All the chips currently supported have a "scoreboard": the chip keeps
track of certain things related to bluetooth, for example, whether
bluetooth is active. The information can be read from register 0xaa.
RTL8821AU doesn't have this. Implement bluetooth activity detection in
rtw_coex_monitor_bt_enable() based on the bluetooth TX/RX counters.
This is mostly important for RTL8811AU, the version of RTL8821AU without
bluetooth. Without this change, the driver thinks bluetooth is active
and the wifi speeds are low.
Signed-off-by: Bitterblue Smith <rtl8821cerfe2@xxxxxxxxx>
---
drivers/net/wireless/realtek/rtw88/coex.c | 18 ++++++++++++++++++
drivers/net/wireless/realtek/rtw88/main.h | 1 +
2 files changed, 19 insertions(+)
diff --git a/drivers/net/wireless/realtek/rtw88/coex.c b/drivers/net/wireless/realtek/rtw88/coex.c
index 7f12dcc03d70..39fbc5ef82f8 100644
--- a/drivers/net/wireless/realtek/rtw88/coex.c
+++ b/drivers/net/wireless/realtek/rtw88/coex.c
@@ -494,11 +494,29 @@ static void rtw_coex_monitor_bt_enable(struct rtw_dev *rtwdev)
struct rtw_coex_stat *coex_stat = &coex->stat;
struct rtw_coex_dm *coex_dm = &coex->dm;
bool bt_disabled = false;
+ bool bt_active = true;
u16 score_board;
if (chip->scbd_support) {
score_board = rtw_coex_read_scbd(rtwdev);
bt_disabled = !(score_board & COEX_SCBD_ONOFF);
+ } else {
+ if (coex_stat->hi_pri_tx == 0 && coex_stat->hi_pri_rx == 0 &&
+ coex_stat->lo_pri_tx == 0 && coex_stat->lo_pri_rx == 0)
+ bt_active = false;
+
+ if (coex_stat->hi_pri_tx == 0xffff && coex_stat->hi_pri_rx == 0xffff &&
+ coex_stat->lo_pri_tx == 0xffff && coex_stat->lo_pri_rx == 0xffff)
+ bt_active = false;
+
+ if (bt_active) {
+ coex_stat->bt_disable_cnt = 0;
+ bt_disabled = false;
+ } else {
+ coex_stat->bt_disable_cnt++;
+ if (coex_stat->bt_disable_cnt >= 10)
+ bt_disabled = true;
+ }
}
if (coex_stat->bt_disabled != bt_disabled) {
diff --git a/drivers/net/wireless/realtek/rtw88/main.h b/drivers/net/wireless/realtek/rtw88/main.h
index bc444c4cfade..bd43bb759949 100644
--- a/drivers/net/wireless/realtek/rtw88/main.h
+++ b/drivers/net/wireless/realtek/rtw88/main.h
@@ -1496,6 +1496,7 @@ struct rtw_coex_stat {
u8 bt_hid_slot;
u8 bt_a2dp_bitpool;
u8 bt_iqk_state;
+ u8 bt_disable_cnt;
u16 wl_beacon_interval;
u8 wl_noisy_level;
--
2.46.0
