drm/i915/tgl: Disable preemption while being debugged

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We see failures where the context continues executing past a
preemption event, eventually leading to situations where a request has
executed before we have event submitted it to HW! It seems like tgl is
ignoring our RING_TAIL updates, but more likely is that there is a
missing update required for our semaphore waits around preemption.

v2: And disable internal semaphore usage

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Acked-by: Mika Kuoppala <mika.kuoppala@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190912132313.12751-1-chris@chris-wilson.co.uk

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Chris Wilson 2019-09-12 14:23:13 +01:00

parent 16ffe73c18

commit ee73e2795b

2 changed files with 4 additions and 0 deletions

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3

drivers/gpu/drm/i915/gt/intel_lrc.c

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1

drivers/gpu/drm/i915/i915_pci.c

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