FYI about DMA issues on esp32

Micropython
6

With the following initialization I do see a 40Mhz clock on my scope:

disp = ili9341(spihost=2, miso=19, mosi=23, clk=18,
    cs=12, dc=14, rst=13, power=-1, backlight=-1,
    mhz=40, factor=16, hybrid=True)

I did not add SPI_DEVICE_NO_DUMMY, but I am using the iomux pins. ESP-IDF 4.0.1.
Go figure…