Compute Module • CM4 with both WiFi and PCie

Hi,
I am making a project in which I need both a USB Device, a Host and WiFi. Since CM4 has only one USB Port, I decided to use that as a USB Device and use UPD72020, which is PCIe to USB. But when I enable PCIe using dtparam=pciex1, WiFi is not working.

below is config.txt

# For more options and information see
# http://rptl.io/configtxt
# Some settings may impact device functionality. See link above for details
# Uncomment some or all of these to enable the optional hardware interfaces
dtparam=i2c_arm=on
#dtparam=i2s=on
#dtparam=spi=on
# Enable audio (loads snd_bcm2835)
dtparam=audio=on
dtoverlay=audremap,pins_12_13
# Additional overlays and parameters are documented
# /boot/firmware/overlays/README
# Automatically load overlays for detected cameras
camera_auto_detect=1
# Automatically load overlays for detected DSI displays
display_auto_detect=1
# Automatically load initramfs files, if found
auto_initramfs=1
# Enable DRM VC4 V3D driver
dtoverlay=vc4-kms-v3d
max_framebuffers=2
# Don't have the firmware create an initial video= setting in cmdline.txt.
# Use the kernel's default instead.
disable_fw_kms_setup=1
# Run in 64-bit mode
arm_64bit=1
# Disable compensation for displays with overscan
disable_overscan=1
# Run as fast as firmware / board allows
arm_boost=1
[cm4]
# Enable host mode on the 2711 built-in XHCI USB controller.
# This line should be removed if the legacy DWC2 controller is required
# (e.g. for USB device mode) or if USB support is not required.
dtoverlay=dwc2
dtparam=pciex1
[cm5]
dtoverlay=dwc2,dr_mode=host
[all]

Statistics: Posted by Aditya_23 — Thu Oct 16, 2025 11:31 am

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