[Bug 93615] Tonga does not recover from standby

[Bug 93615] Tonga does not recover from standby

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https://bugs.freedesktop.org/show_bug.cgi?id=93615

            Bug ID: 93615
           Summary: Tonga does not recover from standby
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: blocker
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: EoD@xmw.de

Standby worked flawlessly on my BARTS (radeon/r600). With the TONGA
(amdgpu/radeonsi) the system is not able to recover after the standby. Seems
like a hard-lockup.

I put my system into standby by doing:
  echo mem > /sys/power/state

I tried both kernel 4.4-rc7 and the 4.5-drm-next branch.

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[Bug 93615] Tonga does not recover from standby

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https://bugs.freedesktop.org/show_bug.cgi?id=93615

--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
Does it work any better with the latest code in:
http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-next-4.5-wip

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[Bug 93615] Tonga does not recover from standby

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https://bugs.freedesktop.org/show_bug.cgi?id=93615

--- Comment #2 from EoD <EoD@xmw.de> ---
(In reply to Alex Deucher from comment #1)
> Does it work any better with the latest code in:
> http://cgit.freedesktop.org/~agd5f/linux/log/?h=drm-next-4.5-wip

Yes, there are improvements:

When I go into standby in a virtual terminal it can recover, but still writing
the following error to dmesg:

kernel: PM: resume of devices complete after 6591.636 msecs
kernel: Restarting tasks ... done.
kernel: amdgpu 0000:01:00.0: GPU fault detected: 147 0x0f080008
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR   0x001001E1
kernel: amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS 0x02000008
kernel: VM fault (0x08, vmid 1) at page 1049057, read from 'TC2' (0x54433200)
(0)

When I switch back to X11 the system locks up, but unlike before I still can
execute SysRq.

This is a major improvement to the drm-next-4.5 branch!

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[Bug 93615] Tonga does not recover from standby

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https://bugs.freedesktop.org/show_bug.cgi?id=93615

--- Comment #3 from EoD <EoD@xmw.de> ---
I tried standby again by accident and it seems to work just fine now.

I am using drm-next on commit d8e0cae645504a787b05abfb91afee8cd7fa1701, kernel
4.4.0-rc6-gd8e0cae.

Did my change some stuff on my bios by accident (IOMMU?) or did you fix it in
the recent kernel?

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[Bug 93615] Tonga does not recover from standby

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https://bugs.freedesktop.org/show_bug.cgi?id=93615

EoD <EoD@xmw.de> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
         Resolution|---                         |FIXED

--- Comment #4 from EoD <EoD@xmw.de> ---
This has been fixed in kernel 4.5-rc2.

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