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Integrate yocto-install/prepare-logo

GitBot requested to merge integrate/yocto-install/prepare-logo/into/kirkstone into kirkstone

Commit: seco-ne/tools/yocto-install@8245a163

Add script to change kernel boot logo

A PNG logo can be added to the boot partition during installation via the "--Image" parameter of the fng-install.sh.

During the postinstallation phase, the prepare-logo.sh script generates a logo.dat blob in the boot partition which can be used by the custom logo driver.

During boot, the bootloader reads this blob into the memory. The logo driver will get logo memory address and size from dtb. If this points to a correct data, logo, loaded into memory will be displayed.

The prepare-logo.sh can be also executed later by user to exchange the logo:

  • manually copy logo file (png or pnm) to target rootfs
  • manually call every script in /etc/fng-postinstall
  • reboot

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Commit: seco-ne/tools/yocto-install@90b65355

fng-install: do not rename boot logo image

The logo file can be in PNG or PNM format. Keep original file name and extension of image.

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