7 inch WaveShare RGB LCD HAT for Raspberry Pi CM4
Following our phone conversation, I'm starting a thread on the forum. The problem concerns Android version 14 and higher. I need to get my device running with the "7-inch WaveShare RGB LCD HAT for Raspberry Pi CM4" display working. A year ago, I was using Android version 13 on this device, and after making the appropriate changes to the /boot/config.txt file, the display worked without any problems. Now, on Android version 14, after making the same changes to the same file, the display is "dead." The entries we added to this file in Android 13 are:
dtoverlay=vc4-kms-v3d dtoverlay=vc4-kms-DPI-7inch dtoverlay=waveshare-7dpi
After the changes, the file looked like this (/boot/config.txt):
# This file is generated and maintained by emteria # Please do not modify it manually, as your changes will be overwritten during the next OS update # If you need to add or overwrite something, please add your changes to config-overrides.txt file # audio dtparam=audio=on # Following definitions only apply when booted on Compute Module 4 [cm4] dtoverlay=dwc2,dr_mode=host dtoverlay=vc4-kms-v3d dtoverlay=vc4-kms-DPI-7inch dtoverlay=waveshare-7dpi # Following definitions always apply to all devices [all] kernel=u-boot.bin arm_64bit=1 # audio hdmi_force_edid_audio=1 # disable kms audio path and force bcm2835 card 0 = hdmi card 1 = headphone jack dtoverlay=vc4-kms-v3d,cma-384 dtoverlay=cma,cma-384 dtoverlay=rpivid-v4l2 disable_overscan=1 # add support for official 7" touchscreen dtoverlay=rpi-backlight display_auto_detect=1 dtoverlay=vc4-kms-v3d dtoverlay=vc4-kms-DPI-7inch dtoverlay=waveshare-7dpi # add overlay for camera sensor and use firmware with codecs dtoverlay=imx219 camera_auto_detect=1 start_x=1 # temporarily increase the CPU frequency on boot initial_turbo=60 # enable serial console and pin core clock fixed to 500MHz enable_uart=1 # load user-defined overrides for this config include config-overrides.txt
Thank you in advance for any help.
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Hi @Nexwell. Let's break it down into different parts and solve step by step. First, we need to make sure you have a working version on your side - doesn't matter which version. Since you already know that Android 13 was working fine, I will try to find that release in our archive and send it to you.
I found our release for CM4IO version 13.1.0 in our legacy installer. This is the same image you used, but in a different package format. You need to install it through our installer application right away.
First, please open our Downloads page and pick an installer for your OS:
Second, login into the installer and pick the correct device and version:
Here are some knowledge base articles to help you:
Please let me know if you can successfully boot the device with Android 13 by using your screen. If yes, we can continue with the next step of making it work on Android 16 or 17.