drm/i915: Semaphore MBOX update generalization

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This replaces the existing MBOX update code with a more generalized
calculation for emitting mbox updates. We also create a sentinel for
doing the updates so we can more abstractly deal with the rings.

When doing MBOX updates the code must be aware of the /other/ rings.
Until now the platforms which supported semaphores had a fixed number of
rings and so it made sense for the code to be very specialized
(hardcoded).

The patch does contain a functional change, but should have no
behavioral changes.

Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Reviewed-by: Damien Lespiau <damien.lespiau@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

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Ben Widawsky 2013-05-28 19:22:18 -07:00 • committed by Daniel Vetter

parent 5586181fce

commit ad776f8b09

3 changed files with 34 additions and 15 deletions

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1

drivers/gpu/drm/i915/i915_reg.h

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43

drivers/gpu/drm/i915/intel_ringbuffer.c

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5

drivers/gpu/drm/i915/intel_ringbuffer.h

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