OpenVoiceOS/buildroot-external/board/raspberrypi/config.txt

# Please note that this is only a sample, we recommend you to change it to fit
# your needs.
# You should override this file using a post-build script.
# See http://buildroot.org/manual.html#rootfs-custom
# and http://elinux.org/RPiconfig for a description of config.txt syntax
# We always use the same names, the real used variant is selected by
# BR2_PACKAGE_RPI_FIRMWARE_{DEFAULT,X,CD} choice
start_file=start.elf
fixup_file=fixup.dat

kernel=zImage

# To use an external initramfs file
# initramfs rootfs.cpio.gz

# Disable overscan assuming the display supports displaying the full resolution
# If the text shown on the screen disappears off the edge, comment this out
# disable_overscan=1
dtoverlay=vc4-fkms-v3d
hdmi_drive=2
hdmi_group=2
hdmi_mode=14
max_framebuffers=2

# uncomment if you get no picture on HDMI for a default "safe" mode
# hdmi_safe=1

# How much memory in MB to assign to the GPU on Pi models having
# 256, 512 or 1024 MB total memory
gpu_mem=256
gpu_mem_256=128
gpu_mem_512=128
gpu_mem_1024=128

# Enable the onboard soundcard
dtparam=audio=on

# Disable rainbow color splash
disable_splash=1

# Enable some optional hardware interfaces
dtparam=i2c_arm=on
dtoverlay=i2s-mmap
dtparam=i2s=on
dtparam=spi=on

# Disable GPIO IRQ
# dtoverlay=gpio-no-irq

#[pi3]
#dtoverlay=vc4-kms-v3d

#[pi4]
#dtoverlay=vc4-kms-v3d-pi4