[Intel-gfx] [PATCH 0/6] drm/i915: Implement gen3/4 GPU reset

[ville.syrjala at linux.intel.com]

From: Ville Syrjälä <ville.syrjala at linux.intel.com>

This is a respin of my earlier gen3/4 GPU reset patches. Ken was complaining
about the lack of reset on gen4 and I pointed him at my branch, which he used
with some success.

I had to do a bit of rebasing on the patches, but I left Ken's tested-by in
place. Originally we had irq disable/enable in the common codepath but that
has since disappeared so I added something for that in the gen3/4 codepath.
Works for me so I think the tested-by is still valid.

The new thing with this series is the whole modeset_lock stuff, which cures
a lot of dmesg warnings from the modeset code. Deadlocks have historically
been a problem with this stuff. I'm hoping I didn't introduce any new ones,
but this could certainly use someone else thinking through it as well.

My 946GZ seems quite happy with this. Only some spurious crc irq warnings and
a few vblank sequence number oddities left when I rung through the igt
reset/hang tests. I didn't spend any time really looking at those. I was sort
of hoping the crtc_disable thing might have fixed the vblank stuff, but no
such luck.

Pushed here:
git://gitorious.org/vsyrjala/linux.git gpu_reset_fixes_7

Ville Syrjälä (6):
  drm/i915: Fix gen4 GPU reset
  drm/i915: Restore the display config after a GPU reset on gen4
  drm/i915: Implement GPU reset for 915/945
  drm/i915: Implement GPU reset for g33
  drm/i915: Grab modeset locks for GPU rest on pre-ctg
  drm/i915: Disable crtcs gracefully before GPU reset on gen3/4

 drivers/gpu/drm/i915/i915_irq.c      |   5 +-
 drivers/gpu/drm/i915/i915_reg.h      |   3 +-
 drivers/gpu/drm/i915/intel_display.c | 108 +++++++++++++++++++++++++++++------
 drivers/gpu/drm/i915/intel_drv.h     |   3 +-
 drivers/gpu/drm/i915/intel_uncore.c  |  63 ++++++++++----------
 5 files changed, 129 insertions(+), 53 deletions(-)

-- 
2.0.4