Tips for boot logo on ODROID-C2

ODROID-C2 can show a booting logo on the display till target O/S is started.

The image format of ODROID-C2 logo file is as following.

Image Format : 24-bit Windows BMP image or 24-bit Windows Gzipped BMP image
Image Size : 1280 by 720
Bit Depth : 24bpp
The file name should be 'boot-logo.bmp' or 'boot-logo.bmp.gz'

On ODROID-C2 uboot, image scaling for boot logo is supported, so displayed boot logo will be fixed automatically for output mode as described in boot.ini.

For example, in case of using the mode “1024x600p60hz”, boot logo will be displayed as 1024×600 even though actual size of bmp file is 1280×720.

On Android, you can write your custom boot logo to 'FAT' area.

Or if you want to replace the default logo image in the android 'Logo' partition, follow the second instruction. But the first one with FAT area is easier and preferred.

Copy the new boot-logo.bmp (or boot-logo.bmp.gz) to VFAT partition.

The logo partition is internally assigned in U-boot itself, please refer this for detail. This works just for Android Users.

First, you must get into your U-boot command line while pressing any key when your ODROID-C2 is powered up. And execute fastboot command from U-boot and connect with your desktop using USB cable.

odroidc2#fastboot

Next, run fastboot command from your desktop.

$ fastboot flash logo boot-logo.bmp.gz
or 
$ fastboot flash logo boot-logo.bmp

Copy the new boot-logo.bmp (or boot-logo.bmp.gz) with to boot partition.

You should add the commands to your boot.ini before bootcmd is executed.

Please check if there is 'showlogo' command in your boot.ini first. If not so, refer to the following.

showlogo ${hdmimode}

showlogo ${m}
logoopt "osd1,loaded,0x3f800000,${m}"

# Boot Arguments - Add logo args on the existing bootargs parameter
setenv bootargs "root=UUID=e139ce78-9841-40fe-8823-96a304a09859 rootwait ro ${condev} no_console_suspend hdmimode=${m} m_bpp=${m_bpp} vout=${vout} fsck.repair=yes net.ifnames=0 elevator=noop disablehpd=${hpd} logo=${logoopt}"

To turn on USB Host power on uboot stage for power of VU7+/VU7, you should add one command, usb pwren after showlogo command in boot.ini.

showlogo ${hdmimode}
usb pwren

If you want to use a native resolution of bmp image like 1920×1080, 1024×600 (for VU7+) or 800×480 (for VU7) except 1280×720, please set the arg[2]/arg[3] of showlogo command as following.

Copy the bmp file as an aforementioned instruction first and then modify 'showlogo' command in boot.ini. The arg[2]/arg[3] of showlogo means image size of bmp file.

odroidc2#help showlogo
showlogo - Displaying BMP logo file to HDMI screen with the specified resolution

Usage:
showlogo <resolution> [<bmp_width> <bmp_height>]
        resolution - screen resoltuion on HDMI screen
                '1080p60hz' will be used by default if missing
        bmp_width (optional) - width of logo bmp file
                '1280' will be used by default if missing
        bmp_height (optional) - height of logo bmp file
                '720' will be used by default if missing

< Examples >

1. 1080p case

If your monitor's resolution is 1920by1080 and you want to set a bmp file in 1920×1080 not 1280×720 one as a boot logo file, set command in boot.ini as following.

setenv hdmimode "1080p60hz"
showlogo ${hdmimode} 1920 1080

2. 1024×600 case

setenv hdmimode "1024x600p60hz"
showlogo ${hdmimode} 1024 600

3. 800×480 case

setenv hdmimode "800x480p60hz"
showlogo ${hdmimode} 800 480