I have Olimex A20-SOM and make mainboard for it. On mainboard I have Ethernet PHY ksz9021rl connected to A20 thougth rgmii on pins A. Something wrong in RGMII TX. I checked analog part with remote loopback it works fine. RX works fine at 100 and 1000 speed full duplex. But In TX i have excess byte at the end, which spoils CRC. I can see it in Wireshark. But without Wireshark PC dont recieve packets becouse bad crc. Soft that i use OpenWRT. With olimex A20-SOM-EVB all works fine. But they use Realtek RTL8211 PHY. Any body know what can be wrong?
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