drm/amdgpu/vcn: Share vcn_v2_0_dec_ring_test_ring to vcn2.5

Share vcn_v2_0_dec_ring_test_ring to vcn2.5 to support
vcn software ring.
Signed-off-by: James Zhu <James.Zhu@amd.com>
Reviewed-by: Leo Liu <leo.liu@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/vcn_v2_0.c

@@ -1624,7 +1624,7 @@ static int vcn_v2_0_process_interrupt(struct amdgpu_device *adev,
 	return 0;
 }
 
-static int vcn_v2_0_dec_ring_test_ring(struct amdgpu_ring *ring)
+int vcn_v2_0_dec_ring_test_ring(struct amdgpu_ring *ring)
 {
 	struct amdgpu_device *adev = ring->adev;
 	uint32_t tmp = 0;

drivers/gpu/drm/amd/amdgpu/vcn_v2_0.h

@@ -37,6 +37,7 @@ extern void vcn_v2_0_dec_ring_emit_vm_flush(struct amdgpu_ring *ring,
 				unsigned vmid, uint64_t pd_addr);
 extern void vcn_v2_0_dec_ring_emit_wreg(struct amdgpu_ring *ring,
 				uint32_t reg, uint32_t val);
+extern int vcn_v2_0_dec_ring_test_ring(struct amdgpu_ring *ring);
 
 extern void vcn_v2_0_enc_ring_insert_end(struct amdgpu_ring *ring);
 extern void vcn_v2_0_enc_ring_emit_fence(struct amdgpu_ring *ring, u64 addr,

drivers/gpu/drm/amd/amdgpu/vcn_v2_5.c

@@ -1488,7 +1488,7 @@ static const struct amdgpu_ring_funcs vcn_v2_5_dec_ring_vm_funcs = {
 	.emit_ib = vcn_v2_0_dec_ring_emit_ib,
 	.emit_fence = vcn_v2_0_dec_ring_emit_fence,
 	.emit_vm_flush = vcn_v2_0_dec_ring_emit_vm_flush,
-	.test_ring = amdgpu_vcn_dec_ring_test_ring,
+	.test_ring = vcn_v2_0_dec_ring_test_ring,
 	.test_ib = amdgpu_vcn_dec_ring_test_ib,
 	.insert_nop = vcn_v2_0_dec_ring_insert_nop,
 	.insert_start = vcn_v2_0_dec_ring_insert_start,