FAILED: patch "[PATCH] rtlwifi: btcoex: 23b 2ant: let bt transmit when hw" failed to apply to 4.9-stable tree

[<gregkh@linuxfoundation.org>]

The patch below does not apply to the 4.9-stable tree.
If someone wants it applied there, or to any other stable or longterm
tree, then please email the backport, including the original git commit
id to <stable@vger.kernel.org>.

thanks,

greg k-h

------------------ original commit in Linus's tree ------------------

>From bcd37f4a0831fb4f3f7e1c9c7baccdf3d97b7064 Mon Sep 17 00:00:00 2001
From: Yan-Hsuan Chuang <yhchuang@realtek.com>
Date: Tue, 4 Apr 2017 11:50:03 -0500
Subject: [PATCH] rtlwifi: btcoex: 23b 2ant: let bt transmit when hw
 initialisation done

During hw initialisation, wifi may be ready after bt has already been
ready, which causes bt to act abnormally. To avoid this, set GNT_BT to
high during hw init.

Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Cc: Stable <stable@vger.kernel.org>
Cc: Pkshih <pkshih@realtek.com>
Cc: Birming Chiu <birming@realtek.com>
Cc: Shaofu <shaofu@realtek.com>
Cc: Steven Ting <steventing@realtek.com>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8723b2ant.c b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8723b2ant.c
index ec95f0097dfc..16a4a5c4f024 100644
--- a/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8723b2ant.c
+++ b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8723b2ant.c
@@ -1083,12 +1083,7 @@ static void btc8723b2ant_set_ant_path(struct btc_coexist *btcoexist,
 		use_ext_switch = true;
 
 	if (init_hwcfg) {
-		/* 0x4c[23] = 0, 0x4c[24] = 1  Antenna control by WL/BT */
-		u32tmp = btcoexist->btc_read_4byte(btcoexist, 0x4c);
-		u32tmp &= ~BIT23;
-		u32tmp |= BIT24;
-		btcoexist->btc_write_4byte(btcoexist, 0x4c, u32tmp);
-
+		btcoexist->btc_write_1byte_bitmask(btcoexist, 0x39, 0x8, 0x1);
 		btcoexist->btc_write_1byte(btcoexist, 0x974, 0xff);
 		btcoexist->btc_write_1byte_bitmask(btcoexist, 0x944, 0x3, 0x3);
 		btcoexist->btc_write_1byte(btcoexist, 0x930, 0x77);
@@ -1103,6 +1098,12 @@ static void btc8723b2ant_set_ant_path(struct btc_coexist *btcoexist,
 			btcoexist->btc_write_1byte(btcoexist, 0x765, 0x18);
 		}
 
+		btcoexist->btc_write_4byte(btcoexist, 0x948, 0x0);
+
+		/* WiFi TRx Mask off */
+		btcoexist->btc_set_rf_reg(btcoexist, BTC_RF_A,
+					  0x1, 0xfffff, 0x0);
+
 		if (board_info->btdm_ant_pos == BTC_ANTENNA_AT_MAIN_PORT) {
 			/* tell firmware "no antenna inverse" */
 			h2c_parameter[0] = 0;
@@ -1125,17 +1126,23 @@ static void btc8723b2ant_set_ant_path(struct btc_coexist *btcoexist,
 			h2c_parameter[0] = 0;
 			btcoexist->btc_fill_h2c(btcoexist, 0x6E, 1,
 						h2c_parameter);
-			btcoexist->btc_write_2byte(btcoexist, 0x948, 0x280);
+		} else {
+			btcoexist->btc_write_1byte(btcoexist, 0x765, 0x0);
 		}
 	}
 
 	/* ext switch setting */
 	if (use_ext_switch) {
+		if (init_hwcfg) {
+			/* 0x4c[23] = 0, 0x4c[24] = 1 Ant controlled by WL/BT */
+			u32tmp = btcoexist->btc_read_4byte(btcoexist, 0x4c);
+			u32tmp &= ~BIT23;
+			u32tmp |= BIT24;
+			btcoexist->btc_write_4byte(btcoexist, 0x4c, u32tmp);
+		}
+
 		/* fixed internal switch S1->WiFi, S0->BT */
-		if (board_info->btdm_ant_pos == BTC_ANTENNA_AT_MAIN_PORT)
-			btcoexist->btc_write_2byte(btcoexist, 0x948, 0x0);
-		else
-			btcoexist->btc_write_2byte(btcoexist, 0x948, 0x280);
+		btcoexist->btc_write_4byte(btcoexist, 0x948, 0x0);
 
 		switch (antpos_type) {
 		case BTC_ANT_WIFI_AT_MAIN:
@@ -1149,9 +1156,18 @@ static void btc8723b2ant_set_ant_path(struct btc_coexist *btcoexist,
 							   0x92c, 0x3, 0x2);
 			break;
 		}
-	} else {	/* internal switch */
-		/* fixed ext switch */
-		btcoexist->btc_write_1byte_bitmask(btcoexist, 0x92c, 0x3, 0x1);
+	} else {
+		/* internal switch */
+		if (init_hwcfg) {
+			/* 0x4c[23] = 0, 0x4c[24] = 1 Ant controlled by WL/BT */
+			u32tmp = btcoexist->btc_read_4byte(btcoexist, 0x4c);
+			u32tmp |= BIT23;
+			u32tmp &= ~BIT24;
+			btcoexist->btc_write_4byte(btcoexist, 0x4c, u32tmp);
+		}
+
+		/* fixed ext switch, S1->Main, S0->Aux */
+		btcoexist->btc_write_1byte_bitmask(btcoexist, 0x64, 0x1, 0x0);
 		switch (antpos_type) {
 		case BTC_ANT_WIFI_AT_MAIN:
 			/* fixed internal switch S1->WiFi, S0->BT */
@@ -1458,6 +1474,7 @@ static void btc8723b2ant_coex_alloff(struct btc_coexist *btcoexist)
 static void btc8723b2ant_init_coex_dm(struct btc_coexist *btcoexist)
 {
 	/* force to reset coex mechanism*/
+	btc8723b2ant_coex_table_with_type(btcoexist, NORMAL_EXEC, 0);
 	btc8723b2ant_power_save_state(btcoexist, BTC_PS_WIFI_NATIVE, 0x0, 0x0);
 
 	btc8723b2ant_ps_tdma(btcoexist, FORCE_EXEC, false, 1);