[Bug 100979] Radeon r4 on a6-6310(BEEMA) APU hard lockup on hibernate and on second resume from suspend

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=100979

            Bug ID: 100979
           Summary: Radeon r4 on a6-6310(BEEMA) APU hard lockup on
                    hibernate and on second resume from suspend
           Product: DRI
           Version: DRI git
          Hardware: x86-64 (AMD64)
                OS: Linux (All)
            Status: NEW
          Severity: major
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: soprwa at gmail.com

I'm using kernel 4.11 on gentoo with SI/CIK enabled on Lenovo G50-45 Notebook.
Machine has AMD APU A6 6130 with Radeon r4 graphics card (Beema/Mullins). This
CPU supports olny AMD IOMMU v1. There is no discrete graphic card on it, APU
only.

When I try to hibernate this notebook it doesn't turning off. I have to press
power button to reboot the machine. Similar situation is on "radeon" driver,
and I had submitted bug report about this on kernel's bugzilla:

https://bugzilla.kernel.org/show_bug.cgi?id=191571

But in this situation I'm unable to bisect because as I remember correctly
problem always occur on amdgpu driver, so I think those two can correlate with
each other. (dmesg form hibernation process attached).

As for suspend.
I can suspend/resume machine successfully only once in a row. Second time
machine suspends correctly, but on resume I have hard lockup, fans are spinning
on full rpm's and I cannot do anything but pressing power button to reboot(cold
boot) the netbook.
Moreover in dmesg after first suspend I've got error messages:

[drm:amdgpu_atombios_dp_link_train [amdgpu]] *ERROR* displayport link status
failed
[drm:amdgpu_atombios_dp_link_train [amdgpu]] *ERROR* clock recovery failed

Attachments:
1. Log after clean start.
2. Kernel's config file.
3. Log after hibernation process.
4. Log after first suspend/resume.
5. Log after second suspend/resume.

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