Hi aBUGSworstnightmare,
Thanks for your reply and clarification regarding mipi-dbi-spi and DMA usage.
I did some further testing on my side using a Raspberry Pi 5 and the same 3.5inch RPi LCD (F), SKU 30896, with the 2024-11-19 raspios-bookworm-armhf.img and the 6.6.51 kernel (which is currently the default provided by Waveshare; still waiting for an updated driver for 6.12.y).
When I use your method with the bin file and the mipi-dbi-spi driver, I consistently get around 30fps on testufo.com.However, when I switch to Waveshare’s overlay method and make a few adjustments, I can reach 60fps. I’m attaching a screenshot from the Waveshare method for reference.Here’s the tail of my working config.txt:Would it be possible to tweak your method to achieve a similar result — i.e., closer to 60fps — either by tuning speed/fps or adjusting how the SPI bus is used? I'm curious if this is just a matter of overlay tuning, or if it relates more deeply to the differences in driver behavior.
Thanks again for your continued input and insights!
Thanks for your reply and clarification regarding mipi-dbi-spi and DMA usage.
I did some further testing on my side using a Raspberry Pi 5 and the same 3.5inch RPi LCD (F), SKU 30896, with the 2024-11-19 raspios-bookworm-armhf.img and the 6.6.51 kernel (which is currently the default provided by Waveshare; still waiting for an updated driver for 6.12.y).
When I use your method with the bin file and the mipi-dbi-spi driver, I consistently get around 30fps on testufo.com.
Code:
dtparam=i2c_arm=ondtparam=i2c_arm_baudrate=50000dtparam=spi=ondtoverlay=Waveshare35f,fps=60,speed=108000000,rotate=90,ts_rotate_90hdmi_force_hotplug=1max_usb_current=1hdmi_group=2hdmi_mode=87hdmi_cvt 480 320 60 6 0 0 0hdmi_drive=2Thanks again for your continued input and insights!
Statistics: Posted by ooook — Fri May 16, 2025 6:53 am