SN65DSI86EVM: Getting the EVM to work with a embedded display, no picture

Part Number: SN65DSI86EVM
Other Parts Discussed in Thread: SN65DSI86, DSI-TUNER, SN65DSI84-Q1

Hello everybody,

i have a question about the SN65DSI86, in particular the SN65DSI86-EVM. 

We are using a display with the PS8625 DisplayPort to LVDS converter and need to adapt the display to a MIPI-DSI-MCU from NXP. The display is working fine if i connect it directly to a computer running either linux or windows.I am using the SN65DSI86-EVM and want to test out the testpattern first before we connect it to the MCU-Eval-Board and start writing code. But i am not able to get it to work.

The edid data programmed in the display I2C-EEPROM looks like that:

I got the edid file from the display-supplier and opened it with a edid editor.

My settings for the DSI-Tuner are the following:

We have only two DisplayPort datalines and the AUX-lines i tried different combinations of polarity and even bits per pixel although it should be 18 (6bits per color). I am not sure about the SSC-Part i also tried enabling and disabling but nothing worked. It is not connected with the MCU-Board and the MIPI-Lines are just unconnected therefore i want to try the testpattern. For that i set the 0x3C Register to 0x10. The backlight is controlled by the LVDS-Converter on the display, so no need in the first place. My setup is the display that uses a special connector therefore i adapt it via a custom pcb to change it to Displayport and Power-In. On that board i can set the HotPlug-Pin to 3V3 or GND, which works fine with a computer.

After plugging everything in and supplying the Display with power i turn on the EVM, reset it, search for the converter via a i2c sniffer and write the configuration to the chip but nothing works. Here are my generated settings. The clock is generated by the crystal on the EVM.

Any ideas?

Thank you very much in advance.

0x09              0x00

0x0A              0x03

0x0D              0x00

0x10              0x3e

0x11              0x00

0x12              0x4c

0x13              0x4c

0x20              0x20

0x21              0x03

0x22              0x00

0x23              0x00

0x24              0xe0

0x25              0x01

0x2C              0x06

0x2D              0x00

0x30              0x03

0x31              0x80

0x34              0x2e

0x36              0x17

0x38              0xd2

0x3A              0x16

0x3C              0x10

0x3D              0x00

0x3E              0x00

0x5B              0x01

0x93              0x25

0x94              0x20

Here is the info from the display datasheet: