[RFC v3 0/8] drm/msm: GPU crash state

[Jordan Crouse]

This is revision 3 of my stack implementing a GPU crash state for drm/msm
(https://patchwork.freedesktop.org/series/36097/).

The goal is to store and provide enough information to debug software
and hardware issues on the Adreno hardware in a semi human-readable
format that can also be parsed by scripts.

So far this is a relatively basic dump of registers and data but future patches
will add more details and target specific information.

You can see an example of the output for a simple invalid opcode error on the
db820c here: https://hastebin.com/olaruyakaz.bash

v3: Make recommended changes to ascii85 per Chris Wilson. Use devcoredump to
dump crash states as suggested by Bjorn Andersson and add a new drm_print
facility to facilitate that. Remove the now obsolete 'crash' debugfs node.
Add documentation for the crash dump output.

v2: Convert output to yaml, use ascii85 to dump ringbuffer contents.

Jordan Crouse (8):
  include: Move ascii85 functions from i915 to linux/ascii85.h
  drm: drm_printer: Add printer for devcoredump
  drm/msm/gpu: Capture the state of the GPU
  drm/msm/gpu: Convert the GPU show function to use the GPU state
  drm/msm/gpu: Capture the GPU state on a GPU hang
  drm/msm/adreno: Convert the show/crash file format
  drm/msm/adreno: Add ringbuffer data to the GPU state
  drm/msm/adreno: Add a5xx specific registers for the GPU state

 Documentation/gpu/drm-msm-crash-dump.txt |  34 +++++
 drivers/gpu/drm/drm_print.c              |  54 +++++++
 drivers/gpu/drm/i915/i915_gpu_error.c    |  38 +----
 drivers/gpu/drm/msm/Kconfig              |   1 +
 drivers/gpu/drm/msm/adreno/a3xx_gpu.c    |  28 ++--
 drivers/gpu/drm/msm/adreno/a4xx_gpu.c    |  20 ++-
 drivers/gpu/drm/msm/adreno/a5xx_gpu.c    | 239 +++++++++++++++++++++++++++++--
 drivers/gpu/drm/msm/adreno/adreno_gpu.c  | 146 ++++++++++++++++---
 drivers/gpu/drm/msm/adreno/adreno_gpu.h  |   7 +-
 drivers/gpu/drm/msm/msm_debugfs.c        |  24 +++-
 drivers/gpu/drm/msm/msm_gpu.c            | 103 +++++++++++--
 drivers/gpu/drm/msm/msm_gpu.h            |  58 +++++++-
 include/drm/drm_print.h                  |  27 ++++
 include/linux/ascii85.h                  |  39 +++++
 14 files changed, 721 insertions(+), 97 deletions(-)
 create mode 100644 Documentation/gpu/drm-msm-crash-dump.txt
 create mode 100644 include/linux/ascii85.h

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1.9.1