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Troubleshooting • Re: CM5 trouble with 7inch display on DSI

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Just to make sure: you're using a V2 toucscreen https://www.raspberrypi.com/products/touch-display-2/ because of the overlay used in your config.txt? Make sure your old Pis run decent firmware/latest OS or the V2 DSI screen will do plain nothing when connected to old devices!

On a Compute module platform camera_auto_detect and display_auto_detect have no effect, so simply remove them.

Which interface is your display connected to; DSI0 or DSI1?
'dtoverlay=vc4-kms-dsi-ili9881-7inch' assumes the display is connected to DSI-1

'dtoverlay=vc4-kms-dsi-ili9881-7inch,dsi0' in case of having it connected to DSI-0.

O.k: that's what it was on CM4IO! On CM5IO there is either another error on the silkscreen printing or in the documentation as there is some inconsistency to which interface J6 is related to (it was affecting DSI00 on CM4IO):
j6.jpg
cm5io_csi.jpg
schematic.jpg
Because of that one needs to use:
When using J5: dtoverlay=vc4-kms-dsi-ili9881-7inch,dsi0

When using J16 + having J6 mounted: dtoverlay=vc4-kms-dsi-ili9881-7inch

well ... what to say ... maybe 'it's an evaluation platform' ?

Statistics: Posted by aBUGSworstnightmare — Thu Dec 12, 2024 1:50 pm



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