https://bugzilla.kernel.org/show_bug.cgi?id=199959
--- Comment #23 from Alexander Mezin (mezin.alexander@gmail.com) --- (In reply to Christian König from comment #22)
Your debugging efforts are better than mine.
Please provide the output of "sudo setpci -s 65:00.0 ECAP15.l ECAP15+4.l ECAP15+8.l" once before suspend and once after suspend without any changes (e.g. when the problem happens).
before suspend: 27010015 0003f000 00000d20
after resume: 27010015 0003f000 00000820