rtlwifi: btcoex: 21a 2ant: monitor if bt is slave or not

We monitor the packet counter to guess if the bt is slave or not, and
when bt is slave, it may receive packet at any time, so we will have to
take care about it

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>

diff --git a/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8821a2ant.c b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8821a2ant.c
index 3e671d409e61eb716b90392517e14d43e5e36684..7f685a02d8659d732e44caf98bbc585c3ab8246d 100644 (file)
--- a/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8821a2ant.c
+++ b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8821a2ant.c
@@ -268,6 +268,7 @@ void btc8821a2ant_limited_rx(struct btc_coexist *btcoexist, bool force_exec,
 static void btc8821a2ant_monitor_bt_ctr(struct btc_coexist *btcoexist)
 {
        struct rtl_priv *rtlpriv = btcoexist->adapter;
+       struct btc_bt_link_info *bt_link_info = &btcoexist->bt_link_info;
        u32 reg_hp_txrx, reg_lp_txrx, u4tmp;
        u32 reg_hp_tx = 0, reg_hp_rx = 0, reg_lp_tx = 0, reg_lp_rx = 0;
 
@@ -287,6 +288,13 @@ static void btc8821a2ant_monitor_bt_ctr(struct btc_coexist *btcoexist)
        coex_sta->low_priority_tx = reg_lp_tx;
        coex_sta->low_priority_rx = reg_lp_rx;
 
+       if ((coex_sta->low_priority_rx >= 950) &&
+           (coex_sta->low_priority_rx >= coex_sta->low_priority_tx) &&
+           (!coex_sta->under_ips))
+               bt_link_info->slave_role = true;
+       else
+               bt_link_info->slave_role = false;
+
        RT_TRACE(rtlpriv, COMP_BT_COEXIST, DBG_LOUD,
                 "[BTCoex], High Priority Tx/Rx (reg 0x%x) = 0x%x(%d)/0x%x(%d)\n",
                    reg_hp_txrx, reg_hp_tx, reg_hp_tx, reg_hp_rx, reg_hp_rx);