From eee87f26203f8157ee4bdcba8151169598ea7d26 Mon Sep 17 00:00:00 2001
From: Yan-Hsuan Chuang <yhchuang@realtek.com>
Date: Thu, 11 May 2017 14:01:14 -0500
Subject: [PATCH] rtlwifi: btcoex: 21a 2ant: add pnp notidy to avoid LPS/IPS mismatch
Git-commit: eee87f26203f8157ee4bdcba8151169598ea7d26
Patch-mainline: v4.13-rc1
References: FATE#326906

When driver is going to sleep, it does not leave LPS/IPS, thus the
BTCoex may have mismatch when driver wakes up. To avoid that, BTCoex
needs to clear the IPS/LPS state when it receives a pnp notify, then
it can properly set up the hw when driver wakes up.

Routine ex_btc8821a2ant_pnp_notify() restored.

Signed-off-by: Yan-Hsuan Chuang <yhchuang@realtek.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
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>
Acked-by: Takashi Iwai <tiwai@suse.de>

---
 .../rtlwifi/btcoexist/halbtc8821a2ant.c        | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8821a2ant.c b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8821a2ant.c
index 9aa140a46d46..ca7649dca352 100644
--- a/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8821a2ant.c
+++ b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8821a2ant.c
@@ -4147,6 +4147,24 @@ void ex_btc8821a2ant_halt_notify(struct btc_coexist *btcoexist)
 	ex_btc8821a2ant_media_status_notify(btcoexist, BTC_MEDIA_DISCONNECT);
 }
 
+void ex_btc8821a2ant_pnp_notify(struct btc_coexist *btcoexist, u8 pnp_state)
+{
+	struct rtl_priv *rtlpriv = btcoexist->adapter;
+
+	RT_TRACE(rtlpriv, COMP_BT_COEXIST, DBG_LOUD, "[BTCoex], Pnp notify\n");
+
+	if (pnp_state == BTC_WIFI_PNP_SLEEP) {
+		RT_TRACE(rtlpriv, COMP_BT_COEXIST, DBG_LOUD,
+			 "[BTCoex], Pnp notify to SLEEP\n");
+	} else if (pnp_state == BTC_WIFI_PNP_WAKE_UP) {
+		RT_TRACE(rtlpriv, COMP_BT_COEXIST, DBG_LOUD,
+			 "[BTCoex], Pnp notify to WAKE UP\n");
+		ex_btc8821a2ant_init_hwconfig(btcoexist);
+		btc8821a2ant_init_coex_dm(btcoexist);
+		btc8821a2ant_query_bt_info(btcoexist);
+	}
+}
+
 void ex_btc8821a2ant_periodical(struct btc_coexist *btcoexist)
 {
 	struct rtl_priv *rtlpriv = btcoexist->adapter;
-- 
2.19.2