);
+	rtw_coex_set_ant_path(rtwdev, false, COEX_SET_ANT_2G);
+
+	if (efuse->share_ant) {
+		coex_stat->wl_coex_mode = COEX_WLINK_2GFREE;
+		if (coex_stat->bt_whck_test)
+			table_case = 2;
+		else if (coex_stat->wl_linkscan_proc || coex_stat->bt_hid_exist)
+			table_case = 33;
+		else if (coex_stat->bt_setup_link || coex_stat->bt_inq_page)
+			table_case = 0;
+		else if (coex_stat->bt_a2dp_exist)
+			table_case = 34;
+		else
+			table_case = 33;
+
+		tdma_case = 0;
+	} else {
+		if (COEX_RSSI_HIGH(coex_dm->wl_rssi_state[1]))
+			tdma_case = 112;
+		else
+			tdma_case = 113;
+
+		table_case = 121;
+	}
+
+	if (coex_stat->wl_coex_mode == COEX_WLINK_2GFREE) {
+		if (coex_stat->wl_tput_dir == COEX_WL_TPUT_TX)
+			rtw_coex_set_rf_para(rtwdev, chip->wl_rf_para_tx[6]);
+		else
+			rtw_coex_set_rf_para(rtwdev, chip->wl_rf_para_rx[5]);
+	} else {
+		rtw_coex_set_rf_para(rtwdev, chip->wl_rf_para_rx[0]);
+	}
+
+	rtw_coex_table(rtwdev, false, table_case);
+	rtw_coex_tdma(rtwdev, false, tdma_case);
+}
+
 static void rtw_coex_action_bt_hfp(struct rtw_dev *rtwdev)
 {
 	struct rtw_coex *coex = &rtwdev->coex;
@@ -2242,8 +2316,10 @@ static void rtw_coex_action_bt_a2dp_pan_hid(struct rtw_dev *rtwdev)
 
 static void rtw_coex_action_wl_under5g(struct rtw_dev *rtwdev)
 {
+	struct rtw_coex *coex = &rtwdev->coex;
 	struct rtw_efuse *efuse = &rtwdev->efuse;
 	struct rtw_chip_info *chip = rtwdev->chip;
+	struct rtw_coex_stat *coex_stat = &coex->stat;
 	u8 table_case, tdma_case;
 
 	rtw_dbg(rtwdev, RTW_DBG_COEX, "[BTCoex], %s()\n", __func__);
@@ -2253,6 +2329,9 @@ static void rtw_coex_action_wl_under5g(struct rtw_dev *rtwdev)
 
 	rtw_coex_write_scbd(rtwdev, COEX_SCBD_FIX2M, false);
 
+	if (coex_stat->bt_game_hid_exist && coex_stat->wl_linkscan_proc)
+		coex_stat->wl_coex_mode = COEX_WLINK_2GFREE;
+
 	if (efuse->share_ant) {
 		/* Shared-Ant */
 		table_case = 0;
@@ -2440,6 +2519,7 @@ static void rtw_coex_action_wl_connected(struct rtw_dev *rtwdev)
 static void rtw_coex_run_coex(struct rtw_dev *rtwdev, u8 reason)
 {
 	struct rtw_coex *coex = &rtwdev->coex;
+	struct rtw_chip_info *chip = rtwdev->chip;
 	struct rtw_coex_dm *coex_dm = &coex->dm;
 	struct rtw_coex_stat *coex_stat = &coex->stat;
 	bool rf4ce_en = false;
@@ -2512,6 +2592,11 @@ static void rtw_coex_run_coex(struct rtw_dev *rtwdev, u8 reason)
 		goto exit;
 	}
 
+	if (coex_stat->bt_game_hid_exist && coex_stat->wl_connected) {
+		rtw_coex_action_bt_game_hid(rtwdev);
+		goto exit;
+	}
+
 	if (coex_stat->bt_whck_test) {
 		rtw_coex_action_bt_whql_test(rtwdev);
 		goto exit;
@@ -2548,6 +2633,18 @@ static void rtw_coex_run_coex(struct rtw_dev *rtwdev, u8 reason)
 	}
 
 exit:
+
+	if (chip->wl_mimo_ps_support) {
+		if (coex_stat->wl_coex_mode == COEX_WLINK_2GFREE) {
+			if (coex_dm->reason == COEX_RSN_2GMEDIA)
+				rtw_coex_mimo_ps(rtwdev, true, true);
+			else
+				rtw_coex_mimo_ps(rtwdev, false, true);
+		} else {
+			rtw_coex_mimo_ps(rtwdev, false, false);
+		}
+	}
+
 	rtw_coex_gnt_workaround(rtwdev, false, coex_stat->wl_coex_mode);
 	rtw_coex_limited_wl(rtwdev);
 }
@@ -3152,6 +3249,17 @@ void rtw_coex_bt_info_notify(struct rtw_dev *rtwdev, u8 *buf, u8 length)
 		coex_stat->bt_a2dp_bitpool = 0;
 
 	coex_stat->bt_a2dp_sink = ((coex_stat->bt_info_hb3 & BIT(7)) == BIT(7));
+	if (chip->wl_mimo_ps_support && !coex_stat->bt_inq_page) {
+		if ((coex_stat->bt_info_lb2 & COEX_INFO_CONNECTION) &&
+		    (coex_stat->hi_pri_tx + coex_stat->hi_pri_rx >
+		     COEX_BT_GAMEHID_CNT) && !coex_stat->bt_slave) {
+			coex_stat->bt_game_hid_exist = true;
+			rtw_dbg(rtwdev, RTW_DBG_COEX,
+				"[BTCoex], BT game controller exisit!!\n");
+		} else {
+			coex_stat->bt_game_hid_exist = false;
+		}
+	}
 
 	rtw_coex_update_bt_link_info(rtwdev);
 	rtw_coex_run_coex(rtwdev, COEX_RSN_BTINFO);
@@ -3666,6 +3774,7 @@ static const char *rtw_coex_get_wl_coex_mode(u8 coex_wl_link_mode)
 	switch (coex_wl_link_mode) {
 	case_WLINK(2G1PORT);
 	case_WLINK(5G);
+	case_WLINK(2GFREE);
 	default:
 		return "Unknown";
 	}

drivers/net/wireless/realtek/rtw88/coex.h

@@ -11,6 +11,7 @@
 
 #define COEX_MIN_DELAY		10 /* delay unit in ms */
 #define COEX_RFK_TIMEOUT	600 /* RFK timeout in ms */
+#define COEX_BT_GAMEHID_CNT	800
 
 #define COEX_RF_OFF	0x0
 #define COEX_RF_ON	0x1
@@ -172,6 +173,7 @@ enum coex_bt_profile {
 enum coex_wl_link_mode {
 	COEX_WLINK_2G1PORT	= 0x0,
 	COEX_WLINK_5G		= 0x3,
+	COEX_WLINK_2GFREE	= 0x7,
 	COEX_WLINK_MAX
 };
 

drivers/net/wireless/realtek/rtw88/main.h

@@ -1242,6 +1242,7 @@ struct rtw_chip_info {
 	bool scbd_support;
 	bool new_scbd10_def; /* true: fix 2M(8822c) */
 	bool ble_hid_profile_support;
+	bool wl_mimo_ps_support;
 	u8 pstdma_type; /* 0: LPSoff, 1:LPSon */
 	u8 bt_rssi_type;
 	u8 ant_isolation;
@@ -1384,6 +1385,7 @@ struct rtw_coex_stat {
 	bool bt_slave;
 	bool bt_418_hid_exist;
 	bool bt_ble_hid_exist;
+	bool bt_game_hid_exist;
 	bool bt_mailbox_reply;
 
 	bool wl_under_lps;
@@ -1404,6 +1406,7 @@ struct rtw_coex_stat {
 	bool wl_connecting;
 	bool wl_slot_toggle;
 	bool wl_slot_toggle_change; /* if toggle to no-toggle */
+	bool wl_mimo_ps;
 
 	u32 bt_supported_version;
 	u32 bt_supported_feature;

drivers/net/wireless/realtek/rtw88/rtw8723d.c

@@ -2753,6 +2753,7 @@ struct rtw_chip_info rtw8723d_hw_spec = {
 	.scbd_support = true,
 	.new_scbd10_def = true,
 	.ble_hid_profile_support = false,
+	.wl_mimo_ps_support = false,
 	.pstdma_type = COEX_PSTDMA_FORCE_LPSOFF,
 	.bt_rssi_type = COEX_BTRSSI_RATIO,
 	.ant_isolation = 15,

drivers/net/wireless/realtek/rtw88/rtw8821c.c

@@ -1925,6 +1925,7 @@ struct rtw_chip_info rtw8821c_hw_spec = {
 	.scbd_support = true,
 	.new_scbd10_def = false,
 	.ble_hid_profile_support = false,
+	.wl_mimo_ps_support = false,
 	.pstdma_type = COEX_PSTDMA_FORCE_LPSOFF,
 	.bt_rssi_type = COEX_BTRSSI_RATIO,
 	.ant_isolation = 15,

drivers/net/wireless/realtek/rtw88/rtw8822b.c

@@ -2554,6 +2554,7 @@ struct rtw_chip_info rtw8822b_hw_spec = {
 	.scbd_support = true,
 	.new_scbd10_def = false,
 	.ble_hid_profile_support = false,
+	.wl_mimo_ps_support = false,
 	.pstdma_type = COEX_PSTDMA_FORCE_LPSOFF,
 	.bt_rssi_type = COEX_BTRSSI_RATIO,
 	.ant_isolation = 15,

drivers/net/wireless/realtek/rtw88/rtw8822c.c

@@ -2996,19 +2996,34 @@ static void rtw8822c_coex_cfg_gnt_fix(struct rtw_dev *rtwdev)
 	 * enable "DAC off if GNT_WL = 0" for non-shared-antenna
 	 * disable 0x1c30[22] = 0,
 	 * enable: 0x1c30[22] = 1, 0x1c38[12] = 0, 0x1c38[28] = 1
-	 *
-	 * disable WL-S1 BB chage RF mode if GNT_BT
+	 */
+	if (coex_stat->wl_coex_mode == COEX_WLINK_2GFREE) {
+		rtw_write8_mask(rtwdev, REG_ANAPAR + 2,
+				BIT_ANAPAR_BTPS >> 16, 0);
+	} else {
+		rtw_write8_mask(rtwdev, REG_ANAPAR + 2,
+				BIT_ANAPAR_BTPS >> 16, 1);
+		rtw_write8_mask(rtwdev, REG_RSTB_SEL + 1,
+				BIT_DAC_OFF_ENABLE, 0);
+		rtw_write8_mask(rtwdev, REG_RSTB_SEL + 3,
+				BIT_DAC_OFF_ENABLE, 1);
+	}
+
+	/* disable WL-S1 BB chage RF mode if GNT_BT
 	 * since RF TRx mask can do it
 	 */
-	rtw_write8_mask(rtwdev, REG_ANAPAR + 2, BIT_ANAPAR_BTPS >> 16, 1);
-	rtw_write8_mask(rtwdev, REG_RSTB_SEL + 1, BIT_DAC_OFF_ENABLE, 0);
-	rtw_write8_mask(rtwdev, REG_RSTB_SEL + 3, BIT_DAC_OFF_ENABLE, 1);
-	rtw_write8_mask(rtwdev, REG_IGN_GNTBT4, BIT_PI_IGNORE_GNT_BT, 1);
+	rtw_write8_mask(rtwdev, REG_IGN_GNTBT4,
+			BIT_PI_IGNORE_GNT_BT, 1);
 
 	/* disable WL-S0 BB chage RF mode if wifi is at 5G,
 	 * or antenna path is separated
 	 */
-	if (coex_stat->wl_coex_mode == COEX_WLINK_5G ||
+	if (coex_stat->wl_coex_mode == COEX_WLINK_2GFREE) {
+		rtw_write8_mask(rtwdev, REG_IGN_GNT_BT1,
+				BIT_PI_IGNORE_GNT_BT, 1);
+		rtw_write8_mask(rtwdev, REG_NOMASK_TXBT,
+				BIT_NOMASK_TXBT_ENABLE, 1);
+	} else if (coex_stat->wl_coex_mode == COEX_WLINK_5G ||
 	    coex->under_5g || !efuse->share_ant) {
 		if (coex_stat->kt_ver >= 3) {
 			rtw_write8_mask(rtwdev, REG_IGN_GNT_BT1,
@@ -5008,6 +5023,8 @@ static const struct coex_table_para table_sant_8822c[] = {
 	{0x66556aaa, 0x6a5a6aaa}, /*case-30*/
 	{0xffffffff, 0x5aaa5aaa},
 	{0x56555555, 0x5a5a5aaa},
+	{0xdaffdaff, 0xdaffdaff},
+	{0xddffddff, 0xddffddff},
 };
 
 /* Non-Shared-Antenna Coex Table */
@@ -5108,7 +5125,8 @@ static const struct coex_rf_para rf_para_tx_8822c[] = {
 	{8, 17, true, 4},
 	{7, 18, true, 4},
 	{6, 19, true, 4},
-	{5, 20, true, 4}
+	{5, 20, true, 4},
+	{0, 21, true, 4}   /* for gamg hid */
 };
 
 static const struct coex_rf_para rf_para_rx_8822c[] = {
@@ -5117,7 +5135,8 @@ static const struct coex_rf_para rf_para_rx_8822c[] = {
 	{3, 24, true, 5},
 	{2, 26, true, 5},
 	{1, 27, true, 5},
-	{0, 28, true, 5}
+	{0, 28, true, 5},
+	{0, 28, true, 5}   /* for gamg hid */
 };
 
 static_assert(ARRAY_SIZE(rf_para_tx_8822c) == ARRAY_SIZE(rf_para_rx_8822c));
@@ -5360,6 +5379,7 @@ struct rtw_chip_info rtw8822c_hw_spec = {
 	.scbd_support = true,
 	.new_scbd10_def = true,
 	.ble_hid_profile_support = true,
+	.wl_mimo_ps_support = true,
 	.pstdma_type = COEX_PSTDMA_FORCE_LPSOFF,
 	.bt_rssi_type = COEX_BTRSSI_DBM,
 	.ant_isolation = 15,