drm/i915/ringbuffer: Use the HEAD auto-reporting mechanism

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My Sandybridge only reports 0 for the ring buffer registers, causing it
to hang as soon as we exhaust the available ring. As a workaround, take
advantage of our huge ring buffers and use the auto-reporting mechanism
to update the status page with the HEAD location every 64 KiB.

Cherry-picked from 6aa56062ea.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=31404
Tested-by: Zhao Jian <jian.j.zhao@intel.com>
Cc: stable@kernel.org
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

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This commit is contained in:

Chris Wilson 2010-11-05 08:56:38 +00:00

parent b47b30ccda

commit 08deebf987

1 changed files with 12 additions and 1 deletions

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drivers/gpu/drm/i915/intel_ringbuffer.c

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