[Intel-gfx] [PATCH 00/12] MMIO workaround list

Mika Kuoppala mika.kuoppala at linux.intel.com
Tue Oct 6 07:26:41 PDT 2015


This series was inspired by founding out:
and that we still lose some of the workarounds after
reset/suspend cycle. We did build a list for LRI emitted
workarounds in past to combat this same issue and checked that
contexts retain wa registers with igt/gem_workarounds.

This series expands the same mechanism to keep track of
mmio workarounds across reset/resume and gain test coverage
with gem_workarounds.

So 8/12 is the crux of the series, by curing the possible
system hang after any recoverable gpu hang. But I have also
moved few other gens to use the mmio workaround list as an example.
And also because I noticed that with ivybridge we also lose few
registers on reset. If this is the path to go, more gens can be

There was temptation to move the workaround list code and
also the buildup of lists to a separate file. But as Arun
has/had large series of WAs in flight, I decided not to.

Mika Kuoppala (12):
  drm/i915: Prepare for multiple workaround lists
  drm/i915: Raise the amount of workarounds one list has
  drm/i915: Don't return inside WA_REG macro
  drm/i915: Move workaround macros to i915_drv.h
  drm/i915: Specify the wa list in WA_* macros
  drm/i915: Introduce mmio workaround list
  drm/i915: Write mmio workarounds after gpu reset
  drm/i915: Use mmio workaround list for skl/bxt
  drm/i915/bdw: Use mmio workarounds in init clock gating
  drm/i915/hsw: Use mmio workarounds in init clock gating
  drm/i915/ivb: Use mmio workarounds in init clock gating
  drm/i915/ivb: Simplify row chicken setup logic

 drivers/gpu/drm/i915/i915_debugfs.c     |  41 ++++--
 drivers/gpu/drm/i915/i915_drv.h         |  45 ++++++-
 drivers/gpu/drm/i915/i915_irq.c         |   2 +
 drivers/gpu/drm/i915/i915_reg.h         |   2 +-
 drivers/gpu/drm/i915/intel_lrc.c        |   2 +-
 drivers/gpu/drm/i915/intel_pm.c         | 231 +++++++++++++++++---------------
 drivers/gpu/drm/i915/intel_ringbuffer.c | 103 ++++++--------
 drivers/gpu/drm/i915/intel_uncore.c     |  12 ++
 8 files changed, 251 insertions(+), 187 deletions(-)


More information about the Intel-gfx mailing list