Gigabit ethernet regression apalis-imx6 - not working with u-boot b66337d

Technical Support
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1

Gigabit ethernet is not working correctly in apalis imx6 with evaluation board with latest toradex u-boot b66337d. It is working correctly in fast ethernet or with u-boot 06ee8db.

error log:

Loading: error frame: 0x8e08c800 0x00000806
error frame: 0x8e08ce40 0x00000806
error frame: 0x8e08dac0 0x00000806
error frame: 0x8e08e740 0x00000806
T error frame: 0x8e0925c0 0x00000806
error frame: 0x8e092c00 0x00000806
error frame: 0x8e093880 0x00000806
error frame: 0x8e094500 0x00000806
T error frame: 0x8e099c80 0x00000806
error frame: 0x8e09a2c0 0x00000806
error frame: 0x8e09a900 0x00000806
error frame: 0x8e09b580 0x00000806

The regression was introduced with commit 8b03bc9. Tftp server currently used is atftpd on debian/stable without any special command line option (default install).

Any idea?
Thanks
Francesco

2

Hi Francesco

Yes, we noticed the behaviour also but only on HW with good Ethernet performance but do not have a solution fixing it’s root cause.
I believe that commit 8b03bc9 is not really the culprit but that with this commit we trigger the error in U-Boot’s Ethernet stack.

error frame: 0x8e09a2c0 0x00000806 is logged by the fec driver with 0x00000806 meaning receiver overrun.

As a workaround you could reduce CONFIG_TFTP_BLOCKSIZE in include/configs/apalis_imx6.h to something working in your configuration, probably 2048 or 4096.

Max