drm/amdgpu/gmc9: use amdgpu_ring_emit_reg_write_reg_wait in gpu tlb flush

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Use amdgpu_ring_emit_reg_write_reg_wait.  On engines that support it,
it provides a write and wait in a single packet which avoids a missed
ack if a world switch happens between the request and waiting for the
ack.

Reviewed-by: Huang Rui <ray.huang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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Alex Deucher 2018-03-27 17:10:56 -05:00

parent f58b85e3ec

commit f8bc903707

1 changed files with 3 additions and 5 deletions

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8

drivers/gpu/drm/amd/amdgpu/gmc_v9_0.c

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