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drm/amdgpu: add begin/end_use ring callbacks 

For manual UVD/VCE power and clock gating.

Signed-off-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Christian König 2016-07-20 13:49:34 +02:00 committed by Alex Deucher
parent 7c23ace2db
commit f06505b8d2
2 changed files with 13 additions and 0 deletions
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3
drivers/gpu/drm/amd/amdgpu/amdgpu.h
View File

@ -313,6 +313,9 @@ struct amdgpu_ring_funcs {
void (*pad_ib)(struct amdgpu_ring *ring, struct amdgpu_ib *ib);
unsigned (*init_cond_exec)(struct amdgpu_ring *ring);
void (*patch_cond_exec)(struct amdgpu_ring *ring, unsigned offset);
/* note usage for clock and power gating */
void (*begin_use)(struct amdgpu_ring *ring);
void (*end_use)(struct amdgpu_ring *ring);
};
/*

10
drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
View File

@ -75,6 +75,10 @@ int amdgpu_ring_alloc(struct amdgpu_ring *ring, unsigned ndw)
ring->count_dw = ndw;
ring->wptr_old = ring->wptr;
if (ring->funcs->begin_use)
ring->funcs->begin_use(ring);
return 0;
}
@ -127,6 +131,9 @@ void amdgpu_ring_commit(struct amdgpu_ring *ring)
mb();
amdgpu_ring_set_wptr(ring);
if (ring->funcs->end_use)
ring->funcs->end_use(ring);
}
/**
@ -139,6 +146,9 @@ void amdgpu_ring_commit(struct amdgpu_ring *ring)
void amdgpu_ring_undo(struct amdgpu_ring *ring)
{
ring->wptr = ring->wptr_old;
if (ring->funcs->end_use)
ring->funcs->end_use(ring);
}
/**