[PATCH 3/4] wifi: rtw89: coex: Update function to get BT RSSI and hardware counter

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

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

Correct Bluetooth RSSI count method. The 6dB is the gap between hardware
packet sampled value and real RSSI value.

Signed-off-by: Ching-Te Ku <ku920601@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw89/rtw8852a.c | 3 ++-
 drivers/net/wireless/realtek/rtw89/rtw8852b.c | 3 ++-
 drivers/net/wireless/realtek/rtw89/rtw8852c.c | 3 ++-
 3 files changed, 6 insertions(+), 3 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852a.c b/drivers/net/wireless/realtek/rtw89/rtw8852a.c
index 46907748778bd..a0c02ff39e750 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852a.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852a.c
@@ -1827,7 +1827,8 @@ rtw8852a_btc_set_wl_txpwr_ctrl(struct rtw89_dev *rtwdev, u32 txpwr_val)
 static
 s8 rtw8852a_btc_get_bt_rssi(struct rtw89_dev *rtwdev, s8 val)
 {
-	return clamp_t(s8, val, -100, 0) + 100;
+	/* +6 for compensate offset */
+	return clamp_t(s8, val + 6, -100, 0) + 100;
 }
 
 static struct rtw89_btc_rf_trx_para rtw89_btc_8852a_rf_ul[] = {
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852b.c b/drivers/net/wireless/realtek/rtw89/rtw8852b.c
index a7f69d105fbbc..4cbe4c277a73f 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852b.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852b.c
@@ -2269,7 +2269,8 @@ do {								\
 static
 s8 rtw8852b_btc_get_bt_rssi(struct rtw89_dev *rtwdev, s8 val)
 {
-	return clamp_t(s8, val, -100, 0) + 100;
+	/* +6 for compensate offset */
+	return clamp_t(s8, val + 6, -100, 0) + 100;
 }
 
 static
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852c.c b/drivers/net/wireless/realtek/rtw89/rtw8852c.c
index 1db1298ca9863..4b66ed0cb3bbe 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852c.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852c.c
@@ -2527,7 +2527,8 @@ do {								\
 static
 s8 rtw8852c_btc_get_bt_rssi(struct rtw89_dev *rtwdev, s8 val)
 {
-	return clamp_t(s8, val, -100, 0) + 100;
+	/* +6 for compensate offset */
+	return clamp_t(s8, val + 6, -100, 0) + 100;
 }
 
 static const struct rtw89_btc_rf_trx_para rtw89_btc_8852c_rf_ul[] = {
-- 
2.25.1