[PATCH 7/9] wifi: rtw89: coex: summarize Wi-Fi to BT scoreboard and inform BT one time a cycle

[Ping-Ke Shih <pkshih@xxxxxxxxxxx>]

From: Ching-Te Ku <ku920601@xxxxxxxxxxx>

If Wi-Fi driver send Wi-Fi status to BT via scoreboard too frequent in a
short moment, BT will loss some of them because of hardware response time.
To avoid this issue, change the code flow. Summarize the scoreboard changes
and if the value have changed, send the scoreboard to BT only once in
a coexistence processing cycle. It also can help to reduce driver I/O.

Signed-off-by: Ching-Te Ku <ku920601@xxxxxxxxxxx>
Signed-off-by: Ping-Ke Shih <pkshih@xxxxxxxxxxx>
---
 drivers/net/wireless/realtek/rtw89/coex.c | 25 ++++++++++++++++-------
 drivers/net/wireless/realtek/rtw89/core.h |  1 +
 2 files changed, 19 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw89/coex.c b/drivers/net/wireless/realtek/rtw89/coex.c
index 85c8e7ffb56c7..ef6c5701ebcf5 100644
--- a/drivers/net/wireless/realtek/rtw89/coex.c
+++ b/drivers/net/wireless/realtek/rtw89/coex.c
@@ -3558,11 +3558,22 @@ static void _set_bt_rx_agc(struct rtw89_dev *rtwdev)
 /* TODO add these functions */
 static void _action_common(struct rtw89_dev *rtwdev)
 {
+	struct rtw89_btc *btc = &rtwdev->btc;
+	struct rtw89_btc_wl_info *wl = &btc->cx.wl;
+
 	_set_btg_ctrl(rtwdev);
 	_set_wl_tx_limit(rtwdev);
 	_set_bt_afh_info(rtwdev);
 	_set_bt_rx_agc(rtwdev);
 	_set_rf_trx_para(rtwdev);
+
+	if (wl->scbd_change) {
+		rtw89_mac_cfg_sb(rtwdev, wl->scbd);
+		rtw89_debug(rtwdev, RTW89_DBG_BTC, "[BTC], write scbd: 0x%08x\n",
+			    wl->scbd);
+		wl->scbd_change = false;
+		btc->cx.cnt_wl[BTC_WCNT_SCBDUPDATE]++;
+	}
 }
 
 static void _action_by_bt(struct rtw89_dev *rtwdev)
@@ -3885,20 +3896,20 @@ static void _write_scbd(struct rtw89_dev *rtwdev, u32 val, bool state)
 	struct rtw89_btc *btc = &rtwdev->btc;
 	struct rtw89_btc_wl_info *wl = &btc->cx.wl;
 	u32 scbd_val = 0;
+	u8 force_exec = false;
 
 	if (!chip->scbd)
 		return;
 
 	scbd_val = state ? wl->scbd | val : wl->scbd & ~val;
 
-	if (scbd_val == wl->scbd)
-		return;
-	rtw89_mac_cfg_sb(rtwdev, scbd_val);
-	rtw89_debug(rtwdev, RTW89_DBG_BTC, "[BTC], write scbd: 0x%08x\n",
-		    scbd_val);
-	wl->scbd = scbd_val;
+	if (val & BTC_WSCB_ACTIVE || val & BTC_WSCB_ON)
+		force_exec = true;
 
-	btc->cx.cnt_wl[BTC_WCNT_SCBDUPDATE]++;
+	if (scbd_val != wl->scbd || force_exec) {
+		wl->scbd = scbd_val;
+		wl->scbd_change = true;
+	}
 }
 
 static u8
diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h
index c4eefa54ed864..8af1813cba884 100644
--- a/drivers/net/wireless/realtek/rtw89/core.h
+++ b/drivers/net/wireless/realtek/rtw89/core.h
@@ -1308,6 +1308,7 @@ struct rtw89_btc_wl_info {
 	u8 port_id[RTW89_WIFI_ROLE_MLME_MAX];
 	u8 rssi_level;
 
+	bool scbd_change;
 	u32 scbd;
 };
 
-- 
2.25.1