[PATCH 3/7] drm/amdgpu: add begin/end_use ring callbacks

[Christian König]

From: Christian König <christian.koe...@amd.com>

For manual UVD/VCE power and clock gating.

Signed-off-by: Christian König <christian.koe...@amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu.h      |  3 +++
 drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c | 10 ++++++++++
 2 files changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h 
b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 0bc84c3..a086547 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -314,6 +314,9 @@ 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);
 };
 
 /*
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 @@ 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);
 }
 
 /**
-- 
2.5.0

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