2 files changed, 13 insertions, 0 deletions

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu.h b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
index 30124f4916d2..51c4924b60b7 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu.h
@@ -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);
 };
 
 /*
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_ring.c
index f305f6309e8e..85aeb0a804bb 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);
 }
 
 /**