[SRU][E][PATCH 0/3] i915 hang fixes backported to 5.3

[Sultan Alsawaf]

BugLink: https://bugs.launchpad.net/bugs/1872001

[Impact]
Users of i915 on 5.3 experience GPU hangs.

[Test]
Seems to happen often when using a Chromium-based browser with hardware
acceleration enabled.

[Fix]
Arighi backported three relevant fixes from upstream to fix the issue. I pulled
them from https://git.launchpad.net/~arighi/+git/eoan-linux/log/?h=lp-1861395

[Regression Potential]
High, but these patches do seem to fix the problem.

Sultan

Chris Wilson (3):
  drm/i915/execlists: Preempt-to-busy
  drm/i915/gt: Detect if we miss WaIdleLiteRestore
  drm/i915/execlists: Always force a context reload when rewinding
    RING_TAIL

 drivers/gpu/drm/i915/gem/i915_gem_context.c   |   2 +-
 drivers/gpu/drm/i915/gt/intel_context_types.h |   5 +
 drivers/gpu/drm/i915/gt/intel_engine.h        |  70 +-
 drivers/gpu/drm/i915/gt/intel_engine_cs.c     |  63 +-
 drivers/gpu/drm/i915/gt/intel_engine_types.h  |  61 +-
 drivers/gpu/drm/i915/gt/intel_lrc.c           | 716 ++++++++----------
 drivers/gpu/drm/i915/gt/intel_ringbuffer.c    |   2 +
 drivers/gpu/drm/i915/i915_gpu_error.c         |  19 +-
 drivers/gpu/drm/i915/i915_request.c           |   6 +
 drivers/gpu/drm/i915/i915_request.h           |   1 +
 drivers/gpu/drm/i915/i915_scheduler.c         |   3 +-
 drivers/gpu/drm/i915/i915_utils.h             |  12 +
 drivers/gpu/drm/i915/intel_guc_submission.c   | 175 ++---
 drivers/gpu/drm/i915/selftests/i915_request.c |   8 +-
 14 files changed, 522 insertions(+), 621 deletions(-)

-- 
2.20.1