drm/i915/ringbuffer: 2-step restart

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We may be simply restarting too fast for the culmudgeonly gen3/gen4 as
we still see missing interrupts following a reset. So let's try
restarting a little slower, first wake up the ring empty and then tell
it about the work it has to perform.

References: https://bugs.freedesktop.org/show_bug.cgi?id=108735
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Reviewed-by: Joonas Lahtinen <joonas.lahtinen@linux.intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20181126122821.4537-1-chris@chris-wilson.co.uk

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Chris Wilson 2018-11-26 12:28:21 +00:00

parent 0e39037b31

commit b7f2189927

1 changed files with 9 additions and 2 deletions

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drivers/gpu/drm/i915/intel_ringbuffer.c

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