rtlwifi: btcoex: 23b 1ant: TDMA duration for ACL busy

BT ACL is a special case, so we create a routine to deal this case.

Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Larry Finger <Larry.Finger@lwfinger.net>
Cc: Yan-Hsuan Chuang <yhchuang@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/halbtc8723b1ant.c b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8723b1ant.c
index 2e1ba8f..523e1ac 100644 (file)
--- a/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8723b1ant.c
+++ b/drivers/net/wireless/realtek/rtlwifi/btcoexist/halbtc8723b1ant.c
@@ -1124,6 +1124,11 @@ void btc8723b1ant_tdma_dur_adj_for_acl(struct btc_coexist *btcoexist,
                /* acquire the BT TRx retry count from BT_Info byte2 */
                retry_count = coex_sta->bt_retry_cnt;
                bt_info_ext = coex_sta->bt_info_ext;
+
+               if ((coex_sta->low_priority_tx) > 1050 ||
+                   (coex_sta->low_priority_rx) > 1250)
+                       retry_count++;
+
                result = 0;
                wait_count++;
                /* no retry in the last 2-second duration */
@@ -1135,6 +1140,9 @@ void btc8723b1ant_tdma_dur_adj_for_acl(struct btc_coexist *btcoexist,
                                dn = 0;
 
                        if (up >= n) {
+                               /* if retry count during continuous n*2 seconds
+                                * is 0, enlarge WiFi duration
+                                */
                                wait_count = 0;
                                n = 3;
                                up = 0;
@@ -1144,6 +1152,7 @@ void btc8723b1ant_tdma_dur_adj_for_acl(struct btc_coexist *btcoexist,
                                         "[BTCoex], Increase wifi duration!!\n");
                        }
                } else if (retry_count <= 3) {
+                       /* <=3 retry in the last 2-second duration */
                        up--;
                        dn++;
 
@@ -1151,12 +1160,20 @@ void btc8723b1ant_tdma_dur_adj_for_acl(struct btc_coexist *btcoexist,
                                up = 0;
 
                        if (dn == 2) {
+                               /* if continuous 2 retry count(every 2 seconds)
+                                * >0 and < 3, reduce WiFi duration
+                                */
                                if (wait_count <= 2)
+                                       /* avoid loop between the two levels */
                                        m++;
                                else
                                        m = 1;
 
                                if (m >= 20)
+                                       /* maximum of m = 20 ' will recheck if
+                                        * need to adjust wifi duration in
+                                        * maximum time interval 120 seconds
+                                        */
                                        m = 20;
 
                                n = 3 * m;
@@ -1168,12 +1185,20 @@ void btc8723b1ant_tdma_dur_adj_for_acl(struct btc_coexist *btcoexist,
                                         "[BTCoex], Decrease wifi duration for retryCounter<3!!\n");
                        }
                } else {
+                       /* retry count > 3, once retry count > 3, to reduce
+                        * WiFi duration
+                        */
                        if (wait_count == 1)
+                               /* to avoid loop between the two levels */
                                m++;
                        else
                                m = 1;
 
                        if (m >= 20)
+                               /* maximum of m = 20 ' will recheck if need to
+                                * adjust wifi duration in maximum time interval
+                                * 120 seconds
+                                */
                                m = 20;
 
                        n = 3 * m;
@@ -1186,13 +1211,7 @@ void btc8723b1ant_tdma_dur_adj_for_acl(struct btc_coexist *btcoexist,
                }
 
                if (result == -1) {
-                       if ((BT_INFO_8723B_1ANT_A2DP_BASIC_RATE(bt_info_ext)) &&
-                           ((coex_dm->cur_ps_tdma == 1) ||
-                            (coex_dm->cur_ps_tdma == 2))) {
-                               halbtc8723b1ant_ps_tdma(btcoexist, NORMAL_EXEC,
-                                                       true, 9);
-                               coex_dm->ps_tdma_du_adj_type = 9;
-                       } else if (coex_dm->cur_ps_tdma == 1) {
+                       if (coex_dm->cur_ps_tdma == 1) {
                                halbtc8723b1ant_ps_tdma(btcoexist, NORMAL_EXEC,
                                                        true, 2);
                                coex_dm->ps_tdma_du_adj_type = 2;
@@ -1206,13 +1225,7 @@ void btc8723b1ant_tdma_dur_adj_for_acl(struct btc_coexist *btcoexist,
                                coex_dm->ps_tdma_du_adj_type = 11;
                        }
                } else if (result == 1) {
-                       if ((BT_INFO_8723B_1ANT_A2DP_BASIC_RATE(bt_info_ext)) &&
-                           ((coex_dm->cur_ps_tdma == 1) ||
-                            (coex_dm->cur_ps_tdma == 2))) {
-                               halbtc8723b1ant_ps_tdma(btcoexist, NORMAL_EXEC,
-                                                       true, 9);
-                               coex_dm->ps_tdma_du_adj_type = 9;
-                       } else if (coex_dm->cur_ps_tdma == 11) {
+                       if (coex_dm->cur_ps_tdma == 11) {
                                halbtc8723b1ant_ps_tdma(btcoexist, NORMAL_EXEC,
                                                        true, 9);
                                coex_dm->ps_tdma_du_adj_type = 9;
@@ -1225,11 +1238,6 @@ void btc8723b1ant_tdma_dur_adj_for_acl(struct btc_coexist *btcoexist,
                                                        true, 1);
                                coex_dm->ps_tdma_du_adj_type = 1;
                        }
-               } else {
-                       /* if busy / idle change */
-                       RT_TRACE(rtlpriv, COMP_BT_COEXIST, DBG_LOUD,
-                                "[BTCoex],********* TDMA(on, %d) ********\n",
-                                coex_dm->cur_ps_tdma);
                }
 
                if (coex_dm->cur_ps_tdma != 1 && coex_dm->cur_ps_tdma != 2 &&
@@ -1448,12 +1456,12 @@ static void halbtc8723b1ant_action_wifi_connected_bt_acl_busy(
                        halbtc8723b1ant_coex_table_with_type(btcoexist,
                                                             NORMAL_EXEC, 2);
                        coex_dm->auto_tdma_adjust = false;
-               } else { /* for low BT RSSI */
-                       halbtc8723b1ant_ps_tdma(btcoexist, NORMAL_EXEC,
-                                               true, 11);
+               } else {
+                       btc8723b1ant_tdma_dur_adj_for_acl(btcoexist,
+                                                         wifi_status);
                        halbtc8723b1ant_coex_table_with_type(btcoexist,
                                                             NORMAL_EXEC, 1);
-                       coex_dm->auto_tdma_adjust = false;
+                       coex_dm->auto_tdma_adjust = true;
                }
        } else if (bt_link_info->hid_exist &&
                bt_link_info->a2dp_exist) { /* HID + A2DP */