Android Customizing the Linux kernel: Difference between revisions

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== Manual build Android Linux Kernel ==
<!-- Set release according to "release" parameter in URL and use RELEASE_N7.1.1_1.0.0_VAR-SOM-MX6 as default
Change to Android top level directory.
--> {{#vardefine:RELEASE_PARAM|{{#urlget:release}}}} <!--
{{#ifeq: {{#var:ANDROID_NXP_VERSION}} | O8.0.0_1.0.0 |
--> {{#lst:Android_Platform_Customization|{{#var:RELEASE_PARAM|RELEASE_N7.1.1_1.0.0_VAR-SOM-MX6}}}} <!--
$ cd {{#var:BUILD_FOLDER_ANDROID}}
--> {{PageHeader|{{#var:HARDWARE_NAME}} - Android {{#var:ANDROID_NAME}} {{#var:ANDROID_VERSION}} Developer Guide}} {{DocImage|category1={{#var:HARDWARE_NAME}}|category2=Android}} __toc__
|
$ cd {{#var:BUILD_FOLDER}}/{{#var:BUILD_FOLDER_ANDROID}}
|}}
{{#ifeq: {{#var:ANDROID_NXP_VERSION}} | O8.0.0_1.0.0 |
$ source build/envsetup.sh
$ lunch var_mx6-eng
or
$ lunch var_mx6-userdebug
<span style="color:red">Note: </span> var_mx6-userdebug creates a debuggable version of Android.
var_mx6-eng creates an engineering version of Android. Development mode enable and development tools are available on target.
|
$ source build/envsetup.sh
$ lunch var_mx6-eng
or
$ lunch var_mx6-user
<span style="color:red">Note: </span> 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 ==
== Manual build and customizing Android Linux Kernel ==
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 ==
== Making changes to kernel configuration ==
  $ make -j4 BUILD_TARGET_DEVICE=sd bootimage 2>&1 | tee build1-1.log
$ cd {{#var:BUILD_FOLDER}}/{{#var:BUILD_FOLDER_ANDROID}}/vendor/variscite/kernel_imx/
  $ make ARCH={{#ifeq: {{#var:HARDWARE_NAME}} |VAR-SOM-MX6|arm|arm64}} mrproper
$ make ARCH={{#ifeq: {{#var:HARDWARE_NAME}} |VAR-SOM-MX6|arm|arm64}} {{#var:KERNEL_DEFCONFIG}}
$ make ARCH={{#ifeq: {{#var:HARDWARE_NAME}} |VAR-SOM-MX6|arm|arm64}} menuconfig
Navigate the menu and select the desired kernel functionality
Exit the menu and answer "Yes" when asked "Do you wish to save your new configuration?"
$ make ARCH={{#ifeq: {{#var:HARDWARE_NAME}} |VAR-SOM-MX6|arm|arm64}} savedefconfig
$ cp arch/{{#ifeq: {{#var:HARDWARE_NAME}} |VAR-SOM-MX6|arm|arm64}}/configs/{{#var:KERNEL_DEFCONFIG}} arch/{{#ifeq: {{#var:HARDWARE_NAME}} |VAR-SOM-MX6|arm|arm64}}/configs/{{#var:KERNEL_DEFCONFIG}}.orig
$ cp defconfig arch/{{#ifeq: {{#var:HARDWARE_NAME}} |VAR-SOM-MX6|arm|arm64}}/configs/


*Note: When running Android from an SD card, the eMMC will be detected and presented as an SD card storage.
== Making changes to device tree ==
 
== 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
 
{| class="wikitable"
|-
! scope="col" | Setup Name<br/>
! scope="col" | Images Names<br/>
! scope="col" | SOM type<br/>
! scope="col" | Carrier Board type<br/>
! scope="col" | LCD Type<br/>
! scope="col" | Evaluation Kit name<br/>
|-
| style="padding: 5px;"| som-mx6qp-c
| style="padding: 5px;"| boot-som-mx6qp-c.img,<br>recovery-som-mx6qp-c.img
| style="padding: 5px;"| VAR-SOM-MX6_V2 (Quad Plus)
| style="padding: 5px;"| VAR-MX6CustomBoard
| style="padding: 5px;"| Capacitive touch
| style="padding: 5px;"| VAR-DVK-MX6_V2-PRO,<br>VAR-STK-MX6_V2
|-
| style="padding: 5px;"| som-mx6qp-r
| style="padding: 5px;"| boot-som-mx6qp-r.img,<br>recovery-som-mx6qp-r.img
| style="padding: 5px;"| VAR-SOM-MX6_V2 (Quad Plus)
| style="padding: 5px;"| VAR-MX6CustomBoard
| style="padding: 5px;"| Resistive touch
| style="padding: 5px;"| VAR-DVK-MX6_V2,<br>VAR-STK-MX6_V2
|-
| style="padding: 5px;"| som-mx6qp-vsc
| style="padding: 5px;"| boot-som-mx6qp-vsc.img,<br>recovery-som-mx6qp-vsc.img
| style="padding: 5px;"| VAR-SOM-MX6_V2 (Quad Plus)
| style="padding: 5px;"| VAR-SOLOCustomBoard
| style="padding: 5px;"| Capacitive LVDS touch
| style="padding: 5px;"| N/A
|-
| style="padding: 5px;"| som-mx6q-c
| style="padding: 5px;"| boot-som-mx6q-c.img,<br>recovery-som-mx6q-c.img
| style="padding: 5px;"| VAR-SOM-MX6_V2 (Quad / Dual)
| style="padding: 5px;"| VAR-MX6CustomBoard
| style="padding: 5px;"| Capacitive touch
| style="padding: 5px;"| VAR-DVK-MX6_V2-PRO,<br>VAR-STK-MX6_V2
|-
| style="padding: 5px;"| som-mx6q-r
| style="padding: 5px;"| boot-som-mx6q-r.img,<br>recovery-som-mx6q-r.img
| style="padding: 5px;"| VAR-SOM-MX6_V2 (Quad / Dual)
| style="padding: 5px;"| VAR-MX6CustomBoard
| style="padding: 5px;"| Resistive touch
| style="padding: 5px;"| VAR-DVK-MX6_V2,<br>VAR-STK-MX6_V2
|-
| style="padding: 5px;"| som-mx6q-vsc
| style="padding: 5px;"| boot-som-mx6q-vsc.img,<br>recovery-som-mx6q-vsc.img
| style="padding: 5px;"| VAR-SOM-MX6_V2 (Quad / Dual)
| style="padding: 5px;"| VAR-SOLOCustomBoard
| style="padding: 5px;"| Capacitive LVDS touch
| style="padding: 5px;"| N/A
|-
| style="padding: 5px;"| som-mx6dl-c
| style="padding: 5px;"| boot-som-mx6dl-c.img,<br>recovery-som-mx6dl-c.img
| style="padding: 5px;"| VAR-SOM-MX6_V2 (DualLite/ Solo)
| style="padding: 5px;"| VAR-MX6CustomBoard
| style="padding: 5px;"| Capacitive touch
| style="padding: 5px;"| N/A
|-
| style="padding: 5px;"| som-mx6dl-r
| style="padding: 5px;"| boot-som-mx6dl-r.img,<br>recovery-som-mx6dl-r.img
| style="padding: 5px;"| VAR-SOM-MX6_V2 (DualLite/ Solo)
| style="padding: 5px;"| VAR-MX6CustomBoard
| style="padding: 5px;"| Resistive touch
| style="padding: 5px;"| N/A
|-
| style="padding: 5px;"| som-solo-vsc
| style="padding: 5px;"| boot-som-solo-vsc.img,<br>recovery-som-solo-vsc.img
| style="padding: 5px;"| VAR-SOM-SOLO / VAR-SOM-DUAL
| style="padding: 5px;"| VAR-SOLOCustomBoard
| style="padding: 5px;"| Capacitive LVDS touch
| style="padding: 5px;"| VAR-DVK-SOLO/DUAL,<br>VAR-STK-SOLO/DUAL
|-
| style="padding: 5px;"| som-solo-c
| style="padding: 5px;"| boot-som-solo-c.img,<br>recovery-som-solo-c.img
| style="padding: 5px;"| VAR-SOM-SOLO / VAR-SOM-DUAL
| style="padding: 5px;"| VAR-MX6CustomBoard
| style="padding: 5px;"| Capacitive touch
| style="padding: 5px;"| N/A
|-
| style="padding: 5px;"| imx6q-var-dart
| style="padding: 5px;"| boot-imx6q-var-dart.img,<br>recovery-imx6q-var-dart.img
| style="padding: 5px;"| DART-MX6
| style="padding: 5px;"| VAR-DT6CustomBoard
| style="padding: 5px;"| Capacitive touch
| style="padding: 5px;"| VAR-STK-DT6,<br>VAR-DVK-DT6
|-
|}


== Build New boot.img ==
When you perform changes to the kernel, you may build boot.img solely instead of building the whole Android.
$ cd {{#var:BUILD_FOLDER}}/{{#var:BUILD_FOLDER_ANDROID}}
$ source build/envsetup.sh
$ lunch {{#var:ANDROID_MACHINE_NAME}}-userdebug
$ make bootimage


== Flashing bootimage to target ==
== Flashing bootimage to target ==
Line 130: Line 30:


  $ adb reboot bootloader
  $ adb reboot bootloader
  $ fastboot flash boot boot-<setup-name>.img
  $ fastboot flash boot {{#ifeq: {{#var:HARDWARE_NAME}} |VAR-SOM-MX6| boot-<setup-name>.img | boot.img>
Replace setup-name as per above table.
Replace setup-name as per above table.

Revision as of 22:12, 30 December 2019

VAR-SOM-MX6 - Android Nougat N7.1.1 Developer Guide

Manual build and customizing Android Linux Kernel

Making changes to kernel configuration

$ cd ~/var_n_711_100/n_711_100_build/vendor/variscite/kernel_imx/
$ make ARCH=arm mrproper
$ make ARCH=arm imx_v7_var_android_defconfig
$ make ARCH=arm menuconfig

Navigate the menu and select the desired kernel functionality Exit the menu and answer "Yes" when asked "Do you wish to save your new configuration?" 

$ make ARCH=arm savedefconfig
$ cp arch/arm/configs/imx_v7_var_android_defconfig arch/arm/configs/imx_v7_var_android_defconfig.orig 
$ cp defconfig arch/arm/configs/

Making changes to device tree

Build New boot.img

When you perform changes to the kernel, you may build boot.img solely instead of building the whole Android. 

$ cd ~/var_n_711_100/n_711_100_build
$ source build/envsetup.sh
$ lunch -userdebug
$ make bootimage

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 {{#ifeq: VAR-SOM-MX6 |VAR-SOM-MX6| boot-<setup-name>.img | boot.img>

Replace setup-name as per above table.

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This page was last edited on 30 December 2019, at 22:12.

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