SN65DSI86：Training success, but not video show

What causes this and how to recover?

Before enabling Video streaming reg, can I start dsi video streaming?

I am trying to support the hpd feature, not showing video is a probabilistic issue, DSI video stream is always there

Hey Li,

Have you been using the DSI86 calculator to set the register values? 

If not the calculator can be found in the following E2E link:  https://e2e.ti.com/support/interface-group/interface/f/interface-forum/945404/faq-sn65dsi86-how-do-i-programming-the-sn65dsi86-registers

Also it is important to follow the proper power up and power down sequence exactly. The power up and power down sequence can be found in the SN65DSI86 datasheet at section 8.4.2 and 8.4.3 respectively. 

I read back the regs and all the regs are consistent with excel.

Is it a timing problem? Do I have to open the DSI video stream after the dsi timing regs is set? Because I can't control the opening and closing of DSI host now, the DSI video stream is always open.
Disable VSTREAM_ENABLE,LINK MODE,DP PLL when a remove event is received.
When the insert and replug events are received, the power on sequence is re-executed, except for the enable pin.
The problem is that there is a chance that 0xf6 is abnormal, and then the screen is not on.

There is a very important question that needs to be understood, when will F6-related testing be started? It seems to accompany every training success?