SN65DSI83: sn65dsi83:single to single

sijie

Part Number: SN65DSI83

Hi everyone,

Use SN65DSI83 to achieve single-channel DSI to single-channel LVDS。Mipi signal is normal, but LVDS signal cannot be measured after entering the chip。

Can you give me some help?

Best Regards,

over 4 years ago

0 David (ASIC) Liu over 4 years ago

TI__Guru**** 177396 points

Hi,

Can you please provide schematic and DSI83 register dump?

Does test pattern work in this particular case?

For further debugging, please refer to this e2e FAQ, https://e2e.ti.com/support/interface-group/interface/f/interface-forum/852871/faq-sn65dsi84-no-display-output-with-sn65dsi83-sn65dsi84-sn65dsi85.

Thanks

David

0 sijie over 4 years ago in reply to David (ASIC) Liu

Prodigy 240 points

Hi,

The schematic and DSI83 register dump are as follows:

Currently the test mode is not working。

Best Regard,

0 David (ASIC) Liu over 4 years ago in reply to sijie

TI__Guru**** 177396 points

Hi,

Are you using the DSI tuner to generate the DSI83 registers programming value? Comparing between the dump value and the panel datasheet, it looks like the dump value does not match with the value in the panel datasheet.

Please see this link on using the DSI tuner to program the register value, https://www.youtube.com/watch?v=w3fY_Mf2YiA.

Thanks

David

0 sijie over 4 years ago in reply to David (ASIC) Liu

Prodigy 240 points

Hi,

I have used the DSI tuner to program the register value。

Could you please help to check if there is any problem？

Best Regards,

0 David (ASIC) Liu over 4 years ago in reply to sijie

TI__Guru**** 177396 points

Hi,

I don't see an issue with your DSI programming. One thing I don't understand is the Htotal does not equal to Hsync_pulse_width + Hfront_porch + Hback_porch + Hactive in the panel datasheet.

Can you please enable the test pattern and also follow the initialization procedure in section 7.4.2 to see if you can get the test pattern?

Thanks

David