[Bug 284510] Kernel Panic when testing OpenCL with amdgpu discrete graphic

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=284510

            Bug ID: 284510
           Summary: Kernel Panic when testing OpenCL with amdgpu discrete
                    graphic
           Product: Ports & Packages
           Version: Latest
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: Individual Port(s)
          Assignee: ports-bugs@FreeBSD.org
          Reporter: maulanahirzan@gmail.com

Created attachment 257172
  --> https://bugs.freebsd.org/bugzilla/attachment.cgi?id=257172&action=edit
dmesg output from boot to kernel panic

I have a Thinkpad E480 with Radeon RX550 (Polaris 12) discrete graphic. So far
there is no problem with the integrated gpu (in this case is Intel UHD 620).
Thus, I want to test the discrete GPU. I installed
gpu-firmware-amd-kmod-polaris12 as the driver for my dgpu. 

Everything is good until I do four things on my laptop: 
1) Running clinfo command, 
2) Closing Python's Interpreter after accessing OpenCL via pyopencl, 
3) Running chromium for several minutes (this only occurred when amdgpu is
loaded), and 
4) Checking graphic information using KInfoCenter. 

These four actions raised kernel panic and force rebooting my laptop. I have
included the latest dmesg output with kernel panic information. I with I can
upload my dump core here, but the filesize is 1GB.

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