Build Bootup Logo for U-Boot
Below are the basic information for the bootup Logo on Amlogic platform(might different with other SoC platforms):
- The Logo is loaded on U-Boot
- Build as
logo.imgwith a separate
- Will display at the point U-Boot load
logo.img, and disappear until the bootanimation of Android is loaded.
- If you don't want to display a bootup logo, just leave
logopartition as blank.
Before starting, a bootup picture will be needed with below specs:
- BMP format, should be one of:
- 16bit RGB565 BMP format
- 24bit RGB888 BMP format
- Resolution <= 1080P (1920 * 1080)
Check the bmp file:
$ file ~/Pictures/khadas.bmp /home/gouwa/Pictures/khadas.bmp: data $
A example bootup logo file khadas.bmp for reference.
And in this guidance, we will introduce two different approaches to build the bootup Logo.
Build Logo Separately
1) Clone the tool:
$ git clone https://github.com/khadas/utils.git
2) Update a new logo picture as you want:
$ mkdir -p images/logo $ cp -r ~/Pictures/khadas.bmp images/logo/bootup.bmp
3) Build the logo:
$ ./utils/logo_img_packer -r images/logo/ images/logo.img dbg:item num 1 dbg:pack item [bootup] $
Build Logo on Android
1) Update a new logo picture as you want:
$ cp ~/Pictures/khadas.bmp device/khadas/kvim/product/logo/bootup.bmp
2) Build the logo:
$ make logoimg
Following build log for reference:
$ make logoimg ... generate out/target/product/kvim/upgrade/logo.img gzip -c device/khadas/kvim/product/logo/bootup.bmp > out/target/product/kvim/upgrade/logo/bootup.bmp dbg:item num 8 dbg:pack item [bootup] dbg:pack item [upgrade_upgrading] dbg:pack item [upgrade_fail] dbg:pack item [upgrade_unfocus] dbg:pack item [upgrade_error] dbg:pack item [upgrade_success] dbg:pack item [upgrade_logo] dbg:pack item [upgrade_bar] Installed out/target/product/kvim/upgrade/logo.img #### make completed successfully (01:54 (mm:ss)) #### $
Download the logo.img
1) Copy the new logo.img to a USB disk:
$ cp -r images/logo.img /media/gouwa/9B98-6C15/
2) Insert the USB disk into VIM device, then boot into U-Boot mode.
logo partition as new
kvim# usb_update logo logo.img
4) Refresh to new Logo:
kvim# run init_display
You might notice that there are some other pictures listed as below also built into
$ ls device/khadas/kvim/product/logo/ bootup.bmp upgrade_error.bmp upgrade_logo.bmp upgrade_unfocus.bmp upgrade_bar.bmp upgrade_fail.bmp upgrade_success.bmp upgrade_upgrading.bmp
These pictures are used for indicate the different upgrade states, it's optional for bootup Logo.
You can check following source code for further details: