[Bug 97504] Enabling SDMA on CIK (0241d8300f66ee2c6c2c55fe64ac88d76440c591) causes corruption on a mobile Bonaire with AMDGPU DDX / video desktop recording

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97504

            Bug ID: 97504
           Summary: Enabling SDMA on CIK
                    (0241d8300f66ee2c6c2c55fe64ac88d76440c591) causes
                    corruption on a mobile Bonaire with AMDGPU DDX / video
                    desktop recording
           Product: DRI
           Version: unspecified
          Hardware: Other
                OS: All
            Status: NEW
          Severity: normal
          Priority: medium
         Component: DRM/AMDgpu
          Assignee: dri-devel at lists.freedesktop.org
          Reporter: shawn.starr at rogers.com

With latest agd5f drm-fixes-4.8 / drm-next-4.9-wip + Linus master kernel:

Latest git mesa master with SDMA enabled on CIK patch:

1) AMDGPU DDX shows squared corruption, X locks up
2) Using vlc desktop recording / vokoscreen desktop recording get corrupted
video recording

Kernel spits out GPUVPM faults:

[ 6612.359198] amdgpu 0000:01:00.0: GPU fault detected: 146 0x0248770c
[ 6612.359199] amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_ADDR  
0x0010C836
[ 6612.359199] amdgpu 0000:01:00.0:   VM_CONTEXT1_PROTECTION_FAULT_STATUS
0x0807700C
[ 6612.359200] VM fault (0x0c, vmid 4) at page 1099830, read from 'SDM0'
(0x53444d30) (119)

  Revert "radeonsi: enable SDMA on CIK"

    This reverts commit 0241d8300f66ee2c6c2c55fe64ac88d76440c591.


When reverted problems go away.

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