Spontaneous reboots when using RX 560

[Sylvain Munaut]

Hi All,

More testing over the last few days showed that only either the lowest
power mode, or slightly above can work. Oh, I also tested 5.4-rc3 just
in case but same results.
It doesn't seem to be the affected by PCIe lane speed, Memory seems
stable at 625M and almost at 1500M (only the sustained heavy workload
eventually bring it down), but the SoC speed seems pretty touchy.

So that would seem to confirm something is wrong either in the power
play table itself, or its interpretation by the linux driver.
I tried brute-loading some other RX570 pptable into it, but that
didn't really do much. After writing it to pp_table, the card was
stuck at its lower clock mode. Working fine, but same as if I had
forced it to low power.

Is there anyway to extract the power play table from windows since
it's running fine there ?
I'm kind of running out of idea of what to try next.

Cheers,

    Sylvain