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>
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 30124f4..51c4924 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -313,6 +313,9 @@
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);
};
/*
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
index f305f63..85aeb0a 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
@@ -75,6 +75,10 @@
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 @@
mb();
amdgpu_ring_set_wptr(ring);
+
+ if (ring->funcs->end_use)
+ ring->funcs->end_use(ring);
}
/**
@@ -139,6 +146,9 @@
void amdgpu_ring_undo(struct amdgpu_ring *ring)
{
ring->wptr = ring->wptr_old;
+
+ if (ring->funcs->end_use)
+ ring->funcs->end_use(ring);
}
/**