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wifi: rtw88: coex: Support chips without a scoreboard

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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@gmail.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/5058f23d-2086-42cd-82ad-eef31a348467@gmail.com
This commit is contained in:
Bitterblue Smith 2024-10-23 17:14:12 +03:00 committed by Ping-Ke Shih
parent 57289d30cd
commit b19840afc0
2 changed files with 19 additions and 0 deletions
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18
drivers/net/wireless/realtek/rtw88/coex.c
View File

@ -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) {

1
drivers/net/wireless/realtek/rtw88/main.h
View File

@ -1494,6 +1494,7 @@ 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;