View source for Dmssa51 intel i226


=== Get Source Code ===
<pre>$ git clone http://172.22.31.139:30000/acg/DMS-SA51/kernel_5.16.0_RC3.git
</pre>

=== Docker ===
<pre>advrisc/u16.04-rklbv1:latest
</pre>

=== Build Kernel ===
<pre>$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- rockchip_dmssa51_defconfig
$ make ARCH=arm64 CROSS_COMPILE=aarch64-linux-gnu- -j8
</pre>

=== Deploy ===

We adopted the Debian 10 [https://wiki.radxa.com/Home radxa] to be our boot image.<br/> <span style="color:blue">'''rockpi4b_debian_buster_xfce4_arm64_20210608_1321-gpt.img'''</span><br/> First, we check the partion list in this image
<pre>Disk rockpi4b_debian_buster_xfce4_arm64_20210608_1321-gpt.img: 2.8 GiB, 3000000000 bytes, 5859375 sectors
Units: sectors of 1 * 512 = 512 bytes
Sector size (logical/physical): 512 bytes / 512 bytes
I/O size (minimum/optimal): 512 bytes / 512 bytes
Disklabel type: gpt
Disk identifier: 78703516-CE7D-4B45-A139-ACFFBE62762C

Device                                                      Start     End Sectors  Size Type
rockpi4b_debian_buster_xfce4_arm64_20210608_1321-gpt.img1      64    8063    8000  3.9M Microsoft basic data
rockpi4b_debian_buster_xfce4_arm64_20210608_1321-gpt.img2   16384   24575    8192    4M Microsoft basic data
rockpi4b_debian_buster_xfce4_arm64_20210608_1321-gpt.img3   24576   32767    8192    4M Microsoft basic data
rockpi4b_debian_buster_xfce4_arm64_20210608_1321-gpt.img4   32768 1081343 1048576  512M EFI System
rockpi4b_debian_buster_xfce4_arm64_20210608_1321-gpt.img5 1081344 5859341 4777998  2.3G Linux filesystem
</pre>

The boot partition is the forth. We mount it
<pre>$ sudo mount -o loop,offset=16777216 rockpi4b_debian_buster_xfce4_arm64_20210608_1321-gpt.img disk
</pre>

Read the boot menu in the extlinux.conf
<pre>$ vi disk/extlinux/extlinux.conf
</pre>

The default menu of this image
<pre>label kernel-4.4.154-112-rockchip-gfdb18c8bab17
    kernel /vmlinuz-4.4.154-112-rockchip-gfdb18c8bab17
    initrd /initrd.img-4.4.154-112-rockchip-gfdb18c8bab17
    devicetreedir /dtbs/4.4.154-112-rockchip-gfdb18c8bab17
    append earlyprintk console=ttyFIQ0,1500000n8 rw init=/sbin/init rootfstype=ext4 rootwait  root=UUID=3eff3098-0936-4a20-8e2f-f6048d96509a console=ttyS2,1500000n8
</pre>

Change configuration for our new 5.16 kernel, updating&nbsp;boot image(Image_k5) and dtb(rk3399-rock-pi-4b.dtb). The root point to EMMC mmcblk1 and rootfs is img5.
<pre>label kernel-16.5
    kernel /Image_k5
    fdt /dtbs/rk3399-rock-pi-4b.dtb
    devicetreedir /dtbs/
    append earlycon=uart8250,mmio32,0xff1a0000 swiotlb=1 log_buf_len=104857600 coherent_pool=1m earlyprintk console=ttyS2,1500000n8 rw root=/dev/mmcblk1p5 rootfstype=ext4 init=/sbin/init rootwait
</pre>

=== Flash ===

Please flash miniloader first or it get failed. Before flash image, please put device to maskrom status.
<pre>$ sudo ./rkbin/tools/rkdeveloptool db rk3399_loader_v1.20.119.bin
$ sudo ./rkbin/tools/rkdeveloptool wl 0 rockpi4b_debian_buster_xfce4_arm64_20210608_1321-gpt.img
$ sudo ./rkbin/tools/rkdeveloptool rd
</pre>

=== Note ===

*The debug baudrate is <span style="color:red">'''1500000'''</span>,You may change this value [https://blog.csdn.net/kris_fei/article/details/79552426 HERE]. 
*It get error while first boot, then it will reboot automatically. 
*Image&nbsp;:&nbsp;\acg_dms\image\DMS_SA51\Intel-I226\rockpi4b_debian_buster_xfce4_arm64_20210608_1321-gpt_i226.img
*[http://ess-wiki.advantech.com.tw/view/DMS-SA51 BACK]