使用SN65DSI85 MIPI TO LVDS bridge，在调试过程中，现在情况是test pattern可以显示，但是正常模式是黑屏，没有图像输出
单路MIPI 转双路LVDS
Size 10.25 inch
Resolution 1920(RGB) x 720
Interface 2-ports LVDS 24 bits VESA
从dump出来的寄存器列表看，0xe5 = 1 , sn65dsi85 pll locked failed
已经按照datasheet上的Initialization Sequence 进行init ，附件是CSR 寄存器列表
Init seq 1 After power is applied and stable, all DSI Input lanes including DSI CLK(DA x P/N, DB x P/N) MUST be driven to LP11 state.
Init seq 2 Assert the EN pin
Init seq 3 Wait for 1ms for the internal voltage regulator to stabilize
Init seq 4 Initialize all CSR registers to their appropriate values based on the implementation (The SN65DSI85 is not functional until the CSR registers are initialized)
Init seq 5 Start the DSI video stream
Init seq 6 Set the PLL_EN bit (CSR 0x0D.0)
Init seq 7 Wait for a minimum of 3 ms.
Init seq 8 Set the SOFT_RESET bit (CSR 0x09.0)
