Beelink-Mini-MX-2G RTL8211F Ethernet TX fix #127

atsdai · 2022-02-27T23:10:25Z

Hi, I would like to provide the solution to the problem I had with my Beelink-Mini-MX-2G and help anyone who may have the same problem. The ethernet TX was not working properly.
I managed to fix it by converting the meson-gxbb-vega-s95-telos.dtb file to dts (https://stackoverflow.com/questions/21670967/how-to-compile-dts-linux-device-tree-source-files-to-dtb), changing line 1207

- amlogic,tx-delay-ns = <0x02>; 
+ amlogic,tx-delay-ns = <0x04>;

and then converting it back to dtb.
In short, you have to add 2ns to the TX for it to work properly.

Before fixing it

iperf3 -c 192.168.0.1
Connecting to host 192.168.0.1, port 5201
[  5] local 192.168.0.2 port 53012 connected to 192.168.0.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  5.68 MBytes  47.7 Mbits/sec  418   1.41 KBytes
[  5]   1.00-2.00   sec  0.00 Bytes  0.00 bits/sec    1   1.41 KBytes
[  5]   2.00-3.00   sec  0.00 Bytes  0.00 bits/sec    1   1.41 KBytes
[  5]   3.00-4.00   sec  0.00 Bytes  0.00 bits/sec    1   1.41 KBytes
[  5]   4.00-5.00   sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes
[  5]   5.00-6.00   sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes
[  5]   6.00-7.00   sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes
[  5]   7.00-8.00   sec  0.00 Bytes  0.00 bits/sec    1   1.41 KBytes
[  5]   8.00-9.00   sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes
[  5]   9.00-10.00  sec  0.00 Bytes  0.00 bits/sec    0   1.41 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  5.68 MBytes  4.77 Mbits/sec  422             sender
[  5]   0.00-10.00  sec  2.21 MBytes  1.85 Mbits/sec                  receiver

iperf Done.

After fixing it

iperf3 -c 192.168.0.1
Connecting to host 192.168.0.1, port 5201
[  5] local 192.168.0.2 port 53526 connected to 192.168.0.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec   114 MBytes   959 Mbits/sec    0    467 KBytes
[  5]   1.00-2.00   sec   112 MBytes   943 Mbits/sec    0    486 KBytes
[  5]   2.00-3.00   sec   111 MBytes   934 Mbits/sec    0    495 KBytes
[  5]   3.00-4.00   sec   112 MBytes   943 Mbits/sec    0    444 KBytes
[  5]   4.00-5.00   sec   111 MBytes   934 Mbits/sec    0    492 KBytes
[  5]   5.00-6.00   sec   111 MBytes   933 Mbits/sec    0    486 KBytes
[  5]   6.00-7.00   sec   112 MBytes   944 Mbits/sec    0    484 KBytes
[  5]   7.00-8.00   sec   111 MBytes   933 Mbits/sec    0    484 KBytes
[  5]   8.00-9.00   sec   112 MBytes   944 Mbits/sec    0    447 KBytes
[  5]   9.00-10.00  sec   111 MBytes   933 Mbits/sec    0    467 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  1.09 GBytes   940 Mbits/sec    0             sender
[  5]   0.00-10.00  sec  1.09 GBytes   938 Mbits/sec                  receiver

iperf Done.

I don't know if this is unique to my device or if all Beelink-Mini-MX-2G have this problem with telos.dtb.

I hope it helps.

@ophub, THANK YOU VERY MUCH for allowing us to continue using our Android TV boxes.

P.S.: I don't know if this was the right place to post the solution. I thought that more people can see it here. If it's not, please move it to the right place.

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The text was updated successfully, but these errors were encountered:

ophub · 2022-02-28T01:12:16Z

The source code of dtb is in the kernel source code: https://github.com/unifreq/linux-5.15.y/tree/main/arch/arm64/boot/dts/amlogic

flymike shared the available meson-gxbb-vega-s95-telos.dtb and u-boot-s905.bin of the Beelink-Mini-MX-2G s905 box in Issues

Using 5.10.x kernel and meson-gxbb-vega-s95-telos.dtb, Gigabit ethernet and WiFi work

You can upload your modified dtb file, and I will make a backup so that you can replace the test with the same user as you.
thanks for sharing.

atsdai · 2022-02-28T16:32:33Z

Hi, I will upload the dts if you want to compare it. meson-gxbb-vega-s95-telos_fix_MiniMX2GB16GB.dts.txt

I provide the data of my system in case it helps.
Armbian_22.02.0_Aml_s905_focal_5.10.101_2022.02.19.0130.img.gz

$uname -a
Linux armbian 5.10.102-flippy-70+ #202 SMP PREEMPT Wed Feb 23 19:47:27 CST 2022 aarch64 aarch64 aarch64 aarch64 GNU/Linux

P.S.: Sorry, I'm not an expert and I'm not fluent in English. In case I missed something.

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ophub · 2022-03-01T00:44:15Z

@atsdai Thank you for sharing

meson-gxbb-beelink-minimx-2g-16g.dtb.zip

This is compiled using your dts file, you can test whether it can be used. I have a warn when compiling, but it also compiles.

Instead of decompiling dtb, maybe you can make a copy of the standard source code and modify it. Did you just modify 1 place, changing 2 to 4?

https://github.com/unifreq/linux-5.15.y/blob/02659e48f0ec17cb78a01846719812bf0f30536e/arch/arm64/boot/dts/amlogic/meson-gxbb-vega-s95.dtsi#L178

atsdai · 2022-03-01T02:23:09Z

This is compiled using your dts file, you can test whether it can be used. I have a warn when compiling, but it also compiles.

Ok, I'll try it tomorrow.

Instead of decompiling dtb, maybe you can make a copy of the standard source code and modify it. Did you just modify 1 place, changing 2 to 4?

https://github.com/unifreq/linux-5.15.y/blob/02659e48f0ec17cb78a01846719812bf0f30536e/arch/arm64/boot/dts/amlogic/meson-gxbb-vega-s95.dtsi#L178

Yes, 2 to 4.

I got the idea for the solution from this post https://lore.kernel.org/linux-arm-kernel/e21320b3-6e99-25a4-20d9-e8c5aa1aff03@gmail.com/T/
Specifically with this information https://patchwork.ozlabs.org/patch/1215313/

I don't know if it's only with my Mini MX board or if it happens with all of them. I don't know if @flymike has tried doing an iperf3 to make sure the transmission (TX) is correct. Apparently the network was working, but it would instantly drop out or its performance was very bad.

I repeat, I am not an expert in these matters and I am groping a bit. In this case the flute has sounded :D (I don't know if it has been translated with the same meaning xD).

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ophub · 2022-03-01T02:28:53Z

meson-gxbb-beelink-mini-mx.dts.zip

I haven't modified dtb before, and I learned how to create a new dtb under the guidance of flippy in the morning. If you only modify this place, you can create a separate dts file and modify only one line of code, so that other parts of the code will be updated with the upstream for a long time.


// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
/*
 * meson-gxbb-beelink-mini-mx.dts
 * Copyright (c) 2022 atsdai, unifreq, ophub
 */

/dts-v1/;

#include "meson-gxbb-vega-s95.dtsi"

/ {
	compatible = "azw,mini-mx", "amlogic,meson-gxbb";
	model = "Beelink Mini MX";
};

&ethmac {

	amlogic,tx-delay-ns = <4>;

};

I used the source code to change a dtb for you, and the test passed. I will ask flippy to check again to see if this dtb can be added to his kernel.

ophub · 2022-03-01T02:36:31Z

Can this device only be used on USB/TF, and can't be written to emmc?

ophub · 2022-03-01T09:32:10Z

unifreq/linux-5.10.y@86fb0e9

Now this dtb has been added to the kernel source code of unifreq 5.4/5.10/5.15/5.16, you can use meson-gxbb-beelink-mini-mx.dtb in the future

738d19d
Thanks for sharing, I record it in the contributor list: https://github.com/ophub/amlogic-s9xxx-armbian/blob/main/CONTRIBUTOR.md

atsdai · 2022-03-01T11:50:07Z

Can this device only be used on USB/TF, and can't be written to emmc?

I have never tried from emmc. I always use USB/TF.

I haven't tried WiFi or BT either. The use of the box is as a server. If I can I'll try it tomorrow too (at least the WiFi).

If you only modify this place, you can create a separate dts file and modify only one line of code, so that other parts of the code will be updated with the upstream for a long time.

Ok, I got it. Thanks!

atsdai · 2022-03-01T12:03:57Z

I upload two images of the board.

atsdai · 2022-03-01T20:10:47Z

WiFi works, at a not very high speed, but it works.

iperf3 -c 192.168.0.1
Connecting to host 192.168.0.1, port 5201
[  5] local 192.168.0.2 port 24866 connected to 192.168.0.1 port 5201
[ ID] Interval           Transfer     Bitrate         Retr  Cwnd
[  5]   0.00-1.00   sec  2.61 MBytes  21.8 Mbits/sec    0   59.4 KBytes
[  5]   1.00-2.00   sec  2.24 MBytes  18.8 Mbits/sec    0   79.2 KBytes
[  5]   2.00-3.00   sec  2.24 MBytes  18.8 Mbits/sec    0   73.5 KBytes
[  5]   3.00-4.00   sec  1.86 MBytes  15.6 Mbits/sec    0   65.0 KBytes
[  5]   4.00-5.00   sec  2.61 MBytes  21.9 Mbits/sec    0   76.4 KBytes
[  5]   5.00-6.00   sec  1.86 MBytes  15.6 Mbits/sec    0   70.7 KBytes
[  5]   6.00-7.00   sec  2.24 MBytes  18.8 Mbits/sec    0   62.2 KBytes
[  5]   7.00-8.00   sec  1.86 MBytes  15.6 Mbits/sec    0   53.7 KBytes
[  5]   8.00-9.00   sec  2.24 MBytes  18.8 Mbits/sec    0   62.2 KBytes
[  5]   9.00-10.00  sec  2.24 MBytes  18.8 Mbits/sec    0   62.2 KBytes
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.00  sec  22.0 MBytes  18.4 Mbits/sec    0             sender
[  5]   0.00-10.01  sec  21.1 MBytes  17.7 Mbits/sec                  receiver

iperf Done.


iperf3 -c 192.168.0.1 -R
Connecting to host 192.168.0.1, port 5201
Reverse mode, remote host 192.168.0.1 is sending
[  5] local 192.168.0.2 port 24884 connected to 192.168.0.1 port 5201
[ ID] Interval           Transfer     Bitrate
[  5]   0.00-1.00   sec  3.82 MBytes  32.0 Mbits/sec
[  5]   1.00-2.00   sec  3.13 MBytes  26.3 Mbits/sec
[  5]   2.00-3.00   sec  4.38 MBytes  36.8 Mbits/sec
[  5]   3.00-4.00   sec  3.59 MBytes  30.1 Mbits/sec
[  5]   4.00-5.00   sec  4.43 MBytes  37.2 Mbits/sec
[  5]   5.00-6.00   sec  3.50 MBytes  29.3 Mbits/sec
[  5]   6.00-7.00   sec  4.29 MBytes  36.0 Mbits/sec
[  5]   7.00-8.00   sec  3.43 MBytes  28.8 Mbits/sec
[  5]   8.00-9.00   sec  4.48 MBytes  37.6 Mbits/sec
[  5]   9.00-10.00  sec  3.86 MBytes  32.3 Mbits/sec
- - - - - - - - - - - - - - - - - - - - - - - - -
[ ID] Interval           Transfer     Bitrate         Retr
[  5]   0.00-10.30  sec  41.6 MBytes  33.9 Mbits/sec    0             sender
[  5]   0.00-10.00  sec  38.9 MBytes  32.6 Mbits/sec                  receiver

iperf Done.

I'm trying to get bluetooth to work, because I can't make it visible to other devices, nor can I discover other devices.

ophub · 2022-03-02T03:18:44Z

armbian-config
enable bluetooth

tri-pole · 2022-04-21T12:13:14Z

The dtb fix amlogic,tx-delay-ns = <4> also works for Ugoos AM6 plus which also has RTL8211F phy. It makes the 1G wired connection stable (before the fix I usually ran the wired connection with 100Mbps to get stability).

(There have been a lot of discussions about the RTL8211F on the mailing lists over at patchwork.kernel.org, including the RX/TX delays, but I never saw anything really resolving it for my Ugoos, but this fix apparently did.)

ophub · 2022-04-21T12:25:29Z

Ugoos AM6 plus which dtb did you use?
meson-g12b-ugoos-am6.dtb?

tri-pole · 2022-04-21T12:27:25Z

Yes, from your 5.17.2 kernel build (but I actually run a Manjaro 5.14 kernel, since I mainly run Manjaro on my Ugoos)

ophub · 2022-04-21T12:28:19Z

ok. Test if 5.10/5.15 is stable after modification

tri-pole · 2022-04-21T12:59:06Z

I have tested your 5.10.111 (with the 5.17.2 dtb) and it is stable (I can only test up to 200Mbit download; no errors or resets in dmesg). I cannot boot 5.15 from my SD card (it is a common problem I have with newer kernels above, say 5.14, possibly due to my chain loading using (hexdump's) u-boot.ext).

ophub · 2022-04-21T13:05:56Z

Ok, thanks for sharing the test results

atsdai · 2022-04-21T16:46:19Z

The dtb fix amlogic,tx-delay-ns = <4> also works for Ugoos AM6 plus which also has RTL8211F phy. It makes the 1G wired connection stable (before the fix I usually ran the wired connection with 100Mbps to get stability).

(There have been a lot of discussions about the RTL8211F on the mailing lists over at patchwork.kernel.org, including the RX/TX delays, but I never saw anything really resolving it for my Ugoos, but this fix apparently did.)

I am very glad you found my contribution useful. :)

ophub · 2022-04-22T01:41:25Z

@tri-pole
Is your device s905x3?
Please submit your dmesg results and ifconfig results

unifreq recommends referring to this document to adjust parameters:
https://github.com/unifreq/linux-5.15.y/blob/main/Documentation/devicetree/bindings/net/amlogic%2Cmeson-dwmac.yaml

&ethmac {
  phy-mode = "rgmii";
  /delete-property/ rx-internal-delay-ps;
  amlogic,tx-delay-ns = <2>;  /* 0,2,4,6 */
};

or

&ethmac {
  phy-mode = "rgmii-txid";
  /delete-property/ amlogic,tx-delay-ns;
  rx-internal-delay-ps = <800>;  
  /* if compatible = amlogic,meson-g12a-dwmac: 0 to 3000, step 200 */
  /* else 0 or 2000 */
};

tri-pole · 2022-05-21T07:21:34Z

Sorry, I didn't see your latest post above.

I'm running a different distro now with kernel 5.14.10-1-MANJARO-ARM and I don't have the ifconfig command but I use the meson-g12b-ugoos-am6.dtb from from your 5.17.2 kernel build with the amlogic,tx-delay-ns = <4> fix and the 1GB connection is stable.

Here is some info about my AM6 plus box with s922 SoC:

# dmesg | head -n600 | egrep -i "(AM6|Amlogic|eth|dwmac|1Gb)"
[    0.000000] Machine model: Ugoos AM6
[    0.000000] psci: probing for conduit method from DT.
[    2.890044] soc soc0: Amlogic Meson G12B (S922X) Revision 29:b (40:2) Detected
[    4.808360] meson8b-dwmac ff3f0000.ethernet: IRQ eth_wake_irq not found
[    4.814384] meson8b-dwmac ff3f0000.ethernet: IRQ eth_lpi not found
[    4.820586] meson8b-dwmac ff3f0000.ethernet: PTP uses main clock
[    4.826912] meson8b-dwmac ff3f0000.ethernet: User ID: 0x11, Synopsys ID: 0x37
[    4.833527] meson8b-dwmac ff3f0000.ethernet:         DWMAC1000
[    4.838712] meson8b-dwmac ff3f0000.ethernet: DMA HW capability register supported
[    4.846121] meson8b-dwmac ff3f0000.ethernet: RX Checksum Offload Engine supported
[    4.853535] meson8b-dwmac ff3f0000.ethernet: COE Type 2
[    4.858713] meson8b-dwmac ff3f0000.ethernet: TX Checksum insertion supported
[    4.865699] meson8b-dwmac ff3f0000.ethernet: Wake-Up On Lan supported
[    4.872107] meson8b-dwmac ff3f0000.ethernet: Normal descriptors
[    4.877948] meson8b-dwmac ff3f0000.ethernet: Ring mode enabled
[    4.883722] meson8b-dwmac ff3f0000.ethernet: Enable RX Mitigation via HW Watchdog Timer
[   11.811168] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[   13.613898] meson8b-dwmac ff3f0000.ethernet eth0: PHY [0.0:00] driver [RTL8211F Gigabit Ethernet] (irq=37)
[   13.619359] meson8b-dwmac ff3f0000.ethernet eth0: Register MEM_TYPE_PAGE_POOL RxQ-0
[   13.633879] meson8b-dwmac ff3f0000.ethernet eth0: No Safety Features support found
[   13.635790] meson8b-dwmac ff3f0000.ethernet eth0: PTP not supported by HW
[   13.642699] meson8b-dwmac ff3f0000.ethernet eth0: configuring for phy/rgmii link mode
[   16.321812] meson8b-dwmac ff3f0000.ethernet eth0: Link is Up - 1Gbps/Full - flow control rx/tx
[   16.324828] IPv6: ADDRCONF(NETDEV_CHANGE): eth0: link becomes ready

# ethtool eth0
Settings for eth0:
        Supported ports: [ TP    MII ]
        Supported link modes:   10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Supported pause frame use: Symmetric Receive-only
        Supports auto-negotiation: Yes
        Supported FEC modes: Not reported
        Advertised link modes:  10baseT/Half 10baseT/Full
                                100baseT/Half 100baseT/Full
                                1000baseT/Full
        Advertised pause frame use: Symmetric Receive-only
        Advertised auto-negotiation: Yes
        Advertised FEC modes: Not reported
        Link partner advertised link modes:  10baseT/Half 10baseT/Full
                                             100baseT/Half 100baseT/Full
                                             1000baseT/Full
        Link partner advertised pause frame use: Symmetric Receive-only
        Link partner advertised auto-negotiation: Yes
        Link partner advertised FEC modes: Not reported
        Speed: 1000Mb/s
        Duplex: Full
        Auto-negotiation: on
        master-slave cfg: preferred slave
        master-slave status: master
        Port: Twisted Pair
        PHYAD: 0
        Transceiver: external
        MDI-X: Unknown

When I get time I will try your recommendation from unifreq and add also some rx-internal-delay-ps (but right now it does not seem to be needed).

ophub · 2022-05-21T10:09:43Z

ok

ophub added the support This need is supported label Feb 28, 2022

ophub closed this as completed Mar 3, 2022

ophub added the new box Research Fills in the Blanks label Nov 27, 2022

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Beelink-Mini-MX-2G RTL8211F Ethernet TX fix #127

Beelink-Mini-MX-2G RTL8211F Ethernet TX fix #127

atsdai commented Feb 27, 2022

ophub commented Feb 28, 2022 •

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ophub commented May 21, 2022

Beelink-Mini-MX-2G RTL8211F Ethernet TX fix #127

Beelink-Mini-MX-2G RTL8211F Ethernet TX fix #127

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