drm/i915/hsw: Fix GPU hang during resume from S3-devices state

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Currently resuming on HSW from S3 pm_test/devices state leads to an
unrecoverable GPU hang. Resetting the GPU during suspend fixes this. For
a full S3 cycle this change only means the reset happens earlier (before
reaching S3). For S4 the reset will happen now both during the freeze
and quiesce phases, which is a benefit since it will guarantee that the
GPU is idle before creating and loading the hibernation image.

Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Cc: Chris Wilson <chris@chris-wilson.co.uk>
Suggested-by: Chris Wilson <chris@chris-wilson.co.uk>
Signed-off-by: Imre Deak <imre.deak@intel.com>
Reviewed-by: Chris Wilson <chris@chris-wilson.co.uk>
Link: http://patchwork.freedesktop.org/patch/msgid/1476283597-580-1-git-send-email-imre.deak@intel.com

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This commit is contained in:

Imre Deak 2016-10-12 17:46:37 +03:00

parent 45353ce59b

commit 1c777c5d1d

2 changed files with 26 additions and 26 deletions

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28

drivers/gpu/drm/i915/i915_drv.c

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24

drivers/gpu/drm/i915/i915_gem.c

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