imx8mp uart3/uart4 stop receive data after connect WIFI

[dreamxjtu]

hello,

    Our device peripherals are shown in the figure below. After the device is powered on, it automatically connects to Wi-Fi and establishes communication with modules A/B. However, after running for a period of time , the qt application program becomes unable to receive data from modules A/B via UART3/4, although it can still send data to them. The Wi-Fi connection remains normal. If the Qt application is killed and reloaded when this issue occurs, communication can be restored.The kernel version is 5.10.9. What might be the reason for this, and how can we troubleshoot and resolve the issue? Thank you.

[59040.102671] RTW: rtw_get_sta_tx_stat() not support
[59043.023763] RTW: rtw_get_sta_tx_stat() not support
[59046.024329] RTW: rtw_get_sta_tx_stat() not support
[59047.866380] ------------[ cut here ]------------
[59047.871251] WARNING: CPU: 0 PID: 80234 at /home/linuxpc/linux_opt/imx8mp_yocto/rtl8852BS/os_dep/linux/sdio_ops_linux.c:580 rtw_sdio_raw_read+0x1c4/0x2cc [8852bs]
[59047.885678] Modules linked in: iio_trig_hrtimer 8852bs(O) imx8_media_dev(C) cfg80211 st_accel_i2c st_sensors_i2c st_accel st_sensors ltr501 industrialio_triggered_buffer kfifo_buf ti_dac082s085 ch9434 ilitek_i2c snd_soc_tas5720 accel_gpio_irq cdc_ether usbnet ch343
[59047.909176] CPU: 0 PID: 80234 Comm: kworker/0:1 Tainted: G WC O 5.10.9-1.0.0+gc78c36e29 #1
[59047.918479] Hardware name: MYIR i.MX8MP BASE falcon mode (DT)
[59047.924229] Workqueue: events sdio_irq_work
[59047.928413] pstate: 40000005 (nZcv daif -PAN -UAO -TCO BTYPE=--)
[59047.934655] pc : rtw_sdio_raw_read+0x1c4/0x2cc [8852bs]
[59047.940096] lr : rtw_sdio_raw_read+0x1bc/0x2cc [8852bs]
[59047.945319] sp : ffff80002adbbb50
[59047.948631] x29: ffff80002adbbb50 x28: 0000000000000000
[59047.953943] x27: 0000000000000000 x26: 0000000000000000
[59047.959254] x25: ffff0000c9d60000 x24: 0000000000000000
[59047.964566] x23: ffff0000c8782000 x22: 0000000000001f00
[59047.969877] x21: ffff0000c096dc00 x20: ffff0000c9d60000
[59047.975188] x19: 0000000000000400 x18: 0000000000000000
[59047.980499] x17: 0000000000000000 x16: 0000000000000000
[59047.985810] x15: 00000112000b9e70 x14: 0000000000000000
[59047.991121] x13: 0000000000000000 x12: 0000000000000000
[59047.996435] x11: 0000000000000000 x10: 0000000000000000
[59048.001745] x9 : 0000000000000000 x8 : 0000000000000080
[59048.007056] x7 : 000000000000007f x6 : 000000000000003d
[59048.012369] x5 : ffff0000ff13f000 x4 : 0000000000005f00
[59048.017681] x3 : 0000000000005f80 x2 : 0000000000000000
[59048.022992] x1 : 0000000000002300 x0 : 00000000ffffffac
[59048.028305] Call trace:
[59048.030985] rtw_sdio_raw_read+0x1c4/0x2cc [8852bs]
[59048.036085] sdio_io+0x198/0x31c [8852bs]
[59048.038236] tas5720 2-006c: failed to read FAULT register: -110
[59048.040311] rtw_sdio_read_cmd53+0x18/0x24 [8852bs]
[59048.051150] rtw_hal_mac_sdio_rx+0x70/0xe8 [8852bs]
[59048.056366] rtw_hal_sdio_rx+0x14/0x20 [8852bs]
[59048.061275] phl_recv_rxfifo_sdio+0x64/0x98 [8852bs]
[59048.066459] rtw_phl_interrupt_handler+0x58/0x198 [8852bs]
[59048.072161] sd_sync_int_hdl+0x40/0x5c [8852bs]
[59048.076694] process_sdio_pending_irqs+0x60/0x1b0
[59048.081397] sdio_irq_work+0x4c/0x80
[59048.084972] process_one_work+0x1cc/0x350
[59048.088981] worker_thread+0x13c/0x470
[59048.092728] kthread+0x154/0x160
[59048.095955] ret_from_fork+0x10/0x30
[59048.099529] ---[ end trace 1b34001a5e7a0146 ]---
[59048.104821] rtl8852bs mmc0:0001:1: rtw_sdio_raw_read: sdio read failed (-84)
[59048.112561] rtl8852bs mmc0:0001:1: RTW_SDIO: READ use CMD53
[59048.119384] rtl8852bs mmc0:0001:1: RTW_SDIO: READ from 0x01f00, 1024 bytes
[59048.126811] RTW_SDIO: READ 00000000: 13 02 20 80 52 00 06 10 4d 9c d9 be 04 00 20 00
[59048.135777] RTW_SDIO: READ 00000010: 16 00 a6 06 02 00 00 10 28 f5 2b 99 16 14 06 00
[59048.144064] RTW: ERROR sdio_io: read FAIL! error(-2) addr=0x01f00 1024 bytes, retry=0,0
[59048.153312] RTW: WARN sdio_io: Retry read addr=0x01f00 1024 bytes, retry=1,1
[59048.188477] RTW: sdio_io: Retry read OK! addr=0x01f00 1024 bytes, retry=1,1
[59048.195471] RTW: Data:
[59048.197953] RTW: F5 01 20 80 62 00 06 10 00 9E D9 BE 04 00 20 00
[59048.205125] RTW: 06 00 A7 06 02 00 00 10 28 F5 2B 99 16 14 06 00
[59048.212286] RTW: 08 42 00 00 01 00 5E 7F FF FA 84 65 69 89 34 80
[59048.219903] RTW: 54 F2 9F 73 92 28 70 6A 0A 2A C6 60 0E 00 00 00
[59048.226884] RTW: AA AA 03 00 00 00 08 00 45 00 01 BD B9 A7 40 00
[59048.234619] RTW: 04 11 FE 1F AC 1F 21 4F EF FF FF FA 69 AF 07 6C
[59048.241581] RTW: 01 A9 8D A4 4E 4F 54 49 46 59 20 2A 20 48 54 54
[59048.249276] RTW: 50 2F 31 2E 31 0D 0A 48 4F 53 54 3A 20 32 33 39
[59048.256437] RTW: 2E 32 35 35 2E 32 35 35 2E 32 35 30 3A 31 39 30
[59048.264191] RTW: 30 0D 0A 43 41 43 48 45 2D 43 4F 4E 54 52 4F 4C
[59048.271272] RTW: 3A 20 6D 61 78 2D 61 67 65 3D 36 36 0D 0A 4C 4F
[59048.279033] RTW: 43 41 54 49 4F 4E 3A 20 68 74 74 70 3A 2F 2F 31
[59048.286293] RTW: 37 32 2E 33 31 2E 33 33 2E 37 39 3A 34 39 31 35
[59048.293366] RTW: 32 2F 64 65 73 63 72 69 70 74 69 6F 6E 2E 78 6D
[59048.300946] RTW: 6C 0D 0A 4F 50 54 3A 20 22 68 74 74 70 3A 2F 2F
[59048.308553] RTW: 73 63 68 65 6D 61 73 2E 75 70 6E 70 2E 6F 72 67
[59048.315681] RTW: 2F 75 70 6E 70 2F 31 2F 30 2F 22 3B 20 6E 73 3D
[59048.322743] RTW: 30 31 0D 0A 30 31 2D 4E 4C 53 3A 20 30 34 34 30
[59048.330318] RTW: 31 34 62 30 2D 31 64 64 32 2D 31 31 62 32 2D 39
[59048.337345] RTW: 39 31 62 2D 66 35 31 33 37 36 31 32 61 36 66 33
[59048.344868] RTW: 0D 0A 4E 54 3A 20 75 72 6E 3A 6D 69 2D 63 6F 6D
[59048.351895] RTW: 3A 73 65 72 76 69 63 65 3A 52 43 6F 6E 74 72 6F
[59048.359480] RTW: 6C 6C 65 72 3A 31 0D 0A 4E 54 53 3A 20 73 73 64
[59048.366605] RTW: 70 3A 61 6C 69 76 65 0D 0A 53 45 52 56 45 52 3A
[59048.373766] RTW: 20 4C 69 6E 75 78 2F 34 2E 39 2E 31 31 33 20 48
[59048.380785] RTW: 54 54 50 2F 31 2E 30 0D 0A 58 2D 55 73 65 72 2D
[59048.388333] RTW: 41 67 65 6E 74 3A 20 72 65 64 73 6F 6E 69 63 0D
[59048.395367] RTW: 0A 55 53 4E 3A 20 75 75 69 64 3A 37 35 39 36 34
[59048.403003] RTW: 38 61 35 2D 36 30 33 64 2D 34 33 39 66 2D 61 61
[59048.410107] RTW: 62 31 2D 34 63 61 35 66 37 62 33 62 65 38 63 3A
[59048.417850] RTW: 3A 75 72 6E 3A 6D 69 2D 63 6F 6D 3A 73 65 72 76
[59048.424847] RTW: 69 63 65 3A 52 43 6F 6E 74 72 6F 6C 6C 65 72 3A
[59048.432460] RTW: 31 0D 0A 0D 0A 75 1B 2D 33 69 FF 92 1E 6D 7E 43
[59048.439480] RTW: 5B 41 AF DA 59 00 01 00 C0 00 80 01 62 00 06 00
[59048.447042] RTW: 00 00 00 00 01 00 20 00 01 00 F5 31 1F 00 01 00
[59048.454573] RTW: 03 00 00 00 00 00 00 00 8B 43 D9 12 08 00 00 00
[59048.461738] RTW: 00 00 00 00 29 12 B5 01 F9 0A 44 00 58 06 65 00
[59048.468786] RTW: 68 0C 12 00 00 00 00 00 00 00 2E 00 A6 0F E8 03
[59048.476332] RTW: 54 2A 93 08 00 00 00 00 00 00 00 00 00 00 00 00
[59048.483442] RTW: 00 00 00 00 00 00 EF 10 00 00 00 00 1F 2A 8E 5F
[59048.491079] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.498224] RTW: 00 00 00 00 00 00 00 00 02 00 00 00 AA 3E 02 00
[59048.505903] RTW: 8C 09 00 82 82 83 00 00 01 84 2A 34 35 08 90 00
[59048.513069] RTW: 2A 78 6D 09 05 FE FF FF 00 00 00 00 00 25 C0 5F
[59048.520627] RTW: 00 00 00 00 00 00 00 00 49 D5 07 00 00 00 00 00
[59048.527746] RTW: 38 B1 DF AE DF 00 FC E7 D4 F7 F9 F3 E4 F7 F7 BA
[59048.535373] RTW: 32 A0 A0 A0 A0 01 00 00 00 00 00 00 00 00 00 00
[59048.542504] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.550149] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.558420] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.565434] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.573175] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.580164] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.587831] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.594861] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.602530] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.609619] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.616821] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.624497] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.631565] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.638669] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.645707] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.652872] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59048.659914] RTW: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
[59049.048296] RTW: rtw_get_sta_tx_stat() not support
[59052.025201] RTW: rtw_get_sta_tx_stat() not support
[59055.097082] RTW: rtw_get_sta_tx_stat() not support
[59058.024508] RTW: rtw_get_sta_tx_stat() not support
[59061.025913] RTW: rtw_get_sta_tx_stat() not support
[59064.046703] RTW: rtw_get_sta_tx_stat() not support
[59067.027795] RTW: rtw_get_sta_tx_stat() not support
[59070.100002] RTW: rtw_get_sta_tx_stat() not support
[59073.025578] RTW: rtw_get_sta_tx_stat() not support
[59076.027871] RTW: rtw_get_sta_tx_stat() not support
[59079.046137] RTW: rtw_get_sta_tx_stat() not support
[59082.024076] RTW: rtw_get_sta_tx_stat() not support
[59085.101821] RTW: rtw_get_sta_tx_stat() not support
[59088.026437] RTW: rtw_get_sta_tx_stat() not support
[59091.024759] RTW: rtw_get_sta_tx_stat() not support
[59094.046384] RTW: rtw_get_sta_tx_stat() not support
[59097.024395] RTW: rtw_get_sta_tx_stat() not support
[59100.099472] RTW: rtw_get_sta_tx_stat() not support
[59103.025388] RTW: rtw_get_sta_tx_stat() not support
[59106.025607] RTW: rtw_get_sta_tx_stat() not support
[59109.050832] RTW: rtw_get_sta_tx_stat() not support
[59112.025324] RTW: rtw_get_sta_tx_stat() not support
[59115.100097] RTW: rtw_get_sta_tx_stat() not support
[59118.028286] RTW: rtw_get_sta_tx_stat() not support
[59121.026007] RTW: rtw_get_sta_tx_stat() not support
[59124.048823] RTW: rtw_get_sta_tx_stat() not support
[59127.024156] RTW: rtw_get_sta_tx_stat() not support
[59130.101220] RTW: rtw_get_sta_tx_stat() not support
[59133.027155] RTW: rtw_get_sta_tx_stat() not support
[59136.024104] RTW: rtw_get_sta_tx_stat() not support
[59139.046445] RTW: rtw_get_sta_tx_stat() not support
[59142.023902] RTW: rtw_get_sta_tx_stat() not support
[59145.097767] RTW: rtw_get_sta_tx_stat() not support
[59148.024225] RTW: rtw_get_sta_tx_stat() not support
[59151.024542] RTW: rtw_get_sta_tx_stat() not support
[59154.046677] RTW: rtw_get_sta_tx_stat() not support
[59157.024188] RTW: rtw_get_sta_tx_stat() not support
[59160.100230] RTW: rtw_get_sta_tx_stat() not support

[dreamxjtu]

hellio,

      The attached device tree is for the currently problematic device, confirmed to be LF5.10.9

[Manuel_Salas]

Hello @dreamxjtu 

Thank you for sharing your files.

I could not find any device tree inconsistency, everything looks good.

Are you able to capture the UART signal with an scope or logic analyzer when this issue happens?

Also, please try to read the pinmux register with memtool when this issue is present.

Best regards,

Salas.  

[dreamxjtu]

hello @Manuel_Salas
we have capture the UART3/4 TX/RX use a scope and logic analyzer when the issue happens.We found that the signals and data parsing are correct, with no abnormalities detected.
which pinmux register can we try to read?UART3/4 TX and RX?or other IO?

root@myd-jx8mp:/work/nfs/unit_tests# ./memtool -32 0x30330440 1
E
Reading 0x1 count starting at address 0x30330440

0x30330440: 00000140

root@myd-jx8mp:/work/nfs/unit_tests# ./memtool -32 0x30330444 1
E
Reading 0x1 count starting at address 0x30330444

0x30330444: 00000140

root@myd-jx8mp:/work/nfs/unit_tests# ./memtool -32 0x30330498 1
E
Reading 0x1 count starting at address 0x30330498

0x30330498: 00000140

root@myd-jx8mp:/work/nfs/unit_tests# ./memtool -32 0x3033049C 1
E
Reading 0x1 count starting at address 0x3033049C

0x3033049C: 00000140

root@myd-jx8mp:/work/nfs/unit_tests# cat /proc/tty/driver/IMX-uart
serinfo:1.0 driver revision:
0: uart:IMX mmio:0x30860000 irq:32 tx:49174 rx:4241 DSR|CD
1: uart:IMX mmio:0x30890000 irq:34 tx:227698 rx:78 RTS|DTR|DSR|CD
2: uart:IMX mmio:0x30880000 irq:33 tx:579 rx:417229256 brk:12 oe:287947352 RTS|DTR|DSR|CD
3: uart:IMX mmio:0x30A60000 irq:40 tx:279 rx:90046331 oe:62148529 RTS|DTR|DSR|CD

[Manuel_Salas]

Hello.

I refer to the below registers (IOMUX).

For UART3:

3033_01E0 (IOMUXC_SW_MUX_CTL_PAD_ECSPI1_SCLK)

3033_01E4 (IOMUXC_SW_MUX_CTL_PAD_ECSPI1_MOSI)

For UART4:

3033_0238 (IOMUXC_SW_MUX_CTL_PAD_UART4_RXD)

3033_023C (IOMUXC_SW_MUX_CTL_PAD_UART4_TXD)

It is very low probable that those change in this situation but just I want to be sure.

If those are correct while the issue, we need to focus in you QT application.

Best regards,

Salas.

[dreamxjtu]

hello @Manuel_Salas
in addition,we do a test In our QT application, reinitializing the serial port after detecting a communication abort can restore communication.

[Manuel_Salas]

Hello,

If possible, please share the code where the serial communication is handled. (Regarding to the serial communication of UART3 and UART4).

Best regards,

Salas.

[dreamxjtu]

hello @Manuel_Salas
the follows is one uart code,maybe not the reseaon.because it have not happened after disconnecting the WIFI .
SerialPortInfo spInfo{"/dev/ttymxc3",
115200,
QSerialPort::DataBits::Data8,
QSerialPort::Parity::NoParity,
QSerialPort::StopBits::OneStop};
m_transceiver = std::make_shared<Transceiver>(spInfo);

connect(m_serialPtr.get(), &QSerialPort::readyRead,this, &Transceiver::SlotRcvData, Qt::QueuedConnection);// 读取数据


void Transceiver::SlotRcvData()
{
// 接收逻辑
QByteArray buffer = m_serialPtr->readAll();

if (!buffer.isEmpty())
{
for(const auto func : m_recvNoticeFuncs)
{
if (func)
{
func(std::move(buffer)); //回调通知上层，上传接收到数据帧
}
}
}

if ((DEBUG_PRINT_READ == 1 && m_serialPtr->portName() == DEBUG_PORT) || m_recvPrintFlag.load())
{
QString printStr = QString("Len(%1) ").arg(buffer.count());
printStr += buffer.toHex(' ');
qDebug(uart) << QString("%1-[%2 recv] <<= %3").arg(QDateTime::currentDateTime().toMSecsSinceEpoch()).arg(m_serialPtr->portName()).arg(printStr);
}
}

[dreamxjtu]

hello @Manuel_Salas
For UART3:

3033_01E0 (IOMUXC_SW_MUX_CTL_PAD_ECSPI1_SCLK)
3033_01E4 (IOMUXC_SW_MUX_CTL_PAD_ECSPI1_MOSI)

./memtool -32 0x303301E0 2
It appears that the configuration is correct.how to focus in our QT application?

Reading 0x2 count starting at address 0x303301E0
0x303301E0: 00000001 00000001

For UART4:

3033_0238 (IOMUXC_SW_MUX_CTL_PAD_UART4_RXD)
3033_023C (IOMUXC_SW_MUX_CTL_PAD_UART4_TXD)

./memtool -32 0x30330238 2

Reading 0x2 count starting at address 0x30330238

0x30330238: 00000000 00000000

[Manuel_Salas]

Hello @dreamxjtu 

I hope you are doing very well.

Could you pelase share your device tree?

And confirm you are using LF_5.10.9 (Kernel version).

Best regards,

Salas.

[dreamxjtu]

please see the files,thank you

imx8mp-pinfunc.h,myd-jx8mp.dtsi,myd-jx8mp.dtsi,myd-jx8mp-atk-10.dts