Author Topic: Working with cheap China HDMI display  (Read 337 times)

Offline mechand

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Working with cheap China HDMI display
« on: September 24, 2018, 11:45:04 am »
Dear colleagues!

Please, help with your HDMI experience.

I have a project with a plenty of small linux boards which must be connected to the cheap displays. I’d like to use these:

https://ru.aliexpress.com/item/Podofo-7-inch-LCD-Car-Monitor-Rearview-Screen-HDMI-VGA-DVD-Digital-Display-HD-Resolution-for/32788985703.html?spm=a2g0s.9042311.0.0.366833edyaa86f&aff_platform=aaf&cpt=1528348687239&aff_trace_key=e4fc4b8e1a624052ba5b93eac03716c5-1528348687239-01705-VnYZvQVf&terminal_id=6f98e3562e4f453c8baccee27367e3ab&dp=43b77dae0a3ae29c39e51463c1ea5190&af=139947&cv=47843&afref=http%3A%2F%2F4pda.ru%2Fforum%2Findex.php%3Fshowtopic%3D750921%26st%3D5240&mall_affr=pr3&aff_platform=aaf&cpt=1528365410096&sk=VnYZvQVf&aff_trace_key=84a6e5076bfc45e6a7fe76045d06fbb0-1528365410096-08679-VnYZvQVf&terminal_id=6f98e3562e4f453c8baccee27367e3ab

This display works via HDMI with Raspberry but refuse to works with Orange Pi PC plus.  As I can understand it is same issue described there

https://www.cnx-software.com/2017/09/15/7-lcd-display-with-hdmi-input-audio-output-launched-for-orange-pi-boards/#comment-546014

My only need from linux board : eMMC (or NAND) memory (SD card is not reliable) and cooperation with such displays. Raspberry can work but does not have eMMC chip.

What do u think , can I use one of Cubieboards in my application? Does it have same HDMI interface with Orange Pi or completely another?
 
Thanks!

Offline rgmhtt

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Re: Working with cheap China HDMI display
« Reply #1 on: September 26, 2018, 09:11:47 am »
Go to http://linux-sunxi.org and look up the various boards, and their uboot support state.  This will tell you which processor, graphic engine and the like for each product supported by sunxi uboot.

I have an old, rather cheap AOC monitor with VGA/DMI.  I use a DMI/HDMI connector and it works fine with my Cubieboard2 and Cubietruck HDMI.  Note that the Cubietruck VGA only kind of works.  This is a known limitation of its uboot.

I use Fedora and Centos as my distros.  I am a tester of both.