Custom Boot Logo Display on OGA

• Logo Image Format
• How to replace logo [method 1] - Add logo.bmp in SD Card
• How to replace logo [method 2] - Change logo part in SPI Flash
• Tips to enable boot messages

Basic image format of ODROID-GO Advanced is as following.

Image Format : 24-bit Windows BMP image
Image Size : 320 by 480
Color Depth : 24bpp
File Name : 'logo.bmp'

Also note that it's counterclockwise (CCW) rotation image.
Here is the sample bmp files.
https://github.com/hardkernel/u-boot/tree/odroidgoA-v2017.09/tools/images/hardkernel

We recommend using GIMP or KolourPaint.
Here is an advanced option.

[ GIMP ]

- Export as Windows BMP
- Compatibility Options : Do not write Color Space Information
- Advanced Options : 24 bits Color
- Name : "logo.bmp"

[ KolourPaint ]

- Save Image as 
- Filter : Windows BMP image
- Convert to : 24-bit Color

There are two ways to replace boot logo with your custom image.

1. Add a bmp image in BOOT folder (vfat partition) of SD Card
2. Replace logo partition image in SPI Flash

We recommend method[1] because it's easier for you to add/remove/change your custom logo.

- Copy logo.bmp into BOOT folder of SD Card
- Try board booting

Please refer to this forum thread and github commit.
You can get a prebuilt u-boot binary set there.

• https://forum.odroid.com/viewtopic.php?f=194&t=37853#p283354
• https://github.com/hardkernel/u-boot/commit/1d26e6c536200fb6fdcda026f54b9b5721e49ef5

This section describes how to update 'logo_hardkernel' partition of SPI Flash.
With this method, you don't need to add logo.bmp in SD Card and,
but it's more complicated.

Please change logo_hardkernel.bmp in this path of u-boot source code.
https://github.com/hardkernel/u-boot/tree/odroidgoA-v2017.09/tools/images/hardkernel

Build recovery image.
https://wiki.odroid.com/odroid_go_advance/recovery_spirom#build_recovery_image

Update SPI Flash using the recovery image.
https://wiki.odroid.com/odroid_go_advance/recovery_spirom#run_recovery_process

Standard boot messages during kernel booting is disabled by default.
If you want to enable it, please modify boot.ini as following.

Please note that the Kernel boot log display may slow down the booting time a couple of seconds.

Remove quiet option in bootargs.

### setenv bootargs "root=UUID='e139ce78-9841-40fe-8823-96a304a09859' rootwait rw fsck.repair=yes net.ifnames=0 fbcon=rotate:3 console=/dev/ttyFIQ0,115200 quiet splash plymouth.ignore-serial-consoles consoleblank=0"

setenv bootargs "root=UUID='e139ce78-9841-40fe-8823-96a304a09859' rootwait rw fsck.repair=yes net.ifnames=0 fbcon=rotate:3 console=/dev/ttyFIQ0,115200 splash plymouth.ignore-serial-consoles consoleblank=0"

To activate boot messages on Display, remove console and plymouth options.

### setenv bootargs "root=UUID='e139ce78-9841-40fe-8823-96a304a09859' rootwait rw fsck.repair=yes net.ifnames=0 fbcon=rotate:3 console=/dev/ttyFIQ0,115200 quiet splash plymouth.ignore-serial-consoles consoleblank=0"

setenv bootargs "root=UUID='e139ce78-9841-40fe-8823-96a304a09859' rootwait rw fsck.repair=yes net.ifnames=0 fbcon=rotate:3"