rtlwifi: btcoexist: Fix antenna selection code

In commit 87d8a9f35202 ("rtlwifi: btcoex: call bind to setup btcoex"),
the code turns on a call to exhalbtc_bind_bt_coex_withadapter(). This
routine contains a bug that causes incorrect antenna selection for those
HP laptops with only one antenna and an incorrectly programmed EFUSE.
These boxes are the ones that need the ant_sel module parameter.

Fixes: 87d8a9f35202 ("rtlwifi: btcoex: call bind to setup btcoex")
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Ping-Ke Shih <pkshih@realtek.com>
Cc: Yan-Hsuan Chuang <yhchuang@realtek.com>
Cc: Birming Chiu <birming@realtek.com>
Cc: Shaofu <shaofu@realtek.com>
Cc: Steven Ting <steventing@realtek.com>
Cc: Stable <stable@vger.kernel.org> # 4.13+
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

diff --git a/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.c b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.c
index c1eacd8..b5e9877 100644 (file)
--- a/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.c
+++ b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtcoutsrc.c
@@ -173,6 +173,16 @@ static u8 halbtc_get_wifi_central_chnl(struct btc_coexist *btcoexist)
 
 u8 rtl_get_hwpg_single_ant_path(struct rtl_priv *rtlpriv)
 {
+       struct rtl_mod_params *mod_params = rtlpriv->cfg->mod_params;
+
+       /* override ant_num / ant_path */
+       if (mod_params->ant_sel) {
+               rtlpriv->btcoexist.btc_info.ant_num =
+                       (mod_params->ant_sel == 1 ? ANT_X2 : ANT_X1);
+
+               rtlpriv->btcoexist.btc_info.single_ant_path =
+                       (mod_params->ant_sel == 1 ? 0 : 1);
+       }
        return rtlpriv->btcoexist.btc_info.single_ant_path;
 }
 
@@ -183,6 +193,7 @@ u8 rtl_get_hwpg_bt_type(struct rtl_priv *rtlpriv)
 
 u8 rtl_get_hwpg_ant_num(struct rtl_priv *rtlpriv)
 {
+       struct rtl_mod_params *mod_params = rtlpriv->cfg->mod_params;
        u8 num;
 
        if (rtlpriv->btcoexist.btc_info.ant_num == ANT_X2)
@@ -190,6 +201,10 @@ u8 rtl_get_hwpg_ant_num(struct rtl_priv *rtlpriv)
        else
                num = 1;
 
+       /* override ant_num / ant_path */
+       if (mod_params->ant_sel)
+               num = (mod_params->ant_sel == 1 ? ANT_X2 : ANT_X1) + 1;
+
        return num;
 }
 
@@ -876,7 +891,7 @@ bool exhalbtc_bind_bt_coex_withadapter(void *adapter)
 {
        struct btc_coexist *btcoexist = &gl_bt_coexist;
        struct rtl_priv *rtlpriv = adapter;
-       u8 ant_num = 2, chip_type, single_ant_path = 0;
+       u8 ant_num = 2, chip_type;
 
        if (btcoexist->binded)
                return false;
@@ -911,12 +926,6 @@ bool exhalbtc_bind_bt_coex_withadapter(void *adapter)
        ant_num = rtl_get_hwpg_ant_num(rtlpriv);
        exhalbtc_set_ant_num(rtlpriv, BT_COEX_ANT_TYPE_PG, ant_num);
 
-       /* set default antenna position to main  port */
-       btcoexist->board_info.btdm_ant_pos = BTC_ANTENNA_AT_MAIN_PORT;
-
-       single_ant_path = rtl_get_hwpg_single_ant_path(rtlpriv);
-       exhalbtc_set_single_ant_path(single_ant_path);
-
        if (rtl_get_hwpg_package_type(rtlpriv) == 0)
                btcoexist->board_info.tfbga_package = false;
        else if (rtl_get_hwpg_package_type(rtlpriv) == 1)