drm/i915/bdw: implement semaphore wait

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Semaphore waits use a new instruction, MI_SEMAPHORE_WAIT. The seqno to
wait on is all well defined by the table in the previous patch. There is
nothing else different from previous GEN's semaphore synchronization
code.

v2: Update macros to not require the other ring's ring->id (Chris)

v3: Add missing VCS2 gen8_ring_wait init besides
    s/ring_buffer/engine_cs (Rodrigo)

Reviewed-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>
Signed-off-by: Rodrigo Vivi <rodrigo.vivi@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

...

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Ben Widawsky 2014-06-30 09:53:38 -07:00 • committed by Daniel Vetter

parent 3e78998a58

commit 5ee426ca13

2 changed files with 33 additions and 5 deletions

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3

drivers/gpu/drm/i915/i915_reg.h

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35

drivers/gpu/drm/i915/intel_ringbuffer.c

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