[0/7] Improve GPU Recovery

Message

Akhil P Oommen July 7, 2022, 4:10 p.m. UTC

Recently, I have debugged a few device crashes which occured during
a recovery after a hangcheck timeout. It looks like there are a few
things we can do to improve our chance at a successful gpu recovery.

First one is to ensure that CX GDSC collapses which clears the internal
states in gpu's CX domain. First 5 patches tries to handle this.

Rest of the patches are to ensure that few internal blocks like CP, GMU
and GBIF are halted properly before proceeding for a snapshot followed by
recovery. Also, handle 'prepare slumber' hfi failure correctly. These
are A6x specific improvements.


Akhil P Oommen (7):
  drm/msm: Remove unnecessary pm_runtime_get/put
  drm/msm: Correct pm_runtime votes in recover worker
  drm/msm: Fix cx collapse issue during recovery
  drm/msm: Ensure cx gdsc collapse during recovery
  arm64: dts: qcom: sc7280: Update gpu register list
  drm/msm/a6xx: Improve gpu recovery sequence
  drm/msm/a6xx: Handle GMU prepare-slumber hfi failure

 arch/arm64/boot/dts/qcom/sc7280.dtsi  |  6 ++-
 drivers/gpu/drm/msm/adreno/a6xx.xml.h |  4 ++
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c | 83 ++++++++++++++++++++++-------------
 drivers/gpu/drm/msm/adreno/a6xx_gpu.c | 36 +++++++++++++--
 drivers/gpu/drm/msm/msm_gpu.c         |  9 ++--
 drivers/gpu/drm/msm/msm_gpu.h         |  1 +
 drivers/gpu/drm/msm/msm_ringbuffer.c  |  4 --
 7 files changed, 100 insertions(+), 43 deletions(-)