请问一下，芒果tina t113 fb0有双缓冲吗？如果没有要怎么开启呢？
cat /sys/class/disp/disp/attr/sys
screen 0:
de_rate 300000000 hz, ref_fps:60
mgr0: 480x320 fmt[rgb] cs[0x204] range[full] eotf[0x4] bits[8bits] err[0] force_sync[0] unblank direct_show[false] iommu[1]
dmabuf: cache[0] cache max[0] umap skip[0] umap skip max[16]
lcd output backlight( 0) fps:72.9 480x 320
err:0 skip:71 irq:1652 vsync:0 vsync_skip:0
BUF enable ch[1] lyr[0] z[16] prem[N] a[pixel 255] fmt[ 10] fb[ 480, 320; 480, 320; 480, 320] crop[ 0, 0, 480, 320] frame[ 0, 0, 480, 320] addr[ 0, 0, 0] flags[0x 0] trd[0,0] depth[ 0]
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