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agherzan / meta-raspberrypi

Yocto/OE BSP layer for the Raspberry Pi boards
https://www.yoctoproject.org/
MIT License
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how set pi5 hdmi output as pixel to pixel mode? #1354

Closed gitgonewithwind closed 4 months ago

gitgonewithwind commented 4 months ago

Hi all, sorry to bother you again

I never use hdmi output as pixel to pixel mode, when our touchscreen is set to pixel to pixel mode,the hdmi output is not FULL display. It seems I need to set pi5 hdmi as pixel to pixel mode.

I just searched online , it seems I need to change dts source code? it is right? what is default output mode for hdmi? any ideas ?

I am using commit meta-raspberrypi

commit 1879cb831f4ea3e532cb5ce9fa0f32be917e8fa3 (HEAD -> master, origin/master, origin/HEAD) Author: Max Stepanov mast@imast.ru Date: Thu Mar 21 13:50:55 2024 -0400

Thank you so much.

kraj commented 4 months ago

if say display is 800x480 then add something like below to /boot/config.txt on the SD card and reboot

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

hdmi_group=2: Sets the HDMI output group to DMT (Display Monitor Timings) hdmi_mode=87: Enables a custom HDMI mode

gitgonewithwind commented 4 months ago

@kraj thank you so much. works!

gitgonewithwind commented 4 months ago

@kraj sorry, I think I have to open this issue . after I and my colleague tested. it is not useful to change config.txt. it seems config.txt not work as expection

we only change /etc/X11/xorg.conf.d/99-monitor.conf will can fix it and keep config.txt as default. Section "Monitor" Identifier "HDMI-1" Option "PreferredMode" "1920x1080" EndSection

Section "Monitor" Identifier "HDMI-2" Option "PreferredMode" "1920x1080" EndSection

my screen native resolution is 1920x1080

refs to this issue: https://github.com/agherzan/meta-raspberrypi/issues/1312
and this : https://github.com/agherzan/meta-raspberrypi/issues/1322