drm/1915: ringbuffer wait for idle function

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Added a new function which waits for the ringbuffer space to be equal to
(total - 8). This is the empty condition of the ringbuffer, and
equivalent to head==tail.

Also modified two users of this functionality elsewhere in the code.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>

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Ben Widawsky 2011-03-19 18:14:27 -07:00 • committed by Keith Packard

parent 2c34b850ee

commit 96f298aa9c

3 changed files with 8 additions and 2 deletions

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2

drivers/gpu/drm/i915/i915_dma.c

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2

drivers/gpu/drm/i915/intel_ringbuffer.c

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6

drivers/gpu/drm/i915/intel_ringbuffer.h

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