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[0/8] drm/i915: Provide more information on display faults

Message ID 20250116174758.18298-1-ville.syrjala@linux.intel.com (mailing list archive)
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Series drm/i915: Provide more information on display faults | expand

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Ville Syrjala Jan. 16, 2025, 5:47 p.m. UTC 
From: Ville Syrjälä <ville.syrjala@linux.intel.com>

Currently we just print a hardware specific bitmask when
encountering any kind of display fault error. To make these
errors a bit easier to decode (and perhps even analyze)
I now decode the actual bits, and for plane faults provide
a dump of a few (hopefully) relevant plane registers (CTL,
SURF,SURFLIVE for now, which should at least help with faults
cause by bad GTT alignment).

So far we only reported faults on bdw+, but I'm also hooking
this stuff up for all ilk+ and vlv/chv. The older gmch
platforms I left out for now, but I think i965/g4x should
at least be diable in the future.

Not sure I'm 100% satisfied with how the pipe_fault_handler 
thing is structured, but at least it works.

Ville Syrjälä (8):
  drm/i915: Add missing else to the if ladder in missing else
  drm/i915: Introduce a minimal plane error state
  drm/i915: Pimp display fault reporting
  drm/i915: Hook in display GTT faults for IVB/HSW
  drm/i915: Hook in display GTT faults for ILK/SNB
  drm/i915: Introduce i915_error_regs
  drm/i915: Un-invert {i9xx,i965}_error_mask()
  drm/i915: Hook up display fault interrupts for VLV/CHV

 drivers/gpu/drm/i915/display/i9xx_plane.c     |  41 ++
 .../gpu/drm/i915/display/intel_atomic_plane.c |   2 +-
 .../gpu/drm/i915/display/intel_atomic_plane.h |   2 +
 drivers/gpu/drm/i915/display/intel_cursor.c   |  26 ++
 .../gpu/drm/i915/display/intel_display_irq.c  | 392 +++++++++++++++++-
 .../gpu/drm/i915/display/intel_display_irq.h  |   3 +
 .../drm/i915/display/intel_display_types.h    |   7 +
 drivers/gpu/drm/i915/display/intel_sprite.c   |  36 ++
 .../drm/i915/display/skl_universal_plane.c    |  12 +
 drivers/gpu/drm/i915/i915_irq.c               |  61 ++-
 drivers/gpu/drm/i915/i915_irq.h               |   4 +
 drivers/gpu/drm/i915/i915_reg.h               |  34 ++
 drivers/gpu/drm/i915/i915_reg_defs.h          |   8 +
 drivers/gpu/drm/xe/display/ext/i915_irq.c     |  23 +
 14 files changed, 632 insertions(+), 19 deletions(-)