wifi: rtw89: 52c: rfk: disable DPK during MCC

DPK is one kind of RF calibration. When MCC (multi-channel concurrency)
start/stop, DPK needs to do extra things to be off/on. We add a chanctx
callback type, RTW89_CHANCTX_CALLBACK_RFK, and register it for RTL8852C
to deal with DPK according to MCC states.
Signed-off-by: Zong-Zhe Yang <kevin_yang@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/20230908031145.20931-4-pkshih@realtek.com

drivers/net/wireless/realtek/rtw89/core.h

@@ -3429,6 +3429,7 @@ enum rtw89_chanctx_state {
 
 enum rtw89_chanctx_callbacks {
 	RTW89_CHANCTX_CALLBACK_PLACEHOLDER,
+	RTW89_CHANCTX_CALLBACK_RFK,
 
 	NUM_OF_RTW89_CHANCTX_CALLBACKS,
 };

drivers/net/wireless/realtek/rtw89/rtw8852c.c

@@ -2,6 +2,7 @@
 /* Copyright(c) 2019-2022  Realtek Corporation
  */
 
+#include "chan.h"
 #include "coex.h"
 #include "debug.h"
 #include "fw.h"
@@ -1776,6 +1777,7 @@ static void rtw8852c_rfk_init(struct rtw89_dev *rtwdev)
 	rtwdev->is_tssi_mode[RF_PATH_B] = false;
 	memset(rfk_mcc, 0, sizeof(*rfk_mcc));
 	rtw8852c_lck_init(rtwdev);
+	rtw8852c_dpk_init(rtwdev);
 
 	rtw8852c_rck(rtwdev);
 	rtw8852c_dack(rtwdev);
@@ -2748,6 +2750,10 @@ static int rtw8852c_mac_disable_bb_rf(struct rtw89_dev *rtwdev)
 	return 0;
 }
 
+static const struct rtw89_chanctx_listener rtw8852c_chanctx_listener = {
+	.callbacks[RTW89_CHANCTX_CALLBACK_RFK] = rtw8852c_rfk_chanctx_cb,
+};
+
 #ifdef CONFIG_PM
 static const struct wiphy_wowlan_support rtw_wowlan_stub_8852c = {
 	.flags = WIPHY_WOWLAN_MAGIC_PKT | WIPHY_WOWLAN_DISCONNECT,
@@ -2841,6 +2847,7 @@ const struct rtw89_chip_info rtw8852c_chip_info = {
 	.byr_table		= &rtw89_8852c_byr_table,
 	.dflt_parms		= &rtw89_8852c_dflt_parms,
 	.rfe_parms_conf		= NULL,
+	.chanctx_listener	= &rtw8852c_chanctx_listener,
 	.txpwr_factor_rf	= 2,
 	.txpwr_factor_mac	= 1,
 	.dig_table		= NULL,

drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.c

@@ -4265,6 +4265,14 @@ void rtw8852c_rx_dck_track(struct rtw89_dev *rtwdev)
 	rtw89_btc_ntfy_wl_rfk(rtwdev, phy_map, BTC_WRFKT_RXDCK, BTC_WRFK_STOP);
 }
 
+void rtw8852c_dpk_init(struct rtw89_dev *rtwdev)
+{
+	struct rtw89_dpk_info *dpk = &rtwdev->dpk;
+
+	dpk->is_dpk_enable = true;
+	dpk->is_dpk_reload_en = false;
+}
+
 void rtw8852c_dpk(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy_idx)
 {
 	u32 tx_en;
@@ -4274,8 +4282,6 @@ void rtw8852c_dpk(struct rtw89_dev *rtwdev, enum rtw89_phy_idx phy_idx)
 	rtw89_chip_stop_sch_tx(rtwdev, phy_idx, &tx_en, RTW89_SCH_TX_SEL_ALL);
 	_wait_rx_mode(rtwdev, _kpath(rtwdev, phy_idx));
 
-	rtwdev->dpk.is_dpk_enable = true;
-	rtwdev->dpk.is_dpk_reload_en = false;
 	_dpk(rtwdev, phy_idx, false);
 
 	rtw89_chip_resume_sch_tx(rtwdev, phy_idx, tx_en);
@@ -4413,3 +4419,26 @@ void rtw8852c_wifi_scan_notify(struct rtw89_dev *rtwdev,
 	else
 		rtw8852c_tssi_default_txagc(rtwdev, phy_idx, false);
 }
+
+void rtw8852c_rfk_chanctx_cb(struct rtw89_dev *rtwdev,
+			     enum rtw89_chanctx_state state)
+{
+	struct rtw89_dpk_info *dpk = &rtwdev->dpk;
+	u8 path;
+
+	switch (state) {
+	case RTW89_CHANCTX_STATE_MCC_START:
+		dpk->is_dpk_enable = false;
+		for (path = 0; path < RTW8852C_DPK_RF_PATH; path++)
+			_dpk_onoff(rtwdev, path, false);
+		break;
+	case RTW89_CHANCTX_STATE_MCC_STOP:
+		dpk->is_dpk_enable = true;
+		for (path = 0; path < RTW8852C_DPK_RF_PATH; path++)
+			_dpk_onoff(rtwdev, path, false);
+		rtw8852c_dpk(rtwdev, RTW89_PHY_0);
+		break;
+	default:
+		break;
+	}
+}

drivers/net/wireless/realtek/rtw89/rtw8852c_rfk.h

@@ -13,6 +13,7 @@ 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_init(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);
@@ -25,5 +26,7 @@ void rtw8852c_set_channel_rf(struct rtw89_dev *rtwdev,
 			     enum rtw89_phy_idx phy_idx);
 void rtw8852c_lck_init(struct rtw89_dev *rtwdev);
 void rtw8852c_lck_track(struct rtw89_dev *rtwdev);
+void rtw8852c_rfk_chanctx_cb(struct rtw89_dev *rtwdev,
+			     enum rtw89_chanctx_state state);
 
 #endif