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wifi: rtw88: coex: Ignore BT info byte 5 from RTL8821A

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Sometimes while watching a Youtube video with Bluetooth headphones the
audio has a lot of interruptions, because the 5th byte of the BT info
sent by RTL8821AU has strange values, which result in
coex_stat->bt_hid_pair_num being 2 or 3. When this happens
rtw_coex_freerun_check() returns true, which causes
rtw_coex_action_wl_connected() to call rtw_coex_action_freerun() instead
of rtw_coex_action_bt_a2dp().

The RTL8821AU vendor driver doesn't do anything with the 5th byte of the
BT info, so ignore it here as well.

Signed-off-by: Bitterblue Smith <rtl8821cerfe2@gmail.com>
Acked-by: Ping-Ke Shih <pkshih@realtek.com>
Signed-off-by: Ping-Ke Shih <pkshih@realtek.com>
Link: https://patch.msgid.link/bbf06c83-d2ee-4205-8fbb-829e2347586f@gmail.com
This commit is contained in:
Bitterblue Smith 2026-03-26 00:27:15 +02:00 committed by Ping-Ke Shih
parent e0da9859cf
commit 658e3c8369
1 changed files with 3 additions and 0 deletions
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3
drivers/net/wireless/realtek/rtw88/coex.c
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@ -3109,6 +3109,9 @@ void rtw_coex_bt_info_notify(struct rtw_dev *rtwdev, u8 *buf, u8 length)
for (i = 0; i < COEX_BTINFO_LENGTH; i++)
coex_stat->bt_info_c2h[rsp_source][i] = buf[i];
if (rtwdev->chip->id == RTW_CHIP_TYPE_8821A)
coex_stat->bt_info_c2h[rsp_source][5] = 0;
/* get the same info from bt, skip it */
if (coex_stat->bt_info_c2h[rsp_source][1] == coex_stat->bt_info_lb2 &&
coex_stat->bt_info_c2h[rsp_source][2] == coex_stat->bt_info_lb3 &&