Add support for custom virtual screen resolution and support for the official Raspberry Pi touchscreen.

Hi i need support for a 800x480 resolution on the official Raspberry Pi touchscreen while 640x480 works, its too small of a res. I also recommend having a custom resolution support because config.txt is ignored on the touchscreen and I can't find any option to change the res on the touchscreen anywhere, I just see HDMI options and this isn't HDMI. Thanks!

There is already a Native Resolution option in the UEFI and this should already be picking up on changes to config.txt, providing that you don't have a virtual resolution also checked and your custom timings are added to the text file.

This Instructables article is for setting up that screen (despite the name of the link): https://www.instructables.com/Setting-Up-an-800X400-5inch-HDMI-LCD-for-Raspberry/ These are their timings:

hdmi_group=2
#hdmi_mode=1
hdmi_mode=87
hdmi_cvt=800 480 60 6 0 0 0

The extra 3 zero's are not usually required.

Also, if you don't mind testing experimental drivers, I have work-in-progress support for dual-display for UEFI and Windows. Please take sensible precautions before trying experimental drivers as it can yield some unexpected results. Modded Driver: pi4bdd-800x480-WIP.zip 1080p Source: https://github.com/TheMindVirus/pi4bdd

Hi there It still defaults to 800x600 possibly because it’s not an hdmi device . I also took a look at the modded driver and it blacks out the screen and the I plug in a hdmi tv in and it seems like it shows as second so I’m not sure.

Oh nice, glad to hear it's working as originally intended.

I've only told it to find display number 2 out of a possible 5, I think it just happens to be HDMI0 and HDMI1.

The other 3 outputs (composite, DPI and DSI) are similarly connected to PixelValves but I'm not sure if they are counted along with HDMI displays in the Mailbox Property Interface.

I don't have any non-HDMI screens I can test with as such...