Support Radxa Zero about penkesu

[hipboi]

@penk We can just ship one free sample to you. Please send me your shipping address.

[RadxaYuntian]

So the preliminary investigation shows this is likely a driver issue. The resolution for the screen is actually 400x1280 as that's the default display orientation. In meson driver, there are predefined resolutions and custom resolutions. Any custom resolutions with horizontal resolution less than 640, or vertical resolution greater than 1200 is rejected by the driver.

We might be able to add a custom resolution in the predefined list. Will need more investigation to solve this issue.

[RicInNewMexico]

@penk We can just ship one free sample to you. Please send me your shipping address.

Now that's community support! I was just going to comment and list which distributors carry the Radxa Zero.. just ordered a 4GB ram / 32GB eMMC for my penkesu build last night

[2disbetter]

@markcordova unfortunately a radxa Zero was not available. Instead of leaving the issue open and hanging, it is just closed until one can be attained. I personally think a Radxa would be excellent in there. I'm a little worried about clearances, but it should be fine.

[2disbetter]

Thanks Drizzt, I was able to get one too. I'm tinkering with it now. Just trying to get the waveshare display to work. I really want to check the power requirements and see how the thermals are. Will post again when I have something to report.

[RadxaYuntian]

The driver limitation was lifted so display should work now. The touch screen IIRC is USB based? In that case it should work as well.

[penk]

That looks cool, do you know how do I get one?

[Drizzt321]

That's interesting. The buy page shows Seeed. Don't see it there though, strangely. Does seem to be on ALLNET China though, and also includes options for up to 128GB eMMC which seems quite interesting. Not all that pricey for that, although not sure on shipping.

Still supports mSD cards, and USB-C instead of micro-B for power & data, and micro HDMI connector vs mini HDMI on the RPi Zero 2W. So still pretty standard, but probably needing slightly different cables/adapters. I haven't looked close, but the 40-pin header I bet is compatible.

[cristicbz]

@hipboi I tried to get this to work for a couple of evenings, but wasn't able to get the screen to work. Tried a custom modeline, kernel params, but no luck. Seems like the modesetting driver doesn't support the odd resolution (400x1280)?

Someone else also struggled by looks of it: https://forum.radxa.com/t/waveshare-7-9in-touchscreen-support/7555

I'm by no means an expert, so I'm sure someone else could make it work. Might need a kernel patch

[hipboi]

@cristicbz somehow I missed this thread, @RadxaYuntian will follow up this issue. I believe we need some custom edid for this panel.

[markcordova]

@hipboi this issue is now closed, does this mean that the radxa zero is tested to be working fine in this setup? thanks

[Drizzt321]

@2disbetter I got my hands on a Radxa Zero, haven't done anything yet. I can lend it to you to do the testing you need, and then send it back.

[kariudo]

Thanks Drizzt, I was able to get one too. I'm tinkering with it now. Just trying to get the waveshare display to work. I really want to check the power requirements and see how the thermals are. Will post again when I have something to report.

Should probably re-open the issue, if its in progress. I'd be interested in this too, especially with hardware shortages for things like zero w 2.

[2disbetter]

right now the display not working is the main issue. Still working on it, but would be very happy if we could get a comment from hipboi about the driver and the waveshare screen used with the Penkesu.

[jcbergerson]

I also am curious about the radxa Zero/Zero 2 @hipboi for the penkesu platform. The video driver and support of the waveshare screen would be awesome! The future collaboration of the open @penk pocketPC and the possibilities of the Radxa Zero platform as it’s heartbeat would be cutting edge magic!

[2disbetter]

We might be able to add a custom resolution in the predefined list. Will need more investigation to solve this issue.

Any luck on this? I have since been able to source a battery charger that can output 5v at a max of 3A. I would really love to try the Radxa with a USB hub and see if I can get the display and the touchscreen working. It would be one significant upgrade to the Penkesu.

[2disbetter]

Thank you, we will work on adding this to the build. This would represent a significant bump in performance.

[markcordova]

@2disbetter I can confirm that the display now works with the Radxa Zero, and with a USB hub the touchscreen works as well.

I did have to build and install a new kernel as the pre-built Linux images don't work with the display out of the box. Alternatively, you can build Kali Linux for the Radxa Zero and it already supports the display although there are some minor issues like intermittent screen tearing.