It seems RTL8852CU can only use TX channels 0, 2, and 8 (for band 0),
otherwise the chip stops working after downloading at maximum speed
for a few seconds.
Signed-off-by: Bitterblue Smith <rtl8821cerfe2@xxxxxxxxx>
---
drivers/net/wireless/realtek/rtw89/txrx.h | 19 +++++++++++++++++++
1 file changed, 19 insertions(+)
diff --git a/drivers/net/wireless/realtek/rtw89/txrx.h b/drivers/net/wireless/realtek/rtw89/txrx.h
index ec01bfc363da..318fd0ac8726 100644
--- a/drivers/net/wireless/realtek/rtw89/txrx.h
+++ b/drivers/net/wireless/realtek/rtw89/txrx.h
@@ -734,6 +734,25 @@ rtw89_core_get_qsel_mgmt(struct rtw89_dev *rtwdev, struct rtw89_core_tx_request
static inline u8 rtw89_core_get_ch_dma(struct rtw89_dev *rtwdev, u8 qsel)
{
+ if (rtwdev->hci.type == RTW89_HCI_TYPE_USB &&
+ rtwdev->chip->chip_id == RTL8852C) {
+ switch (qsel) {
+ default:
+ rtw89_warn(rtwdev, "Cannot map qsel to dma: %d\n",
+ qsel);
+ fallthrough;
+ case RTW89_TX_QSEL_BE_0:
+ case RTW89_TX_QSEL_VO_0:
+ return RTW89_TXCH_ACH0;
+ case RTW89_TX_QSEL_BK_0:
+ case RTW89_TX_QSEL_VI_0:
+ return RTW89_TXCH_ACH2;
+ case RTW89_TX_QSEL_B0_MGMT:
+ case RTW89_TX_QSEL_B0_HI:
+ return RTW89_TXCH_CH8;
+ }
+ }
+
switch (qsel) {
default:
rtw89_warn(rtwdev, "Cannot map qsel to dma: %d\n", qsel);
--
2.50.0
