Rockchip RK3036 Kernel - Revision history

Admin at 09:19, 8 December 2017

2017-12-08T09:19:55Z

Admin at 09:18, 8 December 2017

2017-12-08T09:18:48Z

Admin at 09:16, 8 December 2017

2017-12-08T09:16:53Z

Admin at 09:14, 8 December 2017

2017-12-08T09:14:16Z

Admin at 09:12, 8 December 2017

2017-12-08T09:12:32Z

Admin at 09:07, 8 December 2017

2017-12-08T09:07:17Z

Admin: Created page with " = Download Kernel = You can clone the rockchip kernel repository from github which is kernel 4.4 based:

git clone https://github.com/rockchip-linux/kernel.git

&..."

2017-12-08T09:00:24Z

Created page with " = Download Kernel = You can clone the rockchip kernel repository from github which is kernel 4.4 based: <pre>git clone https://github.com/rockchip-linux/kernel.git </pre> &..."

New page

= Download Kernel =

You can clone the rockchip kernel repository from github which is kernel 4.4 based:
<pre>git clone https://github.com/rockchip-linux/kernel.git
</pre>

 

= Configure and Build =

You will need to use rockchip_linux_defconfig for Linux OS
<pre>make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- rockchip_linux_defconfig
make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- -j4
</pre>

 

Then you can get Image/zImage and dtb file.

 

= Install Boot/kernel =

We use distro boot in U-Boot, so we need to make a boot partition for U-Boot with kernel image and dtb inside.
<pre>mkdir boot
cp arch/arm/boot/dts/rk3036-kylin.dtb boot/rk3036-kylin.dtb
cp arch/arm/boot/zImage boot/</pre>

Add extlinux/extlinux.conf for distro boot.
<pre>mkdir boot/extlinux
vi boot/extlinux/extlinux.conf</pre>

 
<pre>label kernel-4.4
    kernel /zImage
    fdt /rk3036-kylin.dtb
    append  earlyprintk console=tty1 console=ttyS2,115200n8 rw root=PARTUUID=69dad710-2c rootfstype=ext4 init=/sbin/init rootwait
</pre>

 

== Generate ext2fs boot partition ==

by genext2fs:
<pre>genext2fs -b 32768 -B $((32*1024*1024/32768)) -d boot/ -i 8192 -U boot_rk3036.img</pre>

According to Rockchip partition definition, you need to flash this image to boot partiton which offset is 0x8000.

 

== Generate fatfs boot partition ==

=== Generate boot.img in fatfs ===

Below commands can generate a fatfs boot.img
<pre>dd if=/dev/zero of=boot.img bs=1M count=32
sudo mkfs.fat boot.img
mkdir tmp
sudo mount boot.img tmp/
cp -r boot/* tmp/
umount tmp</pre>

Done!

Flash this boot.img to boot partition, which is offset 0x8000 in Rockchip partition definition.

=== Update boot.img via U-Boot in target ===

After flash and boot the U-Boot, write the gpt table from default partition table
<pre>gpt write mmc 0 $partitions
gpt verify mmc 0 $partitions</pre>

connect target to PC and start the ums in command line:
<pre>ums mmc 0</pre>

We should able to see a device connect to PC, formate and copy data into the partition(dev/sdb6 for example).
<pre>cp -r boot/* /media/machine/9F35-9565/
</pre>

Done!

 

== Boot from U-Boot ==

If you are using genext2fs to genarate the boot.img, you need write the gpt table in U-Boot command line:
<pre>gpt write mmc 0 $partitions</pre>

Then boot from eMMC or reset:
<pre>boot</pre>

If everything is OK, you should able to see the U-Boot log like this:
<pre>switch to partitions #0, OK
mmc0(part 0) is current device
Scanning mmc 0:4...
Found /extlinux/extlinux.conf
Retrieving file: /extlinux/extlinux.conf
reading /extlinux/extlinux.conf
192 bytes read in 4 ms (46.9 KiB/s)
1:      kernel-4.4
Retrieving file: /zImage
reading /zImage
7810312 bytes read in 726 ms (10.3 MiB/s)
append: earlyprintk console=tty1 console=ttyS2,115200n8 rw root=PARTUUID=69dad710-2c rootfstype=ext4 init=/sbin/init rootwait
Retrieving file: /rk3036-kylin.dtb
reading /rk3036-kylin.dtb
23641 bytes read in 6 ms (3.8 MiB/s)
Kernel image @ 0x62000000 [ 0x000000 - 0x772d08 ]
## Flattened Device Tree blob at 61f00000
   Booting using the fdt blob at 0x61f00000
   Loading Device Tree to 7df52000, end 7df5ac58 ... OK

Starting kernel ...

</pre>

@@ Line 120: / Line 120: @@
 &nbsp;
-DEBUG Kernel:
+== '''DEBUG Kernel''' ==
 if you have some issues on bringup kernel, you can enable the earlyprintk configs&nbsp;for rockchip_linux_defconfig
 For example:
-<pre>
+<pre>cat >> arch/arm/configs/rockchip_linux_defconfig << EOF
 CONFIG_DEBUG_LL=y
 CONFIG_DEBUG_RK29_UART2=y
 CONFIG_EARLY_PRINTK=y
 EOF</pre>

@@ Line 125: / Line 125: @@
 For example:
 <pre>
-cd arch/arm/configs/rockchip_linux_defconfig
+cat >> arch/arm/configs/rockchip_linux_defconfig << EOF
 CONFIG_DEBUG_LL=y
-+CONFIG_DEBUG_LL=y<br/> +CONFIG_DEBUG_RK29_UART2=y<br/> +CONFIG_EARLY_PRINTK=y
+CONFIG_DEBUG_RK29_UART2=y
 CONFIG_EARLY_PRINTK=y
-&nbsp;
+EOF</pre>

@@ Line 66: / Line 66: @@
 Flash this boot.img to boot partition, which is offset 0x8000 in Rockchip partition definition.
 <pre>sudo rkdeveloptool wl 0x8000&nbsp;boot.img</pre>
@@ Line 117: / Line 116: @@
 Starting kernel ...
 </pre>

← Older revision		Revision as of 09:14, 8 December 2017
Line 66:		Line 66:

	Flash this boot.img to boot partition, which is offset 0x8000 in Rockchip partition definition.		Flash this boot.img to boot partition, which is offset 0x8000 in Rockchip partition definition.
		+
		+	<pre>sudo rkdeveloptool wl 0x8000 boot.img</pre>

	=== Update boot.img via U-Boot in target ===		=== Update boot.img via U-Boot in target ===

@@ Line 47: / Line 47: @@
 According to Rockchip partition definition, you need to flash this image to boot partiton which offset is 0x8000.
-&nbsp;
+Then, how to generate boot.img? Please have a look at the following:
 == Generate fatfs boot partition ==

@@ Line 30: / Line 30: @@
 Add extlinux/extlinux.conf for distro boot.
 <pre>mkdir boot/extlinux
-vi boot/extlinux/extlinux.conf</pre>
+</pre>
+<pre>cat >> boot/extlinux/extlinux.conf << EOF
-&nbsp;
+label kernel-4.4
 &nbsp; &nbsp; kernel /zImage
 &nbsp; &nbsp; fdt /rk3036-kylin.dtb
 &nbsp; &nbsp; append &nbsp;earlyprintk console=tty1 console=ttyS2,115200n8 rw root=PARTUUID=69dad710-2c rootfstype=ext4 init=/sbin/init rootwait
 </pre>