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From: Ping-Ke Shih <pkshih@realtek.com>
To: <kvalo@kernel.org>
CC: <ku920601@realtek.com>, <linux-wireless@vger.kernel.org>
Subject: [PATCH] wifi: rtw88: coex: Prevent doing I/O during Wi-Fi power saving
Date: Wed, 20 Mar 2024 15:50:47 +0800
Message-ID: <20240320075047.31810-1-pkshih@realtek.com>
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From: Ching-Te Ku <ku920601@realtek.com>

Fix Wi-Fi 2.4Ghz throughput drop over than 40% when Bluetooh is idle.
The code flow will read registers during Wi-Fi power saving, and be
returned, which results in incorrect counters to do mechanism judgment.
Adjust the code flow. Will leave Wi-Fi power save mode first then update
counters.

Signed-off-by: Ching-Te Ku <ku920601@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
---
 drivers/net/wireless/realtek/rtw88/coex.c | 4 +++-
 drivers/net/wireless/realtek/rtw88/main.c | 5 ++---
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw88/coex.c b/drivers/net/wireless/realtek/rtw88/coex.c
index 86467d2f8888..de3332eb7a22 100644
--- a/drivers/net/wireless/realtek/rtw88/coex.c
+++ b/drivers/net/wireless/realtek/rtw88/coex.c
@@ -3937,7 +3937,9 @@ void rtw_coex_display_coex_info(struct rtw_dev *rtwdev, struct seq_file *m)
 	lte_coex = rtw_coex_read_indirect_reg(rtwdev, 0x38);
 	bt_coex = rtw_coex_read_indirect_reg(rtwdev, 0x54);
 
-	if (!coex_stat->bt_disabled && !coex_stat->bt_mailbox_reply) {
+	if (!coex_stat->wl_under_ips &&
+	    (!coex_stat->wl_under_lps || coex_stat->wl_force_lps_ctrl) &&
+	    !coex_stat->bt_disabled && !coex_stat->bt_mailbox_reply) {
 		rtw_coex_get_bt_supported_version(rtwdev,
 				&coex_stat->bt_supported_version);
 		rtw_coex_get_bt_patch_version(rtwdev, &coex_stat->patch_ver);
diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index ffba6b88f392..81ef4717dbf4 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -227,9 +227,6 @@ static void rtw_watch_dog_work(struct work_struct *work)
 	else
 		clear_bit(RTW_FLAG_BUSY_TRAFFIC, rtwdev->flags);
 
-	rtw_coex_wl_status_check(rtwdev);
-	rtw_coex_query_bt_hid_list(rtwdev);
-
 	if (busy_traffic != test_bit(RTW_FLAG_BUSY_TRAFFIC, rtwdev->flags))
 		rtw_coex_wl_status_change_notify(rtwdev, 0);
 
@@ -257,6 +254,8 @@ static void rtw_watch_dog_work(struct work_struct *work)
 
 	/* make sure BB/RF is working for dynamic mech */
 	rtw_leave_lps(rtwdev);
+	rtw_coex_wl_status_check(rtwdev);
+	rtw_coex_query_bt_hid_list(rtwdev);
 
 	rtw_phy_dynamic_mechanism(rtwdev);
 
-- 
2.25.1