juj

Hey, that is great to hear! Made a TODO to make that a build option. It seems that different instances of the same controller out there may need to use...

While there does exist a kernel module in this tree, it is not actually currently used for anything (the code has been left there in case it proves useful later...

> I was somewhat hoping that it would be possible to have something like this: > > * Application renders frame to GPU > > * Application sends "vsync" signal...

> The main limitation I'm looking to get around is being able to show one thing on the LCD and another on the HDMI screen. Ok, now I understand. Thinking...

Thanks for the update.. there are so many changes that unfortunately reviewing this may become a challenge. At a glance the changes seem solid, but I fear already now that...

> Is this because I'm guessing at the display name for **DADAFRUIT_ST7789_HAT=ON**? I dropped the DWAVESHARE and VW from the example, I've also tried the Waveshare option. What is the...

If you dig up the pin wirings for that display, you should be able to drive it with fbcp-ili9341, as it seems to be a ST7789.

On DMA, check out the documentation at https://github.com/juj/fbcp-ili9341#specifying-other-build-options ``` -DDMA_TX_CHANNEL=: Specifies the DMA channel number to use for SPI send commands. Change this if you find a DMA channel conflict....

> How do I detect and get unused DMA channels？ There is unfortunately no way to properly allocate unused DMA channels from user space. It would be possible to allocate...

Interesting info! By default the Pi 3B idles at 250MHz and turbos up to 400MHz, so divisor 14 gives a max rate of 28.57MHz for that display, same as the...