recalbox not work well with DPI LCD on 4B

[ian57]

@DRAgon734235 no not yep... even with new 5.10 kernels

did you see this https://www.waveshare.com/wiki/2.8inch_DPI_LCD there are specific overlays for this screen https://www.waveshare.com/wiki/File:28DPIB_DTBO.zip

I think you should copy them in the /boot/overlays directory and use the config from the wiki :

gpio=0-9=a2
gpio=12-17=a2
gpio=20-25=a2
dtoverlay=dpi24
enable_dpi_lcd=1
display_default_lcd=1
extra_transpose_buffer=2
dpi_group=2
dpi_mode=87
dpi_output_format=0x7F216
hdmi_timings=480 0 26 16 10 640 0 25 10 15 0 0 0 60 0 32000000 1
#dtoverlay=waveshare-28dpi-3b-4b
#dtoverlay=waveshare-28dpi-3b
dtoverlay=waveshare-28dpi-4b

[DRAgon734235]

@ian57

yes ， I use that dtbo file from waveshare

I have tried that code ， same

The LCD can display OK ， but recalbox os can not enter Emulator

I think this is recalbox bug at DPI LCD，

[ian57]

@DRAgon734235 in the code you post, you use dpi18 and not dpi24 which is the right one

which one are you using?

[DRAgon734235]

@ian57

I have tried dpi18 and dpi24

they are same result

[ian57]

@DRAgon734235 quite strange... works well here...
perhaps it comes from the 7.2 beta ... so wait and see

[DRAgon734235]

@ian57
it is possible to rotate the DPI or HDMI LCD with 90 or 270 at recalbox 4B？

[ian57]

@DRAgon734235 actually with recalbox, no, sorry

[DRAgon734235]

@ian57

[ian57]

@DRAgon734235 Yes I know !

[lulumix]

BONJOUR,

je pense avoir trouvais d ou veins mon problème
je passe par (controllers gpio.enablec =0)
je remplace le numéro 0 par1 ou 1.2 enregitrement
je place la carte sd dans le rasb 3b+il se passe rien les boutons de ma bartop ne son pas reconnu je retire ma carte sd que je la remets dans l ordi (controllers gpio.enblec=0) il reste toujours sur 0 méme aprés un enregistrement
je sais pas pourquoi il rest sur 0.

merci de pouvoir me répondre car j arrive pas

[Zing]

@lulumix Please don't do SPAM:

• https://forum.recalbox.com/topic/23465/controleur-gpio?_=1613931565428
• https://forum.recalbox.com/topic/23398/problème-gpio-recalbox-7-1-1?_=1613847836893

[proplayer2020]

Hello, i seen this post is quite old, but i have the same issue, even in recalbox latest version (8.11 or something).
But on recalbox latest version, i can rotate to 270 ad 90°,
but the screen stays on the logo screen like DRAgon734235's screen.
I think my screen is SPI but im unsure because im new to screen modes and all (but work like that with SPI and not works with DPI).

I looked all the tutorials to connect TFT screen to rpi4 and yet doesnt works and stays the same loading screen.

Sorry for bad english.

[proplayer2020]

Same issue on pi3... please help
or should I start new topic?

[proplayer2020]

I also think that the rpi doesn't detect the screen and just boot's up when i plug a TV hdmi.

[Scavy]

@proplayer2020 hello
is your recalbox starts when connected to a hdmi tv ?

[Nanaki]

@proplayer2020 Hi, can you please provide information about your screen ? Brand, model, etc

Thank you

[proplayer2020]

sorry for late response, yes my recalbox works on tv screen.

[proplayer2020]

@Nanaki Its an adafruit 3,5" touch screen that connect directly to the rpi via spi bus

[Magaki]

@proplayer2020

Hello, did you follow this link on Recalbox Wiki ?
https://wiki.recalbox.com/en/tutorials/video/tft/tft-lcd-on-spi-bus

[proplayer2020]

@Magaki Yes its the tutorial i followed.I followed the 2,8 inch screen part and I replaced dtoverlay by the same driver but in place of 28 i put 35