xovox / RetroCRT

RetroPie on CRT! RetroTink, JAMMA, SCART & more!
GNU General Public License v3.0
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Calculate hdmi_timings for Raspberry Pi 4 #45

Closed phantom-voltage closed 2 years ago

phantom-voltage commented 3 years ago

According to a RetroRGB article the DPI has changed from previous models (source?). In my own tests, I can confirm that video output for Raspberry Pi 4 Model B using the hdmi_timings provided in RetroCRT (RetroCRT3 "Dark Odyssey" Beta (20210617)) boot/config.txt files, that the video output no longer functions properly (black screen).

The original work to get the new hdmi_timings for Lakka appears to be from this forum post. These timings for Lakka are not suitable for EmulationStation in my experience. The resolution is scaled to a large horizontal value for what I'm assuming is pixel perfect scaling, with a matching pixel frequency. If relied on for solely rgui, the interface can be scaled accordingly. EmulationStation in my experience can not scale accordingly.

I found another user also attempting to solve these problems with the Raspberry Pi 4, although using the vga666 hat.

HDMI timings for RetroTink and other hats need to be configured to support Raspberry Pi 4.

I am not sure if anyone is working on this. I'll work on this when possible, although not my area of expertise.

xovox commented 2 years ago

hi! I haven't been paying close attention to this project lately, but I just put a pi4 into my JAMMA cabinet. there are 3rd party drivers I'm going to use for everything to get it working on the pi4. I absolutely want help with everything on here.

are you in the FB group https://www.facebook.com/groups/2363533017255110 ?

xovox commented 2 years ago

https://github.com/xovox/rpi-dpidac

xovox commented 2 years ago

http://mydedibox.fr/rpi4-custom-modes-on-a-crt-tv-the-holy-grail