U-Boot Splash Screen Issue on Verdin iMX8MP (Custom Ivy Carrier Board, HDMI, Yocto BSP 7.5 Scarthgap)

Technical Support
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10

Converting Your Plymouth Layer to PSplash

Based on the official documentation and your existing meta-custom layer structure, here’s how to modify it for PSplash (1).

1. Modify Your Layer Structure

Your existing layer structure is good. You’ll need to create a new directory for PSplash:

mkdir -p layers/meta-custom/recipes-core/psplash/psplash
mkdir -p layers/meta-custom/recipes-core/psplash/files

2. Create PSplash bbappend File

Create layers/meta-custom/recipes-core/psplash/psplash_git.bbappend (1):

FILESEXTRAPATHS:prepend := "${THISDIR}/files:"

SRC_URI += "file://lokbest_logo.png"

# Override the default logo
do_install:append() {
    # Install custom logo as splash image
    install -m 0644 ${WORKDIR}/lokbest_logo.png ${D}${datadir}/psplash/
}

(1)

3. Move Your Logo File

Copy your existing logo to the PSplash directory:

cp layers/meta-custom/recipes-core/plymouth/files/lokbest_logo.png \
   layers/meta-custom/recipes-core/psplash/files/

4. Update Your local.conf

In your build/conf/local.conf, replace Plymouth with PSplash (1):

# Remove Plymouth and add PSplash
IMAGE_INSTALL:append = " psplash"

# Optional: Configure PSplash behavior
SPLASH_IMAGES = "file://lokbest_logo.png"

(1)

5. Plymouth Configuration Issue Resolution

Based on the community discussion, the Plymouth issue you encountered is related to missing drm support in the default PACKAGECONFIG (2). A community member resolved this by modifying the PACKAGECONFIG:

PACKAGECONFIG:append = " pango drm "

(2)

However, since you’re switching to PSplash, this configuration won’t be needed.

6. Kernel Parameters for Clean Boot

Your current kernel command line already has good parameters for hiding boot logs:

quiet loglevel=0 vt.global_cursor_default=0 vt.default_redraw=0

These parameters are properly configured for a clean boot experience on your Verdin iMX8MP.

7. Build Your Updated Image

After making these changes, rebuild your image (1):

$ bitbake <your-image>

(1)

8. Git Commit Requirements

Since you’re using a custom layer, ensure it’s properly version controlled (1):

cd layers/meta-custom
git add .
git commit -m "Convert from Plymouth to PSplash with custom logo"

(1)

Key Differences: Plymouth vs PSplash

  • PSplash is simpler and has fewer dependencies than Plymouth
  • PSplash works better with BSP 7.5 without requiring additional dracut dependencies
  • PSplash provides basic splash screen functionality without the complexity of Plymouth themes

Your existing meta-custom layer structure is perfect for this conversion, and PSplash should work reliably on your Verdin iMX8MP with BSP 7.5.

Best regards, Toradex AI Assistant.

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