Problem on CM4 with vc_dispmanx_display_open failed! Make sure to have hdmi_force_hotplug=1 setting in /boot/config.txt

[cherbin]

Hello,

I am trying to get the fbcp-ili9341 running on the CM4.

Getting the following error:
root@raspberrypi:~/fbcp-ili9341# ./fbcp-ili9341
bcm_host_get_peripheral_address: 0xfe000000, bcm_host_get_peripheral_size: 25165824, bcm_host_get_sdram_address: 0xc0000000
BCM core speed: current: 200000000hz, max turbo: 500000000hz. SPI CDIV: 12, SPI max frequency: 41666667hz
Allocated DMA channel 7
Allocated DMA channel 1
Enabling DMA channels Tx:7 and Rx:1
DMA hardware register file is at ptr: 0xf6083000, using DMA TX channel: 7 and DMA RX channel: 1
DMA hardware TX channel register file is at ptr: 0xf6083700, DMA RX channel register file is at ptr: 0xf6083100
Resetting DMA channels for use
DMA all set up
Initializing display
Resetting ili9488 display at reset GPIO pin 5
Creating SPI task thread
InitSPI done
vc_dispmanx_display_open failed! Make sure to have hdmi_force_hotplug=1 setting in /boot/config.txt

Can you please let us know what we can do to fix this error. Also hdmi_force_hotplug=1 is in the /boot/config.txt
Thanks

The cmake string is:

cmake -DILI9488=ON -DGPIO_TFT_DATA_CONTROL=13 -DGPIO_TFT_RESET_PIN=5 -DSPI_BUS_CLOCK_DIVISOR=12 -DISPLAY_CROPPED_INSTEAD_OF_SCALING=true -DARMV8A=ON

And the /boot/config.txt is:

lrwxrwxrwx 1 root root 19 Dec 4 18:07 config.txt -> firmware/config.txt
root@raspberrypi:~/fbcp-ili9341# cat /boot/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

DISPLAY FOR IceWallet Display

#dtparam=spi=on
hdmi_group=2
hdmi_mode=87
framebuffer_width=480
framebuffer_height=640
hdmi_cvt=480 640 60 1 0 0 0
hdmi_force_hotplug=1

Enable audio (loads snd_bcm2835)

dtparam=audio=on

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

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.

otg_mode=1

[all]