drm/i915: Show stack (by WARN) for hitting forcewake errors

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On Sandybridge, we need a workaround to wait for the CPU thread to wake
up before we are sure that we have enabled the GT power well. However,
we do see the errors being reported and failed reads returning spurious
results. To try and capture more details as it fails, promote the error
into a WARN so we grab the stacktrace, and to try and reduce the
frequency of error increase the timeout from 500us to 5ms.

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Tvrtko Ursulin <tvrtko.ursulin@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180720111102.11549-1-chris@chris-wilson.co.uk

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Chris Wilson 2018-07-20 12:11:02 +01:00

parent 6a2f59e45a

commit a5b22b5ed8

1 changed files with 14 additions and 4 deletions

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drivers/gpu/drm/i915/intel_uncore.c

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