wifi: rtw89: coex: set the WL/BT antenna map on shared-antenna chips

The WL/BT space-interaction map that decides whether a WL RF-path and a
BT take a TDD or an FDD action is built from the antenna-division map
with the cross-talk map. A WL RF-path that physically shares its
antenna with a BT must be marked in the antenna-division map, otherwise
it is only ever marked interacting when the measured WL RSSI happens to
fall below the BT Tx interference threshold, and a shared-antenna design
with a strong WL signal gets bound to FDD where it has to coexist in
time instead.

Chips with a single BT never filled that map, so fill it from the RFE
type that the antenna configuration is already derived from: mark the
one WL RF-path that carries the BTG circuit as sharing with the only BT
whenever the antenna type is shared, and leave the map clear for the
dedicated-antenna RFE types where the BT has an antenna of its own. The
second-BT and external-coexistence columns stay clear because these
designs have neither.

This is driver-internal state only. The coex init information these
chips send to firmware has no antenna-map field, so what reaches the
firmware is unchanged.

Signed-off-by: Ching-Te Ku <ku920601@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/20261004034520.33695-12-pkshih@realtek.com

5 files changed, 26 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtw89/rtw8851b.c b/drivers/net/wireless/realtek/rtw89/rtw8851b.c
index db37ad6653bc..272f4f4e1fb9 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8851b.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8851b.c
@@ -2119,6 +2119,7 @@ static u8 rtw8851b_get_thermal(struct rtw89_dev *rtwdev, enum rtw89_rf_path rf_p
 static void rtw8851b_btc_set_rfe(struct rtw89_dev *rtwdev)
 {
 	struct rtw89_btc_module *md = &rtwdev->btc.mdinfo;
+	struct rtw89_btc_dm *dm = &rtwdev->btc.dm;
 
 	md->rfe_type = rtwdev->efuse.rfe_type;
 	md->kt_ver = rtwdev->hal.cv;
@@ -2127,6 +2128,8 @@ static void rtw8851b_btc_set_rfe(struct rtw89_dev *rtwdev)
 	md->ant.isolation = 10;
 	md->kt_ver_adie = rtwdev->hal.acv;
 
+	memset(dm->ant_xmap, 0, sizeof(dm->ant_xmap));
+
 	if (md->rfe_type == 0)
 		return;
 
@@ -2145,6 +2148,8 @@ static void rtw8851b_btc_set_rfe(struct rtw89_dev *rtwdev)
 		md->bt0_pos = BTC_BT_BTG;
 		md->wa_type = 1;
 		md->ant.diversity = 0;
+		/* the only BT shares the BTG antenna with WL path A */
+		dm->ant_xmap[BTC_RF_S0][BTC_BT_1ST] = 1;
 	} else { /* ant.num == 2 */
 		md->ant.type = BTC_ANT_DEDICATED;
 		md->bt0_pos = BTC_BT_ALONE;
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852a.c b/drivers/net/wireless/realtek/rtw89/rtw8852a.c
index 4b364f039464..5207df4f9cd5 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852a.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852a.c
@@ -1836,6 +1836,7 @@ static u8 rtw8852a_get_thermal(struct rtw89_dev *rtwdev, enum rtw89_rf_path rf_p
 static void rtw8852a_btc_set_rfe(struct rtw89_dev *rtwdev)
 {
 	struct rtw89_btc_module *md = &rtwdev->btc.mdinfo;
+	struct rtw89_btc_dm *dm = &rtwdev->btc.dm;
 
 	md->rfe_type = rtwdev->efuse.rfe_type;
 	md->kt_ver = rtwdev->hal.cv;
@@ -1850,12 +1851,16 @@ static void rtw8852a_btc_set_rfe(struct rtw89_dev *rtwdev)
 	md->ant.diversity = 0;
 	md->ant.isolation = 10;
 
+	memset(dm->ant_xmap, 0, sizeof(dm->ant_xmap));
+
 	if (md->ant.num == 3) {
 		md->ant.type = BTC_ANT_DEDICATED;
 		md->bt0_pos = BTC_BT_ALONE;
 	} else {
 		md->ant.type = BTC_ANT_SHARED;
 		md->bt0_pos = BTC_BT_BTG;
+		/* the only BT shares the BTG antenna with WL path B */
+		dm->ant_xmap[BTC_RF_S1][BTC_BT_1ST] = 1;
 	}
 	rtwdev->btc.btg_pos = md->ant.btg_pos;
 	rtwdev->btc.ant_type = md->ant.type;
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852b.c b/drivers/net/wireless/realtek/rtw89/rtw8852b.c
index c3c53a6b8119..060c99532936 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852b.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852b.c
@@ -748,6 +748,7 @@ static void rtw8852b_rfk_track(struct rtw89_dev *rtwdev)
 static void rtw8852b_btc_set_rfe(struct rtw89_dev *rtwdev)
 {
 	struct rtw89_btc_module *md = &rtwdev->btc.mdinfo;
+	struct rtw89_btc_dm *dm = &rtwdev->btc.dm;
 
 	md->rfe_type = rtwdev->efuse.rfe_type;
 	md->kt_ver = rtwdev->hal.cv;
@@ -762,12 +763,16 @@ static void rtw8852b_btc_set_rfe(struct rtw89_dev *rtwdev)
 	md->ant.diversity = 0;
 	md->ant.isolation = 10;
 
+	memset(dm->ant_xmap, 0, sizeof(dm->ant_xmap));
+
 	if (md->ant.num == 3) {
 		md->ant.type = BTC_ANT_DEDICATED;
 		md->bt0_pos = BTC_BT_ALONE;
 	} else {
 		md->ant.type = BTC_ANT_SHARED;
 		md->bt0_pos = BTC_BT_BTG;
+		/* the only BT shares the BTG antenna with WL path B */
+		dm->ant_xmap[BTC_RF_S1][BTC_BT_1ST] = 1;
 	}
 	rtwdev->btc.btg_pos = md->ant.btg_pos;
 	rtwdev->btc.ant_type = md->ant.type;
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852bt.c b/drivers/net/wireless/realtek/rtw89/rtw8852bt.c
index 3d93cee562c2..23ad02d1fcd4 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852bt.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852bt.c
@@ -636,6 +636,7 @@ static void rtw8852bt_rfk_track(struct rtw89_dev *rtwdev)
 static void rtw8852bt_btc_set_rfe(struct rtw89_dev *rtwdev)
 {
 	struct rtw89_btc_module *md = &rtwdev->btc.mdinfo;
+	struct rtw89_btc_dm *dm = &rtwdev->btc.dm;
 
 	md->rfe_type = rtwdev->efuse.rfe_type;
 	md->kt_ver = rtwdev->hal.cv;
@@ -653,6 +654,10 @@ static void rtw8852bt_btc_set_rfe(struct rtw89_dev *rtwdev)
 	md->ant.single_pos = RF_PATH_A;
 	md->ant.btg_pos = RF_PATH_B;
 
+	memset(dm->ant_xmap, 0, sizeof(dm->ant_xmap));
+	/* the only BT shares the BTG antenna with WL path B */
+	dm->ant_xmap[BTC_RF_S1][BTC_BT_1ST] = 1;
+
 	if (md->rfe_type == 0) {
 		rtwdev->btc.dm.error.map.rfe_type0 = true;
 		return;
@@ -669,6 +674,7 @@ static void rtw8852bt_btc_set_rfe(struct rtw89_dev *rtwdev)
 	} else {
 		md->ant.type = BTC_ANT_DEDICATED;
 		md->bt0_pos = BTC_BT_ALONE;
+		dm->ant_xmap[BTC_RF_S1][BTC_BT_1ST] = 0;
 	}
 }
 
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852c.c b/drivers/net/wireless/realtek/rtw89/rtw8852c.c
index 624f23b3f2a1..e556ba0c14a7 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852c.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852c.c
@@ -2609,6 +2609,7 @@ static u8 rtw8852c_get_thermal(struct rtw89_dev *rtwdev, enum rtw89_rf_path rf_p
 static void rtw8852c_btc_set_rfe(struct rtw89_dev *rtwdev)
 {
 	struct rtw89_btc_module *md = &rtwdev->btc.mdinfo;
+	struct rtw89_btc_dm *dm = &rtwdev->btc.dm;
 
 	md->rfe_type = rtwdev->efuse.rfe_type;
 	md->kt_ver = rtwdev->hal.cv;
@@ -2623,12 +2624,16 @@ static void rtw8852c_btc_set_rfe(struct rtw89_dev *rtwdev)
 	md->ant.diversity = 0;
 	md->ant.isolation = 10;
 
+	memset(dm->ant_xmap, 0, sizeof(dm->ant_xmap));
+
 	if (md->ant.num == 3) {
 		md->ant.type = BTC_ANT_DEDICATED;
 		md->bt0_pos = BTC_BT_ALONE;
 	} else {
 		md->ant.type = BTC_ANT_SHARED;
 		md->bt0_pos = BTC_BT_BTG;
+		/* the only BT shares the BTG antenna with WL path B */
+		dm->ant_xmap[BTC_RF_S1][BTC_BT_1ST] = 1;
 	}
 	rtwdev->btc.btg_pos = md->ant.btg_pos;
 	rtwdev->btc.ant_type = md->ant.type;