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balena-labs-projects / fbcp

fbcp driver for SPI based displays for Raspberry Pis via fbcp-ili9341
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use with custom dtoverlay (rotate, speed, fps) #2

Closed klutchell closed 3 years ago

klutchell commented 3 years ago

How should I support a screen where I also have custom dtoverlay values?

RESIN_HOST_CONFIG_dtoverlay=pitft35-resistive,rotate=90,speed=25000000,fps=20

I got as far as using the generic balenablocks/fbcp and setting FBCP_DISPLAY=pitft35-resistive but I'm not sure how to achieve my other settings? Or is it expected to have both the device config and the env var set?

I realized that the balena-pihole repo currently does not have any instructions for enabling screens (intentionally) and just links to a related blog post. If I can figure out how to use this block I may just link to this repo instead :)

klutchell commented 3 years ago

I guess RESIN_HOST_CONFIG_display_rotate and similar vars may be of some help as documented here.

https://www.raspberrypi.org/documentation/configuration/config-txt/video.md

Does the dtoverlay at the device level need to be set at all if FBCP_DISPLAY=pitft35-resistive is set?

klutchell commented 3 years ago

@rahul-thakoor in case you are not watching this repo :)

rahul-thakoor commented 3 years ago

hey @klutchell

Does the dtoverlay at the device level need to be set at all if FBCP_DISPLAY=pitft35-resistive is set?

the fbcp driver used here does not utilize the notro/fbtft framebuffer driver.

so the dtoverlay should not be set.

you should be able to use the configs documented in https://www.raspberrypi.org/documentation/configuration/config-txt/video.md to achieve the rotation