[PATCH rtw-next 08/15] wifi: rtw89: coex: raise default BT TX power to 10 dBm

[Ping-Ke Shih <pkshih@realtek.com>]

From: Ching-Te Ku <ku920601@realtek.com>

The TDD/FDD switch threshold is derived as the WL RSSI at which a BT
device's TX power, after antenna isolation, starts to interfere:
110 + bt_pin - ant_iso - sir_thres, in RSSI percent. Before the first
BT TX power report arrives, and on any link whose report never
arrives, bt_pin falls back to the BR/LE defaults, so those defaults
decide where coexistence flips between TDD and FDD.

Both defaults were 4 dBm, which places the threshold about 6 dB below
what the BT side actually transmits at, so the driver stays in FDD
well past the point where BT TX already interferes with WL RX. Raise
both to 10 dBm, which matches the BT TX power these designs report
once their first query completes.

The 8922A ext-SOC path already used a separate 10 dBm define for the
same reason; drop it now that the common default carries that value.

Signed-off-by: Ching-Te Ku <ku920601@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/core.h     | 5 ++---
 drivers/net/wireless/realtek/rtw89/rtw8922a.c | 2 +-
 2 files changed, 3 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h
index 624b8d1b4742..b1f92c1d0428 100644
--- a/drivers/net/wireless/realtek/rtw89/core.h
+++ b/drivers/net/wireless/realtek/rtw89/core.h
@@ -2656,10 +2656,9 @@ enum rtw89_btc_bt_func_type {
 
 #define RTW89_BTC_BTC_SCAN_V1_FLAG_ENABLE BIT(0)
 #define RTW89_BTC_BTC_SCAN_V1_FLAG_INTERLACE BIT(1)
-#define RTW89_BTC_BT_DEF_BR_TX_PWR 4
-#define RTW89_BTC_BT_DEF_LE_TX_PWR 4
+#define RTW89_BTC_BT_DEF_BR_TX_PWR 10 /* in dBm */
+#define RTW89_BTC_BT_DEF_LE_TX_PWR 10
 #define RTW89_BTC_DEFAULT_ANISO 10
-#define RTW89_BTC_BT_DEF_LE_TX_PWR_1 10
 
 struct rtw89_btc_bt_scan_info_v1 {
 	__le16 win;
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8922a.c b/drivers/net/wireless/realtek/rtw89/rtw8922a.c
index 6402bd4f06aa..e48300287697 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8922a.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8922a.c
@@ -2796,7 +2796,7 @@ static void rtw8922a_btc_set_rfe(struct rtw89_dev *rtwdev)
 	default:
 	case BTC_ESOC_NONE:
 		memset(&btc->cx.bt_ext, 0, sizeof(struct rtw89_btc_extsoc_info));
-		btc->cx.bt_ext.max_tx_pwr = RTW89_BTC_BT_DEF_LE_TX_PWR_1;
+		btc->cx.bt_ext.max_tx_pwr = RTW89_BTC_BT_DEF_LE_TX_PWR;
 		btc->cx.bt_ext.ant_iso_to_wl = RTW89_BTC_DEFAULT_ANISO;
 		break;
 	case BTC_ESOC_8771:
-- 
2.25.1