wifi: rtw89: suppress the log for specific SER called CMDPSR_FRZTO

For 8852CE, there is abnormal state called CMDPSR_FRZTO,
which occasionally happens in some platforms, and could be
found by firmware and fixed in current SER flow, so we add
suppress function to avoid verbose message for this resolved case.

Signed-off-by: Chin-Yen Lee <[email protected]>
Signed-off-by: Ping-Ke Shih <[email protected]>
Signed-off-by: Kalle Valo <[email protected]>
Link: https://lore.kernel.org/r/[email protected]

2 files changed, 37 insertions, 0 deletions

diff --git a/drivers/net/wireless/realtek/rtw89/core.h b/drivers/net/wireless/realtek/rtw89/core.h
index d36bdbdd1b77..b60cd9852259 100644
--- a/drivers/net/wireless/realtek/rtw89/core.h
+++ b/drivers/net/wireless/realtek/rtw89/core.h
@@ -3940,6 +3940,7 @@ enum rtw89_ser_rcvy_step {
 	RTW89_SER_DRV_STOP_RX,
 	RTW89_SER_DRV_STOP_RUN,
 	RTW89_SER_HAL_STOP_DMA,
+	RTW89_SER_SUPPRESS_LOG,
 	RTW89_NUM_OF_SER_FLAGS
 };
 
diff --git a/drivers/net/wireless/realtek/rtw89/mac.c b/drivers/net/wireless/realtek/rtw89/mac.c
index e5996a94c0de..acba53cf7cc3 100644
--- a/drivers/net/wireless/realtek/rtw89/mac.c
+++ b/drivers/net/wireless/realtek/rtw89/mac.c
@@ -644,6 +644,39 @@ static void rtw89_mac_dump_err_status(struct rtw89_dev *rtwdev,
 	rtw89_info(rtwdev, "<---\n");
 }
 
+static bool rtw89_mac_suppress_log(struct rtw89_dev *rtwdev, u32 err)
+{
+	struct rtw89_ser *ser = &rtwdev->ser;
+	u32 dmac_err, imr, isr;
+	int ret;
+
+	if (rtwdev->chip->chip_id == RTL8852C) {
+		ret = rtw89_mac_check_mac_en(rtwdev, 0, RTW89_DMAC_SEL);
+		if (ret)
+			return true;
+
+		if (err == MAC_AX_ERR_L1_ERR_DMAC) {
+			dmac_err = rtw89_read32(rtwdev, R_AX_DMAC_ERR_ISR);
+			imr = rtw89_read32(rtwdev, R_AX_TXPKTCTL_B0_ERRFLAG_IMR);
+			isr = rtw89_read32(rtwdev, R_AX_TXPKTCTL_B0_ERRFLAG_ISR);
+
+			if ((dmac_err & B_AX_TXPKTCTRL_ERR_FLAG) &&
+			    ((isr & imr) & B_AX_B0_ISR_ERR_CMDPSR_FRZTO)) {
+				set_bit(RTW89_SER_SUPPRESS_LOG, ser->flags);
+				return true;
+			}
+		} else if (err == MAC_AX_ERR_L1_RESET_DISABLE_DMAC_DONE) {
+			if (test_bit(RTW89_SER_SUPPRESS_LOG, ser->flags))
+				return true;
+		} else if (err == MAC_AX_ERR_L1_RESET_RECOVERY_DONE) {
+			if (test_and_clear_bit(RTW89_SER_SUPPRESS_LOG, ser->flags))
+				return true;
+		}
+	}
+
+	return false;
+}
+
 u32 rtw89_mac_get_err_status(struct rtw89_dev *rtwdev)
 {
 	u32 err, err_scnr;
@@ -667,6 +700,9 @@ u32 rtw89_mac_get_err_status(struct rtw89_dev *rtwdev)
 	else if (err_scnr == RTW89_RXI300_ERROR)
 		err = MAC_AX_ERR_RXI300;
 
+	if (rtw89_mac_suppress_log(rtwdev, err))
+		return err;
+
 	rtw89_fw_st_dbg_dump(rtwdev);
 	rtw89_mac_dump_err_status(rtwdev, err);