Display:

• MEM_BG_SYNC : 2-layer-fb-bg
• MEM_FG_SYNC : 2-layer-fb-fg
• MEM_DC_SYNC : 1-layer-fb

Set:

• MEM_BG_SYNC --> 1-layer-fb
• MEM_DC_SYNC --> 2-layer-fb-bg

也就是說..從

• 2-layer-fg-bg --> 1-layer-fb
• 1-layer-fb --> 2-layer-fb-bg

其實kernel fb0. fb1 driver 的設計是 swap，
所以把 1-layer-fb 寫入 fb0/fsl_disp_property,
fb1/fsl_disp_property 就會是 2-layer-fb-bg

把 l-layer-fb 寫入 fb1/fsl_disp_property
fb0/fsl_disp_property 就會是 2-layer-fb-bg

kernel/driver/video/mxc/mxc_ipuv3_fb.c
-- swap_disp_chan()

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2V1U Mode
fb0 : 2-layer-fb-bg

改 1-layer-fb 後，..
UI 兩邊 OK, VIDEO 只有顯示在 TVOUT (OK)