How to use vce1 in Radeon Pro WX5100

[Sunnanyong (Nanyong Sun, Intelligent Computing Solution Development Dep)]

Hi all£¬
     I found two vce block under /sys/kernel/debug/dri/1/amdgpu_ring_vce0 & amdgpu_ring_vce1.
when I use ffmpeg to do H.264 encoding , I use ¡°umr ¨Ctop¡±  and press ¡°c¡± to show the VCE loading,  and
I found that only vce0 had loading , and vce1 always be 0%, like this:
VCE Bits:
VCE0 =>     100%   |            VCE1 =>     0 %   |
  So I think vce1 block has never been used, and how to select vce1 to do encode ?
My environment:
Radeon Pro WX5100
Mesa18.0.5
Linux kernel 4.19

Please help!
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