[Bug 97054] [APL] GPU hang after resume while executing - gem_softpin at noreloc-s4

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=97054

--- Comment #1 from yann <yann.argotti at intel.com> ---
>From this error dump, in render ring 
  HEAD:  0x00200d38
    head = 0x00000d38, wraps = 1
  TAIL:  0x00000d38
  ACTHD: 0x00000000 00200d38
    at ring: 0x00000000
  IPEIR: 0x00000000
  IPEHR: 0x00000000
 ...
 seqno: 0x000000b0
 last_seqno: 0x000000b1

and in the trace

render ring --- 1 requests
  seqno 0x000000b1, emitted 4294963764, tail 0x00000d18
render ring --- 1 waiters
 seqno 0x000000b1 for gem_softpin [1548]
ring buffer (render ring) at 0x00000000_00912000; HEAD points to:
0x00000000_00912d38
0x00912000:      0x383b6b0a: UNKNOWN
0x00912004:      0x789b6dba: 3D UNKNOWN: 3d_965 opcode = 0x789b
0x00912008:      0x482b6b2a: 2D UNKNOWN
0x0091200c:      0x6b2e4d2a: 3D UNKNOWN: 3d_965 opcode = 0x6b2e

Could it be a synchronization issue seqno is gt last_seqno in render ring?

Jairo, can you replay with latest kernel and attached dmesg and new dump if it
occurs again?

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