MIPI DSI over 1-2 meter distance - Page 1
Forum section: electronics / projects

author: ricko_uk
author_rank: Super Contributor
timestamp: September 20, 2024, 01:51:13 pm
content: Hi,in the board I am designing I am driving this display which has a MIPI DSI interface:https://www.panelook.com/upload/product/243585/202403251897.pdfAfter doing a bit of research it looks like MIPI DSI can only run reliably over a maximum distance of around 30cm or so. But because of mechanical constraints, the PCB might need to be placed at around 1 to 2 meters away.Because the display will display video, I assume the software will configure the clock to run at its maximum speed.What is the best solution to transmit that signal over that 1 to 2 meters distance?Thank you

author: DavidAlfa
author_rank: Super Contributor
timestamp: September 20, 2024, 02:01:22 pm
content: ADV7533 MIPI-HDMI bridge? Then whatever converts it back to MIPI.

author: Postal2
author_rank: Frequent Contributor
timestamp: September 20, 2024, 02:43:37 pm
content: Quote from: ricko_uk on September 20, 2024, 01:51:13 pmNo solution. In my case clock 200 MHz, I tried to connect display to Orange-IOT, no one helped (no any advice at all). To use dsi-hdmi you need change driver in firmware.

author: jas_G
author_rank: Newbie
timestamp: October 02, 2024, 12:02:13 am
content: Hi, did you have any luck with this? I am looking into a similar problem - there doesn't seem to be two manyHDMI-MIPI/DP-MIPI/LVDS-MIPI ICs. Looks like mostly FPGA solutions or RGB/MIPI conversions...

author: Postal2
author_rank: Frequent Contributor
timestamp: October 02, 2024, 04:20:54 am
content: There is a solution. You can use a viewing tube with a camera on one end and a display on the other, and adjust the camera to the display that needs to be extended.You can also use a neatly cut bundle of fibres from the optical internet as a light guide, or a ready-made light guide of this type.Or any type of optical transmission with lenses and mirrors. Similar to a LCD projector.

author: ricko_uk
author_rank: Super Contributor
timestamp: October 03, 2024, 12:53:02 am
content: Thank you all.@jas_G,we are now looking into modifying the mechanics to keep the PCB next to the display (for a number of other reasons). But the options suggested above, unless you have very large displays running at very high clocks, they should work.

author: dmendesf
author_rank: Frequent Contributor
timestamp: October 03, 2024, 02:25:32 am
content: What about a DSI redriver?https://www.diodes.com/part/view/PI2MEQX2505

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 03, 2024, 02:57:25 am
content: I think about it too.https://www.ti.com/product/SN65DPHY440SShttps://www.ti.com/product/SN75DPHY440SS

author: Postal2
author_rank: Frequent Contributor
timestamp: October 03, 2024, 06:44:55 am
content: There is no talk of 2 meters (redriver):

author: squadchannel
author_rank: Frequent Contributor
timestamp: October 03, 2024, 08:58:39 am
content: I think most retimers assume it's not a long distance, about the distance between a laptop webcam and the motherboard. the TI datasheet has a picture.I don't think 2m is possible.Well, he says he will change the design so it will be solved.

author: ricko_uk
author_rank: Super Contributor
timestamp: October 04, 2024, 03:22:29 pm
content: Thank you all for the feedback.And also very interesting additional infos in your latest replies.

author: alexk195
author_rank: Newbie
timestamp: October 05, 2024, 01:09:58 pm
content: Have you looked at FPD link from Ti or GMSL from Analog devices?

author: ricko_uk
author_rank: Super Contributor
timestamp: October 05, 2024, 09:36:16 pm
content: Thank you @alexk195,those are also interesting solutions.Good to know for future projects.