rtw88: restore DACK results to save time

DACK is done right after the hardware has been turned on, which
means it will be done every time we leave the IDLE state.
But it takes ~2 seconds to finish DACK.

We can back up the results and restore them. And it only takes a few
milliseconds to restore the results to the hardware, saving a lot of
time.
Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtw88/main.h

@@ -841,6 +841,9 @@ struct rtw_chip_info {
 	u32 rfe_defs_size;
 };
 
+#define DACK_MSBK_BACKUP_NUM	0xf
+#define DACK_DCK_BACKUP_NUM	0x2
+
 struct rtw_dm_info {
 	u32 cck_fa_cnt;
 	u32 ofdm_fa_cnt;
@@ -856,6 +859,11 @@ struct rtw_dm_info {
 
 	u8 cck_gi_u_bnd;
 	u8 cck_gi_l_bnd;
+
+	/* backup dack results for each path and I/Q */
+	u32 dack_adck[RTW_RF_PATH_MAX];
+	u16 dack_msbk[RTW_RF_PATH_MAX][2][DACK_MSBK_BACKUP_NUM];
+	u8 dack_dck[RTW_RF_PATH_MAX][2][DACK_DCK_BACKUP_NUM];
 };
 
 struct rtw_efuse {

drivers/net/wireless/realtek/rtw88/rtw8822c.h

@@ -152,6 +152,10 @@ struct rtw8822c_efuse {
 #define REG_RXAGCCTL0	0x18ac
 #define BITS_RXAGC_CCK		GENMASK(15, 12)
 #define BITS_RXAGC_OFDM		GENMASK(8, 4)
+#define REG_DCKA_I_0	0x18bc
+#define REG_DCKA_I_1	0x18c0
+#define REG_DCKA_Q_0	0x18d8
+#define REG_DCKA_Q_1	0x18dc
 #define REG_CCKSB	0x1a00
 #define REG_RXCCKSEL	0x1a04
 #define REG_BGCTRL	0x1a14
@@ -197,5 +201,9 @@ struct rtw8822c_efuse {
 #define REG_ORITXCODE2	0x4100
 #define REG_3WIRE2	0x410c
 #define REG_RXAGCCTL	0x41ac
+#define REG_DCKB_I_0	0x41bc
+#define REG_DCKB_I_1	0x41c0
+#define REG_DCKB_Q_0	0x41d8
+#define REG_DCKB_Q_1	0x41dc
 
 #endif