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Date: Tue, 27 Feb 2024 14:20:01 +0200
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From: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Subject: [PATCH 3/4] wifi: rtw88: 8821c: Fix beacon loss and disconnect
To: "linux-wireless@vger.kernel.org" <linux-wireless@vger.kernel.org>
Cc: Ping-Ke Shih <pkshih@realtek.com>
References: <909d9f75-44cd-4710-9d3f-56691fd58090@gmail.com>
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Tenda U9 V2.0, which contains RTL8811CU, is practically unusable because
of frequent disconnections:

Feb 23 14:46:45 ideapad2 wpa_supplicant[427]: wlp3s0f3u2: CTRL-EVENT-BEACON-LOSS
Feb 23 14:46:46 ideapad2 wpa_supplicant[427]: wlp3s0f3u2: CTRL-EVENT-DISCONNECTED
	bssid=90:55:de:__:__:__ reason=4 locally_generated=1

Feb 23 14:46:52 ideapad2 wpa_supplicant[427]: wlp3s0f3u2: CTRL-EVENT-CONNECTED
	- Connection to 90:55:de:__:__:__ completed [id=0 id_str=]
Feb 23 14:46:54 ideapad2 wpa_supplicant[427]: wlp3s0f3u2: CTRL-EVENT-BEACON-LOSS
Feb 23 14:46:55 ideapad2 wpa_supplicant[427]: wlp3s0f3u2: CTRL-EVENT-DISCONNECTED
	bssid=90:55:de:__:__:__ reason=4 locally_generated=1

Feb 23 14:47:01 ideapad2 wpa_supplicant[427]: wlp3s0f3u2: CTRL-EVENT-CONNECTED
	- Connection to 90:55:de:__:__:__ completed [id=0 id_str=]
Feb 23 14:47:04 ideapad2 wpa_supplicant[427]: wlp3s0f3u2: CTRL-EVENT-BEACON-LOSS
Feb 23 14:47:05 ideapad2 wpa_supplicant[427]: wlp3s0f3u2: CTRL-EVENT-DISCONNECTED
	bssid=90:55:de:__:__:__ reason=4 locally_generated=1

This is caused by a mistake in the chip initialisation. This version of
the chip requires loading an extra AGC table right after the main one,
but the extra table is being loaded at the wrong time.

Move the extra AGC table loading to the right place.

Fixes: 5d6651fe8583 ("rtw88: 8821c: support RFE type2 wifi NIC")
Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
---
 drivers/net/wireless/realtek/rtw88/main.c | 2 --
 drivers/net/wireless/realtek/rtw88/phy.c  | 3 +++
 2 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/drivers/net/wireless/realtek/rtw88/main.c b/drivers/net/wireless/realtek/rtw88/main.c
index 6d22628129d0..ffba6b88f392 100644
--- a/drivers/net/wireless/realtek/rtw88/main.c
+++ b/drivers/net/wireless/realtek/rtw88/main.c
@@ -2032,8 +2032,6 @@ static int rtw_chip_board_info_setup(struct rtw_dev *rtwdev)
 	rtw_phy_setup_phy_cond(rtwdev, hal->pkg_type);
 
 	rtw_phy_init_tx_power(rtwdev);
-	if (rfe_def->agc_btg_tbl)
-		rtw_load_table(rtwdev, rfe_def->agc_btg_tbl);
 	rtw_load_table(rtwdev, rfe_def->phy_pg_tbl);
 	rtw_load_table(rtwdev, rfe_def->txpwr_lmt_tbl);
 	rtw_phy_tx_power_by_rate_config(hal);
diff --git a/drivers/net/wireless/realtek/rtw88/phy.c b/drivers/net/wireless/realtek/rtw88/phy.c
index 128e75a81bf3..37ef80c9091d 100644
--- a/drivers/net/wireless/realtek/rtw88/phy.c
+++ b/drivers/net/wireless/realtek/rtw88/phy.c
@@ -1761,12 +1761,15 @@ static void rtw_load_rfk_table(struct rtw_dev *rtwdev)
 
 void rtw_phy_load_tables(struct rtw_dev *rtwdev)
 {
+	const struct rtw_rfe_def *rfe_def = rtw_get_rfe_def(rtwdev);
 	const struct rtw_chip_info *chip = rtwdev->chip;
 	u8 rf_path;
 
 	rtw_load_table(rtwdev, chip->mac_tbl);
 	rtw_load_table(rtwdev, chip->bb_tbl);
 	rtw_load_table(rtwdev, chip->agc_tbl);
+	if (rfe_def->agc_btg_tbl)
+		rtw_load_table(rtwdev, rfe_def->agc_btg_tbl);
 	rtw_load_rfk_table(rtwdev);
 
 	for (rf_path = 0; rf_path < rtwdev->hal.rf_path_num; rf_path++) {
-- 
2.43.2