svn commit: r362736 - head/sys/arm64/rockchip

[Peter Jeremy]

On 2020-Jun-28 21:11:10 +0000, Oleksandr Tymoshenko <gonzo at FreeBSD.org> wrote:
>Log:
>  Configure rx_delay/tx_delay values for RK3399/RK3328 GMAC
>  
>  For 1000Mb mode to work reliably TX/RX delays need to be configured
>  between the TX/RX clock and the respective signals on the PHY
>  to compensate for differing trace lengths on the PCB.

This breaks (at least) diskless booting on my Rock64.

During boot, I normally see:
regulator: shutting down unused regulators
uhub1: 1 port with 1 removable, self powered
uhub0: 2 ports with 2 removable, self powered
uhub2: 1 port with 1 removable, self powered
uhub3: 1 port with 1 removable, self powered
dwc0: link state changed to DOWN
NFS ROOT: 192.168.12.200:/tank/rock64
dwc0: link state changed to UP
Warning: no time-of-day clock registered, system time will not be set accurately
Warning: no time-of-day clock registered, system time will not be set accurately
start_init: trying /sbin/init

With r362736, I see:
setting RK3328 RX/TX delays:  24/36
...
regulator: shutting down unused regulators
uhub0: 1 port with 1 removable, self powered
uhub3: 2 ports with 2 removable, self powered
uhub2: 1 port with 1 removable, self powered
uhub1: 1 port with 1 removable, self powered
dwc0: link state changed to DOWN
NFS ROOT: 192.168.12.200:/tank/rock64
dwc0: link state changed to UP
dwc0: link state changed to DOWN
dwc0: link state changed to UP
[Nothing further until I push the reset button]

The system doesn't respond to pings so I suspect the network is dead.
Normally, it runs 1000baseT <full-duplex,master>.

-- 
Peter Jeremy
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