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rm-hull / luma.oled

Python module to drive a SSD1306 / SSD1309 / SSD1322 / SSD1325 / SSD1327 / SSD1331 / SSD1351 / SH1106 OLED
https://luma-oled.readthedocs.io
MIT License
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White display SPI issue with 6.x kernels #361

Closed jolla closed 1 year ago

jolla commented 1 year ago

After updating kernel to any 6.x kernel intermittently the display does not work, it will illuminate but is solid white, if I downgrade back to 5.19 kernel then the display works fine.

Display: st7735 Interface: SPI

1.44inch LCD Display HAT For Raspberry Pi, 128x128 Pixels, SPI Interface https://www.waveshare.com/1.44inch-lcd-hat.htm

Example tested: python3 3d_box.py --interface spi --height 128 --display st7735

Type of Raspberry Pi

CM4

Linux Kernel version

Linux wlanpi-f06 6.1.7-v8-wlanpi+ #1 SMP PREEMPT Fri Jan 20 14:26:31 UTC 2023 aarch64 GNU/Linux

Expected behaviour

Image should be displayed

Actual behaviour

Display is solid white

thijstriemstra commented 1 year ago

RaspberryPi OS doesn't support 6.x (yet) afaik: https://en.wikipedia.org/wiki/Raspberry_Pi_OS#Releases

Not sure what wlanpi is?

jolla commented 1 year ago

I was able to resolve this issue by switching the interface type from spi to gpio_cs_spi and then defining the chip select pin using the --gpio-chip-select parameter.