Solved
Ethernet PHY does not work with 100 Mbps Full Duplex but works with 10 Mbps Full Duplex
Hello,
we want to bring up our own board with STM32MP and ethernet phy LAN8720 (10/100 Mbps).
Seems that kernel is recognizing ethernet phy on boot up and configure it with 100 Mbps Full Duplex.
[ 2.907461] stm32-dwmac 5800a000.ethernet: IRQ eth_lpi not found
[ 2.912172] stm32-dwmac 5800a000.ethernet: PTP uses main clock
[ 2.917902] stm32-dwmac 5800a000.ethernet: no reset control found
[ 2.923940] stm32-dwmac 5800a000.ethernet: No phy clock provided...
[ 2.930837] stm32-dwmac 5800a000.ethernet: User ID: 0x40, Synopsys ID: 0x42
[ 2.937162] stm32-dwmac 5800a000.ethernet: DWMAC4/5
[ 2.942051] stm32-dwmac 5800a000.ethernet: DMA HW capability register supported
[ 2.949371] stm32-dwmac 5800a000.ethernet: RX Checksum Offload Engine supported
[ 2.956661] stm32-dwmac 5800a000.ethernet: TX Checksum insertion supported
[ 2.963500] stm32-dwmac 5800a000.ethernet: Wake-Up On Lan supported
[ 2.969774] stm32-dwmac 5800a000.ethernet: TSO supported
[ 2.975050] stm32-dwmac 5800a000.ethernet: Enable RX Mitigation via HW Watchdog Timer
[ 2.982910] stm32-dwmac 5800a000.ethernet: TSO feature enabled
[ 14.414385] using random self ethernet address
[ 14.478328] using random host ethernet address
[ 17.106903] stm32-dwmac 5800a000.ethernet eth0: PHY [stmmac-0:01] driver [SMSC LAN8710/LAN8720]
[ 17.157900] stm32-dwmac 5800a000.ethernet eth0: No Safety Features support found
[ 17.163849] stm32-dwmac 5800a000.ethernet eth0: IEEE 1588-2008 Advanced Timestamp supported
[ 17.217406] stm32-dwmac 5800a000.ethernet eth0: registered PTP clock
[ 17.248317] stm32-dwmac 5800a000.ethernet eth0: configuring for phy/rmii link mode
[ 19.369837] stm32-dwmac 5800a000.ethernet eth0: Link is Up - 100Mbps/Full - flow control rx/tx
[ 19.462378] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes readyHowever there is no connection to my router. I do not get an ip address.
~# ifconfig
eth0 Link encap:Ethernet HWaddr 86:6F:B4:A4:73:6B
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:570 errors:0 dropped:0 overruns:0 frame:0
TX packets:434 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:92105 (89.9 KiB) TX bytes:77256 (75.4 KiB)
Interrupt:50If I change my ethernet configuration with `ethtool` to 10 Mbps Full Duplex I get an ip address and a connection.
~# ethtool -s eth0 speed 10 duplex full
[ 1980.176613] stm32-dwmac 5800a000.ethernet eth0: Link is Down
[ 1982.888396] stm32-dwmac 5800a000.ethernet eth0: Link is Up - 10Mbps/Full - flow control rx/tx
~# ifconfig
eth0 Link encap:Ethernet HWaddr 86:6F:B4:A4:73:6B
inet addr:192.168.10.155 Bcast:192.168.10.255 Mask:255.255.255.0
inet6 addr: fe80::9ed8:22fe:9399:c183/64 Scope:Link
UP BROADCAST RUNNING MULTICAST MTU:1500 Metric:1
RX packets:729 errors:0 dropped:0 overruns:0 frame:0
TX packets:552 errors:0 dropped:0 overruns:0 carrier:0
collisions:0 txqueuelen:1000
RX bytes:117708 (114.9 KiB) TX bytes:93743 (91.5 KiB)
Interrupt:50
~# iperf3 -c 192.168.10.203
Connecting to host 192.168.10.203, port 5201
[ 5] local 192.168.10.155 port 47588 connected to 192.168.10.203 port 5201
[ ID] Interval Transfer Bitrate Retr Cwnd
[ 5] 0.00-1.00 sec 1.20 MBytes 10.0 Mbits/sec 0 29.7 KBytes
[ 5] 1.00-2.00 sec 1.14 MBytes 9.59 Mbits/sec 0 29.7 KBytes
[ 5] 2.00-3.00 sec 1.09 MBytes 9.17 Mbits/sec 0 29.7 KBytes
[ 5] 3.00-4.00 sec 1.14 MBytes 9.59 Mbits/sec 0 29.7 KBytes
[ 5] 4.00-5.00 sec 1.09 MBytes 9.17 Mbits/sec 0 29.7 KBytes
[ 5] 5.00-6.00 sec 1.14 MBytes 9.59 Mbits/sec 0 29.7 KBytes
[ 5] 6.00-7.00 sec 1.14 MBytes 9.59 Mbits/sec 0 29.7 KBytes
[ 5] 7.00-8.00 sec 1.09 MBytes 9.17 Mbits/sec 0 29.7 KBytes
[ 5] 8.00-9.00 sec 1.14 MBytes 9.59 Mbits/sec 0 29.7 KBytes
[ 5] 9.00-10.00 sec 1.09 MBytes 9.17 Mbits/sec 0 29.7 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval Transfer Bitrate Retr
[ 5] 0.00-10.00 sec 11.3 MBytes 9.47 Mbits/sec 0 sender
[ 5] 0.00-10.01 sec 11.2 MBytes 9.41 Mbits/sec receiver
iperf Done.This is my device tree configuration:
ethernet0: ethernet@5800a000 {
compatible = "st,stm32mp1-dwmac", "snps,dwmac-4.20a";
reg = <0x5800a000 0x2000>;
reg-names = "stmmaceth";
interrupts-extended = <&intc GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>,
<&exti 70 IRQ_TYPE_LEVEL_HIGH>;
interrupt-names = "macirq",
"eth_wake_irq";
clock-names = "stmmaceth",
"mac-clk-tx",
"mac-clk-rx",
"ethstp";
clocks = <&rcc ETHMAC>,
<&rcc ETHTX>,
<&rcc ETHRX>,
<&rcc ETHSTP>;
st,syscon = <&syscfg 0x4>;
snps,mixed-burst;
snps,pbl = <2>;
snps,en-tx-lpi-clockgating;
snps,axi-config = <&stmmac_axi_config_0>;
snps,tso;
power-domains = <&pd_core>;
status = "disabled";
};
ðernet0{
pinctrl-names = "default", "sleep";
pinctrl-0 = <ð1_pins_mx>;
pinctrl-1 = <ð1_sleep_pins_mx>;
status = "okay";
phy-mode = "rmii";
max-speed = <100>;
phy-handle = <&phy0>;
mdio0 {
#address-cells = <1>;
#size-cells = <0>;
compatible = "snps,dwmac-mdio";
reset-gpios = <&gpioz 7 GPIO_ACTIVE_LOW>;
reset-delay-us = <100000>;
phy0: ethernet-phy@1 {
reg = <1>;
smsc,disable-energy-detect;
};
};
};
eth1_pins_mx: eth1_mx-0 {
pins1 {
pinmux = <STM32_PINMUX('A', 1, AF11)>, /* ETH1_REF_CLK */
<STM32_PINMUX('C', 1, AF11)>, /* ETH1_MDC */
<STM32_PINMUX('G', 13, AF11)>, /* ETH1_TXD0 */
<STM32_PINMUX('G', 14, AF11)>; /* ETH1_TXD1 */
bias-disable;
drive-push-pull;
slew-rate = <1>;
};
pins2 {
pinmux = <STM32_PINMUX('A', 2, AF11)>; /* ETH1_MDIO */
bias-disable;
drive-push-pull;
slew-rate = <0>;
};
pins3 {
pinmux = <STM32_PINMUX('A', 7, AF11)>, /* ETH1_CRS_DV */
<STM32_PINMUX('C', 4, AF11)>, /* ETH1_RXD0 */
<STM32_PINMUX('C', 5, AF11)>; /* ETH1_RXD1 */
bias-disable;
};
pins4 {
pinmux = <STM32_PINMUX('B', 11, AF11)>; /* ETH1_TX_EN */
};
};I have also read this article but do not get a solution.
Is there a way to configure STM32MP MAC exactly for 100 Mbps?
Or are there any other configurations I can access?
It's strange that there is no problem with 10 Mbps, but 100 Mbps are not possible....
Thanks for help!
Kind regards