rtw89: 8852c: rfk: re-calibrate RX DCK once thermal changes a lot

RX DCK is receiver DC calibration. To keep good RF performance, do this
calibration again if the delta of thermal value from the last calibration
is more than 8.

Signed-off-by: Ping-Ke Shih <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

4 files changed, 34 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h
index e8a77225a90f..35619435ea0a 100644
--- a/drivers/net/wireless/realtek/rtw89/core.h
+++ b/drivers/net/wireless/realtek/rtw89/core.h
@@ -2646,6 +2646,10 @@ struct rtw89_lck_info {
 	u8 thermal[RF_PATH_MAX];
 };
 
+struct rtw89_rx_dck_info {
+	u8 thermal[RF_PATH_MAX];
+};
+
 struct rtw89_iqk_info {
 	bool lok_cor_fail[RTW89_IQK_CHS_NR][RTW89_IQK_PATH_NR];
 	bool lok_fin_fail[RTW89_IQK_CHS_NR][RTW89_IQK_PATH_NR];
@@ -3125,6 +3129,7 @@ struct rtw89_dev {
 	struct rtw89_dpk_info dpk;
 	struct rtw89_mcc_info mcc;
 	struct rtw89_lck_info lck;
+	struct rtw89_rx_dck_info rx_dck;
 	bool is_tssi_mode[RF_PATH_MAX];
 	bool is_bt_iqk_timeout;
 
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852c.c b/drivers/net/wireless/realtek/rtw89/rtw8852c.c
index 64840c8d9efe..b697aef2faf2 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852c.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852c.c
@@ -1861,6 +1861,7 @@ static void rtw8852c_rfk_track(struct rtw89_dev *rtwdev)
 {
 	rtw8852c_dpk_track(rtwdev);
 	rtw8852c_lck_track(rtwdev);
+	rtw8852c_rx_dck_track(rtwdev);
 }
 
 static u32 rtw8852c_bb_cal_txpwr_ref(struct rtw89_dev *rtwdev,
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.c b/drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.c
index dfb9caba9bc4..4186d825d19b 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.c
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.c
@@ -3864,6 +3864,7 @@ void rtw8852c_iqk(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy_idx)
 
 void rtw8852c_rx_dck(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy, bool is_afe)
 {
+	struct rtw89_rx_dck_info *rx_dck = &rtwdev->rx_dck;
 	u8 path, kpath;
 	u32 rf_reg5;
 
@@ -3883,6 +3884,7 @@ void rtw8852c_rx_dck(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy, bool is_a
 		rtw89_write_rf(rtwdev, path, RR_RSV1, RR_RSV1_RST, 0x0);
 		rtw89_write_rf(rtwdev, path, RR_MOD, RR_MOD_MASK, RR_MOD_V_RX);
 		_set_rx_dck(rtwdev, phy, path, is_afe);
+		rx_dck->thermal[path] = ewma_thermal_read(&rtwdev->phystat.avg_thermal[path]);
 		rtw89_write_rf(rtwdev, path, RR_RSV1, RFREG_MASK, rf_reg5);
 
 		if (rtwdev->is_tssi_mode[path])
@@ -3891,6 +3893,31 @@ void rtw8852c_rx_dck(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy, bool is_a
 	}
 }
 
+#define RTW8852C_RX_DCK_TH 8
+
+void rtw8852c_rx_dck_track(struct rtw89_dev *rtwdev)
+{
+	struct rtw89_rx_dck_info *rx_dck = &rtwdev->rx_dck;
+	u8 cur_thermal;
+	int delta;
+	int path;
+
+	for (path = 0; path < RF_PATH_NUM_8852C; path++) {
+		cur_thermal =
+			ewma_thermal_read(&rtwdev->phystat.avg_thermal[path]);
+		delta = abs((int)cur_thermal - rx_dck->thermal[path]);
+
+		rtw89_debug(rtwdev, RTW89_DBG_RFK_TRACK,
+			    "[RX_DCK] path=%d current thermal=0x%x delta=0x%x\n",
+			    path, cur_thermal, delta);
+
+		if (delta >= RTW8852C_RX_DCK_TH) {
+			rtw8852c_rx_dck(rtwdev, RTW89_PHY_0, false);
+			return;
+		}
+	}
+}
+
 void rtw8852c_dpk(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy_idx)
 {
 	u32 tx_en;
diff --git a/drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.h b/drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.h
index c32756f0c01a..5118a49da8d3 100644
--- a/drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.h
+++ b/drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.h
@@ -12,6 +12,7 @@ void rtw8852c_rck(struct rtw89_dev *rtwdev);
 void rtw8852c_dack(struct rtw89_dev *rtwdev);
 void rtw8852c_iqk(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy_idx);
 void rtw8852c_rx_dck(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy_idx, bool is_afe);
+void rtw8852c_rx_dck_track(struct rtw89_dev *rtwdev);
 void rtw8852c_dpk(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy);
 void rtw8852c_dpk_track(struct rtw89_dev *rtwdev);
 void rtw8852c_tssi(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy);