STM: displayio interfering with sdio? Also sdio clock speed not settable

[dhalbert]

CircuitPython version

8.0.0-beta.6

Code/REPL

import board
import sdioio
import storage
import time
import displayio
import adafruit_displayio_sh1107

i2c = board.I2C()
displayio.release_displays()
display_bus = displayio.I2CDisplay(i2c, device_address=0x3C)
display = adafruit_displayio_sh1107.SH1107(display_bus, width=128, height=64)

sdcard = sdioio.SDCard(
    clock=board.SDIO_CLOCK,
    command=board.SDIO_COMMAND,
    data=board.SDIO_DATA,
    frequency=2500000)
print(f"{sdcard.frequency=}")

vfs = storage.VfsFat(sdcard)

storage.mount(vfs, "/sd")

with open( "/sd/test.txt", "w" ) as f:
    f.write( "year, month, day, batch\n" )
    f.write( "2022, 12, 30, 0\n" )

with open("/sd/test.txt", "r") as f:
    print("Printing lines in file:")
    print()
    line = f.readline()
    while line != '':
        print(line)
        line = f.readline()
        print()

Behavior

OSError: [Errno 5] Input/output error

If the display = line is commented out, it works.

Description

No response

Additional information

Reported in https://forums.adafruit.com/viewtopic.php?p=954144 Seems related to #6082, which does not use displayio.

Another odd thing is that setting frequency= seems to have no effect, as noted by the print() in the test program.

[dhalbert]

Maybe similar code in i.MX as well