[Bug 100304] [bisected] Kernel oops on startup

[Bug 100304] [bisected] Kernel oops on startup

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https://bugs.freedesktop.org/show_bug.cgi?id=100304

            Bug ID: 100304
           Summary: [bisected] Kernel oops on startup
           Product: DRI
           Version: DRI git
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel@lists.freedesktop.org
          Reporter: mike@fireburn.co.uk

Created attachment 130353
  --> https://bugs.freedesktop.org/attachment.cgi?id=130353&action=edit
Screen shot

Bisected back to:

2d38d25554b739b50eec254205f769580751fb02 is the first bad commit
commit 2d38d25554b739b50eec254205f769580751fb02
Author: David Panariti <David.Panariti@amd.com>
Date:   Mon Mar 13 13:33:18 2017 -0400

    drm/amdgpu: Switch baremetal to use KIQ for compute ring management.

    KIQ is the Kernel Interface Queue for managing the MEC.  Rather than
setting
    up rings via direct MMIO of ring registers, the rings are configured via
    special packets sent to the KIQ.  The allows the MEC to better manage
shared
    resources and certain power events.

    Signed-off-by: David Panariti <David.Panariti@amd.com>
    Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
    Acked-by: Tom St Denis <tom.stdenis@amd.com>
    Signed-off-by: Alex Deucher <alexander.deucher@amd.com

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[Bug 100304] [bisected] Kernel oops on startup

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https://bugs.freedesktop.org/show_bug.cgi?id=100304

--- Comment #1 from Alex Deucher <alexdeucher@gmail.com> ---
What chip is this?

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[Bug 100304] [bisected] Kernel oops on startup

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https://bugs.freedesktop.org/show_bug.cgi?id=100304

--- Comment #2 from Alex Deucher <alexdeucher@gmail.com> ---
does disabling runpm work around it?

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[Bug 100304] [bisected] Kernel oops on startup

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https://bugs.freedesktop.org/show_bug.cgi?id=100304

Mike Lothian <mike@fireburn.co.uk> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |mike@fireburn.co.uk

--- Comment #3 from Mike Lothian <mike@fireburn.co.uk> ---
This is on Tonga in a prime setup

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[Bug 100304] [bisected] Kernel oops on startup

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https://bugs.freedesktop.org/show_bug.cgi?id=100304

--- Comment #4 from Mike Lothian <mike@fireburn.co.uk> ---
Yes setting amdgpu.runpm=0 fixes the issue - also reverting the commit allows
me to boot

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[Bug 100304] [bisected] Kernel oops on startup

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https://bugs.freedesktop.org/show_bug.cgi?id=100304

--- Comment #5 from Alex Deucher <alexdeucher@gmail.com> ---
Created attachment 130399
  --> https://bugs.freedesktop.org/attachment.cgi?id=130399&action=edit
possible fix

This should fix the issue.

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[Bug 100304] [bisected] Kernel oops on startup

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https://bugs.freedesktop.org/show_bug.cgi?id=100304

--- Comment #6 from Mike Lothian <mike@fireburn.co.uk> ---
Thanks, that's working great for me

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[Bug 100304] [bisected] Kernel oops on startup

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https://bugs.freedesktop.org/show_bug.cgi?id=100304

Alex Deucher <alexdeucher@gmail.com> changed:

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

--- Comment #7 from Alex Deucher <alexdeucher@gmail.com> ---
fix squashed into the original patch.

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