drm/amdgpu/gfx9: add emit_reg_write_reg_wait ring callback (v2)

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This adds support for writing and reading back in a single
oneshot packet.  This is needed to send a tlb invalidation
and wait for ack in a single operation.

v2: squash the gfx ring stall fix

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>
Signed-off-by: Emily Deng <Emily.Deng@amd.com>

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Alex Deucher 2018-03-27 15:07:50 -05:00

parent 828536385a

commit 10ed3c3190

1 changed files with 12 additions and 0 deletions

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drivers/gpu/drm/amd/amdgpu/gfx_v9_0.c

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