drm/amdgpu: use register distance member instead of hardcode in UVD7/VCE4

This patch updates to use register distance member instead of hardcode
in UVD7/VCE4. They are for the same ASIC.
Signed-off-by: Huang Rui <ray.huang@amd.com>
Tested-by: AnZhong Huang <anzhong.huang@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/uvd_v7_0.c

@@ -1375,7 +1375,7 @@ static void uvd_v7_0_ring_emit_vm_flush(struct amdgpu_ring *ring,
 	pd_addr = amdgpu_gmc_emit_flush_gpu_tlb(ring, vmid, pd_addr);
 
 	/* wait for reg writes */
-	data0 = hub->ctx0_ptb_addr_lo32 + vmid * 2;
+	data0 = hub->ctx0_ptb_addr_lo32 + vmid * hub->ctx_addr_distance;
 	data1 = lower_32_bits(pd_addr);
 	mask = 0xffffffff;
 	uvd_v7_0_ring_emit_reg_wait(ring, data0, data1, mask);
@@ -1417,7 +1417,8 @@ static void uvd_v7_0_enc_ring_emit_vm_flush(struct amdgpu_ring *ring,
 	pd_addr = amdgpu_gmc_emit_flush_gpu_tlb(ring, vmid, pd_addr);
 
 	/* wait for reg writes */
-	uvd_v7_0_enc_ring_emit_reg_wait(ring, hub->ctx0_ptb_addr_lo32 + vmid * 2,
+	uvd_v7_0_enc_ring_emit_reg_wait(ring, hub->ctx0_ptb_addr_lo32 +
+					vmid * hub->ctx_addr_distance,
 					lower_32_bits(pd_addr), 0xffffffff);
 }
 

drivers/gpu/drm/amd/amdgpu/vce_v4_0.c

@@ -991,7 +991,8 @@ static void vce_v4_0_emit_vm_flush(struct amdgpu_ring *ring,
 	pd_addr = amdgpu_gmc_emit_flush_gpu_tlb(ring, vmid, pd_addr);
 
 	/* wait for reg writes */
-	vce_v4_0_emit_reg_wait(ring, hub->ctx0_ptb_addr_lo32 + vmid * 2,
+	vce_v4_0_emit_reg_wait(ring, hub->ctx0_ptb_addr_lo32 +
+			       vmid * hub->ctx_addr_distance,
 			       lower_32_bits(pd_addr), 0xffffffff);
 }