Android Customizing the Linux kernel

Manual build Android Linux Kernel

Change to Android top level directory.

$ cd /
$ source build/envsetup.sh
$ lunch var_mx6-eng
or
$ lunch var_mx6-user

Note: var_mx6-user creates a production version of Android. var_mx6-eng creates an engineering version of Android. Development mode enable and development tools are available on target.

Switching from eMMC build to SD card build and vice versa

When you switch your target MMC device you need to remove the fstab file. This will guarantee that the make system will copy the right one into target.

$ rm out/target/product/var_mx6/recovery/root/fstab* out/target/product/var_mx6/root/fstab*

Build Android for SD card

$ make -j4 BUILD_TARGET_DEVICE=sd bootimage 2>&1 | tee build1-1.log

• Note: When running Android from an SD card, the eMMC will be detected and presented as an SD card storage.

Build Android for on-SOM eMMC

$ make -j4 BUILD_TARGET_DEVICE=emmc bootimage 2>&1 | tee build1-1.log

This will generate image as per table below

Setup Name	Images Names	SOM type	Carrier Board type	LCD Type	Evaluation Kit name
som-mx6qp-c	boot-som-mx6qp-c.img, recovery-som-mx6qp-c.img	VAR-SOM-MX6_V2 (Quad Plus)	VAR-MX6CustomBoard	Capacitive touch	VAR-DVK-MX6_V2-PRO, VAR-STK-MX6_V2
som-mx6qp-r	boot-som-mx6qp-r.img, recovery-som-mx6qp-r.img	VAR-SOM-MX6_V2 (Quad Plus)	VAR-MX6CustomBoard	Resistive touch	VAR-DVK-MX6_V2, VAR-STK-MX6_V2
som-mx6qp-vsc	boot-som-mx6qp-vsc.img, recovery-som-mx6qp-vsc.img	VAR-SOM-MX6_V2 (Quad Plus)	VAR-SOLOCustomBoard	Capacitive LVDS touch	N/A
som-mx6q-c	boot-som-mx6q-c.img, recovery-som-mx6q-c.img	VAR-SOM-MX6_V2 (Quad / Dual)	VAR-MX6CustomBoard	Capacitive touch	VAR-DVK-MX6_V2-PRO, VAR-STK-MX6_V2
som-mx6q-r	boot-som-mx6q-r.img, recovery-som-mx6q-r.img	VAR-SOM-MX6_V2 (Quad / Dual)	VAR-MX6CustomBoard	Resistive touch	VAR-DVK-MX6_V2, VAR-STK-MX6_V2
som-mx6q-vsc	boot-som-mx6q-vsc.img, recovery-som-mx6q-vsc.img	VAR-SOM-MX6_V2 (Quad / Dual)	VAR-SOLOCustomBoard	Capacitive LVDS touch	N/A
som-mx6dl-c	boot-som-mx6dl-c.img, recovery-som-mx6dl-c.img	VAR-SOM-MX6_V2 (DualLite/ Solo)	VAR-MX6CustomBoard	Capacitive touch	N/A
som-mx6dl-r	boot-som-mx6dl-r.img, recovery-som-mx6dl-r.img	VAR-SOM-MX6_V2 (DualLite/ Solo)	VAR-MX6CustomBoard	Resistive touch	N/A
som-solo-vsc	boot-som-solo-vsc.img, recovery-som-solo-vsc.img	VAR-SOM-SOLO / VAR-SOM-DUAL	VAR-SOLOCustomBoard	Capacitive LVDS touch	VAR-DVK-SOLO/DUAL, VAR-STK-SOLO/DUAL
som-solo-c	boot-som-solo-c.img, recovery-som-solo-c.img	VAR-SOM-SOLO / VAR-SOM-DUAL	VAR-MX6CustomBoard	Capacitive touch	N/A
imx6q-var-dart	boot-imx6q-var-dart.img, recovery-imx6q-var-dart.img	DART-MX6	VAR-DT6CustomBoard	Capacitive touch	VAR-STK-DT6, VAR-DVK-DT6

Flashing bootimage to target

Make sure device is in the fastboot mode if not , reboot in fastboot mode by using below commands.

adb reboot bootloader
$ fastboot flash boot boot-<setup-name>.img

Replace setup-name as per above table.