SN65DSI83: Blank screen of death

That's bad. I hoped that I had misconfigured something.

But If everything looks okay why the test pattern is not working?

Yes I am following the initialization sequence. I managed to get out of the black screen but now there is another problem.

Colors are not too vibrant like demo image. It looks like there is a white vertical line after every pixel.

Hi Apostolos,

Sorry for the delay. Are you still having issues with the display? Can you read register 0XE5 and see if any error bits are being set (clear this register by writing 0xFF to it before reading it).

Also, can you let me know how you fixed the previous issue? Perhaps it has something to do with the current issue. 

Regards,
I.K.

You are right. Those values make no difference when I change them from DSI Tuner.

My initial setting on 0x18 was 7a so I tried the following values according to the datasheet.

• 3a
• 5a
• 9a
• ba
• da
• fa

Some gave the same result and some didn't work at all? Is there something I could try to change?

1. I first write and then I crosscheck by reading the values:

2. Using an actual DSI input stream requires modification to the input clock as you can see on the previous picture. Doing so results to 0x01 in register 0x5e.

3. I sent you an email

The issue was not related to the converter. We checked voltages again and we found out that vcom wasn't correct. After fixing vcom the test pattern was correct and we also managed to use a real dsi source.