drm/i915: Apply strongly ordered RCS breadcrumb to gen8/legacy

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For legacy ringbuffer mode, we need the new ordered breadcrumb emission
tried and tested on execlists in order to avoid the dreaded "missed
interrupt" syndrome. A secondary advantage of the execlists method is
that it writes to an arbitrary address, useful if one wants to write a
breadcrumb elsewhere.

This fix is taken from commit 7c17d37737 (drm/i915: Use ordered seqno
write interrupt generation on gen8+ execlists).

Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Cc: Mika Kuoppala <mika.kuoppala@intel.com>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: http://patchwork.freedesktop.org/patch/msgid/1461932305-14637-1-git-send-email-chris@chris-wilson.co.uk

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This commit is contained in:

Chris Wilson 2016-04-29 13:18:21 +01:00

parent 0e93cdd4a9

commit a58c01aa6e

3 changed files with 38 additions and 9 deletions

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10

drivers/gpu/drm/i915/intel_lrc.c

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32

drivers/gpu/drm/i915/intel_ringbuffer.c

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5

drivers/gpu/drm/i915/intel_ringbuffer.h

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